mirror of
https://github.com/trezor/trezor-firmware.git
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104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/**
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* Copyright (c) 2013-2014 Tomas Dzetkulic
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* Copyright (c) 2013-2014 Pavol Rusnak
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include "pbkdf2.h"
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#include "hmac.h"
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#include "macros.h"
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void pbkdf2_hmac_sha256_Init(PBKDF2_HMAC_SHA256_CTX *pctx, const uint8_t *pass, int passlen, const uint8_t *salt, int saltlen)
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{
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HMAC_SHA256_CTX hctx;
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hmac_sha256_Init(&hctx, pass, passlen);
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hmac_sha256_Update(&hctx, salt, saltlen);
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hmac_sha256_Update(&hctx, (const uint8_t *)"\x00\x00\x00\x01", 4);
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hmac_sha256_Final(&hctx, pctx->g);
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memcpy(pctx->f, pctx->g, SHA256_DIGEST_LENGTH);
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pctx->pass = pass;
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pctx->passlen = passlen;
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pctx->first = 1;
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}
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void pbkdf2_hmac_sha256_Update(PBKDF2_HMAC_SHA256_CTX *pctx, uint32_t iterations)
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{
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for (uint32_t i = pctx->first; i < iterations; i++) {
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hmac_sha256(pctx->pass, pctx->passlen, pctx->g, SHA256_DIGEST_LENGTH, pctx->g);
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for (uint32_t j = 0; j < SHA256_DIGEST_LENGTH; j++) {
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pctx->f[j] ^= pctx->g[j];
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}
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}
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pctx->first = 0;
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}
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void pbkdf2_hmac_sha256_Final(PBKDF2_HMAC_SHA256_CTX *pctx, uint8_t *key)
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{
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memcpy(key, pctx->f, SHA256_DIGEST_LENGTH);
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MEMSET_BZERO(pctx, sizeof(PBKDF2_HMAC_SHA256_CTX));
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}
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void pbkdf2_hmac_sha256(const uint8_t *pass, int passlen, const uint8_t *salt, int saltlen, uint32_t iterations, uint8_t *key)
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{
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PBKDF2_HMAC_SHA256_CTX pctx;
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pbkdf2_hmac_sha256_Init(&pctx, pass, passlen, salt, saltlen);
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pbkdf2_hmac_sha256_Update(&pctx, iterations);
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pbkdf2_hmac_sha256_Final(&pctx, key);
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}
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void pbkdf2_hmac_sha512_Init(PBKDF2_HMAC_SHA512_CTX *pctx, const uint8_t *pass, int passlen, const uint8_t *salt, int saltlen)
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{
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HMAC_SHA512_CTX hctx;
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hmac_sha512_Init(&hctx, pass, passlen);
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hmac_sha512_Update(&hctx, salt, saltlen);
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hmac_sha512_Update(&hctx, (const uint8_t *)"\x00\x00\x00\x01", 4);
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hmac_sha512_Final(&hctx, pctx->g);
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memcpy(pctx->f, pctx->g, SHA512_DIGEST_LENGTH);
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pctx->pass = pass;
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pctx->passlen = passlen;
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pctx->first = 1;
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}
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void pbkdf2_hmac_sha512_Update(PBKDF2_HMAC_SHA512_CTX *pctx, uint32_t iterations)
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{
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for (uint32_t i = pctx->first; i < iterations; i++) {
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hmac_sha512(pctx->pass, pctx->passlen, pctx->g, SHA512_DIGEST_LENGTH, pctx->g);
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for (uint32_t j = 0; j < SHA512_DIGEST_LENGTH; j++) {
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pctx->f[j] ^= pctx->g[j];
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}
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}
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pctx->first = 0;
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}
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void pbkdf2_hmac_sha512_Final(PBKDF2_HMAC_SHA512_CTX *pctx, uint8_t *key)
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{
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memcpy(key, pctx->f, SHA512_DIGEST_LENGTH);
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MEMSET_BZERO(pctx, sizeof(PBKDF2_HMAC_SHA512_CTX));
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}
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void pbkdf2_hmac_sha512(const uint8_t *pass, int passlen, const uint8_t *salt, int saltlen, uint32_t iterations, uint8_t *key)
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{
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PBKDF2_HMAC_SHA512_CTX pctx;
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pbkdf2_hmac_sha512_Init(&pctx, pass, passlen, salt, saltlen);
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pbkdf2_hmac_sha512_Update(&pctx, iterations);
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pbkdf2_hmac_sha512_Final(&pctx, key);
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}
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