1
0
mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-23 23:08:14 +00:00
trezor-firmware/pbkdf2.c

93 lines
3.2 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 "pbkdf2.h"
#include "hmac.h"
void pbkdf2_hmac_sha256(const uint8_t *pass, int passlen, uint8_t *salt, int saltlen, uint32_t iterations, uint8_t *key, int keylen, void (*progress_callback)(uint32_t current, uint32_t total))
{
const uint32_t HMACLEN = 256/8;
uint32_t i, j, k;
uint8_t f[HMACLEN], g[HMACLEN];
uint32_t blocks = keylen / HMACLEN;
if (keylen & (HMACLEN - 1)) {
blocks++;
}
for (i = 1; i <= blocks; i++) {
salt[saltlen ] = (i >> 24) & 0xFF;
salt[saltlen + 1] = (i >> 16) & 0xFF;
salt[saltlen + 2] = (i >> 8) & 0xFF;
salt[saltlen + 3] = i & 0xFF;
hmac_sha256(pass, passlen, salt, saltlen + 4, g);
memcpy(f, g, HMACLEN);
for (j = 1; j < iterations; j++) {
hmac_sha256(pass, passlen, g, HMACLEN, g);
for (k = 0; k < HMACLEN; k++) {
f[k] ^= g[k];
}
if (progress_callback && (j % 256 == 255)) {
progress_callback(j + 1, iterations);
}
}
if (i == blocks && (keylen & (HMACLEN - 1))) {
memcpy(key + HMACLEN * (i - 1), f, keylen & (HMACLEN - 1));
} else {
memcpy(key + HMACLEN * (i - 1), f, HMACLEN);
}
}
}
void pbkdf2_hmac_sha512(const uint8_t *pass, int passlen, uint8_t *salt, int saltlen, uint32_t iterations, uint8_t *key, int keylen, void (*progress_callback)(uint32_t current, uint32_t total))
{
const uint32_t HMACLEN = 512/8;
uint32_t i, j, k;
uint8_t f[HMACLEN], g[HMACLEN];
uint32_t blocks = keylen / HMACLEN;
if (keylen & (HMACLEN - 1)) {
blocks++;
}
for (i = 1; i <= blocks; i++) {
salt[saltlen ] = (i >> 24) & 0xFF;
salt[saltlen + 1] = (i >> 16) & 0xFF;
salt[saltlen + 2] = (i >> 8) & 0xFF;
salt[saltlen + 3] = i & 0xFF;
hmac_sha512(pass, passlen, salt, saltlen + 4, g);
memcpy(f, g, HMACLEN);
for (j = 1; j < iterations; j++) {
hmac_sha512(pass, passlen, g, HMACLEN, g);
for (k = 0; k < HMACLEN; k++) {
f[k] ^= g[k];
}
if (progress_callback && (j % 256 == 255)) {
progress_callback(j + 1, iterations);
}
}
if (i == blocks && (keylen & (HMACLEN - 1))) {
memcpy(key + HMACLEN * (i - 1), f, keylen & (HMACLEN - 1));
} else {
memcpy(key + HMACLEN * (i - 1), f, HMACLEN);
}
}
}