2 * QEMU Crypto hash algorithms
4 * Copyright (c) 2021 Red Hat, Inc.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include <gnutls/crypto.h>
23 #include "qapi/error.h"
24 #include "crypto/hash.h"
28 static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG__MAX] = {
29 [QCRYPTO_HASH_ALG_MD5] = GNUTLS_DIG_MD5,
30 [QCRYPTO_HASH_ALG_SHA1] = GNUTLS_DIG_SHA1,
31 [QCRYPTO_HASH_ALG_SHA224] = GNUTLS_DIG_SHA224,
32 [QCRYPTO_HASH_ALG_SHA256] = GNUTLS_DIG_SHA256,
33 [QCRYPTO_HASH_ALG_SHA384] = GNUTLS_DIG_SHA384,
34 [QCRYPTO_HASH_ALG_SHA512] = GNUTLS_DIG_SHA512,
35 [QCRYPTO_HASH_ALG_RIPEMD160] = GNUTLS_DIG_RMD160,
38 gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg)
41 const gnutls_digest_algorithm_t *algs;
42 if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_map) ||
43 qcrypto_hash_alg_map[alg] == GNUTLS_DIG_UNKNOWN) {
46 algs = gnutls_digest_list();
47 for (i = 0; algs[i] != GNUTLS_DIG_UNKNOWN; i++) {
48 if (algs[i] == qcrypto_hash_alg_map[alg]) {
57 qcrypto_gnutls_hash_bytesv(QCryptoHashAlgorithm alg,
58 const struct iovec *iov,
65 gnutls_hash_hd_t hash;
67 if (!qcrypto_hash_supports(alg)) {
69 "Unknown hash algorithm %d",
74 ret = gnutls_hash_get_len(qcrypto_hash_alg_map[alg]);
75 if (*resultlen == 0) {
77 *result = g_new0(uint8_t, *resultlen);
78 } else if (*resultlen != ret) {
80 "Result buffer size %zu is smaller than hash %d",
85 ret = gnutls_hash_init(&hash, qcrypto_hash_alg_map[alg]);
88 "Unable to initialize hash algorithm: %s",
89 gnutls_strerror(ret));
93 for (i = 0; i < niov; i++) {
94 gnutls_hash(hash, iov[i].iov_base, iov[i].iov_len);
97 gnutls_hash_deinit(hash, *result);
102 QCryptoHashDriver qcrypto_hash_lib_driver = {
103 .hash_bytesv = qcrypto_gnutls_hash_bytesv,