tls/gnutls/gtlsconnection-gnutls.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright © 2009 Red Hat, Inc
   4  *
   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.
   9  *
  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.
  14  *
  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.
  19  */
  20
  21 #include "config.h"
  22 #include "glib.h"
  23
  24 #include <errno.h>
  25 #include <gnutls/gnutls.h>
  26 #include <gnutls/x509.h>
  27
  28 #include "gtlsconnection-gnutls.h"
  29 #include "gtlsbackend-gnutls.h"
  30 #include "gtlscertificate-gnutls.h"
  31 #include "gtlsinputstream-gnutls.h"
  32 #include "gtlsoutputstream-gnutls.h"
  33 #include "gtlsserverconnection-gnutls.h"
  34 #include "gnutls-marshal.h"
  35 #include <glib/gi18n-lib.h>
  36
  37 static void g_tls_connection_gnutls_get_property (GObject    *object,
  38                                                   guint       prop_id,
  39                                                   GValue     *value,
  40                                                   GParamSpec *pspec);
  41 static void g_tls_connection_gnutls_set_property (GObject      *object,
  42                                                   guint         prop_id,
  43                                                   const GValue *value,
  44                                                   GParamSpec   *pspec);
  45 static void g_tls_connection_gnutls_finalize     (GObject      *object);
  46
  47 static gboolean     g_tls_connection_gnutls_handshake        (GTlsConnection       *connection,
  48                                                               GCancellable         *cancellable,
  49                                                               GError              **error);
  50 static void         g_tls_connection_gnutls_handshake_async  (GTlsConnection       *conn,
  51                                                               int                   io_priority,
  52                                                               GCancellable         *cancellable,
  53                                                               GAsyncReadyCallback   callback,
  54                                                               gpointer              user_data);
  55 static gboolean     g_tls_connection_gnutls_handshake_finish (GTlsConnection       *conn,
  56                                                               GAsyncResult         *result,
  57                                                               GError              **error);
  58
  59 static GInputStream  *g_tls_connection_gnutls_get_input_stream  (GIOStream *stream);
  60 static GOutputStream *g_tls_connection_gnutls_get_output_stream (GIOStream *stream);
  61
  62 static gboolean     g_tls_connection_gnutls_close        (GIOStream           *stream,
  63                                                           GCancellable        *cancellable,
  64                                                           GError             **error);
  65 static void         g_tls_connection_gnutls_close_async  (GIOStream           *stream,
  66                                                           int                  io_priority,
  67                                                           GCancellable        *cancellable,
  68                                                           GAsyncReadyCallback  callback,
  69                                                           gpointer             user_data);
  70 static gboolean     g_tls_connection_gnutls_close_finish (GIOStream           *stream,
  71                                                           GAsyncResult        *result,
  72                                                           GError             **error);
  73
  74 static ssize_t g_tls_connection_gnutls_push_func (gnutls_transport_ptr_t  transport_data,
  75                                                   const void             *buf,
  76                                                   size_t                  buflen);
  77 static ssize_t g_tls_connection_gnutls_pull_func (gnutls_transport_ptr_t  transport_data,
  78                                                   void                   *buf,
  79                                                   size_t                  buflen);
  80
  81 static void     g_tls_connection_gnutls_initable_iface_init (GInitableIface  *iface);
  82 static gboolean g_tls_connection_gnutls_initable_init       (GInitable       *initable,
  83                                                              GCancellable    *cancellable,
  84                                                              GError         **error);
  85
  86 static void g_tls_connection_gnutls_init_priorities (void);
  87
  88 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GTlsConnectionGnutls, g_tls_connection_gnutls, G_TYPE_TLS_CONNECTION,
  89                                   G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
  90                                                          g_tls_connection_gnutls_initable_iface_init);
  91                                   g_tls_connection_gnutls_init_priorities ();
  92                                   );
  93
  94
  95 enum
  96 {
  97   PROP_0,
  98   PROP_BASE_IO_STREAM,
  99   PROP_REQUIRE_CLOSE_NOTIFY,
 100   PROP_REHANDSHAKE_MODE,
 101   PROP_USE_SYSTEM_CERTDB,
 102   PROP_CERTIFICATE,
 103   PROP_PEER_CERTIFICATE,
 104   PROP_PEER_CERTIFICATE_ERRORS
 105 };
 106
 107 struct _GTlsConnectionGnutlsPrivate
 108 {
 109   GIOStream *base_io_stream;
 110   GPollableInputStream *base_istream;
 111   GPollableOutputStream *base_ostream;
 112
 113   GList *ca_list;
 114   gnutls_certificate_credentials creds;
 115   gnutls_session session;
 116
 117   GTlsCertificate *certificate, *peer_certificate;
 118   GTlsCertificateFlags peer_certificate_errors;
 119   gboolean require_close_notify;
 120   GTlsRehandshakeMode rehandshake_mode;
 121   gboolean use_system_certdb;
 122   gboolean need_handshake, handshaking, ever_handshaked;
 123   gboolean closing;
 124
 125   GInputStream *tls_istream;
 126   GOutputStream *tls_ostream;
 127
 128   GError *error;
 129   GCancellable *cancellable;
 130   gboolean blocking, eof;
 131   GIOCondition internal_direction;
 132 };
 133
 134 static void
 135 g_tls_connection_gnutls_class_init (GTlsConnectionGnutlsClass *klass)
 136 {
 137   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 138   GTlsConnectionClass *connection_class = G_TLS_CONNECTION_CLASS (klass);
 139   GIOStreamClass *iostream_class = G_IO_STREAM_CLASS (klass);
 140
 141   g_type_class_add_private (klass, sizeof (GTlsConnectionGnutlsPrivate));
 142
 143   gobject_class->get_property = g_tls_connection_gnutls_get_property;
 144   gobject_class->set_property = g_tls_connection_gnutls_set_property;
 145   gobject_class->finalize     = g_tls_connection_gnutls_finalize;
 146
 147   connection_class->handshake        = g_tls_connection_gnutls_handshake;
 148   connection_class->handshake_async  = g_tls_connection_gnutls_handshake_async;
 149   connection_class->handshake_finish = g_tls_connection_gnutls_handshake_finish;
 150
 151   iostream_class->get_input_stream  = g_tls_connection_gnutls_get_input_stream;
 152   iostream_class->get_output_stream = g_tls_connection_gnutls_get_output_stream;
 153   iostream_class->close_fn          = g_tls_connection_gnutls_close;
 154   iostream_class->close_async       = g_tls_connection_gnutls_close_async;
 155   iostream_class->close_finish      = g_tls_connection_gnutls_close_finish;
 156
 157   g_object_class_override_property (gobject_class, PROP_BASE_IO_STREAM, "base-io-stream");
 158   g_object_class_override_property (gobject_class, PROP_REQUIRE_CLOSE_NOTIFY, "require-close-notify");
 159   g_object_class_override_property (gobject_class, PROP_REHANDSHAKE_MODE, "rehandshake-mode");
 160   g_object_class_override_property (gobject_class, PROP_USE_SYSTEM_CERTDB, "use-system-certdb");
 161   g_object_class_override_property (gobject_class, PROP_CERTIFICATE, "certificate");
 162   g_object_class_override_property (gobject_class, PROP_PEER_CERTIFICATE, "peer-certificate");
 163   g_object_class_override_property (gobject_class, PROP_PEER_CERTIFICATE_ERRORS, "peer-certificate-errors");
 164 }
 165
 166 static void
 167 g_tls_connection_gnutls_initable_iface_init (GInitableIface *iface)
 168 {
 169   iface->init = g_tls_connection_gnutls_initable_init;
 170 }
 171
 172 static void
 173 g_tls_connection_gnutls_init (GTlsConnectionGnutls *gnutls)
 174 {
 175   gnutls->priv = G_TYPE_INSTANCE_GET_PRIVATE (gnutls, G_TYPE_TLS_CONNECTION_GNUTLS, GTlsConnectionGnutlsPrivate);
 176
 177   gnutls_certificate_allocate_credentials (&gnutls->priv->creds);
 178   gnutls_certificate_set_verify_flags (gnutls->priv->creds,
 179                                        GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
 180
 181   gnutls->priv->need_handshake = TRUE;
 182 }
 183
 184 static gnutls_priority_t priorities[2][2];
 185
 186 static void
 187 g_tls_connection_gnutls_init_priorities (void)
 188 {
 189   /* First field is "ssl3 only", second is "allow unsafe rehandshaking" */
 190
 191   gnutls_priority_init (&priorities[FALSE][FALSE],
 192                         "NORMAL",
 193                         NULL);
 194   gnutls_priority_init (&priorities[TRUE][FALSE],
 195                         "NORMAL:!VERS-TLS1.2:!VERS-TLS1.1:!VERS-TLS1.0",
 196                         NULL);
 197   gnutls_priority_init (&priorities[FALSE][TRUE],
 198                         "NORMAL:%UNSAFE_RENEGOTIATION",
 199                         NULL);
 200   gnutls_priority_init (&priorities[TRUE][TRUE],
 201                         "NORMAL:!VERS-TLS1.2:!VERS-TLS1.1:!VERS-TLS1.0:%UNSAFE_RENEGOTIATION",
 202                         NULL);
 203 }
 204
 205 static void
 206 g_tls_connection_gnutls_set_handshake_priority (GTlsConnectionGnutls *gnutls)
 207 {
 208   gboolean use_ssl3, unsafe_rehandshake;
 209
 210   if (G_IS_TLS_CLIENT_CONNECTION (gnutls))
 211     use_ssl3 = g_tls_client_connection_get_use_ssl3 (G_TLS_CLIENT_CONNECTION (gnutls));
 212   else
 213     use_ssl3 = FALSE;
 214   unsafe_rehandshake = (gnutls->priv->rehandshake_mode == G_TLS_REHANDSHAKE_UNSAFELY);
 215   gnutls_priority_set (gnutls->priv->session,
 216                        priorities[use_ssl3][unsafe_rehandshake]);
 217 }
 218
 219 static gboolean
 220 g_tls_connection_gnutls_initable_init (GInitable     *initable,
 221                                        GCancellable  *cancellable,
 222                                        GError       **error)
 223 {
 224   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (initable);
 225   int status;
 226
 227   g_return_val_if_fail (gnutls->priv->base_istream != NULL &&
 228                         gnutls->priv->base_ostream != NULL, FALSE);
 229
 230   /* Make sure gnutls->priv->session has been initialized (it may have
 231    * already been initialized by a construct-time property setter).
 232    */
 233   g_tls_connection_gnutls_get_session (gnutls);
 234
 235   status = gnutls_credentials_set (gnutls->priv->session,
 236                                    GNUTLS_CRD_CERTIFICATE,
 237                                    gnutls->priv->creds);
 238   if (status != 0)
 239     {
 240       g_set_error (error, G_TLS_ERROR, G_TLS_ERROR_MISC,
 241                    _("Could not create TLS connection: %s"),
 242                    gnutls_strerror (status));
 243       return FALSE;
 244     }
 245
 246   gnutls_transport_set_push_function (gnutls->priv->session,
 247                                       g_tls_connection_gnutls_push_func);
 248   gnutls_transport_set_pull_function (gnutls->priv->session,
 249                                       g_tls_connection_gnutls_pull_func);
 250   gnutls_transport_set_ptr (gnutls->priv->session, gnutls);
 251
 252   gnutls->priv->tls_istream = g_tls_input_stream_gnutls_new (gnutls);
 253   gnutls->priv->tls_ostream = g_tls_output_stream_gnutls_new (gnutls);
 254
 255   return TRUE;
 256 }
 257
 258 static void
 259 g_tls_connection_gnutls_finalize (GObject *object)
 260 {
 261   GTlsConnectionGnutls *connection = G_TLS_CONNECTION_GNUTLS (object);
 262
 263   if (connection->priv->base_io_stream)
 264     g_object_unref (connection->priv->base_io_stream);
 265
 266   if (connection->priv->session)
 267     gnutls_deinit (connection->priv->session);
 268
 269   if (connection->priv->tls_istream)
 270     g_object_unref (connection->priv->tls_istream);
 271   if (connection->priv->tls_ostream)
 272     g_object_unref (connection->priv->tls_ostream);
 273
 274   if (connection->priv->creds)
 275     gnutls_certificate_free_credentials (connection->priv->creds);
 276
 277   if (connection->priv->certificate)
 278     g_object_unref (connection->priv->certificate);
 279   if (connection->priv->peer_certificate)
 280     g_object_unref (connection->priv->peer_certificate);
 281
 282   if (connection->priv->error)
 283     g_error_free (connection->priv->error);
 284
 285   G_OBJECT_CLASS (g_tls_connection_gnutls_parent_class)->finalize (object);
 286 }
 287
 288 static void
 289 g_tls_connection_gnutls_get_property (GObject    *object,
 290                                       guint       prop_id,
 291                                       GValue     *value,
 292                                       GParamSpec *pspec)
 293 {
 294   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (object);
 295
 296   switch (prop_id)
 297     {
 298     case PROP_BASE_IO_STREAM:
 299       g_value_set_object (value, gnutls->priv->base_io_stream);
 300       break;
 301
 302     case PROP_REQUIRE_CLOSE_NOTIFY:
 303       g_value_set_boolean (value, gnutls->priv->require_close_notify);
 304       break;
 305
 306     case PROP_REHANDSHAKE_MODE:
 307       g_value_set_enum (value, gnutls->priv->rehandshake_mode);
 308       break;
 309
 310     case PROP_USE_SYSTEM_CERTDB:
 311       g_value_set_boolean (value, gnutls->priv->use_system_certdb);
 312       break;
 313
 314     case PROP_CERTIFICATE:
 315       g_value_set_object (value, gnutls->priv->certificate);
 316       break;
 317
 318     case PROP_PEER_CERTIFICATE:
 319       g_value_set_object (value, gnutls->priv->peer_certificate);
 320       break;
 321
 322     case PROP_PEER_CERTIFICATE_ERRORS:
 323       g_value_set_flags (value, gnutls->priv->peer_certificate_errors);
 324       break;
 325
 326     default:
 327       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 328     }
 329 }
 330
 331 static void
 332 g_tls_connection_gnutls_set_property (GObject      *object,
 333                                       guint         prop_id,
 334                                       const GValue *value,
 335                                       GParamSpec   *pspec)
 336 {
 337   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (object);
 338   GInputStream *istream;
 339   GOutputStream *ostream;
 340
 341   switch (prop_id)
 342     {
 343     case PROP_BASE_IO_STREAM:
 344       if (gnutls->priv->base_io_stream)
 345         {
 346           g_object_unref (gnutls->priv->base_io_stream);
 347           gnutls->priv->base_istream = NULL;
 348           gnutls->priv->base_ostream = NULL;
 349         }
 350       gnutls->priv->base_io_stream = g_value_dup_object (value);
 351       if (!gnutls->priv->base_io_stream)
 352         return;
 353
 354       istream = g_io_stream_get_input_stream (gnutls->priv->base_io_stream);
 355       ostream = g_io_stream_get_output_stream (gnutls->priv->base_io_stream);
 356
 357       if (G_IS_POLLABLE_INPUT_STREAM (istream) &&
 358           g_pollable_input_stream_can_poll (G_POLLABLE_INPUT_STREAM (istream)))
 359         gnutls->priv->base_istream = G_POLLABLE_INPUT_STREAM (istream);
 360       if (G_IS_POLLABLE_OUTPUT_STREAM (ostream) &&
 361           g_pollable_output_stream_can_poll (G_POLLABLE_OUTPUT_STREAM (ostream)))
 362         gnutls->priv->base_ostream = G_POLLABLE_OUTPUT_STREAM (ostream);
 363       break;
 364
 365     case PROP_REQUIRE_CLOSE_NOTIFY:
 366       gnutls->priv->require_close_notify = g_value_get_boolean (value);
 367       break;
 368
 369     case PROP_REHANDSHAKE_MODE:
 370       gnutls->priv->rehandshake_mode = g_value_get_enum (value);
 371       break;
 372
 373     case PROP_USE_SYSTEM_CERTDB:
 374       gnutls->priv->use_system_certdb = g_value_get_boolean (value);
 375
 376       gnutls_certificate_free_cas (gnutls->priv->creds);
 377       if (gnutls->priv->use_system_certdb)
 378         {
 379           gnutls_x509_crt_t *cas;
 380           int num_cas;
 381
 382           g_tls_backend_gnutls_get_system_ca_list_gnutls (&cas, &num_cas);
 383           gnutls_certificate_set_x509_trust (gnutls->priv->creds, cas, num_cas);
 384         }
 385       break;
 386
 387     case PROP_CERTIFICATE:
 388       if (gnutls->priv->certificate)
 389         g_object_unref (gnutls->priv->certificate);
 390       gnutls->priv->certificate = g_value_dup_object (value);
 391       break;
 392
 393     default:
 394       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 395     }
 396 }
 397
 398 gnutls_certificate_credentials
 399 g_tls_connection_gnutls_get_credentials (GTlsConnectionGnutls *gnutls)
 400 {
 401   return gnutls->priv->creds;
 402 }
 403
 404 gnutls_session
 405 g_tls_connection_gnutls_get_session (GTlsConnectionGnutls *gnutls)
 406 {
 407   /* Ideally we would initialize gnutls->priv->session from
 408    * g_tls_connection_gnutls_init(), but we can't tell if it's a
 409    * client or server connection at that point... And
 410    * g_tls_connection_gnutls_initiable_init() is too late, because
 411    * construct-time property setters may need to modify it.
 412    */
 413   if (!gnutls->priv->session)
 414     {
 415       gboolean client = G_IS_TLS_CLIENT_CONNECTION (gnutls);
 416       gnutls_init (&gnutls->priv->session, client ? GNUTLS_CLIENT : GNUTLS_SERVER);
 417     }
 418
 419   return gnutls->priv->session;
 420 }
 421
 422 void
 423 g_tls_connection_gnutls_get_certificate (GTlsConnectionGnutls *gnutls,
 424                                          gnutls_retr_st       *st)
 425 {
 426   GTlsCertificate *cert;
 427
 428   cert = g_tls_connection_get_certificate (G_TLS_CONNECTION (gnutls));
 429
 430   st->type = GNUTLS_CRT_X509;
 431   if (cert)
 432     {
 433       GTlsCertificateGnutls *gnutlscert = G_TLS_CERTIFICATE_GNUTLS (cert);
 434
 435       st->ncerts = 1;
 436       st->cert.x509 = gnutls_malloc (sizeof (gnutls_x509_crt_t));
 437       st->cert.x509[0] = g_tls_certificate_gnutls_copy_cert (gnutlscert);
 438       st->key.x509 = g_tls_certificate_gnutls_copy_key (gnutlscert);
 439       st->deinit_all = TRUE;
 440     }
 441   else
 442     st->ncerts = 0;
 443 }
 444
 445 GTlsCertificateFlags
 446 g_tls_connection_gnutls_validate_peer (GTlsConnectionGnutls *gnutls)
 447 {
 448   int status;
 449
 450   status = gnutls_certificate_verify_peers (gnutls->priv->session);
 451   return g_tls_certificate_gnutls_convert_flags (status);
 452 }
 453
 454 static void
 455 begin_gnutls_io (GTlsConnectionGnutls  *gnutls,
 456                  gboolean               blocking,
 457                  GCancellable          *cancellable)
 458 {
 459   gnutls->priv->blocking = blocking;
 460   gnutls->priv->cancellable = cancellable;
 461   gnutls->priv->internal_direction = 0;
 462   g_clear_error (&gnutls->priv->error);
 463 }
 464
 465 static int
 466 end_gnutls_io (GTlsConnectionGnutls  *gnutls,
 467                int                    status,
 468                const char            *generic_error,
 469                GError               **error)
 470 {
 471   gnutls->priv->cancellable = NULL;
 472
 473   if (status >= 0)
 474     {
 475       g_clear_error (&gnutls->priv->error);
 476       return status;
 477     }
 478
 479   if (gnutls->priv->handshaking && !gnutls->priv->ever_handshaked)
 480     {
 481       if (g_error_matches (gnutls->priv->error, G_IO_ERROR, G_IO_ERROR_FAILED) ||
 482           status == GNUTLS_E_UNEXPECTED_PACKET_LENGTH ||
 483           status == GNUTLS_E_FATAL_ALERT_RECEIVED ||
 484           status == GNUTLS_E_UNSUPPORTED_VERSION_PACKET)
 485         {
 486           g_clear_error (&gnutls->priv->error);
 487           g_set_error_literal (error, G_TLS_ERROR, G_TLS_ERROR_NOT_TLS,
 488                                _("Peer failed to perform TLS handshake"));
 489           return GNUTLS_E_PULL_ERROR;
 490         }
 491     }
 492
 493   if (gnutls->priv->error)
 494     {
 495       if (g_error_matches (gnutls->priv->error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 496         status = GNUTLS_E_AGAIN;
 497       g_propagate_error (error, gnutls->priv->error);
 498       gnutls->priv->error = NULL;
 499       return status;
 500     }
 501   else if (status == GNUTLS_E_REHANDSHAKE)
 502     {
 503       if (gnutls->priv->rehandshake_mode == G_TLS_REHANDSHAKE_NEVER)
 504         {
 505           g_set_error_literal (error, G_TLS_ERROR, G_TLS_ERROR_MISC,
 506                                _("Peer requested illegal TLS rehandshake"));
 507           return GNUTLS_E_PULL_ERROR;
 508         }
 509
 510       gnutls->priv->need_handshake = TRUE;
 511       return status;
 512     }
 513   else if (status == GNUTLS_E_UNEXPECTED_PACKET_LENGTH)
 514     {
 515       if (gnutls->priv->eof)
 516         {
 517           if (gnutls->priv->require_close_notify)
 518             {
 519               g_set_error_literal (error, G_TLS_ERROR, G_TLS_ERROR_EOF,
 520                                    _("TLS connection closed unexpectedly"));
 521               return status;
 522             }
 523           else
 524             return 0;
 525         }
 526     }
 527
 528   g_set_error (error, G_TLS_ERROR, G_TLS_ERROR_MISC,
 529                generic_error, gnutls_strerror (status));
 530   return status;
 531 }
 532
 533 #define BEGIN_GNUTLS_IO(gnutls, blocking, cancellable)  \
 534   begin_gnutls_io (gnutls, blocking, cancellable);      \
 535   do {
 536
 537 #define END_GNUTLS_IO(gnutls, ret, errmsg, error)       \
 538   } while ((ret == GNUTLS_E_AGAIN ||                    \
 539             ret == GNUTLS_E_WARNING_ALERT_RECEIVED) &&  \
 540            !gnutls->priv->error);                       \
 541   ret = end_gnutls_io (gnutls, ret, errmsg, error)
 542
 543 gboolean
 544 g_tls_connection_gnutls_check (GTlsConnectionGnutls  *gnutls,
 545                                GIOCondition           condition)
 546 {
 547   if (gnutls->priv->handshaking || gnutls->priv->closing)
 548     condition = gnutls->priv->internal_direction;
 549
 550   if (condition & G_IO_IN)
 551     return g_pollable_input_stream_is_readable (gnutls->priv->base_istream);
 552   else
 553     return g_pollable_output_stream_is_writable (gnutls->priv->base_ostream);
 554 }
 555
 556 typedef struct {
 557   GSource source;
 558
 559   GTlsConnectionGnutls *gnutls;
 560   GObject              *stream;
 561
 562   GSource              *child_source;
 563   GIOCondition          base_direction;
 564   GIOCondition          current_direction;
 565 } GTlsConnectionGnutlsSource;
 566
 567 static gboolean
 568 gnutls_source_prepare (GSource *source,
 569                        gint    *timeout)
 570 {
 571   *timeout = -1;
 572   return FALSE;
 573 }
 574
 575 static gboolean
 576 gnutls_source_check (GSource *source)
 577 {
 578   return FALSE;
 579 }
 580
 581 static void
 582 gnutls_source_sync_child_source (GTlsConnectionGnutlsSource *gnutls_source,
 583                                  GIOCondition                direction)
 584 {
 585   GTlsConnectionGnutls *gnutls = gnutls_source->gnutls;
 586   GSource *source = (GSource *)gnutls_source;
 587
 588   if (direction == gnutls_source->current_direction)
 589     return;
 590
 591   if (gnutls_source->child_source)
 592     {
 593       g_source_remove_child_source (source, gnutls_source->child_source);
 594       g_source_unref (gnutls_source->child_source);
 595     }
 596
 597   if (direction & G_IO_IN)
 598     gnutls_source->child_source = g_pollable_input_stream_create_source (gnutls->priv->base_istream, NULL);
 599   else
 600     gnutls_source->child_source = g_pollable_output_stream_create_source (gnutls->priv->base_ostream, NULL);
 601
 602   g_source_set_dummy_callback (gnutls_source->child_source);
 603   g_source_add_child_source (source, gnutls_source->child_source);
 604   gnutls_source->current_direction = direction;
 605 }
 606
 607 static gboolean
 608 gnutls_source_dispatch (GSource     *source,
 609                         GSourceFunc  callback,
 610                         gpointer     user_data)
 611 {
 612   GPollableSourceFunc func = (GPollableSourceFunc)callback;
 613   GTlsConnectionGnutlsSource *gnutls_source = (GTlsConnectionGnutlsSource *)source;
 614   GTlsConnectionGnutls *gnutls = gnutls_source->gnutls;
 615   gboolean ret;
 616
 617   ret = (*func) (gnutls_source->stream, user_data);
 618   if (ret)
 619     {
 620       GIOCondition direction = gnutls->priv->internal_direction ? gnutls->priv->internal_direction : gnutls_source->base_direction;
 621
 622       gnutls_source_sync_child_source (gnutls_source, direction);
 623     }
 624
 625   return ret;
 626 }
 627
 628 static void
 629 gnutls_source_finalize (GSource *source)
 630 {
 631   GTlsConnectionGnutlsSource *gnutls_source = (GTlsConnectionGnutlsSource *)source;
 632
 633   g_object_unref (gnutls_source->gnutls);
 634
 635   if (gnutls_source->child_source)
 636     g_source_unref (gnutls_source->child_source);
 637 }
 638
 639 static gboolean
 640 g_tls_connection_gnutls_source_closure_callback (GObject  *stream,
 641                                                  gpointer  data)
 642 {
 643   GClosure *closure = data;
 644
 645   GValue param = { 0, };
 646   GValue result_value = { 0, };
 647   gboolean result;
 648
 649   g_value_init (&result_value, G_TYPE_BOOLEAN);
 650
 651   g_value_init (&param, G_TYPE_OBJECT);
 652   g_value_set_object (&param, stream);
 653
 654   g_closure_invoke (closure, &result_value, 1, &param, NULL);
 655
 656   result = g_value_get_boolean (&result_value);
 657   g_value_unset (&result_value);
 658   g_value_unset (&param);
 659
 660   return result;
 661 }
 662
 663 static GSourceFuncs gnutls_source_funcs =
 664 {
 665   gnutls_source_prepare,
 666   gnutls_source_check,
 667   gnutls_source_dispatch,
 668   gnutls_source_finalize,
 669   (GSourceFunc)g_tls_connection_gnutls_source_closure_callback,
 670   (GSourceDummyMarshal)_gnutls_marshal_BOOLEAN__VOID,
 671 };
 672
 673 GSource *
 674 g_tls_connection_gnutls_create_source (GTlsConnectionGnutls  *gnutls,
 675                                        GIOCondition           condition,
 676                                        GCancellable          *cancellable)
 677 {
 678   GSource *source, *cancellable_source;
 679   GTlsConnectionGnutlsSource *gnutls_source;
 680
 681   source = g_source_new (&gnutls_source_funcs, sizeof (GTlsConnectionGnutlsSource));
 682   g_source_set_name (source, "GTlsConnectionGnutlsSource");
 683   gnutls_source = (GTlsConnectionGnutlsSource *)source;
 684   gnutls_source->gnutls = g_object_ref (gnutls);
 685   gnutls_source->base_direction = condition & (G_IO_IN | G_IO_OUT);
 686   if (gnutls_source->base_direction == G_IO_IN)
 687     gnutls_source->stream = G_OBJECT (gnutls->priv->tls_istream);
 688   else if (gnutls_source->base_direction == G_IO_OUT)
 689     gnutls_source->stream = G_OBJECT (gnutls->priv->tls_ostream);
 690   else
 691     {
 692       gnutls_source->base_direction = gnutls->priv->internal_direction;
 693       gnutls_source->stream = NULL;
 694     }
 695   gnutls_source_sync_child_source (gnutls_source, gnutls_source->base_direction);
 696
 697   if (cancellable)
 698     {
 699       cancellable_source = g_cancellable_source_new (cancellable);
 700       g_source_set_dummy_callback (cancellable_source);
 701       g_source_add_child_source (source, cancellable_source);
 702       g_source_unref (cancellable_source);
 703     }
 704
 705   return source;
 706 }
 707
 708 static void
 709 set_gnutls_error (GTlsConnectionGnutls *gnutls, GIOCondition direction)
 710 {
 711   if (g_error_matches (gnutls->priv->error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
 712     gnutls_transport_set_errno (gnutls->priv->session, EINTR);
 713   else if (g_error_matches (gnutls->priv->error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 714     {
 715       gnutls_transport_set_errno (gnutls->priv->session, EAGAIN);
 716       gnutls->priv->internal_direction = direction;
 717     }
 718   else
 719     gnutls_transport_set_errno (gnutls->priv->session, EIO);
 720 }
 721
 722 static ssize_t
 723 g_tls_connection_gnutls_pull_func (gnutls_transport_ptr_t  transport_data,
 724                                    void                   *buf,
 725                                    size_t                  buflen)
 726 {
 727   GTlsConnectionGnutls *gnutls = transport_data;
 728   ssize_t ret;
 729
 730   /* If gnutls->priv->error is non-%NULL when we're called, it means
 731    * that an error previously occurred, but gnutls decided not to
 732    * propagate it. So it's correct for us to just clear it. (Usually
 733    * this means it ignored an EAGAIN after a short read, and now
 734    * we'll return EAGAIN again, which it will obey this time.)
 735    */
 736   g_clear_error (&gnutls->priv->error);
 737
 738   if (gnutls->priv->blocking)
 739     {
 740       ret = g_input_stream_read (G_INPUT_STREAM (gnutls->priv->base_istream),
 741                                  buf, buflen,
 742                                  gnutls->priv->cancellable,
 743                                  &gnutls->priv->error);
 744     }
 745   else
 746     {
 747       ret = g_pollable_input_stream_read_nonblocking (gnutls->priv->base_istream,
 748                                                       buf, buflen,
 749                                                       gnutls->priv->cancellable,
 750                                                       &gnutls->priv->error);
 751     }
 752
 753   if (ret < 0)
 754     set_gnutls_error (gnutls, G_IO_IN);
 755   else if (ret == 0)
 756     gnutls->priv->eof = TRUE;
 757
 758   return ret;
 759 }
 760
 761 static ssize_t
 762 g_tls_connection_gnutls_push_func (gnutls_transport_ptr_t  transport_data,
 763                                    const void             *buf,
 764                                    size_t                  buflen)
 765 {
 766   GTlsConnectionGnutls *gnutls = transport_data;
 767   ssize_t ret;
 768
 769   /* See comment in pull_func. */
 770   g_clear_error (&gnutls->priv->error);
 771
 772   if (gnutls->priv->blocking)
 773     {
 774       ret = g_output_stream_write (G_OUTPUT_STREAM (gnutls->priv->base_ostream),
 775                                    buf, buflen,
 776                                    gnutls->priv->cancellable,
 777                                    &gnutls->priv->error);
 778     }
 779   else
 780     {
 781       ret = g_pollable_output_stream_write_nonblocking (gnutls->priv->base_ostream,
 782                                                         buf, buflen,
 783                                                         gnutls->priv->cancellable,
 784                                                         &gnutls->priv->error);
 785     }
 786   if (ret < 0)
 787     set_gnutls_error (gnutls, G_IO_OUT);
 788
 789   return ret;
 790 }
 791
 792 static gboolean
 793 handshake_internal (GTlsConnectionGnutls  *gnutls,
 794                     gboolean               blocking,
 795                     GCancellable          *cancellable,
 796                     GError               **error)
 797 {
 798   GTlsCertificate *peer_certificate;
 799   GTlsCertificateFlags peer_certificate_errors;
 800   int ret;
 801
 802   if (G_IS_TLS_SERVER_CONNECTION_GNUTLS (gnutls) &&
 803       gnutls->priv->ever_handshaked && !gnutls->priv->need_handshake)
 804     {
 805       BEGIN_GNUTLS_IO (gnutls, blocking, cancellable);
 806       ret = gnutls_rehandshake (gnutls->priv->session);
 807       END_GNUTLS_IO (gnutls, ret, _("Error performing TLS handshake: %s"), error);
 808
 809       if (ret != 0)
 810         return FALSE;
 811     }
 812
 813   if (!gnutls->priv->handshaking)
 814     {
 815       gnutls->priv->handshaking = TRUE;
 816
 817       if (gnutls->priv->peer_certificate)
 818         {
 819           g_object_unref (gnutls->priv->peer_certificate);
 820           gnutls->priv->peer_certificate = NULL;
 821           gnutls->priv->peer_certificate_errors = 0;
 822
 823           g_object_notify (G_OBJECT (gnutls), "peer-certificate");
 824           g_object_notify (G_OBJECT (gnutls), "peer-certificate-errors");
 825         }
 826
 827       g_tls_connection_gnutls_set_handshake_priority (gnutls);
 828       G_TLS_CONNECTION_GNUTLS_GET_CLASS (gnutls)->begin_handshake (gnutls);
 829     }
 830
 831   BEGIN_GNUTLS_IO (gnutls, blocking, cancellable);
 832   ret = gnutls_handshake (gnutls->priv->session);
 833   END_GNUTLS_IO (gnutls, ret, _("Error performing TLS handshake: %s"), error);
 834
 835   if (ret == GNUTLS_E_AGAIN)
 836     return FALSE;
 837
 838   gnutls->priv->handshaking = FALSE;
 839   gnutls->priv->need_handshake = FALSE;
 840   gnutls->priv->ever_handshaked = TRUE;
 841
 842   if (ret == 0 &&
 843       gnutls_certificate_type_get (gnutls->priv->session) == GNUTLS_CRT_X509)
 844     {
 845       GTlsCertificate *chain, *cert;
 846       const gnutls_datum_t *certs;
 847       unsigned int num_certs;
 848       int i;
 849
 850       certs = gnutls_certificate_get_peers (gnutls->priv->session, &num_certs);
 851       chain = NULL;
 852       if (certs)
 853         {
 854           for (i = num_certs - 1; i >= 0; i--)
 855             {
 856               cert = g_tls_certificate_gnutls_new (&certs[i], chain);
 857               chain = cert;
 858             }
 859         }
 860
 861       peer_certificate = chain;
 862     }
 863   else
 864     peer_certificate = NULL;
 865
 866   if (peer_certificate)
 867     {
 868       if (!G_TLS_CONNECTION_GNUTLS_GET_CLASS (gnutls)->verify_peer (gnutls, peer_certificate, &peer_certificate_errors))
 869         {
 870           g_object_unref (peer_certificate);
 871           g_set_error_literal (error, G_TLS_ERROR, G_TLS_ERROR_BAD_CERTIFICATE,
 872                                _("Unacceptable TLS certificate"));
 873           return FALSE;
 874         }
 875     }
 876
 877   G_TLS_CONNECTION_GNUTLS_GET_CLASS (gnutls)->finish_handshake (gnutls, error);
 878
 879   if (ret == 0)
 880     {
 881       gnutls->priv->peer_certificate = peer_certificate;
 882       gnutls->priv->peer_certificate_errors = peer_certificate_errors;
 883
 884       g_object_notify (G_OBJECT (gnutls), "peer-certificate");
 885       g_object_notify (G_OBJECT (gnutls), "peer-certificate-errors");
 886
 887       return TRUE;
 888     }
 889   else
 890     return FALSE;
 891 }
 892
 893 static gboolean
 894 handshake_in_progress_or_failed (GTlsConnectionGnutls  *gnutls,
 895                                  gboolean               blocking,
 896                                  GCancellable          *cancellable,
 897                                  GError               **error)
 898 {
 899   if (!(gnutls->priv->need_handshake || gnutls->priv->handshaking))
 900     return FALSE;
 901
 902   return !handshake_internal (gnutls, blocking, cancellable, error);
 903 }
 904
 905 static gboolean
 906 g_tls_connection_gnutls_handshake (GTlsConnection   *conn,
 907                                    GCancellable     *cancellable,
 908                                    GError          **error)
 909 {
 910   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (conn);
 911
 912   return handshake_internal (gnutls, TRUE, cancellable, error);
 913 }
 914
 915 static gboolean
 916 g_tls_connection_gnutls_handshake_ready (GObject  *pollable_stream,
 917                                          gpointer  user_data)
 918 {
 919   GTlsConnectionGnutls *gnutls;
 920   GSimpleAsyncResult *simple = user_data;
 921   gboolean success;
 922   GError *error = NULL;
 923
 924   gnutls = G_TLS_CONNECTION_GNUTLS (g_async_result_get_source_object (G_ASYNC_RESULT (simple)));
 925   g_object_unref (gnutls);
 926
 927   success = handshake_internal (gnutls, FALSE, NULL, &error);
 928   if (!success && g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 929     {
 930       g_error_free (error);
 931       return TRUE;
 932     }
 933
 934   if (error)
 935     {
 936       g_simple_async_result_set_from_error (simple, error);
 937       g_error_free (error);
 938     }
 939   else
 940     g_simple_async_result_set_op_res_gboolean (simple, success);
 941   g_simple_async_result_complete (simple);
 942   g_object_unref (simple);
 943
 944   return FALSE;
 945 }
 946
 947 static void
 948 g_tls_connection_gnutls_handshake_async (GTlsConnection       *conn,
 949                                          int                   io_priority,
 950                                          GCancellable         *cancellable,
 951                                          GAsyncReadyCallback   callback,
 952                                          gpointer              user_data)
 953 {
 954   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (conn);
 955   GSimpleAsyncResult *simple;
 956   gboolean success;
 957   GError *error = NULL;
 958   GSource *source;
 959
 960   simple = g_simple_async_result_new (G_OBJECT (conn), callback, user_data,
 961                                       g_tls_connection_gnutls_handshake_async);
 962   success = handshake_internal (gnutls, FALSE, cancellable, &error);
 963   if (success)
 964     {
 965       g_simple_async_result_set_op_res_gboolean (simple, TRUE);
 966       g_simple_async_result_complete_in_idle (simple);
 967       g_object_unref (simple);
 968     }
 969   else if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 970     {
 971       g_simple_async_result_set_from_error (simple, error);
 972       g_error_free (error);
 973       g_simple_async_result_complete_in_idle (simple);
 974       g_object_unref (simple);
 975     }
 976
 977   source = g_tls_connection_gnutls_create_source (gnutls, 0, cancellable);
 978   g_source_set_callback (source,
 979                          (GSourceFunc) g_tls_connection_gnutls_handshake_ready,
 980                          simple, NULL);
 981   g_source_set_priority (source, io_priority);
 982   g_source_attach (source, g_main_context_get_thread_default ());
 983   g_source_unref (source);
 984 }
 985
 986 static gboolean
 987 g_tls_connection_gnutls_handshake_finish (GTlsConnection       *conn,
 988                                           GAsyncResult         *result,
 989                                           GError              **error)
 990 {
 991   GSimpleAsyncResult *simple;
 992
 993   g_return_val_if_fail (g_simple_async_result_is_valid (result, G_OBJECT (conn), g_tls_connection_gnutls_handshake_async), FALSE);
 994
 995   simple = G_SIMPLE_ASYNC_RESULT (result);
 996
 997   if (g_simple_async_result_propagate_error (simple, error))
 998     return FALSE;
 999
1000   return g_simple_async_result_get_op_res_gboolean (simple);
1001 }
1002
1003 gssize
1004 g_tls_connection_gnutls_read (GTlsConnectionGnutls  *gnutls,
1005                               void                  *buffer,
1006                               gsize                  count,
1007                               gboolean               blocking,
1008                               GCancellable          *cancellable,
1009                               GError               **error)
1010 {
1011   gssize ret;
1012
1013  again:
1014   if (handshake_in_progress_or_failed (gnutls, blocking, cancellable, error))
1015     return -1;
1016
1017   BEGIN_GNUTLS_IO (gnutls, blocking, cancellable);
1018   ret = gnutls_record_recv (gnutls->priv->session, buffer, count);
1019   END_GNUTLS_IO (gnutls, ret, _("Error reading data from TLS socket: %s"), error);
1020
1021   if (ret >= 0)
1022     return ret;
1023   else if (ret == GNUTLS_E_REHANDSHAKE)
1024     goto again;
1025   else
1026     return -1;
1027 }
1028
1029 gssize
1030 g_tls_connection_gnutls_write (GTlsConnectionGnutls  *gnutls,
1031                                const void            *buffer,
1032                                gsize                  count,
1033                                gboolean               blocking,
1034                                GCancellable          *cancellable,
1035                                GError               **error)
1036 {
1037   gssize ret;
1038
1039  again:
1040   if (handshake_in_progress_or_failed (gnutls, blocking, cancellable, error))
1041     return -1;
1042
1043   BEGIN_GNUTLS_IO (gnutls, blocking, cancellable);
1044   ret = gnutls_record_send (gnutls->priv->session, buffer, count);
1045   END_GNUTLS_IO (gnutls, ret, _("Error writing data to TLS socket: %s"), error);
1046
1047   if (ret >= 0)
1048     return ret;
1049   else if (ret == GNUTLS_E_REHANDSHAKE)
1050     goto again;
1051   else
1052     return -1;
1053 }
1054
1055 static GInputStream  *
1056 g_tls_connection_gnutls_get_input_stream (GIOStream *stream)
1057 {
1058   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (stream);
1059
1060   return gnutls->priv->tls_istream;
1061 }
1062
1063 static GOutputStream *
1064 g_tls_connection_gnutls_get_output_stream (GIOStream *stream)
1065 {
1066   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (stream);
1067
1068   return gnutls->priv->tls_ostream;
1069 }
1070
1071 static gboolean
1072 close_internal (GTlsConnectionGnutls  *gnutls,
1073                 gboolean               blocking,
1074                 GCancellable          *cancellable,
1075                 GError               **error)
1076 {
1077   int ret;
1078
1079   /* If we haven't finished the initial handshake yet, there's no
1080    * reason to finish it just so we can close.
1081    */
1082   if (gnutls->priv->handshaking && !gnutls->priv->ever_handshaked)
1083     return TRUE;
1084
1085   if (handshake_in_progress_or_failed (gnutls, blocking, cancellable, error))
1086     return FALSE;
1087
1088   gnutls->priv->closing = TRUE;
1089   BEGIN_GNUTLS_IO (gnutls, blocking, cancellable);
1090   ret = gnutls_bye (gnutls->priv->session, GNUTLS_SHUT_WR);
1091   END_GNUTLS_IO (gnutls, ret, _("Error performing TLS close: %s"), error);
1092   if (ret == 0 || !error || !g_error_matches (*error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
1093     gnutls->priv->closing = FALSE;
1094
1095   return ret == 0;
1096 }
1097
1098 static gboolean
1099 g_tls_connection_gnutls_close (GIOStream     *stream,
1100                                GCancellable  *cancellable,
1101                                GError       **error)
1102 {
1103   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (stream);
1104
1105   if (!close_internal (gnutls, TRUE, cancellable, error))
1106     return FALSE;
1107   return g_io_stream_close (gnutls->priv->base_io_stream,
1108                             cancellable, error);
1109 }
1110
1111 typedef struct {
1112   GSimpleAsyncResult *simple;
1113   GCancellable *cancellable;
1114   int io_priority;
1115 } AsyncCloseData;
1116
1117 static void
1118 close_base_stream_cb (GObject      *base_stream,
1119                       GAsyncResult *result,
1120                       gpointer      user_data)
1121 {
1122   gboolean success;
1123   GError *error = NULL;
1124   AsyncCloseData *acd = user_data;
1125
1126   success = g_io_stream_close_finish (G_IO_STREAM (base_stream),
1127                                       result, &error);
1128   if (success)
1129     g_simple_async_result_set_op_res_gboolean (acd->simple, TRUE);
1130   else
1131     {
1132       g_simple_async_result_set_from_error (acd->simple, error);
1133       g_error_free (error);
1134     }
1135
1136   g_simple_async_result_complete (acd->simple);
1137   g_object_unref (acd->simple);
1138   if (acd->cancellable)
1139     g_object_unref (acd->cancellable);
1140   g_slice_free (AsyncCloseData, acd);
1141 }
1142
1143 static gboolean
1144 g_tls_connection_gnutls_close_ready (GObject  *pollable_stream,
1145                                      gpointer  user_data)
1146 {
1147   GTlsConnectionGnutls *gnutls;
1148   AsyncCloseData *acd = user_data;
1149   gboolean success;
1150   GError *error = NULL;
1151
1152   gnutls = G_TLS_CONNECTION_GNUTLS (g_async_result_get_source_object (G_ASYNC_RESULT (acd->simple)));
1153   g_object_unref (gnutls);
1154
1155   success = close_internal (gnutls, FALSE, NULL, &error);
1156   if (!success && g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
1157     {
1158       g_error_free (error);
1159       return TRUE;
1160     }
1161
1162   if (error)
1163     {
1164       g_simple_async_result_set_from_error (acd->simple, error);
1165       g_simple_async_result_complete (acd->simple);
1166       g_error_free (error);
1167       g_object_unref (acd->simple);
1168       if (acd->cancellable)
1169         g_object_unref (acd->cancellable);
1170       g_slice_free (AsyncCloseData, acd);
1171     }
1172   else
1173     {
1174       g_io_stream_close_async (gnutls->priv->base_io_stream,
1175                                acd->io_priority, acd->cancellable,
1176                                close_base_stream_cb, acd);
1177     }
1178
1179   return FALSE;
1180 }
1181
1182 static void
1183 g_tls_connection_gnutls_close_async (GIOStream           *stream,
1184                                      int                  io_priority,
1185                                      GCancellable        *cancellable,
1186                                      GAsyncReadyCallback  callback,
1187                                      gpointer             user_data)
1188 {
1189   GTlsConnectionGnutls *gnutls = G_TLS_CONNECTION_GNUTLS (stream);
1190   GSimpleAsyncResult *simple;
1191   gboolean success;
1192   GError *error = NULL;
1193   AsyncCloseData *acd;
1194   GSource *source;
1195
1196   simple = g_simple_async_result_new (G_OBJECT (stream), callback, user_data,
1197                                       g_tls_connection_gnutls_close_async);
1198
1199   success = close_internal (gnutls, FALSE, cancellable, &error);
1200   if (error && !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
1201     {
1202       g_simple_async_result_set_from_error (simple, error);
1203       g_error_free (error);
1204       g_simple_async_result_complete_in_idle (simple);
1205       g_object_unref (simple);
1206     }
1207
1208   if (error)
1209     g_error_free (error);
1210
1211   acd = g_slice_new (AsyncCloseData);
1212   acd->simple = simple;
1213   acd->cancellable = g_object_ref (cancellable);
1214   acd->io_priority = io_priority;
1215
1216   if (success)
1217     {
1218       g_io_stream_close_async (gnutls->priv->base_io_stream,
1219                                io_priority, cancellable,
1220                                close_base_stream_cb, acd);
1221       return;
1222     }
1223
1224   source = g_tls_connection_gnutls_create_source (gnutls, 0, acd->cancellable);
1225   g_source_set_callback (source,
1226                          (GSourceFunc) g_tls_connection_gnutls_close_ready,
1227                          acd, NULL);
1228   g_source_set_priority (source, acd->io_priority);
1229   g_source_attach (source, g_main_context_get_thread_default ());
1230   g_source_unref (source);
1231 }
1232
1233 static gboolean
1234 g_tls_connection_gnutls_close_finish (GIOStream           *stream,
1235                                       GAsyncResult        *result,
1236                                       GError             **error)
1237 {
1238   GSimpleAsyncResult *simple;
1239
1240   g_return_val_if_fail (g_simple_async_result_is_valid (result, G_OBJECT (stream), g_tls_connection_gnutls_close_async), FALSE);
1241
1242   simple = G_SIMPLE_ASYNC_RESULT (result);
1243
1244   if (g_simple_async_result_propagate_error (simple, error))
1245     return FALSE;
1246
1247   return g_simple_async_result_get_op_res_gboolean (simple);
1248 }