828 lines
21 KiB
C
828 lines
21 KiB
C
/**
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* \file md.c
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*
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* \brief Generic message digest wrapper for mbed TLS
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*
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* \author Adriaan de Jong <dejong@fox-it.com>
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "common.h"
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/*
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* Availability of functions in this module is controlled by two
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* feature macros:
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* - MBEDTLS_MD_C enables the whole module;
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* - MBEDTLS_MD_LIGHT enables only functions for hashing and accessing
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* most hash metadata (everything except string names); is it
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* automatically set whenever MBEDTLS_MD_C is defined.
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*
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* In this file, functions from MD_LIGHT are at the top, MD_C at the end.
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*
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* In the future we may want to change the contract of some functions
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* (behaviour with NULL arguments) depending on whether MD_C is defined or
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* only MD_LIGHT. Also, the exact scope of MD_LIGHT might vary.
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*
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* For these reasons, we're keeping MD_LIGHT internal for now.
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*/
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#if defined(MBEDTLS_MD_LIGHT)
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#include "mbedtls/md.h"
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#include "md_wrap.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#include "mbedtls/md5.h"
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#include "mbedtls/ripemd160.h"
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#include "mbedtls/sha1.h"
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#include "mbedtls/sha256.h"
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#include "mbedtls/sha512.h"
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#include "mbedtls/platform.h"
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#include <string.h>
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#if defined(MBEDTLS_FS_IO)
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#include <stdio.h>
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#endif
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#if defined(MBEDTLS_MD5_C)
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const mbedtls_md_info_t mbedtls_md5_info = {
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"MD5",
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MBEDTLS_MD_MD5,
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16,
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64,
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};
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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const mbedtls_md_info_t mbedtls_ripemd160_info = {
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"RIPEMD160",
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MBEDTLS_MD_RIPEMD160,
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20,
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64,
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};
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#endif
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#if defined(MBEDTLS_SHA1_C)
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const mbedtls_md_info_t mbedtls_sha1_info = {
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"SHA1",
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MBEDTLS_MD_SHA1,
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20,
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64,
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};
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#endif
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#if defined(MBEDTLS_SHA224_C)
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const mbedtls_md_info_t mbedtls_sha224_info = {
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"SHA224",
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MBEDTLS_MD_SHA224,
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28,
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64,
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};
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#endif
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#if defined(MBEDTLS_SHA256_C)
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const mbedtls_md_info_t mbedtls_sha256_info = {
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"SHA256",
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MBEDTLS_MD_SHA256,
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32,
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64,
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};
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#endif
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#if defined(MBEDTLS_SHA384_C)
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const mbedtls_md_info_t mbedtls_sha384_info = {
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"SHA384",
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MBEDTLS_MD_SHA384,
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48,
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128,
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};
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#endif
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#if defined(MBEDTLS_SHA512_C)
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const mbedtls_md_info_t mbedtls_sha512_info = {
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"SHA512",
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MBEDTLS_MD_SHA512,
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64,
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128,
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};
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#endif
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const mbedtls_md_info_t *mbedtls_md_info_from_type(mbedtls_md_type_t md_type)
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{
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switch (md_type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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return &mbedtls_md5_info;
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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return &mbedtls_ripemd160_info;
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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return &mbedtls_sha1_info;
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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return &mbedtls_sha224_info;
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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return &mbedtls_sha256_info;
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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return &mbedtls_sha384_info;
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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return &mbedtls_sha512_info;
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#endif
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default:
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return NULL;
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}
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}
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void mbedtls_md_init(mbedtls_md_context_t *ctx)
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{
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memset(ctx, 0, sizeof(mbedtls_md_context_t));
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}
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void mbedtls_md_free(mbedtls_md_context_t *ctx)
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{
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if (ctx == NULL || ctx->md_info == NULL) {
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return;
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}
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if (ctx->md_ctx != NULL) {
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switch (ctx->md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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mbedtls_md5_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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mbedtls_ripemd160_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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mbedtls_sha1_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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mbedtls_sha256_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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mbedtls_sha256_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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mbedtls_sha512_free(ctx->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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mbedtls_sha512_free(ctx->md_ctx);
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break;
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#endif
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default:
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/* Shouldn't happen */
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break;
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}
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mbedtls_free(ctx->md_ctx);
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}
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if (ctx->hmac_ctx != NULL) {
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mbedtls_platform_zeroize(ctx->hmac_ctx,
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2 * ctx->md_info->block_size);
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mbedtls_free(ctx->hmac_ctx);
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}
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mbedtls_platform_zeroize(ctx, sizeof(mbedtls_md_context_t));
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}
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int mbedtls_md_clone(mbedtls_md_context_t *dst,
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const mbedtls_md_context_t *src)
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{
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if (dst == NULL || dst->md_info == NULL ||
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src == NULL || src->md_info == NULL ||
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dst->md_info != src->md_info) {
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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switch (src->md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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mbedtls_md5_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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mbedtls_ripemd160_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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mbedtls_sha1_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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mbedtls_sha256_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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mbedtls_sha512_clone(dst->md_ctx, src->md_ctx);
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break;
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#endif
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default:
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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return 0;
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}
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#define ALLOC(type) \
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do { \
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ctx->md_ctx = mbedtls_calloc(1, sizeof(mbedtls_##type##_context)); \
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if (ctx->md_ctx == NULL) \
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return MBEDTLS_ERR_MD_ALLOC_FAILED; \
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mbedtls_##type##_init(ctx->md_ctx); \
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} \
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while (0)
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int mbedtls_md_setup(mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac)
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{
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if (md_info == NULL || ctx == NULL) {
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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ctx->md_info = md_info;
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ctx->md_ctx = NULL;
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ctx->hmac_ctx = NULL;
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switch (md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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ALLOC(md5);
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break;
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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ALLOC(ripemd160);
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break;
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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ALLOC(sha1);
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break;
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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ALLOC(sha256);
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break;
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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ALLOC(sha256);
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break;
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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ALLOC(sha512);
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break;
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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ALLOC(sha512);
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break;
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#endif
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default:
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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if (hmac != 0) {
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ctx->hmac_ctx = mbedtls_calloc(2, md_info->block_size);
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if (ctx->hmac_ctx == NULL) {
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mbedtls_md_free(ctx);
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return MBEDTLS_ERR_MD_ALLOC_FAILED;
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}
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}
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return 0;
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}
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#undef ALLOC
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int mbedtls_md_starts(mbedtls_md_context_t *ctx)
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{
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if (ctx == NULL || ctx->md_info == NULL) {
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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switch (ctx->md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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return mbedtls_md5_starts(ctx->md_ctx);
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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return mbedtls_ripemd160_starts(ctx->md_ctx);
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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return mbedtls_sha1_starts(ctx->md_ctx);
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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return mbedtls_sha256_starts(ctx->md_ctx, 1);
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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return mbedtls_sha256_starts(ctx->md_ctx, 0);
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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return mbedtls_sha512_starts(ctx->md_ctx, 1);
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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return mbedtls_sha512_starts(ctx->md_ctx, 0);
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#endif
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default:
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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}
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int mbedtls_md_update(mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen)
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{
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if (ctx == NULL || ctx->md_info == NULL) {
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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switch (ctx->md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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return mbedtls_md5_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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return mbedtls_ripemd160_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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return mbedtls_sha1_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
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return mbedtls_sha256_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_SHA384_C)
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case MBEDTLS_MD_SHA384:
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return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
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#endif
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#if defined(MBEDTLS_SHA512_C)
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case MBEDTLS_MD_SHA512:
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return mbedtls_sha512_update(ctx->md_ctx, input, ilen);
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#endif
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default:
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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}
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int mbedtls_md_finish(mbedtls_md_context_t *ctx, unsigned char *output)
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{
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if (ctx == NULL || ctx->md_info == NULL) {
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
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}
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|
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switch (ctx->md_info->type) {
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#if defined(MBEDTLS_MD5_C)
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case MBEDTLS_MD_MD5:
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return mbedtls_md5_finish(ctx->md_ctx, output);
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#endif
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#if defined(MBEDTLS_RIPEMD160_C)
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case MBEDTLS_MD_RIPEMD160:
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return mbedtls_ripemd160_finish(ctx->md_ctx, output);
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#endif
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#if defined(MBEDTLS_SHA1_C)
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case MBEDTLS_MD_SHA1:
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return mbedtls_sha1_finish(ctx->md_ctx, output);
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#endif
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#if defined(MBEDTLS_SHA224_C)
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case MBEDTLS_MD_SHA224:
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return mbedtls_sha256_finish(ctx->md_ctx, output);
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#endif
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#if defined(MBEDTLS_SHA256_C)
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case MBEDTLS_MD_SHA256:
|
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return mbedtls_sha256_finish(ctx->md_ctx, output);
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#endif
|
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#if defined(MBEDTLS_SHA384_C)
|
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case MBEDTLS_MD_SHA384:
|
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return mbedtls_sha512_finish(ctx->md_ctx, output);
|
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#endif
|
|
#if defined(MBEDTLS_SHA512_C)
|
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case MBEDTLS_MD_SHA512:
|
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return mbedtls_sha512_finish(ctx->md_ctx, output);
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#endif
|
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default:
|
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
|
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}
|
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}
|
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|
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int mbedtls_md(const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
|
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unsigned char *output)
|
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{
|
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if (md_info == NULL) {
|
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return MBEDTLS_ERR_MD_BAD_INPUT_DATA;
|
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}
|
|
|
|
switch (md_info->type) {
|
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#if defined(MBEDTLS_MD5_C)
|
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case MBEDTLS_MD_MD5:
|
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return mbedtls_md5(input, ilen, output);
|
|
#endif
|
|
#if defined(MBEDTLS_RIPEMD160_C)
|
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case MBEDTLS_MD_RIPEMD160:
|
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return mbedtls_ripemd160(input, ilen, output);
|
|
#endif
|
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#if defined(MBEDTLS_SHA1_C)
|
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case MBEDTLS_MD_SHA1:
|
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return mbedtls_sha1(input, ilen, output);
|
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#endif
|
|
#if defined(MBEDTLS_SHA224_C)
|
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case MBEDTLS_MD_SHA224:
|
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return mbedtls_sha256(input, ilen, output, 1);
|
|
#endif
|
|
#if defined(MBEDTLS_SHA256_C)
|
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case MBEDTLS_MD_SHA256:
|
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return mbedtls_sha256(input, ilen, output, 0);
|
|
#endif
|
|
#if defined(MBEDTLS_SHA384_C)
|
|
case MBEDTLS_MD_SHA384:
|
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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
|
|
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;
|
|
}
|
|
|
|
/************************************************************************
|
|
* 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_SHA512_C)
|
|
MBEDTLS_MD_SHA512,
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_SHA384_C)
|
|
MBEDTLS_MD_SHA384,
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_SHA256_C)
|
|
MBEDTLS_MD_SHA256,
|
|
#endif
|
|
#if defined(MBEDTLS_SHA224_C)
|
|
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
|
|
|
|
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_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_SHA224_C)
|
|
if (!strcmp("SHA224", md_name)) {
|
|
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA224);
|
|
}
|
|
#endif
|
|
#if defined(MBEDTLS_SHA256_C)
|
|
if (!strcmp("SHA256", md_name)) {
|
|
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
|
|
}
|
|
#endif
|
|
#if defined(MBEDTLS_SHA384_C)
|
|
if (!strcmp("SHA384", md_name)) {
|
|
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
|
|
}
|
|
#endif
|
|
#if defined(MBEDTLS_SHA512_C)
|
|
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_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;
|
|
}
|
|
|
|
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 */
|
|
|
|
#endif /* MBEDTLS_MD_LIGHT */
|