cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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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
     29int 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
     47int qcrypto_random_init(Error **errp G_GNUC_UNUSED) { return 0; }