Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170103-1' into staging
[qemu.git] / crypto / random-gnutls.c
1 /*
2 * QEMU Crypto random number provider
3 *
4 * Copyright (c) 2015-2016 Red Hat, Inc.
5 *
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 of the License, or (at your option) any later version.
10 *
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.
15 *
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/>.
18 *
19 */
20
21 #include "qemu/osdep.h"
22
23 #include "crypto/random.h"
24
25 #include <gnutls/gnutls.h>
26 #include <gnutls/crypto.h>
27
28 int qcrypto_random_bytes(uint8_t *buf,
29 size_t buflen,
30 Error **errp)
31 {
32 int ret;
33
34 ret = gnutls_rnd(GNUTLS_RND_RANDOM, buf, buflen);
35
36 if (ret < 0) {
37 error_setg(errp, "Cannot get random bytes: %s",
38 gnutls_strerror(ret));
39 return -1;
40 }
41
42 return 0;
43 }