1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright © 2010 Red Hat, Inc
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
26 #include <gnutls/gnutls.h>
32 #include "gtlsbackend-gnutls.h"
33 #include "gtlscertificate-gnutls.h"
34 #include "gtlsclientconnection-gnutls.h"
35 #include "gtlsfiledatabase-gnutls.h"
36 #include "gtlsserverconnection-gnutls.h"
38 struct _GTlsBackendGnutlsPrivate
41 GTlsDatabase *default_database;
44 static void g_tls_backend_gnutls_interface_init (GTlsBackendInterface *iface);
46 G_DEFINE_DYNAMIC_TYPE_EXTENDED (GTlsBackendGnutls, g_tls_backend_gnutls, G_TYPE_OBJECT, 0,
47 G_IMPLEMENT_INTERFACE_DYNAMIC (G_TYPE_TLS_BACKEND,
48 g_tls_backend_gnutls_interface_init);)
50 #if defined(GCRY_THREAD_OPTION_PTHREAD_IMPL) && !defined(G_OS_WIN32)
51 GCRY_THREAD_OPTION_PTHREAD_IMPL;
57 gtls_gcry_win32_mutex_init (void **priv)
60 CRITICAL_SECTION *lock = (CRITICAL_SECTION*)malloc (sizeof (CRITICAL_SECTION));
65 InitializeCriticalSection (lock);
72 gtls_gcry_win32_mutex_destroy (void **lock)
74 DeleteCriticalSection ((CRITICAL_SECTION*)*lock);
80 gtls_gcry_win32_mutex_lock (void **lock)
82 EnterCriticalSection ((CRITICAL_SECTION*)*lock);
87 gtls_gcry_win32_mutex_unlock (void **lock)
89 LeaveCriticalSection ((CRITICAL_SECTION*)*lock);
94 static struct gcry_thread_cbs gtls_gcry_threads_win32 = { \
95 (GCRY_THREAD_OPTION_USER | (GCRY_THREAD_OPTION_VERSION << 8)), \
96 NULL, gtls_gcry_win32_mutex_init, gtls_gcry_win32_mutex_destroy, \
97 gtls_gcry_win32_mutex_lock, gtls_gcry_win32_mutex_unlock, \
98 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
103 gtls_gnutls_init (gpointer data)
105 #if defined(GCRY_THREAD_OPTION_PTHREAD_IMPL) && !defined(G_OS_WIN32)
106 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
107 #elif defined(G_OS_WIN32)
108 gcry_control (GCRYCTL_SET_THREAD_CBS, >ls_gcry_threads_win32);
110 gnutls_global_init ();
112 /* Leak the module to keep it from being unloaded. */
113 g_type_plugin_use (g_type_get_plugin (G_TYPE_TLS_BACKEND_GNUTLS));
117 static GOnce gnutls_inited = G_ONCE_INIT;
120 g_tls_backend_gnutls_init (GTlsBackendGnutls *backend)
122 /* Once we call gtls_gnutls_init(), we can't allow the module to be
123 * unloaded, since that would break the pointers to the mutex
124 * functions we set for gcrypt. So we initialize it from here rather
125 * than at class init time so that it doesn't happen unless the app
126 * is actually using TLS (as opposed to just calling
127 * g_io_modules_scan_all_in_directory()).
129 g_once (&gnutls_inited, gtls_gnutls_init, NULL);
131 backend->priv = G_TYPE_INSTANCE_GET_PRIVATE (backend, G_TYPE_TLS_BACKEND_GNUTLS, GTlsBackendGnutlsPrivate);
132 backend->priv->mutex = g_mutex_new ();
136 g_tls_backend_gnutls_finalize (GObject *object)
138 GTlsBackendGnutls *backend = G_TLS_BACKEND_GNUTLS (object);
140 if (backend->priv->default_database)
141 g_object_unref (backend->priv->default_database);
142 g_mutex_free (backend->priv->mutex);
144 G_OBJECT_CLASS (g_tls_backend_gnutls_parent_class)->finalize (object);
148 g_tls_backend_gnutls_class_init (GTlsBackendGnutlsClass *backend_class)
150 GObjectClass *gobject_class = G_OBJECT_CLASS (backend_class);
151 gobject_class->finalize = g_tls_backend_gnutls_finalize;
152 g_type_class_add_private (backend_class, sizeof (GTlsBackendGnutlsPrivate));
156 g_tls_backend_gnutls_class_finalize (GTlsBackendGnutlsClass *backend_class)
161 g_tls_backend_gnutls_get_default_database (GTlsBackend *backend)
163 GTlsBackendGnutls *self = G_TLS_BACKEND_GNUTLS (backend);
164 const gchar *anchor_file = NULL;
165 GTlsDatabase *result;
166 GError *error = NULL;
168 g_mutex_lock (self->priv->mutex);
170 if (self->priv->default_database)
172 result = g_object_ref (self->priv->default_database);
176 #ifdef GTLS_SYSTEM_CA_FILE
177 anchor_file = GTLS_SYSTEM_CA_FILE;
179 result = g_tls_file_database_new (anchor_file, &error);
182 g_warning ("couldn't load TLS file database: %s",
184 g_clear_error (&error);
188 self->priv->default_database = g_object_ref (result);
192 g_mutex_unlock (self->priv->mutex);
198 g_tls_backend_gnutls_interface_init (GTlsBackendInterface *iface)
200 iface->get_certificate_type = g_tls_certificate_gnutls_get_type;
201 iface->get_client_connection_type = g_tls_client_connection_gnutls_get_type;
202 iface->get_server_connection_type = g_tls_server_connection_gnutls_get_type;
203 iface->get_file_database_type = g_tls_file_database_gnutls_get_type;
204 iface->get_default_database = g_tls_backend_gnutls_get_default_database;
207 /* Session cache support; all the details are sort of arbitrary. Note
208 * that having session_cache_cleanup() be a little bit slow isn't the
209 * end of the world, since it will still be faster than the network
210 * is. (NSS uses a linked list for its cache...)
213 G_LOCK_DEFINE_STATIC (session_cache_lock);
214 GHashTable *session_cache;
216 #define SESSION_CACHE_MAX_SIZE 50
217 #define SESSION_CACHE_MAX_AGE (60 * 60) /* one hour */
221 GByteArray *session_data;
223 } GTlsBackendGnutlsCacheData;
226 session_cache_cleanup (void)
230 GTlsBackendGnutlsCacheData *cache_data;
231 time_t expired = time (NULL) - SESSION_CACHE_MAX_AGE;
233 g_hash_table_iter_init (&iter, session_cache);
234 while (g_hash_table_iter_next (&iter, &key, &value))
237 if (cache_data->last_used < expired)
238 g_hash_table_iter_remove (&iter);
243 cache_data_free (gpointer data)
245 GTlsBackendGnutlsCacheData *cache_data = data;
247 g_free (cache_data->session_id);
248 g_byte_array_unref (cache_data->session_data);
249 g_slice_free (GTlsBackendGnutlsCacheData, cache_data);
253 g_tls_backend_gnutls_cache_session_data (const gchar *session_id,
254 guchar *session_data,
255 gsize session_data_length)
257 GTlsBackendGnutlsCacheData *cache_data;
259 G_LOCK (session_cache_lock);
262 session_cache = g_hash_table_new_full (g_str_hash, g_str_equal,
263 NULL, cache_data_free);
265 cache_data = g_hash_table_lookup (session_cache, session_id);
268 if (cache_data->session_data->len == session_data_length &&
269 memcmp (cache_data->session_data->data,
270 session_data, session_data_length) == 0)
272 cache_data->last_used = time (NULL);
273 G_UNLOCK (session_cache_lock);
277 g_byte_array_set_size (cache_data->session_data, 0);
281 if (g_hash_table_size (session_cache) >= SESSION_CACHE_MAX_SIZE)
282 session_cache_cleanup ();
284 cache_data = g_slice_new (GTlsBackendGnutlsCacheData);
285 cache_data->session_id = g_strdup (session_id);
286 cache_data->session_data = g_byte_array_sized_new (session_data_length);
288 g_hash_table_insert (session_cache, cache_data->session_id, cache_data);
291 g_byte_array_append (cache_data->session_data,
292 session_data, session_data_length);
293 cache_data->last_used = time (NULL);
294 G_UNLOCK (session_cache_lock);
298 g_tls_backend_gnutls_uncache_session_data (const gchar *session_id)
300 G_LOCK (session_cache_lock);
302 g_hash_table_remove (session_cache, session_id);
303 G_UNLOCK (session_cache_lock);
307 g_tls_backend_gnutls_lookup_session_data (const gchar *session_id)
309 GTlsBackendGnutlsCacheData *cache_data;
310 GByteArray *session_data = NULL;
312 G_LOCK (session_cache_lock);
315 cache_data = g_hash_table_lookup (session_cache, session_id);
318 cache_data->last_used = time (NULL);
319 session_data = g_byte_array_ref (cache_data->session_data);
322 G_UNLOCK (session_cache_lock);
328 g_tls_backend_gnutls_register (GIOModule *module)
330 g_tls_backend_gnutls_register_type (G_TYPE_MODULE (module));
331 g_io_extension_point_implement (G_TLS_BACKEND_EXTENSION_POINT_NAME,
332 g_tls_backend_gnutls_get_type(),