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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2019 Eltan B.V.
*
* 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; version 2 of the License.
*
* 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.
*/
#include <cb_sha.h>
int cb_sha_endian(enum vb2_hash_algorithm hash_alg, const uint8_t *data, uint32_t len,
uint8_t *digest, enum endian_algorithm endian)
{
int i;
int rv;
uint32_t digest_size;
uint8_t *result_ptr;
uint8_t result[VB2_MAX_DIGEST_SIZE];
switch (hash_alg) {
case VB2_HASH_SHA1:
digest_size = VB2_SHA1_DIGEST_SIZE;
break;
case VB2_HASH_SHA256:
digest_size = VB2_SHA256_DIGEST_SIZE;
break;
case VB2_HASH_SHA512:
digest_size = VB2_SHA512_DIGEST_SIZE;
break;
default:
return VB2_ERROR_SHA_INIT_ALGORITHM;
}
result_ptr = result;
rv = vb2_digest_buffer(data, len, hash_alg, result_ptr, digest_size);
if (rv || (endian == NO_ENDIAN_ALGORITHM))
return rv;
for (i = 0; i < digest_size; ++i) {
if (endian == BIG_ENDIAN_ALGORITHM) {
/* use big endian */
digest[i] = *result_ptr++;
} else {
/* use little endian */
digest[digest_size - i - 1] = *result_ptr++;
}
}
return rv;
}
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