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mc/cmd/certs.go

136 lines
3.4 KiB
Go

/*
* MinIO Client (C) 2016 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"crypto/x509"
"io/ioutil"
"os"
"path/filepath"
"github.com/minio/mc/pkg/probe"
)
// getCertsDir - return the full path of certs dir
func getCertsDir() (string, *probe.Error) {
p, err := getMcConfigDir()
if err != nil {
return "", err.Trace()
}
return filepath.Join(p, globalMCCertsDir), nil
}
// isCertsDirExists - verify if certs directory exists.
func isCertsDirExists() bool {
certsDir, err := getCertsDir()
fatalIf(err.Trace(), "Unable to determine certs folder.")
if _, e := os.Stat(certsDir); e != nil {
return false
}
return true
}
// createCertsDir - create MinIO Client certs folder
func createCertsDir() *probe.Error {
p, err := getCertsDir()
if err != nil {
return err.Trace()
}
if e := os.MkdirAll(p, 0700); e != nil {
return probe.NewError(e)
}
return nil
}
// getCAsDir - return the full path of CAs dir
func getCAsDir() (string, *probe.Error) {
p, err := getCertsDir()
if err != nil {
return "", err.Trace()
}
return filepath.Join(p, globalMCCAsDir), nil
}
// mustGetCAsDir - return the full path of CAs dir or empty string when an error occurs
func mustGetCAsDir() string {
p, err := getCAsDir()
if err != nil {
return ""
}
return p
}
// isCAsDirExists - verify if CAs directory exists.
func isCAsDirExists() bool {
CAsDir, err := getCAsDir()
fatalIf(err.Trace(), "Unable to determine CAs folder.")
if _, e := os.Stat(CAsDir); e != nil {
return false
}
return true
}
// createCAsDir - create MinIO Client CAs folder
func createCAsDir() *probe.Error {
p, err := getCAsDir()
if err != nil {
return err.Trace()
}
if e := os.MkdirAll(p, 0700); e != nil {
return probe.NewError(e)
}
return nil
}
// mustGetCAFiles - get the list of the CA certificates stored in MinIO config dir
func mustGetCAFiles() (caCerts []string) {
CAsDir := mustGetCAsDir()
caFiles, _ := ioutil.ReadDir(CAsDir)
for _, cert := range caFiles {
caCerts = append(caCerts, filepath.Join(CAsDir, cert.Name()))
}
return
}
// mustGetSystemCertPool - return system CAs or empty pool in case of error (or windows)
func mustGetSystemCertPool() *x509.CertPool {
pool, err := x509.SystemCertPool()
if err != nil {
return x509.NewCertPool()
}
return pool
}
// loadRootCAs fetches CA files provided in MinIO config and adds them to globalRootCAs
// Currently under Windows, there is no way to load system + user CAs at the same time
func loadRootCAs() {
caFiles := mustGetCAFiles()
if len(caFiles) == 0 {
return
}
// Get system cert pool, and empty cert pool under Windows because it is not supported
globalRootCAs = mustGetSystemCertPool()
// Load custom root CAs for client requests
for _, caFile := range caFiles {
caCert, err := ioutil.ReadFile(caFile)
if err != nil {
fatalIf(probe.NewError(err), "Unable to load a CA file.")
}
globalRootCAs.AppendCertsFromPEM(caCert)
}
}