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 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 "crypto/init.h"
  22
  23 #ifdef CONFIG_GNUTLS
  24 #include <gnutls/gnutls.h>
  25 #include <gnutls/crypto.h>
  26
  27 /* #define DEBUG_GNUTLS */
  28
  29 #ifdef DEBUG_GNUTLS
  30 static void qcrypto_gnutls_log(int level, const char *str)
  31 {
  32     fprintf(stderr, "%d: %s", level, str);
  33 }
  34 #endif
  35
  36 int qcrypto_init(Error **errp)
  37 {
  38     int ret;
  39     ret = gnutls_global_init();
  40     if (ret < 0) {
  41         error_setg(errp,
  42                    "Unable to initialize GNUTLS library: %s",
  43                    gnutls_strerror(ret));
  44         return -1;
  45     }
  46 #ifdef DEBUG_GNUTLS
  47     gnutls_global_set_log_level(10);
  48     gnutls_global_set_log_function(qcrypto_gnutls_log);
  49 #endif
  50     return 0;
  51 }
  52
  53 #else /* ! CONFIG_GNUTLS */
  54
  55 int qcrypto_init(Error **errp G_GNUC_UNUSED)
  56 {
  57     return 0;
  58 }
  59
  60 #endif /* ! CONFIG_GNUTLS */