xref: /openbmc/qemu/crypto/random-gnutls.c (revision 4a09d0bb)
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 }
44