LXR qemu/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
  28int 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