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mbedtls/library/md.c
Gilles Peskine f08ca83b4f Update spelling "mbed TLS" to "Mbed TLS" 
The official spelling of the trade mark changed from all-lowercase "mbed"
to normal proper noun capitalization "Mbed" a few years ago. We've been
using the new spelling in new text but still have the old spelling in a
lot of text. This commit updates most occurrences of "mbed TLS":

```
sed -i -e 's/mbed TLS/Mbed TLS/g' $(git ls-files ':!ChangeLog' ':!tests/data_files/**' ':!tests/suites/*.data' ':!programs/x509/*' ':!configs/tfm*')
```

Justification for the omissions:

* `ChangeLog`: historical text.
* `test/data_files/**`, `tests/suites/*.data`, `programs/x509/*`: many
  occurrences are significant names in certificates and such. Changing
  the spelling would invalidate many signatures and tests.
* `configs/tfm*`: this is an imported file. We'll follow the upstream
  updates.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2023-09-12 19:21:54 +02:00

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/**
* \file md.c
*
* \brief Generic message digest wrapper for Mbed TLS
*
* \author Adriaan de Jong <dejong@fox-it.com>
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0
*
* 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.
*/
#include "common.h"
#if defined(MBEDTLS_MD_C)
#include "mbedtls/md.h"
#include "mbedtls/md_internal.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"
#include "mbedtls/md2.h"
#include "mbedtls/md4.h"
#include "mbedtls/md5.h"
#include "mbedtls/ripemd160.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"
#include "mbedtls/platform.h"
#include <string.h>
#if defined(MBEDTLS_FS_IO)
#include <stdio.h>
#endif
#if defined(MBEDTLS_MD2_C)
const mbedtls_md_info_t mbedtls_md2_info = {
"MD2",
MBEDTLS_MD_MD2,
16,
16,
};
#endif
#if defined(MBEDTLS_MD4_C)
const mbedtls_md_info_t mbedtls_md4_info = {
"MD4",
MBEDTLS_MD_MD4,
16,
64,
};
#endif
#if defined(MBEDTLS_MD5_C)
const mbedtls_md_info_t mbedtls_md5_info = {
"MD5",
MBEDTLS_MD_MD5,
16,
64,
};
#endif
#if defined(MBEDTLS_RIPEMD160_C)
const mbedtls_md_info_t mbedtls_ripemd160_info = {
"RIPEMD160",
MBEDTLS_MD_RIPEMD160,
20,
64,
};
#endif
#if defined(MBEDTLS_SHA1_C)
const mbedtls_md_info_t mbedtls_sha1_info = {
"SHA1",
MBEDTLS_MD_SHA1,
20,
64,
};
#endif
#if defined(MBEDTLS_SHA256_C)
const mbedtls_md_info_t mbedtls_sha224_info = {
"SHA224",
MBEDTLS_MD_SHA224,
28,
64,
};
const mbedtls_md_info_t mbedtls_sha256_info = {
"SHA256",
MBEDTLS_MD_SHA256,
32,
64,
};
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
const mbedtls_md_info_t mbedtls_sha384_info = {
"SHA384",
MBEDTLS_MD_SHA384,
48,
128,
};
#endif
const mbedtls_md_info_t mbedtls_sha512_info = {
"SHA512",
MBEDTLS_MD_SHA512,
64,
128,
};
#endif
/*
* Reminder: update profiles in x509_crt.c when adding a new hash!
*/
static const int supported_digests[] = {
#if defined(MBEDTLS_SHA512_C)
MBEDTLS_MD_SHA512,
#if !defined(MBEDTLS_SHA512_NO_SHA384)
MBEDTLS_MD_SHA384,
#endif
#endif
#if defined(MBEDTLS_SHA256_C)
MBEDTLS_MD_SHA256,
MBEDTLS_MD_SHA224,
#endif
#if defined(MBEDTLS_SHA1_C)
MBEDTLS_MD_SHA1,
#endif
#if defined(MBEDTLS_RIPEMD160_C)
MBEDTLS_MD_RIPEMD160,
#endif
#if defined(MBEDTLS_MD5_C)
MBEDTLS_MD_MD5,
#endif
#if defined(MBEDTLS_MD4_C)
MBEDTLS_MD_MD4,
#endif
#if defined(MBEDTLS_MD2_C)
MBEDTLS_MD_MD2,
#endif
MBEDTLS_MD_NONE
};
const int *mbedtls_md_list(void)
{
return supported_digests;
}
const mbedtls_md_info_t *mbedtls_md_info_from_string(const char *md_name)
{
if (NULL == md_name) {
return NULL;
}
/* Get the appropriate digest information */
#if defined(MBEDTLS_MD2_C)
if (!strcmp("MD2", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_MD2);
}
#endif
#if defined(MBEDTLS_MD4_C)
if (!strcmp("MD4", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_MD4);
}
#endif
#if defined(MBEDTLS_MD5_C)
if (!strcmp("MD5", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_MD5);
}
#endif
#if defined(MBEDTLS_RIPEMD160_C)
if (!strcmp("RIPEMD160", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_RIPEMD160);
}
#endif
#if defined(MBEDTLS_SHA1_C)
if (!strcmp("SHA1", md_name) || !strcmp("SHA", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
}
#endif
#if defined(MBEDTLS_SHA256_C)
if (!strcmp("SHA224", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA224);
}
if (!strcmp("SHA256", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
}
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
if (!strcmp("SHA384", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
}
#endif
if (!strcmp("SHA512", md_name)) {
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA512);
}
#endif
return NULL;
}
const mbedtls_md_info_t *mbedtls_md_info_from_type(mbedtls_md_type_t md_type)
{
switch (md_type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return &mbedtls_md2_info;
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return &mbedtls_md4_info;
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return &mbedtls_md5_info;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return &mbedtls_ripemd160_info;
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return &mbedtls_sha1_info;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
return &mbedtls_sha224_info;
case MBEDTLS_MD_SHA256:
return &mbedtls_sha256_info;
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
return &mbedtls_sha384_info;
#endif
case MBEDTLS_MD_SHA512:
return &mbedtls_sha512_info;
#endif
default:
return NULL;
}
}
void mbedtls_md_init(mbedtls_md_context_t *ctx)
{
memset(ctx, 0, sizeof(mbedtls_md_context_t));
}
void mbedtls_md_free(mbedtls_md_context_t *ctx)
{
if (ctx == NULL || ctx->md_info == NULL) {
return;
}
if (ctx->md_ctx != NULL) {
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
mbedtls_md2_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
mbedtls_md4_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
mbedtls_md5_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
mbedtls_ripemd160_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
mbedtls_sha1_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
mbedtls_sha256_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
mbedtls_sha512_free(ctx->md_ctx);
break;
#endif
default:
/* Shouldn't happen */
break;
}
mbedtls_free(ctx->md_ctx);
}
if (ctx->hmac_ctx != NULL) {
mbedtls_platform_zeroize(ctx->hmac_ctx,
2 * ctx->md_info->block_size);
mbedtls_free(ctx->hmac_ctx);
}
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_md_context_t));
}
int mbedtls_md_clone(mbedtls_md_context_t *dst,
const mbedtls_md_context_t *src)
{
if (dst == NULL || dst->md_info == NULL ||
src == NULL || src->md_info == NULL ||
dst->md_info != src->md_info) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (src->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
mbedtls_md2_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
mbedtls_md4_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
mbedtls_md5_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
mbedtls_ripemd160_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
mbedtls_sha1_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
break;
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
return 0;
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
int mbedtls_md_init_ctx(mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info)
{
return mbedtls_md_setup(ctx, md_info, 1);
}
#endif
#define ALLOC(type) \
do { \
ctx->md_ctx = mbedtls_calloc(1, sizeof(mbedtls_##type##_context)); \
if (ctx->md_ctx == NULL) \
return MBEDTLS_ERR_MD_ALLOC_FAILED; \
mbedtls_##type##_init(ctx->md_ctx); \
} \
while (0)
int mbedtls_md_setup(mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac)
{
if (md_info == NULL || ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
ctx->md_info = md_info;
ctx->md_ctx = NULL;
ctx->hmac_ctx = NULL;
switch (md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
ALLOC(md2);
break;
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
ALLOC(md4);
break;
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
ALLOC(md5);
break;
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
ALLOC(ripemd160);
break;
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
ALLOC(sha1);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
ALLOC(sha256);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
ALLOC(sha512);
break;
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
if (hmac != 0) {
ctx->hmac_ctx = mbedtls_calloc(2, md_info->block_size);
if (ctx->hmac_ctx == NULL) {
mbedtls_md_free(ctx);
return MBEDTLS_ERR_MD_ALLOC_FAILED;
}
}
return 0;
}
#undef ALLOC
int mbedtls_md_starts(mbedtls_md_context_t *ctx)
{
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return mbedtls_md2_starts_ret(ctx->md_ctx);
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return mbedtls_md4_starts_ret(ctx->md_ctx);
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_starts_ret(ctx->md_ctx);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_starts_ret(ctx->md_ctx);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_starts_ret(ctx->md_ctx);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256_starts_ret(ctx->md_ctx, 1);
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_starts_ret(ctx->md_ctx, 0);
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512_starts_ret(ctx->md_ctx, 1);
#endif
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_starts_ret(ctx->md_ctx, 0);
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
}
int mbedtls_md_update(mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen)
{
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return mbedtls_md2_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return mbedtls_md4_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_update_ret(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_update_ret(ctx->md_ctx, input, ilen);
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
}
int mbedtls_md_finish(mbedtls_md_context_t *ctx, unsigned char *output)
{
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return mbedtls_md2_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return mbedtls_md4_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_finish_ret(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_finish_ret(ctx->md_ctx, output);
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
}
int mbedtls_md(const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
unsigned char *output)
{
if (md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return mbedtls_md2_ret(input, ilen, output);
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return mbedtls_md4_ret(input, ilen, output);
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_ret(input, ilen, output);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_ret(input, ilen, output);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_ret(input, ilen, output);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256_ret(input, ilen, output, 1);
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_ret(input, ilen, output, 0);
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512_ret(input, ilen, output, 1);
#endif
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_ret(input, ilen, output, 0);
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
}
#if defined(MBEDTLS_FS_IO)
int mbedtls_md_file(const mbedtls_md_info_t *md_info, const char *path, unsigned char *output)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
FILE *f;
size_t n;
mbedtls_md_context_t ctx;
unsigned char buf[1024];
if (md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
if ((f = fopen(path, "rb")) == NULL) {
return MBEDTLS_ERR_MD_FILE_IO_ERROR;
}
mbedtls_md_init(&ctx);
if ((ret = mbedtls_md_setup(&ctx, md_info, 0)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_starts(&ctx)) != 0) {
goto cleanup;
}
while ((n = fread(buf, 1, sizeof(buf), f)) > 0) {
if ((ret = mbedtls_md_update(&ctx, buf, n)) != 0) {
goto cleanup;
}
}
if (ferror(f) != 0) {
ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
} else {
ret = mbedtls_md_finish(&ctx, output);
}
cleanup:
mbedtls_platform_zeroize(buf, sizeof(buf));
fclose(f);
mbedtls_md_free(&ctx);
return ret;
}
#endif /* MBEDTLS_FS_IO */
int mbedtls_md_hmac_starts(mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char sum[MBEDTLS_MD_MAX_SIZE];
unsigned char *ipad, *opad;
size_t i;
if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
if (keylen > (size_t) ctx->md_info->block_size) {
if ((ret = mbedtls_md_starts(ctx)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_update(ctx, key, keylen)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_finish(ctx, sum)) != 0) {
goto cleanup;
}
keylen = ctx->md_info->size;
key = sum;
}
ipad = (unsigned char *) ctx->hmac_ctx;
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
memset(ipad, 0x36, ctx->md_info->block_size);
memset(opad, 0x5C, ctx->md_info->block_size);
for (i = 0; i < keylen; i++) {
ipad[i] = (unsigned char) (ipad[i] ^ key[i]);
opad[i] = (unsigned char) (opad[i] ^ key[i]);
}
if ((ret = mbedtls_md_starts(ctx)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_update(ctx, ipad,
ctx->md_info->block_size)) != 0) {
goto cleanup;
}
cleanup:
mbedtls_platform_zeroize(sum, sizeof(sum));
return ret;
}
int mbedtls_md_hmac_update(mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen)
{
if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
return mbedtls_md_update(ctx, input, ilen);
}
int mbedtls_md_hmac_finish(mbedtls_md_context_t *ctx, unsigned char *output)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
unsigned char *opad;
if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
if ((ret = mbedtls_md_finish(ctx, tmp)) != 0) {
return ret;
}
if ((ret = mbedtls_md_starts(ctx)) != 0) {
return ret;
}
if ((ret = mbedtls_md_update(ctx, opad,
ctx->md_info->block_size)) != 0) {
return ret;
}
if ((ret = mbedtls_md_update(ctx, tmp,
ctx->md_info->size)) != 0) {
return ret;
}
return mbedtls_md_finish(ctx, output);
}
int mbedtls_md_hmac_reset(mbedtls_md_context_t *ctx)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char *ipad;
if (ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
ipad = (unsigned char *) ctx->hmac_ctx;
if ((ret = mbedtls_md_starts(ctx)) != 0) {
return ret;
}
return mbedtls_md_update(ctx, ipad, ctx->md_info->block_size);
}
int mbedtls_md_hmac(const mbedtls_md_info_t *md_info,
const unsigned char *key, size_t keylen,
const unsigned char *input, size_t ilen,
unsigned char *output)
{
mbedtls_md_context_t ctx;
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
if (md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
mbedtls_md_init(&ctx);
if ((ret = mbedtls_md_setup(&ctx, md_info, 1)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_hmac_starts(&ctx, key, keylen)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_hmac_update(&ctx, input, ilen)) != 0) {
goto cleanup;
}
if ((ret = mbedtls_md_hmac_finish(&ctx, output)) != 0) {
goto cleanup;
}
cleanup:
mbedtls_md_free(&ctx);
return ret;
}
int mbedtls_md_process(mbedtls_md_context_t *ctx, const unsigned char *data)
{
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD2_C)
case MBEDTLS_MD_MD2:
return mbedtls_internal_md2_process(ctx->md_ctx);
#endif
#if defined(MBEDTLS_MD4_C)
case MBEDTLS_MD_MD4:
return mbedtls_internal_md4_process(ctx->md_ctx, data);
#endif
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_internal_md5_process(ctx->md_ctx, data);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_internal_ripemd160_process(ctx->md_ctx, data);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_internal_sha1_process(ctx->md_ctx, data);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA224:
case MBEDTLS_MD_SHA256:
return mbedtls_internal_sha256_process(ctx->md_ctx, data);
#endif
#if defined(MBEDTLS_SHA512_C)
#if !defined(MBEDTLS_SHA512_NO_SHA384)
case MBEDTLS_MD_SHA384:
#endif
case MBEDTLS_MD_SHA512:
return mbedtls_internal_sha512_process(ctx->md_ctx, data);
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
}
unsigned char mbedtls_md_get_size(const mbedtls_md_info_t *md_info)
{
if (md_info == NULL) {
return 0;
}
return md_info->size;
}
mbedtls_md_type_t mbedtls_md_get_type(const mbedtls_md_info_t *md_info)
{
if (md_info == NULL) {
return MBEDTLS_MD_NONE;
}
return md_info->type;
}
const char *mbedtls_md_get_name(const mbedtls_md_info_t *md_info)
{
if (md_info == NULL) {
return NULL;
}
return md_info->name;
}
#endif /* MBEDTLS_MD_C */
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