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proxmark3/common/mbedtls/md.c
Philippe Teuwen 961d929f4d changing {} style to match majority of previous style
2019-03-10 11:20:22 +01:00

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/**
* \file mbedtls_md.c
*
* \brief Generic message digest wrapper for mbed TLS
*
* \author Adriaan de Jong <dejong@fox-it.com>
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: GPL-2.0
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#if defined(MBEDTLS_MD_C)
#include "mbedtls/md.h"
#include "mbedtls/md_internal.h"
#include "mbedtls/platform_util.h"
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdlib.h>
#define mbedtls_calloc calloc
#define mbedtls_free free
#endif
#include <string.h>
#if defined(MBEDTLS_FS_IO)
#include <stdio.h>
#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,
MBEDTLS_MD_SHA384,
#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 (!strcmp("SHA384", md_name))
return mbedtls_md_info_from_type(MBEDTLS_MD_SHA384);
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)
case MBEDTLS_MD_SHA384:
return (&mbedtls_sha384_info);
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)
ctx->md_info->ctx_free_func(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);
}
dst->md_info->clone_func(dst->md_ctx, src->md_ctx);
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
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);
if ((ctx->md_ctx = md_info->ctx_alloc_func()) == NULL)
return (MBEDTLS_ERR_MD_ALLOC_FAILED);
if (hmac != 0) {
ctx->hmac_ctx = mbedtls_calloc(2, md_info->block_size);
if (ctx->hmac_ctx == NULL) {
md_info->ctx_free_func(ctx->md_ctx);
return (MBEDTLS_ERR_MD_ALLOC_FAILED);
}
}
ctx->md_info = md_info;
return (0);
}
int mbedtls_md_starts(mbedtls_md_context_t *ctx) {
if (ctx == NULL || ctx->md_info == NULL)
return (MBEDTLS_ERR_MD_BAD_INPUT_DATA);
return (ctx->md_info->starts_func(ctx->md_ctx));
}
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);
return (ctx->md_info->update_func(ctx->md_ctx, input, ilen));
}
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);
return (ctx->md_info->finish_func(ctx->md_ctx, output));
}
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);
return (md_info->digest_func(input, ilen, output));
}
#if defined(MBEDTLS_FS_IO)
int mbedtls_md_file(const mbedtls_md_info_t *md_info, const char *path, unsigned char *output) {
int ret;
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 = md_info->starts_func(ctx.md_ctx)) != 0)
goto cleanup;
while ((n = fread(buf, 1, sizeof(buf), f)) > 0)
if ((ret = md_info->update_func(ctx.md_ctx, buf, n)) != 0)
goto cleanup;
if (ferror(f) != 0)
ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
else
ret = md_info->finish_func(ctx.md_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;
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 = ctx->md_info->starts_func(ctx->md_ctx)) != 0)
goto cleanup;
if ((ret = ctx->md_info->update_func(ctx->md_ctx, key, keylen)) != 0)
goto cleanup;
if ((ret = ctx->md_info->finish_func(ctx->md_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 = ctx->md_info->starts_func(ctx->md_ctx)) != 0)
goto cleanup;
if ((ret = ctx->md_info->update_func(ctx->md_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 (ctx->md_info->update_func(ctx->md_ctx, input, ilen));
}
int mbedtls_md_hmac_finish(mbedtls_md_context_t *ctx, unsigned char *output) {
int ret;
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 = ctx->md_info->finish_func(ctx->md_ctx, tmp)) != 0)
return (ret);
if ((ret = ctx->md_info->starts_func(ctx->md_ctx)) != 0)
return (ret);
if ((ret = ctx->md_info->update_func(ctx->md_ctx, opad,
ctx->md_info->block_size)) != 0)
return (ret);
if ((ret = ctx->md_info->update_func(ctx->md_ctx, tmp,
ctx->md_info->size)) != 0)
return (ret);
return (ctx->md_info->finish_func(ctx->md_ctx, output));
}
int mbedtls_md_hmac_reset(mbedtls_md_context_t *ctx) {
int ret;
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 = ctx->md_info->starts_func(ctx->md_ctx)) != 0)
return (ret);
return (ctx->md_info->update_func(ctx->md_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;
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);
return (ctx->md_info->process_func(ctx->md_ctx, 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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