mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
105 lines
3 KiB
C
105 lines
3 KiB
C
![]() |
/*
|
||
|
* QEMU Crypto hash algorithms
|
||
|
*
|
||
|
* Copyright (c) 2021 Red Hat, Inc.
|
||
|
*
|
||
|
* This library is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
* License as published by the Free Software Foundation; either
|
||
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
*
|
||
|
* This library 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
|
||
|
* Lesser General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#include "qemu/osdep.h"
|
||
|
#include <gnutls/crypto.h>
|
||
|
#include "qapi/error.h"
|
||
|
#include "crypto/hash.h"
|
||
|
#include "hashpriv.h"
|
||
|
|
||
|
|
||
|
static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG__MAX] = {
|
||
|
[QCRYPTO_HASH_ALG_MD5] = GNUTLS_DIG_MD5,
|
||
|
[QCRYPTO_HASH_ALG_SHA1] = GNUTLS_DIG_SHA1,
|
||
|
[QCRYPTO_HASH_ALG_SHA224] = GNUTLS_DIG_SHA224,
|
||
|
[QCRYPTO_HASH_ALG_SHA256] = GNUTLS_DIG_SHA256,
|
||
|
[QCRYPTO_HASH_ALG_SHA384] = GNUTLS_DIG_SHA384,
|
||
|
[QCRYPTO_HASH_ALG_SHA512] = GNUTLS_DIG_SHA512,
|
||
|
[QCRYPTO_HASH_ALG_RIPEMD160] = GNUTLS_DIG_RMD160,
|
||
|
};
|
||
|
|
||
|
gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg)
|
||
|
{
|
||
|
size_t i;
|
||
|
const gnutls_digest_algorithm_t *algs;
|
||
|
if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map) ||
|
||
|
qcrypto_hash_alg_map[alg] == GNUTLS_DIG_UNKNOWN) {
|
||
|
return false;
|
||
|
}
|
||
|
algs = gnutls_digest_list();
|
||
|
for (i = 0; algs[i] != GNUTLS_DIG_UNKNOWN; i++) {
|
||
|
if (algs[i] == qcrypto_hash_alg_map[alg]) {
|
||
|
return true;
|
||
|
}
|
||
|
}
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int
|
||
|
qcrypto_gnutls_hash_bytesv(QCryptoHashAlgorithm alg,
|
||
|
const struct iovec *iov,
|
||
|
size_t niov,
|
||
|
uint8_t **result,
|
||
|
size_t *resultlen,
|
||
|
Error **errp)
|
||
|
{
|
||
|
int i, ret;
|
||
|
gnutls_hash_hd_t hash;
|
||
|
|
||
|
if (!qcrypto_hash_supports(alg)) {
|
||
|
error_setg(errp,
|
||
|
"Unknown hash algorithm %d",
|
||
|
alg);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
ret = gnutls_hash_get_len(qcrypto_hash_alg_map[alg]);
|
||
|
if (*resultlen == 0) {
|
||
|
*resultlen = ret;
|
||
|
*result = g_new0(uint8_t, *resultlen);
|
||
|
} else if (*resultlen != ret) {
|
||
|
error_setg(errp,
|
||
|
"Result buffer size %zu is smaller than hash %d",
|
||
|
*resultlen, ret);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
ret = gnutls_hash_init(&hash, qcrypto_hash_alg_map[alg]);
|
||
|
if (ret < 0) {
|
||
|
error_setg(errp,
|
||
|
"Unable to initialize hash algorithm: %s",
|
||
|
gnutls_strerror(ret));
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < niov; i++) {
|
||
|
gnutls_hash(hash, iov[i].iov_base, iov[i].iov_len);
|
||
|
}
|
||
|
|
||
|
gnutls_hash_deinit(hash, *result);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
QCryptoHashDriver qcrypto_hash_lib_driver = {
|
||
|
.hash_bytesv = qcrypto_gnutls_hash_bytesv,
|
||
|
};
|