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
  39 static void qcrypto_gnutls_log(int level, const char *str)
  40 {
  41     fprintf(stderr, "%d: %s", level, str);
  42 }
  43 #endif
  44
  45 int 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 }