random-gnutls.c (1309B)
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 2.1 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 #include "qapi/error.h" 25 26 #include <gnutls/gnutls.h> 27 #include <gnutls/crypto.h> 28 29 int qcrypto_random_bytes(void *buf, 30 size_t buflen, 31 Error **errp) 32 { 33 int ret; 34 35 ret = gnutls_rnd(GNUTLS_RND_RANDOM, buf, buflen); 36 37 if (ret < 0) { 38 error_setg(errp, "Cannot get random bytes: %s", 39 gnutls_strerror(ret)); 40 return -1; 41 } 42 43 return 0; 44 } 45 46 47 int qcrypto_random_init(Error **errp G_GNUC_UNUSED) { return 0; }