mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-27 01:48:17 +00:00
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/**
|
|
* Copyright (c) 2013-2014 Tomas Dzetkulic
|
|
* Copyright (c) 2013-2014 Pavol Rusnak
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "hmac.h"
|
|
#include "sha2.h"
|
|
#include "macros.h"
|
|
|
|
void hmac_sha256(const uint8_t *key, const uint32_t keylen, const uint8_t *msg, const uint32_t msglen, uint8_t *hmac)
|
|
{
|
|
int i;
|
|
uint8_t buf[SHA256_BLOCK_LENGTH], o_key_pad[SHA256_BLOCK_LENGTH], i_key_pad[SHA256_BLOCK_LENGTH];
|
|
SHA256_CTX ctx;
|
|
|
|
memset(buf, 0, SHA256_BLOCK_LENGTH);
|
|
if (keylen > SHA256_BLOCK_LENGTH) {
|
|
sha256_Raw(key, keylen, buf);
|
|
} else {
|
|
memcpy(buf, key, keylen);
|
|
}
|
|
|
|
for (i = 0; i < SHA256_BLOCK_LENGTH; i++) {
|
|
o_key_pad[i] = buf[i] ^ 0x5c;
|
|
i_key_pad[i] = buf[i] ^ 0x36;
|
|
}
|
|
|
|
sha256_Init(&ctx);
|
|
sha256_Update(&ctx, i_key_pad, SHA256_BLOCK_LENGTH);
|
|
sha256_Update(&ctx, msg, msglen);
|
|
sha256_Final(buf, &ctx);
|
|
|
|
sha256_Init(&ctx);
|
|
sha256_Update(&ctx, o_key_pad, SHA256_BLOCK_LENGTH);
|
|
sha256_Update(&ctx, buf, SHA256_DIGEST_LENGTH);
|
|
sha256_Final(hmac, &ctx);
|
|
MEMSET_BZERO(buf, sizeof(buf));
|
|
MEMSET_BZERO(o_key_pad, sizeof(o_key_pad));
|
|
MEMSET_BZERO(i_key_pad, sizeof(i_key_pad));
|
|
}
|
|
|
|
void hmac_sha512(const uint8_t *key, const uint32_t keylen, const uint8_t *msg, const uint32_t msglen, uint8_t *hmac)
|
|
{
|
|
int i;
|
|
uint8_t buf[SHA512_BLOCK_LENGTH], o_key_pad[SHA512_BLOCK_LENGTH], i_key_pad[SHA512_BLOCK_LENGTH];
|
|
SHA512_CTX ctx;
|
|
|
|
memset(buf, 0, SHA512_BLOCK_LENGTH);
|
|
if (keylen > SHA512_BLOCK_LENGTH) {
|
|
sha512_Raw(key, keylen, buf);
|
|
} else {
|
|
memcpy(buf, key, keylen);
|
|
}
|
|
|
|
for (i = 0; i < SHA512_BLOCK_LENGTH; i++) {
|
|
o_key_pad[i] = buf[i] ^ 0x5c;
|
|
i_key_pad[i] = buf[i] ^ 0x36;
|
|
}
|
|
|
|
sha512_Init(&ctx);
|
|
sha512_Update(&ctx, i_key_pad, SHA512_BLOCK_LENGTH);
|
|
sha512_Update(&ctx, msg, msglen);
|
|
sha512_Final(buf, &ctx);
|
|
|
|
sha512_Init(&ctx);
|
|
sha512_Update(&ctx, o_key_pad, SHA512_BLOCK_LENGTH);
|
|
sha512_Update(&ctx, buf, SHA512_DIGEST_LENGTH);
|
|
sha512_Final(hmac, &ctx);
|
|
|
|
MEMSET_BZERO(buf, sizeof(buf));
|
|
MEMSET_BZERO(o_key_pad, sizeof(o_key_pad));
|
|
MEMSET_BZERO(i_key_pad, sizeof(i_key_pad));
|
|
}
|