qxl: check release info object
[qemu.git] / 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 "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
39 /*
40 * We need to init gcrypt threading if
41 *
42 * - gcrypt < 1.6.0
43 *
44 */
45
46 #if (defined(CONFIG_GCRYPT) && \
47 (GCRYPT_VERSION_NUMBER < 0x010600))
48 #define QCRYPTO_INIT_GCRYPT_THREADS
49 #else
50 #undef QCRYPTO_INIT_GCRYPT_THREADS
51 #endif
52
53 #ifdef DEBUG_GNUTLS
54 static void qcrypto_gnutls_log(int level, const char *str)
55 {
56 fprintf(stderr, "%d: %s", level, str);
57 }
58 #endif
59
60 #ifdef QCRYPTO_INIT_GCRYPT_THREADS
61 static int qcrypto_gcrypt_mutex_init(void **priv)
62 { \
63 QemuMutex *lock = NULL;
64 lock = g_new0(QemuMutex, 1);
65 qemu_mutex_init(lock);
66 *priv = lock;
67 return 0;
68 }
69
70 static int qcrypto_gcrypt_mutex_destroy(void **priv)
71 {
72 QemuMutex *lock = *priv;
73 qemu_mutex_destroy(lock);
74 g_free(lock);
75 return 0;
76 }
77
78 static int qcrypto_gcrypt_mutex_lock(void **priv)
79 {
80 QemuMutex *lock = *priv;
81 qemu_mutex_lock(lock);
82 return 0;
83 }
84
85 static int qcrypto_gcrypt_mutex_unlock(void **priv)
86 {
87 QemuMutex *lock = *priv;
88 qemu_mutex_unlock(lock);
89 return 0;
90 }
91
92 static struct gcry_thread_cbs qcrypto_gcrypt_thread_impl = {
93 (GCRY_THREAD_OPTION_PTHREAD | (GCRY_THREAD_OPTION_VERSION << 8)),
94 NULL,
95 qcrypto_gcrypt_mutex_init,
96 qcrypto_gcrypt_mutex_destroy,
97 qcrypto_gcrypt_mutex_lock,
98 qcrypto_gcrypt_mutex_unlock,
99 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
100 };
101 #endif /* QCRYPTO_INIT_GCRYPT */
102
103 int qcrypto_init(Error **errp)
104 {
105 #ifdef QCRYPTO_INIT_GCRYPT_THREADS
106 gcry_control(GCRYCTL_SET_THREAD_CBS, &qcrypto_gcrypt_thread_impl);
107 #endif /* QCRYPTO_INIT_GCRYPT_THREADS */
108
109 #ifdef CONFIG_GNUTLS
110 int ret;
111 ret = gnutls_global_init();
112 if (ret < 0) {
113 error_setg(errp,
114 "Unable to initialize GNUTLS library: %s",
115 gnutls_strerror(ret));
116 return -1;
117 }
118 #ifdef DEBUG_GNUTLS
119 gnutls_global_set_log_level(10);
120 gnutls_global_set_log_function(qcrypto_gnutls_log);
121 #endif
122 #endif
123
124 #ifdef CONFIG_GCRYPT
125 if (!gcry_check_version(GCRYPT_VERSION)) {
126 error_setg(errp, "Unable to initialize gcrypt");
127 return -1;
128 }
129 gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
130 #endif
131
132 if (qcrypto_random_init(errp) < 0) {
133 return -1;
134 }
135
136 return 0;
137 }