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, see
17 * <http://www.gnu.org/licenses/>.
25 #include <gnutls/gnutls.h>
31 #include "gtlsbackend-gnutls.h"
32 #include "gtlscertificate-gnutls.h"
33 #include "gtlsclientconnection-gnutls.h"
34 #include "gtlsfiledatabase-gnutls.h"
35 #include "gtlsserverconnection-gnutls.h"
37 struct _GTlsBackendGnutlsPrivate
40 GTlsDatabase *default_database;
43 static void g_tls_backend_gnutls_interface_init (GTlsBackendInterface *iface);
45 G_DEFINE_DYNAMIC_TYPE_EXTENDED (GTlsBackendGnutls, g_tls_backend_gnutls, G_TYPE_OBJECT, 0,
46 G_IMPLEMENT_INTERFACE_DYNAMIC (G_TYPE_TLS_BACKEND,
47 g_tls_backend_gnutls_interface_init);)
49 #if defined(GCRY_THREAD_OPTION_PTHREAD_IMPL) && !defined(G_OS_WIN32)
50 GCRY_THREAD_OPTION_PTHREAD_IMPL;
56 gtls_gcry_win32_mutex_init (void **priv)
59 CRITICAL_SECTION *lock = (CRITICAL_SECTION*)malloc (sizeof (CRITICAL_SECTION));
64 InitializeCriticalSection (lock);
71 gtls_gcry_win32_mutex_destroy (void **lock)
73 DeleteCriticalSection ((CRITICAL_SECTION*)*lock);
79 gtls_gcry_win32_mutex_lock (void **lock)
81 EnterCriticalSection ((CRITICAL_SECTION*)*lock);
86 gtls_gcry_win32_mutex_unlock (void **lock)
88 LeaveCriticalSection ((CRITICAL_SECTION*)*lock);
93 static struct gcry_thread_cbs gtls_gcry_threads_win32 = { \
94 (GCRY_THREAD_OPTION_USER | (GCRY_THREAD_OPTION_VERSION << 8)), \
95 NULL, gtls_gcry_win32_mutex_init, gtls_gcry_win32_mutex_destroy, \
96 gtls_gcry_win32_mutex_lock, gtls_gcry_win32_mutex_unlock, \
97 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
102 gtls_gnutls_init (gpointer data)
104 #if defined(GCRY_THREAD_OPTION_PTHREAD_IMPL) && !defined(G_OS_WIN32)
105 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
106 #elif defined(G_OS_WIN32)
107 gcry_control (GCRYCTL_SET_THREAD_CBS, >ls_gcry_threads_win32);
109 gnutls_global_init ();
111 /* Leak the module to keep it from being unloaded. */
112 g_type_plugin_use (g_type_get_plugin (G_TYPE_TLS_BACKEND_GNUTLS));
116 static GOnce gnutls_inited = G_ONCE_INIT;
119 g_tls_backend_gnutls_init (GTlsBackendGnutls *backend)
121 /* Once we call gtls_gnutls_init(), we can't allow the module to be
122 * unloaded, since that would break the pointers to the mutex
123 * functions we set for gcrypt. So we initialize it from here rather
124 * than at class init time so that it doesn't happen unless the app
125 * is actually using TLS (as opposed to just calling
126 * g_io_modules_scan_all_in_directory()).
128 g_once (&gnutls_inited, gtls_gnutls_init, NULL);
130 backend->priv = G_TYPE_INSTANCE_GET_PRIVATE (backend, G_TYPE_TLS_BACKEND_GNUTLS, GTlsBackendGnutlsPrivate);
131 backend->priv->mutex = g_mutex_new ();
135 g_tls_backend_gnutls_finalize (GObject *object)
137 GTlsBackendGnutls *backend = G_TLS_BACKEND_GNUTLS (object);
139 if (backend->priv->default_database)
140 g_object_unref (backend->priv->default_database);
141 g_mutex_free (backend->priv->mutex);
143 G_OBJECT_CLASS (g_tls_backend_gnutls_parent_class)->finalize (object);
147 g_tls_backend_gnutls_class_init (GTlsBackendGnutlsClass *backend_class)
149 GObjectClass *gobject_class = G_OBJECT_CLASS (backend_class);
150 gobject_class->finalize = g_tls_backend_gnutls_finalize;
151 g_type_class_add_private (backend_class, sizeof (GTlsBackendGnutlsPrivate));
155 g_tls_backend_gnutls_class_finalize (GTlsBackendGnutlsClass *backend_class)
160 g_tls_backend_gnutls_get_default_database (GTlsBackend *backend)
162 GTlsBackendGnutls *self = G_TLS_BACKEND_GNUTLS (backend);
163 const gchar *anchor_file = NULL;
164 GTlsDatabase *result;
165 GError *error = NULL;
167 g_mutex_lock (self->priv->mutex);
169 if (self->priv->default_database)
171 result = g_object_ref (self->priv->default_database);
175 #ifdef GTLS_SYSTEM_CA_FILE
176 anchor_file = GTLS_SYSTEM_CA_FILE;
178 result = g_tls_file_database_new (anchor_file, &error);
181 g_warning ("couldn't load TLS file database: %s",
183 g_clear_error (&error);
187 self->priv->default_database = g_object_ref (result);
191 g_mutex_unlock (self->priv->mutex);
197 g_tls_backend_gnutls_interface_init (GTlsBackendInterface *iface)
199 iface->get_certificate_type = g_tls_certificate_gnutls_get_type;
200 iface->get_client_connection_type = g_tls_client_connection_gnutls_get_type;
201 iface->get_server_connection_type = g_tls_server_connection_gnutls_get_type;
202 iface->get_file_database_type = g_tls_file_database_gnutls_get_type;
203 iface->get_default_database = g_tls_backend_gnutls_get_default_database;
206 /* Session cache support; all the details are sort of arbitrary. Note
207 * that having session_cache_cleanup() be a little bit slow isn't the
208 * end of the world, since it will still be faster than the network
209 * is. (NSS uses a linked list for its cache...)
212 G_LOCK_DEFINE_STATIC (session_cache_lock);
213 GHashTable *session_cache;
215 #define SESSION_CACHE_MAX_SIZE 50
216 #define SESSION_CACHE_MAX_AGE (60 * 60) /* one hour */
220 GByteArray *session_data;
222 } GTlsBackendGnutlsCacheData;
225 session_cache_cleanup (void)
229 GTlsBackendGnutlsCacheData *cache_data;
230 time_t expired = time (NULL) - SESSION_CACHE_MAX_AGE;
232 g_hash_table_iter_init (&iter, session_cache);
233 while (g_hash_table_iter_next (&iter, &key, &value))
236 if (cache_data->last_used < expired)
237 g_hash_table_iter_remove (&iter);
242 cache_data_free (gpointer data)
244 GTlsBackendGnutlsCacheData *cache_data = data;
246 g_free (cache_data->session_id);
247 g_byte_array_unref (cache_data->session_data);
248 g_slice_free (GTlsBackendGnutlsCacheData, cache_data);
252 g_tls_backend_gnutls_cache_session_data (const gchar *session_id,
253 guchar *session_data,
254 gsize session_data_length)
256 GTlsBackendGnutlsCacheData *cache_data;
258 G_LOCK (session_cache_lock);
261 session_cache = g_hash_table_new_full (g_str_hash, g_str_equal,
262 NULL, cache_data_free);
264 cache_data = g_hash_table_lookup (session_cache, session_id);
267 if (cache_data->session_data->len == session_data_length &&
268 memcmp (cache_data->session_data->data,
269 session_data, session_data_length) == 0)
271 cache_data->last_used = time (NULL);
272 G_UNLOCK (session_cache_lock);
276 g_byte_array_set_size (cache_data->session_data, 0);
280 if (g_hash_table_size (session_cache) >= SESSION_CACHE_MAX_SIZE)
281 session_cache_cleanup ();
283 cache_data = g_slice_new (GTlsBackendGnutlsCacheData);
284 cache_data->session_id = g_strdup (session_id);
285 cache_data->session_data = g_byte_array_sized_new (session_data_length);
287 g_hash_table_insert (session_cache, cache_data->session_id, cache_data);
290 g_byte_array_append (cache_data->session_data,
291 session_data, session_data_length);
292 cache_data->last_used = time (NULL);
293 G_UNLOCK (session_cache_lock);
297 g_tls_backend_gnutls_uncache_session_data (const gchar *session_id)
299 G_LOCK (session_cache_lock);
301 g_hash_table_remove (session_cache, session_id);
302 G_UNLOCK (session_cache_lock);
306 g_tls_backend_gnutls_lookup_session_data (const gchar *session_id)
308 GTlsBackendGnutlsCacheData *cache_data;
309 GByteArray *session_data = NULL;
311 G_LOCK (session_cache_lock);
314 cache_data = g_hash_table_lookup (session_cache, session_id);
317 cache_data->last_used = time (NULL);
318 session_data = g_byte_array_ref (cache_data->session_data);
321 G_UNLOCK (session_cache_lock);
327 g_tls_backend_gnutls_register (GIOModule *module)
329 g_tls_backend_gnutls_register_type (G_TYPE_MODULE (module));
330 g_io_extension_point_implement (G_TLS_BACKEND_EXTENSION_POINT_NAME,
331 g_tls_backend_gnutls_get_type(),