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polarssl/library/md.c
Dave Rodgman 1d4d944e19
Merge pull request #7933 from tom-cosgrove-arm/add-mbedtls_zeroize_and_free 
Provide and use internal function mbedtls_zeroize_and_free()
2023-08-03 12:56:21 +00:00

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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"
/*
* Availability of functions in this module is controlled by two
* feature macros:
* - MBEDTLS_MD_C enables the whole module;
* - MBEDTLS_MD_LIGHT enables only functions for hashing and accessing
* most hash metadata (everything except string names); is it
* automatically set whenever MBEDTLS_MD_C is defined.
*
* In this file, functions from MD_LIGHT are at the top, MD_C at the end.
*
* In the future we may want to change the contract of some functions
* (behaviour with NULL arguments) depending on whether MD_C is defined or
* only MD_LIGHT. Also, the exact scope of MD_LIGHT might vary.
*
* For these reasons, we're keeping MD_LIGHT internal for now.
*/
#if defined(MBEDTLS_MD_LIGHT)
#include "mbedtls/md.h"
#include "md_wrap.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"
#include "mbedtls/md5.h"
#include "mbedtls/ripemd160.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"
#include "mbedtls/sha3.h"
#if defined(MBEDTLS_PSA_CRYPTO_C)
#include <psa/crypto.h>
#include "md_psa.h"
#include "psa_util_internal.h"
#endif
#if defined(MBEDTLS_MD_SOME_PSA)
#include "psa_crypto_core.h"
#endif
#include "mbedtls/platform.h"
#include <string.h>
#if defined(MBEDTLS_FS_IO)
#include <stdio.h>
#endif
/* See comment above MBEDTLS_MD_MAX_SIZE in md.h */
#if defined(MBEDTLS_PSA_CRYPTO_C) && MBEDTLS_MD_MAX_SIZE < PSA_HASH_MAX_SIZE
#error "Internal error: MBEDTLS_MD_MAX_SIZE < PSA_HASH_MAX_SIZE"
#endif
#if defined(MBEDTLS_MD_C)
#define MD_INFO(type, out_size, block_size) type, out_size, block_size,
#else
#define MD_INFO(type, out_size, block_size) type, out_size,
#endif
#if defined(MBEDTLS_MD_CAN_MD5)
static const mbedtls_md_info_t mbedtls_md5_info = {
MD_INFO(MBEDTLS_MD_MD5, 16, 64)
};
#endif
#if defined(MBEDTLS_MD_CAN_RIPEMD160)
static const mbedtls_md_info_t mbedtls_ripemd160_info = {
MD_INFO(MBEDTLS_MD_RIPEMD160, 20, 64)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA1)
static const mbedtls_md_info_t mbedtls_sha1_info = {
MD_INFO(MBEDTLS_MD_SHA1, 20, 64)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA224)
static const mbedtls_md_info_t mbedtls_sha224_info = {
MD_INFO(MBEDTLS_MD_SHA224, 28, 64)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA256)
static const mbedtls_md_info_t mbedtls_sha256_info = {
MD_INFO(MBEDTLS_MD_SHA256, 32, 64)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA384)
static const mbedtls_md_info_t mbedtls_sha384_info = {
MD_INFO(MBEDTLS_MD_SHA384, 48, 128)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA512)
static const mbedtls_md_info_t mbedtls_sha512_info = {
MD_INFO(MBEDTLS_MD_SHA512, 64, 128)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_224)
static const mbedtls_md_info_t mbedtls_sha3_224_info = {
MD_INFO(MBEDTLS_MD_SHA3_224, 28, 144)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_256)
static const mbedtls_md_info_t mbedtls_sha3_256_info = {
MD_INFO(MBEDTLS_MD_SHA3_256, 32, 136)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_384)
static const mbedtls_md_info_t mbedtls_sha3_384_info = {
MD_INFO(MBEDTLS_MD_SHA3_384, 48, 104)
};
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_512)
static const mbedtls_md_info_t mbedtls_sha3_512_info = {
MD_INFO(MBEDTLS_MD_SHA3_512, 64, 72)
};
#endif
const mbedtls_md_info_t *mbedtls_md_info_from_type(mbedtls_md_type_t md_type)
{
switch (md_type) {
#if defined(MBEDTLS_MD_CAN_MD5)
case MBEDTLS_MD_MD5:
return &mbedtls_md5_info;
#endif
#if defined(MBEDTLS_MD_CAN_RIPEMD160)
case MBEDTLS_MD_RIPEMD160:
return &mbedtls_ripemd160_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA1)
case MBEDTLS_MD_SHA1:
return &mbedtls_sha1_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA224)
case MBEDTLS_MD_SHA224:
return &mbedtls_sha224_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA256)
case MBEDTLS_MD_SHA256:
return &mbedtls_sha256_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA384)
case MBEDTLS_MD_SHA384:
return &mbedtls_sha384_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA512)
case MBEDTLS_MD_SHA512:
return &mbedtls_sha512_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_224)
case MBEDTLS_MD_SHA3_224:
return &mbedtls_sha3_224_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_256)
case MBEDTLS_MD_SHA3_256:
return &mbedtls_sha3_256_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_384)
case MBEDTLS_MD_SHA3_384:
return &mbedtls_sha3_384_info;
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_512)
case MBEDTLS_MD_SHA3_512:
return &mbedtls_sha3_512_info;
#endif
default:
return NULL;
}
}
#if defined(MBEDTLS_MD_SOME_PSA)
static psa_algorithm_t psa_alg_of_md(const mbedtls_md_info_t *info)
{
switch (info->type) {
#if defined(MBEDTLS_MD_MD5_VIA_PSA)
case MBEDTLS_MD_MD5:
return PSA_ALG_MD5;
#endif
#if defined(MBEDTLS_MD_RIPEMD160_VIA_PSA)
case MBEDTLS_MD_RIPEMD160:
return PSA_ALG_RIPEMD160;
#endif
#if defined(MBEDTLS_MD_SHA1_VIA_PSA)
case MBEDTLS_MD_SHA1:
return PSA_ALG_SHA_1;
#endif
#if defined(MBEDTLS_MD_SHA224_VIA_PSA)
case MBEDTLS_MD_SHA224:
return PSA_ALG_SHA_224;
#endif
#if defined(MBEDTLS_MD_SHA256_VIA_PSA)
case MBEDTLS_MD_SHA256:
return PSA_ALG_SHA_256;
#endif
#if defined(MBEDTLS_MD_SHA384_VIA_PSA)
case MBEDTLS_MD_SHA384:
return PSA_ALG_SHA_384;
#endif
#if defined(MBEDTLS_MD_SHA512_VIA_PSA)
case MBEDTLS_MD_SHA512:
return PSA_ALG_SHA_512;
#endif
default:
return PSA_ALG_NONE;
}
}
static int md_can_use_psa(const mbedtls_md_info_t *info)
{
psa_algorithm_t alg = psa_alg_of_md(info);
if (alg == PSA_ALG_NONE) {
return 0;
}
return psa_can_do_hash(alg);
}
#endif /* MBEDTLS_MD_SOME_PSA */
void mbedtls_md_init(mbedtls_md_context_t *ctx)
{
/* Note: this sets engine (if present) to MBEDTLS_MD_ENGINE_LEGACY */
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) {
#if defined(MBEDTLS_MD_SOME_PSA)
if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
psa_hash_abort(ctx->md_ctx);
} else
#endif
switch (ctx->md_info->type) {
#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_SHA224_C)
case MBEDTLS_MD_SHA224:
mbedtls_sha256_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
mbedtls_sha256_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
mbedtls_sha512_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
mbedtls_sha512_free(ctx->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
case MBEDTLS_MD_SHA3_256:
case MBEDTLS_MD_SHA3_384:
case MBEDTLS_MD_SHA3_512:
mbedtls_sha3_free(ctx->md_ctx);
break;
#endif
default:
/* Shouldn't happen */
break;
}
mbedtls_free(ctx->md_ctx);
}
#if defined(MBEDTLS_MD_C)
if (ctx->hmac_ctx != NULL) {
mbedtls_zeroize_and_free(ctx->hmac_ctx,
2 * ctx->md_info->block_size);
}
#endif
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;
}
#if defined(MBEDTLS_MD_SOME_PSA)
if (src->engine != dst->engine) {
/* This can happen with src set to legacy because PSA wasn't ready
* yet, and dst to PSA because it became ready in the meantime.
* We currently don't support that case (we'd need to re-allocate
* md_ctx to the size of the appropriate MD context). */
return MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE;
}
if (src->engine == MBEDTLS_MD_ENGINE_PSA) {
psa_status_t status = psa_hash_clone(src->md_ctx, dst->md_ctx);
return mbedtls_md_error_from_psa(status);
}
#endif
switch (src->md_info->type) {
#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_SHA224_C)
case MBEDTLS_MD_SHA224:
mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
break;
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
case MBEDTLS_MD_SHA3_256:
case MBEDTLS_MD_SHA3_384:
case MBEDTLS_MD_SHA3_512:
mbedtls_sha3_clone(dst->md_ctx, src->md_ctx);
break;
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
return 0;
}
#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 defined(MBEDTLS_MD_C)
if (ctx == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#endif
if (md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
ctx->md_info = md_info;
ctx->md_ctx = NULL;
#if defined(MBEDTLS_MD_C)
ctx->hmac_ctx = NULL;
#else
if (hmac != 0) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#endif
#if defined(MBEDTLS_MD_SOME_PSA)
if (md_can_use_psa(ctx->md_info)) {
ctx->md_ctx = mbedtls_calloc(1, sizeof(psa_hash_operation_t));
if (ctx->md_ctx == NULL) {
return MBEDTLS_ERR_MD_ALLOC_FAILED;
}
ctx->engine = MBEDTLS_MD_ENGINE_PSA;
} else
#endif
switch (md_info->type) {
#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_SHA224_C)
case MBEDTLS_MD_SHA224:
ALLOC(sha256);
break;
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
ALLOC(sha256);
break;
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
ALLOC(sha512);
break;
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
ALLOC(sha512);
break;
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
case MBEDTLS_MD_SHA3_256:
case MBEDTLS_MD_SHA3_384:
case MBEDTLS_MD_SHA3_512:
ALLOC(sha3);
break;
#endif
default:
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#if defined(MBEDTLS_MD_C)
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;
}
}
#endif
return 0;
}
#undef ALLOC
int mbedtls_md_starts(mbedtls_md_context_t *ctx)
{
#if defined(MBEDTLS_MD_C)
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#endif
#if defined(MBEDTLS_MD_SOME_PSA)
if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
psa_algorithm_t alg = psa_alg_of_md(ctx->md_info);
psa_hash_abort(ctx->md_ctx);
psa_status_t status = psa_hash_setup(ctx->md_ctx, alg);
return mbedtls_md_error_from_psa(status);
}
#endif
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_starts(ctx->md_ctx);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_starts(ctx->md_ctx);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_starts(ctx->md_ctx);
#endif
#if defined(MBEDTLS_SHA224_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256_starts(ctx->md_ctx, 1);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_starts(ctx->md_ctx, 0);
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512_starts(ctx->md_ctx, 1);
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_starts(ctx->md_ctx, 0);
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
return mbedtls_sha3_starts(ctx->md_ctx, MBEDTLS_SHA3_224);
case MBEDTLS_MD_SHA3_256:
return mbedtls_sha3_starts(ctx->md_ctx, MBEDTLS_SHA3_256);
case MBEDTLS_MD_SHA3_384:
return mbedtls_sha3_starts(ctx->md_ctx, MBEDTLS_SHA3_384);
case MBEDTLS_MD_SHA3_512:
return mbedtls_sha3_starts(ctx->md_ctx, MBEDTLS_SHA3_512);
#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 defined(MBEDTLS_MD_C)
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#endif
#if defined(MBEDTLS_MD_SOME_PSA)
if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
psa_status_t status = psa_hash_update(ctx->md_ctx, input, ilen);
return mbedtls_md_error_from_psa(status);
}
#endif
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA224_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
case MBEDTLS_MD_SHA3_256:
case MBEDTLS_MD_SHA3_384:
case MBEDTLS_MD_SHA3_512:
return mbedtls_sha3_update(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 defined(MBEDTLS_MD_C)
if (ctx == NULL || ctx->md_info == NULL) {
return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
}
#endif
#if defined(MBEDTLS_MD_SOME_PSA)
if (ctx->engine == MBEDTLS_MD_ENGINE_PSA) {
size_t size = ctx->md_info->size;
psa_status_t status = psa_hash_finish(ctx->md_ctx,
output, size, &size);
return mbedtls_md_error_from_psa(status);
}
#endif
switch (ctx->md_info->type) {
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA224_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
return mbedtls_sha256_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
return mbedtls_sha512_finish(ctx->md_ctx, output);
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
case MBEDTLS_MD_SHA3_256:
case MBEDTLS_MD_SHA3_384:
case MBEDTLS_MD_SHA3_512:
return mbedtls_sha3_finish(ctx->md_ctx, output, ctx->md_info->size);
#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;
}
#if defined(MBEDTLS_MD_SOME_PSA)
if (md_can_use_psa(md_info)) {
size_t size = md_info->size;
psa_status_t status = psa_hash_compute(psa_alg_of_md(md_info),
input, ilen,
output, size, &size);
return mbedtls_md_error_from_psa(status);
}
#endif
switch (md_info->type) {
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_MD_MD5:
return mbedtls_md5(input, ilen, output);
#endif
#if defined(MBEDTLS_RIPEMD160_C)
case MBEDTLS_MD_RIPEMD160:
return mbedtls_ripemd160(input, ilen, output);
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_MD_SHA1:
return mbedtls_sha1(input, ilen, output);
#endif
#if defined(MBEDTLS_SHA224_C)
case MBEDTLS_MD_SHA224:
return mbedtls_sha256(input, ilen, output, 1);
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_MD_SHA256:
return mbedtls_sha256(input, ilen, output, 0);
#endif
#if defined(MBEDTLS_SHA384_C)
case MBEDTLS_MD_SHA384:
return mbedtls_sha512(input, ilen, output, 1);
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_MD_SHA512:
return mbedtls_sha512(input, ilen, output, 0);
#endif
#if defined(MBEDTLS_SHA3_C)
case MBEDTLS_MD_SHA3_224:
return mbedtls_sha3(MBEDTLS_SHA3_224, input, ilen, output, md_info->size);
case MBEDTLS_MD_SHA3_256:
return mbedtls_sha3(MBEDTLS_SHA3_256, input, ilen, output, md_info->size);
case MBEDTLS_MD_SHA3_384:
return mbedtls_sha3(MBEDTLS_SHA3_384, input, ilen, output, md_info->size);
case MBEDTLS_MD_SHA3_512:
return mbedtls_sha3(MBEDTLS_SHA3_512, input, ilen, output, md_info->size);
#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;
}
#if defined(MBEDTLS_PSA_CRYPTO_C)
int mbedtls_md_error_from_psa(psa_status_t status)
{
return PSA_TO_MBEDTLS_ERR_LIST(status, psa_to_md_errors,
psa_generic_status_to_mbedtls);
}
#endif /* MBEDTLS_PSA_CRYPTO_C */
/************************************************************************
* Functions above this separator are part of MBEDTLS_MD_LIGHT, *
* functions below are only available when MBEDTLS_MD_C is set. *
************************************************************************/
#if defined(MBEDTLS_MD_C)
/*
* Reminder: update profiles in x509_crt.c when adding a new hash!
*/
static const int supported_digests[] = {
#if defined(MBEDTLS_MD_CAN_SHA512)
MBEDTLS_MD_SHA512,
#endif
#if defined(MBEDTLS_MD_CAN_SHA384)
MBEDTLS_MD_SHA384,
#endif
#if defined(MBEDTLS_MD_CAN_SHA256)
MBEDTLS_MD_SHA256,
#endif
#if defined(MBEDTLS_MD_CAN_SHA224)
MBEDTLS_MD_SHA224,
#endif
#if defined(MBEDTLS_MD_CAN_SHA1)
MBEDTLS_MD_SHA1,
#endif
#if defined(MBEDTLS_MD_CAN_RIPEMD160)
MBEDTLS_MD_RIPEMD160,
#endif
#if defined(MBEDTLS_MD_CAN_MD5)
MBEDTLS_MD_MD5,
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_224)
MBEDTLS_MD_SHA3_224,
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_256)
MBEDTLS_MD_SHA3_256,
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_384)
MBEDTLS_MD_SHA3_384,
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_512)
MBEDTLS_MD_SHA3_512,
#endif
MBEDTLS_MD_NONE
};
const int *mbedtls_md_list(void)
{
return supported_digests;
}
typedef struct {
const char *md_name;
mbedtls_md_type_t md_type;
} md_name_entry;
static const md_name_entry md_names[] = {
#if defined(MBEDTLS_MD_CAN_MD5)
{ "MD5", MBEDTLS_MD_MD5 },
#endif
#if defined(MBEDTLS_MD_CAN_RIPEMD160)
{ "RIPEMD160", MBEDTLS_MD_RIPEMD160 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA1)
{ "SHA1", MBEDTLS_MD_SHA1 },
{ "SHA", MBEDTLS_MD_SHA1 }, // compatibility fallback
#endif
#if defined(MBEDTLS_MD_CAN_SHA224)
{ "SHA224", MBEDTLS_MD_SHA224 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA256)
{ "SHA256", MBEDTLS_MD_SHA256 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA384)
{ "SHA384", MBEDTLS_MD_SHA384 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA512)
{ "SHA512", MBEDTLS_MD_SHA512 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_224)
{ "SHA3-224", MBEDTLS_MD_SHA3_224 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_256)
{ "SHA3-256", MBEDTLS_MD_SHA3_256 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_384)
{ "SHA3-384", MBEDTLS_MD_SHA3_384 },
#endif
#if defined(MBEDTLS_MD_CAN_SHA3_512)
{ "SHA3-512", MBEDTLS_MD_SHA3_512 },
#endif
{ NULL, MBEDTLS_MD_NONE },
};
const mbedtls_md_info_t *mbedtls_md_info_from_string(const char *md_name)
{
if (NULL == md_name) {
return NULL;
}
const md_name_entry *entry = md_names;
while (entry->md_name != NULL &&
strcmp(entry->md_name, md_name) != 0) {
++entry;
}
return mbedtls_md_info_from_type(entry->md_type);
}
const char *mbedtls_md_get_name(const mbedtls_md_info_t *md_info)
{
if (md_info == NULL) {
return NULL;
}
const md_name_entry *entry = md_names;
while (entry->md_type != MBEDTLS_MD_NONE &&
entry->md_type != md_info->type) {
++entry;
}
return entry->md_name;
}
const mbedtls_md_info_t *mbedtls_md_info_from_ctx(
const mbedtls_md_context_t *ctx)
{
if (ctx == NULL) {
return NULL;
}
return ctx->MBEDTLS_PRIVATE(md_info);
}
#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;
}
/* Ensure no stdio buffering of secrets, as such buffers cannot be wiped. */
mbedtls_setbuf(f, NULL);
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;
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);
mbedtls_xor(ipad, ipad, key, keylen);
mbedtls_xor(opad, opad, key, keylen);
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;
}
#endif /* MBEDTLS_MD_C */
#endif /* MBEDTLS_MD_LIGHT */
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