Add buildah mkcw, add --cw to buildah commit and buildah build

Add a --cw option to `buildah build` and `buildah commit`, which takes a
comma-separated list of arguments and produces an image laid out for use
as a confidential workload:
  type: sev or snp
  attestation_url: location of a key broker server
  cpus: expected number of virtual CPUs to run with
  memory: expected megabytes of memory to run with
  workload_id: a distinguishing identifier for the key broker server
  ignore_attestation_errors: ignore errors registering the workload
  passphrase: for encrypting the disk image
  slop: extra space to allocate for the disk image

At least one of attestation_url and passphrase must be specified in
order for the encrypted disk image to be decryptable at run-time.  Other
arguments can be omitted.  ignore_attestation_errors is intentionally
undocumented, as it's mainly used to permit some amount of testing on
systems which don't have the required hardware.

Add an `mkcw` top-level command, for converting directly from an image
to a confidential workload.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

Makefile

@@ -39,7 +39,7 @@ LIBSECCOMP_COMMIT := release-2.3
 
 EXTRA_LDFLAGS ?=
 BUILDAH_LDFLAGS := $(GO_LDFLAGS) '-X main.GitCommit=$(GIT_COMMIT) -X main.buildInfo=$(SOURCE_DATE_EPOCH) -X main.cniVersion=$(CNI_COMMIT) $(EXTRA_LDFLAGS)'
-SOURCES=*.go imagebuildah/*.go bind/*.go chroot/*.go copier/*.go define/*.go docker/*.go internal/parse/*.go internal/source/*.go internal/util/*.go manifests/*.go pkg/chrootuser/*.go pkg/cli/*.go pkg/completion/*.go pkg/formats/*.go pkg/overlay/*.go pkg/parse/*.go pkg/rusage/*.go pkg/sshagent/*.go pkg/umask/*.go pkg/util/*.go util/*.go
+SOURCES=*.go imagebuildah/*.go bind/*.go chroot/*.go copier/*.go define/*.go docker/*.go internal/mkcw/*.go internal/mkcw/types/*.go internal/parse/*.go internal/source/*.go internal/util/*.go manifests/*.go pkg/chrootuser/*.go pkg/cli/*.go pkg/completion/*.go pkg/formats/*.go pkg/overlay/*.go pkg/parse/*.go pkg/rusage/*.go pkg/sshagent/*.go pkg/umask/*.go pkg/util/*.go util/*.go
 
 LINTFLAGS ?=
 
@@ -69,9 +69,22 @@ static:
 	mkdir -p ./bin
 	cp -rfp ./result/bin/* ./bin/
 
-bin/buildah: $(SOURCES) cmd/buildah/*.go
+bin/buildah: $(SOURCES) cmd/buildah/*.go internal/mkcw/embed/entrypoint.gz
 	$(GO_BUILD) $(BUILDAH_LDFLAGS) $(GO_GCFLAGS) "$(GOGCFLAGS)" -o $@ $(BUILDFLAGS) ./cmd/buildah
 
+ifneq ($(shell as --version | grep x86_64),)
+internal/mkcw/embed/entrypoint: internal/mkcw/embed/entrypoint.s
+	$(AS) -o $(patsubst %.s,%.o,$^) $^
+	$(LD) -o $@ $(patsubst %.s,%.o,$^)
+	strip $@
+else
+.PHONY: internal/mkcw/embed/entrypoint
+endif
+
+internal/mkcw/embed/entrypoint.gz: internal/mkcw/embed/entrypoint
+	$(RM) $@
+	gzip -k $^
+
 .PHONY: buildah
 buildah: bin/buildah
 

buildah.go

@@ -386,6 +386,11 @@ type ImportFromImageOptions struct {
 	SystemContext *types.SystemContext
 }
 
+// ConfidentialWorkloadOptions encapsulates options which control whether or not
+// we output an image whose rootfs contains a LUKS-compatibly-encrypted disk image
+// instead of the usual rootfs contents.
+type ConfidentialWorkloadOptions = define.ConfidentialWorkloadOptions
+
 // NewBuilder creates a new build container.
 func NewBuilder(ctx context.Context, store storage.Store, options BuilderOptions) (*Builder, error) {
 	if options.CommonBuildOpts == nil {

buildah_test.go

@@ -14,16 +14,22 @@ import (
 )
 
 func TestMain(m *testing.M) {
+	var logLevel string
 	debug := false
 	if InitReexec() {
 		return
 	}
 	flag.BoolVar(&debug, "debug", false, "turn on debug logging")
+	flag.StringVar(&logLevel, "log-level", "error", "log level")
 	flag.Parse()
-	logrus.SetLevel(logrus.ErrorLevel)
-	if debug {
-		logrus.SetLevel(logrus.DebugLevel)
+	level, err := logrus.ParseLevel(logLevel)
+	if err != nil {
+		logrus.Fatalf("error parsing log level %q: %v", logLevel, err)
 	}
+	if debug && level < logrus.DebugLevel {
+		level = logrus.DebugLevel
+	}
+	logrus.SetLevel(level)
 	os.Exit(m.Run())
 }
 

cmd/buildah/commit.go

@@ -27,6 +27,7 @@ type commitInputOptions struct {
 	blobCache          string
 	certDir            string
 	creds              string
+	cwOptions          string
 	disableCompression bool
 	format             string
 	iidfile            string
@@ -87,6 +88,7 @@ func commitListFlagSet(cmd *cobra.Command, opts *commitInputOptions) {
 	_ = cmd.RegisterFlagCompletionFunc("cert-dir", completion.AutocompleteDefault)
 	flags.StringVar(&opts.creds, "creds", "", "use `[username[:password]]` for accessing the registry")
 	_ = cmd.RegisterFlagCompletionFunc("creds", completion.AutocompleteNone)
+	flags.StringVar(&opts.cwOptions, "cw", "", "confidential workload `options`")
 	flags.BoolVarP(&opts.disableCompression, "disable-compression", "D", true, "don't compress layers")
 	flags.StringVarP(&opts.format, "format", "f", defaultFormat(), "`format` of the image manifest and metadata")
 	_ = cmd.RegisterFlagCompletionFunc("format", completion.AutocompleteNone)
@@ -239,6 +241,14 @@ func commitCmd(c *cobra.Command, args []string, iopts commitInputOptions) error
 		options.HistoryTimestamp = &timestamp
 	}
 
+	if iopts.cwOptions != "" {
+		confidentialWorkloadOptions, err := parse.GetConfidentialWorkloadOptions(iopts.cwOptions)
+		if err != nil {
+			return fmt.Errorf("parsing --cw arguments: %w", err)
+		}
+		options.ConfidentialWorkloadOptions = confidentialWorkloadOptions
+	}
+
 	if exclusiveFlags > 1 {
 		return errors.New("can not use more then one timestamp option at at time")
 	}

cmd/buildah/common.go

@@ -224,8 +224,8 @@ func Tail(a []string) []string {
 	return []string{}
 }
 
-// UsageTemplate returns the usage template for podman commands
-// This blocks the displaying of the global options. The main podman
+// UsageTemplate returns the usage template for buildah commands
+// This blocks the displaying of the global options. The main buildah
 // command should not use this.
 func UsageTemplate() string {
 	return `Usage:{{if .Runnable}}

cmd/buildah/main.go

@@ -104,7 +104,7 @@ func init() {
 	rootCmd.PersistentFlags().StringSliceVar(&globalFlagResults.UserNSUID, "userns-uid-map", []string{}, "default `ctrID:hostID:length` UID mapping to use")
 	rootCmd.PersistentFlags().StringSliceVar(&globalFlagResults.UserNSGID, "userns-gid-map", []string{}, "default `ctrID:hostID:length` GID mapping to use")
 	rootCmd.PersistentFlags().StringVar(&globalFlagResults.DefaultMountsFile, "default-mounts-file", "", "path to default mounts file")
-	rootCmd.PersistentFlags().StringVar(&globalFlagResults.LogLevel, logLevel, "warn", `The log level to be used. Either "trace", "debug", "info", "warn", "error", "fatal", or "panic".`)
+	rootCmd.PersistentFlags().StringVar(&globalFlagResults.LogLevel, logLevel, "warn", `the log level to be used, one of "trace", "debug", "info", "warn", "error", "fatal", or "panic"`)
 	rootCmd.PersistentFlags().StringVar(&globalFlagResults.CPUProfile, "cpu-profile", "", "`file` to write CPU profile")
 	rootCmd.PersistentFlags().StringVar(&globalFlagResults.MemoryProfile, "memory-profile", "", "`file` to write memory profile")
 

cmd/buildah/mkcw.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/containers/buildah"
+	"github.com/containers/buildah/define"
+	"github.com/containers/buildah/pkg/parse"
+	"github.com/spf13/cobra"
+)
+
+func mkcwCmd(c *cobra.Command, args []string, options buildah.CWConvertImageOptions) error {
+	ctx := getContext()
+
+	systemContext, err := parse.SystemContextFromOptions(c)
+	if err != nil {
+		return err
+	}
+
+	if options.AttestationURL == "" && options.DiskEncryptionPassphrase == "" {
+		return fmt.Errorf("neither --attestation-url nor --passphrase flags provided, disk would not be decryptable")
+	}
+
+	store, err := getStore(c)
+	if err != nil {
+		return err
+	}
+
+	options.InputImage = args[0]
+	options.Tag = args[1]
+	options.ReportWriter = os.Stderr
+	imageID, _, _, err := buildah.CWConvertImage(ctx, systemContext, store, options)
+	if err == nil {
+		fmt.Printf("%s\n", imageID)
+	}
+	return err
+}
+
+func init() {
+	var teeType string
+	var options buildah.CWConvertImageOptions
+	mkcwDescription := `Convert a conventional image to a confidential workload image.`
+	mkcwCommand := &cobra.Command{
+		Use:   "mkcw",
+		Short: "Convert a conventional image to a confidential workload image",
+		Long:  mkcwDescription,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			options.TeeType = define.TeeType(teeType)
+			return mkcwCmd(cmd, args, options)
+		},
+		Example: `buildah mkcw localhost/repository:typical localhost/repository:cw`,
+		Args:    cobra.ExactArgs(2),
+	}
+	mkcwCommand.SetUsageTemplate(UsageTemplate())
+	rootCmd.AddCommand(mkcwCommand)
+	flags := mkcwCommand.Flags()
+	flags.SetInterspersed(false)
+
+	flags.StringVarP(&teeType, "type", "t", "", "TEE (trusted execution environment) type: SEV,SNP (default: SNP)")
+	flags.StringVarP(&options.AttestationURL, "attestation-url", "u", "", "attestation server URL")
+	flags.StringVarP(&options.BaseImage, "base-image", "b", "", "alternate base image (default: scratch)")
+	flags.StringVarP(&options.DiskEncryptionPassphrase, "passphrase", "p", "", "disk encryption passphrase")
+	flags.IntVarP(&options.CPUs, "cpus", "c", 0, "number of CPUs to expect")
+	flags.IntVarP(&options.Memory, "memory", "m", 0, "amount of memory to expect (MB)")
+	flags.StringVarP(&options.WorkloadID, "workload-id", "w", "", "workload ID")
+	flags.StringVarP(&options.Slop, "slop", "s", "25%", "extra space needed for converting a container rootfs to a disk image")
+	flags.StringVarP(&options.FirmwareLibrary, "firmware-library", "f", "", "location of libkrunfw-sev.so")
+	flags.BoolVarP(&options.IgnoreAttestationErrors, "ignore-attestation-errors", "", false, "ignore attestation errors")
+	if err := flags.MarkHidden("ignore-attestation-errors"); err != nil {
+		panic(fmt.Sprintf("error marking ignore-attestation-errors as hidden: %v", err))
+	}
+	flags.String("signature-policy", "", "`pathname` of signature policy file (not usually used)")
+	if err := flags.MarkHidden("signature-policy"); err != nil {
+		panic(fmt.Sprintf("error marking signature-policy as hidden: %v", err))
+	}
+}

commit.go

@@ -105,6 +105,10 @@ type CommitOptions struct {
 	// integers in the slice represent 0-indexed layer indices, with support for negative
 	// indexing. i.e. 0 is the first layer, -1 is the last (top-most) layer.
 	OciEncryptLayers *[]int
+	// ConfidentialWorkloadOptions is used to force the output image's rootfs to contain a
+	// LUKS-compatibly encrypted disk image (for use with krun) instead of the usual
+	// contents of a rootfs.
+	ConfidentialWorkloadOptions ConfidentialWorkloadOptions
 	// UnsetEnvs is a list of environments to not add to final image.
 	// Deprecated: use UnsetEnv() before committing instead.
 	UnsetEnvs []string

convertcw.go

@@ -0,0 +1,217 @@
+package buildah
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/containers/buildah/define"
+	"github.com/containers/buildah/internal/mkcw"
+	"github.com/containers/image/v5/docker/reference"
+	"github.com/containers/image/v5/types"
+	encconfig "github.com/containers/ocicrypt/config"
+	"github.com/containers/storage"
+	"github.com/containers/storage/pkg/archive"
+	"github.com/opencontainers/go-digest"
+	"github.com/sirupsen/logrus"
+)
+
+// CWConvertImageOptions provides both required and optional bits of
+// configuration for CWConvertImage().
+type CWConvertImageOptions struct {
+	// Required parameters.
+	InputImage string
+
+	// If supplied, we'll tag the resulting image with the specified name.
+	Tag         string
+	OutputImage types.ImageReference
+
+	// If supplied, we'll register the workload with this server.
+	// Practically necessary if DiskEncryptionPassphrase is not set, in
+	// which case we'll generate one and throw it away after.
+	AttestationURL string
+
+	// Used to measure the environment.  If left unset (0), defaults will be applied.
+	CPUs   int
+	Memory int
+
+	// Can be manually set.  If left unset ("", false, nil), reasonable values will be used.
+	TeeType                  define.TeeType
+	IgnoreAttestationErrors  bool
+	WorkloadID               string
+	DiskEncryptionPassphrase string
+	Slop                     string
+	FirmwareLibrary          string
+	BaseImage                string
+	Logger                   *logrus.Logger
+
+	// Passed through to BuilderOptions. Most settings won't make
+	// sense to be made available here because we don't launch a process.
+	ContainerSuffix     string
+	PullPolicy          PullPolicy
+	BlobDirectory       string
+	SignaturePolicyPath string
+	ReportWriter        io.Writer
+	IDMappingOptions    *IDMappingOptions
+	Format              string
+	MaxPullRetries      int
+	PullRetryDelay      time.Duration
+	OciDecryptConfig    *encconfig.DecryptConfig
+	MountLabel          string
+}
+
+// CWConvertImage takes the rootfs and configuration from one image, generates a
+// LUKS-encrypted disk image that more or less includes them both, and puts the
+// result into a new container image.
+// Returns the new image's ID and digest on success, along with a canonical
+// reference for it if a repository name was specified.
+func CWConvertImage(ctx context.Context, systemContext *types.SystemContext, store storage.Store, options CWConvertImageOptions) (string, reference.Canonical, digest.Digest, error) {
+	// Apply our defaults if some options aren't set.
+	logger := options.Logger
+	if logger == nil {
+		logger = logrus.StandardLogger()
+	}
+
+	// Now create the target working container, pulling the base image if
+	// there is one and it isn't present.
+	builderOptions := BuilderOptions{
+		FromImage:     options.BaseImage,
+		SystemContext: systemContext,
+		Logger:        logger,
+
+		ContainerSuffix:     options.ContainerSuffix,
+		PullPolicy:          options.PullPolicy,
+		BlobDirectory:       options.BlobDirectory,
+		SignaturePolicyPath: options.SignaturePolicyPath,
+		ReportWriter:        options.ReportWriter,
+		IDMappingOptions:    options.IDMappingOptions,
+		Format:              options.Format,
+		MaxPullRetries:      options.MaxPullRetries,
+		PullRetryDelay:      options.PullRetryDelay,
+		OciDecryptConfig:    options.OciDecryptConfig,
+		MountLabel:          options.MountLabel,
+	}
+	target, err := NewBuilder(ctx, store, builderOptions)
+	if err != nil {
+		return "", nil, "", fmt.Errorf("creating container from target image: %w", err)
+	}
+	defer func() {
+		if err := target.Delete(); err != nil {
+			logrus.Warnf("deleting target container: %v", err)
+		}
+	}()
+	targetDir, err := target.Mount("")
+	if err != nil {
+		return "", nil, "", fmt.Errorf("mounting target container: %w", err)
+	}
+	defer func() {
+		if err := target.Unmount(); err != nil {
+			logrus.Warnf("unmounting target container: %v", err)
+		}
+	}()
+
+	// Mount the source image, pulling it first if necessary.
+	builderOptions = BuilderOptions{
+		FromImage:     options.InputImage,
+		SystemContext: systemContext,
+		Logger:        logger,
+
+		ContainerSuffix:     options.ContainerSuffix,
+		PullPolicy:          options.PullPolicy,
+		BlobDirectory:       options.BlobDirectory,
+		SignaturePolicyPath: options.SignaturePolicyPath,
+		ReportWriter:        options.ReportWriter,
+		IDMappingOptions:    options.IDMappingOptions,
+		Format:              options.Format,
+		MaxPullRetries:      options.MaxPullRetries,
+		PullRetryDelay:      options.PullRetryDelay,
+		OciDecryptConfig:    options.OciDecryptConfig,
+		MountLabel:          options.MountLabel,
+	}
+	source, err := NewBuilder(ctx, store, builderOptions)
+	if err != nil {
+		return "", nil, "", fmt.Errorf("creating container from source image: %w", err)
+	}
+	defer func() {
+		if err := source.Delete(); err != nil {
+			logrus.Warnf("deleting source container: %v", err)
+		}
+	}()
+	sourceInfo := GetBuildInfo(source)
+	if err != nil {
+		return "", nil, "", fmt.Errorf("retrieving info about source image: %w", err)
+	}
+	sourceImageID := sourceInfo.FromImageID
+	sourceSize, err := store.ImageSize(sourceImageID)
+	if err != nil {
+		return "", nil, "", fmt.Errorf("computing size of source image: %w", err)
+	}
+	sourceDir, err := source.Mount("")
+	if err != nil {
+		return "", nil, "", fmt.Errorf("mounting source container: %w", err)
+	}
+	defer func() {
+		if err := source.Unmount(); err != nil {
+			logrus.Warnf("unmounting source container: %v", err)
+		}
+	}()
+
+	// Generate the image contents.
+	archiveOptions := mkcw.ArchiveOptions{
+		AttestationURL:           options.AttestationURL,
+		CPUs:                     options.CPUs,
+		Memory:                   options.Memory,
+		TempDir:                  targetDir,
+		TeeType:                  options.TeeType,
+		IgnoreAttestationErrors:  options.IgnoreAttestationErrors,
+		ImageSize:                sourceSize,
+		WorkloadID:               options.WorkloadID,
+		DiskEncryptionPassphrase: options.DiskEncryptionPassphrase,
+		Slop:                     options.Slop,
+		FirmwareLibrary:          options.FirmwareLibrary,
+		Logger:                   logger,
+	}
+	rc, workloadConfig, err := mkcw.Archive(sourceDir, &source.OCIv1, archiveOptions)
+	if err != nil {
+		return "", nil, "", fmt.Errorf("generating encrypted image content: %w", err)
+	}
+	if err = archive.Untar(rc, targetDir, &archive.TarOptions{}); err != nil {
+		if err = rc.Close(); err != nil {
+			logger.Warnf("cleaning up: %v", err)
+		}
+		return "", nil, "", fmt.Errorf("saving encrypted image content: %w", err)
+	}
+	if err = rc.Close(); err != nil {
+		return "", nil, "", fmt.Errorf("cleaning up: %w", err)
+	}
+
+	// Commit the image.  Clear out most of the configuration (if there is any — we default
+	// to scratch as a base) so that an engine that doesn't or can't set up a TEE will just
+	// run the static entrypoint.  The rest of the configuration which the runtime consults
+	// is in the .krun_config.json file in the encrypted filesystem.
+	logger.Log(logrus.DebugLevel, "committing disk image")
+	target.ClearAnnotations()
+	target.ClearEnv()
+	target.ClearLabels()
+	target.ClearOnBuild()
+	target.ClearPorts()
+	target.ClearVolumes()
+	target.SetCmd(nil)
+	target.SetCreatedBy(fmt.Sprintf(": convert %q for use with %q", sourceImageID, workloadConfig.Type))
+	target.SetDomainname("")
+	target.SetEntrypoint([]string{"/entrypoint"})
+	target.SetHealthcheck(nil)
+	target.SetHostname("")
+	target.SetMaintainer("")
+	target.SetShell(nil)
+	target.SetUser("")
+	target.SetWorkDir("")
+	commitOptions := CommitOptions{
+		SystemContext: systemContext,
+	}
+	if options.Tag != "" {
+		commitOptions.AdditionalTags = append(commitOptions.AdditionalTags, options.Tag)
+	}
+	return target.Commit(ctx, options.OutputImage, commitOptions)
+}

convertcw_test.go

@@ -0,0 +1,163 @@
+package buildah
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sync"
+	"testing"
+
+	"github.com/containers/buildah/internal/mkcw"
+	mkcwtypes "github.com/containers/buildah/internal/mkcw/types"
+	"github.com/containers/image/v5/types"
+	"github.com/containers/storage"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// dummyAttestationHandler replies with a fixed response code to requests to
+// the right path, and caches passphrases indexed by workload ID
+type dummyAttestationHandler struct {
+	t               *testing.T
+	status          int
+	passphrases     map[string]string
+	passphrasesLock sync.Mutex
+}
+
+func (d *dummyAttestationHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	var body bytes.Buffer
+	if req.Body != nil {
+		if _, err := io.Copy(&body, req.Body); err != nil {
+			d.t.Logf("reading request body: %v", err)
+			return
+		}
+		req.Body.Close()
+	}
+	if req.URL != nil && req.URL.Path == "/kbs/v0/register_workload" {
+		var registrationRequest mkcwtypes.RegistrationRequest
+		// if we can't decode the client request, bail
+		if err := json.Unmarshal(body.Bytes(), &registrationRequest); err != nil {
+			rw.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		// cache the passphrase
+		d.passphrasesLock.Lock()
+		if d.passphrases == nil {
+			d.passphrases = make(map[string]string)
+		}
+		d.passphrases[registrationRequest.WorkloadID] = registrationRequest.Passphrase
+		d.passphrasesLock.Unlock()
+		// return the predetermined status
+		status := d.status
+		if status == 0 {
+			status = http.StatusOK
+		}
+		rw.WriteHeader(status)
+		return
+	}
+	// no such handler
+	rw.WriteHeader(http.StatusInternalServerError)
+}
+
+func TestCWConvertImage(t *testing.T) {
+	ctx := context.TODO()
+	systemContext := &types.SystemContext{}
+	for _, status := range []int{http.StatusOK, http.StatusInternalServerError} {
+		for _, ignoreChainRetrievalErrors := range []bool{false, true} {
+			for _, ignoreAttestationErrors := range []bool{false, true} {
+				t.Run(fmt.Sprintf("status=%d,ignoreChainRetrievalErrors=%v,ignoreAttestationErrors=%v", status, ignoreChainRetrievalErrors, ignoreAttestationErrors), func(t *testing.T) {
+					// create a per-test Store object
+					storeOptions := storage.StoreOptions{
+						GraphRoot:       t.TempDir(),
+						RunRoot:         t.TempDir(),
+						GraphDriverName: "vfs",
+					}
+					store, err := storage.GetStore(storeOptions)
+					require.NoError(t, err)
+					t.Cleanup(func() {
+						if _, err := store.Shutdown(true); err != nil {
+							t.Logf("store.Shutdown(%q): %v", t.Name(), err)
+						}
+					})
+					// listen on a system-assigned port
+					listener, err := net.Listen("tcp", ":0")
+					require.NoError(t, err)
+					// keep track of our listener address
+					addr := listener.Addr()
+					// serve requests on that listener
+					handler := &dummyAttestationHandler{t: t, status: status}
+					server := http.Server{
+						Handler: handler,
+					}
+					go func() {
+						if err := server.Serve(listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
+							t.Logf("serve: %v", err)
+						}
+					}()
+					// clean up at the end of this test
+					t.Cleanup(func() { assert.NoError(t, server.Close()) })
+					// convert an image
+					options := CWConvertImageOptions{
+						InputImage:              "docker.io/library/busybox",
+						Tag:                     "localhost/busybox:encrypted",
+						AttestationURL:          "http://" + addr.String(),
+						IgnoreAttestationErrors: ignoreAttestationErrors,
+						Slop:                    "16MB",
+					}
+					id, _, _, err := CWConvertImage(ctx, systemContext, store, options)
+					if status != http.StatusOK && !ignoreAttestationErrors {
+						assert.Error(t, err)
+						return
+					}
+					if ignoreChainRetrievalErrors && ignoreAttestationErrors {
+						assert.NoError(t, err)
+					}
+					if err != nil {
+						t.Skipf("%s: %v", t.Name(), err)
+						return
+					}
+					// mount the image
+					path, err := store.MountImage(id, nil, "")
+					require.NoError(t, err)
+					t.Cleanup(func() {
+						if _, err := store.UnmountImage(id, true); err != nil {
+							t.Logf("store.UnmountImage(%q): %v", t.Name(), err)
+						}
+					})
+					// check that the image's contents look like what we expect: disk
+					disk := filepath.Join(path, "disk.img")
+					require.FileExists(t, disk)
+					workloadConfig, err := mkcw.ReadWorkloadConfigFromImage(disk)
+					require.NoError(t, err)
+					handler.passphrasesLock.Lock()
+					decryptionPassphrase := handler.passphrases[workloadConfig.WorkloadID]
+					handler.passphrasesLock.Unlock()
+					err = mkcw.CheckLUKSPassphrase(disk, decryptionPassphrase)
+					assert.NoError(t, err)
+					// check that the image's contents look like what we expect: config file
+					config := filepath.Join(path, "krun-sev.json")
+					require.FileExists(t, config)
+					workloadConfigBytes, err := os.ReadFile(config)
+					require.NoError(t, err)
+					var workloadConfigTwo mkcwtypes.WorkloadConfig
+					err = json.Unmarshal(workloadConfigBytes, &workloadConfigTwo)
+					require.NoError(t, err)
+					assert.Equal(t, workloadConfig, workloadConfigTwo)
+					// check that the image's contents look like what we expect: an executable entry point
+					entrypoint := filepath.Join(path, "entrypoint")
+					require.FileExists(t, entrypoint)
+					st, err := os.Stat(entrypoint)
+					require.NoError(t, err)
+					assert.Equal(t, st.Mode().Type(), os.FileMode(0)) // regular file
+				})
+			}
+		}
+	}
+}

define/build.go

@@ -163,6 +163,10 @@ type BuildOptions struct {
 	// It allows end user to export recently built rootfs into a directory or tar.
 	// See the documentation of 'buildah build --output' for the details of the format.
 	BuildOutput string
+	// ConfidentialWorkload controls whether or not, and if so, how, we produce an
+	// image that's meant to be run using krun as a VM instead of a conventional
+	// process-type container.
+	ConfidentialWorkload ConfidentialWorkloadOptions
 	// Additional tags to add to the image that we write, if we know of a
 	// way to add them.
 	AdditionalTags []string

define/types.go

@@ -47,8 +47,16 @@ const (
 	OCI = "oci"
 	// DOCKER used to define the "docker" image format
 	DOCKER = "docker"
+
+	// SEV is a known trusted execution environment type: AMD-SEV (secure encrypted virtualization using encrypted state, requires epyc 1000 "naples")
+	SEV TeeType = "sev"
+	// SNP is a known trusted execution environment type: AMD-SNP (SEV secure nested pages) (requires epyc 3000 "milan")
+	SNP TeeType = "snp"
 )
 
+// TeeType is a supported trusted execution environment type.
+type TeeType string
+
 var (
 	// DefaultCapabilities is the list of capabilities which we grant by
 	// default to containers which are running under UID 0.
@@ -105,6 +113,23 @@ type BuildOutputOption struct {
 	IsStdout bool
 }
 
+// ConfidentialWorkloadOptions encapsulates options which control whether or not
+// we output an image whose rootfs contains a LUKS-compatibly-encrypted disk image
+// instead of the usual rootfs contents.
+type ConfidentialWorkloadOptions struct {
+	Convert                  bool
+	AttestationURL           string
+	CPUs                     int
+	Memory                   int
+	TempDir                  string
+	TeeType                  TeeType
+	IgnoreAttestationErrors  bool
+	WorkloadID               string
+	DiskEncryptionPassphrase string
+	Slop                     string
+	FirmwareLibrary          string
+}
+
 // TempDirForURL checks if the passed-in string looks like a URL or -.  If it is,
 // TempDirForURL creates a temporary directory, arranges for its contents to be
 // the contents of that URL, and returns the temporary directory's path, along

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/containernetworking/plugins v1.3.0
 	github.com/containers/common v0.55.1-0.20230830075933-12405381ff45
 	github.com/containers/image/v5 v5.26.1-0.20230807184415-3fb422379cfa
+	github.com/containers/luksy v0.0.0-20230808154129-d2d74a56682f
 	github.com/containers/ocicrypt v1.1.8
 	github.com/containers/storage v1.49.0
 	github.com/cyphar/filepath-securejoin v0.2.4
@@ -48,6 +49,7 @@ require (
 	github.com/Microsoft/hcsshim v0.10.0 // indirect
 	github.com/VividCortex/ewma v1.2.0 // indirect
 	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d // indirect
+	github.com/aead/serpent v0.0.0-20160714141033-fba169763ea6 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
 	github.com/chzyer/readline v1.5.1 // indirect
 	github.com/container-orchestrated-devices/container-device-interface v0.6.0 // indirect

go.sum

@@ -19,6 +19,8 @@ github.com/VividCortex/ewma v1.2.0 h1:f58SaIzcDXrSy3kWaHNvuJgJ3Nmz59Zji6XoJR/q1o
 github.com/VividCortex/ewma v1.2.0/go.mod h1:nz4BbCtbLyFDeC9SUHbtcT5644juEuWfUAUnGx7j5l4=
 github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d h1:licZJFw2RwpHMqeKTCYkitsPqHNxTmd4SNR5r94FGM8=
 github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d/go.mod h1:asat636LX7Bqt5lYEZ27JNDcqxfjdBQuJ/MM4CN/Lzo=
+github.com/aead/serpent v0.0.0-20160714141033-fba169763ea6 h1:5L8Mj9Co9sJVgW3TpYk2gxGJnDjsYuboNTcRmbtGKGs=
+github.com/aead/serpent v0.0.0-20160714141033-fba169763ea6/go.mod h1:3HgLJ9d18kXMLQlJvIY3+FszZYMxCz8WfE2MQ7hDY0w=
 github.com/asaskevich/govalidator v0.0.0-20200907205600-7a23bdc65eef/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
@@ -56,6 +58,8 @@ github.com/containers/image/v5 v5.26.1-0.20230807184415-3fb422379cfa h1:wDfVQtc6
 github.com/containers/image/v5 v5.26.1-0.20230807184415-3fb422379cfa/go.mod h1:apL4qwq31NV0gsSZQJPxYyTH0yzWavmMCjT8vsQaXSk=
 github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01 h1:Qzk5C6cYglewc+UyGf6lc8Mj2UaPTHy/iF2De0/77CA=
 github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01/go.mod h1:9rfv8iPl1ZP7aqh9YA68wnZv2NUDbXdcdPHVz0pFbPY=
+github.com/containers/luksy v0.0.0-20230808154129-d2d74a56682f h1:/HjLNYkVoUJNT4mm2dzGl63x7nD6YHxxI/k1kR0TkzA=
+github.com/containers/luksy v0.0.0-20230808154129-d2d74a56682f/go.mod h1:hEjwW0sePqkTahMzbzeDsQEXN2zdF2VAccqSj5vb1NY=
 github.com/containers/ocicrypt v1.1.8 h1:saSBF0/8DyPUjzcxMVzL2OBUWCkvRvqIm75pu0ADSZk=
 github.com/containers/ocicrypt v1.1.8/go.mod h1:jM362hyBtbwLMWzXQZTlkjKGAQf/BN/LFMtH0FIRt34=
 github.com/containers/storage v1.49.0 h1:7Vqj8OKlwlcWZ4U61+eS2bNwyIG/qXQo/UZVW5kXn74=

image.go

@@ -16,6 +16,7 @@ import (
 	"github.com/containers/buildah/copier"
 	"github.com/containers/buildah/define"
 	"github.com/containers/buildah/docker"
+	"github.com/containers/buildah/internal/mkcw"
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/image"
 	"github.com/containers/image/v5/manifest"
@@ -69,6 +70,7 @@ type containerImageRef struct {
 	annotations           map[string]string
 	preferredManifestType string
 	squash                bool
+	confidentialWorkload  ConfidentialWorkloadOptions
 	omitHistory           bool
 	emptyLayer            bool
 	idMappingOptions      *define.IDMappingOptions
@@ -158,6 +160,52 @@ func computeLayerMIMEType(what string, layerCompression archive.Compression) (om
 	return omediaType, dmediaType, nil
 }
 
+// Extract the container's whole filesystem as a filesystem image, wrapped
+// in LUKS-compatible encryption.
+func (i *containerImageRef) extractConfidentialWorkloadFS(options ConfidentialWorkloadOptions) (io.ReadCloser, error) {
+	var image v1.Image
+	if err := json.Unmarshal(i.oconfig, &image); err != nil {
+		return nil, fmt.Errorf("recreating OCI configuration for %q: %w", i.containerID, err)
+	}
+	mountPoint, err := i.store.Mount(i.containerID, i.mountLabel)
+	if err != nil {
+		return nil, fmt.Errorf("mounting container %q: %w", i.containerID, err)
+	}
+	archiveOptions := mkcw.ArchiveOptions{
+		AttestationURL:           options.AttestationURL,
+		CPUs:                     options.CPUs,
+		Memory:                   options.Memory,
+		TempDir:                  options.TempDir,
+		TeeType:                  options.TeeType,
+		IgnoreAttestationErrors:  options.IgnoreAttestationErrors,
+		WorkloadID:               options.WorkloadID,
+		DiskEncryptionPassphrase: options.DiskEncryptionPassphrase,
+		Slop:                     options.Slop,
+		FirmwareLibrary:          options.FirmwareLibrary,
+	}
+	rc, _, err := mkcw.Archive(mountPoint, &image, archiveOptions)
+	if err != nil {
+		if _, err2 := i.store.Unmount(i.containerID, false); err2 != nil {
+			logrus.Debugf("unmounting container %q: %v", i.containerID, err2)
+		}
+		return nil, fmt.Errorf("converting rootfs %q: %w", i.containerID, err)
+	}
+	return ioutils.NewReadCloserWrapper(rc, func() error {
+		if err = rc.Close(); err != nil {
+			err = fmt.Errorf("closing tar archive of container %q: %w", i.containerID, err)
+		}
+		if _, err2 := i.store.Unmount(i.containerID, false); err == nil {
+			if err2 != nil {
+				err2 = fmt.Errorf("unmounting container %q: %w", i.containerID, err2)
+			}
+			err = err2
+		} else {
+			logrus.Debugf("unmounting container %q: %v", i.containerID, err2)
+		}
+		return err
+	}), nil
+}
+
 // Extract the container's whole filesystem as if it were a single layer.
 // Takes ExtractRootfsOptions as argument which allows caller to configure
 // preserve nature of setuid,setgid,sticky and extended attributes
@@ -221,7 +269,7 @@ func (i *containerImageRef) createConfigsAndManifests() (v1.Image, v1.Manifest,
 	oimage.RootFS.DiffIDs = []digest.Digest{}
 	// Only clear the history if we're squashing, otherwise leave it be so that we can append
 	// entries to it.
-	if i.squash || i.omitHistory {
+	if i.confidentialWorkload.Convert || i.squash || i.omitHistory {
 		oimage.History = []v1.History{}
 	}
 
@@ -237,6 +285,24 @@ func (i *containerImageRef) createConfigsAndManifests() (v1.Image, v1.Manifest,
 	}
 	// Always replace this value, since we're newer than our base image.
 	dimage.Created = created
+	// If we're producing a confidential workload, override the command and
+	// assorted other settings that aren't expected to work correctly.
+	if i.confidentialWorkload.Convert {
+		dimage.Config.Entrypoint = []string{"/entrypoint"}
+		oimage.Config.Entrypoint = []string{"/entrypoint"}
+		dimage.Config.Cmd = nil
+		oimage.Config.Cmd = nil
+		dimage.Config.User = ""
+		oimage.Config.User = ""
+		dimage.Config.WorkingDir = ""
+		oimage.Config.WorkingDir = ""
+		dimage.Config.Healthcheck = nil
+		dimage.Config.Shell = nil
+		dimage.Config.Volumes = nil
+		oimage.Config.Volumes = nil
+		dimage.Config.ExposedPorts = nil
+		oimage.Config.ExposedPorts = nil
+	}
 	// Clear the list of diffIDs, since we always repopulate it.
 	dimage.RootFS = &docker.V2S2RootFS{}
 	dimage.RootFS.Type = docker.TypeLayers
@@ -244,7 +310,7 @@ func (i *containerImageRef) createConfigsAndManifests() (v1.Image, v1.Manifest,
 	// Only clear the history if we're squashing, otherwise leave it be so
 	// that we can append entries to it.  Clear the parent, too, we no
 	// longer include its layers and history.
-	if i.squash || i.omitHistory {
+	if i.confidentialWorkload.Convert || i.squash || i.omitHistory {
 		dimage.Parent = ""
 		dimage.History = []docker.V2S2History{}
 	}
@@ -296,7 +362,7 @@ func (i *containerImageRef) NewImageSource(ctx context.Context, sc *types.System
 	for layer != nil {
 		layers = append(append([]string{}, layerID), layers...)
 		layerID = layer.Parent
-		if layerID == "" || i.squash {
+		if layerID == "" || i.confidentialWorkload.Convert || i.squash {
 			err = nil
 			break
 		}
@@ -333,7 +399,7 @@ func (i *containerImageRef) NewImageSource(ctx context.Context, sc *types.System
 	blobLayers := make(map[digest.Digest]blobLayerInfo)
 	for _, layerID := range layers {
 		what := fmt.Sprintf("layer %q", layerID)
-		if i.squash {
+		if i.confidentialWorkload.Convert || i.squash {
 			what = fmt.Sprintf("container %q", i.containerID)
 		}
 		// The default layer media type assumes no compression.
@@ -351,7 +417,7 @@ func (i *containerImageRef) NewImageSource(ctx context.Context, sc *types.System
 		}
 		// If we already know the digest of the contents of parent
 		// layers, reuse their blobsums, diff IDs, and sizes.
-		if !i.squash && layerID != i.layerID && layer.UncompressedDigest != "" {
+		if !i.confidentialWorkload.Convert && !i.squash && layerID != i.layerID && layer.UncompressedDigest != "" {
 			layerBlobSum := layer.UncompressedDigest
 			layerBlobSize := layer.UncompressedSize
 			diffID := layer.UncompressedDigest
@@ -389,7 +455,13 @@ func (i *containerImageRef) NewImageSource(ctx context.Context, sc *types.System
 		}
 		var rc io.ReadCloser
 		var errChan chan error
-		if i.squash {
+		if i.confidentialWorkload.Convert {
+			// Convert the root filesystem into an encrypted disk image.
+			rc, err = i.extractConfidentialWorkloadFS(i.confidentialWorkload)
+			if err != nil {
+				return nil, err
+			}
+		} else if i.squash {
 			// Extract the root filesystem as a single layer.
 			rc, errChan, err = i.extractRootfs(ExtractRootfsOptions{})
 			if err != nil {
@@ -842,6 +914,7 @@ func (b *Builder) makeContainerImageRef(options CommitOptions) (*containerImageR
 		annotations:           b.Annotations(),
 		preferredManifestType: manifestType,
 		squash:                options.Squash,
+		confidentialWorkload:  options.ConfidentialWorkloadOptions,
 		omitHistory:           options.OmitHistory,
 		emptyLayer:            options.EmptyLayer && !options.Squash,
 		idMappingOptions:      &b.IDMappingOptions,

imagebuildah/executor.go

@@ -148,6 +148,7 @@ type Executor struct {
 	osVersion               string
 	osFeatures              []string
 	envs                    []string
+	confidentialWorkload    define.ConfidentialWorkloadOptions
 }
 
 type imageTypeAndHistoryAndDiffIDs struct {
@@ -303,6 +304,7 @@ func newExecutor(logger *logrus.Logger, logPrefix string, store storage.Store, o
 		osVersion:                      options.OSVersion,
 		osFeatures:                     append([]string{}, options.OSFeatures...),
 		envs:                           append([]string{}, options.Envs...),
+		confidentialWorkload:           options.ConfidentialWorkload,
 	}
 	if exec.err == nil {
 		exec.err = os.Stderr

imagebuildah/stage_executor.go

@@ -1032,7 +1032,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 			// squash the contents of the base image.  Whichever is
 			// the case, we need to commit() to create a new image.
 			logCommit(s.output, -1)
-			if imgID, ref, err = s.commit(ctx, s.getCreatedBy(nil, ""), false, s.output, s.executor.squash); err != nil {
+			if imgID, ref, err = s.commit(ctx, s.getCreatedBy(nil, ""), false, s.output, s.executor.squash, lastStage); err != nil {
 				return "", nil, fmt.Errorf("committing base container: %w", err)
 			}
 			// Generate build output if needed.
@@ -1045,7 +1045,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 			// The image would be modified by the labels passed
 			// via the command line, so we need to commit.
 			logCommit(s.output, -1)
-			if imgID, ref, err = s.commit(ctx, s.getCreatedBy(stage.Node, ""), true, s.output, s.executor.squash); err != nil {
+			if imgID, ref, err = s.commit(ctx, s.getCreatedBy(stage.Node, ""), true, s.output, s.executor.squash, lastStage); err != nil {
 				return "", nil, err
 			}
 			// Generate build output if needed.
@@ -1193,7 +1193,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 				// stage.
 				if lastStage || imageIsUsedLater {
 					logCommit(s.output, i)
-					imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), false, s.output, s.executor.squash)
+					imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), false, s.output, s.executor.squash, lastStage && lastInstruction)
 					if err != nil {
 						return "", nil, fmt.Errorf("committing container for step %+v: %w", *step, err)
 					}
@@ -1420,7 +1420,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 			// because at this point we want to save history for
 			// layers even if its a squashed build so that they
 			// can be part of build-cache.
-			imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), !s.stepRequiresLayer(step), commitName, false)
+			imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), !s.stepRequiresLayer(step), commitName, false, lastStage && lastInstruction)
 			if err != nil {
 				return "", nil, fmt.Errorf("committing container for step %+v: %w", *step, err)
 			}
@@ -1454,7 +1454,7 @@ func (s *StageExecutor) Execute(ctx context.Context, base string) (imgID string,
 				// Create a squashed version of this image
 				// if we're supposed to create one and this
 				// is the last instruction of the last stage.
-				imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), !s.stepRequiresLayer(step), commitName, true)
+				imgID, ref, err = s.commit(ctx, s.getCreatedBy(node, addedContentSummary), !s.stepRequiresLayer(step), commitName, true, lastStage && lastInstruction)
 				if err != nil {
 					return "", nil, fmt.Errorf("committing final squash step %+v: %w", *step, err)
 				}
@@ -1941,7 +1941,7 @@ func (s *StageExecutor) intermediateImageExists(ctx context.Context, currNode *p
 // commit writes the container's contents to an image, using a passed-in tag as
 // the name if there is one, generating a unique ID-based one otherwise.
 // or commit via any custom exporter if specified.
-func (s *StageExecutor) commit(ctx context.Context, createdBy string, emptyLayer bool, output string, squash bool) (string, reference.Canonical, error) {
+func (s *StageExecutor) commit(ctx context.Context, createdBy string, emptyLayer bool, output string, squash, finalInstruction bool) (string, reference.Canonical, error) {
 	ib := s.stage.Builder
 	var imageRef types.ImageReference
 	if output != "" {
@@ -2069,6 +2069,9 @@ func (s *StageExecutor) commit(ctx context.Context, createdBy string, emptyLayer
 		HistoryTimestamp:      s.executor.timestamp,
 		Manifest:              s.executor.manifest,
 	}
+	if finalInstruction {
+		options.ConfidentialWorkloadOptions = s.executor.confidentialWorkload
+	}
 	imgID, _, manifestDigest, err := s.builder.Commit(ctx, imageRef, options)
 	if err != nil {
 		return "", nil, err

internal/mkcw/archive.go

@@ -0,0 +1,464 @@
+package mkcw
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"encoding/binary"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/containers/luksy"
+	"github.com/docker/docker/pkg/ioutils"
+	"github.com/docker/go-units"
+	digest "github.com/opencontainers/go-digest"
+	v1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/sirupsen/logrus"
+)
+
+const minimumImageSize = 10 * 1024 * 1024
+
+// ArchiveOptions includes optional settings for generating an archive.
+type ArchiveOptions struct {
+	// If supplied, we'll register the workload with this server.
+	// Practically necessary if DiskEncryptionPassphrase is not set, in
+	// which case we'll generate one and throw it away after.
+	AttestationURL string
+
+	// Used to measure the environment.  If left unset (0, ""), defaults will be applied.
+	CPUs   int
+	Memory int
+
+	// Can be manually set.  If left unset ("", false, nil), reasonable values will be used.
+	TempDir                  string
+	TeeType                  TeeType
+	IgnoreAttestationErrors  bool
+	ImageSize                int64
+	WorkloadID               string
+	Slop                     string
+	DiskEncryptionPassphrase string
+	FirmwareLibrary          string
+	Logger                   *logrus.Logger
+}
+
+type chainRetrievalError struct {
+	stderr string
+	err    error
+}
+
+func (c chainRetrievalError) Error() string {
+	if trimmed := strings.TrimSpace(c.stderr); trimmed != "" {
+		return fmt.Sprintf("retrieving SEV certificate chain: sevctl: %v: %v", strings.TrimSpace(c.stderr), c.err)
+	}
+	return fmt.Sprintf("retrieving SEV certificate chain: sevctl: %v", c.err)
+}
+
+// Archive generates a WorkloadConfig for a specified directory and produces a
+// tar archive of a container image's rootfs with the expected contents.
+// The input directory will have a ".krun_config.json" file added to it while
+// this function is running, but it will be removed on completion.
+func Archive(path string, ociConfig *v1.Image, options ArchiveOptions) (io.ReadCloser, WorkloadConfig, error) {
+	const (
+		teeDefaultCPUs       = 2
+		teeDefaultMemory     = 512
+		teeDefaultFilesystem = "ext4"
+		teeDefaultTeeType    = SNP
+	)
+
+	if path == "" {
+		return nil, WorkloadConfig{}, fmt.Errorf("required path not specified")
+	}
+	logger := options.Logger
+	if logger == nil {
+		logger = logrus.StandardLogger()
+	}
+
+	teeType := options.TeeType
+	if teeType == "" {
+		teeType = teeDefaultTeeType
+	}
+	cpus := options.CPUs
+	if cpus == 0 {
+		cpus = teeDefaultCPUs
+	}
+	memory := options.Memory
+	if memory == 0 {
+		memory = teeDefaultMemory
+	}
+	filesystem := teeDefaultFilesystem
+	workloadID := options.WorkloadID
+	if workloadID == "" {
+		digestInput := path + filesystem + time.Now().String()
+		workloadID = digest.Canonical.FromString(digestInput).Encoded()
+	}
+	workloadConfig := WorkloadConfig{
+		Type:           teeType,
+		WorkloadID:     workloadID,
+		CPUs:           cpus,
+		Memory:         memory,
+		AttestationURL: options.AttestationURL,
+	}
+
+	// Do things which are specific to the type of TEE we're building for.
+	var chainBytes []byte
+	var chainBytesFile string
+	var chainInfo fs.FileInfo
+	switch teeType {
+	default:
+		return nil, WorkloadConfig{}, fmt.Errorf("don't know how to generate TeeData for TEE type %q", teeType)
+	case SEV, SEV_NO_ES:
+		// If we need a certificate chain, get it.
+		chain, err := os.CreateTemp(options.TempDir, "chain")
+		if err != nil {
+			return nil, WorkloadConfig{}, err
+		}
+		chain.Close()
+		defer func() {
+			if err := os.Remove(chain.Name()); err != nil {
+				logger.Warnf("error removing temporary file %q: %v", chain.Name(), err)
+			}
+		}()
+		logrus.Debugf("sevctl export -f %s", chain.Name())
+		cmd := exec.Command("sevctl", "export", "-f", chain.Name())
+		var stdout, stderr bytes.Buffer
+		cmd.Stdout, cmd.Stderr = &stdout, &stderr
+		if err := cmd.Run(); err != nil {
+			if !options.IgnoreAttestationErrors {
+				return nil, WorkloadConfig{}, chainRetrievalError{stderr.String(), err}
+			}
+			logger.Warn(chainRetrievalError{stderr.String(), err}.Error())
+		}
+		if chainBytes, err = os.ReadFile(chain.Name()); err != nil {
+			chainBytes = []byte{}
+		}
+		var teeData SevWorkloadData
+		if len(chainBytes) > 0 {
+			chainBytesFile = "sev.chain"
+			chainInfo, err = os.Stat(chain.Name())
+			if err != nil {
+				return nil, WorkloadConfig{}, err
+			}
+			teeData.VendorChain = "/" + chainBytesFile
+		}
+		encodedTeeData, err := json.Marshal(teeData)
+		if err != nil {
+			return nil, WorkloadConfig{}, fmt.Errorf("encoding tee data: %w", err)
+		}
+		workloadConfig.TeeData = string(encodedTeeData)
+	case SNP:
+		teeData := SnpWorkloadData{
+			Generation: "milan",
+		}
+		encodedTeeData, err := json.Marshal(teeData)
+		if err != nil {
+			return nil, WorkloadConfig{}, fmt.Errorf("encoding tee data: %w", err)
+		}
+		workloadConfig.TeeData = string(encodedTeeData)
+	}
+
+	// Write part of the config blob where the krun init process will be
+	// looking for it.  The oci2cw tool used `buildah inspect` output, but
+	// init is just looking for fields that have the right names in any
+	// object, and the image's config will have that, so let's try encoding
+	// it directly.
+	krunConfigPath := filepath.Join(path, ".krun_config.json")
+	krunConfigBytes, err := json.Marshal(ociConfig)
+	if err != nil {
+		return nil, WorkloadConfig{}, fmt.Errorf("creating .krun_config from image configuration: %w", err)
+	}
+	if err := ioutils.AtomicWriteFile(krunConfigPath, krunConfigBytes, 0o600); err != nil {
+		return nil, WorkloadConfig{}, fmt.Errorf("saving krun config: %w", err)
+	}
+	defer func() {
+		if err := os.Remove(krunConfigPath); err != nil {
+			logger.Warnf("removing krun configuration file: %v", err)
+		}
+	}()
+
+	// Encode the workload config, in case it fails for any reason.
+	cleanedUpWorkloadConfig := workloadConfig
+	switch cleanedUpWorkloadConfig.Type {
+	default:
+		return nil, WorkloadConfig{}, fmt.Errorf("don't know how to canonicalize TEE type %q", cleanedUpWorkloadConfig.Type)
+	case SEV, SEV_NO_ES:
+		cleanedUpWorkloadConfig.Type = SEV
+	case SNP:
+		cleanedUpWorkloadConfig.Type = SNP
+	}
+	workloadConfigBytes, err := json.Marshal(cleanedUpWorkloadConfig)
+	if err != nil {
+		return nil, WorkloadConfig{}, err
+	}
+
+	// Make sure we have the passphrase to use for encrypting the disk image.
+	diskEncryptionPassphrase := options.DiskEncryptionPassphrase
+	if diskEncryptionPassphrase == "" {
+		diskEncryptionPassphrase, err = GenerateDiskEncryptionPassphrase()
+		if err != nil {
+			return nil, WorkloadConfig{}, err
+		}
+	}
+
+	// If we weren't told how big the image should be, get a rough estimate
+	// of the input data size, then add a hedge to it.
+	imageSize := slop(options.ImageSize, options.Slop)
+	if imageSize == 0 {
+		var sourceSize int64
+		if err := filepath.WalkDir(path, func(path string, d fs.DirEntry, err error) error {
+			if err != nil && !errors.Is(err, os.ErrNotExist) && !errors.Is(err, os.ErrPermission) {
+				return err
+			}
+			info, err := d.Info()
+			if err != nil && !errors.Is(err, os.ErrNotExist) && !errors.Is(err, os.ErrPermission) {
+				return err
+			}
+			sourceSize += info.Size()
+			return nil
+		}); err != nil {
+			return nil, WorkloadConfig{}, err
+		}
+		imageSize = slop(sourceSize, options.Slop)
+	}
+	if imageSize%4096 != 0 {
+		imageSize += (4096 - (imageSize % 4096))
+	}
+	if imageSize < minimumImageSize {
+		imageSize = minimumImageSize
+	}
+
+	// Create a file to use as the unencrypted version of the disk image.
+	plain, err := os.CreateTemp(options.TempDir, "plain.img")
+	if err != nil {
+		return nil, WorkloadConfig{}, err
+	}
+	removePlain := true
+	defer func() {
+		if removePlain {
+			if err := os.Remove(plain.Name()); err != nil {
+				logger.Warnf("removing temporary file %q: %v", plain.Name(), err)
+			}
+		}
+	}()
+
+	// Lengthen the plaintext disk image file.
+	if err := plain.Truncate(imageSize); err != nil {
+		plain.Close()
+		return nil, WorkloadConfig{}, err
+	}
+	plainInfo, err := plain.Stat()
+	plain.Close()
+	if err != nil {
+		return nil, WorkloadConfig{}, err
+	}
+
+	// Format the disk image with the filesystem contents.
+	if _, stderr, err := MakeFS(path, plain.Name(), filesystem); err != nil {
+		if strings.TrimSpace(stderr) != "" {
+			return nil, WorkloadConfig{}, fmt.Errorf("%s: %w", strings.TrimSpace(stderr), err)
+		}
+		return nil, WorkloadConfig{}, err
+	}
+
+	// If we're registering the workload, we can do that now.
+	if workloadConfig.AttestationURL != "" {
+		if err := SendRegistrationRequest(workloadConfig, diskEncryptionPassphrase, options.FirmwareLibrary, options.IgnoreAttestationErrors, logger); err != nil {
+			return nil, WorkloadConfig{}, err
+		}
+	}
+
+	// Try to encrypt on the fly.
+	pipeReader, pipeWriter := io.Pipe()
+	removePlain = false
+	go func() {
+		var err error
+		defer func() {
+			if err := os.Remove(plain.Name()); err != nil {
+				logger.Warnf("removing temporary file %q: %v", plain.Name(), err)
+			}
+			if err != nil {
+				pipeWriter.CloseWithError(err)
+			} else {
+				pipeWriter.Close()
+			}
+		}()
+		plain, err := os.Open(plain.Name())
+		if err != nil {
+			logrus.Errorf("opening unencrypted disk image %q: %v", plain.Name(), err)
+			return
+		}
+		defer plain.Close()
+		tw := tar.NewWriter(pipeWriter)
+		defer tw.Flush()
+
+		// Write /entrypoint
+		var decompressedEntrypoint bytes.Buffer
+		decompressor, err := gzip.NewReader(bytes.NewReader(entrypointCompressedBytes))
+		if err != nil {
+			logrus.Errorf("decompressing copy of entrypoint: %v", err)
+			return
+		}
+		defer decompressor.Close()
+		if _, err = io.Copy(&decompressedEntrypoint, decompressor); err != nil {
+			logrus.Errorf("decompressing copy of entrypoint: %v", err)
+			return
+		}
+		entrypointHeader, err := tar.FileInfoHeader(plainInfo, "")
+		if err != nil {
+			logrus.Errorf("building header for entrypoint: %v", err)
+			return
+		}
+		entrypointHeader.Name = "entrypoint"
+		entrypointHeader.Mode = 0o755
+		entrypointHeader.Uname, entrypointHeader.Gname = "", ""
+		entrypointHeader.Uid, entrypointHeader.Gid = 0, 0
+		entrypointHeader.Size = int64(decompressedEntrypoint.Len())
+		if err = tw.WriteHeader(entrypointHeader); err != nil {
+			logrus.Errorf("writing header for %q: %v", entrypointHeader.Name, err)
+			return
+		}
+		if _, err = io.Copy(tw, &decompressedEntrypoint); err != nil {
+			logrus.Errorf("writing %q: %v", entrypointHeader.Name, err)
+			return
+		}
+
+		// Write /sev.chain
+		if chainInfo != nil {
+			chainHeader, err := tar.FileInfoHeader(chainInfo, "")
+			if err != nil {
+				logrus.Errorf("building header for %q: %v", chainInfo.Name(), err)
+				return
+			}
+			chainHeader.Name = chainBytesFile
+			chainHeader.Mode = 0o600
+			chainHeader.Uname, chainHeader.Gname = "", ""
+			chainHeader.Uid, chainHeader.Gid = 0, 0
+			chainHeader.Size = int64(len(chainBytes))
+			if err = tw.WriteHeader(chainHeader); err != nil {
+				logrus.Errorf("writing header for %q: %v", chainHeader.Name, err)
+				return
+			}
+			if _, err = tw.Write(chainBytes); err != nil {
+				logrus.Errorf("writing %q: %v", chainHeader.Name, err)
+				return
+			}
+		}
+
+		// Write /krun-sev.json.
+		workloadConfigHeader, err := tar.FileInfoHeader(plainInfo, "")
+		if err != nil {
+			logrus.Errorf("building header for %q: %v", plainInfo.Name(), err)
+			return
+		}
+		workloadConfigHeader.Name = "krun-sev.json"
+		workloadConfigHeader.Mode = 0o600
+		workloadConfigHeader.Uname, workloadConfigHeader.Gname = "", ""
+		workloadConfigHeader.Uid, workloadConfigHeader.Gid = 0, 0
+		workloadConfigHeader.Size = int64(len(workloadConfigBytes))
+		if err = tw.WriteHeader(workloadConfigHeader); err != nil {
+			logrus.Errorf("writing header for %q: %v", workloadConfigHeader.Name, err)
+			return
+		}
+		if _, err = tw.Write(workloadConfigBytes); err != nil {
+			logrus.Errorf("writing %q: %v", workloadConfigHeader.Name, err)
+			return
+		}
+
+		// Write /tmp.
+		tmpHeader, err := tar.FileInfoHeader(plainInfo, "")
+		if err != nil {
+			logrus.Errorf("building header for %q: %v", plainInfo.Name(), err)
+			return
+		}
+		tmpHeader.Name = "tmp/"
+		tmpHeader.Typeflag = tar.TypeDir
+		tmpHeader.Mode = 0o1777
+		tmpHeader.Uname, workloadConfigHeader.Gname = "", ""
+		tmpHeader.Uid, workloadConfigHeader.Gid = 0, 0
+		tmpHeader.Size = 0
+		if err = tw.WriteHeader(tmpHeader); err != nil {
+			logrus.Errorf("writing header for %q: %v", tmpHeader.Name, err)
+			return
+		}
+
+		// Now figure out the footer that we'll append to the encrypted disk.
+		var footer bytes.Buffer
+		lengthBuffer := make([]byte, 8)
+		footer.Write(workloadConfigBytes)
+		footer.WriteString("KRUN")
+		binary.LittleEndian.PutUint64(lengthBuffer, uint64(len(workloadConfigBytes)))
+		footer.Write(lengthBuffer)
+
+		// Start encrypting and write /disk.img.
+		header, encrypt, blockSize, err := luksy.EncryptV1([]string{diskEncryptionPassphrase}, "")
+		paddingBoundary := int64(4096)
+		paddingNeeded := (paddingBoundary - ((int64(len(header)) + imageSize + int64(footer.Len())) % paddingBoundary)) % paddingBoundary
+		diskHeader := workloadConfigHeader
+		diskHeader.Name = "disk.img"
+		diskHeader.Mode = 0o600
+		diskHeader.Size = int64(len(header)) + imageSize + paddingNeeded + int64(footer.Len())
+		if err = tw.WriteHeader(diskHeader); err != nil {
+			logrus.Errorf("writing archive header for disk.img: %v", err)
+			return
+		}
+		if _, err = io.Copy(tw, bytes.NewReader(header)); err != nil {
+			logrus.Errorf("writing encryption header for disk.img: %v", err)
+			return
+		}
+		encryptWrapper := luksy.EncryptWriter(encrypt, tw, blockSize)
+		if _, err = io.Copy(encryptWrapper, plain); err != nil {
+			logrus.Errorf("encrypting disk.img: %v", err)
+			return
+		}
+		encryptWrapper.Close()
+		if _, err = tw.Write(make([]byte, paddingNeeded)); err != nil {
+			logrus.Errorf("writing padding for disk.img: %v", err)
+			return
+		}
+		if _, err = io.Copy(tw, &footer); err != nil {
+			logrus.Errorf("writing footer for disk.img: %v", err)
+			return
+		}
+		tw.Close()
+	}()
+
+	return pipeReader, workloadConfig, nil
+}
+
+func slop(size int64, slop string) int64 {
+	if slop == "" {
+		return size * 5 / 4
+	}
+	for _, factor := range strings.Split(slop, "+") {
+		factor = strings.TrimSpace(factor)
+		if factor == "" {
+			continue
+		}
+		if strings.HasSuffix(factor, "%") {
+			percentage := strings.TrimSuffix(factor, "%")
+			percent, err := strconv.ParseInt(percentage, 10, 8)
+			if err != nil {
+				logrus.Warnf("parsing percentage %q: %v", factor, err)
+			} else {
+				size *= (percent + 100)
+				size /= 100
+			}
+		} else {
+			more, err := units.RAMInBytes(factor)
+			if err != nil {
+				logrus.Warnf("parsing %q as a size: %v", factor, err)
+			} else {
+				size += more
+			}
+		}
+	}
+	return size
+}

internal/mkcw/archive_test.go

@@ -0,0 +1,181 @@
+package mkcw
+
+import (
+	"archive/tar"
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sync"
+	"testing"
+
+	v1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSlop(t *testing.T) {
+	testCases := []struct {
+		input  int64
+		slop   string
+		output int64
+	}{
+		{100, "", 125},
+		{100, "10%", 110},
+		{100, "100%", 200},
+		{100, "10GB", 10*1024*1024*1024 + 100},
+		{100, "10%+10GB", 10*1024*1024*1024 + 110},
+		{100, "10% + 10GB", 10*1024*1024*1024 + 110},
+	}
+	for _, testCase := range testCases {
+		t.Run(testCase.slop, func(t *testing.T) {
+			assert.Equal(t, testCase.output, slop(testCase.input, testCase.slop))
+		})
+	}
+}
+
+// dummyAttestationHandler replies with a fixed response code to requests to
+// the right path, and caches passphrases indexed by workload ID
+type dummyAttestationHandler struct {
+	t               *testing.T
+	status          int
+	passphrases     map[string]string
+	passphrasesLock sync.Mutex
+}
+
+func (d *dummyAttestationHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+	var body bytes.Buffer
+	if req.Body != nil {
+		if _, err := io.Copy(&body, req.Body); err != nil {
+			d.t.Logf("reading request body: %v", err)
+			return
+		}
+		req.Body.Close()
+	}
+	if req.URL != nil && req.URL.Path == "/kbs/v0/register_workload" {
+		var registrationRequest RegistrationRequest
+		// if we can't decode the client request, bail
+		if err := json.Unmarshal(body.Bytes(), &registrationRequest); err != nil {
+			rw.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		// cache the passphrase
+		d.passphrasesLock.Lock()
+		if d.passphrases == nil {
+			d.passphrases = make(map[string]string)
+		}
+		d.passphrases[registrationRequest.WorkloadID] = registrationRequest.Passphrase
+		d.passphrasesLock.Unlock()
+		// return the predetermined status
+		status := d.status
+		if status == 0 {
+			status = http.StatusOK
+		}
+		rw.WriteHeader(status)
+		return
+	}
+	// no such handler
+	rw.WriteHeader(http.StatusInternalServerError)
+}
+
+func TestArchive(t *testing.T) {
+	ociConfig := &v1.Image{
+		Config: v1.ImageConfig{
+			User:       "root",
+			Env:        []string{"PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/usr/sbin:/sbin:/usr/sbin:/sbin"},
+			Cmd:        []string{"/bin/bash"},
+			WorkingDir: "/root",
+			Labels: map[string]string{
+				"label_a": "b",
+				"label_c": "d",
+			},
+		},
+	}
+	for _, status := range []int{http.StatusOK, http.StatusInternalServerError} {
+		for _, ignoreChainRetrievalErrors := range []bool{false, true} {
+			for _, ignoreAttestationErrors := range []bool{false, true} {
+				t.Run(fmt.Sprintf("status=%d,ignoreChainRetrievalErrors=%v,ignoreAttestationErrors=%v", status, ignoreChainRetrievalErrors, ignoreAttestationErrors), func(t *testing.T) {
+					// listen on a system-assigned port
+					listener, err := net.Listen("tcp", ":0")
+					require.NoError(t, err)
+					// keep track of our listener address
+					addr := listener.Addr()
+					// serve requests on that listener
+					handler := &dummyAttestationHandler{t: t, status: status}
+					server := http.Server{
+						Handler: handler,
+					}
+					go func() {
+						if err := server.Serve(listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
+							t.Logf("serve: %v", err)
+						}
+					}()
+					// clean up at the end of this test
+					t.Cleanup(func() { assert.NoError(t, server.Close()) })
+					// generate the container rootfs using a temporary empty directory
+					archiveOptions := ArchiveOptions{
+						CPUs:                    4,
+						Memory:                  256,
+						TempDir:                 t.TempDir(),
+						AttestationURL:          "http://" + addr.String(),
+						IgnoreAttestationErrors: ignoreAttestationErrors,
+					}
+					inputPath := t.TempDir()
+					rc, workloadConfig, err := Archive(inputPath, ociConfig, archiveOptions)
+					// bail now if we got an error we didn't expect
+					if err != nil {
+						if errors.As(err, &chainRetrievalError{}) {
+							if !ignoreChainRetrievalErrors {
+								return
+							}
+						}
+						if errors.As(err, &attestationError{}) {
+							if !ignoreAttestationErrors {
+								require.NoError(t, err)
+							}
+						}
+						return
+					}
+					if err == nil {
+						defer rc.Close()
+					}
+					// read each archive entry's contents into a map
+					contents := make(map[string][]byte)
+					tr := tar.NewReader(rc)
+					hdr, err := tr.Next()
+					for hdr != nil {
+						contents[hdr.Name], err = io.ReadAll(tr)
+						require.NoError(t, err)
+						hdr, err = tr.Next()
+					}
+					if err != nil {
+						require.ErrorIs(t, err, io.EOF)
+					}
+					// check that krun-sev.json is a JSON-encoded copy of the workload config
+					var writtenWorkloadConfig WorkloadConfig
+					err = json.Unmarshal(contents["krun-sev.json"], &writtenWorkloadConfig)
+					require.NoError(t, err)
+					assert.Equal(t, workloadConfig, writtenWorkloadConfig)
+					// save the disk image to a file
+					encryptedFile := filepath.Join(t.TempDir(), "encrypted.img")
+					err = os.WriteFile(encryptedFile, contents["disk.img"], 0o600)
+					require.NoError(t, err)
+					// check that we have a configuration footer in there
+					_, err = ReadWorkloadConfigFromImage(encryptedFile)
+					require.NoError(t, err)
+					// check that the attestation server got the encryption passphrase
+					handler.passphrasesLock.Lock()
+					passphrase := handler.passphrases[workloadConfig.WorkloadID]
+					handler.passphrasesLock.Unlock()
+					err = CheckLUKSPassphrase(encryptedFile, passphrase)
+					require.NoError(t, err)
+				})
+			}
+		}
+	}
+}

internal/mkcw/attest.go

@@ -0,0 +1,250 @@
+package mkcw
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/containers/buildah/internal/mkcw/types"
+	"github.com/sirupsen/logrus"
+)
+
+type (
+	RegistrationRequest = types.RegistrationRequest
+	TeeConfig           = types.TeeConfig
+	TeeConfigFlags      = types.TeeConfigFlags
+	TeeConfigMinFW      = types.TeeConfigMinFW
+)
+
+type measurementError struct {
+	err error
+}
+
+func (m measurementError) Error() string {
+	return fmt.Sprintf("generating measurement for attestation: %v", m.err)
+}
+
+type attestationError struct {
+	err error
+}
+
+func (a attestationError) Error() string {
+	return fmt.Sprintf("registering workload: %v", a.err)
+}
+
+type httpError struct {
+	statusCode int
+}
+
+func (h httpError) Error() string {
+	if statusText := http.StatusText(h.statusCode); statusText != "" {
+		return fmt.Sprintf("received server status %d (%q)", h.statusCode, statusText)
+	}
+	return fmt.Sprintf("received server status %d", h.statusCode)
+}
+
+// SendRegistrationRequest registers a workload with the specified decryption
+// passphrase with the service whose location is part of the WorkloadConfig.
+func SendRegistrationRequest(workloadConfig WorkloadConfig, diskEncryptionPassphrase, firmwareLibrary string, ignoreAttestationErrors bool, logger *logrus.Logger) error {
+	if workloadConfig.AttestationURL == "" {
+		return errors.New("attestation URL not provided")
+	}
+
+	// Measure the execution environment.
+	measurement, err := GenerateMeasurement(workloadConfig, firmwareLibrary)
+	if err != nil {
+		if !ignoreAttestationErrors {
+			return &measurementError{err}
+		}
+		logger.Warnf("generating measurement for attestation: %v", err)
+	}
+
+	// Build the workload registration (attestation) request body.
+	var teeConfigBytes []byte
+	switch workloadConfig.Type {
+	case SEV, SEV_NO_ES, SNP:
+		var cbits types.TeeConfigFlagBits
+		switch workloadConfig.Type {
+		case SEV:
+			cbits = types.SEV_CONFIG_NO_DEBUG |
+				types.SEV_CONFIG_NO_KEY_SHARING |
+				types.SEV_CONFIG_ENCRYPTED_STATE |
+				types.SEV_CONFIG_NO_SEND |
+				types.SEV_CONFIG_DOMAIN |
+				types.SEV_CONFIG_SEV
+		case SEV_NO_ES:
+			cbits = types.SEV_CONFIG_NO_DEBUG |
+				types.SEV_CONFIG_NO_KEY_SHARING |
+				types.SEV_CONFIG_NO_SEND |
+				types.SEV_CONFIG_DOMAIN |
+				types.SEV_CONFIG_SEV
+		case SNP:
+			cbits = types.SNP_CONFIG_SMT |
+				types.SNP_CONFIG_MANDATORY |
+				types.SNP_CONFIG_MIGRATE_MA |
+				types.SNP_CONFIG_DEBUG
+		default:
+			panic("internal error") // shouldn't happen
+		}
+		teeConfig := TeeConfig{
+			Flags: TeeConfigFlags{
+				Bits: cbits,
+			},
+			MinFW: TeeConfigMinFW{
+				Major: 0,
+				Minor: 0,
+			},
+		}
+		teeConfigBytes, err = json.Marshal(teeConfig)
+		if err != nil {
+			return err
+		}
+	default:
+		return fmt.Errorf("don't know how to generate tee_config for %q TEEs", workloadConfig.Type)
+	}
+
+	registrationRequest := RegistrationRequest{
+		WorkloadID:        workloadConfig.WorkloadID,
+		LaunchMeasurement: measurement,
+		TeeConfig:         string(teeConfigBytes),
+		Passphrase:        diskEncryptionPassphrase,
+	}
+	registrationRequestBytes, err := json.Marshal(registrationRequest)
+	if err != nil {
+		return err
+	}
+
+	// Register the workload.
+	parsedURL, err := url.Parse(workloadConfig.AttestationURL)
+	if err != nil {
+		return err
+	}
+	parsedURL.Path = path.Join(parsedURL.Path, "/kbs/v0/register_workload")
+	if err != nil {
+		return err
+	}
+	url := parsedURL.String()
+	requestContentType := "application/json"
+	requestBody := bytes.NewReader(registrationRequestBytes)
+	defer http.DefaultClient.CloseIdleConnections()
+	resp, err := http.Post(url, requestContentType, requestBody)
+	if resp != nil {
+		if resp.Body != nil {
+			resp.Body.Close()
+		}
+		switch resp.StatusCode {
+		default:
+			if !ignoreAttestationErrors {
+				return &attestationError{&httpError{resp.StatusCode}}
+			}
+			logger.Warn(attestationError{&httpError{resp.StatusCode}}.Error())
+		case http.StatusOK, http.StatusAccepted:
+			// great!
+		}
+	}
+	if err != nil {
+		if !ignoreAttestationErrors {
+			return &attestationError{err}
+		}
+		logger.Warn(attestationError{err}.Error())
+	}
+	return nil
+}
+
+// GenerateMeasurement generates the runtime measurement using the CPU count,
+// memory size, and the firmware shared library, whatever it's called, wherever
+// it is.
+// If firmwareLibrary is a path, it will be the only one checked.
+// If firmwareLibrary is a filename, it will be checked for in a hard-coded set
+// of directories.
+// If firmwareLibrary is empty, both the filename and the directory it is in
+// will be taken from a hard-coded set of candidates.
+func GenerateMeasurement(workloadConfig WorkloadConfig, firmwareLibrary string) (string, error) {
+	cpuString := fmt.Sprintf("%d", workloadConfig.CPUs)
+	memoryString := fmt.Sprintf("%d", workloadConfig.Memory)
+	var prefix string
+	switch workloadConfig.Type {
+	case SEV:
+		prefix = "SEV-ES"
+	case SEV_NO_ES:
+		prefix = "SEV"
+	case SNP:
+		prefix = "SNP"
+	default:
+		return "", fmt.Errorf("don't know which measurement to use for TEE type %q", workloadConfig.Type)
+	}
+
+	sharedLibraryDirs := []string{
+		"/usr/local/lib64",
+		"/usr/local/lib",
+		"/lib64",
+		"/lib",
+		"/usr/lib64",
+		"/usr/lib",
+	}
+	if llp, ok := os.LookupEnv("LD_LIBRARY_PATH"); ok {
+		sharedLibraryDirs = append(sharedLibraryDirs, strings.Split(llp, ":")...)
+	}
+	libkrunfwNames := []string{
+		"libkrunfw-sev.so.4",
+		"libkrunfw-sev.so.3",
+		"libkrunfw-sev.so",
+	}
+	var pathsToCheck []string
+	if firmwareLibrary == "" {
+		for _, sharedLibraryDir := range sharedLibraryDirs {
+			if sharedLibraryDir == "" {
+				continue
+			}
+			for _, libkrunfw := range libkrunfwNames {
+				candidate := filepath.Join(sharedLibraryDir, libkrunfw)
+				pathsToCheck = append(pathsToCheck, candidate)
+			}
+		}
+	} else {
+		if filepath.IsAbs(firmwareLibrary) {
+			pathsToCheck = append(pathsToCheck, firmwareLibrary)
+		} else {
+			for _, sharedLibraryDir := range sharedLibraryDirs {
+				if sharedLibraryDir == "" {
+					continue
+				}
+				candidate := filepath.Join(sharedLibraryDir, firmwareLibrary)
+				pathsToCheck = append(pathsToCheck, candidate)
+			}
+		}
+	}
+	for _, candidate := range pathsToCheck {
+		if _, err := os.Lstat(candidate); err == nil {
+			var stdout, stderr bytes.Buffer
+			logrus.Debugf("krunfw_measurement -c %s -m %s %s", cpuString, memoryString, candidate)
+			cmd := exec.Command("krunfw_measurement", "-c", cpuString, "-m", memoryString, candidate)
+			cmd.Stdout = &stdout
+			cmd.Stderr = &stderr
+			if err := cmd.Run(); err != nil {
+				if stderr.Len() > 0 {
+					err = fmt.Errorf("krunfw_measurement: %s: %w", strings.TrimSpace(stderr.String()), err)
+				}
+				return "", err
+			}
+			scanner := bufio.NewScanner(&stdout)
+			for scanner.Scan() {
+				line := scanner.Text()
+				if strings.HasPrefix(line, prefix+":") {
+					return strings.TrimSpace(strings.TrimPrefix(line, prefix+":")), nil
+				}
+			}
+			return "", fmt.Errorf("generating measurement: no line starting with %q found in output from krunfw_measurement", prefix+":")
+		}
+	}
+	return "", fmt.Errorf("generating measurement: none of %v found: %w", pathsToCheck, os.ErrNotExist)
+}

internal/mkcw/embed/entrypoint.s

@@ -0,0 +1,16 @@
+	.section	.rodata.1,"aMS",@progbits,1
+msg:
+	.string	"This image is designed to be run as a confidential workload using libkrun.\n"
+	.section	.text._start,"ax",@progbits
+	.globl	_start
+	.type	_start,@function
+_start:
+	movq	$1, %rax   # write
+	movq	$2, %rdi   # fd=stderr_fileno
+	movq	$msg, %rsi # message
+	movq	$75, %rdx  # length
+	syscall
+	movq	$60, %rax  # exit
+	movq	$1, %rdi   # status=1
+	syscall
+	.section	.note.GNU-stack,"",@progbits

internal/mkcw/entrypoint.go

@@ -0,0 +1,6 @@
+package mkcw
+
+import _ "embed"
+
+//go:embed "embed/entrypoint.gz"
+var entrypointCompressedBytes []byte

internal/mkcw/luks.go

@@ -0,0 +1,51 @@
+package mkcw
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"os"
+
+	"github.com/containers/luksy"
+)
+
+// CheckLUKSPassphrase checks that the specified LUKS-encrypted file can be
+// decrypted using the specified passphrase.
+func CheckLUKSPassphrase(path, decryptionPassphrase string) error {
+	f, err := os.Open(path)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	v1header, v2headerA, v2headerB, v2json, err := luksy.ReadHeaders(f, luksy.ReadHeaderOptions{})
+	if err != nil {
+		return err
+	}
+	if v1header != nil {
+		_, _, _, _, err = v1header.Decrypt(decryptionPassphrase, f)
+		return err
+	}
+	if v2headerA == nil && v2headerB == nil {
+		return fmt.Errorf("no LUKS headers read from %q", path)
+	}
+	if v2headerA != nil {
+		if _, _, _, _, err = v2headerA.Decrypt(decryptionPassphrase, f, *v2json); err != nil {
+			return err
+		}
+	}
+	if v2headerB != nil {
+		if _, _, _, _, err = v2headerB.Decrypt(decryptionPassphrase, f, *v2json); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GenerateDiskEncryptionPassphrase generates a random disk encryption password
+func GenerateDiskEncryptionPassphrase() (string, error) {
+	randomizedBytes := make([]byte, 32)
+	if _, err := rand.Read(randomizedBytes); err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(randomizedBytes), nil
+}

internal/mkcw/luks_test.go

@@ -0,0 +1,66 @@
+package mkcw
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/containers/luksy"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCheckLUKSPassphrase(t *testing.T) {
+	passphrase, err := GenerateDiskEncryptionPassphrase()
+	require.NoError(t, err)
+	secondPassphrase, err := GenerateDiskEncryptionPassphrase()
+	require.NoError(t, err)
+
+	t.Run("v1", func(t *testing.T) {
+		header, encrypter, blockSize, err := luksy.EncryptV1([]string{secondPassphrase, passphrase}, "")
+		require.NoError(t, err)
+		f, err := os.Create(filepath.Join(t.TempDir(), "v1"))
+		require.NoError(t, err)
+		n, err := f.Write(header)
+		require.NoError(t, err)
+		require.Equal(t, len(header), n)
+		wrapper := luksy.EncryptWriter(encrypter, f, blockSize)
+		_, err = wrapper.Write(make([]byte, blockSize*10))
+		require.NoError(t, err)
+		wrapper.Close()
+		f.Close()
+
+		err = CheckLUKSPassphrase(f.Name(), passphrase)
+		require.NoError(t, err)
+		err = CheckLUKSPassphrase(f.Name(), secondPassphrase)
+		require.NoError(t, err)
+		err = CheckLUKSPassphrase(f.Name(), "nope, this is not a correct passphrase")
+		require.Error(t, err)
+	})
+
+	t.Run("v2", func(t *testing.T) {
+		for _, sectorSize := range []int{512, 1024, 2048, 4096} {
+			t.Run(fmt.Sprintf("sectorSize=%d", sectorSize), func(t *testing.T) {
+				header, encrypter, blockSize, err := luksy.EncryptV2([]string{secondPassphrase, passphrase}, "", sectorSize)
+				require.NoError(t, err)
+				f, err := os.Create(filepath.Join(t.TempDir(), "v2"))
+				require.NoError(t, err)
+				n, err := f.Write(header)
+				require.NoError(t, err)
+				require.Equal(t, len(header), n)
+				wrapper := luksy.EncryptWriter(encrypter, f, blockSize)
+				_, err = wrapper.Write(make([]byte, blockSize*10))
+				require.NoError(t, err)
+				wrapper.Close()
+				f.Close()
+
+				err = CheckLUKSPassphrase(f.Name(), passphrase)
+				require.NoError(t, err)
+				err = CheckLUKSPassphrase(f.Name(), secondPassphrase)
+				require.NoError(t, err)
+				err = CheckLUKSPassphrase(f.Name(), "nope, this is not one of the correct passphrases")
+				require.Error(t, err)
+			})
+		}
+	})
+}

internal/mkcw/makefs.go

@@ -0,0 +1,38 @@
+package mkcw
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+)
+
+// MakeFS formats the imageFile as a filesystem of the specified type,
+// populating it with the contents of the directory at sourcePath.
+// Recognized filesystem types are "ext2", "ext3", "ext4", and "btrfs".
+// Note that krun's init is currently hard-wired to assume "ext4".
+// Returns the stdout, stderr, and any error returned by the mkfs command.
+func MakeFS(sourcePath, imageFile, filesystem string) (string, string, error) {
+	var stdout, stderr strings.Builder
+	// N.B. mkfs.xfs can accept a protofile via its -p option, but the
+	// protofile format doesn't allow us to supply timestamp information or
+	// specify that files are hard linked
+	switch filesystem {
+	case "ext2", "ext3", "ext4":
+		logrus.Debugf("mkfs -t %s --rootdir %q %q", filesystem, sourcePath, imageFile)
+		cmd := exec.Command("mkfs", "-t", filesystem, "-d", sourcePath, imageFile)
+		cmd.Stdout = &stdout
+		cmd.Stderr = &stderr
+		err := cmd.Run()
+		return stdout.String(), stderr.String(), err
+	case "btrfs":
+		logrus.Debugf("mkfs -t %s --rootdir %q %q", filesystem, sourcePath, imageFile)
+		cmd := exec.Command("mkfs", "-t", filesystem, "--rootdir", sourcePath, imageFile)
+		cmd.Stdout = &stdout
+		cmd.Stderr = &stderr
+		err := cmd.Run()
+		return stdout.String(), stderr.String(), err
+	}
+	return "", "", fmt.Errorf("don't know how to make a %q filesystem with contents", filesystem)
+}

internal/mkcw/types/attest.go

@@ -0,0 +1,47 @@
+package types
+
+// RegistrationRequest is the body of the request which we use for registering
+// this confidential workload with the attestation server.
+// https://github.com/virtee/reference-kbs/blob/10b2a4c0f8caf78a077210b172863bbae54f66aa/src/main.rs#L83
+type RegistrationRequest struct {
+	WorkloadID        string `json:"workload_id"`
+	LaunchMeasurement string `json:"launch_measurement"`
+	Passphrase        string `json:"passphrase"`
+	TeeConfig         string `json:"tee_config"` // JSON-encoded teeConfig? or specific to the type of TEE?
+}
+
+// TeeConfig contains information about a trusted execution environment.
+type TeeConfig struct {
+	Flags TeeConfigFlags `json:"flags"` // runtime requirement bits
+	MinFW TeeConfigMinFW `json:"minfw"` // minimum platform firmware version
+}
+
+// TeeConfigFlags is a bit field containing policy flags specific to the environment.
+// https://github.com/virtee/sev/blob/d3e40917fd8531c69f47c2498e9667fe8a5303aa/src/launch/sev.rs#L172
+// https://github.com/virtee/sev/blob/d3e40917fd8531c69f47c2498e9667fe8a5303aa/src/launch/snp.rs#L114
+type TeeConfigFlags struct {
+	Bits TeeConfigFlagBits `json:"bits"`
+}
+
+// TeeConfigFlagBits are bits representing run-time expectations.
+type TeeConfigFlagBits int
+
+const (
+	SEV_CONFIG_NO_DEBUG        TeeConfigFlagBits = 0b00000001 //revive:disable-line:var-naming no debugging of guests
+	SEV_CONFIG_NO_KEY_SHARING  TeeConfigFlagBits = 0b00000010 //revive:disable-line:var-naming no sharing keys between guests
+	SEV_CONFIG_ENCRYPTED_STATE TeeConfigFlagBits = 0b00000100 //revive:disable-line:var-naming requires SEV-ES
+	SEV_CONFIG_NO_SEND         TeeConfigFlagBits = 0b00001000 //revive:disable-line:var-naming no transferring the guest to another platform
+	SEV_CONFIG_DOMAIN          TeeConfigFlagBits = 0b00010000 //revive:disable-line:var-naming no transferring the guest out of the domain (?)
+	SEV_CONFIG_SEV             TeeConfigFlagBits = 0b00100000 //revive:disable-line:var-naming no transferring the guest to non-SEV platforms
+	SNP_CONFIG_SMT             TeeConfigFlagBits = 0b00000001 //revive:disable-line:var-naming SMT is enabled on the host machine
+	SNP_CONFIG_MANDATORY       TeeConfigFlagBits = 0b00000010 //revive:disable-line:var-naming reserved bit which should always be set
+	SNP_CONFIG_MIGRATE_MA      TeeConfigFlagBits = 0b00000100 //revive:disable-line:var-naming allowed to use a migration agent
+	SNP_CONFIG_DEBUG           TeeConfigFlagBits = 0b00001000 //revive:disable-line:var-naming allow debugging
+)
+
+// TeeConfigFlagMinFW corresponds to a minimum version of the kernel+initrd
+// combination that should be booted.
+type TeeConfigMinFW struct {
+	Major int `json:"major"`
+	Minor int `json:"minor"`
+}

internal/mkcw/types/workload.go

@@ -0,0 +1,34 @@
+package types
+
+import "github.com/containers/buildah/define"
+
+// WorkloadConfig is the data type which is encoded and stored in /krun-sev.json in a container
+// image, and included directly in the disk image.
+// https://github.com/containers/libkrun/blob/57c59dc5359bdeeb8260b3493e9f63d3708f9ab9/src/vmm/src/resources.rs#L57
+type WorkloadConfig struct {
+	Type           define.TeeType `json:"tee"`
+	TeeData        string         `json:"tee_data"` // Type == SEV: JSON-encoded SevWorkloadData, SNP: JSON-encoded SnpWorkloadData, others?
+	WorkloadID     string         `json:"workload_id"`
+	CPUs           int            `json:"cpus"`
+	Memory         int            `json:"ram_mib"`
+	AttestationURL string         `json:"attestation_url"`
+}
+
+// SevWorkloadData contains the path to the SEV certificate chain and optionally,
+// the attestation server's public key(?)
+// https://github.com/containers/libkrun/blob/d31747aa92cf83df2abaeb87e2a83311c135d003/src/vmm/src/linux/tee/amdsev.rs#L222
+type SevWorkloadData struct {
+	VendorChain             string `json:"vendor_chain"`
+	AttestationServerPubkey string `json:"attestation_server_pubkey"`
+}
+
+// SnpWorkloadData contains the required CPU generation name.
+// https://github.com/virtee/oci2cw/blob/1502d5be33c2fa82d49aaa95781bbab2aa932781/examples/tee-config-snp.json
+type SnpWorkloadData struct {
+	Generation string `json:"gen"` // "milan" (naples=1, rome=2, milan=3, genoa/bergamo=4)
+}
+
+const (
+	// SEV_NO_ES is a known trusted execution environment type: AMD-SEV (secure encrypted virtualization without encrypted state, requires epyc 1000 "naples")
+	SEV_NO_ES define.TeeType = "sev_no_es" //revive:disable-line:var-naming
+)

internal/mkcw/workload.go

@@ -0,0 +1,223 @@
+package mkcw
+
+import (
+	"bytes"
+	"encoding/binary"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/containers/buildah/define"
+	"github.com/containers/buildah/internal/mkcw/types"
+)
+
+type (
+	// WorkloadConfig is the data type which is encoded and stored in an image.
+	WorkloadConfig = types.WorkloadConfig
+	// SevWorkloadData is the type of data in WorkloadConfig.TeeData when the type is SEV.
+	SevWorkloadData = types.SevWorkloadData
+	// SnpWorkloadData is the type of data in WorkloadConfig.TeeData when the type is SNP.
+	SnpWorkloadData = types.SnpWorkloadData
+	// TeeType is one of the known types of trusted execution environments for which we
+	// can generate suitable image contents.
+	TeeType = define.TeeType
+)
+
+const (
+	maxWorkloadConfigSize    = 1024 * 1024
+	preferredPaddingBoundary = 4096
+	// SEV is a known trusted execution environment type: AMD-SEV
+	SEV = define.SEV
+	// SEV_NO_ES is a known trusted execution environment type: AMD-SEV without encrypted state
+	SEV_NO_ES = types.SEV_NO_ES //revive:disable-line:var-naming
+	// SNP is a known trusted execution environment type: AMD-SNP
+	SNP = define.SNP
+	// krun looks for its configuration JSON directly in a disk image if the last twelve bytes
+	// of the disk image are this magic  value followed by a little-endian 64-bit
+	// length-of-the-configuration
+	krunMagic = "KRUN"
+)
+
+// ReadWorkloadConfigFromImage reads the workload configuration from the
+// specified disk image file
+func ReadWorkloadConfigFromImage(path string) (WorkloadConfig, error) {
+	// Read the last 12 bytes, which should be "KRUN" followed by a 64-bit
+	// little-endian length.  The (length) bytes immediately preceding
+	// these hold the JSON-encoded workloadConfig.
+	var wc WorkloadConfig
+	f, err := os.Open(path)
+	if err != nil {
+		return wc, err
+	}
+	defer f.Close()
+
+	// Read those last 12 bytes.
+	finalTwelve := make([]byte, 12)
+	if _, err = f.Seek(-12, io.SeekEnd); err != nil {
+		return wc, fmt.Errorf("checking for workload config signature: %w", err)
+	}
+	if n, err := f.Read(finalTwelve); err != nil || n != len(finalTwelve) {
+		if err != nil && !errors.Is(err, io.EOF) {
+			return wc, fmt.Errorf("reading workload config signature (%d bytes read): %w", n, err)
+		}
+		if n != len(finalTwelve) {
+			return wc, fmt.Errorf("short read (expected 12 bytes at the end of %q, got %d)", path, n)
+		}
+	}
+	if magic := string(finalTwelve[0:4]); magic != "KRUN" {
+		return wc, fmt.Errorf("expected magic string KRUN in %q, found %q)", path, magic)
+	}
+	length := binary.LittleEndian.Uint64(finalTwelve[4:])
+	if length > maxWorkloadConfigSize {
+		return wc, fmt.Errorf("workload config in %q is %d bytes long, which seems unreasonable (max allowed %d)", path, length, maxWorkloadConfigSize)
+	}
+
+	// Read and decode the config.
+	configBytes := make([]byte, length)
+	if _, err = f.Seek(-(int64(length) + 12), io.SeekEnd); err != nil {
+		return wc, fmt.Errorf("looking for workload config from disk image: %w", err)
+	}
+	if n, err := f.Read(configBytes); err != nil || n != len(configBytes) {
+		if err != nil {
+			return wc, fmt.Errorf("reading workload config from disk image: %w", err)
+		}
+		return wc, fmt.Errorf("short read (expected %d bytes near the end of %q, got %d)", len(configBytes), path, n)
+	}
+	err = json.Unmarshal(configBytes, &wc)
+	if err != nil {
+		err = fmt.Errorf("unmarshaling configuration %q: %w", string(configBytes), err)
+	}
+	return wc, err
+}
+
+// WriteWorkloadConfigToImage writes the workload configuration to the
+// specified disk image file, overwriting a previous configuration if it's
+// asked to and it finds one
+func WriteWorkloadConfigToImage(imageFile *os.File, workloadConfigBytes []byte, overwrite bool) error {
+	// Read those last 12 bytes to check if there's a configuration there already, which we should overwrite.
+	var overwriteOffset int64
+	if overwrite {
+		finalTwelve := make([]byte, 12)
+		if _, err := imageFile.Seek(-12, io.SeekEnd); err != nil {
+			return fmt.Errorf("checking for workload config signature: %w", err)
+		}
+		if n, err := imageFile.Read(finalTwelve); err != nil || n != len(finalTwelve) {
+			if err != nil && !errors.Is(err, io.EOF) {
+				return fmt.Errorf("reading workload config signature (%d bytes read): %w", n, err)
+			}
+			if n != len(finalTwelve) {
+				return fmt.Errorf("short read (expected 12 bytes at the end of %q, got %d)", imageFile.Name(), n)
+			}
+		}
+		if magic := string(finalTwelve[0:4]); magic == "KRUN" {
+			length := binary.LittleEndian.Uint64(finalTwelve[4:])
+			if length < maxWorkloadConfigSize {
+				overwriteOffset = int64(length + 12)
+			}
+		}
+	}
+	// If we found a configuration in the file, try to figure out how much padding was used.
+	paddingSize := int64(preferredPaddingBoundary)
+	if overwriteOffset != 0 {
+		st, err := imageFile.Stat()
+		if err != nil {
+			return err
+		}
+		for _, possiblePaddingLength := range []int64{0x100000, 0x10000, 0x1000, 0x200, 0x100} {
+			if overwriteOffset > possiblePaddingLength {
+				continue
+			}
+			if st.Size()%possiblePaddingLength != 0 {
+				continue
+			}
+			if _, err := imageFile.Seek(-possiblePaddingLength, io.SeekEnd); err != nil {
+				return fmt.Errorf("checking size of padding at end of file: %w", err)
+			}
+			buf := make([]byte, possiblePaddingLength)
+			n, err := imageFile.Read(buf)
+			if err != nil {
+				return fmt.Errorf("reading possible padding at end of file: %w", err)
+			}
+			if n != len(buf) {
+				return fmt.Errorf("short read checking size of padding at end of file: %d != %d", n, len(buf))
+			}
+			if bytes.Equal(buf[:possiblePaddingLength-overwriteOffset], make([]byte, possiblePaddingLength-overwriteOffset)) {
+				// everything up to the configuration was zero bytes, so it was padding
+				overwriteOffset = possiblePaddingLength
+				paddingSize = possiblePaddingLength
+				break
+			}
+		}
+	}
+
+	// Append the krun configuration to a new buffer.
+	var formatted bytes.Buffer
+	nWritten, err := formatted.Write(workloadConfigBytes)
+	if err != nil {
+		return fmt.Errorf("building workload config: %w", err)
+	}
+	if nWritten != len(workloadConfigBytes) {
+		return fmt.Errorf("short write appending configuration to buffer: %d != %d", nWritten, len(workloadConfigBytes))
+	}
+	// Append the magic string to the buffer.
+	nWritten, err = formatted.WriteString(krunMagic)
+	if err != nil {
+		return fmt.Errorf("building workload config signature: %w", err)
+	}
+	if nWritten != len(krunMagic) {
+		return fmt.Errorf("short write appending krun magic to buffer: %d != %d", nWritten, len(krunMagic))
+	}
+	// Append the 64-bit little-endian length of the workload configuration to the buffer.
+	workloadConfigLengthBytes := make([]byte, 8)
+	binary.LittleEndian.PutUint64(workloadConfigLengthBytes, uint64(len(workloadConfigBytes)))
+	nWritten, err = formatted.Write(workloadConfigLengthBytes)
+	if err != nil {
+		return fmt.Errorf("building workload config signature size: %w", err)
+	}
+	if nWritten != len(workloadConfigLengthBytes) {
+		return fmt.Errorf("short write appending configuration length to buffer: %d != %d", nWritten, len(workloadConfigLengthBytes))
+	}
+
+	// Build a copy of that data, with padding preceding it.
+	var padded bytes.Buffer
+	if int64(formatted.Len())%paddingSize != 0 {
+		extra := paddingSize - (int64(formatted.Len()) % paddingSize)
+		nWritten, err := padded.Write(make([]byte, extra))
+		if err != nil {
+			return fmt.Errorf("buffering padding: %w", err)
+		}
+		if int64(nWritten) != extra {
+			return fmt.Errorf("short write buffering padding for disk image: %d != %d", nWritten, extra)
+		}
+	}
+	extra := int64(formatted.Len())
+	nWritten, err = padded.Write(formatted.Bytes())
+	if err != nil {
+		return fmt.Errorf("buffering workload config: %w", err)
+	}
+	if int64(nWritten) != extra {
+		return fmt.Errorf("short write buffering workload config: %d != %d", nWritten, extra)
+	}
+
+	// Write the buffer to the file, starting with padding.
+	if _, err = imageFile.Seek(-overwriteOffset, io.SeekEnd); err != nil {
+		return fmt.Errorf("preparing to write workload config: %w", err)
+	}
+	nWritten, err = imageFile.Write(padded.Bytes())
+	if err != nil {
+		return fmt.Errorf("writing workload config: %w", err)
+	}
+	if nWritten != padded.Len() {
+		return fmt.Errorf("short write writing configuration to disk image: %d != %d", nWritten, padded.Len())
+	}
+	offset, err := imageFile.Seek(0, io.SeekCurrent)
+	if err != nil {
+		return fmt.Errorf("preparing mark end of disk image: %w", err)
+	}
+	if err = imageFile.Truncate(offset); err != nil {
+		return fmt.Errorf("marking end of disk image: %w", err)
+	}
+	return nil
+}

internal/mkcw/workload_test.go

@@ -0,0 +1,62 @@
+package mkcw
+
+import (
+	"crypto/rand"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestReadWriteWorkloadConfig(t *testing.T) {
+	// Create a temporary file to stand in for a disk image.
+	temp := filepath.Join(t.TempDir(), "disk.img")
+	f, err := os.OpenFile(temp, os.O_CREATE|os.O_RDWR, 0o600)
+	require.NoError(t, err)
+	err = f.Truncate(0x1000000)
+	require.NoError(t, err)
+	defer f.Close()
+
+	// Generate a random "encoded workload config".
+	workloadConfig := make([]byte, 0x100)
+	n, err := rand.Read(workloadConfig)
+	require.NoError(t, err)
+	require.Equal(t, len(workloadConfig), n)
+
+	// Read the size of our temporary file.
+	st, err := f.Stat()
+	require.NoError(t, err)
+	originalSize := st.Size()
+
+	// Should get an error, since there's no workloadConfig in there to read.
+	_, err = ReadWorkloadConfigFromImage(f.Name())
+	require.Error(t, err)
+
+	// File should grow, even though we looked for an old config to overwrite.
+	err = WriteWorkloadConfigToImage(f, workloadConfig, true)
+	require.NoError(t, err)
+	st, err = f.Stat()
+	require.NoError(t, err)
+	require.Greater(t, st.Size(), originalSize)
+	originalSize = st.Size()
+
+	// File shouldn't grow, even overwriting the config with a slightly larger one.
+	err = WriteWorkloadConfigToImage(f, append([]byte("slightly longer"), workloadConfig...), true)
+	require.NoError(t, err)
+	st, err = f.Stat()
+	require.NoError(t, err)
+	require.Equal(t, originalSize, st.Size())
+	originalSize = st.Size()
+
+	// File should grow if we're not trying to replace an old one config with a new one.
+	err = WriteWorkloadConfigToImage(f, []byte("{\"comment\":\"quite a bit shorter\"}"), false)
+	require.NoError(t, err)
+	st, err = f.Stat()
+	require.NoError(t, err)
+	require.Greater(t, st.Size(), originalSize)
+
+	// Should read successfully.
+	_, err = ReadWorkloadConfigFromImage(f.Name())
+	require.NoError(t, err)
+}

pkg/cli/build.go

@@ -296,6 +296,13 @@ func GenBuildOptions(c *cobra.Command, inputArgs []string, iopts BuildOptions) (
 			iopts.Quiet = true
 		}
 	}
+	var confidentialWorkloadOptions define.ConfidentialWorkloadOptions
+	if c.Flag("cw").Changed {
+		confidentialWorkloadOptions, err = parse.GetConfidentialWorkloadOptions(iopts.CWOptions)
+		if err != nil {
+			return options, nil, nil, err
+		}
+	}
 	var cacheTo []reference.Named
 	var cacheFrom []reference.Named
 	cacheTo = nil
@@ -364,6 +371,7 @@ func GenBuildOptions(c *cobra.Command, inputArgs []string, iopts BuildOptions) (
 		CacheTTL:                cacheTTL,
 		CNIConfigDir:            iopts.CNIConfigDir,
 		CNIPluginPath:           iopts.CNIPlugInPath,
+		ConfidentialWorkload:    confidentialWorkloadOptions,
 		CPPFlags:                iopts.CPPFlags,
 		CommonBuildOpts:         commonOpts,
 		Compression:             compression,

pkg/cli/common.go

@@ -107,6 +107,7 @@ type BudResults struct {
 	Envs                []string
 	OSFeatures          []string
 	OSVersion           string
+	CWOptions           string
 }
 
 // FromAndBugResults represents the results for common flags
@@ -217,6 +218,7 @@ func GetBudFlags(flags *BudResults) pflag.FlagSet {
 	fs.BoolVar(&flags.Compress, "compress", false, "this is a legacy option, which has no effect on the image")
 	fs.StringArrayVar(&flags.CPPFlags, "cpp-flag", []string{}, "set additional flag to pass to C preprocessor (cpp)")
 	fs.StringVar(&flags.Creds, "creds", "", "use `[username[:password]]` for accessing the registry")
+	fs.StringVarP(&flags.CWOptions, "cw", "", "", "confidential workload `options`")
 	fs.BoolVarP(&flags.DisableCompression, "disable-compression", "D", true, "don't compress layers by default")
 	fs.BoolVar(&flags.DisableContentTrust, "disable-content-trust", false, "this is a Docker specific option and is a NOOP")
 	fs.StringArrayVar(&flags.Envs, "env", []string{}, "set environment variable for the image")
@@ -299,6 +301,7 @@ func GetBudFlagsCompletions() commonComp.FlagCompletions {
 	flagCompletion["cert-dir"] = commonComp.AutocompleteDefault
 	flagCompletion["cpp-flag"] = commonComp.AutocompleteNone
 	flagCompletion["creds"] = commonComp.AutocompleteNone
+	flagCompletion["cw"] = commonComp.AutocompleteNone
 	flagCompletion["env"] = commonComp.AutocompleteNone
 	flagCompletion["file"] = commonComp.AutocompleteDefault
 	flagCompletion["format"] = commonComp.AutocompleteNone

pkg/parse/parse.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/containerd/containerd/platforms"
 	"github.com/containers/buildah/define"
+	mkcwtypes "github.com/containers/buildah/internal/mkcw/types"
 	internalParse "github.com/containers/buildah/internal/parse"
 	internalUtil "github.com/containers/buildah/internal/util"
 	"github.com/containers/buildah/pkg/sshagent"
@@ -640,6 +641,76 @@ func GetBuildOutput(buildOutput string) (define.BuildOutputOption, error) {
 	return define.BuildOutputOption{Path: path, IsDir: isDir, IsStdout: isStdout}, nil
 }
 
+// GetConfidentialWorkloadOptions parses a confidential workload settings
+// argument, which controls both whether or not we produce an image that
+// expects to be run using krun, and how we handle things like encrypting
+// the disk image that the container image will contain.
+func GetConfidentialWorkloadOptions(arg string) (define.ConfidentialWorkloadOptions, error) {
+	options := define.ConfidentialWorkloadOptions{
+		TempDir: GetTempDir(),
+	}
+	defaults := options
+	for _, option := range strings.Split(arg, ",") {
+		var err error
+		switch {
+		case strings.HasPrefix(option, "type="):
+			options.TeeType = define.TeeType(strings.ToLower(strings.TrimPrefix(option, "type=")))
+			switch options.TeeType {
+			case define.SEV, define.SNP, mkcwtypes.SEV_NO_ES:
+			default:
+				return options, fmt.Errorf("parsing type= value %q: unrecognized value", options.TeeType)
+			}
+		case strings.HasPrefix(option, "attestation_url="), strings.HasPrefix(option, "attestation-url="):
+			options.Convert = true
+			options.AttestationURL = strings.TrimPrefix(option, "attestation_url=")
+			if options.AttestationURL == option {
+				options.AttestationURL = strings.TrimPrefix(option, "attestation-url=")
+			}
+		case strings.HasPrefix(option, "passphrase="), strings.HasPrefix(option, "passphrase="):
+			options.Convert = true
+			options.DiskEncryptionPassphrase = strings.TrimPrefix(option, "passphrase=")
+		case strings.HasPrefix(option, "workload_id="), strings.HasPrefix(option, "workload-id="):
+			options.WorkloadID = strings.TrimPrefix(option, "workload_id=")
+			if options.WorkloadID == option {
+				options.WorkloadID = strings.TrimPrefix(option, "workload-id=")
+			}
+		case strings.HasPrefix(option, "cpus="):
+			options.CPUs, err = strconv.Atoi(strings.TrimPrefix(option, "cpus="))
+			if err != nil {
+				return options, fmt.Errorf("parsing cpus= value %q: %w", strings.TrimPrefix(option, "cpus="), err)
+			}
+		case strings.HasPrefix(option, "memory="):
+			options.Memory, err = strconv.Atoi(strings.TrimPrefix(option, "memory="))
+			if err != nil {
+				return options, fmt.Errorf("parsing memory= value %q: %w", strings.TrimPrefix(option, "memorys"), err)
+			}
+		case option == "ignore_attestation_errors", option == "ignore-attestation-errors":
+			options.IgnoreAttestationErrors = true
+		case strings.HasPrefix(option, "ignore_attestation_errors="), strings.HasPrefix(option, "ignore-attestation-errors="):
+			val := strings.TrimPrefix(option, "ignore_attestation_errors=")
+			if val == option {
+				val = strings.TrimPrefix(option, "ignore-attestation-errors=")
+			}
+			options.IgnoreAttestationErrors = val == "true" || val == "yes" || val == "on" || val == "1"
+		case strings.HasPrefix(option, "firmware-library="), strings.HasPrefix(option, "firmware_library="):
+			val := strings.TrimPrefix(option, "firmware-library=")
+			if val == option {
+				val = strings.TrimPrefix(option, "firmware_library=")
+			}
+			options.FirmwareLibrary = val
+		case strings.HasPrefix(option, "slop="):
+			options.Slop = strings.TrimPrefix(option, "slop=")
+		default:
+			knownOptions := []string{"type", "attestation_url", "passphrase", "workload_id", "cpus", "memory", "firmware_library", "slop"}
+			return options, fmt.Errorf("expected one or more of %q as arguments for --cw, not %q", knownOptions, option)
+		}
+	}
+	if options != defaults && !options.Convert {
+		return options, fmt.Errorf("--cw arguments missing one or more of (%q, %q)", "passphrase", "attestation_url")
+	}
+	return options, nil
+}
+
 // IDMappingOptions parses the build options related to user namespaces and ID mapping.
 func IDMappingOptions(c *cobra.Command, isolation define.Isolation) (usernsOptions define.NamespaceOptions, idmapOptions *define.IDMappingOptions, err error) {
 	return IDMappingOptionsFromFlagSet(c.Flags(), c.PersistentFlags(), c.Flag)

tests/mkcw.bats

@@ -0,0 +1,82 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function mkcw_check_image() {
+  local imageID="$1"
+  local expectedEnv="$2"
+  # Mount the container and take a look at what it got from the image.
+  run_buildah from "$imageID"
+  ctrID="$output"
+  run_buildah mount "$ctrID"
+  mountpoint="$output"
+  # Should have a /disk.img file.
+  test -s "$mountpoint"/disk.img
+  # Should have a krun-sev.json file.
+  test -s "$mountpoint"/krun-sev.json
+  # Should have an executable entrypoint binary.
+  test -s "$mountpoint"/entrypoint
+  test -x "$mountpoint"/entrypoint
+  # Should have a sticky /tmp directory.
+  test -d "$mountpoint"/tmp
+  test -k "$mountpoint"/tmp
+
+  # Decrypt, mount, and take a look around.
+  uuid=$(cryptsetup luksUUID "$mountpoint"/disk.img)
+  cryptsetup luksOpen --key-file "$TEST_SCRATCH_DIR"/key "$mountpoint"/disk.img "$uuid"
+  mkdir -p "$TEST_SCRATCH_DIR"/mount
+  mount /dev/mapper/"$uuid" "$TEST_SCRATCH_DIR"/mount
+  # Should have a not-empty config file with parts of an image's config.
+  test -s "$TEST_SCRATCH_DIR"/mount/.krun_config.json
+  if test -n "$expectedEnv" ; then
+    grep -q "expectedEnv" "$TEST_SCRATCH_DIR"/mount/.krun_config.json
+  fi
+  # Should have a /tmp directory, at least.
+  test -d "$TEST_SCRATCH_DIR"/mount/tmp
+
+  # Clean up.
+  umount "$TEST_SCRATCH_DIR"/mount
+  cryptsetup luksClose "$uuid"
+  buildah umount "$ctrID"
+}
+
+@test "mkcw-convert" {
+  skip_if_in_container
+  skip_if_rootless_environment
+  if ! which cryptsetup > /dev/null 2> /dev/null ; then
+    skip "cryptsetup not found"
+  fi
+  _prefetch busybox
+
+  echo -n mkcw-convert > "$TEST_SCRATCH_DIR"/key
+  run_buildah mkcw --ignore-attestation-errors --passphrase=mkcw-convert busybox busybox-cw
+  mkcw_check_image busybox-cw
+}
+
+@test "mkcw-commit" {
+  skip_if_in_container
+  skip_if_rootless_environment
+  if ! which cryptsetup > /dev/null 2> /dev/null ; then
+    skip "cryptsetup not found"
+  fi
+  _prefetch busybox
+
+  echo -n "mkcw commit" > "$TEST_SCRATCH_DIR"/key
+  run_buildah from busybox
+  ctrID="$output"
+  run_buildah commit --iidfile "$TEST_SCRATCH_DIR"/iid --cw type=SEV,ignore_attestation_errors,passphrase="mkcw commit" "$ctrID"
+  mkcw_check_image $(cat "$TEST_SCRATCH_DIR"/iid)
+}
+
+@test "mkcw build" {
+  skip_if_in_container
+  skip_if_rootless_environment
+  if ! which cryptsetup > /dev/null 2> /dev/null ; then
+    skip "cryptsetup not found"
+  fi
+  _prefetch alpine
+
+  echo -n "mkcw build" > "$TEST_SCRATCH_DIR"/key
+  run_buildah build --iidfile "$TEST_SCRATCH_DIR"/iid --cw type=SEV,ignore_attestation_errors,passphrase="mkcw build" -f bud/env/Dockerfile.check-env bud/env
+  mkcw_check_image $(cat "$TEST_SCRATCH_DIR"/iid)
+}

vendor/github.com/aead/serpent/.gitignore

@@ -0,0 +1,25 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+.vscode
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

vendor/github.com/aead/serpent/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Andreas Auernhammer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/aead/serpent/README.md

@@ -0,0 +1,9 @@
+[![Godoc Reference](https://godoc.org/github.com/aead/serpent?status.svg)](https://godoc.org/github.com/aead/serpent)
+
+## The Serpent block cipher
+
+Serpent is a symmetric key block cipher that was a finalist in the Advanced Encryption Standard (AES) contest, 
+where it was ranked second to Rijndael. Serpent was designed by Ross Anderson, Eli Biham, and Lars Knudsen.
+
+### Installation
+Install in your GOPATH: `go get -u github.com/aead/serpent`  

vendor/github.com/aead/serpent/sbox_ref.go

@@ -0,0 +1,316 @@
+// Copyright (c) 2016 Andreas Auernhammer. All rights reserved.
+// Use of this source code is governed by a license that can be
+// found in the LICENSE file.
+
+package serpent
+
+// The linear transformation of serpent
+// This version, tries not to minimize the
+// number of registers, but maximize parallism.
+func linear(v0, v1, v2, v3 *uint32) {
+	t0 := ((*v0 << 13) | (*v0 >> (32 - 13)))
+	t2 := ((*v2 << 3) | (*v2 >> (32 - 3)))
+	t1 := *v1 ^ t0 ^ t2
+	t3 := *v3 ^ t2 ^ (t0 << 3)
+	*v1 = (t1 << 1) | (t1 >> (32 - 1))
+	*v3 = (t3 << 7) | (t3 >> (32 - 7))
+	t0 ^= *v1 ^ *v3
+	t2 ^= *v3 ^ (*v1 << 7)
+	*v0 = (t0 << 5) | (t0 >> (32 - 5))
+	*v2 = (t2 << 22) | (t2 >> (32 - 22))
+}
+
+// The inverse linear transformation of serpent
+// This version, tries not to minimize the
+// number of registers, but maximize parallism.
+func linearInv(v0, v1, v2, v3 *uint32) {
+	t2 := (*v2 >> 22) | (*v2 << (32 - 22))
+	t0 := (*v0 >> 5) | (*v0 << (32 - 5))
+	t2 ^= *v3 ^ (*v1 << 7)
+	t0 ^= *v1 ^ *v3
+	t3 := (*v3 >> 7) | (*v3 << (32 - 7))
+	t1 := (*v1 >> 1) | (*v1 << (32 - 1))
+	*v3 = t3 ^ t2 ^ (t0 << 3)
+	*v1 = t1 ^ t0 ^ t2
+	*v2 = (t2 >> 3) | (t2 << (32 - 3))
+	*v0 = (t0 >> 13) | (t0 << (32 - 13))
+}
+
+// The following functions sb0,sb1, ..., sb7 represent the 8 Serpent S-Boxes.
+// sb0Inv til sb7Inv are the inverse functions (e.g. sb0Inv is the Inverse to sb0
+// and vice versa).
+// The S-Boxes differ from the original Serpent definitions. This is for
+// optimisation. The functions use the Serpent S-Box improvements for (non x86)
+// from Dr. B. R. Gladman and Sam Simpson.
+
+// S-Box 0
+func sb0(r0, r1, r2, r3 *uint32) {
+	t0 := *r0 ^ *r3
+	t1 := *r2 ^ t0
+	t2 := *r1 ^ t1
+	*r3 = (*r0 & *r3) ^ t2
+	t3 := *r0 ^ (*r1 & t0)
+	*r2 = t2 ^ (*r2 | t3)
+	t4 := *r3 & (t1 ^ t3)
+	*r1 = (^t1) ^ t4
+	*r0 = t4 ^ (^t3)
+}
+
+// Inverse S-Box 0
+func sb0Inv(r0, r1, r2, r3 *uint32) {
+	t0 := ^(*r0)
+	t1 := *r0 ^ *r1
+	t2 := *r3 ^ (t0 | t1)
+	t3 := *r2 ^ t2
+	*r2 = t1 ^ t3
+	t4 := t0 ^ (*r3 & t1)
+	*r1 = t2 ^ (*r2 & t4)
+	*r3 = (*r0 & t2) ^ (t3 | *r1)
+	*r0 = *r3 ^ (t3 ^ t4)
+}
+
+// S-Box 1
+func sb1(r0, r1, r2, r3 *uint32) {
+	t0 := *r1 ^ (^(*r0))
+	t1 := *r2 ^ (*r0 | t0)
+	*r2 = *r3 ^ t1
+	t2 := *r1 ^ (*r3 | t0)
+	t3 := t0 ^ *r2
+	*r3 = t3 ^ (t1 & t2)
+	t4 := t1 ^ t2
+	*r1 = *r3 ^ t4
+	*r0 = t1 ^ (t3 & t4)
+}
+
+// Inverse S-Box 1
+func sb1Inv(r0, r1, r2, r3 *uint32) {
+	t0 := *r1 ^ *r3
+	t1 := *r0 ^ (*r1 & t0)
+	t2 := t0 ^ t1
+	*r3 = *r2 ^ t2
+	t3 := *r1 ^ (t0 & t1)
+	t4 := *r3 | t3
+	*r1 = t1 ^ t4
+	t5 := ^(*r1)
+	t6 := *r3 ^ t3
+	*r0 = t5 ^ t6
+	*r2 = t2 ^ (t5 | t6)
+}
+
+// S-Box 2
+func sb2(r0, r1, r2, r3 *uint32) {
+	v0 := *r0 // save r0
+	v3 := *r3 // save r3
+	t0 := ^v0
+	t1 := *r1 ^ v3
+	t2 := *r2 & t0
+	*r0 = t1 ^ t2
+	t3 := *r2 ^ t0
+	t4 := *r2 ^ *r0
+	t5 := *r1 & t4
+	*r3 = t3 ^ t5
+	*r2 = v0 ^ ((v3 | t5) & (*r0 | t3))
+	*r1 = (t1 ^ *r3) ^ (*r2 ^ (v3 | t0))
+}
+
+// Inverse S-Box 2
+func sb2Inv(r0, r1, r2, r3 *uint32) {
+	v0 := *r0 // save r0
+	v3 := *r3 // save r3
+	t0 := *r1 ^ v3
+	t1 := ^t0
+	t2 := v0 ^ *r2
+	t3 := *r2 ^ t0
+	t4 := *r1 & t3
+	*r0 = t2 ^ t4
+	t5 := v0 | t1
+	t6 := v3 ^ t5
+	t7 := t2 | t6
+	*r3 = t0 ^ t7
+	t8 := ^t3
+	t9 := *r0 | *r3
+	*r1 = t8 ^ t9
+	*r2 = (v3 & t8) ^ (t2 ^ t9)
+}
+
+// S-Box 3
+func sb3(r0, r1, r2, r3 *uint32) {
+	v1 := *r1 // save r1
+	v3 := *r3 // save r3
+	t0 := *r0 ^ *r1
+	t1 := *r0 & *r2
+	t2 := *r0 | *r3
+	t3 := *r2 ^ *r3
+	t4 := t0 & t2
+	t5 := t1 | t4
+	*r2 = t3 ^ t5
+	t6 := *r1 ^ t2
+	t7 := t5 ^ t6
+	t8 := t3 & t7
+	*r0 = t0 ^ t8
+	t9 := *r2 & *r0
+	*r1 = t7 ^ t9
+	*r3 = (v1 | v3) ^ (t3 ^ t9)
+}
+
+// Inverse S-Box 3
+func sb3Inv(r0, r1, r2, r3 *uint32) {
+	t0 := *r0 | *r1
+	t1 := *r1 ^ *r2
+	t2 := *r1 & t1
+	t3 := *r0 ^ t2
+	t4 := *r2 ^ t3
+	t5 := *r3 | t3
+	*r0 = t1 ^ t5
+	t6 := t1 | t5
+	t7 := *r3 ^ t6
+	*r2 = t4 ^ t7
+	t8 := t0 ^ t7
+	t9 := *r0 & t8
+	*r3 = t3 ^ t9
+	*r1 = *r3 ^ (*r0 ^ t8)
+}
+
+// S-Box 4
+func sb4(r0, r1, r2, r3 *uint32) {
+	v0 := *r0 // save r0
+	t0 := v0 ^ *r3
+	t1 := *r3 & t0
+	t2 := *r2 ^ t1
+	t3 := *r1 | t2
+	*r3 = t0 ^ t3
+	t4 := ^(*r1)
+	t5 := t0 | t4
+	*r0 = t2 ^ t5
+	t6 := v0 & *r0
+	t7 := t0 ^ t4
+	t8 := t3 & t7
+	*r2 = t6 ^ t8
+	*r1 = (v0 ^ t2) ^ (t7 & *r2)
+}
+
+// Inverse S-Box 4
+func sb4Inv(r0, r1, r2, r3 *uint32) {
+	v3 := *r3 // save r3
+	t0 := *r2 | v3
+	t1 := *r0 & t0
+	t2 := *r1 ^ t1
+	t3 := *r0 & t2
+	t4 := *r2 ^ t3
+	*r1 = v3 ^ t4
+	t5 := ^(*r0)
+	t6 := t4 & *r1
+	*r3 = t2 ^ t6
+	t7 := *r1 | t5
+	t8 := v3 ^ t7
+	*r0 = *r3 ^ t8
+	*r2 = (t2 & t8) ^ (*r1 ^ t5)
+}
+
+// S-Box 5
+func sb5(r0, r1, r2, r3 *uint32) {
+	v1 := *r1 // save r1
+	t0 := ^(*r0)
+	t1 := *r0 ^ v1
+	t2 := *r0 ^ *r3
+	t3 := *r2 ^ t0
+	t4 := t1 | t2
+	*r0 = t3 ^ t4
+	t5 := *r3 & *r0
+	t6 := t1 ^ *r0
+	*r1 = t5 ^ t6
+	t7 := t0 | *r0
+	t8 := t1 | t5
+	t9 := t2 ^ t7
+	*r2 = t8 ^ t9
+	*r3 = (v1 ^ t5) ^ (*r1 & t9)
+}
+
+// Inverse S-Box 5
+func sb5Inv(r0, r1, r2, r3 *uint32) {
+	v0 := *r0 // save r0
+	v1 := *r1 // save r1
+	v3 := *r3 // save r3
+	t0 := ^(*r2)
+	t1 := v1 & t0
+	t2 := v3 ^ t1
+	t3 := v0 & t2
+	t4 := v1 ^ t0
+	*r3 = t3 ^ t4
+	t5 := v1 | *r3
+	t6 := v0 & t5
+	*r1 = t2 ^ t6
+	t7 := v0 | v3
+	t8 := t0 ^ t5
+	*r0 = t7 ^ t8
+	*r2 = (v1 & t7) ^ (t3 | (v0 ^ *r2))
+}
+
+// S-Box 6
+func sb6(r0, r1, r2, r3 *uint32) {
+	t0 := ^(*r0)
+	t1 := *r0 ^ *r3
+	t2 := *r1 ^ t1
+	t3 := t0 | t1
+	t4 := *r2 ^ t3
+	*r1 = *r1 ^ t4
+	t5 := t1 | *r1
+	t6 := *r3 ^ t5
+	t7 := t4 & t6
+	*r2 = t2 ^ t7
+	t8 := t4 ^ t6
+	*r0 = *r2 ^ t8
+	*r3 = (^t4) ^ (t2 & t8)
+}
+
+// Inverse S-Box 6
+func sb6Inv(r0, r1, r2, r3 *uint32) {
+	v1 := *r1 // save r1
+	v3 := *r3 // save r3
+	t0 := ^(*r0)
+	t1 := *r0 ^ v1
+	t2 := *r2 ^ t1
+	t3 := *r2 | t0
+	t4 := v3 ^ t3
+	*r1 = t2 ^ t4
+	t5 := t2 & t4
+	t6 := t1 ^ t5
+	t7 := v1 | t6
+	*r3 = t4 ^ t7
+	t8 := v1 | *r3
+	*r0 = t6 ^ t8
+	*r2 = (v3 & t0) ^ (t2 ^ t8)
+}
+
+// S-Box 7
+func sb7(r0, r1, r2, r3 *uint32) {
+	t0 := *r1 ^ *r2
+	t1 := *r2 & t0
+	t2 := *r3 ^ t1
+	t3 := *r0 ^ t2
+	t4 := *r3 | t0
+	t5 := t3 & t4
+	*r1 = *r1 ^ t5
+	t6 := t2 | *r1
+	t7 := *r0 & t3
+	*r3 = t0 ^ t7
+	t8 := t3 ^ t6
+	t9 := *r3 & t8
+	*r2 = t2 ^ t9
+	*r0 = (^t8) ^ (*r3 & *r2)
+}
+
+// Inverse S-Box 7
+func sb7Inv(r0, r1, r2, r3 *uint32) {
+	v0 := *r0 // save r0
+	v3 := *r3 // save r3
+	t0 := *r2 | (v0 & *r1)
+	t1 := v3 & (v0 | *r1)
+	*r3 = t0 ^ t1
+	t2 := ^v3
+	t3 := *r1 ^ t1
+	t4 := t3 | (*r3 ^ t2)
+	*r1 = v0 ^ t4
+	*r0 = (*r2 ^ t3) ^ (v3 | *r1)
+	*r2 = (t0 ^ *r1) ^ (*r0 ^ (v0 & *r3))
+}

vendor/github.com/aead/serpent/serpent.go

@@ -0,0 +1,119 @@
+// Copyright (c) 2016 Andreas Auernhammer. All rights reserved.
+// Use of this source code is governed by a license that can be
+// found in the LICENSE file.
+
+// Package serpent implements the Serpent block cipher
+// submitted to the AES challenge. Serpent was designed by
+// Ross Anderson, Eli Biham und Lars Knudsen.
+// The block cipher takes a 128, 192 or 256 bit key and
+// has a block size of 128 bit.
+package serpent // import "github.com/aead/serpent"
+
+import (
+	"crypto/cipher"
+	"errors"
+)
+
+// BlockSize is the serpent block size in bytes.
+const BlockSize = 16
+
+const phi = 0x9e3779b9 // The Serpent phi constant (sqrt(5) - 1) * 2**31
+
+var errKeySize = errors.New("invalid key size")
+
+// NewCipher returns a new cipher.Block implementing the serpent block cipher.
+// The key argument must be 128, 192 or 256 bit (16, 24, 32 byte).
+func NewCipher(key []byte) (cipher.Block, error) {
+	if k := len(key); k != 16 && k != 24 && k != 32 {
+		return nil, errKeySize
+	}
+	s := &subkeys{}
+	s.keySchedule(key)
+	return s, nil
+}
+
+// The 132 32 bit subkeys of serpent
+type subkeys [132]uint32
+
+func (s *subkeys) BlockSize() int { return BlockSize }
+
+func (s *subkeys) Encrypt(dst, src []byte) {
+	if len(src) < BlockSize {
+		panic("src buffer to small")
+	}
+	if len(dst) < BlockSize {
+		panic("dst buffer to small")
+	}
+	encryptBlock(dst, src, s)
+}
+
+func (s *subkeys) Decrypt(dst, src []byte) {
+	if len(src) < BlockSize {
+		panic("src buffer to small")
+	}
+	if len(dst) < BlockSize {
+		panic("dst buffer to small")
+	}
+	decryptBlock(dst, src, s)
+}
+
+// The key schedule of serpent.
+func (s *subkeys) keySchedule(key []byte) {
+	var k [16]uint32
+	j := 0
+	for i := 0; i+4 <= len(key); i += 4 {
+		k[j] = uint32(key[i]) | uint32(key[i+1])<<8 | uint32(key[i+2])<<16 | uint32(key[i+3])<<24
+		j++
+	}
+	if j < 8 {
+		k[j] = 1
+	}
+
+	for i := 8; i < 16; i++ {
+		x := k[i-8] ^ k[i-5] ^ k[i-3] ^ k[i-1] ^ phi ^ uint32(i-8)
+		k[i] = (x << 11) | (x >> 21)
+		s[i-8] = k[i]
+	}
+	for i := 8; i < 132; i++ {
+		x := s[i-8] ^ s[i-5] ^ s[i-3] ^ s[i-1] ^ phi ^ uint32(i)
+		s[i] = (x << 11) | (x >> 21)
+	}
+
+	sb3(&s[0], &s[1], &s[2], &s[3])
+	sb2(&s[4], &s[5], &s[6], &s[7])
+	sb1(&s[8], &s[9], &s[10], &s[11])
+	sb0(&s[12], &s[13], &s[14], &s[15])
+	sb7(&s[16], &s[17], &s[18], &s[19])
+	sb6(&s[20], &s[21], &s[22], &s[23])
+	sb5(&s[24], &s[25], &s[26], &s[27])
+	sb4(&s[28], &s[29], &s[30], &s[31])
+
+	sb3(&s[32], &s[33], &s[34], &s[35])
+	sb2(&s[36], &s[37], &s[38], &s[39])
+	sb1(&s[40], &s[41], &s[42], &s[43])
+	sb0(&s[44], &s[45], &s[46], &s[47])
+	sb7(&s[48], &s[49], &s[50], &s[51])
+	sb6(&s[52], &s[53], &s[54], &s[55])
+	sb5(&s[56], &s[57], &s[58], &s[59])
+	sb4(&s[60], &s[61], &s[62], &s[63])
+
+	sb3(&s[64], &s[65], &s[66], &s[67])
+	sb2(&s[68], &s[69], &s[70], &s[71])
+	sb1(&s[72], &s[73], &s[74], &s[75])
+	sb0(&s[76], &s[77], &s[78], &s[79])
+	sb7(&s[80], &s[81], &s[82], &s[83])
+	sb6(&s[84], &s[85], &s[86], &s[87])
+	sb5(&s[88], &s[89], &s[90], &s[91])
+	sb4(&s[92], &s[93], &s[94], &s[95])
+
+	sb3(&s[96], &s[97], &s[98], &s[99])
+	sb2(&s[100], &s[101], &s[102], &s[103])
+	sb1(&s[104], &s[105], &s[106], &s[107])
+	sb0(&s[108], &s[109], &s[110], &s[111])
+	sb7(&s[112], &s[113], &s[114], &s[115])
+	sb6(&s[116], &s[117], &s[118], &s[119])
+	sb5(&s[120], &s[121], &s[122], &s[123])
+	sb4(&s[124], &s[125], &s[126], &s[127])
+
+	sb3(&s[128], &s[129], &s[130], &s[131])
+}

vendor/github.com/aead/serpent/serpent_ref.go

@@ -0,0 +1,276 @@
+// Copyright (c) 2016 Andreas Auernhammer. All rights reserved.
+// Use of this source code is governed by a license that can be
+// found in the LICENSE file.
+
+package serpent
+
+// Encrypts one block with the given 132 sub-keys sk.
+func encryptBlock(dst, src []byte, sk *subkeys) {
+	// Transform the input block to 4 x 32 bit registers
+	r0 := uint32(src[0]) | uint32(src[1])<<8 | uint32(src[2])<<16 | uint32(src[3])<<24
+	r1 := uint32(src[4]) | uint32(src[5])<<8 | uint32(src[6])<<16 | uint32(src[7])<<24
+	r2 := uint32(src[8]) | uint32(src[9])<<8 | uint32(src[10])<<16 | uint32(src[11])<<24
+	r3 := uint32(src[12]) | uint32(src[13])<<8 | uint32(src[14])<<16 | uint32(src[15])<<24
+
+	// Encrypt the block with the 132 sub-keys and 8 S-Boxes
+	r0, r1, r2, r3 = r0^sk[0], r1^sk[1], r2^sk[2], r3^sk[3]
+	sb0(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[4], r1^sk[5], r2^sk[6], r3^sk[7]
+	sb1(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[8], r1^sk[9], r2^sk[10], r3^sk[11]
+	sb2(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[12], r1^sk[13], r2^sk[14], r3^sk[15]
+	sb3(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[16], r1^sk[17], r2^sk[18], r3^sk[19]
+	sb4(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[20], r1^sk[21], r2^sk[22], r3^sk[23]
+	sb5(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[24], r1^sk[25], r2^sk[26], r3^sk[27]
+	sb6(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[28], r1^sk[29], r2^sk[30], r3^sk[31]
+	sb7(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+
+	r0, r1, r2, r3 = r0^sk[32], r1^sk[33], r2^sk[34], r3^sk[35]
+	sb0(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[36], r1^sk[37], r2^sk[38], r3^sk[39]
+	sb1(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[40], r1^sk[41], r2^sk[42], r3^sk[43]
+	sb2(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[44], r1^sk[45], r2^sk[46], r3^sk[47]
+	sb3(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[48], r1^sk[49], r2^sk[50], r3^sk[51]
+	sb4(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[52], r1^sk[53], r2^sk[54], r3^sk[55]
+	sb5(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[56], r1^sk[57], r2^sk[58], r3^sk[59]
+	sb6(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[60], r1^sk[61], r2^sk[62], r3^sk[63]
+	sb7(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+
+	r0, r1, r2, r3 = r0^sk[64], r1^sk[65], r2^sk[66], r3^sk[67]
+	sb0(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[68], r1^sk[69], r2^sk[70], r3^sk[71]
+	sb1(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[72], r1^sk[73], r2^sk[74], r3^sk[75]
+	sb2(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[76], r1^sk[77], r2^sk[78], r3^sk[79]
+	sb3(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[80], r1^sk[81], r2^sk[82], r3^sk[83]
+	sb4(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[84], r1^sk[85], r2^sk[86], r3^sk[87]
+	sb5(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[88], r1^sk[89], r2^sk[90], r3^sk[91]
+	sb6(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[92], r1^sk[93], r2^sk[94], r3^sk[95]
+	sb7(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+
+	r0, r1, r2, r3 = r0^sk[96], r1^sk[97], r2^sk[98], r3^sk[99]
+	sb0(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[100], r1^sk[101], r2^sk[102], r3^sk[103]
+	sb1(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[104], r1^sk[105], r2^sk[106], r3^sk[107]
+	sb2(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[108], r1^sk[109], r2^sk[110], r3^sk[111]
+	sb3(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[112], r1^sk[113], r2^sk[114], r3^sk[115]
+	sb4(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[116], r1^sk[117], r2^sk[118], r3^sk[119]
+	sb5(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[120], r1^sk[121], r2^sk[122], r3^sk[123]
+	sb6(&r0, &r1, &r2, &r3)
+	linear(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[124], r1^sk[125], r2^sk[126], r3^sk[127]
+	sb7(&r0, &r1, &r2, &r3)
+
+	// whitening
+	r0 ^= sk[128]
+	r1 ^= sk[129]
+	r2 ^= sk[130]
+	r3 ^= sk[131]
+
+	// write the encrypted block to the output
+
+	dst[0] = byte(r0)
+	dst[1] = byte(r0 >> 8)
+	dst[2] = byte(r0 >> 16)
+	dst[3] = byte(r0 >> 24)
+	dst[4] = byte(r1)
+	dst[5] = byte(r1 >> 8)
+	dst[6] = byte(r1 >> 16)
+	dst[7] = byte(r1 >> 24)
+	dst[8] = byte(r2)
+	dst[9] = byte(r2 >> 8)
+	dst[10] = byte(r2 >> 16)
+	dst[11] = byte(r2 >> 24)
+	dst[12] = byte(r3)
+	dst[13] = byte(r3 >> 8)
+	dst[14] = byte(r3 >> 16)
+	dst[15] = byte(r3 >> 24)
+}
+
+// Decrypts one block with the given 132 sub-keys sk.
+func decryptBlock(dst, src []byte, sk *subkeys) {
+	// Transform the input block to 4 x 32 bit registers
+	r0 := uint32(src[0]) | uint32(src[1])<<8 | uint32(src[2])<<16 | uint32(src[3])<<24
+	r1 := uint32(src[4]) | uint32(src[5])<<8 | uint32(src[6])<<16 | uint32(src[7])<<24
+	r2 := uint32(src[8]) | uint32(src[9])<<8 | uint32(src[10])<<16 | uint32(src[11])<<24
+	r3 := uint32(src[12]) | uint32(src[13])<<8 | uint32(src[14])<<16 | uint32(src[15])<<24
+
+	// undo whitening
+	r0 ^= sk[128]
+	r1 ^= sk[129]
+	r2 ^= sk[130]
+	r3 ^= sk[131]
+
+	// Decrypt the block with the 132 sub-keys and 8 S-Boxes
+	sb7Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[124], r1^sk[125], r2^sk[126], r3^sk[127]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb6Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[120], r1^sk[121], r2^sk[122], r3^sk[123]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb5Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[116], r1^sk[117], r2^sk[118], r3^sk[119]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb4Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[112], r1^sk[113], r2^sk[114], r3^sk[115]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb3Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[108], r1^sk[109], r2^sk[110], r3^sk[111]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb2Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[104], r1^sk[105], r2^sk[106], r3^sk[107]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb1Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[100], r1^sk[101], r2^sk[102], r3^sk[103]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb0Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[96], r1^sk[97], r2^sk[98], r3^sk[99]
+	linearInv(&r0, &r1, &r2, &r3)
+
+	sb7Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[92], r1^sk[93], r2^sk[94], r3^sk[95]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb6Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[88], r1^sk[89], r2^sk[90], r3^sk[91]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb5Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[84], r1^sk[85], r2^sk[86], r3^sk[87]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb4Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[80], r1^sk[81], r2^sk[82], r3^sk[83]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb3Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[76], r1^sk[77], r2^sk[78], r3^sk[79]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb2Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[72], r1^sk[73], r2^sk[74], r3^sk[75]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb1Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[68], r1^sk[69], r2^sk[70], r3^sk[71]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb0Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[64], r1^sk[65], r2^sk[66], r3^sk[67]
+	linearInv(&r0, &r1, &r2, &r3)
+
+	sb7Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[60], r1^sk[61], r2^sk[62], r3^sk[63]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb6Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[56], r1^sk[57], r2^sk[58], r3^sk[59]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb5Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[52], r1^sk[53], r2^sk[54], r3^sk[55]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb4Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[48], r1^sk[49], r2^sk[50], r3^sk[51]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb3Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[44], r1^sk[45], r2^sk[46], r3^sk[47]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb2Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[40], r1^sk[41], r2^sk[42], r3^sk[43]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb1Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[36], r1^sk[37], r2^sk[38], r3^sk[39]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb0Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[32], r1^sk[33], r2^sk[34], r3^sk[35]
+	linearInv(&r0, &r1, &r2, &r3)
+
+	sb7Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[28], r1^sk[29], r2^sk[30], r3^sk[31]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb6Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[24], r1^sk[25], r2^sk[26], r3^sk[27]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb5Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[20], r1^sk[21], r2^sk[22], r3^sk[23]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb4Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[16], r1^sk[17], r2^sk[18], r3^sk[19]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb3Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[12], r1^sk[13], r2^sk[14], r3^sk[15]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb2Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[8], r1^sk[9], r2^sk[10], r3^sk[11]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb1Inv(&r0, &r1, &r2, &r3)
+	r0, r1, r2, r3 = r0^sk[4], r1^sk[5], r2^sk[6], r3^sk[7]
+	linearInv(&r0, &r1, &r2, &r3)
+	sb0Inv(&r0, &r1, &r2, &r3)
+
+	r0 ^= sk[0]
+	r1 ^= sk[1]
+	r2 ^= sk[2]
+	r3 ^= sk[3]
+
+	// write the decrypted block to the output
+	dst[0] = byte(r0)
+	dst[1] = byte(r0 >> 8)
+	dst[2] = byte(r0 >> 16)
+	dst[3] = byte(r0 >> 24)
+	dst[4] = byte(r1)
+	dst[5] = byte(r1 >> 8)
+	dst[6] = byte(r1 >> 16)
+	dst[7] = byte(r1 >> 24)
+	dst[8] = byte(r2)
+	dst[9] = byte(r2 >> 8)
+	dst[10] = byte(r2 >> 16)
+	dst[11] = byte(r2 >> 24)
+	dst[12] = byte(r3)
+	dst[13] = byte(r3 >> 8)
+	dst[14] = byte(r3 >> 16)
+	dst[15] = byte(r3 >> 24)
+}

vendor/github.com/containers/luksy/.cirrus.yml

@@ -0,0 +1,16 @@
+docker_builder:
+    name: CI
+    env:
+        HOME: /root
+        DEBIAN_FRONTEND: noninteractive
+    setup_script: |
+        apt-get -q update
+        apt-get -q install -y bats cryptsetup golang
+        go version
+        make
+    unit_test_script:
+        go test -v -cover
+    defaults_script: |
+        bats -f defaults ./tests
+    aes_script: |
+        bats -f aes ./tests

vendor/github.com/containers/luksy/.dockerignore

@@ -0,0 +1,2 @@
+lukstool
+lukstool.test

vendor/github.com/containers/luksy/.gitignore

@@ -0,0 +1,21 @@
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work

vendor/github.com/containers/luksy/LICENSE

@@ -0,0 +1,201 @@
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+
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vendor/github.com/containers/luksy/Makefile

@@ -0,0 +1,14 @@
+GO = go
+BATS = bats
+
+all: luksy
+
+luksy: cmd/luksy/*.go *.go
+	$(GO) build -o luksy ./cmd/luksy
+
+clean:
+	$(RM) luksy luksy.test
+
+test:
+	$(GO) test
+	$(BATS) ./tests

vendor/github.com/containers/luksy/README.md

@@ -0,0 +1,10 @@
+luksy: offline encryption/decryption using LUKS formats [![Cirrus CI Status](https://img.shields.io/cirrus/github/containers/luksy/main)](https://cirrus-ci.com/github/containers/luksy/main)
+-
+luksy implements encryption and decryption using LUKSv1 and LUKSv2 formats.
+Think of it as a clunkier cousin of gzip/bzip2/xz that doesn't actually produce
+smaller output than input, but it encrypts, and that's nice.
+
+* The main goal is to be able to encrypt/decrypt when we don't have access to
+  the Linux device mapper.  Duplicating functions of cryptsetup that it can
+  perform without accessing the Linux device mapper is not a priority.
+* If you can use cryptsetup instead, use cryptsetup instead.

vendor/github.com/containers/luksy/decrypt.go

@@ -0,0 +1,244 @@
+package luksy
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os"
+	"strconv"
+
+	"golang.org/x/crypto/argon2"
+	"golang.org/x/crypto/pbkdf2"
+)
+
+// Decrypt attempts to verify the specified password using information from the
+// header and read from the specified file.
+//
+// Returns a function which will decrypt payload blocks in succession, the size
+// of chunks of data that the function expects, the offset in the file where
+// the payload begins, and the size of the payload.
+func (h V1Header) Decrypt(password string, f *os.File) (func([]byte) ([]byte, error), int, int64, int64, error) {
+	st, err := f.Stat()
+	if err != nil {
+		return nil, -1, -1, -1, err
+	}
+	hasher, err := hasherByName(h.HashSpec())
+	if err != nil {
+		return nil, -1, -1, -1, fmt.Errorf("unsupported digest algorithm %q: %w", h.HashSpec(), err)
+	}
+
+	activeKeys := 0
+	for k := 0; k < v1NumKeys; k++ {
+		keyslot, err := h.KeySlot(k)
+		if err != nil {
+			return nil, -1, -1, -1, fmt.Errorf("reading key slot %d: %w", k, err)
+		}
+		active, err := keyslot.Active()
+		if err != nil {
+			return nil, -1, -1, -1, fmt.Errorf("checking if key slot %d is active: %w", k, err)
+		}
+		if !active {
+			continue
+		}
+		activeKeys++
+
+		passwordDerived := pbkdf2.Key([]byte(password), keyslot.KeySlotSalt(), int(keyslot.Iterations()), int(h.KeyBytes()), hasher)
+		striped := make([]byte, h.KeyBytes()*keyslot.Stripes())
+		n, err := f.ReadAt(striped, int64(keyslot.KeyMaterialOffset())*V1SectorSize)
+		if err != nil {
+			return nil, -1, -1, -1, fmt.Errorf("reading diffuse material for keyslot %d: %w", k, err)
+		}
+		if n != len(striped) {
+			return nil, -1, -1, -1, fmt.Errorf("short read while reading diffuse material for keyslot %d: expected %d, got %d", k, len(striped), n)
+		}
+		splitKey, err := v1decrypt(h.CipherName(), h.CipherMode(), 0, passwordDerived, striped, V1SectorSize, false)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "error attempting to decrypt main key: %v\n", err)
+			continue
+		}
+		mkCandidate, err := afMerge(splitKey, hasher(), int(h.KeyBytes()), int(keyslot.Stripes()))
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "error attempting to compute main key: %v\n", err)
+			continue
+		}
+		mkcandidateDerived := pbkdf2.Key(mkCandidate, h.MKDigestSalt(), int(h.MKDigestIter()), v1DigestSize, hasher)
+		ivTweak := 0
+		decryptStream := func(ciphertext []byte) ([]byte, error) {
+			plaintext, err := v1decrypt(h.CipherName(), h.CipherMode(), ivTweak, mkCandidate, ciphertext, V1SectorSize, false)
+			ivTweak += len(ciphertext) / V1SectorSize
+			return plaintext, err
+		}
+		if bytes.Equal(mkcandidateDerived, h.MKDigest()) {
+			payloadOffset := int64(h.PayloadOffset() * V1SectorSize)
+			return decryptStream, V1SectorSize, payloadOffset, st.Size() - payloadOffset, nil
+		}
+	}
+	if activeKeys == 0 {
+		return nil, -1, -1, -1, errors.New("no passwords set on LUKS1 volume")
+	}
+	return nil, -1, -1, -1, errors.New("decryption error: incorrect password")
+}
+
+// Decrypt attempts to verify the specified password using information from the
+// header, JSON block, and read from the specified file.
+//
+// Returns a function which will decrypt payload blocks in succession, the size
+// of chunks of data that the function expects, the offset in the file where
+// the payload begins, and the size of the payload.
+func (h V2Header) Decrypt(password string, f *os.File, j V2JSON) (func([]byte) ([]byte, error), int, int64, int64, error) {
+	foundDigests := 0
+	for d, digest := range j.Digests {
+		if digest.Type != "pbkdf2" {
+			continue
+		}
+		if digest.V2JSONDigestPbkdf2 == nil {
+			return nil, -1, -1, -1, fmt.Errorf("digest %q is corrupt: no pbkdf2 parameters", d)
+		}
+		foundDigests++
+		if len(digest.Segments) == 0 || len(digest.Digest) == 0 {
+			continue
+		}
+		payloadOffset := int64(-1)
+		payloadSectorSize := V1SectorSize
+		payloadEncryption := ""
+		payloadSize := int64(0)
+		ivTweak := 0
+		for _, segmentID := range digest.Segments {
+			segment, ok := j.Segments[segmentID]
+			if !ok {
+				continue // well, that was misleading
+			}
+			if segment.Type != "crypt" {
+				continue
+			}
+			tmp, err := strconv.ParseInt(segment.Offset, 10, 64)
+			if err != nil {
+				continue
+			}
+			payloadOffset = tmp
+			if segment.Size == "dynamic" {
+				st, err := f.Stat()
+				if err != nil {
+					continue
+				}
+				payloadSize = st.Size() - payloadOffset
+			} else {
+				payloadSize, err = strconv.ParseInt(segment.Size, 10, 64)
+				if err != nil {
+					continue
+				}
+			}
+			payloadSectorSize = segment.SectorSize
+			payloadEncryption = segment.Encryption
+			ivTweak = segment.IVTweak
+			break
+		}
+		if payloadEncryption == "" {
+			continue
+		}
+		activeKeys := 0
+		for k, keyslot := range j.Keyslots {
+			if keyslot.Priority != nil && *keyslot.Priority == V2JSONKeyslotPriorityIgnore {
+				continue
+			}
+			applicable := true
+			if len(digest.Keyslots) > 0 {
+				applicable = false
+				for i := 0; i < len(digest.Keyslots); i++ {
+					if k == digest.Keyslots[i] {
+						applicable = true
+						break
+					}
+				}
+			}
+			if !applicable {
+				continue
+			}
+			if keyslot.Type != "luks2" {
+				continue
+			}
+			if keyslot.V2JSONKeyslotLUKS2 == nil {
+				return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt", k)
+			}
+			if keyslot.V2JSONKeyslotLUKS2.AF.Type != "luks1" {
+				continue
+			}
+			if keyslot.V2JSONKeyslotLUKS2.AF.V2JSONAFLUKS1 == nil {
+				return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: no AF parameters", k)
+			}
+			if keyslot.Area.Type != "raw" {
+				return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: key data area is not raw", k)
+			}
+			if keyslot.Area.KeySize*V2SectorSize < keyslot.KeySize*keyslot.AF.Stripes {
+				return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: key data area is too small (%d < %d)", k, keyslot.Area.KeySize*V2SectorSize, keyslot.KeySize*keyslot.AF.Stripes)
+			}
+			var passwordDerived []byte
+			switch keyslot.V2JSONKeyslotLUKS2.Kdf.Type {
+			default:
+				continue
+			case "pbkdf2":
+				if keyslot.V2JSONKeyslotLUKS2.Kdf.V2JSONKdfPbkdf2 == nil {
+					return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: no pbkdf2 parameters", k)
+				}
+				hasher, err := hasherByName(keyslot.Kdf.Hash)
+				if err != nil {
+					return nil, -1, -1, -1, fmt.Errorf("unsupported digest algorithm %q: %w", keyslot.Kdf.Hash, err)
+				}
+				passwordDerived = pbkdf2.Key([]byte(password), keyslot.Kdf.Salt, keyslot.Kdf.Iterations, keyslot.KeySize, hasher)
+			case "argon2i":
+				if keyslot.V2JSONKeyslotLUKS2.Kdf.V2JSONKdfArgon2i == nil {
+					return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: no argon2i parameters", k)
+				}
+				passwordDerived = argon2.Key([]byte(password), keyslot.Kdf.Salt, uint32(keyslot.Kdf.Time), uint32(keyslot.Kdf.Memory), uint8(keyslot.Kdf.CPUs), uint32(keyslot.KeySize))
+			case "argon2id":
+				if keyslot.V2JSONKeyslotLUKS2.Kdf.V2JSONKdfArgon2i == nil {
+					return nil, -1, -1, -1, fmt.Errorf("key slot %q is corrupt: no argon2id parameters", k)
+				}
+				passwordDerived = argon2.IDKey([]byte(password), keyslot.Kdf.Salt, uint32(keyslot.Kdf.Time), uint32(keyslot.Kdf.Memory), uint8(keyslot.Kdf.CPUs), uint32(keyslot.KeySize))
+			}
+			striped := make([]byte, keyslot.KeySize*keyslot.AF.Stripes)
+			n, err := f.ReadAt(striped, int64(keyslot.Area.Offset))
+			if err != nil {
+				return nil, -1, -1, -1, fmt.Errorf("reading diffuse material for keyslot %q: %w", k, err)
+			}
+			if n != len(striped) {
+				return nil, -1, -1, -1, fmt.Errorf("short read while reading diffuse material for keyslot %q: expected %d, got %d", k, len(striped), n)
+			}
+			splitKey, err := v2decrypt(keyslot.Area.Encryption, 0, passwordDerived, striped, V1SectorSize, false)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "error attempting to decrypt main key: %v\n", err)
+				continue
+			}
+			afhasher, err := hasherByName(keyslot.AF.Hash)
+			if err != nil {
+				return nil, -1, -1, -1, fmt.Errorf("unsupported digest algorithm %q: %w", keyslot.AF.Hash, err)
+			}
+			mkCandidate, err := afMerge(splitKey, afhasher(), int(keyslot.KeySize), int(keyslot.AF.Stripes))
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "error attempting to compute main key: %v\n", err)
+				continue
+			}
+			digester, err := hasherByName(digest.Hash)
+			if err != nil {
+				return nil, -1, -1, -1, fmt.Errorf("unsupported digest algorithm %q: %w", digest.Hash, err)
+			}
+			mkcandidateDerived := pbkdf2.Key(mkCandidate, digest.Salt, digest.Iterations, len(digest.Digest), digester)
+			decryptStream := func(ciphertext []byte) ([]byte, error) {
+				plaintext, err := v2decrypt(payloadEncryption, ivTweak, mkCandidate, ciphertext, payloadSectorSize, true)
+				ivTweak += len(ciphertext) / payloadSectorSize
+				return plaintext, err
+			}
+			if bytes.Equal(mkcandidateDerived, digest.Digest) {
+				return decryptStream, payloadSectorSize, payloadOffset, payloadSize, nil
+			}
+			activeKeys++
+		}
+		if activeKeys == 0 {
+			return nil, -1, -1, -1, fmt.Errorf("no passwords set on LUKS2 volume for digest %q", d)
+		}
+	}
+	if foundDigests == 0 {
+		return nil, -1, -1, -1, errors.New("no usable password-verification digests set on LUKS2 volume")
+	}
+	return nil, -1, -1, -1, errors.New("decryption error: incorrect password")
+}

vendor/github.com/containers/luksy/encrypt.go

@@ -0,0 +1,421 @@
+package luksy
+
+import (
+	"crypto/rand"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/google/uuid"
+	"golang.org/x/crypto/argon2"
+	"golang.org/x/crypto/pbkdf2"
+)
+
+// EncryptV1 prepares to encrypt data using one or more passwords and the
+// specified cipher (or a default, if the specified cipher is "").
+//
+// Returns a fixed LUKSv1 header which contains keying information, a function
+// which will encrypt blocks of data in succession, and the size of chunks of
+// data that it expects.
+func EncryptV1(password []string, cipher string) ([]byte, func([]byte) ([]byte, error), int, error) {
+	if len(password) == 0 {
+		return nil, nil, -1, errors.New("at least one password is required")
+	}
+	if len(password) > v1NumKeys {
+		return nil, nil, -1, fmt.Errorf("attempted to use %d passwords, only %d possible", len(password), v1NumKeys)
+	}
+	if cipher == "" {
+		cipher = "aes-xts-plain64"
+	}
+
+	salt := make([]byte, v1SaltSize)
+	n, err := rand.Read(salt)
+	if err != nil {
+		return nil, nil, -1, fmt.Errorf("reading random data: %w", err)
+	}
+	if n != len(salt) {
+		return nil, nil, -1, errors.New("short read")
+	}
+
+	cipherSpec := strings.SplitN(cipher, "-", 3)
+	if len(cipherSpec) != 3 || len(cipherSpec[0]) == 0 || len(cipherSpec[1]) == 0 || len(cipherSpec[2]) == 0 {
+		return nil, nil, -1, fmt.Errorf("invalid cipher %q", cipher)
+	}
+
+	var h V1Header
+	if err := h.SetMagic(V1Magic); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting magic to v1: %w", err)
+	}
+	if err := h.SetVersion(1); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting version to 1: %w", err)
+	}
+	h.SetCipherName(cipherSpec[0])
+	h.SetCipherMode(cipherSpec[1] + "-" + cipherSpec[2])
+	h.SetHashSpec("sha256")
+	h.SetKeyBytes(32)
+	if cipherSpec[1] == "xts" {
+		h.SetKeyBytes(64)
+	}
+	h.SetMKDigestSalt(salt)
+	h.SetMKDigestIter(V1Stripes)
+	h.SetUUID(uuid.NewString())
+
+	mkey := make([]byte, h.KeyBytes())
+	n, err = rand.Read(mkey)
+	if err != nil {
+		return nil, nil, -1, fmt.Errorf("reading random data: %w", err)
+	}
+	if n != len(mkey) {
+		return nil, nil, -1, errors.New("short read")
+	}
+
+	hasher, err := hasherByName(h.HashSpec())
+	if err != nil {
+		return nil, nil, -1, errors.New("internal error")
+	}
+
+	mkdigest := pbkdf2.Key(mkey, h.MKDigestSalt(), int(h.MKDigestIter()), v1DigestSize, hasher)
+	h.SetMKDigest(mkdigest)
+
+	headerLength := roundUpToMultiple(v1HeaderStructSize, V1AlignKeyslots)
+	iterations := IterationsPBKDF2(salt, int(h.KeyBytes()), hasher)
+	var stripes [][]byte
+	ksSalt := make([]byte, v1KeySlotSaltLength)
+	for i := 0; i < v1NumKeys; i++ {
+		n, err = rand.Read(ksSalt)
+		if err != nil {
+			return nil, nil, -1, fmt.Errorf("reading random data: %w", err)
+		}
+		if n != len(ksSalt) {
+			return nil, nil, -1, errors.New("short read")
+		}
+		var keyslot V1KeySlot
+		keyslot.SetActive(i < len(password))
+		keyslot.SetIterations(uint32(iterations))
+		keyslot.SetStripes(V1Stripes)
+		keyslot.SetKeySlotSalt(ksSalt)
+		if i < len(password) {
+			splitKey, err := afSplit(mkey, hasher(), int(h.MKDigestIter()))
+			if err != nil {
+				return nil, nil, -1, fmt.Errorf("splitting key: %w", err)
+			}
+			passwordDerived := pbkdf2.Key([]byte(password[i]), keyslot.KeySlotSalt(), int(keyslot.Iterations()), int(h.KeyBytes()), hasher)
+			striped, err := v1encrypt(h.CipherName(), h.CipherMode(), 0, passwordDerived, splitKey, V1SectorSize, false)
+			if err != nil {
+				return nil, nil, -1, fmt.Errorf("encrypting split key with password: %w", err)
+			}
+			if len(striped) != len(mkey)*int(keyslot.Stripes()) {
+				return nil, nil, -1, fmt.Errorf("internal error: got %d stripe bytes, expected %d", len(striped), len(mkey)*int(keyslot.Stripes()))
+			}
+			stripes = append(stripes, striped)
+		}
+		keyslot.SetKeyMaterialOffset(uint32(headerLength / V1SectorSize))
+		if err := h.SetKeySlot(i, keyslot); err != nil {
+			return nil, nil, -1, fmt.Errorf("internal error: setting value for key slot %d: %w", i, err)
+		}
+		headerLength += len(mkey) * int(keyslot.Stripes())
+		headerLength = roundUpToMultiple(headerLength, V1AlignKeyslots)
+	}
+	headerLength = roundUpToMultiple(headerLength, V1SectorSize)
+
+	h.SetPayloadOffset(uint32(headerLength / V1SectorSize))
+	head := make([]byte, headerLength)
+	offset := copy(head, h[:])
+	offset = roundUpToMultiple(offset, V1AlignKeyslots)
+	for _, stripe := range stripes {
+		copy(head[offset:], stripe)
+		offset = roundUpToMultiple(offset+len(stripe), V1AlignKeyslots)
+	}
+	ivTweak := 0
+	encryptStream := func(plaintext []byte) ([]byte, error) {
+		ciphertext, err := v1encrypt(h.CipherName(), h.CipherMode(), ivTweak, mkey, plaintext, V1SectorSize, true)
+		ivTweak += len(plaintext) / V1SectorSize
+		return ciphertext, err
+	}
+	return head, encryptStream, V1SectorSize, nil
+}
+
+// EncryptV2 prepares to encrypt data using one or more passwords and the
+// specified cipher (or a default, if the specified cipher is "").
+//
+// Returns a fixed LUKSv2 header which contains keying information, a
+// function which will encrypt blocks of data in succession, and the size of
+// chunks of data that it expects.
+func EncryptV2(password []string, cipher string, payloadSectorSize int) ([]byte, func([]byte) ([]byte, error), int, error) {
+	if len(password) == 0 {
+		return nil, nil, -1, errors.New("at least one password is required")
+	}
+	if cipher == "" {
+		cipher = "aes-xts-plain64"
+	}
+	cipherSpec := strings.SplitN(cipher, "-", 3)
+	if len(cipherSpec) != 3 || len(cipherSpec[0]) == 0 || len(cipherSpec[1]) == 0 || len(cipherSpec[2]) == 0 {
+		return nil, nil, -1, fmt.Errorf("invalid cipher %q", cipher)
+	}
+	if payloadSectorSize == 0 {
+		payloadSectorSize = V2SectorSize
+	}
+	switch payloadSectorSize {
+	default:
+		return nil, nil, -1, fmt.Errorf("invalid sector size %d", payloadSectorSize)
+	case 512, 1024, 2048, 4096:
+	}
+
+	headerSalts := make([]byte, v1SaltSize*3)
+	n, err := rand.Read(headerSalts)
+	if err != nil {
+		return nil, nil, -1, err
+	}
+	if n != len(headerSalts) {
+		return nil, nil, -1, errors.New("short read")
+	}
+	hSalt1 := headerSalts[:v1SaltSize]
+	hSalt2 := headerSalts[v1SaltSize : v1SaltSize*2]
+	mkeySalt := headerSalts[v1SaltSize*2:]
+
+	roundHeaderSize := func(size int) (int, error) {
+		switch {
+		case size < 0x4000:
+			return 0x4000, nil
+		case size < 0x8000:
+			return 0x8000, nil
+		case size < 0x10000:
+			return 0x10000, nil
+		case size < 0x20000:
+			return 0x20000, nil
+		case size < 0x40000:
+			return 0x40000, nil
+		case size < 0x80000:
+			return 0x80000, nil
+		case size < 0x100000:
+			return 0x100000, nil
+		case size < 0x200000:
+			return 0x200000, nil
+		case size < 0x400000:
+			return 0x400000, nil
+		}
+		return 0, fmt.Errorf("internal error: unsupported header size %d", size)
+	}
+
+	var h1, h2 V2Header
+	if err := h1.SetMagic(V2Magic1); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting magic to v2: %w", err)
+	}
+	if err := h2.SetMagic(V2Magic2); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting magic to v2: %w", err)
+	}
+	if err := h1.SetVersion(2); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting version to 2: %w", err)
+	}
+	if err := h2.SetVersion(2); err != nil {
+		return nil, nil, -1, fmt.Errorf("setting version to 2: %w", err)
+	}
+	h1.SetSequenceID(1)
+	h2.SetSequenceID(1)
+	h1.SetLabel("")
+	h2.SetLabel("")
+	h1.SetChecksumAlgorithm("sha256")
+	h2.SetChecksumAlgorithm("sha256")
+	h1.SetSalt(hSalt1)
+	h2.SetSalt(hSalt2)
+	uuidString := uuid.NewString()
+	h1.SetUUID(uuidString)
+	h2.SetUUID(uuidString)
+	h1.SetHeaderOffset(0)
+	h2.SetHeaderOffset(0)
+	h1.SetChecksum(nil)
+	h2.SetChecksum(nil)
+
+	mkey := make([]byte, 32)
+	if cipherSpec[1] == "xts" {
+		mkey = make([]byte, 64)
+	}
+	n, err = rand.Read(mkey)
+	if err != nil {
+		return nil, nil, -1, fmt.Errorf("reading random data: %w", err)
+	}
+	if n != len(mkey) {
+		return nil, nil, -1, errors.New("short read")
+	}
+
+	tuningSalt := make([]byte, v1SaltSize)
+	hasher, err := hasherByName(h1.ChecksumAlgorithm())
+	if err != nil {
+		return nil, nil, -1, errors.New("internal error")
+	}
+	iterations := IterationsPBKDF2(tuningSalt, len(mkey), hasher)
+	timeCost := 1
+	threadsCost := 4
+	memoryCost := MemoryCostArgon2(tuningSalt, len(mkey), timeCost, threadsCost)
+	priority := V2JSONKeyslotPriorityNormal
+	var stripes [][]byte
+	var keyslots []V2JSONKeyslot
+
+	mdigest := pbkdf2.Key(mkey, mkeySalt, iterations, len(hasher().Sum([]byte{})), hasher)
+	digest0 := V2JSONDigest{
+		Type:     "pbkdf2",
+		Salt:     mkeySalt,
+		Digest:   mdigest,
+		Segments: []string{"0"},
+		V2JSONDigestPbkdf2: &V2JSONDigestPbkdf2{
+			Hash:       h1.ChecksumAlgorithm(),
+			Iterations: iterations,
+		},
+	}
+
+	for i := range password {
+		keyslotSalt := make([]byte, v1SaltSize)
+		n, err := rand.Read(keyslotSalt)
+		if err != nil {
+			return nil, nil, -1, err
+		}
+		if n != len(keyslotSalt) {
+			return nil, nil, -1, errors.New("short read")
+		}
+		key := argon2.Key([]byte(password[i]), keyslotSalt, uint32(timeCost), uint32(memoryCost), uint8(threadsCost), uint32(len(mkey)))
+		split, err := afSplit(mkey, hasher(), V2Stripes)
+		if err != nil {
+			return nil, nil, -1, fmt.Errorf("splitting: %w", err)
+		}
+		striped, err := v2encrypt(cipher, 0, key, split, V1SectorSize, false)
+		if err != nil {
+			return nil, nil, -1, fmt.Errorf("encrypting: %w", err)
+		}
+		stripes = append(stripes, striped)
+		keyslot := V2JSONKeyslot{
+			Type:    "luks2",
+			KeySize: len(mkey),
+			Area: V2JSONArea{
+				Type:   "raw",
+				Offset: 10000000, // gets updated later
+				Size:   int64(roundUpToMultiple(len(striped), V2AlignKeyslots)),
+				V2JSONAreaRaw: &V2JSONAreaRaw{
+					Encryption: cipher,
+					KeySize:    len(key),
+				},
+			},
+			Priority: &priority,
+			V2JSONKeyslotLUKS2: &V2JSONKeyslotLUKS2{
+				AF: V2JSONAF{
+					Type: "luks1",
+					V2JSONAFLUKS1: &V2JSONAFLUKS1{
+						Stripes: V2Stripes,
+						Hash:    h1.ChecksumAlgorithm(),
+					},
+				},
+				Kdf: V2JSONKdf{
+					Type: "argon2i",
+					Salt: keyslotSalt,
+					V2JSONKdfArgon2i: &V2JSONKdfArgon2i{
+						Time:   timeCost,
+						Memory: memoryCost,
+						CPUs:   threadsCost,
+					},
+				},
+			},
+		}
+		keyslots = append(keyslots, keyslot)
+		digest0.Keyslots = append(digest0.Keyslots, strconv.Itoa(i))
+	}
+
+	segment0 := V2JSONSegment{
+		Type:   "crypt",
+		Offset: "10000000", // gets updated later
+		Size:   "dynamic",
+		V2JSONSegmentCrypt: &V2JSONSegmentCrypt{
+			IVTweak:    0,
+			Encryption: cipher,
+			SectorSize: payloadSectorSize,
+		},
+	}
+
+	j := V2JSON{
+		Config:   V2JSONConfig{},
+		Keyslots: map[string]V2JSONKeyslot{},
+		Digests:  map[string]V2JSONDigest{},
+		Segments: map[string]V2JSONSegment{},
+		Tokens:   map[string]V2JSONToken{},
+	}
+rebuild:
+	j.Digests["0"] = digest0
+	j.Segments["0"] = segment0
+	encodedJSON, err := json.Marshal(j)
+	if err != nil {
+		return nil, nil, -1, err
+	}
+	headerPlusPaddedJsonSize, err := roundHeaderSize(int(V2SectorSize) /* binary header */ + len(encodedJSON) + 1)
+	if err != nil {
+		return nil, nil, -1, err
+	}
+	if j.Config.JsonSize != headerPlusPaddedJsonSize-V2SectorSize {
+		j.Config.JsonSize = headerPlusPaddedJsonSize - V2SectorSize
+		goto rebuild
+	}
+
+	if h1.HeaderSize() != uint64(headerPlusPaddedJsonSize) {
+		h1.SetHeaderSize(uint64(headerPlusPaddedJsonSize))
+		h2.SetHeaderSize(uint64(headerPlusPaddedJsonSize))
+		h1.SetHeaderOffset(0)
+		h2.SetHeaderOffset(uint64(headerPlusPaddedJsonSize))
+		goto rebuild
+	}
+
+	keyslotsOffset := h2.HeaderOffset() * 2
+	maxKeys := len(password)
+	if maxKeys < 64 {
+		maxKeys = 64
+	}
+	for i := 0; i < len(password); i++ {
+		oldOffset := keyslots[i].Area.Offset
+		keyslots[i].Area.Offset = int64(keyslotsOffset) + int64(roundUpToMultiple(len(mkey)*V2Stripes, V2AlignKeyslots))*int64(i)
+		j.Keyslots[strconv.Itoa(i)] = keyslots[i]
+		if keyslots[i].Area.Offset != oldOffset {
+			goto rebuild
+		}
+	}
+	keyslotsSize := roundUpToMultiple(len(mkey)*V2Stripes, V2AlignKeyslots) * maxKeys
+	if j.Config.KeyslotsSize != keyslotsSize {
+		j.Config.KeyslotsSize = keyslotsSize
+		goto rebuild
+	}
+
+	segmentOffsetInt := roundUpToMultiple(int(keyslotsOffset)+j.Config.KeyslotsSize, V2SectorSize)
+	segmentOffset := strconv.Itoa(segmentOffsetInt)
+	if segment0.Offset != segmentOffset {
+		segment0.Offset = segmentOffset
+		goto rebuild
+	}
+
+	d1 := hasher()
+	h1.SetChecksum(nil)
+	d1.Write(h1[:])
+	d1.Write(encodedJSON)
+	zeropad := make([]byte, headerPlusPaddedJsonSize-len(h1)-len(encodedJSON))
+	d1.Write(zeropad)
+	h1.SetChecksum(d1.Sum(nil))
+	d2 := hasher()
+	h2.SetChecksum(nil)
+	d2.Write(h2[:])
+	d2.Write(encodedJSON)
+	d1.Write(zeropad)
+	h2.SetChecksum(d2.Sum(nil))
+
+	head := make([]byte, segmentOffsetInt)
+	copy(head, h1[:])
+	copy(head[V2SectorSize:], encodedJSON)
+	copy(head[h2.HeaderOffset():], h2[:])
+	copy(head[h2.HeaderOffset()+V2SectorSize:], encodedJSON)
+	for i := 0; i < len(password); i++ {
+		iAsString := strconv.Itoa(i)
+		copy(head[j.Keyslots[iAsString].Area.Offset:], stripes[i])
+	}
+	ivTweak := 0
+	encryptStream := func(plaintext []byte) ([]byte, error) {
+		ciphertext, err := v2encrypt(cipher, ivTweak, mkey, plaintext, payloadSectorSize, true)
+		ivTweak += len(plaintext) / payloadSectorSize
+		return ciphertext, err
+	}
+	return head, encryptStream, segment0.SectorSize, nil
+}

vendor/github.com/containers/luksy/encryption.go

@@ -0,0 +1,537 @@
+package luksy
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"hash"
+	"io"
+	"strings"
+
+	"github.com/aead/serpent"
+	"golang.org/x/crypto/cast5"
+	"golang.org/x/crypto/ripemd160"
+	"golang.org/x/crypto/twofish"
+	"golang.org/x/crypto/xts"
+)
+
+func v1encrypt(cipherName, cipherMode string, ivTweak int, key []byte, plaintext []byte, sectorSize int, bulk bool) ([]byte, error) {
+	var err error
+	var newBlockCipher func([]byte) (cipher.Block, error)
+	ciphertext := make([]byte, len(plaintext))
+
+	switch cipherName {
+	case "aes":
+		newBlockCipher = aes.NewCipher
+	case "twofish":
+		newBlockCipher = func(key []byte) (cipher.Block, error) { return twofish.NewCipher(key) }
+	case "cast5":
+		newBlockCipher = func(key []byte) (cipher.Block, error) { return cast5.NewCipher(key) }
+	case "serpent":
+		newBlockCipher = serpent.NewCipher
+	default:
+		return nil, fmt.Errorf("unsupported cipher %s", cipherName)
+	}
+	if sectorSize == 0 {
+		sectorSize = V1SectorSize
+	}
+	switch sectorSize {
+	default:
+		return nil, fmt.Errorf("invalid sector size %d", sectorSize)
+	case 512, 1024, 2048, 4096:
+	}
+
+	switch cipherMode {
+	case "ecb":
+		cipher, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += cipher.BlockSize() {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			cipher.Encrypt(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft])
+		}
+	case "cbc-plain":
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := processed/sectorSize + ivTweak
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			iv0 := make([]byte, block.BlockSize())
+			binary.LittleEndian.PutUint32(iv0, uint32(ivValue))
+			cipher := cipher.NewCBCEncrypter(block, iv0)
+			cipher.CryptBlocks(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft])
+		}
+	case "cbc-plain64":
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := processed/sectorSize + ivTweak
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			iv0 := make([]byte, block.BlockSize())
+			binary.LittleEndian.PutUint64(iv0, uint64(ivValue))
+			cipher := cipher.NewCBCEncrypter(block, iv0)
+			cipher.CryptBlocks(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft])
+		}
+	case "cbc-essiv:sha256":
+		hasherName := strings.TrimPrefix(cipherMode, "cbc-essiv:")
+		hasher, err := hasherByName(hasherName)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption using hash %s: %w", hasherName, err)
+		}
+		h := hasher()
+		h.Write(key)
+		makeiv, err := newBlockCipher(h.Sum(nil))
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := (processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			plain0 := make([]byte, makeiv.BlockSize())
+			binary.LittleEndian.PutUint64(plain0, uint64(ivValue))
+			iv0 := make([]byte, makeiv.BlockSize())
+			makeiv.Encrypt(iv0, plain0)
+			cipher := cipher.NewCBCEncrypter(block, iv0)
+			cipher.CryptBlocks(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft])
+		}
+	case "xts-plain":
+		cipher, err := xts.NewCipher(newBlockCipher, key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			sector := uint64(processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				sector *= uint64(sectorSize / V1SectorSize)
+			}
+			sector = sector % 0x100000000
+			cipher.Encrypt(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft], sector)
+		}
+	case "xts-plain64":
+		cipher, err := xts.NewCipher(newBlockCipher, key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing encryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			sector := uint64(processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				sector *= uint64(sectorSize / V1SectorSize)
+			}
+			cipher.Encrypt(ciphertext[processed:processed+blockLeft], plaintext[processed:processed+blockLeft], sector)
+		}
+	default:
+		return nil, fmt.Errorf("unsupported cipher mode %s", cipherMode)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("cipher error: %w", err)
+	}
+	return ciphertext, nil
+}
+
+func v1decrypt(cipherName, cipherMode string, ivTweak int, key []byte, ciphertext []byte, sectorSize int, bulk bool) ([]byte, error) {
+	var err error
+	var newBlockCipher func([]byte) (cipher.Block, error)
+	plaintext := make([]byte, len(ciphertext))
+
+	switch cipherName {
+	case "aes":
+		newBlockCipher = aes.NewCipher
+	case "twofish":
+		newBlockCipher = func(key []byte) (cipher.Block, error) { return twofish.NewCipher(key) }
+	case "cast5":
+		newBlockCipher = func(key []byte) (cipher.Block, error) { return cast5.NewCipher(key) }
+	case "serpent":
+		newBlockCipher = serpent.NewCipher
+	default:
+		return nil, fmt.Errorf("unsupported cipher %s", cipherName)
+	}
+	if sectorSize == 0 {
+		sectorSize = V1SectorSize
+	}
+	switch sectorSize {
+	default:
+		return nil, fmt.Errorf("invalid sector size %d", sectorSize)
+	case 512, 1024, 2048, 4096:
+	}
+
+	switch cipherMode {
+	case "ecb":
+		cipher, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(ciphertext); processed += cipher.BlockSize() {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(ciphertext) {
+				blockLeft = len(ciphertext) - processed
+			}
+			cipher.Decrypt(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft])
+		}
+	case "cbc-plain":
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := processed/sectorSize + ivTweak
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			iv0 := make([]byte, block.BlockSize())
+			binary.LittleEndian.PutUint32(iv0, uint32(ivValue))
+			cipher := cipher.NewCBCDecrypter(block, iv0)
+			cipher.CryptBlocks(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft])
+		}
+	case "cbc-plain64":
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := processed/sectorSize + ivTweak
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			iv0 := make([]byte, block.BlockSize())
+			binary.LittleEndian.PutUint64(iv0, uint64(ivValue))
+			cipher := cipher.NewCBCDecrypter(block, iv0)
+			cipher.CryptBlocks(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft])
+		}
+	case "cbc-essiv:sha256":
+		hasherName := strings.TrimPrefix(cipherMode, "cbc-essiv:")
+		hasher, err := hasherByName(hasherName)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption using hash %s: %w", hasherName, err)
+		}
+		h := hasher()
+		h.Write(key)
+		makeiv, err := newBlockCipher(h.Sum(nil))
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		block, err := newBlockCipher(key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(plaintext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(plaintext) {
+				blockLeft = len(plaintext) - processed
+			}
+			ivValue := (processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				ivValue *= sectorSize / V1SectorSize
+			}
+			plain0 := make([]byte, makeiv.BlockSize())
+			binary.LittleEndian.PutUint64(plain0, uint64(ivValue))
+			iv0 := make([]byte, makeiv.BlockSize())
+			makeiv.Encrypt(iv0, plain0)
+			cipher := cipher.NewCBCDecrypter(block, iv0)
+			cipher.CryptBlocks(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft])
+		}
+	case "xts-plain":
+		cipher, err := xts.NewCipher(newBlockCipher, key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(ciphertext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(ciphertext) {
+				blockLeft = len(ciphertext) - processed
+			}
+			sector := uint64(processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				sector *= uint64(sectorSize / V1SectorSize)
+			}
+			sector = sector % 0x100000000
+			cipher.Decrypt(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft], sector)
+		}
+	case "xts-plain64":
+		cipher, err := xts.NewCipher(newBlockCipher, key)
+		if err != nil {
+			return nil, fmt.Errorf("initializing decryption: %w", err)
+		}
+		for processed := 0; processed < len(ciphertext); processed += sectorSize {
+			blockLeft := sectorSize
+			if processed+blockLeft > len(ciphertext) {
+				blockLeft = len(ciphertext) - processed
+			}
+			sector := uint64(processed/sectorSize + ivTweak)
+			if bulk { // iv_large_sectors is not being used
+				sector *= uint64(sectorSize / V1SectorSize)
+			}
+			cipher.Decrypt(plaintext[processed:processed+blockLeft], ciphertext[processed:processed+blockLeft], sector)
+		}
+	default:
+		return nil, fmt.Errorf("unsupported cipher mode %s", cipherMode)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("cipher error: %w", err)
+	}
+	return plaintext, nil
+}
+
+func v2encrypt(cipherSuite string, ivTweak int, key []byte, ciphertext []byte, sectorSize int, bulk bool) ([]byte, error) {
+	var cipherName, cipherMode string
+	switch {
+	default:
+		cipherSpec := strings.SplitN(cipherSuite, "-", 2)
+		if len(cipherSpec) < 2 {
+			return nil, fmt.Errorf("unrecognized cipher suite %q", cipherSuite)
+		}
+		cipherName = cipherSpec[0]
+		cipherMode = cipherSpec[1]
+	}
+	return v1encrypt(cipherName, cipherMode, ivTweak, key, ciphertext, sectorSize, bulk)
+}
+
+func v2decrypt(cipherSuite string, ivTweak int, key []byte, ciphertext []byte, sectorSize int, bulk bool) ([]byte, error) {
+	var cipherName, cipherMode string
+	switch {
+	default:
+		cipherSpec := strings.SplitN(cipherSuite, "-", 2)
+		if len(cipherSpec) < 2 {
+			return nil, fmt.Errorf("unrecognized cipher suite %q", cipherSuite)
+		}
+		cipherName = cipherSpec[0]
+		cipherMode = cipherSpec[1]
+	}
+	return v1decrypt(cipherName, cipherMode, ivTweak, key, ciphertext, sectorSize, bulk)
+}
+
+func diffuse(key []byte, h hash.Hash) []byte {
+	sum := make([]byte, len(key))
+	counter := uint32(0)
+	for summed := 0; summed < len(key); summed += h.Size() {
+		h.Reset()
+		var buf [4]byte
+		binary.BigEndian.PutUint32(buf[:], counter)
+		h.Write(buf[:])
+		needed := len(key) - summed
+		if needed > h.Size() {
+			needed = h.Size()
+		}
+		h.Write(key[summed : summed+needed])
+		partial := h.Sum(nil)
+		copy(sum[summed:summed+needed], partial)
+		counter++
+	}
+	return sum
+}
+
+func afMerge(splitKey []byte, h hash.Hash, keysize int, stripes int) ([]byte, error) {
+	if len(splitKey) != keysize*stripes {
+		return nil, fmt.Errorf("expected %d af bytes, got %d", keysize*stripes, len(splitKey))
+	}
+	d := make([]byte, keysize)
+	for i := 0; i < stripes-1; i++ {
+		for j := 0; j < keysize; j++ {
+			d[j] = d[j] ^ splitKey[i*keysize+j]
+		}
+		d = diffuse(d, h)
+	}
+	for j := 0; j < keysize; j++ {
+		d[j] = d[j] ^ splitKey[(stripes-1)*keysize+j]
+	}
+	return d, nil
+}
+
+func afSplit(key []byte, h hash.Hash, stripes int) ([]byte, error) {
+	keysize := len(key)
+	s := make([]byte, keysize*stripes)
+	d := make([]byte, keysize)
+	n, err := rand.Read(s[0 : (keysize-1)*stripes])
+	if err != nil {
+		return nil, err
+	}
+	if n != (keysize-1)*stripes {
+		return nil, fmt.Errorf("short read when attempting to read random data: %d < %d", n, (keysize-1)*stripes)
+	}
+	for i := 0; i < stripes-1; i++ {
+		for j := 0; j < keysize; j++ {
+			d[j] = d[j] ^ s[i*keysize+j]
+		}
+		d = diffuse(d, h)
+	}
+	for j := 0; j < keysize; j++ {
+		s[(stripes-1)*keysize+j] = d[j] ^ key[j]
+	}
+	return s, nil
+}
+
+func roundUpToMultiple(i, factor int) int {
+	if i < 0 {
+		return 0
+	}
+	return i + ((factor - (i % factor)) % factor)
+}
+
+func hasherByName(name string) (func() hash.Hash, error) {
+	switch name {
+	case "sha1":
+		return sha1.New, nil
+	case "sha256":
+		return sha256.New, nil
+	case "sha512":
+		return sha512.New, nil
+	case "ripemd160":
+		return ripemd160.New, nil
+	default:
+		return nil, fmt.Errorf("unsupported digest algorithm %q", name)
+	}
+}
+
+type wrapper struct {
+	fn                 func(plaintext []byte) ([]byte, error)
+	blockSize          int
+	buf                []byte
+	buffered, consumed int
+	reader             io.Reader
+	eof                bool
+	writer             io.Writer
+}
+
+func (w *wrapper) Write(buf []byte) (int, error) {
+	n := 0
+	for n < len(buf) {
+		nBuffered := copy(w.buf[w.buffered:], buf[n:])
+		w.buffered += nBuffered
+		n += nBuffered
+		if w.buffered == len(w.buf) {
+			processed, err := w.fn(w.buf)
+			if err != nil {
+				return n, err
+			}
+			nWritten, err := w.writer.Write(processed)
+			if err != nil {
+				return n, err
+			}
+			w.buffered -= nWritten
+			if nWritten != len(processed) {
+				return n, fmt.Errorf("short write: %d != %d", nWritten, len(processed))
+			}
+		}
+	}
+	return n, nil
+}
+
+func (w *wrapper) Read(buf []byte) (int, error) {
+	n := 0
+	for n < len(buf) {
+		nRead := copy(buf[n:], w.buf[w.consumed:])
+		w.consumed += nRead
+		n += nRead
+		if w.consumed == len(w.buf) && !w.eof {
+			nRead, err := w.reader.Read(w.buf)
+			w.eof = errors.Is(err, io.EOF)
+			if err != nil && !w.eof {
+				return n, err
+			}
+			if nRead != len(w.buf) && !w.eof {
+				return n, fmt.Errorf("short read: %d != %d", nRead, len(w.buf))
+			}
+			processed, err := w.fn(w.buf[:nRead])
+			if err != nil {
+				return n, err
+			}
+			w.buf = processed
+			w.consumed = 0
+		}
+	}
+	var eof error
+	if w.consumed == len(w.buf) && w.eof {
+		eof = io.EOF
+	}
+	return n, eof
+}
+
+func (w *wrapper) Close() error {
+	if w.writer != nil {
+		if w.buffered%w.blockSize != 0 {
+			w.buffered += copy(w.buf[w.buffered:], make([]byte, roundUpToMultiple(w.buffered%w.blockSize, w.blockSize)))
+		}
+		processed, err := w.fn(w.buf[:w.buffered])
+		if err != nil {
+			return err
+		}
+		nWritten, err := w.writer.Write(processed)
+		if err != nil {
+			return err
+		}
+		if nWritten != len(processed) {
+			return fmt.Errorf("short write: %d != %d", nWritten, len(processed))
+		}
+		w.buffered = 0
+	}
+	return nil
+}
+
+// EncryptWriter creates an io.WriteCloser which buffers writes through an
+// encryption function.  After writing a final block, the returned writer
+// should be closed.
+func EncryptWriter(fn func(plaintext []byte) ([]byte, error), writer io.Writer, blockSize int) io.WriteCloser {
+	bufferSize := roundUpToMultiple(1024*1024, blockSize)
+	return &wrapper{fn: fn, blockSize: blockSize, buf: make([]byte, bufferSize), writer: writer}
+}
+
+// DecryptReader creates an io.ReadCloser which buffers reads through a
+// decryption function.  When data will no longer be read, the returned reader
+// should be closed.
+func DecryptReader(fn func(ciphertext []byte) ([]byte, error), reader io.Reader, blockSize int) io.ReadCloser {
+	bufferSize := roundUpToMultiple(1024*1024, blockSize)
+	return &wrapper{fn: fn, blockSize: blockSize, buf: make([]byte, bufferSize), consumed: bufferSize, reader: reader}
+}

vendor/github.com/containers/luksy/luks.go

@@ -0,0 +1,75 @@
+package luksy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+// ReadHeaderOptions can control some of what ReadHeaders() does.
+type ReadHeaderOptions struct{}
+
+// ReadHeaders reads LUKS headers from the specified file, returning either a
+// LUKSv1 header, or two LUKSv2 headers and a LUKSv2 JSON block, depending on
+// which format is detected.
+func ReadHeaders(f *os.File, options ReadHeaderOptions) (*V1Header, *V2Header, *V2Header, *V2JSON, error) {
+	var v1 V1Header
+	var v2a, v2b V2Header
+	n, err := f.ReadAt(v2a[:], 0)
+	if err != nil {
+		return nil, nil, nil, nil, err
+	}
+	if n != len(v2a) {
+		return nil, nil, nil, nil, fmt.Errorf("only able to read %d bytes - file truncated?", n)
+	}
+	if n, err = f.ReadAt(v1[:], 0); err != nil {
+		return nil, nil, nil, nil, err
+	}
+	if n != len(v1) {
+		return nil, nil, nil, nil, fmt.Errorf("only able to read %d bytes - file truncated?", n)
+	}
+	if v2a.Magic() != V2Magic1 {
+		return nil, nil, nil, nil, fmt.Errorf("internal error: magic mismatch in LUKS header (%q)", v2a.Magic())
+	}
+	switch v2a.Version() { // is it a v1 header, or the first v2 header?
+	case 1:
+		return &v1, nil, nil, nil, nil
+	case 2:
+		size := v2a.HeaderSize()
+		if size > 0x7fffffffffffffff {
+			return nil, nil, nil, nil, fmt.Errorf("unsupported header size while looking for second header")
+		}
+		if size < 4096 {
+			return nil, nil, nil, nil, fmt.Errorf("unsupported header size while looking for JSON data")
+		}
+		if n, err = f.ReadAt(v2b[:], int64(size)); err != nil || n != len(v2b) {
+			if err == nil && n != len(v2b) {
+				err = fmt.Errorf("short read: read only %d bytes, should have read %d", n, len(v2b))
+			}
+			return nil, nil, nil, nil, err
+		}
+		if v2b.Magic() != V2Magic2 {
+			return nil, nil, nil, nil, fmt.Errorf("internal error: magic mismatch in second LUKS header (%q)", v2b.Magic())
+		}
+		jsonSize := size - 4096
+		buf := make([]byte, jsonSize)
+		n, err = f.ReadAt(buf[:], 4096)
+		if err != nil {
+			return nil, nil, nil, nil, fmt.Errorf("internal error: while reading JSON data: %w", err)
+		}
+		if n < 0 || uint64(n) != jsonSize {
+			return nil, nil, nil, nil, fmt.Errorf("internal error: short read while reading JSON data (wanted %d, got %d)", jsonSize, n)
+		}
+		var jsonData V2JSON
+		buf = bytes.TrimRightFunc(buf, func(r rune) bool { return r == 0 })
+		if err = json.Unmarshal(buf, &jsonData); err != nil {
+			return nil, nil, nil, nil, fmt.Errorf("internal error: decoding JSON data: %w", err)
+		}
+		if uint64(jsonData.Config.JsonSize) != jsonSize {
+			return nil, nil, nil, nil, fmt.Errorf("internal error: JSON data size mismatch: (expected %d, used %d)", jsonData.Config.JsonSize, jsonSize)
+		}
+		return nil, &v2a, &v2b, &jsonData, nil
+	}
+	return nil, nil, nil, nil, fmt.Errorf("error reading LUKS header - magic identifier not found")
+}

vendor/github.com/containers/luksy/tune.go

@@ -0,0 +1,55 @@
+package luksy
+
+import (
+	"hash"
+	"time"
+
+	"golang.org/x/crypto/argon2"
+	"golang.org/x/crypto/pbkdf2"
+)
+
+func durationOf(f func()) time.Duration {
+	start := time.Now()
+	f()
+	return time.Since(start)
+}
+
+func IterationsPBKDF2(salt []byte, keyLen int, h func() hash.Hash) int {
+	iterations := 2
+	var d time.Duration
+	for d < time.Second {
+		d = durationOf(func() {
+			_ = pbkdf2.Key([]byte{}, salt, iterations, keyLen, h)
+		})
+		if d < time.Second/10 {
+			iterations *= 2
+		} else {
+			return iterations * int(time.Second) / int(d)
+		}
+	}
+	return iterations
+}
+
+func memoryCostArgon2(salt []byte, keyLen, timeCost, threadsCost int, kdf func([]byte, []byte, uint32, uint32, uint8, uint32) []byte) int {
+	memoryCost := 2
+	var d time.Duration
+	for d < time.Second {
+		d = durationOf(func() {
+			_ = kdf([]byte{}, salt, uint32(timeCost), uint32(memoryCost), uint8(threadsCost), uint32(keyLen))
+		})
+		if d < time.Second/10 {
+			memoryCost *= 2
+		} else {
+			return memoryCost * int(time.Second) / int(d)
+		}
+	}
+	return memoryCost
+}
+
+func MemoryCostArgon2(salt []byte, keyLen, timeCost, threadsCost int) int {
+	return memoryCostArgon2(salt, keyLen, timeCost, threadsCost, argon2.Key)
+}
+
+func MemoryCostArgon2i(salt []byte, keyLen, timeCost, threadsCost int) int {
+	return memoryCostArgon2(salt, keyLen, timeCost, threadsCost, argon2.IDKey)
+}

vendor/github.com/containers/luksy/v1header.go

@@ -0,0 +1,321 @@
+package luksy
+
+import (
+	"encoding/binary"
+	"fmt"
+	"syscall"
+)
+
+type (
+	V1Header  [592]uint8
+	V1KeySlot [48]uint8
+)
+
+const (
+	// Mostly verbatim from LUKS1 On-Disk Format Specification version 1.2.3
+	V1Magic               = "LUKS\xba\xbe"
+	v1MagicStart          = 0
+	v1MagicLength         = 6
+	v1VersionStart        = v1MagicStart + v1MagicLength
+	v1VersionLength       = 2
+	v1CipherNameStart     = v1VersionStart + v1VersionLength
+	v1CipherNameLength    = 32
+	v1CipherModeStart     = v1CipherNameStart + v1CipherNameLength
+	v1CipherModeLength    = 32
+	v1HashSpecStart       = v1CipherModeStart + v1CipherModeLength
+	v1HashSpecLength      = 32
+	v1PayloadOffsetStart  = v1HashSpecStart + v1HashSpecLength
+	v1PayloadOffsetLength = 4
+	v1KeyBytesStart       = v1PayloadOffsetStart + v1PayloadOffsetLength
+	v1KeyBytesLength      = 4
+	v1MKDigestStart       = v1KeyBytesStart + v1KeyBytesLength
+	v1MKDigestLength      = v1DigestSize
+	v1MKDigestSaltStart   = v1MKDigestStart + v1MKDigestLength
+	v1MKDigestSaltLength  = v1SaltSize
+	v1MKDigestIterStart   = v1MKDigestSaltStart + v1MKDigestSaltLength
+	v1MKDigestIterLength  = 4
+	v1UUIDStart           = v1MKDigestIterStart + v1MKDigestIterLength
+	v1UUIDLength          = 40
+	v1KeySlot1Start       = v1UUIDStart + v1UUIDLength
+	v1KeySlot1Length      = 48
+	v1KeySlot2Start       = v1KeySlot1Start + v1KeySlot1Length
+	v1KeySlot2Length      = 48
+	v1KeySlot3Start       = v1KeySlot2Start + v1KeySlot2Length
+	v1KeySlot3Length      = 48
+	v1KeySlot4Start       = v1KeySlot3Start + v1KeySlot3Length
+	v1KeySlot4Length      = 48
+	v1KeySlot5Start       = v1KeySlot4Start + v1KeySlot4Length
+	v1KeySlot5Length      = 48
+	v1KeySlot6Start       = v1KeySlot5Start + v1KeySlot5Length
+	v1KeySlot6Length      = 48
+	v1KeySlot7Start       = v1KeySlot6Start + v1KeySlot6Length
+	v1KeySlot7Length      = 48
+	v1KeySlot8Start       = v1KeySlot7Start + v1KeySlot7Length
+	v1KeySlot8Length      = 48
+	v1HeaderStructSize    = v1KeySlot8Start + v1KeySlot8Length
+
+	v1KeySlotActiveStart             = 0
+	v1KeySlotActiveLength            = 4
+	v1KeySlotIterationsStart         = v1KeySlotActiveStart + v1KeySlotActiveLength
+	v1KeySlotIterationsLength        = 4
+	v1KeySlotSaltStart               = v1KeySlotIterationsStart + v1KeySlotIterationsLength
+	v1KeySlotSaltLength              = v1SaltSize
+	v1KeySlotKeyMaterialOffsetStart  = v1KeySlotSaltStart + v1KeySlotSaltLength
+	v1KeySlotKeyMaterialOffsetLength = 4
+	v1KeySlotStripesStart            = v1KeySlotKeyMaterialOffsetStart + v1KeySlotKeyMaterialOffsetLength
+	v1KeySlotStripesLength           = 4
+	v1KeySlotStructSize              = v1KeySlotStripesStart + v1KeySlotStripesLength
+
+	v1DigestSize               = 20
+	v1SaltSize                 = 32
+	v1NumKeys                  = 8
+	v1KeySlotActiveKeyDisabled = 0x0000dead
+	v1KeySlotActiveKeyEnabled  = 0x00ac71f3
+	V1Stripes                  = 4000
+	V1AlignKeyslots            = 4096
+	V1SectorSize               = 512
+)
+
+func (h V1Header) readu2(offset int) uint16 {
+	return binary.BigEndian.Uint16(h[offset:])
+}
+
+func (h V1Header) readu4(offset int) uint32 {
+	return binary.BigEndian.Uint32(h[offset:])
+}
+
+func (h *V1Header) writeu2(offset int, value uint16) {
+	binary.BigEndian.PutUint16(h[offset:], value)
+}
+
+func (h *V1Header) writeu4(offset int, value uint32) {
+	binary.BigEndian.PutUint32(h[offset:], value)
+}
+
+func (h V1Header) Magic() string {
+	return trimZeroPad(string(h[v1MagicStart : v1MagicStart+v1MagicLength]))
+}
+
+func (h *V1Header) SetMagic(magic string) error {
+	switch magic {
+	case V1Magic:
+		copy(h[v1MagicStart:v1MagicStart+v1MagicLength], []uint8(magic))
+		return nil
+	}
+	return fmt.Errorf("magic %q not acceptable, only %q is an acceptable magic value: %w", magic, V1Magic, syscall.EINVAL)
+}
+
+func (h V1Header) Version() uint16 {
+	return h.readu2(v1VersionStart)
+}
+
+func (h *V1Header) SetVersion(version uint16) error {
+	switch version {
+	case 1:
+		h.writeu2(v1VersionStart, version)
+		return nil
+	}
+	return fmt.Errorf("version %d not acceptable, only 1 is an acceptable version: %w", version, syscall.EINVAL)
+}
+
+func (h *V1Header) setZeroString(offset int, value string, length int) {
+	for len(value) < length {
+		value = value + "\000"
+	}
+	copy(h[offset:offset+length], []uint8(value))
+}
+
+func (h *V1Header) setInt8(offset int, s []uint8, length int) {
+	t := make([]byte, length)
+	copy(t, s)
+	copy(h[offset:offset+length], s)
+}
+
+func (h V1Header) CipherName() string {
+	return trimZeroPad(string(h[v1CipherNameStart : v1CipherNameStart+v1CipherNameLength]))
+}
+
+func (h *V1Header) SetCipherName(name string) {
+	h.setZeroString(v1CipherNameStart, name, v1CipherNameLength)
+}
+
+func (h V1Header) CipherMode() string {
+	return trimZeroPad(string(h[v1CipherModeStart : v1CipherModeStart+v1CipherModeLength]))
+}
+
+func (h *V1Header) SetCipherMode(mode string) {
+	h.setZeroString(v1CipherModeStart, mode, v1CipherModeLength)
+}
+
+func (h V1Header) HashSpec() string {
+	return trimZeroPad(string(h[v1HashSpecStart : v1HashSpecStart+v1HashSpecLength]))
+}
+
+func (h *V1Header) SetHashSpec(spec string) {
+	h.setZeroString(v1HashSpecStart, spec, v1HashSpecLength)
+}
+
+func (h V1Header) PayloadOffset() uint32 {
+	return h.readu4(v1PayloadOffsetStart)
+}
+
+func (h *V1Header) SetPayloadOffset(offset uint32) {
+	h.writeu4(v1PayloadOffsetStart, offset)
+}
+
+func (h V1Header) KeyBytes() uint32 {
+	return h.readu4(v1KeyBytesStart)
+}
+
+func (h *V1Header) SetKeyBytes(bytes uint32) {
+	h.writeu4(v1KeyBytesStart, bytes)
+}
+
+func (h *V1Header) KeySlot(slot int) (V1KeySlot, error) {
+	var ks V1KeySlot
+	if slot < 0 || slot >= v1NumKeys {
+		return ks, fmt.Errorf("invalid key slot number (must be 0..%d)", v1NumKeys-1)
+	}
+	switch slot {
+	case 0:
+		copy(ks[:], h[v1KeySlot1Start:v1KeySlot1Start+v1KeySlot1Length])
+	case 1:
+		copy(ks[:], h[v1KeySlot2Start:v1KeySlot2Start+v1KeySlot2Length])
+	case 2:
+		copy(ks[:], h[v1KeySlot3Start:v1KeySlot3Start+v1KeySlot3Length])
+	case 3:
+		copy(ks[:], h[v1KeySlot4Start:v1KeySlot4Start+v1KeySlot4Length])
+	case 4:
+		copy(ks[:], h[v1KeySlot5Start:v1KeySlot5Start+v1KeySlot5Length])
+	case 5:
+		copy(ks[:], h[v1KeySlot6Start:v1KeySlot6Start+v1KeySlot6Length])
+	case 6:
+		copy(ks[:], h[v1KeySlot7Start:v1KeySlot7Start+v1KeySlot7Length])
+	case 7:
+		copy(ks[:], h[v1KeySlot8Start:v1KeySlot8Start+v1KeySlot8Length])
+	}
+	return ks, nil
+}
+
+func (h *V1Header) SetKeySlot(slot int, ks V1KeySlot) error {
+	if slot < 0 || slot >= v1NumKeys {
+		return fmt.Errorf("invalid key slot number (must be 0..%d)", v1NumKeys-1)
+	}
+	switch slot {
+	case 0:
+		copy(h[v1KeySlot1Start:v1KeySlot1Start+v1KeySlot1Length], ks[:])
+	case 1:
+		copy(h[v1KeySlot2Start:v1KeySlot2Start+v1KeySlot2Length], ks[:])
+	case 2:
+		copy(h[v1KeySlot3Start:v1KeySlot3Start+v1KeySlot3Length], ks[:])
+	case 3:
+		copy(h[v1KeySlot4Start:v1KeySlot4Start+v1KeySlot4Length], ks[:])
+	case 4:
+		copy(h[v1KeySlot5Start:v1KeySlot5Start+v1KeySlot5Length], ks[:])
+	case 5:
+		copy(h[v1KeySlot6Start:v1KeySlot6Start+v1KeySlot6Length], ks[:])
+	case 6:
+		copy(h[v1KeySlot7Start:v1KeySlot7Start+v1KeySlot7Length], ks[:])
+	case 7:
+		copy(h[v1KeySlot8Start:v1KeySlot8Start+v1KeySlot8Length], ks[:])
+	}
+	return nil
+}
+
+func (h V1Header) MKDigest() []uint8 {
+	return dupInt8(h[v1MKDigestStart : v1MKDigestStart+v1MKDigestLength])
+}
+
+func (h *V1Header) SetMKDigest(digest []uint8) {
+	h.setInt8(v1MKDigestStart, digest, v1MKDigestLength)
+}
+
+func (h V1Header) MKDigestSalt() []uint8 {
+	return dupInt8(h[v1MKDigestSaltStart : v1MKDigestSaltStart+v1MKDigestSaltLength])
+}
+
+func (h *V1Header) SetMKDigestSalt(salt []uint8) {
+	h.setInt8(v1MKDigestSaltStart, salt, v1MKDigestSaltLength)
+}
+
+func (h V1Header) MKDigestIter() uint32 {
+	return h.readu4(v1MKDigestIterStart)
+}
+
+func (h *V1Header) SetMKDigestIter(bytes uint32) {
+	h.writeu4(v1MKDigestIterStart, bytes)
+}
+
+func (h V1Header) UUID() string {
+	return trimZeroPad(string(h[v1UUIDStart : v1UUIDStart+v1UUIDLength]))
+}
+
+func (h *V1Header) SetUUID(uuid string) {
+	h.setZeroString(v1UUIDStart, uuid, v1UUIDLength)
+}
+
+func (s V1KeySlot) readu4(offset int) uint32 {
+	return binary.BigEndian.Uint32(s[offset:])
+}
+
+func (s *V1KeySlot) writeu4(offset int, value uint32) {
+	binary.BigEndian.PutUint32(s[offset:], value)
+}
+
+func (s *V1KeySlot) setInt8(offset int, i []uint8, length int) {
+	for len(s) < length {
+		i = append(i, 0)
+	}
+	copy(s[offset:offset+length], i)
+}
+
+func (s V1KeySlot) Active() (bool, error) {
+	active := s.readu4(v1KeySlotActiveStart)
+	switch active {
+	case v1KeySlotActiveKeyDisabled:
+		return false, nil
+	case v1KeySlotActiveKeyEnabled:
+		return true, nil
+	}
+	return false, fmt.Errorf("got invalid active value %#0x: %w", active, syscall.EINVAL)
+}
+
+func (s *V1KeySlot) SetActive(active bool) {
+	if active {
+		s.writeu4(v1KeySlotActiveStart, v1KeySlotActiveKeyEnabled)
+		return
+	}
+	s.writeu4(v1KeySlotActiveStart, v1KeySlotActiveKeyDisabled)
+}
+
+func (s V1KeySlot) Iterations() uint32 {
+	return s.readu4(v1KeySlotIterationsStart)
+}
+
+func (s *V1KeySlot) SetIterations(iterations uint32) {
+	s.writeu4(v1KeySlotIterationsStart, iterations)
+}
+
+func (s V1KeySlot) KeySlotSalt() []uint8 {
+	return dupInt8(s[v1KeySlotSaltStart : v1KeySlotSaltStart+v1KeySlotSaltLength])
+}
+
+func (s *V1KeySlot) SetKeySlotSalt(salt []uint8) {
+	s.setInt8(v1KeySlotSaltStart, salt, v1KeySlotSaltLength)
+}
+
+func (s V1KeySlot) KeyMaterialOffset() uint32 {
+	return s.readu4(v1KeySlotKeyMaterialOffsetStart)
+}
+
+func (s *V1KeySlot) SetKeyMaterialOffset(material uint32) {
+	s.writeu4(v1KeySlotKeyMaterialOffsetStart, material)
+}
+
+func (s V1KeySlot) Stripes() uint32 {
+	return s.readu4(v1KeySlotStripesStart)
+}
+
+func (s *V1KeySlot) SetStripes(stripes uint32) {
+	s.writeu4(v1KeySlotStripesStart, stripes)
+}

vendor/github.com/containers/luksy/v2header.go

@@ -0,0 +1,203 @@
+package luksy
+
+import (
+	"fmt"
+	"strings"
+	"syscall"
+)
+
+type V2Header [4096]uint8
+
+const (
+	// Mostly verbatim from LUKS2 On-Disk Format Specification version 1.1.1
+	V2Magic1                  = V1Magic
+	V2Magic2                  = "SKUL\xba\xbe"
+	v2MagicStart              = 0
+	v2MagicLength             = 6
+	v2VersionStart            = v2MagicStart + v2MagicLength
+	v2VersionLength           = 2
+	v2HeaderSizeStart         = v2VersionStart + v2VersionLength
+	v2HeaderSizeLength        = 8
+	v2SequenceIDStart         = v2HeaderSizeStart + v2HeaderSizeLength
+	v2SequenceIDLength        = 8
+	v2LabelStart              = v2SequenceIDStart + v2SequenceIDLength
+	v2LabelLength             = 48
+	v2ChecksumAlgorithmStart  = v2LabelStart + v2LabelLength
+	v2ChecksumAlgorithmLength = 32
+	v2SaltStart               = v2ChecksumAlgorithmStart + v2ChecksumAlgorithmLength
+	v2SaltLength              = 64
+	v2UUIDStart               = v2SaltStart + v2SaltLength
+	v2UUIDLength              = 40
+	v2SubsystemStart          = v2UUIDStart + v2UUIDLength
+	v2SubsystemLength         = v2LabelLength
+	v2HeaderOffsetStart       = v2SubsystemStart + v2SubsystemLength
+	v2HeaderOffsetLength      = 8
+	v2Padding1Start           = v2HeaderOffsetStart + v2HeaderOffsetLength
+	v2Padding1Length          = 184
+	v2ChecksumStart           = v2Padding1Start + v2Padding1Length
+	v2ChecksumLength          = 64
+	v2Padding4096Start        = v2ChecksumStart + v2ChecksumLength
+	v2Padding4096Length       = 7 * 512
+	v2HeaderStructSize        = v2Padding4096Start + v2Padding4096Length
+
+	V2Stripes       = 4000
+	V2AlignKeyslots = 4096
+	V2SectorSize    = 4096
+)
+
+func (h V2Header) Magic() string {
+	return string(h[v2MagicStart : v2MagicStart+v2MagicLength])
+}
+
+func (h *V2Header) SetMagic(magic string) error {
+	switch magic {
+	case V2Magic1, V2Magic2:
+		copy(h[v2MagicStart:v2MagicStart+v2MagicLength], []uint8(magic))
+		return nil
+	}
+	return fmt.Errorf("magic %q not acceptable, only %q and %q are acceptable magic values: %w", magic, V2Magic1, V2Magic2, syscall.EINVAL)
+}
+
+func (h V2Header) readu2(offset int) uint16 {
+	t := uint16(0)
+	for i := 0; i < 2; i++ {
+		t = (t << 8) + uint16(h[offset+i])
+	}
+	return t
+}
+
+func (h V2Header) readu8(offset int) uint64 {
+	t := uint64(0)
+	for i := 0; i < 8; i++ {
+		t = (t << 8) + uint64(h[offset+i])
+	}
+	return t
+}
+
+func (h *V2Header) writeu2(offset int, value uint16) {
+	t := value
+	for i := 0; i < 2; i++ {
+		h[offset+1-i] = uint8(uint64(t) & 0xff)
+		t >>= 8
+	}
+}
+
+func (h *V2Header) writeu8(offset int, value uint64) {
+	t := value
+	for i := 0; i < 8; i++ {
+		h[offset+7-i] = uint8(uint64(t) & 0xff)
+		t >>= 8
+	}
+}
+
+func (h V2Header) Version() uint16 {
+	return h.readu2(v2VersionStart)
+}
+
+func (h *V2Header) SetVersion(version uint16) error {
+	switch version {
+	case 2:
+		h.writeu2(v2VersionStart, version)
+		return nil
+	}
+	return fmt.Errorf("version %d not acceptable, only 2 is an acceptable version: %w", version, syscall.EINVAL)
+}
+
+func (h V2Header) HeaderSize() uint64 {
+	return h.readu8(v2HeaderSizeStart)
+}
+
+func (h *V2Header) SetHeaderSize(size uint64) {
+	h.writeu8(v2HeaderSizeStart, size)
+}
+
+func (h V2Header) SequenceID() uint64 {
+	return h.readu8(v2SequenceIDStart)
+}
+
+func (h *V2Header) SetSequenceID(id uint64) {
+	h.writeu8(v2SequenceIDStart, id)
+}
+
+func trimZeroPad(s string) string {
+	return strings.TrimRightFunc(s, func(r rune) bool { return r == 0 })
+}
+
+func (h V2Header) Label() string {
+	return trimZeroPad(string(h[v2LabelStart : v2LabelStart+v2LabelLength]))
+}
+
+func (h *V2Header) setZeroString(offset int, value string, length int) {
+	for len(value) < length {
+		value = value + "\000"
+	}
+	copy(h[offset:offset+length], []uint8(value))
+}
+
+func (h *V2Header) SetLabel(label string) {
+	h.setZeroString(v2LabelStart, label, v2LabelLength)
+}
+
+func (h V2Header) ChecksumAlgorithm() string {
+	return trimZeroPad(string(h[v2ChecksumAlgorithmStart : v2ChecksumAlgorithmStart+v2ChecksumAlgorithmLength]))
+}
+
+func (h *V2Header) SetChecksumAlgorithm(alg string) {
+	h.setZeroString(v2ChecksumAlgorithmStart, alg, v2ChecksumAlgorithmLength)
+}
+
+func dupInt8(s []uint8) []uint8 {
+	c := make([]uint8, len(s))
+	copy(c, s)
+	return c
+}
+
+func (h *V2Header) setInt8(offset int, s []uint8, length int) {
+	t := make([]byte, length)
+	copy(t, s)
+	copy(h[offset:offset+length], t)
+}
+
+func (h V2Header) Salt() []uint8 {
+	return dupInt8(h[v2SaltStart : v2SaltStart+v2SaltLength])
+}
+
+func (h *V2Header) SetSalt(salt []uint8) {
+	h.setInt8(v2SaltStart, salt, v2SaltLength)
+}
+
+func (h V2Header) UUID() string {
+	return trimZeroPad(string(h[v2UUIDStart : v2UUIDStart+v2UUIDLength]))
+}
+
+func (h *V2Header) SetUUID(uuid string) {
+	h.setZeroString(v2UUIDStart, uuid, v2UUIDLength)
+}
+
+func (h V2Header) Subsystem() string {
+	return trimZeroPad(string(h[v2SubsystemStart : v2SubsystemStart+v2SubsystemLength]))
+}
+
+func (h *V2Header) SetSubsystem(ss string) {
+	h.setZeroString(v2SubsystemStart, ss, v2SubsystemLength)
+}
+
+func (h V2Header) HeaderOffset() uint64 {
+	return h.readu8(v2HeaderOffsetStart)
+}
+
+func (h *V2Header) SetHeaderOffset(o uint64) {
+	h.writeu8(v2HeaderOffsetStart, o)
+}
+
+func (h V2Header) Checksum() []uint8 {
+	hasher, err := hasherByName(h.ChecksumAlgorithm())
+	if err == nil {
+		return dupInt8(h[v2ChecksumStart : v2ChecksumStart+hasher().Size()])
+	}
+	return dupInt8(h[v2ChecksumStart : v2ChecksumStart+v2ChecksumLength])
+}
+
+func (h *V2Header) SetChecksum(sum []uint8) {
+	h.setInt8(v2ChecksumStart, sum, v2ChecksumLength)
+}

vendor/github.com/containers/luksy/v2json.go

@@ -0,0 +1,157 @@
+package luksy
+
+type V2JSON struct {
+	Config   V2JSONConfig             `json:"config"`
+	Keyslots map[string]V2JSONKeyslot `json:"keyslots"`
+	Digests  map[string]V2JSONDigest  `json:"digests"`
+	Segments map[string]V2JSONSegment `json:"segments"`
+	Tokens   map[string]V2JSONToken   `json:"tokens"`
+}
+
+type V2JSONKeyslotPriority int
+
+func (p V2JSONKeyslotPriority) String() string {
+	switch p {
+	case V2JSONKeyslotPriorityIgnore:
+		return "ignore"
+	case V2JSONKeyslotPriorityNormal:
+		return "normal"
+	case V2JSONKeyslotPriorityHigh:
+		return "high"
+	}
+	return "unknown"
+}
+
+const (
+	V2JSONKeyslotPriorityIgnore = V2JSONKeyslotPriority(0)
+	V2JSONKeyslotPriorityNormal = V2JSONKeyslotPriority(1)
+	V2JSONKeyslotPriorityHigh   = V2JSONKeyslotPriority(2)
+)
+
+type V2JSONKeyslot struct {
+	Type                    string                 `json:"type"`
+	KeySize                 int                    `json:"key_size"`
+	Area                    V2JSONArea             `json:"area"`
+	Priority                *V2JSONKeyslotPriority `json:"priority,omitempty"`
+	*V2JSONKeyslotLUKS2                            // type = "luks2"
+	*V2JSONKeyslotReencrypt                        // type = "reencrypt"
+}
+
+type V2JSONKeyslotLUKS2 struct {
+	AF  V2JSONAF  `json:"af"`
+	Kdf V2JSONKdf `json:"kdf"`
+}
+
+type V2JSONKeyslotReencrypt struct {
+	Mode      string `json:"mode"`      // only "reencrypt", "encrypt", "decrypt"
+	Direction string `json:"direction"` // only "forward", "backward"
+}
+
+type V2JSONArea struct {
+	Type                         string `json:"type"` // only "raw", "none", "journal", "checksum", "datashift", "datashift-journal", "datashift-checksum"
+	Offset                       int64  `json:"offset,string"`
+	Size                         int64  `json:"size,string"`
+	*V2JSONAreaRaw                      // type = "raw"
+	*V2JSONAreaChecksum                 // type = "checksum"
+	*V2JSONAreaDatashift                // type = "datashift"
+	*V2JSONAreaDatashiftChecksum        // type = "datashift-checksum"
+}
+
+type V2JSONAreaRaw struct {
+	Encryption string `json:"encryption"`
+	KeySize    int    `json:"key_size"`
+}
+
+type V2JSONAreaChecksum struct {
+	Hash       string `json:"hash"`
+	SectorSize int    `json:"sector_size"`
+}
+
+type V2JSONAreaDatashift struct {
+	ShiftSize int `json:"shift_size,string"`
+}
+
+type V2JSONAreaDatashiftChecksum struct {
+	V2JSONAreaChecksum
+	V2JSONAreaDatashift
+}
+
+type V2JSONAF struct {
+	Type           string `json:"type"` // "luks1"
+	*V2JSONAFLUKS1        // type == "luks1"
+}
+
+type V2JSONAFLUKS1 struct {
+	Stripes int    `json:"stripes"` // 4000
+	Hash    string `json:"hash"`    // "sha256"
+}
+
+type V2JSONKdf struct {
+	Type              string `json:"type"`
+	Salt              []byte `json:"salt"`
+	*V2JSONKdfPbkdf2         // type = "pbkdf2"
+	*V2JSONKdfArgon2i        // type = "argon2i" or type = "argon2id"
+}
+
+type V2JSONKdfPbkdf2 struct {
+	Hash       string `json:"hash"`
+	Iterations int    `json:"iterations"`
+}
+
+type V2JSONKdfArgon2i struct {
+	Time   int `json:"time"`
+	Memory int `json:"memory"`
+	CPUs   int `json:"cpus"`
+}
+
+type V2JSONSegment struct {
+	Type                string              `json:"type"` // only "linear", "crypt"
+	Offset              string              `json:"offset"`
+	Size                string              `json:"size"` // numeric value or "dynamic"
+	Flags               []string            `json:"flags,omitempty"`
+	*V2JSONSegmentCrypt `json:",omitempty"` // type = "crypt"
+}
+
+type V2JSONSegmentCrypt struct {
+	IVTweak    int                     `json:"iv_tweak,string"`
+	Encryption string                  `json:"encryption"`
+	SectorSize int                     `json:"sector_size"` // 512 or 1024 or 2048 or 4096
+	Integrity  *V2JSONSegmentIntegrity `json:"integrity,omitempty"`
+}
+
+type V2JSONSegmentIntegrity struct {
+	Type              string `json:"type"`
+	JournalEncryption string `json:"journal_encryption"`
+	JournalIntegrity  string `json:"journal_integrity"`
+}
+
+type V2JSONDigest struct {
+	Type                string   `json:"type"`
+	Keyslots            []string `json:"keyslots"`
+	Segments            []string `json:"segments"`
+	Salt                []byte   `json:"salt"`
+	Digest              []byte   `json:"digest"`
+	*V2JSONDigestPbkdf2          // type == "pbkdf2"
+}
+
+type V2JSONDigestPbkdf2 struct {
+	Hash       string `json:"hash"`
+	Iterations int    `json:"iterations"`
+}
+
+type V2JSONConfig struct {
+	JsonSize     int      `json:"json_size,string"`
+	KeyslotsSize int      `json:"keyslots_size,string,omitempty"`
+	Flags        []string `json:"flags,omitempty"` // one or more of "allow-discards", "same-cpu-crypt", "submit-from-crypt-cpus", "no-journal", "no-read-workqueue", "no-write-workqueue"
+	Requirements []string `json:"requirements,omitempty"`
+}
+
+type V2JSONToken struct {
+	Type                     string   `json:"type"` // "luks2-keyring"
+	Keyslots                 []string `json:"keyslots,omitempty"`
+	*V2JSONTokenLUKS2Keyring          // type == "luks2-keyring"
+}
+
+type V2JSONTokenLUKS2Keyring struct {
+	KeyDescription string `json:"key_description"`
+}

vendor/golang.org/x/crypto/argon2/argon2.go

@@ -0,0 +1,283 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package argon2 implements the key derivation function Argon2.
+// Argon2 was selected as the winner of the Password Hashing Competition and can
+// be used to derive cryptographic keys from passwords.
+//
+// For a detailed specification of Argon2 see [1].
+//
+// If you aren't sure which function you need, use Argon2id (IDKey) and
+// the parameter recommendations for your scenario.
+//
+// # Argon2i
+//
+// Argon2i (implemented by Key) is the side-channel resistant version of Argon2.
+// It uses data-independent memory access, which is preferred for password
+// hashing and password-based key derivation. Argon2i requires more passes over
+// memory than Argon2id to protect from trade-off attacks. The recommended
+// parameters (taken from [2]) for non-interactive operations are time=3 and to
+// use the maximum available memory.
+//
+// # Argon2id
+//
+// Argon2id (implemented by IDKey) is a hybrid version of Argon2 combining
+// Argon2i and Argon2d. It uses data-independent memory access for the first
+// half of the first iteration over the memory and data-dependent memory access
+// for the rest. Argon2id is side-channel resistant and provides better brute-
+// force cost savings due to time-memory tradeoffs than Argon2i. The recommended
+// parameters for non-interactive operations (taken from [2]) are time=1 and to
+// use the maximum available memory.
+//
+// [1] https://github.com/P-H-C/phc-winner-argon2/blob/master/argon2-specs.pdf
+// [2] https://tools.ietf.org/html/draft-irtf-cfrg-argon2-03#section-9.3
+package argon2
+
+import (
+	"encoding/binary"
+	"sync"
+
+	"golang.org/x/crypto/blake2b"
+)
+
+// The Argon2 version implemented by this package.
+const Version = 0x13
+
+const (
+	argon2d = iota
+	argon2i
+	argon2id
+)
+
+// Key derives a key from the password, salt, and cost parameters using Argon2i
+// returning a byte slice of length keyLen that can be used as cryptographic
+// key. The CPU cost and parallelism degree must be greater than zero.
+//
+// For example, you can get a derived key for e.g. AES-256 (which needs a
+// 32-byte key) by doing:
+//
+//	key := argon2.Key([]byte("some password"), salt, 3, 32*1024, 4, 32)
+//
+// The draft RFC recommends[2] time=3, and memory=32*1024 is a sensible number.
+// If using that amount of memory (32 MB) is not possible in some contexts then
+// the time parameter can be increased to compensate.
+//
+// The time parameter specifies the number of passes over the memory and the
+// memory parameter specifies the size of the memory in KiB. For example
+// memory=32*1024 sets the memory cost to ~32 MB. The number of threads can be
+// adjusted to the number of available CPUs. The cost parameters should be
+// increased as memory latency and CPU parallelism increases. Remember to get a
+// good random salt.
+func Key(password, salt []byte, time, memory uint32, threads uint8, keyLen uint32) []byte {
+	return deriveKey(argon2i, password, salt, nil, nil, time, memory, threads, keyLen)
+}
+
+// IDKey derives a key from the password, salt, and cost parameters using
+// Argon2id returning a byte slice of length keyLen that can be used as
+// cryptographic key. The CPU cost and parallelism degree must be greater than
+// zero.
+//
+// For example, you can get a derived key for e.g. AES-256 (which needs a
+// 32-byte key) by doing:
+//
+//	key := argon2.IDKey([]byte("some password"), salt, 1, 64*1024, 4, 32)
+//
+// The draft RFC recommends[2] time=1, and memory=64*1024 is a sensible number.
+// If using that amount of memory (64 MB) is not possible in some contexts then
+// the time parameter can be increased to compensate.
+//
+// The time parameter specifies the number of passes over the memory and the
+// memory parameter specifies the size of the memory in KiB. For example
+// memory=64*1024 sets the memory cost to ~64 MB. The number of threads can be
+// adjusted to the numbers of available CPUs. The cost parameters should be
+// increased as memory latency and CPU parallelism increases. Remember to get a
+// good random salt.
+func IDKey(password, salt []byte, time, memory uint32, threads uint8, keyLen uint32) []byte {
+	return deriveKey(argon2id, password, salt, nil, nil, time, memory, threads, keyLen)
+}
+
+func deriveKey(mode int, password, salt, secret, data []byte, time, memory uint32, threads uint8, keyLen uint32) []byte {
+	if time < 1 {
+		panic("argon2: number of rounds too small")
+	}
+	if threads < 1 {
+		panic("argon2: parallelism degree too low")
+	}
+	h0 := initHash(password, salt, secret, data, time, memory, uint32(threads), keyLen, mode)
+
+	memory = memory / (syncPoints * uint32(threads)) * (syncPoints * uint32(threads))
+	if memory < 2*syncPoints*uint32(threads) {
+		memory = 2 * syncPoints * uint32(threads)
+	}
+	B := initBlocks(&h0, memory, uint32(threads))
+	processBlocks(B, time, memory, uint32(threads), mode)
+	return extractKey(B, memory, uint32(threads), keyLen)
+}
+
+const (
+	blockLength = 128
+	syncPoints  = 4
+)
+
+type block [blockLength]uint64
+
+func initHash(password, salt, key, data []byte, time, memory, threads, keyLen uint32, mode int) [blake2b.Size + 8]byte {
+	var (
+		h0     [blake2b.Size + 8]byte
+		params [24]byte
+		tmp    [4]byte
+	)
+
+	b2, _ := blake2b.New512(nil)
+	binary.LittleEndian.PutUint32(params[0:4], threads)
+	binary.LittleEndian.PutUint32(params[4:8], keyLen)
+	binary.LittleEndian.PutUint32(params[8:12], memory)
+	binary.LittleEndian.PutUint32(params[12:16], time)
+	binary.LittleEndian.PutUint32(params[16:20], uint32(Version))
+	binary.LittleEndian.PutUint32(params[20:24], uint32(mode))
+	b2.Write(params[:])
+	binary.LittleEndian.PutUint32(tmp[:], uint32(len(password)))
+	b2.Write(tmp[:])
+	b2.Write(password)
+	binary.LittleEndian.PutUint32(tmp[:], uint32(len(salt)))
+	b2.Write(tmp[:])
+	b2.Write(salt)
+	binary.LittleEndian.PutUint32(tmp[:], uint32(len(key)))
+	b2.Write(tmp[:])
+	b2.Write(key)
+	binary.LittleEndian.PutUint32(tmp[:], uint32(len(data)))
+	b2.Write(tmp[:])
+	b2.Write(data)
+	b2.Sum(h0[:0])
+	return h0
+}
+
+func initBlocks(h0 *[blake2b.Size + 8]byte, memory, threads uint32) []block {
+	var block0 [1024]byte
+	B := make([]block, memory)
+	for lane := uint32(0); lane < threads; lane++ {
+		j := lane * (memory / threads)
+		binary.LittleEndian.PutUint32(h0[blake2b.Size+4:], lane)
+
+		binary.LittleEndian.PutUint32(h0[blake2b.Size:], 0)
+		blake2bHash(block0[:], h0[:])
+		for i := range B[j+0] {
+			B[j+0][i] = binary.LittleEndian.Uint64(block0[i*8:])
+		}
+
+		binary.LittleEndian.PutUint32(h0[blake2b.Size:], 1)
+		blake2bHash(block0[:], h0[:])
+		for i := range B[j+1] {
+			B[j+1][i] = binary.LittleEndian.Uint64(block0[i*8:])
+		}
+	}
+	return B
+}
+
+func processBlocks(B []block, time, memory, threads uint32, mode int) {
+	lanes := memory / threads
+	segments := lanes / syncPoints
+
+	processSegment := func(n, slice, lane uint32, wg *sync.WaitGroup) {
+		var addresses, in, zero block
+		if mode == argon2i || (mode == argon2id && n == 0 && slice < syncPoints/2) {
+			in[0] = uint64(n)
+			in[1] = uint64(lane)
+			in[2] = uint64(slice)
+			in[3] = uint64(memory)
+			in[4] = uint64(time)
+			in[5] = uint64(mode)
+		}
+
+		index := uint32(0)
+		if n == 0 && slice == 0 {
+			index = 2 // we have already generated the first two blocks
+			if mode == argon2i || mode == argon2id {
+				in[6]++
+				processBlock(&addresses, &in, &zero)
+				processBlock(&addresses, &addresses, &zero)
+			}
+		}
+
+		offset := lane*lanes + slice*segments + index
+		var random uint64
+		for index < segments {
+			prev := offset - 1
+			if index == 0 && slice == 0 {
+				prev += lanes // last block in lane
+			}
+			if mode == argon2i || (mode == argon2id && n == 0 && slice < syncPoints/2) {
+				if index%blockLength == 0 {
+					in[6]++
+					processBlock(&addresses, &in, &zero)
+					processBlock(&addresses, &addresses, &zero)
+				}
+				random = addresses[index%blockLength]
+			} else {
+				random = B[prev][0]
+			}
+			newOffset := indexAlpha(random, lanes, segments, threads, n, slice, lane, index)
+			processBlockXOR(&B[offset], &B[prev], &B[newOffset])
+			index, offset = index+1, offset+1
+		}
+		wg.Done()
+	}
+
+	for n := uint32(0); n < time; n++ {
+		for slice := uint32(0); slice < syncPoints; slice++ {
+			var wg sync.WaitGroup
+			for lane := uint32(0); lane < threads; lane++ {
+				wg.Add(1)
+				go processSegment(n, slice, lane, &wg)
+			}
+			wg.Wait()
+		}
+	}
+
+}
+
+func extractKey(B []block, memory, threads, keyLen uint32) []byte {
+	lanes := memory / threads
+	for lane := uint32(0); lane < threads-1; lane++ {
+		for i, v := range B[(lane*lanes)+lanes-1] {
+			B[memory-1][i] ^= v
+		}
+	}
+
+	var block [1024]byte
+	for i, v := range B[memory-1] {
+		binary.LittleEndian.PutUint64(block[i*8:], v)
+	}
+	key := make([]byte, keyLen)
+	blake2bHash(key, block[:])
+	return key
+}
+
+func indexAlpha(rand uint64, lanes, segments, threads, n, slice, lane, index uint32) uint32 {
+	refLane := uint32(rand>>32) % threads
+	if n == 0 && slice == 0 {
+		refLane = lane
+	}
+	m, s := 3*segments, ((slice+1)%syncPoints)*segments
+	if lane == refLane {
+		m += index
+	}
+	if n == 0 {
+		m, s = slice*segments, 0
+		if slice == 0 || lane == refLane {
+			m += index
+		}
+	}
+	if index == 0 || lane == refLane {
+		m--
+	}
+	return phi(rand, uint64(m), uint64(s), refLane, lanes)
+}
+
+func phi(rand, m, s uint64, lane, lanes uint32) uint32 {
+	p := rand & 0xFFFFFFFF
+	p = (p * p) >> 32
+	p = (p * m) >> 32
+	return lane*lanes + uint32((s+m-(p+1))%uint64(lanes))
+}

vendor/golang.org/x/crypto/argon2/blake2b.go

@@ -0,0 +1,53 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package argon2
+
+import (
+	"encoding/binary"
+	"hash"
+
+	"golang.org/x/crypto/blake2b"
+)
+
+// blake2bHash computes an arbitrary long hash value of in
+// and writes the hash to out.
+func blake2bHash(out []byte, in []byte) {
+	var b2 hash.Hash
+	if n := len(out); n < blake2b.Size {
+		b2, _ = blake2b.New(n, nil)
+	} else {
+		b2, _ = blake2b.New512(nil)
+	}
+
+	var buffer [blake2b.Size]byte
+	binary.LittleEndian.PutUint32(buffer[:4], uint32(len(out)))
+	b2.Write(buffer[:4])
+	b2.Write(in)
+
+	if len(out) <= blake2b.Size {
+		b2.Sum(out[:0])
+		return
+	}
+
+	outLen := len(out)
+	b2.Sum(buffer[:0])
+	b2.Reset()
+	copy(out, buffer[:32])
+	out = out[32:]
+	for len(out) > blake2b.Size {
+		b2.Write(buffer[:])
+		b2.Sum(buffer[:0])
+		copy(out, buffer[:32])
+		out = out[32:]
+		b2.Reset()
+	}
+
+	if outLen%blake2b.Size > 0 { // outLen > 64
+		r := ((outLen + 31) / 32) - 2 // ⌈τ /32⌉-2
+		b2, _ = blake2b.New(outLen-32*r, nil)
+	}
+	b2.Write(buffer[:])
+	b2.Sum(out[:0])
+}

vendor/golang.org/x/crypto/argon2/blamka_amd64.go

@@ -0,0 +1,61 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build amd64 && gc && !purego
+// +build amd64,gc,!purego
+
+package argon2
+
+import "golang.org/x/sys/cpu"
+
+func init() {
+	useSSE4 = cpu.X86.HasSSE41
+}
+
+//go:noescape
+func mixBlocksSSE2(out, a, b, c *block)
+
+//go:noescape
+func xorBlocksSSE2(out, a, b, c *block)
+
+//go:noescape
+func blamkaSSE4(b *block)
+
+func processBlockSSE(out, in1, in2 *block, xor bool) {
+	var t block
+	mixBlocksSSE2(&t, in1, in2, &t)
+	if useSSE4 {
+		blamkaSSE4(&t)
+	} else {
+		for i := 0; i < blockLength; i += 16 {
+			blamkaGeneric(
+				&t[i+0], &t[i+1], &t[i+2], &t[i+3],
+				&t[i+4], &t[i+5], &t[i+6], &t[i+7],
+				&t[i+8], &t[i+9], &t[i+10], &t[i+11],
+				&t[i+12], &t[i+13], &t[i+14], &t[i+15],
+			)
+		}
+		for i := 0; i < blockLength/8; i += 2 {
+			blamkaGeneric(
+				&t[i], &t[i+1], &t[16+i], &t[16+i+1],
+				&t[32+i], &t[32+i+1], &t[48+i], &t[48+i+1],
+				&t[64+i], &t[64+i+1], &t[80+i], &t[80+i+1],
+				&t[96+i], &t[96+i+1], &t[112+i], &t[112+i+1],
+			)
+		}
+	}
+	if xor {
+		xorBlocksSSE2(out, in1, in2, &t)
+	} else {
+		mixBlocksSSE2(out, in1, in2, &t)
+	}
+}
+
+func processBlock(out, in1, in2 *block) {
+	processBlockSSE(out, in1, in2, false)
+}
+
+func processBlockXOR(out, in1, in2 *block) {
+	processBlockSSE(out, in1, in2, true)
+}

vendor/golang.org/x/crypto/argon2/blamka_amd64.s

@@ -0,0 +1,244 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build amd64 && gc && !purego
+// +build amd64,gc,!purego
+
+#include "textflag.h"
+
+DATA ·c40<>+0x00(SB)/8, $0x0201000706050403
+DATA ·c40<>+0x08(SB)/8, $0x0a09080f0e0d0c0b
+GLOBL ·c40<>(SB), (NOPTR+RODATA), $16
+
+DATA ·c48<>+0x00(SB)/8, $0x0100070605040302
+DATA ·c48<>+0x08(SB)/8, $0x09080f0e0d0c0b0a
+GLOBL ·c48<>(SB), (NOPTR+RODATA), $16
+
+#define SHUFFLE(v2, v3, v4, v5, v6, v7, t1, t2) \
+	MOVO       v4, t1; \
+	MOVO       v5, v4; \
+	MOVO       t1, v5; \
+	MOVO       v6, t1; \
+	PUNPCKLQDQ v6, t2; \
+	PUNPCKHQDQ v7, v6; \
+	PUNPCKHQDQ t2, v6; \
+	PUNPCKLQDQ v7, t2; \
+	MOVO       t1, v7; \
+	MOVO       v2, t1; \
+	PUNPCKHQDQ t2, v7; \
+	PUNPCKLQDQ v3, t2; \
+	PUNPCKHQDQ t2, v2; \
+	PUNPCKLQDQ t1, t2; \
+	PUNPCKHQDQ t2, v3
+
+#define SHUFFLE_INV(v2, v3, v4, v5, v6, v7, t1, t2) \
+	MOVO       v4, t1; \
+	MOVO       v5, v4; \
+	MOVO       t1, v5; \
+	MOVO       v2, t1; \
+	PUNPCKLQDQ v2, t2; \
+	PUNPCKHQDQ v3, v2; \
+	PUNPCKHQDQ t2, v2; \
+	PUNPCKLQDQ v3, t2; \
+	MOVO       t1, v3; \
+	MOVO       v6, t1; \
+	PUNPCKHQDQ t2, v3; \
+	PUNPCKLQDQ v7, t2; \
+	PUNPCKHQDQ t2, v6; \
+	PUNPCKLQDQ t1, t2; \
+	PUNPCKHQDQ t2, v7
+
+#define HALF_ROUND(v0, v1, v2, v3, v4, v5, v6, v7, t0, c40, c48) \
+	MOVO    v0, t0;        \
+	PMULULQ v2, t0;        \
+	PADDQ   v2, v0;        \
+	PADDQ   t0, v0;        \
+	PADDQ   t0, v0;        \
+	PXOR    v0, v6;        \
+	PSHUFD  $0xB1, v6, v6; \
+	MOVO    v4, t0;        \
+	PMULULQ v6, t0;        \
+	PADDQ   v6, v4;        \
+	PADDQ   t0, v4;        \
+	PADDQ   t0, v4;        \
+	PXOR    v4, v2;        \
+	PSHUFB  c40, v2;       \
+	MOVO    v0, t0;        \
+	PMULULQ v2, t0;        \
+	PADDQ   v2, v0;        \
+	PADDQ   t0, v0;        \
+	PADDQ   t0, v0;        \
+	PXOR    v0, v6;        \
+	PSHUFB  c48, v6;       \
+	MOVO    v4, t0;        \
+	PMULULQ v6, t0;        \
+	PADDQ   v6, v4;        \
+	PADDQ   t0, v4;        \
+	PADDQ   t0, v4;        \
+	PXOR    v4, v2;        \
+	MOVO    v2, t0;        \
+	PADDQ   v2, t0;        \
+	PSRLQ   $63, v2;       \
+	PXOR    t0, v2;        \
+	MOVO    v1, t0;        \
+	PMULULQ v3, t0;        \
+	PADDQ   v3, v1;        \
+	PADDQ   t0, v1;        \
+	PADDQ   t0, v1;        \
+	PXOR    v1, v7;        \
+	PSHUFD  $0xB1, v7, v7; \
+	MOVO    v5, t0;        \
+	PMULULQ v7, t0;        \
+	PADDQ   v7, v5;        \
+	PADDQ   t0, v5;        \
+	PADDQ   t0, v5;        \
+	PXOR    v5, v3;        \
+	PSHUFB  c40, v3;       \
+	MOVO    v1, t0;        \
+	PMULULQ v3, t0;        \
+	PADDQ   v3, v1;        \
+	PADDQ   t0, v1;        \
+	PADDQ   t0, v1;        \
+	PXOR    v1, v7;        \
+	PSHUFB  c48, v7;       \
+	MOVO    v5, t0;        \
+	PMULULQ v7, t0;        \
+	PADDQ   v7, v5;        \
+	PADDQ   t0, v5;        \
+	PADDQ   t0, v5;        \
+	PXOR    v5, v3;        \
+	MOVO    v3, t0;        \
+	PADDQ   v3, t0;        \
+	PSRLQ   $63, v3;       \
+	PXOR    t0, v3
+
+#define LOAD_MSG_0(block, off) \
+	MOVOU 8*(off+0)(block), X0;  \
+	MOVOU 8*(off+2)(block), X1;  \
+	MOVOU 8*(off+4)(block), X2;  \
+	MOVOU 8*(off+6)(block), X3;  \
+	MOVOU 8*(off+8)(block), X4;  \
+	MOVOU 8*(off+10)(block), X5; \
+	MOVOU 8*(off+12)(block), X6; \
+	MOVOU 8*(off+14)(block), X7
+
+#define STORE_MSG_0(block, off) \
+	MOVOU X0, 8*(off+0)(block);  \
+	MOVOU X1, 8*(off+2)(block);  \
+	MOVOU X2, 8*(off+4)(block);  \
+	MOVOU X3, 8*(off+6)(block);  \
+	MOVOU X4, 8*(off+8)(block);  \
+	MOVOU X5, 8*(off+10)(block); \
+	MOVOU X6, 8*(off+12)(block); \
+	MOVOU X7, 8*(off+14)(block)
+
+#define LOAD_MSG_1(block, off) \
+	MOVOU 8*off+0*8(block), X0;  \
+	MOVOU 8*off+16*8(block), X1; \
+	MOVOU 8*off+32*8(block), X2; \
+	MOVOU 8*off+48*8(block), X3; \
+	MOVOU 8*off+64*8(block), X4; \
+	MOVOU 8*off+80*8(block), X5; \
+	MOVOU 8*off+96*8(block), X6; \
+	MOVOU 8*off+112*8(block), X7
+
+#define STORE_MSG_1(block, off) \
+	MOVOU X0, 8*off+0*8(block);  \
+	MOVOU X1, 8*off+16*8(block); \
+	MOVOU X2, 8*off+32*8(block); \
+	MOVOU X3, 8*off+48*8(block); \
+	MOVOU X4, 8*off+64*8(block); \
+	MOVOU X5, 8*off+80*8(block); \
+	MOVOU X6, 8*off+96*8(block); \
+	MOVOU X7, 8*off+112*8(block)
+
+#define BLAMKA_ROUND_0(block, off, t0, t1, c40, c48) \
+	LOAD_MSG_0(block, off);                                   \
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, t0, c40, c48); \
+	SHUFFLE(X2, X3, X4, X5, X6, X7, t0, t1);                  \
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, t0, c40, c48); \
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, t0, t1);              \
+	STORE_MSG_0(block, off)
+
+#define BLAMKA_ROUND_1(block, off, t0, t1, c40, c48) \
+	LOAD_MSG_1(block, off);                                   \
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, t0, c40, c48); \
+	SHUFFLE(X2, X3, X4, X5, X6, X7, t0, t1);                  \
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, t0, c40, c48); \
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, t0, t1);              \
+	STORE_MSG_1(block, off)
+
+// func blamkaSSE4(b *block)
+TEXT ·blamkaSSE4(SB), 4, $0-8
+	MOVQ b+0(FP), AX
+
+	MOVOU ·c40<>(SB), X10
+	MOVOU ·c48<>(SB), X11
+
+	BLAMKA_ROUND_0(AX, 0, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 16, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 32, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 48, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 64, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 80, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 96, X8, X9, X10, X11)
+	BLAMKA_ROUND_0(AX, 112, X8, X9, X10, X11)
+
+	BLAMKA_ROUND_1(AX, 0, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 2, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 4, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 6, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 8, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 10, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 12, X8, X9, X10, X11)
+	BLAMKA_ROUND_1(AX, 14, X8, X9, X10, X11)
+	RET
+
+// func mixBlocksSSE2(out, a, b, c *block)
+TEXT ·mixBlocksSSE2(SB), 4, $0-32
+	MOVQ out+0(FP), DX
+	MOVQ a+8(FP), AX
+	MOVQ b+16(FP), BX
+	MOVQ a+24(FP), CX
+	MOVQ $128, BP
+
+loop:
+	MOVOU 0(AX), X0
+	MOVOU 0(BX), X1
+	MOVOU 0(CX), X2
+	PXOR  X1, X0
+	PXOR  X2, X0
+	MOVOU X0, 0(DX)
+	ADDQ  $16, AX
+	ADDQ  $16, BX
+	ADDQ  $16, CX
+	ADDQ  $16, DX
+	SUBQ  $2, BP
+	JA    loop
+	RET
+
+// func xorBlocksSSE2(out, a, b, c *block)
+TEXT ·xorBlocksSSE2(SB), 4, $0-32
+	MOVQ out+0(FP), DX
+	MOVQ a+8(FP), AX
+	MOVQ b+16(FP), BX
+	MOVQ a+24(FP), CX
+	MOVQ $128, BP
+
+loop:
+	MOVOU 0(AX), X0
+	MOVOU 0(BX), X1
+	MOVOU 0(CX), X2
+	MOVOU 0(DX), X3
+	PXOR  X1, X0
+	PXOR  X2, X0
+	PXOR  X3, X0
+	MOVOU X0, 0(DX)
+	ADDQ  $16, AX
+	ADDQ  $16, BX
+	ADDQ  $16, CX
+	ADDQ  $16, DX
+	SUBQ  $2, BP
+	JA    loop
+	RET

vendor/golang.org/x/crypto/argon2/blamka_generic.go

@@ -0,0 +1,163 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package argon2
+
+var useSSE4 bool
+
+func processBlockGeneric(out, in1, in2 *block, xor bool) {
+	var t block
+	for i := range t {
+		t[i] = in1[i] ^ in2[i]
+	}
+	for i := 0; i < blockLength; i += 16 {
+		blamkaGeneric(
+			&t[i+0], &t[i+1], &t[i+2], &t[i+3],
+			&t[i+4], &t[i+5], &t[i+6], &t[i+7],
+			&t[i+8], &t[i+9], &t[i+10], &t[i+11],
+			&t[i+12], &t[i+13], &t[i+14], &t[i+15],
+		)
+	}
+	for i := 0; i < blockLength/8; i += 2 {
+		blamkaGeneric(
+			&t[i], &t[i+1], &t[16+i], &t[16+i+1],
+			&t[32+i], &t[32+i+1], &t[48+i], &t[48+i+1],
+			&t[64+i], &t[64+i+1], &t[80+i], &t[80+i+1],
+			&t[96+i], &t[96+i+1], &t[112+i], &t[112+i+1],
+		)
+	}
+	if xor {
+		for i := range t {
+			out[i] ^= in1[i] ^ in2[i] ^ t[i]
+		}
+	} else {
+		for i := range t {
+			out[i] = in1[i] ^ in2[i] ^ t[i]
+		}
+	}
+}
+
+func blamkaGeneric(t00, t01, t02, t03, t04, t05, t06, t07, t08, t09, t10, t11, t12, t13, t14, t15 *uint64) {
+	v00, v01, v02, v03 := *t00, *t01, *t02, *t03
+	v04, v05, v06, v07 := *t04, *t05, *t06, *t07
+	v08, v09, v10, v11 := *t08, *t09, *t10, *t11
+	v12, v13, v14, v15 := *t12, *t13, *t14, *t15
+
+	v00 += v04 + 2*uint64(uint32(v00))*uint64(uint32(v04))
+	v12 ^= v00
+	v12 = v12>>32 | v12<<32
+	v08 += v12 + 2*uint64(uint32(v08))*uint64(uint32(v12))
+	v04 ^= v08
+	v04 = v04>>24 | v04<<40
+
+	v00 += v04 + 2*uint64(uint32(v00))*uint64(uint32(v04))
+	v12 ^= v00
+	v12 = v12>>16 | v12<<48
+	v08 += v12 + 2*uint64(uint32(v08))*uint64(uint32(v12))
+	v04 ^= v08
+	v04 = v04>>63 | v04<<1
+
+	v01 += v05 + 2*uint64(uint32(v01))*uint64(uint32(v05))
+	v13 ^= v01
+	v13 = v13>>32 | v13<<32
+	v09 += v13 + 2*uint64(uint32(v09))*uint64(uint32(v13))
+	v05 ^= v09
+	v05 = v05>>24 | v05<<40
+
+	v01 += v05 + 2*uint64(uint32(v01))*uint64(uint32(v05))
+	v13 ^= v01
+	v13 = v13>>16 | v13<<48
+	v09 += v13 + 2*uint64(uint32(v09))*uint64(uint32(v13))
+	v05 ^= v09
+	v05 = v05>>63 | v05<<1
+
+	v02 += v06 + 2*uint64(uint32(v02))*uint64(uint32(v06))
+	v14 ^= v02
+	v14 = v14>>32 | v14<<32
+	v10 += v14 + 2*uint64(uint32(v10))*uint64(uint32(v14))
+	v06 ^= v10
+	v06 = v06>>24 | v06<<40
+
+	v02 += v06 + 2*uint64(uint32(v02))*uint64(uint32(v06))
+	v14 ^= v02
+	v14 = v14>>16 | v14<<48
+	v10 += v14 + 2*uint64(uint32(v10))*uint64(uint32(v14))
+	v06 ^= v10
+	v06 = v06>>63 | v06<<1
+
+	v03 += v07 + 2*uint64(uint32(v03))*uint64(uint32(v07))
+	v15 ^= v03
+	v15 = v15>>32 | v15<<32
+	v11 += v15 + 2*uint64(uint32(v11))*uint64(uint32(v15))
+	v07 ^= v11
+	v07 = v07>>24 | v07<<40
+
+	v03 += v07 + 2*uint64(uint32(v03))*uint64(uint32(v07))
+	v15 ^= v03
+	v15 = v15>>16 | v15<<48
+	v11 += v15 + 2*uint64(uint32(v11))*uint64(uint32(v15))
+	v07 ^= v11
+	v07 = v07>>63 | v07<<1
+
+	v00 += v05 + 2*uint64(uint32(v00))*uint64(uint32(v05))
+	v15 ^= v00
+	v15 = v15>>32 | v15<<32
+	v10 += v15 + 2*uint64(uint32(v10))*uint64(uint32(v15))
+	v05 ^= v10
+	v05 = v05>>24 | v05<<40
+
+	v00 += v05 + 2*uint64(uint32(v00))*uint64(uint32(v05))
+	v15 ^= v00
+	v15 = v15>>16 | v15<<48
+	v10 += v15 + 2*uint64(uint32(v10))*uint64(uint32(v15))
+	v05 ^= v10
+	v05 = v05>>63 | v05<<1
+
+	v01 += v06 + 2*uint64(uint32(v01))*uint64(uint32(v06))
+	v12 ^= v01
+	v12 = v12>>32 | v12<<32
+	v11 += v12 + 2*uint64(uint32(v11))*uint64(uint32(v12))
+	v06 ^= v11
+	v06 = v06>>24 | v06<<40
+
+	v01 += v06 + 2*uint64(uint32(v01))*uint64(uint32(v06))
+	v12 ^= v01
+	v12 = v12>>16 | v12<<48
+	v11 += v12 + 2*uint64(uint32(v11))*uint64(uint32(v12))
+	v06 ^= v11
+	v06 = v06>>63 | v06<<1
+
+	v02 += v07 + 2*uint64(uint32(v02))*uint64(uint32(v07))
+	v13 ^= v02
+	v13 = v13>>32 | v13<<32
+	v08 += v13 + 2*uint64(uint32(v08))*uint64(uint32(v13))
+	v07 ^= v08
+	v07 = v07>>24 | v07<<40
+
+	v02 += v07 + 2*uint64(uint32(v02))*uint64(uint32(v07))
+	v13 ^= v02
+	v13 = v13>>16 | v13<<48
+	v08 += v13 + 2*uint64(uint32(v08))*uint64(uint32(v13))
+	v07 ^= v08
+	v07 = v07>>63 | v07<<1
+
+	v03 += v04 + 2*uint64(uint32(v03))*uint64(uint32(v04))
+	v14 ^= v03
+	v14 = v14>>32 | v14<<32
+	v09 += v14 + 2*uint64(uint32(v09))*uint64(uint32(v14))
+	v04 ^= v09
+	v04 = v04>>24 | v04<<40
+
+	v03 += v04 + 2*uint64(uint32(v03))*uint64(uint32(v04))
+	v14 ^= v03
+	v14 = v14>>16 | v14<<48
+	v09 += v14 + 2*uint64(uint32(v09))*uint64(uint32(v14))
+	v04 ^= v09
+	v04 = v04>>63 | v04<<1
+
+	*t00, *t01, *t02, *t03 = v00, v01, v02, v03
+	*t04, *t05, *t06, *t07 = v04, v05, v06, v07
+	*t08, *t09, *t10, *t11 = v08, v09, v10, v11
+	*t12, *t13, *t14, *t15 = v12, v13, v14, v15
+}

vendor/golang.org/x/crypto/argon2/blamka_ref.go

@@ -0,0 +1,16 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !amd64 || purego || !gc
+// +build !amd64 purego !gc
+
+package argon2
+
+func processBlock(out, in1, in2 *block) {
+	processBlockGeneric(out, in1, in2, false)
+}
+
+func processBlockXOR(out, in1, in2 *block) {
+	processBlockGeneric(out, in1, in2, true)
+}

vendor/golang.org/x/crypto/blake2b/blake2b.go

@@ -0,0 +1,291 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693
+// and the extendable output function (XOF) BLAKE2Xb.
+//
+// BLAKE2b is optimized for 64-bit platforms—including NEON-enabled ARMs—and
+// produces digests of any size between 1 and 64 bytes.
+// For a detailed specification of BLAKE2b see https://blake2.net/blake2.pdf
+// and for BLAKE2Xb see https://blake2.net/blake2x.pdf
+//
+// If you aren't sure which function you need, use BLAKE2b (Sum512 or New512).
+// If you need a secret-key MAC (message authentication code), use the New512
+// function with a non-nil key.
+//
+// BLAKE2X is a construction to compute hash values larger than 64 bytes. It
+// can produce hash values between 0 and 4 GiB.
+package blake2b
+
+import (
+	"encoding/binary"
+	"errors"
+	"hash"
+)
+
+const (
+	// The blocksize of BLAKE2b in bytes.
+	BlockSize = 128
+	// The hash size of BLAKE2b-512 in bytes.
+	Size = 64
+	// The hash size of BLAKE2b-384 in bytes.
+	Size384 = 48
+	// The hash size of BLAKE2b-256 in bytes.
+	Size256 = 32
+)
+
+var (
+	useAVX2 bool
+	useAVX  bool
+	useSSE4 bool
+)
+
+var (
+	errKeySize  = errors.New("blake2b: invalid key size")
+	errHashSize = errors.New("blake2b: invalid hash size")
+)
+
+var iv = [8]uint64{
+	0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
+	0x510e527fade682d1, 0x9b05688c2b3e6c1f, 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179,
+}
+
+// Sum512 returns the BLAKE2b-512 checksum of the data.
+func Sum512(data []byte) [Size]byte {
+	var sum [Size]byte
+	checkSum(&sum, Size, data)
+	return sum
+}
+
+// Sum384 returns the BLAKE2b-384 checksum of the data.
+func Sum384(data []byte) [Size384]byte {
+	var sum [Size]byte
+	var sum384 [Size384]byte
+	checkSum(&sum, Size384, data)
+	copy(sum384[:], sum[:Size384])
+	return sum384
+}
+
+// Sum256 returns the BLAKE2b-256 checksum of the data.
+func Sum256(data []byte) [Size256]byte {
+	var sum [Size]byte
+	var sum256 [Size256]byte
+	checkSum(&sum, Size256, data)
+	copy(sum256[:], sum[:Size256])
+	return sum256
+}
+
+// New512 returns a new hash.Hash computing the BLAKE2b-512 checksum. A non-nil
+// key turns the hash into a MAC. The key must be between zero and 64 bytes long.
+func New512(key []byte) (hash.Hash, error) { return newDigest(Size, key) }
+
+// New384 returns a new hash.Hash computing the BLAKE2b-384 checksum. A non-nil
+// key turns the hash into a MAC. The key must be between zero and 64 bytes long.
+func New384(key []byte) (hash.Hash, error) { return newDigest(Size384, key) }
+
+// New256 returns a new hash.Hash computing the BLAKE2b-256 checksum. A non-nil
+// key turns the hash into a MAC. The key must be between zero and 64 bytes long.
+func New256(key []byte) (hash.Hash, error) { return newDigest(Size256, key) }
+
+// New returns a new hash.Hash computing the BLAKE2b checksum with a custom length.
+// A non-nil key turns the hash into a MAC. The key must be between zero and 64 bytes long.
+// The hash size can be a value between 1 and 64 but it is highly recommended to use
+// values equal or greater than:
+// - 32 if BLAKE2b is used as a hash function (The key is zero bytes long).
+// - 16 if BLAKE2b is used as a MAC function (The key is at least 16 bytes long).
+// When the key is nil, the returned hash.Hash implements BinaryMarshaler
+// and BinaryUnmarshaler for state (de)serialization as documented by hash.Hash.
+func New(size int, key []byte) (hash.Hash, error) { return newDigest(size, key) }
+
+func newDigest(hashSize int, key []byte) (*digest, error) {
+	if hashSize < 1 || hashSize > Size {
+		return nil, errHashSize
+	}
+	if len(key) > Size {
+		return nil, errKeySize
+	}
+	d := &digest{
+		size:   hashSize,
+		keyLen: len(key),
+	}
+	copy(d.key[:], key)
+	d.Reset()
+	return d, nil
+}
+
+func checkSum(sum *[Size]byte, hashSize int, data []byte) {
+	h := iv
+	h[0] ^= uint64(hashSize) | (1 << 16) | (1 << 24)
+	var c [2]uint64
+
+	if length := len(data); length > BlockSize {
+		n := length &^ (BlockSize - 1)
+		if length == n {
+			n -= BlockSize
+		}
+		hashBlocks(&h, &c, 0, data[:n])
+		data = data[n:]
+	}
+
+	var block [BlockSize]byte
+	offset := copy(block[:], data)
+	remaining := uint64(BlockSize - offset)
+	if c[0] < remaining {
+		c[1]--
+	}
+	c[0] -= remaining
+
+	hashBlocks(&h, &c, 0xFFFFFFFFFFFFFFFF, block[:])
+
+	for i, v := range h[:(hashSize+7)/8] {
+		binary.LittleEndian.PutUint64(sum[8*i:], v)
+	}
+}
+
+type digest struct {
+	h      [8]uint64
+	c      [2]uint64
+	size   int
+	block  [BlockSize]byte
+	offset int
+
+	key    [BlockSize]byte
+	keyLen int
+}
+
+const (
+	magic         = "b2b"
+	marshaledSize = len(magic) + 8*8 + 2*8 + 1 + BlockSize + 1
+)
+
+func (d *digest) MarshalBinary() ([]byte, error) {
+	if d.keyLen != 0 {
+		return nil, errors.New("crypto/blake2b: cannot marshal MACs")
+	}
+	b := make([]byte, 0, marshaledSize)
+	b = append(b, magic...)
+	for i := 0; i < 8; i++ {
+		b = appendUint64(b, d.h[i])
+	}
+	b = appendUint64(b, d.c[0])
+	b = appendUint64(b, d.c[1])
+	// Maximum value for size is 64
+	b = append(b, byte(d.size))
+	b = append(b, d.block[:]...)
+	b = append(b, byte(d.offset))
+	return b, nil
+}
+
+func (d *digest) UnmarshalBinary(b []byte) error {
+	if len(b) < len(magic) || string(b[:len(magic)]) != magic {
+		return errors.New("crypto/blake2b: invalid hash state identifier")
+	}
+	if len(b) != marshaledSize {
+		return errors.New("crypto/blake2b: invalid hash state size")
+	}
+	b = b[len(magic):]
+	for i := 0; i < 8; i++ {
+		b, d.h[i] = consumeUint64(b)
+	}
+	b, d.c[0] = consumeUint64(b)
+	b, d.c[1] = consumeUint64(b)
+	d.size = int(b[0])
+	b = b[1:]
+	copy(d.block[:], b[:BlockSize])
+	b = b[BlockSize:]
+	d.offset = int(b[0])
+	return nil
+}
+
+func (d *digest) BlockSize() int { return BlockSize }
+
+func (d *digest) Size() int { return d.size }
+
+func (d *digest) Reset() {
+	d.h = iv
+	d.h[0] ^= uint64(d.size) | (uint64(d.keyLen) << 8) | (1 << 16) | (1 << 24)
+	d.offset, d.c[0], d.c[1] = 0, 0, 0
+	if d.keyLen > 0 {
+		d.block = d.key
+		d.offset = BlockSize
+	}
+}
+
+func (d *digest) Write(p []byte) (n int, err error) {
+	n = len(p)
+
+	if d.offset > 0 {
+		remaining := BlockSize - d.offset
+		if n <= remaining {
+			d.offset += copy(d.block[d.offset:], p)
+			return
+		}
+		copy(d.block[d.offset:], p[:remaining])
+		hashBlocks(&d.h, &d.c, 0, d.block[:])
+		d.offset = 0
+		p = p[remaining:]
+	}
+
+	if length := len(p); length > BlockSize {
+		nn := length &^ (BlockSize - 1)
+		if length == nn {
+			nn -= BlockSize
+		}
+		hashBlocks(&d.h, &d.c, 0, p[:nn])
+		p = p[nn:]
+	}
+
+	if len(p) > 0 {
+		d.offset += copy(d.block[:], p)
+	}
+
+	return
+}
+
+func (d *digest) Sum(sum []byte) []byte {
+	var hash [Size]byte
+	d.finalize(&hash)
+	return append(sum, hash[:d.size]...)
+}
+
+func (d *digest) finalize(hash *[Size]byte) {
+	var block [BlockSize]byte
+	copy(block[:], d.block[:d.offset])
+	remaining := uint64(BlockSize - d.offset)
+
+	c := d.c
+	if c[0] < remaining {
+		c[1]--
+	}
+	c[0] -= remaining
+
+	h := d.h
+	hashBlocks(&h, &c, 0xFFFFFFFFFFFFFFFF, block[:])
+
+	for i, v := range h {
+		binary.LittleEndian.PutUint64(hash[8*i:], v)
+	}
+}
+
+func appendUint64(b []byte, x uint64) []byte {
+	var a [8]byte
+	binary.BigEndian.PutUint64(a[:], x)
+	return append(b, a[:]...)
+}
+
+func appendUint32(b []byte, x uint32) []byte {
+	var a [4]byte
+	binary.BigEndian.PutUint32(a[:], x)
+	return append(b, a[:]...)
+}
+
+func consumeUint64(b []byte) ([]byte, uint64) {
+	x := binary.BigEndian.Uint64(b)
+	return b[8:], x
+}
+
+func consumeUint32(b []byte) ([]byte, uint32) {
+	x := binary.BigEndian.Uint32(b)
+	return b[4:], x
+}

vendor/golang.org/x/crypto/blake2b/blake2bAVX2_amd64.go

@@ -0,0 +1,38 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.7 && amd64 && gc && !purego
+// +build go1.7,amd64,gc,!purego
+
+package blake2b
+
+import "golang.org/x/sys/cpu"
+
+func init() {
+	useAVX2 = cpu.X86.HasAVX2
+	useAVX = cpu.X86.HasAVX
+	useSSE4 = cpu.X86.HasSSE41
+}
+
+//go:noescape
+func hashBlocksAVX2(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+
+//go:noescape
+func hashBlocksAVX(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+
+//go:noescape
+func hashBlocksSSE4(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+
+func hashBlocks(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte) {
+	switch {
+	case useAVX2:
+		hashBlocksAVX2(h, c, flag, blocks)
+	case useAVX:
+		hashBlocksAVX(h, c, flag, blocks)
+	case useSSE4:
+		hashBlocksSSE4(h, c, flag, blocks)
+	default:
+		hashBlocksGeneric(h, c, flag, blocks)
+	}
+}

vendor/golang.org/x/crypto/blake2b/blake2bAVX2_amd64.s

@@ -0,0 +1,745 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.7 && amd64 && gc && !purego
+// +build go1.7,amd64,gc,!purego
+
+#include "textflag.h"
+
+DATA ·AVX2_iv0<>+0x00(SB)/8, $0x6a09e667f3bcc908
+DATA ·AVX2_iv0<>+0x08(SB)/8, $0xbb67ae8584caa73b
+DATA ·AVX2_iv0<>+0x10(SB)/8, $0x3c6ef372fe94f82b
+DATA ·AVX2_iv0<>+0x18(SB)/8, $0xa54ff53a5f1d36f1
+GLOBL ·AVX2_iv0<>(SB), (NOPTR+RODATA), $32
+
+DATA ·AVX2_iv1<>+0x00(SB)/8, $0x510e527fade682d1
+DATA ·AVX2_iv1<>+0x08(SB)/8, $0x9b05688c2b3e6c1f
+DATA ·AVX2_iv1<>+0x10(SB)/8, $0x1f83d9abfb41bd6b
+DATA ·AVX2_iv1<>+0x18(SB)/8, $0x5be0cd19137e2179
+GLOBL ·AVX2_iv1<>(SB), (NOPTR+RODATA), $32
+
+DATA ·AVX2_c40<>+0x00(SB)/8, $0x0201000706050403
+DATA ·AVX2_c40<>+0x08(SB)/8, $0x0a09080f0e0d0c0b
+DATA ·AVX2_c40<>+0x10(SB)/8, $0x0201000706050403
+DATA ·AVX2_c40<>+0x18(SB)/8, $0x0a09080f0e0d0c0b
+GLOBL ·AVX2_c40<>(SB), (NOPTR+RODATA), $32
+
+DATA ·AVX2_c48<>+0x00(SB)/8, $0x0100070605040302
+DATA ·AVX2_c48<>+0x08(SB)/8, $0x09080f0e0d0c0b0a
+DATA ·AVX2_c48<>+0x10(SB)/8, $0x0100070605040302
+DATA ·AVX2_c48<>+0x18(SB)/8, $0x09080f0e0d0c0b0a
+GLOBL ·AVX2_c48<>(SB), (NOPTR+RODATA), $32
+
+DATA ·AVX_iv0<>+0x00(SB)/8, $0x6a09e667f3bcc908
+DATA ·AVX_iv0<>+0x08(SB)/8, $0xbb67ae8584caa73b
+GLOBL ·AVX_iv0<>(SB), (NOPTR+RODATA), $16
+
+DATA ·AVX_iv1<>+0x00(SB)/8, $0x3c6ef372fe94f82b
+DATA ·AVX_iv1<>+0x08(SB)/8, $0xa54ff53a5f1d36f1
+GLOBL ·AVX_iv1<>(SB), (NOPTR+RODATA), $16
+
+DATA ·AVX_iv2<>+0x00(SB)/8, $0x510e527fade682d1
+DATA ·AVX_iv2<>+0x08(SB)/8, $0x9b05688c2b3e6c1f
+GLOBL ·AVX_iv2<>(SB), (NOPTR+RODATA), $16
+
+DATA ·AVX_iv3<>+0x00(SB)/8, $0x1f83d9abfb41bd6b
+DATA ·AVX_iv3<>+0x08(SB)/8, $0x5be0cd19137e2179
+GLOBL ·AVX_iv3<>(SB), (NOPTR+RODATA), $16
+
+DATA ·AVX_c40<>+0x00(SB)/8, $0x0201000706050403
+DATA ·AVX_c40<>+0x08(SB)/8, $0x0a09080f0e0d0c0b
+GLOBL ·AVX_c40<>(SB), (NOPTR+RODATA), $16
+
+DATA ·AVX_c48<>+0x00(SB)/8, $0x0100070605040302
+DATA ·AVX_c48<>+0x08(SB)/8, $0x09080f0e0d0c0b0a
+GLOBL ·AVX_c48<>(SB), (NOPTR+RODATA), $16
+
+#define VPERMQ_0x39_Y1_Y1 BYTE $0xc4; BYTE $0xe3; BYTE $0xfd; BYTE $0x00; BYTE $0xc9; BYTE $0x39
+#define VPERMQ_0x93_Y1_Y1 BYTE $0xc4; BYTE $0xe3; BYTE $0xfd; BYTE $0x00; BYTE $0xc9; BYTE $0x93
+#define VPERMQ_0x4E_Y2_Y2 BYTE $0xc4; BYTE $0xe3; BYTE $0xfd; BYTE $0x00; BYTE $0xd2; BYTE $0x4e
+#define VPERMQ_0x93_Y3_Y3 BYTE $0xc4; BYTE $0xe3; BYTE $0xfd; BYTE $0x00; BYTE $0xdb; BYTE $0x93
+#define VPERMQ_0x39_Y3_Y3 BYTE $0xc4; BYTE $0xe3; BYTE $0xfd; BYTE $0x00; BYTE $0xdb; BYTE $0x39
+
+#define ROUND_AVX2(m0, m1, m2, m3, t, c40, c48) \
+	VPADDQ  m0, Y0, Y0;   \
+	VPADDQ  Y1, Y0, Y0;   \
+	VPXOR   Y0, Y3, Y3;   \
+	VPSHUFD $-79, Y3, Y3; \
+	VPADDQ  Y3, Y2, Y2;   \
+	VPXOR   Y2, Y1, Y1;   \
+	VPSHUFB c40, Y1, Y1;  \
+	VPADDQ  m1, Y0, Y0;   \
+	VPADDQ  Y1, Y0, Y0;   \
+	VPXOR   Y0, Y3, Y3;   \
+	VPSHUFB c48, Y3, Y3;  \
+	VPADDQ  Y3, Y2, Y2;   \
+	VPXOR   Y2, Y1, Y1;   \
+	VPADDQ  Y1, Y1, t;    \
+	VPSRLQ  $63, Y1, Y1;  \
+	VPXOR   t, Y1, Y1;    \
+	VPERMQ_0x39_Y1_Y1;    \
+	VPERMQ_0x4E_Y2_Y2;    \
+	VPERMQ_0x93_Y3_Y3;    \
+	VPADDQ  m2, Y0, Y0;   \
+	VPADDQ  Y1, Y0, Y0;   \
+	VPXOR   Y0, Y3, Y3;   \
+	VPSHUFD $-79, Y3, Y3; \
+	VPADDQ  Y3, Y2, Y2;   \
+	VPXOR   Y2, Y1, Y1;   \
+	VPSHUFB c40, Y1, Y1;  \
+	VPADDQ  m3, Y0, Y0;   \
+	VPADDQ  Y1, Y0, Y0;   \
+	VPXOR   Y0, Y3, Y3;   \
+	VPSHUFB c48, Y3, Y3;  \
+	VPADDQ  Y3, Y2, Y2;   \
+	VPXOR   Y2, Y1, Y1;   \
+	VPADDQ  Y1, Y1, t;    \
+	VPSRLQ  $63, Y1, Y1;  \
+	VPXOR   t, Y1, Y1;    \
+	VPERMQ_0x39_Y3_Y3;    \
+	VPERMQ_0x4E_Y2_Y2;    \
+	VPERMQ_0x93_Y1_Y1
+
+#define VMOVQ_SI_X11_0 BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x1E
+#define VMOVQ_SI_X12_0 BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x26
+#define VMOVQ_SI_X13_0 BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x2E
+#define VMOVQ_SI_X14_0 BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x36
+#define VMOVQ_SI_X15_0 BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x3E
+
+#define VMOVQ_SI_X11(n) BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x5E; BYTE $n
+#define VMOVQ_SI_X12(n) BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x66; BYTE $n
+#define VMOVQ_SI_X13(n) BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x6E; BYTE $n
+#define VMOVQ_SI_X14(n) BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x76; BYTE $n
+#define VMOVQ_SI_X15(n) BYTE $0xC5; BYTE $0x7A; BYTE $0x7E; BYTE $0x7E; BYTE $n
+
+#define VPINSRQ_1_SI_X11_0 BYTE $0xC4; BYTE $0x63; BYTE $0xA1; BYTE $0x22; BYTE $0x1E; BYTE $0x01
+#define VPINSRQ_1_SI_X12_0 BYTE $0xC4; BYTE $0x63; BYTE $0x99; BYTE $0x22; BYTE $0x26; BYTE $0x01
+#define VPINSRQ_1_SI_X13_0 BYTE $0xC4; BYTE $0x63; BYTE $0x91; BYTE $0x22; BYTE $0x2E; BYTE $0x01
+#define VPINSRQ_1_SI_X14_0 BYTE $0xC4; BYTE $0x63; BYTE $0x89; BYTE $0x22; BYTE $0x36; BYTE $0x01
+#define VPINSRQ_1_SI_X15_0 BYTE $0xC4; BYTE $0x63; BYTE $0x81; BYTE $0x22; BYTE $0x3E; BYTE $0x01
+
+#define VPINSRQ_1_SI_X11(n) BYTE $0xC4; BYTE $0x63; BYTE $0xA1; BYTE $0x22; BYTE $0x5E; BYTE $n; BYTE $0x01
+#define VPINSRQ_1_SI_X12(n) BYTE $0xC4; BYTE $0x63; BYTE $0x99; BYTE $0x22; BYTE $0x66; BYTE $n; BYTE $0x01
+#define VPINSRQ_1_SI_X13(n) BYTE $0xC4; BYTE $0x63; BYTE $0x91; BYTE $0x22; BYTE $0x6E; BYTE $n; BYTE $0x01
+#define VPINSRQ_1_SI_X14(n) BYTE $0xC4; BYTE $0x63; BYTE $0x89; BYTE $0x22; BYTE $0x76; BYTE $n; BYTE $0x01
+#define VPINSRQ_1_SI_X15(n) BYTE $0xC4; BYTE $0x63; BYTE $0x81; BYTE $0x22; BYTE $0x7E; BYTE $n; BYTE $0x01
+
+#define VMOVQ_R8_X15 BYTE $0xC4; BYTE $0x41; BYTE $0xF9; BYTE $0x6E; BYTE $0xF8
+#define VPINSRQ_1_R9_X15 BYTE $0xC4; BYTE $0x43; BYTE $0x81; BYTE $0x22; BYTE $0xF9; BYTE $0x01
+
+// load msg: Y12 = (i0, i1, i2, i3)
+// i0, i1, i2, i3 must not be 0
+#define LOAD_MSG_AVX2_Y12(i0, i1, i2, i3) \
+	VMOVQ_SI_X12(i0*8);           \
+	VMOVQ_SI_X11(i2*8);           \
+	VPINSRQ_1_SI_X12(i1*8);       \
+	VPINSRQ_1_SI_X11(i3*8);       \
+	VINSERTI128 $1, X11, Y12, Y12
+
+// load msg: Y13 = (i0, i1, i2, i3)
+// i0, i1, i2, i3 must not be 0
+#define LOAD_MSG_AVX2_Y13(i0, i1, i2, i3) \
+	VMOVQ_SI_X13(i0*8);           \
+	VMOVQ_SI_X11(i2*8);           \
+	VPINSRQ_1_SI_X13(i1*8);       \
+	VPINSRQ_1_SI_X11(i3*8);       \
+	VINSERTI128 $1, X11, Y13, Y13
+
+// load msg: Y14 = (i0, i1, i2, i3)
+// i0, i1, i2, i3 must not be 0
+#define LOAD_MSG_AVX2_Y14(i0, i1, i2, i3) \
+	VMOVQ_SI_X14(i0*8);           \
+	VMOVQ_SI_X11(i2*8);           \
+	VPINSRQ_1_SI_X14(i1*8);       \
+	VPINSRQ_1_SI_X11(i3*8);       \
+	VINSERTI128 $1, X11, Y14, Y14
+
+// load msg: Y15 = (i0, i1, i2, i3)
+// i0, i1, i2, i3 must not be 0
+#define LOAD_MSG_AVX2_Y15(i0, i1, i2, i3) \
+	VMOVQ_SI_X15(i0*8);           \
+	VMOVQ_SI_X11(i2*8);           \
+	VPINSRQ_1_SI_X15(i1*8);       \
+	VPINSRQ_1_SI_X11(i3*8);       \
+	VINSERTI128 $1, X11, Y15, Y15
+
+#define LOAD_MSG_AVX2_0_2_4_6_1_3_5_7_8_10_12_14_9_11_13_15() \
+	VMOVQ_SI_X12_0;                   \
+	VMOVQ_SI_X11(4*8);                \
+	VPINSRQ_1_SI_X12(2*8);            \
+	VPINSRQ_1_SI_X11(6*8);            \
+	VINSERTI128 $1, X11, Y12, Y12;    \
+	LOAD_MSG_AVX2_Y13(1, 3, 5, 7);    \
+	LOAD_MSG_AVX2_Y14(8, 10, 12, 14); \
+	LOAD_MSG_AVX2_Y15(9, 11, 13, 15)
+
+#define LOAD_MSG_AVX2_14_4_9_13_10_8_15_6_1_0_11_5_12_2_7_3() \
+	LOAD_MSG_AVX2_Y12(14, 4, 9, 13); \
+	LOAD_MSG_AVX2_Y13(10, 8, 15, 6); \
+	VMOVQ_SI_X11(11*8);              \
+	VPSHUFD     $0x4E, 0*8(SI), X14; \
+	VPINSRQ_1_SI_X11(5*8);           \
+	VINSERTI128 $1, X11, Y14, Y14;   \
+	LOAD_MSG_AVX2_Y15(12, 2, 7, 3)
+
+#define LOAD_MSG_AVX2_11_12_5_15_8_0_2_13_10_3_7_9_14_6_1_4() \
+	VMOVQ_SI_X11(5*8);              \
+	VMOVDQU     11*8(SI), X12;      \
+	VPINSRQ_1_SI_X11(15*8);         \
+	VINSERTI128 $1, X11, Y12, Y12;  \
+	VMOVQ_SI_X13(8*8);              \
+	VMOVQ_SI_X11(2*8);              \
+	VPINSRQ_1_SI_X13_0;             \
+	VPINSRQ_1_SI_X11(13*8);         \
+	VINSERTI128 $1, X11, Y13, Y13;  \
+	LOAD_MSG_AVX2_Y14(10, 3, 7, 9); \
+	LOAD_MSG_AVX2_Y15(14, 6, 1, 4)
+
+#define LOAD_MSG_AVX2_7_3_13_11_9_1_12_14_2_5_4_15_6_10_0_8() \
+	LOAD_MSG_AVX2_Y12(7, 3, 13, 11); \
+	LOAD_MSG_AVX2_Y13(9, 1, 12, 14); \
+	LOAD_MSG_AVX2_Y14(2, 5, 4, 15);  \
+	VMOVQ_SI_X15(6*8);               \
+	VMOVQ_SI_X11_0;                  \
+	VPINSRQ_1_SI_X15(10*8);          \
+	VPINSRQ_1_SI_X11(8*8);           \
+	VINSERTI128 $1, X11, Y15, Y15
+
+#define LOAD_MSG_AVX2_9_5_2_10_0_7_4_15_14_11_6_3_1_12_8_13() \
+	LOAD_MSG_AVX2_Y12(9, 5, 2, 10);  \
+	VMOVQ_SI_X13_0;                  \
+	VMOVQ_SI_X11(4*8);               \
+	VPINSRQ_1_SI_X13(7*8);           \
+	VPINSRQ_1_SI_X11(15*8);          \
+	VINSERTI128 $1, X11, Y13, Y13;   \
+	LOAD_MSG_AVX2_Y14(14, 11, 6, 3); \
+	LOAD_MSG_AVX2_Y15(1, 12, 8, 13)
+
+#define LOAD_MSG_AVX2_2_6_0_8_12_10_11_3_4_7_15_1_13_5_14_9() \
+	VMOVQ_SI_X12(2*8);                \
+	VMOVQ_SI_X11_0;                   \
+	VPINSRQ_1_SI_X12(6*8);            \
+	VPINSRQ_1_SI_X11(8*8);            \
+	VINSERTI128 $1, X11, Y12, Y12;    \
+	LOAD_MSG_AVX2_Y13(12, 10, 11, 3); \
+	LOAD_MSG_AVX2_Y14(4, 7, 15, 1);   \
+	LOAD_MSG_AVX2_Y15(13, 5, 14, 9)
+
+#define LOAD_MSG_AVX2_12_1_14_4_5_15_13_10_0_6_9_8_7_3_2_11() \
+	LOAD_MSG_AVX2_Y12(12, 1, 14, 4);  \
+	LOAD_MSG_AVX2_Y13(5, 15, 13, 10); \
+	VMOVQ_SI_X14_0;                   \
+	VPSHUFD     $0x4E, 8*8(SI), X11;  \
+	VPINSRQ_1_SI_X14(6*8);            \
+	VINSERTI128 $1, X11, Y14, Y14;    \
+	LOAD_MSG_AVX2_Y15(7, 3, 2, 11)
+
+#define LOAD_MSG_AVX2_13_7_12_3_11_14_1_9_5_15_8_2_0_4_6_10() \
+	LOAD_MSG_AVX2_Y12(13, 7, 12, 3); \
+	LOAD_MSG_AVX2_Y13(11, 14, 1, 9); \
+	LOAD_MSG_AVX2_Y14(5, 15, 8, 2);  \
+	VMOVQ_SI_X15_0;                  \
+	VMOVQ_SI_X11(6*8);               \
+	VPINSRQ_1_SI_X15(4*8);           \
+	VPINSRQ_1_SI_X11(10*8);          \
+	VINSERTI128 $1, X11, Y15, Y15
+
+#define LOAD_MSG_AVX2_6_14_11_0_15_9_3_8_12_13_1_10_2_7_4_5() \
+	VMOVQ_SI_X12(6*8);              \
+	VMOVQ_SI_X11(11*8);             \
+	VPINSRQ_1_SI_X12(14*8);         \
+	VPINSRQ_1_SI_X11_0;             \
+	VINSERTI128 $1, X11, Y12, Y12;  \
+	LOAD_MSG_AVX2_Y13(15, 9, 3, 8); \
+	VMOVQ_SI_X11(1*8);              \
+	VMOVDQU     12*8(SI), X14;      \
+	VPINSRQ_1_SI_X11(10*8);         \
+	VINSERTI128 $1, X11, Y14, Y14;  \
+	VMOVQ_SI_X15(2*8);              \
+	VMOVDQU     4*8(SI), X11;       \
+	VPINSRQ_1_SI_X15(7*8);          \
+	VINSERTI128 $1, X11, Y15, Y15
+
+#define LOAD_MSG_AVX2_10_8_7_1_2_4_6_5_15_9_3_13_11_14_12_0() \
+	LOAD_MSG_AVX2_Y12(10, 8, 7, 1);  \
+	VMOVQ_SI_X13(2*8);               \
+	VPSHUFD     $0x4E, 5*8(SI), X11; \
+	VPINSRQ_1_SI_X13(4*8);           \
+	VINSERTI128 $1, X11, Y13, Y13;   \
+	LOAD_MSG_AVX2_Y14(15, 9, 3, 13); \
+	VMOVQ_SI_X15(11*8);              \
+	VMOVQ_SI_X11(12*8);              \
+	VPINSRQ_1_SI_X15(14*8);          \
+	VPINSRQ_1_SI_X11_0;              \
+	VINSERTI128 $1, X11, Y15, Y15
+
+// func hashBlocksAVX2(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+TEXT ·hashBlocksAVX2(SB), 4, $320-48 // frame size = 288 + 32 byte alignment
+	MOVQ h+0(FP), AX
+	MOVQ c+8(FP), BX
+	MOVQ flag+16(FP), CX
+	MOVQ blocks_base+24(FP), SI
+	MOVQ blocks_len+32(FP), DI
+
+	MOVQ SP, DX
+	ADDQ $31, DX
+	ANDQ $~31, DX
+
+	MOVQ CX, 16(DX)
+	XORQ CX, CX
+	MOVQ CX, 24(DX)
+
+	VMOVDQU ·AVX2_c40<>(SB), Y4
+	VMOVDQU ·AVX2_c48<>(SB), Y5
+
+	VMOVDQU 0(AX), Y8
+	VMOVDQU 32(AX), Y9
+	VMOVDQU ·AVX2_iv0<>(SB), Y6
+	VMOVDQU ·AVX2_iv1<>(SB), Y7
+
+	MOVQ 0(BX), R8
+	MOVQ 8(BX), R9
+	MOVQ R9, 8(DX)
+
+loop:
+	ADDQ $128, R8
+	MOVQ R8, 0(DX)
+	CMPQ R8, $128
+	JGE  noinc
+	INCQ R9
+	MOVQ R9, 8(DX)
+
+noinc:
+	VMOVDQA Y8, Y0
+	VMOVDQA Y9, Y1
+	VMOVDQA Y6, Y2
+	VPXOR   0(DX), Y7, Y3
+
+	LOAD_MSG_AVX2_0_2_4_6_1_3_5_7_8_10_12_14_9_11_13_15()
+	VMOVDQA Y12, 32(DX)
+	VMOVDQA Y13, 64(DX)
+	VMOVDQA Y14, 96(DX)
+	VMOVDQA Y15, 128(DX)
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_14_4_9_13_10_8_15_6_1_0_11_5_12_2_7_3()
+	VMOVDQA Y12, 160(DX)
+	VMOVDQA Y13, 192(DX)
+	VMOVDQA Y14, 224(DX)
+	VMOVDQA Y15, 256(DX)
+
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_11_12_5_15_8_0_2_13_10_3_7_9_14_6_1_4()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_7_3_13_11_9_1_12_14_2_5_4_15_6_10_0_8()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_9_5_2_10_0_7_4_15_14_11_6_3_1_12_8_13()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_2_6_0_8_12_10_11_3_4_7_15_1_13_5_14_9()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_12_1_14_4_5_15_13_10_0_6_9_8_7_3_2_11()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_13_7_12_3_11_14_1_9_5_15_8_2_0_4_6_10()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_6_14_11_0_15_9_3_8_12_13_1_10_2_7_4_5()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+	LOAD_MSG_AVX2_10_8_7_1_2_4_6_5_15_9_3_13_11_14_12_0()
+	ROUND_AVX2(Y12, Y13, Y14, Y15, Y10, Y4, Y5)
+
+	ROUND_AVX2(32(DX), 64(DX), 96(DX), 128(DX), Y10, Y4, Y5)
+	ROUND_AVX2(160(DX), 192(DX), 224(DX), 256(DX), Y10, Y4, Y5)
+
+	VPXOR Y0, Y8, Y8
+	VPXOR Y1, Y9, Y9
+	VPXOR Y2, Y8, Y8
+	VPXOR Y3, Y9, Y9
+
+	LEAQ 128(SI), SI
+	SUBQ $128, DI
+	JNE  loop
+
+	MOVQ R8, 0(BX)
+	MOVQ R9, 8(BX)
+
+	VMOVDQU Y8, 0(AX)
+	VMOVDQU Y9, 32(AX)
+	VZEROUPPER
+
+	RET
+
+#define VPUNPCKLQDQ_X2_X2_X15 BYTE $0xC5; BYTE $0x69; BYTE $0x6C; BYTE $0xFA
+#define VPUNPCKLQDQ_X3_X3_X15 BYTE $0xC5; BYTE $0x61; BYTE $0x6C; BYTE $0xFB
+#define VPUNPCKLQDQ_X7_X7_X15 BYTE $0xC5; BYTE $0x41; BYTE $0x6C; BYTE $0xFF
+#define VPUNPCKLQDQ_X13_X13_X15 BYTE $0xC4; BYTE $0x41; BYTE $0x11; BYTE $0x6C; BYTE $0xFD
+#define VPUNPCKLQDQ_X14_X14_X15 BYTE $0xC4; BYTE $0x41; BYTE $0x09; BYTE $0x6C; BYTE $0xFE
+
+#define VPUNPCKHQDQ_X15_X2_X2 BYTE $0xC4; BYTE $0xC1; BYTE $0x69; BYTE $0x6D; BYTE $0xD7
+#define VPUNPCKHQDQ_X15_X3_X3 BYTE $0xC4; BYTE $0xC1; BYTE $0x61; BYTE $0x6D; BYTE $0xDF
+#define VPUNPCKHQDQ_X15_X6_X6 BYTE $0xC4; BYTE $0xC1; BYTE $0x49; BYTE $0x6D; BYTE $0xF7
+#define VPUNPCKHQDQ_X15_X7_X7 BYTE $0xC4; BYTE $0xC1; BYTE $0x41; BYTE $0x6D; BYTE $0xFF
+#define VPUNPCKHQDQ_X15_X3_X2 BYTE $0xC4; BYTE $0xC1; BYTE $0x61; BYTE $0x6D; BYTE $0xD7
+#define VPUNPCKHQDQ_X15_X7_X6 BYTE $0xC4; BYTE $0xC1; BYTE $0x41; BYTE $0x6D; BYTE $0xF7
+#define VPUNPCKHQDQ_X15_X13_X3 BYTE $0xC4; BYTE $0xC1; BYTE $0x11; BYTE $0x6D; BYTE $0xDF
+#define VPUNPCKHQDQ_X15_X13_X7 BYTE $0xC4; BYTE $0xC1; BYTE $0x11; BYTE $0x6D; BYTE $0xFF
+
+#define SHUFFLE_AVX() \
+	VMOVDQA X6, X13;         \
+	VMOVDQA X2, X14;         \
+	VMOVDQA X4, X6;          \
+	VPUNPCKLQDQ_X13_X13_X15; \
+	VMOVDQA X5, X4;          \
+	VMOVDQA X6, X5;          \
+	VPUNPCKHQDQ_X15_X7_X6;   \
+	VPUNPCKLQDQ_X7_X7_X15;   \
+	VPUNPCKHQDQ_X15_X13_X7;  \
+	VPUNPCKLQDQ_X3_X3_X15;   \
+	VPUNPCKHQDQ_X15_X2_X2;   \
+	VPUNPCKLQDQ_X14_X14_X15; \
+	VPUNPCKHQDQ_X15_X3_X3;   \
+
+#define SHUFFLE_AVX_INV() \
+	VMOVDQA X2, X13;         \
+	VMOVDQA X4, X14;         \
+	VPUNPCKLQDQ_X2_X2_X15;   \
+	VMOVDQA X5, X4;          \
+	VPUNPCKHQDQ_X15_X3_X2;   \
+	VMOVDQA X14, X5;         \
+	VPUNPCKLQDQ_X3_X3_X15;   \
+	VMOVDQA X6, X14;         \
+	VPUNPCKHQDQ_X15_X13_X3;  \
+	VPUNPCKLQDQ_X7_X7_X15;   \
+	VPUNPCKHQDQ_X15_X6_X6;   \
+	VPUNPCKLQDQ_X14_X14_X15; \
+	VPUNPCKHQDQ_X15_X7_X7;   \
+
+#define HALF_ROUND_AVX(v0, v1, v2, v3, v4, v5, v6, v7, m0, m1, m2, m3, t0, c40, c48) \
+	VPADDQ  m0, v0, v0;   \
+	VPADDQ  v2, v0, v0;   \
+	VPADDQ  m1, v1, v1;   \
+	VPADDQ  v3, v1, v1;   \
+	VPXOR   v0, v6, v6;   \
+	VPXOR   v1, v7, v7;   \
+	VPSHUFD $-79, v6, v6; \
+	VPSHUFD $-79, v7, v7; \
+	VPADDQ  v6, v4, v4;   \
+	VPADDQ  v7, v5, v5;   \
+	VPXOR   v4, v2, v2;   \
+	VPXOR   v5, v3, v3;   \
+	VPSHUFB c40, v2, v2;  \
+	VPSHUFB c40, v3, v3;  \
+	VPADDQ  m2, v0, v0;   \
+	VPADDQ  v2, v0, v0;   \
+	VPADDQ  m3, v1, v1;   \
+	VPADDQ  v3, v1, v1;   \
+	VPXOR   v0, v6, v6;   \
+	VPXOR   v1, v7, v7;   \
+	VPSHUFB c48, v6, v6;  \
+	VPSHUFB c48, v7, v7;  \
+	VPADDQ  v6, v4, v4;   \
+	VPADDQ  v7, v5, v5;   \
+	VPXOR   v4, v2, v2;   \
+	VPXOR   v5, v3, v3;   \
+	VPADDQ  v2, v2, t0;   \
+	VPSRLQ  $63, v2, v2;  \
+	VPXOR   t0, v2, v2;   \
+	VPADDQ  v3, v3, t0;   \
+	VPSRLQ  $63, v3, v3;  \
+	VPXOR   t0, v3, v3
+
+// load msg: X12 = (i0, i1), X13 = (i2, i3), X14 = (i4, i5), X15 = (i6, i7)
+// i0, i1, i2, i3, i4, i5, i6, i7 must not be 0
+#define LOAD_MSG_AVX(i0, i1, i2, i3, i4, i5, i6, i7) \
+	VMOVQ_SI_X12(i0*8);     \
+	VMOVQ_SI_X13(i2*8);     \
+	VMOVQ_SI_X14(i4*8);     \
+	VMOVQ_SI_X15(i6*8);     \
+	VPINSRQ_1_SI_X12(i1*8); \
+	VPINSRQ_1_SI_X13(i3*8); \
+	VPINSRQ_1_SI_X14(i5*8); \
+	VPINSRQ_1_SI_X15(i7*8)
+
+// load msg: X12 = (0, 2), X13 = (4, 6), X14 = (1, 3), X15 = (5, 7)
+#define LOAD_MSG_AVX_0_2_4_6_1_3_5_7() \
+	VMOVQ_SI_X12_0;        \
+	VMOVQ_SI_X13(4*8);     \
+	VMOVQ_SI_X14(1*8);     \
+	VMOVQ_SI_X15(5*8);     \
+	VPINSRQ_1_SI_X12(2*8); \
+	VPINSRQ_1_SI_X13(6*8); \
+	VPINSRQ_1_SI_X14(3*8); \
+	VPINSRQ_1_SI_X15(7*8)
+
+// load msg: X12 = (1, 0), X13 = (11, 5), X14 = (12, 2), X15 = (7, 3)
+#define LOAD_MSG_AVX_1_0_11_5_12_2_7_3() \
+	VPSHUFD $0x4E, 0*8(SI), X12; \
+	VMOVQ_SI_X13(11*8);          \
+	VMOVQ_SI_X14(12*8);          \
+	VMOVQ_SI_X15(7*8);           \
+	VPINSRQ_1_SI_X13(5*8);       \
+	VPINSRQ_1_SI_X14(2*8);       \
+	VPINSRQ_1_SI_X15(3*8)
+
+// load msg: X12 = (11, 12), X13 = (5, 15), X14 = (8, 0), X15 = (2, 13)
+#define LOAD_MSG_AVX_11_12_5_15_8_0_2_13() \
+	VMOVDQU 11*8(SI), X12;  \
+	VMOVQ_SI_X13(5*8);      \
+	VMOVQ_SI_X14(8*8);      \
+	VMOVQ_SI_X15(2*8);      \
+	VPINSRQ_1_SI_X13(15*8); \
+	VPINSRQ_1_SI_X14_0;     \
+	VPINSRQ_1_SI_X15(13*8)
+
+// load msg: X12 = (2, 5), X13 = (4, 15), X14 = (6, 10), X15 = (0, 8)
+#define LOAD_MSG_AVX_2_5_4_15_6_10_0_8() \
+	VMOVQ_SI_X12(2*8);      \
+	VMOVQ_SI_X13(4*8);      \
+	VMOVQ_SI_X14(6*8);      \
+	VMOVQ_SI_X15_0;         \
+	VPINSRQ_1_SI_X12(5*8);  \
+	VPINSRQ_1_SI_X13(15*8); \
+	VPINSRQ_1_SI_X14(10*8); \
+	VPINSRQ_1_SI_X15(8*8)
+
+// load msg: X12 = (9, 5), X13 = (2, 10), X14 = (0, 7), X15 = (4, 15)
+#define LOAD_MSG_AVX_9_5_2_10_0_7_4_15() \
+	VMOVQ_SI_X12(9*8);      \
+	VMOVQ_SI_X13(2*8);      \
+	VMOVQ_SI_X14_0;         \
+	VMOVQ_SI_X15(4*8);      \
+	VPINSRQ_1_SI_X12(5*8);  \
+	VPINSRQ_1_SI_X13(10*8); \
+	VPINSRQ_1_SI_X14(7*8);  \
+	VPINSRQ_1_SI_X15(15*8)
+
+// load msg: X12 = (2, 6), X13 = (0, 8), X14 = (12, 10), X15 = (11, 3)
+#define LOAD_MSG_AVX_2_6_0_8_12_10_11_3() \
+	VMOVQ_SI_X12(2*8);      \
+	VMOVQ_SI_X13_0;         \
+	VMOVQ_SI_X14(12*8);     \
+	VMOVQ_SI_X15(11*8);     \
+	VPINSRQ_1_SI_X12(6*8);  \
+	VPINSRQ_1_SI_X13(8*8);  \
+	VPINSRQ_1_SI_X14(10*8); \
+	VPINSRQ_1_SI_X15(3*8)
+
+// load msg: X12 = (0, 6), X13 = (9, 8), X14 = (7, 3), X15 = (2, 11)
+#define LOAD_MSG_AVX_0_6_9_8_7_3_2_11() \
+	MOVQ    0*8(SI), X12;        \
+	VPSHUFD $0x4E, 8*8(SI), X13; \
+	MOVQ    7*8(SI), X14;        \
+	MOVQ    2*8(SI), X15;        \
+	VPINSRQ_1_SI_X12(6*8);       \
+	VPINSRQ_1_SI_X14(3*8);       \
+	VPINSRQ_1_SI_X15(11*8)
+
+// load msg: X12 = (6, 14), X13 = (11, 0), X14 = (15, 9), X15 = (3, 8)
+#define LOAD_MSG_AVX_6_14_11_0_15_9_3_8() \
+	MOVQ 6*8(SI), X12;      \
+	MOVQ 11*8(SI), X13;     \
+	MOVQ 15*8(SI), X14;     \
+	MOVQ 3*8(SI), X15;      \
+	VPINSRQ_1_SI_X12(14*8); \
+	VPINSRQ_1_SI_X13_0;     \
+	VPINSRQ_1_SI_X14(9*8);  \
+	VPINSRQ_1_SI_X15(8*8)
+
+// load msg: X12 = (5, 15), X13 = (8, 2), X14 = (0, 4), X15 = (6, 10)
+#define LOAD_MSG_AVX_5_15_8_2_0_4_6_10() \
+	MOVQ 5*8(SI), X12;      \
+	MOVQ 8*8(SI), X13;      \
+	MOVQ 0*8(SI), X14;      \
+	MOVQ 6*8(SI), X15;      \
+	VPINSRQ_1_SI_X12(15*8); \
+	VPINSRQ_1_SI_X13(2*8);  \
+	VPINSRQ_1_SI_X14(4*8);  \
+	VPINSRQ_1_SI_X15(10*8)
+
+// load msg: X12 = (12, 13), X13 = (1, 10), X14 = (2, 7), X15 = (4, 5)
+#define LOAD_MSG_AVX_12_13_1_10_2_7_4_5() \
+	VMOVDQU 12*8(SI), X12;  \
+	MOVQ    1*8(SI), X13;   \
+	MOVQ    2*8(SI), X14;   \
+	VPINSRQ_1_SI_X13(10*8); \
+	VPINSRQ_1_SI_X14(7*8);  \
+	VMOVDQU 4*8(SI), X15
+
+// load msg: X12 = (15, 9), X13 = (3, 13), X14 = (11, 14), X15 = (12, 0)
+#define LOAD_MSG_AVX_15_9_3_13_11_14_12_0() \
+	MOVQ 15*8(SI), X12;     \
+	MOVQ 3*8(SI), X13;      \
+	MOVQ 11*8(SI), X14;     \
+	MOVQ 12*8(SI), X15;     \
+	VPINSRQ_1_SI_X12(9*8);  \
+	VPINSRQ_1_SI_X13(13*8); \
+	VPINSRQ_1_SI_X14(14*8); \
+	VPINSRQ_1_SI_X15_0
+
+// func hashBlocksAVX(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+TEXT ·hashBlocksAVX(SB), 4, $288-48 // frame size = 272 + 16 byte alignment
+	MOVQ h+0(FP), AX
+	MOVQ c+8(FP), BX
+	MOVQ flag+16(FP), CX
+	MOVQ blocks_base+24(FP), SI
+	MOVQ blocks_len+32(FP), DI
+
+	MOVQ SP, R10
+	ADDQ $15, R10
+	ANDQ $~15, R10
+
+	VMOVDQU ·AVX_c40<>(SB), X0
+	VMOVDQU ·AVX_c48<>(SB), X1
+	VMOVDQA X0, X8
+	VMOVDQA X1, X9
+
+	VMOVDQU ·AVX_iv3<>(SB), X0
+	VMOVDQA X0, 0(R10)
+	XORQ    CX, 0(R10)          // 0(R10) = ·AVX_iv3 ^ (CX || 0)
+
+	VMOVDQU 0(AX), X10
+	VMOVDQU 16(AX), X11
+	VMOVDQU 32(AX), X2
+	VMOVDQU 48(AX), X3
+
+	MOVQ 0(BX), R8
+	MOVQ 8(BX), R9
+
+loop:
+	ADDQ $128, R8
+	CMPQ R8, $128
+	JGE  noinc
+	INCQ R9
+
+noinc:
+	VMOVQ_R8_X15
+	VPINSRQ_1_R9_X15
+
+	VMOVDQA X10, X0
+	VMOVDQA X11, X1
+	VMOVDQU ·AVX_iv0<>(SB), X4
+	VMOVDQU ·AVX_iv1<>(SB), X5
+	VMOVDQU ·AVX_iv2<>(SB), X6
+
+	VPXOR   X15, X6, X6
+	VMOVDQA 0(R10), X7
+
+	LOAD_MSG_AVX_0_2_4_6_1_3_5_7()
+	VMOVDQA X12, 16(R10)
+	VMOVDQA X13, 32(R10)
+	VMOVDQA X14, 48(R10)
+	VMOVDQA X15, 64(R10)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX(8, 10, 12, 14, 9, 11, 13, 15)
+	VMOVDQA X12, 80(R10)
+	VMOVDQA X13, 96(R10)
+	VMOVDQA X14, 112(R10)
+	VMOVDQA X15, 128(R10)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX(14, 4, 9, 13, 10, 8, 15, 6)
+	VMOVDQA X12, 144(R10)
+	VMOVDQA X13, 160(R10)
+	VMOVDQA X14, 176(R10)
+	VMOVDQA X15, 192(R10)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_1_0_11_5_12_2_7_3()
+	VMOVDQA X12, 208(R10)
+	VMOVDQA X13, 224(R10)
+	VMOVDQA X14, 240(R10)
+	VMOVDQA X15, 256(R10)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX_11_12_5_15_8_0_2_13()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX(10, 3, 7, 9, 14, 6, 1, 4)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX(7, 3, 13, 11, 9, 1, 12, 14)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_2_5_4_15_6_10_0_8()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX_9_5_2_10_0_7_4_15()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX(14, 11, 6, 3, 1, 12, 8, 13)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX_2_6_0_8_12_10_11_3()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX(4, 7, 15, 1, 13, 5, 14, 9)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX(12, 1, 14, 4, 5, 15, 13, 10)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_0_6_9_8_7_3_2_11()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX(13, 7, 12, 3, 11, 14, 1, 9)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_5_15_8_2_0_4_6_10()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX_6_14_11_0_15_9_3_8()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_12_13_1_10_2_7_4_5()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	LOAD_MSG_AVX(10, 8, 7, 1, 2, 4, 6, 5)
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX()
+	LOAD_MSG_AVX_15_9_3_13_11_14_12_0()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15, X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, 16(R10), 32(R10), 48(R10), 64(R10), X15, X8, X9)
+	SHUFFLE_AVX()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, 80(R10), 96(R10), 112(R10), 128(R10), X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, 144(R10), 160(R10), 176(R10), 192(R10), X15, X8, X9)
+	SHUFFLE_AVX()
+	HALF_ROUND_AVX(X0, X1, X2, X3, X4, X5, X6, X7, 208(R10), 224(R10), 240(R10), 256(R10), X15, X8, X9)
+	SHUFFLE_AVX_INV()
+
+	VMOVDQU 32(AX), X14
+	VMOVDQU 48(AX), X15
+	VPXOR   X0, X10, X10
+	VPXOR   X1, X11, X11
+	VPXOR   X2, X14, X14
+	VPXOR   X3, X15, X15
+	VPXOR   X4, X10, X10
+	VPXOR   X5, X11, X11
+	VPXOR   X6, X14, X2
+	VPXOR   X7, X15, X3
+	VMOVDQU X2, 32(AX)
+	VMOVDQU X3, 48(AX)
+
+	LEAQ 128(SI), SI
+	SUBQ $128, DI
+	JNE  loop
+
+	VMOVDQU X10, 0(AX)
+	VMOVDQU X11, 16(AX)
+
+	MOVQ R8, 0(BX)
+	MOVQ R9, 8(BX)
+	VZEROUPPER
+
+	RET

vendor/golang.org/x/crypto/blake2b/blake2b_amd64.go

@@ -0,0 +1,25 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.7 && amd64 && gc && !purego
+// +build !go1.7,amd64,gc,!purego
+
+package blake2b
+
+import "golang.org/x/sys/cpu"
+
+func init() {
+	useSSE4 = cpu.X86.HasSSE41
+}
+
+//go:noescape
+func hashBlocksSSE4(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+
+func hashBlocks(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte) {
+	if useSSE4 {
+		hashBlocksSSE4(h, c, flag, blocks)
+	} else {
+		hashBlocksGeneric(h, c, flag, blocks)
+	}
+}

vendor/golang.org/x/crypto/blake2b/blake2b_amd64.s

@@ -0,0 +1,279 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build amd64 && gc && !purego
+// +build amd64,gc,!purego
+
+#include "textflag.h"
+
+DATA ·iv0<>+0x00(SB)/8, $0x6a09e667f3bcc908
+DATA ·iv0<>+0x08(SB)/8, $0xbb67ae8584caa73b
+GLOBL ·iv0<>(SB), (NOPTR+RODATA), $16
+
+DATA ·iv1<>+0x00(SB)/8, $0x3c6ef372fe94f82b
+DATA ·iv1<>+0x08(SB)/8, $0xa54ff53a5f1d36f1
+GLOBL ·iv1<>(SB), (NOPTR+RODATA), $16
+
+DATA ·iv2<>+0x00(SB)/8, $0x510e527fade682d1
+DATA ·iv2<>+0x08(SB)/8, $0x9b05688c2b3e6c1f
+GLOBL ·iv2<>(SB), (NOPTR+RODATA), $16
+
+DATA ·iv3<>+0x00(SB)/8, $0x1f83d9abfb41bd6b
+DATA ·iv3<>+0x08(SB)/8, $0x5be0cd19137e2179
+GLOBL ·iv3<>(SB), (NOPTR+RODATA), $16
+
+DATA ·c40<>+0x00(SB)/8, $0x0201000706050403
+DATA ·c40<>+0x08(SB)/8, $0x0a09080f0e0d0c0b
+GLOBL ·c40<>(SB), (NOPTR+RODATA), $16
+
+DATA ·c48<>+0x00(SB)/8, $0x0100070605040302
+DATA ·c48<>+0x08(SB)/8, $0x09080f0e0d0c0b0a
+GLOBL ·c48<>(SB), (NOPTR+RODATA), $16
+
+#define SHUFFLE(v2, v3, v4, v5, v6, v7, t1, t2) \
+	MOVO       v4, t1; \
+	MOVO       v5, v4; \
+	MOVO       t1, v5; \
+	MOVO       v6, t1; \
+	PUNPCKLQDQ v6, t2; \
+	PUNPCKHQDQ v7, v6; \
+	PUNPCKHQDQ t2, v6; \
+	PUNPCKLQDQ v7, t2; \
+	MOVO       t1, v7; \
+	MOVO       v2, t1; \
+	PUNPCKHQDQ t2, v7; \
+	PUNPCKLQDQ v3, t2; \
+	PUNPCKHQDQ t2, v2; \
+	PUNPCKLQDQ t1, t2; \
+	PUNPCKHQDQ t2, v3
+
+#define SHUFFLE_INV(v2, v3, v4, v5, v6, v7, t1, t2) \
+	MOVO       v4, t1; \
+	MOVO       v5, v4; \
+	MOVO       t1, v5; \
+	MOVO       v2, t1; \
+	PUNPCKLQDQ v2, t2; \
+	PUNPCKHQDQ v3, v2; \
+	PUNPCKHQDQ t2, v2; \
+	PUNPCKLQDQ v3, t2; \
+	MOVO       t1, v3; \
+	MOVO       v6, t1; \
+	PUNPCKHQDQ t2, v3; \
+	PUNPCKLQDQ v7, t2; \
+	PUNPCKHQDQ t2, v6; \
+	PUNPCKLQDQ t1, t2; \
+	PUNPCKHQDQ t2, v7
+
+#define HALF_ROUND(v0, v1, v2, v3, v4, v5, v6, v7, m0, m1, m2, m3, t0, c40, c48) \
+	PADDQ  m0, v0;        \
+	PADDQ  m1, v1;        \
+	PADDQ  v2, v0;        \
+	PADDQ  v3, v1;        \
+	PXOR   v0, v6;        \
+	PXOR   v1, v7;        \
+	PSHUFD $0xB1, v6, v6; \
+	PSHUFD $0xB1, v7, v7; \
+	PADDQ  v6, v4;        \
+	PADDQ  v7, v5;        \
+	PXOR   v4, v2;        \
+	PXOR   v5, v3;        \
+	PSHUFB c40, v2;       \
+	PSHUFB c40, v3;       \
+	PADDQ  m2, v0;        \
+	PADDQ  m3, v1;        \
+	PADDQ  v2, v0;        \
+	PADDQ  v3, v1;        \
+	PXOR   v0, v6;        \
+	PXOR   v1, v7;        \
+	PSHUFB c48, v6;       \
+	PSHUFB c48, v7;       \
+	PADDQ  v6, v4;        \
+	PADDQ  v7, v5;        \
+	PXOR   v4, v2;        \
+	PXOR   v5, v3;        \
+	MOVOU  v2, t0;        \
+	PADDQ  v2, t0;        \
+	PSRLQ  $63, v2;       \
+	PXOR   t0, v2;        \
+	MOVOU  v3, t0;        \
+	PADDQ  v3, t0;        \
+	PSRLQ  $63, v3;       \
+	PXOR   t0, v3
+
+#define LOAD_MSG(m0, m1, m2, m3, src, i0, i1, i2, i3, i4, i5, i6, i7) \
+	MOVQ   i0*8(src), m0;     \
+	PINSRQ $1, i1*8(src), m0; \
+	MOVQ   i2*8(src), m1;     \
+	PINSRQ $1, i3*8(src), m1; \
+	MOVQ   i4*8(src), m2;     \
+	PINSRQ $1, i5*8(src), m2; \
+	MOVQ   i6*8(src), m3;     \
+	PINSRQ $1, i7*8(src), m3
+
+// func hashBlocksSSE4(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
+TEXT ·hashBlocksSSE4(SB), 4, $288-48 // frame size = 272 + 16 byte alignment
+	MOVQ h+0(FP), AX
+	MOVQ c+8(FP), BX
+	MOVQ flag+16(FP), CX
+	MOVQ blocks_base+24(FP), SI
+	MOVQ blocks_len+32(FP), DI
+
+	MOVQ SP, R10
+	ADDQ $15, R10
+	ANDQ $~15, R10
+
+	MOVOU ·iv3<>(SB), X0
+	MOVO  X0, 0(R10)
+	XORQ  CX, 0(R10)     // 0(R10) = ·iv3 ^ (CX || 0)
+
+	MOVOU ·c40<>(SB), X13
+	MOVOU ·c48<>(SB), X14
+
+	MOVOU 0(AX), X12
+	MOVOU 16(AX), X15
+
+	MOVQ 0(BX), R8
+	MOVQ 8(BX), R9
+
+loop:
+	ADDQ $128, R8
+	CMPQ R8, $128
+	JGE  noinc
+	INCQ R9
+
+noinc:
+	MOVQ R8, X8
+	PINSRQ $1, R9, X8
+
+	MOVO X12, X0
+	MOVO X15, X1
+	MOVOU 32(AX), X2
+	MOVOU 48(AX), X3
+	MOVOU ·iv0<>(SB), X4
+	MOVOU ·iv1<>(SB), X5
+	MOVOU ·iv2<>(SB), X6
+
+	PXOR X8, X6
+	MOVO 0(R10), X7
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 0, 2, 4, 6, 1, 3, 5, 7)
+	MOVO X8, 16(R10)
+	MOVO X9, 32(R10)
+	MOVO X10, 48(R10)
+	MOVO X11, 64(R10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 8, 10, 12, 14, 9, 11, 13, 15)
+	MOVO X8, 80(R10)
+	MOVO X9, 96(R10)
+	MOVO X10, 112(R10)
+	MOVO X11, 128(R10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 14, 4, 9, 13, 10, 8, 15, 6)
+	MOVO X8, 144(R10)
+	MOVO X9, 160(R10)
+	MOVO X10, 176(R10)
+	MOVO X11, 192(R10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 1, 0, 11, 5, 12, 2, 7, 3)
+	MOVO X8, 208(R10)
+	MOVO X9, 224(R10)
+	MOVO X10, 240(R10)
+	MOVO X11, 256(R10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 11, 12, 5, 15, 8, 0, 2, 13)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 10, 3, 7, 9, 14, 6, 1, 4)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 7, 3, 13, 11, 9, 1, 12, 14)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 2, 5, 4, 15, 6, 10, 0, 8)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 9, 5, 2, 10, 0, 7, 4, 15)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 14, 11, 6, 3, 1, 12, 8, 13)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 2, 6, 0, 8, 12, 10, 11, 3)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 4, 7, 15, 1, 13, 5, 14, 9)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 12, 1, 14, 4, 5, 15, 13, 10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 0, 6, 9, 8, 7, 3, 2, 11)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 13, 7, 12, 3, 11, 14, 1, 9)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 5, 15, 8, 2, 0, 4, 6, 10)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 6, 14, 11, 0, 15, 9, 3, 8)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 12, 13, 1, 10, 2, 7, 4, 5)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	LOAD_MSG(X8, X9, X10, X11, SI, 10, 8, 7, 1, 2, 4, 6, 5)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	LOAD_MSG(X8, X9, X10, X11, SI, 15, 9, 3, 13, 11, 14, 12, 0)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, 16(R10), 32(R10), 48(R10), 64(R10), X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, 80(R10), 96(R10), 112(R10), 128(R10), X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, 144(R10), 160(R10), 176(R10), 192(R10), X11, X13, X14)
+	SHUFFLE(X2, X3, X4, X5, X6, X7, X8, X9)
+	HALF_ROUND(X0, X1, X2, X3, X4, X5, X6, X7, 208(R10), 224(R10), 240(R10), 256(R10), X11, X13, X14)
+	SHUFFLE_INV(X2, X3, X4, X5, X6, X7, X8, X9)
+
+	MOVOU 32(AX), X10
+	MOVOU 48(AX), X11
+	PXOR  X0, X12
+	PXOR  X1, X15
+	PXOR  X2, X10
+	PXOR  X3, X11
+	PXOR  X4, X12
+	PXOR  X5, X15
+	PXOR  X6, X10
+	PXOR  X7, X11
+	MOVOU X10, 32(AX)
+	MOVOU X11, 48(AX)
+
+	LEAQ 128(SI), SI
+	SUBQ $128, DI
+	JNE  loop
+
+	MOVOU X12, 0(AX)
+	MOVOU X15, 16(AX)
+
+	MOVQ R8, 0(BX)
+	MOVQ R9, 8(BX)
+
+	RET

vendor/golang.org/x/crypto/blake2b/blake2b_generic.go

@@ -0,0 +1,182 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package blake2b
+
+import (
+	"encoding/binary"
+	"math/bits"
+)
+
+// the precomputed values for BLAKE2b
+// there are 12 16-byte arrays - one for each round
+// the entries are calculated from the sigma constants.
+var precomputed = [12][16]byte{
+	{0, 2, 4, 6, 1, 3, 5, 7, 8, 10, 12, 14, 9, 11, 13, 15},
+	{14, 4, 9, 13, 10, 8, 15, 6, 1, 0, 11, 5, 12, 2, 7, 3},
+	{11, 12, 5, 15, 8, 0, 2, 13, 10, 3, 7, 9, 14, 6, 1, 4},
+	{7, 3, 13, 11, 9, 1, 12, 14, 2, 5, 4, 15, 6, 10, 0, 8},
+	{9, 5, 2, 10, 0, 7, 4, 15, 14, 11, 6, 3, 1, 12, 8, 13},
+	{2, 6, 0, 8, 12, 10, 11, 3, 4, 7, 15, 1, 13, 5, 14, 9},
+	{12, 1, 14, 4, 5, 15, 13, 10, 0, 6, 9, 8, 7, 3, 2, 11},
+	{13, 7, 12, 3, 11, 14, 1, 9, 5, 15, 8, 2, 0, 4, 6, 10},
+	{6, 14, 11, 0, 15, 9, 3, 8, 12, 13, 1, 10, 2, 7, 4, 5},
+	{10, 8, 7, 1, 2, 4, 6, 5, 15, 9, 3, 13, 11, 14, 12, 0},
+	{0, 2, 4, 6, 1, 3, 5, 7, 8, 10, 12, 14, 9, 11, 13, 15}, // equal to the first
+	{14, 4, 9, 13, 10, 8, 15, 6, 1, 0, 11, 5, 12, 2, 7, 3}, // equal to the second
+}
+
+func hashBlocksGeneric(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte) {
+	var m [16]uint64
+	c0, c1 := c[0], c[1]
+
+	for i := 0; i < len(blocks); {
+		c0 += BlockSize
+		if c0 < BlockSize {
+			c1++
+		}
+
+		v0, v1, v2, v3, v4, v5, v6, v7 := h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7]
+		v8, v9, v10, v11, v12, v13, v14, v15 := iv[0], iv[1], iv[2], iv[3], iv[4], iv[5], iv[6], iv[7]
+		v12 ^= c0
+		v13 ^= c1
+		v14 ^= flag
+
+		for j := range m {
+			m[j] = binary.LittleEndian.Uint64(blocks[i:])
+			i += 8
+		}
+
+		for j := range precomputed {
+			s := &(precomputed[j])
+
+			v0 += m[s[0]]
+			v0 += v4
+			v12 ^= v0
+			v12 = bits.RotateLeft64(v12, -32)
+			v8 += v12
+			v4 ^= v8
+			v4 = bits.RotateLeft64(v4, -24)
+			v1 += m[s[1]]
+			v1 += v5
+			v13 ^= v1
+			v13 = bits.RotateLeft64(v13, -32)
+			v9 += v13
+			v5 ^= v9
+			v5 = bits.RotateLeft64(v5, -24)
+			v2 += m[s[2]]
+			v2 += v6
+			v14 ^= v2
+			v14 = bits.RotateLeft64(v14, -32)
+			v10 += v14
+			v6 ^= v10
+			v6 = bits.RotateLeft64(v6, -24)
+			v3 += m[s[3]]
+			v3 += v7
+			v15 ^= v3
+			v15 = bits.RotateLeft64(v15, -32)
+			v11 += v15
+			v7 ^= v11
+			v7 = bits.RotateLeft64(v7, -24)
+
+			v0 += m[s[4]]
+			v0 += v4
+			v12 ^= v0
+			v12 = bits.RotateLeft64(v12, -16)
+			v8 += v12
+			v4 ^= v8
+			v4 = bits.RotateLeft64(v4, -63)
+			v1 += m[s[5]]
+			v1 += v5
+			v13 ^= v1
+			v13 = bits.RotateLeft64(v13, -16)
+			v9 += v13
+			v5 ^= v9
+			v5 = bits.RotateLeft64(v5, -63)
+			v2 += m[s[6]]
+			v2 += v6
+			v14 ^= v2
+			v14 = bits.RotateLeft64(v14, -16)
+			v10 += v14
+			v6 ^= v10
+			v6 = bits.RotateLeft64(v6, -63)
+			v3 += m[s[7]]
+			v3 += v7
+			v15 ^= v3
+			v15 = bits.RotateLeft64(v15, -16)
+			v11 += v15
+			v7 ^= v11
+			v7 = bits.RotateLeft64(v7, -63)
+
+			v0 += m[s[8]]
+			v0 += v5
+			v15 ^= v0
+			v15 = bits.RotateLeft64(v15, -32)
+			v10 += v15
+			v5 ^= v10
+			v5 = bits.RotateLeft64(v5, -24)
+			v1 += m[s[9]]
+			v1 += v6
+			v12 ^= v1
+			v12 = bits.RotateLeft64(v12, -32)
+			v11 += v12
+			v6 ^= v11
+			v6 = bits.RotateLeft64(v6, -24)
+			v2 += m[s[10]]
+			v2 += v7
+			v13 ^= v2
+			v13 = bits.RotateLeft64(v13, -32)
+			v8 += v13
+			v7 ^= v8
+			v7 = bits.RotateLeft64(v7, -24)
+			v3 += m[s[11]]
+			v3 += v4
+			v14 ^= v3
+			v14 = bits.RotateLeft64(v14, -32)
+			v9 += v14
+			v4 ^= v9
+			v4 = bits.RotateLeft64(v4, -24)
+
+			v0 += m[s[12]]
+			v0 += v5
+			v15 ^= v0
+			v15 = bits.RotateLeft64(v15, -16)
+			v10 += v15
+			v5 ^= v10
+			v5 = bits.RotateLeft64(v5, -63)
+			v1 += m[s[13]]
+			v1 += v6
+			v12 ^= v1
+			v12 = bits.RotateLeft64(v12, -16)
+			v11 += v12
+			v6 ^= v11
+			v6 = bits.RotateLeft64(v6, -63)
+			v2 += m[s[14]]
+			v2 += v7
+			v13 ^= v2
+			v13 = bits.RotateLeft64(v13, -16)
+			v8 += v13
+			v7 ^= v8
+			v7 = bits.RotateLeft64(v7, -63)
+			v3 += m[s[15]]
+			v3 += v4
+			v14 ^= v3
+			v14 = bits.RotateLeft64(v14, -16)
+			v9 += v14
+			v4 ^= v9
+			v4 = bits.RotateLeft64(v4, -63)
+
+		}
+
+		h[0] ^= v0 ^ v8
+		h[1] ^= v1 ^ v9
+		h[2] ^= v2 ^ v10
+		h[3] ^= v3 ^ v11
+		h[4] ^= v4 ^ v12
+		h[5] ^= v5 ^ v13
+		h[6] ^= v6 ^ v14
+		h[7] ^= v7 ^ v15
+	}
+	c[0], c[1] = c0, c1
+}

vendor/golang.org/x/crypto/blake2b/blake2b_ref.go

@@ -0,0 +1,12 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !amd64 || purego || !gc
+// +build !amd64 purego !gc
+
+package blake2b
+
+func hashBlocks(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte) {
+	hashBlocksGeneric(h, c, flag, blocks)
+}

vendor/golang.org/x/crypto/blake2b/blake2x.go

@@ -0,0 +1,177 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package blake2b
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+)
+
+// XOF defines the interface to hash functions that
+// support arbitrary-length output.
+type XOF interface {
+	// Write absorbs more data into the hash's state. It panics if called
+	// after Read.
+	io.Writer
+
+	// Read reads more output from the hash. It returns io.EOF if the limit
+	// has been reached.
+	io.Reader
+
+	// Clone returns a copy of the XOF in its current state.
+	Clone() XOF
+
+	// Reset resets the XOF to its initial state.
+	Reset()
+}
+
+// OutputLengthUnknown can be used as the size argument to NewXOF to indicate
+// the length of the output is not known in advance.
+const OutputLengthUnknown = 0
+
+// magicUnknownOutputLength is a magic value for the output size that indicates
+// an unknown number of output bytes.
+const magicUnknownOutputLength = (1 << 32) - 1
+
+// maxOutputLength is the absolute maximum number of bytes to produce when the
+// number of output bytes is unknown.
+const maxOutputLength = (1 << 32) * 64
+
+// NewXOF creates a new variable-output-length hash. The hash either produce a
+// known number of bytes (1 <= size < 2**32-1), or an unknown number of bytes
+// (size == OutputLengthUnknown). In the latter case, an absolute limit of
+// 256GiB applies.
+//
+// A non-nil key turns the hash into a MAC. The key must between
+// zero and 32 bytes long.
+func NewXOF(size uint32, key []byte) (XOF, error) {
+	if len(key) > Size {
+		return nil, errKeySize
+	}
+	if size == magicUnknownOutputLength {
+		// 2^32-1 indicates an unknown number of bytes and thus isn't a
+		// valid length.
+		return nil, errors.New("blake2b: XOF length too large")
+	}
+	if size == OutputLengthUnknown {
+		size = magicUnknownOutputLength
+	}
+	x := &xof{
+		d: digest{
+			size:   Size,
+			keyLen: len(key),
+		},
+		length: size,
+	}
+	copy(x.d.key[:], key)
+	x.Reset()
+	return x, nil
+}
+
+type xof struct {
+	d                digest
+	length           uint32
+	remaining        uint64
+	cfg, root, block [Size]byte
+	offset           int
+	nodeOffset       uint32
+	readMode         bool
+}
+
+func (x *xof) Write(p []byte) (n int, err error) {
+	if x.readMode {
+		panic("blake2b: write to XOF after read")
+	}
+	return x.d.Write(p)
+}
+
+func (x *xof) Clone() XOF {
+	clone := *x
+	return &clone
+}
+
+func (x *xof) Reset() {
+	x.cfg[0] = byte(Size)
+	binary.LittleEndian.PutUint32(x.cfg[4:], uint32(Size)) // leaf length
+	binary.LittleEndian.PutUint32(x.cfg[12:], x.length)    // XOF length
+	x.cfg[17] = byte(Size)                                 // inner hash size
+
+	x.d.Reset()
+	x.d.h[1] ^= uint64(x.length) << 32
+
+	x.remaining = uint64(x.length)
+	if x.remaining == magicUnknownOutputLength {
+		x.remaining = maxOutputLength
+	}
+	x.offset, x.nodeOffset = 0, 0
+	x.readMode = false
+}
+
+func (x *xof) Read(p []byte) (n int, err error) {
+	if !x.readMode {
+		x.d.finalize(&x.root)
+		x.readMode = true
+	}
+
+	if x.remaining == 0 {
+		return 0, io.EOF
+	}
+
+	n = len(p)
+	if uint64(n) > x.remaining {
+		n = int(x.remaining)
+		p = p[:n]
+	}
+
+	if x.offset > 0 {
+		blockRemaining := Size - x.offset
+		if n < blockRemaining {
+			x.offset += copy(p, x.block[x.offset:])
+			x.remaining -= uint64(n)
+			return
+		}
+		copy(p, x.block[x.offset:])
+		p = p[blockRemaining:]
+		x.offset = 0
+		x.remaining -= uint64(blockRemaining)
+	}
+
+	for len(p) >= Size {
+		binary.LittleEndian.PutUint32(x.cfg[8:], x.nodeOffset)
+		x.nodeOffset++
+
+		x.d.initConfig(&x.cfg)
+		x.d.Write(x.root[:])
+		x.d.finalize(&x.block)
+
+		copy(p, x.block[:])
+		p = p[Size:]
+		x.remaining -= uint64(Size)
+	}
+
+	if todo := len(p); todo > 0 {
+		if x.remaining < uint64(Size) {
+			x.cfg[0] = byte(x.remaining)
+		}
+		binary.LittleEndian.PutUint32(x.cfg[8:], x.nodeOffset)
+		x.nodeOffset++
+
+		x.d.initConfig(&x.cfg)
+		x.d.Write(x.root[:])
+		x.d.finalize(&x.block)
+
+		x.offset = copy(p, x.block[:todo])
+		x.remaining -= uint64(todo)
+	}
+	return
+}
+
+func (d *digest) initConfig(cfg *[Size]byte) {
+	d.offset, d.c[0], d.c[1] = 0, 0, 0
+	for i := range d.h {
+		d.h[i] = iv[i] ^ binary.LittleEndian.Uint64(cfg[i*8:])
+	}
+}

vendor/golang.org/x/crypto/blake2b/register.go

@@ -0,0 +1,33 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.9
+// +build go1.9
+
+package blake2b
+
+import (
+	"crypto"
+	"hash"
+)
+
+func init() {
+	newHash256 := func() hash.Hash {
+		h, _ := New256(nil)
+		return h
+	}
+	newHash384 := func() hash.Hash {
+		h, _ := New384(nil)
+		return h
+	}
+
+	newHash512 := func() hash.Hash {
+		h, _ := New512(nil)
+		return h
+	}
+
+	crypto.RegisterHash(crypto.BLAKE2b_256, newHash256)
+	crypto.RegisterHash(crypto.BLAKE2b_384, newHash384)
+	crypto.RegisterHash(crypto.BLAKE2b_512, newHash512)
+}

vendor/golang.org/x/crypto/ripemd160/ripemd160.go

@@ -0,0 +1,124 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ripemd160 implements the RIPEMD-160 hash algorithm.
+//
+// Deprecated: RIPEMD-160 is a legacy hash and should not be used for new
+// applications. Also, this package does not and will not provide an optimized
+// implementation. Instead, use a modern hash like SHA-256 (from crypto/sha256).
+package ripemd160 // import "golang.org/x/crypto/ripemd160"
+
+// RIPEMD-160 is designed by Hans Dobbertin, Antoon Bosselaers, and Bart
+// Preneel with specifications available at:
+// http://homes.esat.kuleuven.be/~cosicart/pdf/AB-9601/AB-9601.pdf.
+
+import (
+	"crypto"
+	"hash"
+)
+
+func init() {
+	crypto.RegisterHash(crypto.RIPEMD160, New)
+}
+
+// The size of the checksum in bytes.
+const Size = 20
+
+// The block size of the hash algorithm in bytes.
+const BlockSize = 64
+
+const (
+	_s0 = 0x67452301
+	_s1 = 0xefcdab89
+	_s2 = 0x98badcfe
+	_s3 = 0x10325476
+	_s4 = 0xc3d2e1f0
+)
+
+// digest represents the partial evaluation of a checksum.
+type digest struct {
+	s  [5]uint32       // running context
+	x  [BlockSize]byte // temporary buffer
+	nx int             // index into x
+	tc uint64          // total count of bytes processed
+}
+
+func (d *digest) Reset() {
+	d.s[0], d.s[1], d.s[2], d.s[3], d.s[4] = _s0, _s1, _s2, _s3, _s4
+	d.nx = 0
+	d.tc = 0
+}
+
+// New returns a new hash.Hash computing the checksum.
+func New() hash.Hash {
+	result := new(digest)
+	result.Reset()
+	return result
+}
+
+func (d *digest) Size() int { return Size }
+
+func (d *digest) BlockSize() int { return BlockSize }
+
+func (d *digest) Write(p []byte) (nn int, err error) {
+	nn = len(p)
+	d.tc += uint64(nn)
+	if d.nx > 0 {
+		n := len(p)
+		if n > BlockSize-d.nx {
+			n = BlockSize - d.nx
+		}
+		for i := 0; i < n; i++ {
+			d.x[d.nx+i] = p[i]
+		}
+		d.nx += n
+		if d.nx == BlockSize {
+			_Block(d, d.x[0:])
+			d.nx = 0
+		}
+		p = p[n:]
+	}
+	n := _Block(d, p)
+	p = p[n:]
+	if len(p) > 0 {
+		d.nx = copy(d.x[:], p)
+	}
+	return
+}
+
+func (d0 *digest) Sum(in []byte) []byte {
+	// Make a copy of d0 so that caller can keep writing and summing.
+	d := *d0
+
+	// Padding.  Add a 1 bit and 0 bits until 56 bytes mod 64.
+	tc := d.tc
+	var tmp [64]byte
+	tmp[0] = 0x80
+	if tc%64 < 56 {
+		d.Write(tmp[0 : 56-tc%64])
+	} else {
+		d.Write(tmp[0 : 64+56-tc%64])
+	}
+
+	// Length in bits.
+	tc <<= 3
+	for i := uint(0); i < 8; i++ {
+		tmp[i] = byte(tc >> (8 * i))
+	}
+	d.Write(tmp[0:8])
+
+	if d.nx != 0 {
+		panic("d.nx != 0")
+	}
+
+	var digest [Size]byte
+	for i, s := range d.s {
+		digest[i*4] = byte(s)
+		digest[i*4+1] = byte(s >> 8)
+		digest[i*4+2] = byte(s >> 16)
+		digest[i*4+3] = byte(s >> 24)
+	}
+
+	return append(in, digest[:]...)
+}

vendor/golang.org/x/crypto/ripemd160/ripemd160block.go

@@ -0,0 +1,165 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// RIPEMD-160 block step.
+// In its own file so that a faster assembly or C version
+// can be substituted easily.
+
+package ripemd160
+
+import (
+	"math/bits"
+)
+
+// work buffer indices and roll amounts for one line
+var _n = [80]uint{
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+	7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
+	3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
+	1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
+	4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
+}
+
+var _r = [80]uint{
+	11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
+	7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
+	11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
+	11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
+	9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
+}
+
+// same for the other parallel one
+var n_ = [80]uint{
+	5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
+	6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
+	15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
+	8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
+	12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
+}
+
+var r_ = [80]uint{
+	8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
+	9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
+	9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
+	15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
+	8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
+}
+
+func _Block(md *digest, p []byte) int {
+	n := 0
+	var x [16]uint32
+	var alpha, beta uint32
+	for len(p) >= BlockSize {
+		a, b, c, d, e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4]
+		aa, bb, cc, dd, ee := a, b, c, d, e
+		j := 0
+		for i := 0; i < 16; i++ {
+			x[i] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24
+			j += 4
+		}
+
+		// round 1
+		i := 0
+		for i < 16 {
+			alpha = a + (b ^ c ^ d) + x[_n[i]]
+			s := int(_r[i])
+			alpha = bits.RotateLeft32(alpha, s) + e
+			beta = bits.RotateLeft32(c, 10)
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb ^ (cc | ^dd)) + x[n_[i]] + 0x50a28be6
+			s = int(r_[i])
+			alpha = bits.RotateLeft32(alpha, s) + ee
+			beta = bits.RotateLeft32(cc, 10)
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 2
+		for i < 32 {
+			alpha = a + (b&c | ^b&d) + x[_n[i]] + 0x5a827999
+			s := int(_r[i])
+			alpha = bits.RotateLeft32(alpha, s) + e
+			beta = bits.RotateLeft32(c, 10)
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb&dd | cc&^dd) + x[n_[i]] + 0x5c4dd124
+			s = int(r_[i])
+			alpha = bits.RotateLeft32(alpha, s) + ee
+			beta = bits.RotateLeft32(cc, 10)
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 3
+		for i < 48 {
+			alpha = a + (b | ^c ^ d) + x[_n[i]] + 0x6ed9eba1
+			s := int(_r[i])
+			alpha = bits.RotateLeft32(alpha, s) + e
+			beta = bits.RotateLeft32(c, 10)
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb | ^cc ^ dd) + x[n_[i]] + 0x6d703ef3
+			s = int(r_[i])
+			alpha = bits.RotateLeft32(alpha, s) + ee
+			beta = bits.RotateLeft32(cc, 10)
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 4
+		for i < 64 {
+			alpha = a + (b&d | c&^d) + x[_n[i]] + 0x8f1bbcdc
+			s := int(_r[i])
+			alpha = bits.RotateLeft32(alpha, s) + e
+			beta = bits.RotateLeft32(c, 10)
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb&cc | ^bb&dd) + x[n_[i]] + 0x7a6d76e9
+			s = int(r_[i])
+			alpha = bits.RotateLeft32(alpha, s) + ee
+			beta = bits.RotateLeft32(cc, 10)
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 5
+		for i < 80 {
+			alpha = a + (b ^ (c | ^d)) + x[_n[i]] + 0xa953fd4e
+			s := int(_r[i])
+			alpha = bits.RotateLeft32(alpha, s) + e
+			beta = bits.RotateLeft32(c, 10)
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb ^ cc ^ dd) + x[n_[i]]
+			s = int(r_[i])
+			alpha = bits.RotateLeft32(alpha, s) + ee
+			beta = bits.RotateLeft32(cc, 10)
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// combine results
+		dd += c + md.s[1]
+		md.s[1] = md.s[2] + d + ee
+		md.s[2] = md.s[3] + e + aa
+		md.s[3] = md.s[4] + a + bb
+		md.s[4] = md.s[0] + b + cc
+		md.s[0] = dd
+
+		p = p[BlockSize:]
+		n += BlockSize
+	}
+	return n
+}

vendor/golang.org/x/crypto/twofish/twofish.go

@@ -0,0 +1,341 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package twofish implements Bruce Schneier's Twofish encryption algorithm.
+//
+// Deprecated: Twofish is a legacy cipher and should not be used for new
+// applications. Also, this package does not and will not provide an optimized
+// implementation. Instead, use AES (from crypto/aes, if necessary in an AEAD
+// mode like crypto/cipher.NewGCM) or XChaCha20-Poly1305 (from
+// golang.org/x/crypto/chacha20poly1305).
+package twofish // import "golang.org/x/crypto/twofish"
+
+// Twofish is defined in https://www.schneier.com/paper-twofish-paper.pdf [TWOFISH]
+
+// This code is a port of the LibTom C implementation.
+// See http://libtom.org/?page=features&newsitems=5&whatfile=crypt.
+// LibTomCrypt is free for all purposes under the public domain.
+// It was heavily inspired by the go blowfish package.
+
+import (
+	"math/bits"
+	"strconv"
+)
+
+// BlockSize is the constant block size of Twofish.
+const BlockSize = 16
+
+const mdsPolynomial = 0x169 // x^8 + x^6 + x^5 + x^3 + 1, see [TWOFISH] 4.2
+const rsPolynomial = 0x14d  // x^8 + x^6 + x^3 + x^2 + 1, see [TWOFISH] 4.3
+
+// A Cipher is an instance of Twofish encryption using a particular key.
+type Cipher struct {
+	s [4][256]uint32
+	k [40]uint32
+}
+
+type KeySizeError int
+
+func (k KeySizeError) Error() string {
+	return "crypto/twofish: invalid key size " + strconv.Itoa(int(k))
+}
+
+// NewCipher creates and returns a Cipher.
+// The key argument should be the Twofish key, 16, 24 or 32 bytes.
+func NewCipher(key []byte) (*Cipher, error) {
+	keylen := len(key)
+
+	if keylen != 16 && keylen != 24 && keylen != 32 {
+		return nil, KeySizeError(keylen)
+	}
+
+	// k is the number of 64 bit words in key
+	k := keylen / 8
+
+	// Create the S[..] words
+	var S [4 * 4]byte
+	for i := 0; i < k; i++ {
+		// Computes [y0 y1 y2 y3] = rs . [x0 x1 x2 x3 x4 x5 x6 x7]
+		for j, rsRow := range rs {
+			for k, rsVal := range rsRow {
+				S[4*i+j] ^= gfMult(key[8*i+k], rsVal, rsPolynomial)
+			}
+		}
+	}
+
+	// Calculate subkeys
+	c := new(Cipher)
+	var tmp [4]byte
+	for i := byte(0); i < 20; i++ {
+		// A = h(p * 2x, Me)
+		for j := range tmp {
+			tmp[j] = 2 * i
+		}
+		A := h(tmp[:], key, 0)
+
+		// B = rolc(h(p * (2x + 1), Mo), 8)
+		for j := range tmp {
+			tmp[j] = 2*i + 1
+		}
+		B := h(tmp[:], key, 1)
+		B = bits.RotateLeft32(B, 8)
+
+		c.k[2*i] = A + B
+
+		// K[2i+1] = (A + 2B) <<< 9
+		c.k[2*i+1] = bits.RotateLeft32(2*B+A, 9)
+	}
+
+	// Calculate sboxes
+	switch k {
+	case 2:
+		for i := range c.s[0] {
+			c.s[0][i] = mdsColumnMult(sbox[1][sbox[0][sbox[0][byte(i)]^S[0]]^S[4]], 0)
+			c.s[1][i] = mdsColumnMult(sbox[0][sbox[0][sbox[1][byte(i)]^S[1]]^S[5]], 1)
+			c.s[2][i] = mdsColumnMult(sbox[1][sbox[1][sbox[0][byte(i)]^S[2]]^S[6]], 2)
+			c.s[3][i] = mdsColumnMult(sbox[0][sbox[1][sbox[1][byte(i)]^S[3]]^S[7]], 3)
+		}
+	case 3:
+		for i := range c.s[0] {
+			c.s[0][i] = mdsColumnMult(sbox[1][sbox[0][sbox[0][sbox[1][byte(i)]^S[0]]^S[4]]^S[8]], 0)
+			c.s[1][i] = mdsColumnMult(sbox[0][sbox[0][sbox[1][sbox[1][byte(i)]^S[1]]^S[5]]^S[9]], 1)
+			c.s[2][i] = mdsColumnMult(sbox[1][sbox[1][sbox[0][sbox[0][byte(i)]^S[2]]^S[6]]^S[10]], 2)
+			c.s[3][i] = mdsColumnMult(sbox[0][sbox[1][sbox[1][sbox[0][byte(i)]^S[3]]^S[7]]^S[11]], 3)
+		}
+	default:
+		for i := range c.s[0] {
+			c.s[0][i] = mdsColumnMult(sbox[1][sbox[0][sbox[0][sbox[1][sbox[1][byte(i)]^S[0]]^S[4]]^S[8]]^S[12]], 0)
+			c.s[1][i] = mdsColumnMult(sbox[0][sbox[0][sbox[1][sbox[1][sbox[0][byte(i)]^S[1]]^S[5]]^S[9]]^S[13]], 1)
+			c.s[2][i] = mdsColumnMult(sbox[1][sbox[1][sbox[0][sbox[0][sbox[0][byte(i)]^S[2]]^S[6]]^S[10]]^S[14]], 2)
+			c.s[3][i] = mdsColumnMult(sbox[0][sbox[1][sbox[1][sbox[0][sbox[1][byte(i)]^S[3]]^S[7]]^S[11]]^S[15]], 3)
+		}
+	}
+
+	return c, nil
+}
+
+// BlockSize returns the Twofish block size, 16 bytes.
+func (c *Cipher) BlockSize() int { return BlockSize }
+
+// store32l stores src in dst in little-endian form.
+func store32l(dst []byte, src uint32) {
+	dst[0] = byte(src)
+	dst[1] = byte(src >> 8)
+	dst[2] = byte(src >> 16)
+	dst[3] = byte(src >> 24)
+	return
+}
+
+// load32l reads a little-endian uint32 from src.
+func load32l(src []byte) uint32 {
+	return uint32(src[0]) | uint32(src[1])<<8 | uint32(src[2])<<16 | uint32(src[3])<<24
+}
+
+// The RS matrix. See [TWOFISH] 4.3
+var rs = [4][8]byte{
+	{0x01, 0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E},
+	{0xA4, 0x56, 0x82, 0xF3, 0x1E, 0xC6, 0x68, 0xE5},
+	{0x02, 0xA1, 0xFC, 0xC1, 0x47, 0xAE, 0x3D, 0x19},
+	{0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E, 0x03},
+}
+
+// sbox tables
+var sbox = [2][256]byte{
+	{
+		0xa9, 0x67, 0xb3, 0xe8, 0x04, 0xfd, 0xa3, 0x76, 0x9a, 0x92, 0x80, 0x78, 0xe4, 0xdd, 0xd1, 0x38,
+		0x0d, 0xc6, 0x35, 0x98, 0x18, 0xf7, 0xec, 0x6c, 0x43, 0x75, 0x37, 0x26, 0xfa, 0x13, 0x94, 0x48,
+		0xf2, 0xd0, 0x8b, 0x30, 0x84, 0x54, 0xdf, 0x23, 0x19, 0x5b, 0x3d, 0x59, 0xf3, 0xae, 0xa2, 0x82,
+		0x63, 0x01, 0x83, 0x2e, 0xd9, 0x51, 0x9b, 0x7c, 0xa6, 0xeb, 0xa5, 0xbe, 0x16, 0x0c, 0xe3, 0x61,
+		0xc0, 0x8c, 0x3a, 0xf5, 0x73, 0x2c, 0x25, 0x0b, 0xbb, 0x4e, 0x89, 0x6b, 0x53, 0x6a, 0xb4, 0xf1,
+		0xe1, 0xe6, 0xbd, 0x45, 0xe2, 0xf4, 0xb6, 0x66, 0xcc, 0x95, 0x03, 0x56, 0xd4, 0x1c, 0x1e, 0xd7,
+		0xfb, 0xc3, 0x8e, 0xb5, 0xe9, 0xcf, 0xbf, 0xba, 0xea, 0x77, 0x39, 0xaf, 0x33, 0xc9, 0x62, 0x71,
+		0x81, 0x79, 0x09, 0xad, 0x24, 0xcd, 0xf9, 0xd8, 0xe5, 0xc5, 0xb9, 0x4d, 0x44, 0x08, 0x86, 0xe7,
+		0xa1, 0x1d, 0xaa, 0xed, 0x06, 0x70, 0xb2, 0xd2, 0x41, 0x7b, 0xa0, 0x11, 0x31, 0xc2, 0x27, 0x90,
+		0x20, 0xf6, 0x60, 0xff, 0x96, 0x5c, 0xb1, 0xab, 0x9e, 0x9c, 0x52, 0x1b, 0x5f, 0x93, 0x0a, 0xef,
+		0x91, 0x85, 0x49, 0xee, 0x2d, 0x4f, 0x8f, 0x3b, 0x47, 0x87, 0x6d, 0x46, 0xd6, 0x3e, 0x69, 0x64,
+		0x2a, 0xce, 0xcb, 0x2f, 0xfc, 0x97, 0x05, 0x7a, 0xac, 0x7f, 0xd5, 0x1a, 0x4b, 0x0e, 0xa7, 0x5a,
+		0x28, 0x14, 0x3f, 0x29, 0x88, 0x3c, 0x4c, 0x02, 0xb8, 0xda, 0xb0, 0x17, 0x55, 0x1f, 0x8a, 0x7d,
+		0x57, 0xc7, 0x8d, 0x74, 0xb7, 0xc4, 0x9f, 0x72, 0x7e, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34,
+		0x6e, 0x50, 0xde, 0x68, 0x65, 0xbc, 0xdb, 0xf8, 0xc8, 0xa8, 0x2b, 0x40, 0xdc, 0xfe, 0x32, 0xa4,
+		0xca, 0x10, 0x21, 0xf0, 0xd3, 0x5d, 0x0f, 0x00, 0x6f, 0x9d, 0x36, 0x42, 0x4a, 0x5e, 0xc1, 0xe0,
+	},
+	{
+		0x75, 0xf3, 0xc6, 0xf4, 0xdb, 0x7b, 0xfb, 0xc8, 0x4a, 0xd3, 0xe6, 0x6b, 0x45, 0x7d, 0xe8, 0x4b,
+		0xd6, 0x32, 0xd8, 0xfd, 0x37, 0x71, 0xf1, 0xe1, 0x30, 0x0f, 0xf8, 0x1b, 0x87, 0xfa, 0x06, 0x3f,
+		0x5e, 0xba, 0xae, 0x5b, 0x8a, 0x00, 0xbc, 0x9d, 0x6d, 0xc1, 0xb1, 0x0e, 0x80, 0x5d, 0xd2, 0xd5,
+		0xa0, 0x84, 0x07, 0x14, 0xb5, 0x90, 0x2c, 0xa3, 0xb2, 0x73, 0x4c, 0x54, 0x92, 0x74, 0x36, 0x51,
+		0x38, 0xb0, 0xbd, 0x5a, 0xfc, 0x60, 0x62, 0x96, 0x6c, 0x42, 0xf7, 0x10, 0x7c, 0x28, 0x27, 0x8c,
+		0x13, 0x95, 0x9c, 0xc7, 0x24, 0x46, 0x3b, 0x70, 0xca, 0xe3, 0x85, 0xcb, 0x11, 0xd0, 0x93, 0xb8,
+		0xa6, 0x83, 0x20, 0xff, 0x9f, 0x77, 0xc3, 0xcc, 0x03, 0x6f, 0x08, 0xbf, 0x40, 0xe7, 0x2b, 0xe2,
+		0x79, 0x0c, 0xaa, 0x82, 0x41, 0x3a, 0xea, 0xb9, 0xe4, 0x9a, 0xa4, 0x97, 0x7e, 0xda, 0x7a, 0x17,
+		0x66, 0x94, 0xa1, 0x1d, 0x3d, 0xf0, 0xde, 0xb3, 0x0b, 0x72, 0xa7, 0x1c, 0xef, 0xd1, 0x53, 0x3e,
+		0x8f, 0x33, 0x26, 0x5f, 0xec, 0x76, 0x2a, 0x49, 0x81, 0x88, 0xee, 0x21, 0xc4, 0x1a, 0xeb, 0xd9,
+		0xc5, 0x39, 0x99, 0xcd, 0xad, 0x31, 0x8b, 0x01, 0x18, 0x23, 0xdd, 0x1f, 0x4e, 0x2d, 0xf9, 0x48,
+		0x4f, 0xf2, 0x65, 0x8e, 0x78, 0x5c, 0x58, 0x19, 0x8d, 0xe5, 0x98, 0x57, 0x67, 0x7f, 0x05, 0x64,
+		0xaf, 0x63, 0xb6, 0xfe, 0xf5, 0xb7, 0x3c, 0xa5, 0xce, 0xe9, 0x68, 0x44, 0xe0, 0x4d, 0x43, 0x69,
+		0x29, 0x2e, 0xac, 0x15, 0x59, 0xa8, 0x0a, 0x9e, 0x6e, 0x47, 0xdf, 0x34, 0x35, 0x6a, 0xcf, 0xdc,
+		0x22, 0xc9, 0xc0, 0x9b, 0x89, 0xd4, 0xed, 0xab, 0x12, 0xa2, 0x0d, 0x52, 0xbb, 0x02, 0x2f, 0xa9,
+		0xd7, 0x61, 0x1e, 0xb4, 0x50, 0x04, 0xf6, 0xc2, 0x16, 0x25, 0x86, 0x56, 0x55, 0x09, 0xbe, 0x91,
+	},
+}
+
+// gfMult returns a·b in GF(2^8)/p
+func gfMult(a, b byte, p uint32) byte {
+	B := [2]uint32{0, uint32(b)}
+	P := [2]uint32{0, p}
+	var result uint32
+
+	// branchless GF multiplier
+	for i := 0; i < 7; i++ {
+		result ^= B[a&1]
+		a >>= 1
+		B[1] = P[B[1]>>7] ^ (B[1] << 1)
+	}
+	result ^= B[a&1]
+	return byte(result)
+}
+
+// mdsColumnMult calculates y{col} where [y0 y1 y2 y3] = MDS · [x0]
+func mdsColumnMult(in byte, col int) uint32 {
+	mul01 := in
+	mul5B := gfMult(in, 0x5B, mdsPolynomial)
+	mulEF := gfMult(in, 0xEF, mdsPolynomial)
+
+	switch col {
+	case 0:
+		return uint32(mul01) | uint32(mul5B)<<8 | uint32(mulEF)<<16 | uint32(mulEF)<<24
+	case 1:
+		return uint32(mulEF) | uint32(mulEF)<<8 | uint32(mul5B)<<16 | uint32(mul01)<<24
+	case 2:
+		return uint32(mul5B) | uint32(mulEF)<<8 | uint32(mul01)<<16 | uint32(mulEF)<<24
+	case 3:
+		return uint32(mul5B) | uint32(mul01)<<8 | uint32(mulEF)<<16 | uint32(mul5B)<<24
+	}
+
+	panic("unreachable")
+}
+
+// h implements the S-box generation function. See [TWOFISH] 4.3.5
+func h(in, key []byte, offset int) uint32 {
+	var y [4]byte
+	for x := range y {
+		y[x] = in[x]
+	}
+	switch len(key) / 8 {
+	case 4:
+		y[0] = sbox[1][y[0]] ^ key[4*(6+offset)+0]
+		y[1] = sbox[0][y[1]] ^ key[4*(6+offset)+1]
+		y[2] = sbox[0][y[2]] ^ key[4*(6+offset)+2]
+		y[3] = sbox[1][y[3]] ^ key[4*(6+offset)+3]
+		fallthrough
+	case 3:
+		y[0] = sbox[1][y[0]] ^ key[4*(4+offset)+0]
+		y[1] = sbox[1][y[1]] ^ key[4*(4+offset)+1]
+		y[2] = sbox[0][y[2]] ^ key[4*(4+offset)+2]
+		y[3] = sbox[0][y[3]] ^ key[4*(4+offset)+3]
+		fallthrough
+	case 2:
+		y[0] = sbox[1][sbox[0][sbox[0][y[0]]^key[4*(2+offset)+0]]^key[4*(0+offset)+0]]
+		y[1] = sbox[0][sbox[0][sbox[1][y[1]]^key[4*(2+offset)+1]]^key[4*(0+offset)+1]]
+		y[2] = sbox[1][sbox[1][sbox[0][y[2]]^key[4*(2+offset)+2]]^key[4*(0+offset)+2]]
+		y[3] = sbox[0][sbox[1][sbox[1][y[3]]^key[4*(2+offset)+3]]^key[4*(0+offset)+3]]
+	}
+	// [y0 y1 y2 y3] = MDS . [x0 x1 x2 x3]
+	var mdsMult uint32
+	for i := range y {
+		mdsMult ^= mdsColumnMult(y[i], i)
+	}
+	return mdsMult
+}
+
+// Encrypt encrypts a 16-byte block from src to dst, which may overlap.
+// Note that for amounts of data larger than a block,
+// it is not safe to just call Encrypt on successive blocks;
+// instead, use an encryption mode like CBC (see crypto/cipher/cbc.go).
+func (c *Cipher) Encrypt(dst, src []byte) {
+	S1 := c.s[0]
+	S2 := c.s[1]
+	S3 := c.s[2]
+	S4 := c.s[3]
+
+	// Load input
+	ia := load32l(src[0:4])
+	ib := load32l(src[4:8])
+	ic := load32l(src[8:12])
+	id := load32l(src[12:16])
+
+	// Pre-whitening
+	ia ^= c.k[0]
+	ib ^= c.k[1]
+	ic ^= c.k[2]
+	id ^= c.k[3]
+
+	for i := 0; i < 8; i++ {
+		k := c.k[8+i*4 : 12+i*4]
+		t2 := S2[byte(ib)] ^ S3[byte(ib>>8)] ^ S4[byte(ib>>16)] ^ S1[byte(ib>>24)]
+		t1 := S1[byte(ia)] ^ S2[byte(ia>>8)] ^ S3[byte(ia>>16)] ^ S4[byte(ia>>24)] + t2
+		ic = bits.RotateLeft32(ic^(t1+k[0]), -1)
+		id = bits.RotateLeft32(id, 1) ^ (t2 + t1 + k[1])
+
+		t2 = S2[byte(id)] ^ S3[byte(id>>8)] ^ S4[byte(id>>16)] ^ S1[byte(id>>24)]
+		t1 = S1[byte(ic)] ^ S2[byte(ic>>8)] ^ S3[byte(ic>>16)] ^ S4[byte(ic>>24)] + t2
+		ia = bits.RotateLeft32(ia^(t1+k[2]), -1)
+		ib = bits.RotateLeft32(ib, 1) ^ (t2 + t1 + k[3])
+	}
+
+	// Output with "undo last swap"
+	ta := ic ^ c.k[4]
+	tb := id ^ c.k[5]
+	tc := ia ^ c.k[6]
+	td := ib ^ c.k[7]
+
+	store32l(dst[0:4], ta)
+	store32l(dst[4:8], tb)
+	store32l(dst[8:12], tc)
+	store32l(dst[12:16], td)
+}
+
+// Decrypt decrypts a 16-byte block from src to dst, which may overlap.
+func (c *Cipher) Decrypt(dst, src []byte) {
+	S1 := c.s[0]
+	S2 := c.s[1]
+	S3 := c.s[2]
+	S4 := c.s[3]
+
+	// Load input
+	ta := load32l(src[0:4])
+	tb := load32l(src[4:8])
+	tc := load32l(src[8:12])
+	td := load32l(src[12:16])
+
+	// Undo undo final swap
+	ia := tc ^ c.k[6]
+	ib := td ^ c.k[7]
+	ic := ta ^ c.k[4]
+	id := tb ^ c.k[5]
+
+	for i := 8; i > 0; i-- {
+		k := c.k[4+i*4 : 8+i*4]
+		t2 := S2[byte(id)] ^ S3[byte(id>>8)] ^ S4[byte(id>>16)] ^ S1[byte(id>>24)]
+		t1 := S1[byte(ic)] ^ S2[byte(ic>>8)] ^ S3[byte(ic>>16)] ^ S4[byte(ic>>24)] + t2
+		ia = bits.RotateLeft32(ia, 1) ^ (t1 + k[2])
+		ib = bits.RotateLeft32(ib^(t2+t1+k[3]), -1)
+
+		t2 = S2[byte(ib)] ^ S3[byte(ib>>8)] ^ S4[byte(ib>>16)] ^ S1[byte(ib>>24)]
+		t1 = S1[byte(ia)] ^ S2[byte(ia>>8)] ^ S3[byte(ia>>16)] ^ S4[byte(ia>>24)] + t2
+		ic = bits.RotateLeft32(ic, 1) ^ (t1 + k[0])
+		id = bits.RotateLeft32(id^(t2+t1+k[1]), -1)
+	}
+
+	// Undo pre-whitening
+	ia ^= c.k[0]
+	ib ^= c.k[1]
+	ic ^= c.k[2]
+	id ^= c.k[3]
+
+	store32l(dst[0:4], ia)
+	store32l(dst[4:8], ib)
+	store32l(dst[8:12], ic)
+	store32l(dst[12:16], id)
+}

vendor/golang.org/x/crypto/xts/xts.go

@@ -0,0 +1,164 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package xts implements the XTS cipher mode as specified in IEEE P1619/D16.
+//
+// XTS mode is typically used for disk encryption, which presents a number of
+// novel problems that make more common modes inapplicable. The disk is
+// conceptually an array of sectors and we must be able to encrypt and decrypt
+// a sector in isolation. However, an attacker must not be able to transpose
+// two sectors of plaintext by transposing their ciphertext.
+//
+// XTS wraps a block cipher with Rogaway's XEX mode in order to build a
+// tweakable block cipher. This allows each sector to have a unique tweak and
+// effectively create a unique key for each sector.
+//
+// XTS does not provide any authentication. An attacker can manipulate the
+// ciphertext and randomise a block (16 bytes) of the plaintext. This package
+// does not implement ciphertext-stealing so sectors must be a multiple of 16
+// bytes.
+//
+// Note that XTS is usually not appropriate for any use besides disk encryption.
+// Most users should use an AEAD mode like GCM (from crypto/cipher.NewGCM) instead.
+package xts // import "golang.org/x/crypto/xts"
+
+import (
+	"crypto/cipher"
+	"encoding/binary"
+	"errors"
+	"sync"
+
+	"golang.org/x/crypto/internal/alias"
+)
+
+// Cipher contains an expanded key structure. It is safe for concurrent use if
+// the underlying block cipher is safe for concurrent use.
+type Cipher struct {
+	k1, k2 cipher.Block
+}
+
+// blockSize is the block size that the underlying cipher must have. XTS is
+// only defined for 16-byte ciphers.
+const blockSize = 16
+
+var tweakPool = sync.Pool{
+	New: func() interface{} {
+		return new([blockSize]byte)
+	},
+}
+
+// NewCipher creates a Cipher given a function for creating the underlying
+// block cipher (which must have a block size of 16 bytes). The key must be
+// twice the length of the underlying cipher's key.
+func NewCipher(cipherFunc func([]byte) (cipher.Block, error), key []byte) (c *Cipher, err error) {
+	c = new(Cipher)
+	if c.k1, err = cipherFunc(key[:len(key)/2]); err != nil {
+		return
+	}
+	c.k2, err = cipherFunc(key[len(key)/2:])
+
+	if c.k1.BlockSize() != blockSize {
+		err = errors.New("xts: cipher does not have a block size of 16")
+	}
+
+	return
+}
+
+// Encrypt encrypts a sector of plaintext and puts the result into ciphertext.
+// Plaintext and ciphertext must overlap entirely or not at all.
+// Sectors must be a multiple of 16 bytes and less than 2²⁴ bytes.
+func (c *Cipher) Encrypt(ciphertext, plaintext []byte, sectorNum uint64) {
+	if len(ciphertext) < len(plaintext) {
+		panic("xts: ciphertext is smaller than plaintext")
+	}
+	if len(plaintext)%blockSize != 0 {
+		panic("xts: plaintext is not a multiple of the block size")
+	}
+	if alias.InexactOverlap(ciphertext[:len(plaintext)], plaintext) {
+		panic("xts: invalid buffer overlap")
+	}
+
+	tweak := tweakPool.Get().(*[blockSize]byte)
+	for i := range tweak {
+		tweak[i] = 0
+	}
+	binary.LittleEndian.PutUint64(tweak[:8], sectorNum)
+
+	c.k2.Encrypt(tweak[:], tweak[:])
+
+	for len(plaintext) > 0 {
+		for j := range tweak {
+			ciphertext[j] = plaintext[j] ^ tweak[j]
+		}
+		c.k1.Encrypt(ciphertext, ciphertext)
+		for j := range tweak {
+			ciphertext[j] ^= tweak[j]
+		}
+		plaintext = plaintext[blockSize:]
+		ciphertext = ciphertext[blockSize:]
+
+		mul2(tweak)
+	}
+
+	tweakPool.Put(tweak)
+}
+
+// Decrypt decrypts a sector of ciphertext and puts the result into plaintext.
+// Plaintext and ciphertext must overlap entirely or not at all.
+// Sectors must be a multiple of 16 bytes and less than 2²⁴ bytes.
+func (c *Cipher) Decrypt(plaintext, ciphertext []byte, sectorNum uint64) {
+	if len(plaintext) < len(ciphertext) {
+		panic("xts: plaintext is smaller than ciphertext")
+	}
+	if len(ciphertext)%blockSize != 0 {
+		panic("xts: ciphertext is not a multiple of the block size")
+	}
+	if alias.InexactOverlap(plaintext[:len(ciphertext)], ciphertext) {
+		panic("xts: invalid buffer overlap")
+	}
+
+	tweak := tweakPool.Get().(*[blockSize]byte)
+	for i := range tweak {
+		tweak[i] = 0
+	}
+	binary.LittleEndian.PutUint64(tweak[:8], sectorNum)
+
+	c.k2.Encrypt(tweak[:], tweak[:])
+
+	for len(ciphertext) > 0 {
+		for j := range tweak {
+			plaintext[j] = ciphertext[j] ^ tweak[j]
+		}
+		c.k1.Decrypt(plaintext, plaintext)
+		for j := range tweak {
+			plaintext[j] ^= tweak[j]
+		}
+		plaintext = plaintext[blockSize:]
+		ciphertext = ciphertext[blockSize:]
+
+		mul2(tweak)
+	}
+
+	tweakPool.Put(tweak)
+}
+
+// mul2 multiplies tweak by 2 in GF(2¹²⁸) with an irreducible polynomial of
+// x¹²⁸ + x⁷ + x² + x + 1.
+func mul2(tweak *[blockSize]byte) {
+	var carryIn byte
+	for j := range tweak {
+		carryOut := tweak[j] >> 7
+		tweak[j] = (tweak[j] << 1) + carryIn
+		carryIn = carryOut
+	}
+	if carryIn != 0 {
+		// If we have a carry bit then we need to subtract a multiple
+		// of the irreducible polynomial (x¹²⁸ + x⁷ + x² + x + 1).
+		// By dropping the carry bit, we're subtracting the x^128 term
+		// so all that remains is to subtract x⁷ + x² + x + 1.
+		// Subtraction (and addition) in this representation is just
+		// XOR.
+		tweak[0] ^= 1<<7 | 1<<2 | 1<<1 | 1
+	}
+}

vendor/modules.txt

@@ -51,6 +51,9 @@ github.com/VividCortex/ewma
 # github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d
 ## explicit
 github.com/acarl005/stripansi
+# github.com/aead/serpent v0.0.0-20160714141033-fba169763ea6
+## explicit
+github.com/aead/serpent
 # github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2
 ## explicit; go 1.13
 github.com/asaskevich/govalidator
@@ -201,6 +204,9 @@ github.com/containers/image/v5/version
 # github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01
 ## explicit
 github.com/containers/libtrust
+# github.com/containers/luksy v0.0.0-20230808154129-d2d74a56682f
+## explicit; go 1.20
+github.com/containers/luksy
 # github.com/containers/ocicrypt v1.1.8
 ## explicit; go 1.20
 github.com/containers/ocicrypt
@@ -689,7 +695,9 @@ go.opencensus.io/trace/internal
 go.opencensus.io/trace/tracestate
 # golang.org/x/crypto v0.13.0
 ## explicit; go 1.17
+golang.org/x/crypto/argon2
 golang.org/x/crypto/bcrypt
+golang.org/x/crypto/blake2b
 golang.org/x/crypto/blowfish
 golang.org/x/crypto/cast5
 golang.org/x/crypto/chacha20
@@ -707,12 +715,15 @@ golang.org/x/crypto/openpgp/errors
 golang.org/x/crypto/openpgp/packet
 golang.org/x/crypto/openpgp/s2k
 golang.org/x/crypto/pbkdf2
+golang.org/x/crypto/ripemd160
 golang.org/x/crypto/salsa20/salsa
 golang.org/x/crypto/scrypt
 golang.org/x/crypto/sha3
 golang.org/x/crypto/ssh
 golang.org/x/crypto/ssh/agent
 golang.org/x/crypto/ssh/internal/bcrypt_pbkdf
+golang.org/x/crypto/twofish
+golang.org/x/crypto/xts
 # golang.org/x/exp v0.0.0-20230801115018-d63ba01acd4b
 ## explicit; go 1.20
 golang.org/x/exp/constraints