LXR qemu/crypto/init.c

   1/*
   2 * QEMU Crypto initialization
   3 *
   4 * Copyright (c) 2015 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#include "crypto/init.h"
  23#include "qapi/error.h"
  24#include "qemu/thread.h"
  25
  26#ifdef CONFIG_GNUTLS
  27#include <gnutls/gnutls.h>
  28#include <gnutls/crypto.h>
  29#endif
  30
  31#ifdef CONFIG_GCRYPT
  32#include <gcrypt.h>
  33#endif
  34
  35#include "crypto/random.h"
  36
  37/* #define DEBUG_GNUTLS */
  38#ifdef DEBUG_GNUTLS
  39static void qcrypto_gnutls_log(int level, const char *str)
  40{
  41    fprintf(stderr, "%d: %s", level, str);
  42}
  43#endif
  44
  45int qcrypto_init(Error **errp)
  46{
  47#ifdef CONFIG_GNUTLS
  48    int ret;
  49    ret = gnutls_global_init();
  50    if (ret < 0) {
  51        error_setg(errp,
  52                   "Unable to initialize GNUTLS library: %s",
  53                   gnutls_strerror(ret));
  54        return -1;
  55    }
  56#ifdef DEBUG_GNUTLS
  57    gnutls_global_set_log_level(10);
  58    gnutls_global_set_log_function(qcrypto_gnutls_log);
  59#endif
  60#endif
  61
  62#ifdef CONFIG_GCRYPT
  63    if (!gcry_check_version(NULL)) {
  64        error_setg(errp, "Unable to initialize gcrypt");
  65        return -1;
  66    }
  67    gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
  68#endif
  69
  70    if (qcrypto_random_init(errp) < 0) {
  71        return -1;
  72    }
  73
  74    return 0;
  75}
  76