1 /* GDBus - GLib D-Bus Library
3 * Copyright (C) 2008-2010 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.
20 * Author: David Zeuthen <davidz@redhat.com>
25 #include "gdbusauth.h"
27 #include "gdbusauthmechanismanon.h"
28 #include "gdbusauthmechanismexternal.h"
29 #include "gdbusauthmechanismsha1.h"
30 #include "gdbusauthobserver.h"
32 #include "gdbuserror.h"
33 #include "gdbusutils.h"
34 #include "gioenumtypes.h"
35 #include "gcredentials.h"
36 #include "gdbusprivate.h"
37 #include "giostream.h"
38 #include "gdatainputstream.h"
39 #include "gdataoutputstream.h"
42 #include <sys/types.h>
43 #include <sys/socket.h>
44 #include "gunixconnection.h"
45 #include "gunixcredentialsmessage.h"
51 debug_print (const gchar *message, ...)
53 if (G_UNLIKELY (_g_dbus_debug_authentication ()))
60 _g_dbus_debug_print_lock ();
62 va_start (var_args, message);
63 s = g_strdup_vprintf (message, var_args);
66 str = g_string_new (NULL);
67 for (n = 0; s[n] != '\0'; n++)
69 if (G_UNLIKELY (s[n] == '\r'))
70 g_string_append (str, "\\r");
71 else if (G_UNLIKELY (s[n] == '\n'))
72 g_string_append (str, "\\n");
74 g_string_append_c (str, s[n]);
76 g_print ("GDBus-debug:Auth: %s\n", str->str);
77 g_string_free (str, TRUE);
80 _g_dbus_debug_print_unlock ();
91 static void mechanism_free (Mechanism *m);
93 struct _GDBusAuthPrivate
97 /* A list of available Mechanism, sorted according to priority */
98 GList *available_mechanisms;
107 G_DEFINE_TYPE (GDBusAuth, _g_dbus_auth, G_TYPE_OBJECT);
109 /* ---------------------------------------------------------------------------------------------------- */
112 _g_dbus_auth_finalize (GObject *object)
114 GDBusAuth *auth = G_DBUS_AUTH (object);
116 if (auth->priv->stream != NULL)
117 g_object_unref (auth->priv->stream);
118 g_list_free_full (auth->priv->available_mechanisms, (GDestroyNotify) mechanism_free);
120 if (G_OBJECT_CLASS (_g_dbus_auth_parent_class)->finalize != NULL)
121 G_OBJECT_CLASS (_g_dbus_auth_parent_class)->finalize (object);
125 _g_dbus_auth_get_property (GObject *object,
130 GDBusAuth *auth = G_DBUS_AUTH (object);
135 g_value_set_object (value, auth->priv->stream);
139 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
145 _g_dbus_auth_set_property (GObject *object,
150 GDBusAuth *auth = G_DBUS_AUTH (object);
155 auth->priv->stream = g_value_dup_object (value);
159 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
165 _g_dbus_auth_class_init (GDBusAuthClass *klass)
167 GObjectClass *gobject_class;
169 g_type_class_add_private (klass, sizeof (GDBusAuthPrivate));
171 gobject_class = G_OBJECT_CLASS (klass);
172 gobject_class->get_property = _g_dbus_auth_get_property;
173 gobject_class->set_property = _g_dbus_auth_set_property;
174 gobject_class->finalize = _g_dbus_auth_finalize;
176 g_object_class_install_property (gobject_class,
178 g_param_spec_object ("stream",
180 P_("The underlying GIOStream used for I/O"),
184 G_PARAM_CONSTRUCT_ONLY |
185 G_PARAM_STATIC_NAME |
186 G_PARAM_STATIC_BLURB |
187 G_PARAM_STATIC_NICK));
191 mechanism_free (Mechanism *m)
197 add_mechanism (GDBusAuth *auth,
198 GType mechanism_type)
202 m = g_new0 (Mechanism, 1);
203 m->name = _g_dbus_auth_mechanism_get_name (mechanism_type);
204 m->priority = _g_dbus_auth_mechanism_get_priority (mechanism_type);
205 m->gtype = mechanism_type;
207 auth->priv->available_mechanisms = g_list_prepend (auth->priv->available_mechanisms, m);
211 mech_compare_func (Mechanism *a, Mechanism *b)
214 /* ensure deterministic order */
215 ret = b->priority - a->priority;
217 ret = g_strcmp0 (b->name, a->name);
222 _g_dbus_auth_init (GDBusAuth *auth)
224 auth->priv = G_TYPE_INSTANCE_GET_PRIVATE (auth, G_TYPE_DBUS_AUTH, GDBusAuthPrivate);
226 /* TODO: trawl extension points */
227 add_mechanism (auth, G_TYPE_DBUS_AUTH_MECHANISM_ANON);
228 add_mechanism (auth, G_TYPE_DBUS_AUTH_MECHANISM_SHA1);
229 add_mechanism (auth, G_TYPE_DBUS_AUTH_MECHANISM_EXTERNAL);
231 auth->priv->available_mechanisms = g_list_sort (auth->priv->available_mechanisms,
232 (GCompareFunc) mech_compare_func);
236 find_mech_by_name (GDBusAuth *auth,
244 for (l = auth->priv->available_mechanisms; l != NULL; l = l->next)
246 Mechanism *m = l->data;
247 if (g_strcmp0 (name, m->name) == 0)
259 _g_dbus_auth_new (GIOStream *stream)
261 return g_object_new (G_TYPE_DBUS_AUTH,
266 /* ---------------------------------------------------------------------------------------------------- */
267 /* like g_data_input_stream_read_line() but sets error if there's no content to read */
269 _my_g_data_input_stream_read_line (GDataInputStream *dis,
270 gsize *out_line_length,
271 GCancellable *cancellable,
276 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
278 ret = g_data_input_stream_read_line (dis,
282 if (ret == NULL && error != NULL && *error == NULL)
284 g_set_error_literal (error,
287 _("Unexpected lack of content trying to read a line"));
293 /* This function is to avoid situations like this
295 * BEGIN\r\nl\0\0\1...
297 * e.g. where we read into the first D-Bus message while waiting for
298 * the final line from the client (TODO: file bug against gio for
302 _my_g_input_stream_read_line_safe (GInputStream *i,
303 gsize *out_line_length,
304 GCancellable *cancellable,
310 gboolean last_was_cr;
312 str = g_string_new (NULL);
317 num_read = g_input_stream_read (i,
326 if (error != NULL && *error == NULL)
328 g_set_error_literal (error,
331 _("Unexpected lack of content trying to (safely) read a line"));
336 g_string_append_c (str, (gint) c);
341 g_assert (str->len >= 2);
342 g_string_set_size (str, str->len - 2);
346 last_was_cr = (c == 0x0d);
350 if (out_line_length != NULL)
351 *out_line_length = str->len;
352 return g_string_free (str, FALSE);
355 g_assert (error == NULL || *error != NULL);
356 g_string_free (str, TRUE);
360 /* ---------------------------------------------------------------------------------------------------- */
363 append_nibble (GString *s, gint val)
365 g_string_append_c (s, val >= 10 ? ('a' + val - 10) : ('0' + val));
369 hexdecode (const gchar *str,
378 s = g_string_new (NULL);
380 for (n = 0; str[n] != '\0'; n += 2)
386 upper_nibble = g_ascii_xdigit_value (str[n]);
387 lower_nibble = g_ascii_xdigit_value (str[n + 1]);
388 if (upper_nibble == -1 || lower_nibble == -1)
393 "Error hexdecoding string `%s' around position %d",
397 value = (upper_nibble<<4) | lower_nibble;
398 g_string_append_c (s, value);
401 ret = g_string_free (s, FALSE);
406 g_string_free (s, TRUE);
412 hexencode (const gchar *str)
417 s = g_string_new (NULL);
418 for (n = 0; str[n] != '\0'; n++)
424 val = ((const guchar *) str)[n];
425 upper_nibble = val >> 4;
426 lower_nibble = val & 0x0f;
428 append_nibble (s, upper_nibble);
429 append_nibble (s, lower_nibble);
432 return g_string_free (s, FALSE);
435 /* ---------------------------------------------------------------------------------------------------- */
437 static GDBusAuthMechanism *
438 client_choose_mech_and_send_initial_response (GDBusAuth *auth,
439 GCredentials *credentials_that_were_sent,
440 const gchar* const *supported_auth_mechs,
441 GPtrArray *attempted_auth_mechs,
442 GDataOutputStream *dos,
443 GCancellable *cancellable,
446 GDBusAuthMechanism *mech;
447 GType auth_mech_to_use_gtype;
450 gchar *initial_response;
451 gsize initial_response_len;
458 debug_print ("CLIENT: Trying to choose mechanism");
460 /* find an authentication mechanism to try, if any */
461 auth_mech_to_use_gtype = (GType) 0;
462 for (n = 0; supported_auth_mechs[n] != NULL; n++)
464 gboolean attempted_already;
465 attempted_already = FALSE;
466 for (m = 0; m < attempted_auth_mechs->len; m++)
468 if (g_strcmp0 (supported_auth_mechs[n], attempted_auth_mechs->pdata[m]) == 0)
470 attempted_already = TRUE;
474 if (!attempted_already)
476 auth_mech_to_use_gtype = find_mech_by_name (auth, supported_auth_mechs[n]);
477 if (auth_mech_to_use_gtype != (GType) 0)
482 if (auth_mech_to_use_gtype == (GType) 0)
488 debug_print ("CLIENT: Exhausted all available mechanisms");
490 available = g_strjoinv (", ", (gchar **) supported_auth_mechs);
492 tried_str = g_string_new (NULL);
493 for (n = 0; n < attempted_auth_mechs->len; n++)
496 g_string_append (tried_str, ", ");
497 g_string_append (tried_str, attempted_auth_mechs->pdata[n]);
502 _("Exhausted all available authentication mechanisms (tried: %s) (available: %s)"),
505 g_string_free (tried_str, TRUE);
510 /* OK, decided on a mechanism - let's do this thing */
511 mech = g_object_new (auth_mech_to_use_gtype,
512 "stream", auth->priv->stream,
513 "credentials", credentials_that_were_sent,
515 debug_print ("CLIENT: Trying mechanism `%s'", _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype));
516 g_ptr_array_add (attempted_auth_mechs, (gpointer) _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype));
518 /* the auth mechanism may not be supported
519 * (for example, EXTERNAL only works if credentials were exchanged)
521 if (!_g_dbus_auth_mechanism_is_supported (mech))
523 debug_print ("CLIENT: Mechanism `%s' says it is not supported", _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype));
524 g_object_unref (mech);
529 initial_response_len = -1;
530 initial_response = _g_dbus_auth_mechanism_client_initiate (mech,
531 &initial_response_len);
533 g_printerr ("using auth mechanism with name `%s' of type `%s' with initial response `%s'\n",
534 _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype),
535 g_type_name (G_TYPE_FROM_INSTANCE (mech)),
538 if (initial_response != NULL)
540 //g_printerr ("initial_response = `%s'\n", initial_response);
541 encoded = hexencode (initial_response);
542 s = g_strdup_printf ("AUTH %s %s\r\n",
543 _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype),
545 g_free (initial_response);
550 s = g_strdup_printf ("AUTH %s\r\n", _g_dbus_auth_mechanism_get_name (auth_mech_to_use_gtype));
552 debug_print ("CLIENT: writing `%s'", s);
553 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
555 g_object_unref (mech);
567 /* ---------------------------------------------------------------------------------------------------- */
571 CLIENT_STATE_WAITING_FOR_DATA,
572 CLIENT_STATE_WAITING_FOR_OK,
573 CLIENT_STATE_WAITING_FOR_REJECT,
574 CLIENT_STATE_WAITING_FOR_AGREE_UNIX_FD
578 _g_dbus_auth_run_client (GDBusAuth *auth,
579 GDBusCapabilityFlags offered_capabilities,
580 GDBusCapabilityFlags *out_negotiated_capabilities,
581 GCancellable *cancellable,
585 GDataInputStream *dis;
586 GDataOutputStream *dos;
587 GCredentials *credentials;
591 gchar **supported_auth_mechs;
592 GPtrArray *attempted_auth_mechs;
593 GDBusAuthMechanism *mech;
595 GDBusCapabilityFlags negotiated_capabilities;
597 debug_print ("CLIENT: initiating");
600 supported_auth_mechs = NULL;
601 attempted_auth_mechs = g_ptr_array_new ();
603 negotiated_capabilities = 0;
606 dis = G_DATA_INPUT_STREAM (g_data_input_stream_new (g_io_stream_get_input_stream (auth->priv->stream)));
607 dos = G_DATA_OUTPUT_STREAM (g_data_output_stream_new (g_io_stream_get_output_stream (auth->priv->stream)));
608 g_filter_input_stream_set_close_base_stream (G_FILTER_INPUT_STREAM (dis), FALSE);
609 g_filter_output_stream_set_close_base_stream (G_FILTER_OUTPUT_STREAM (dos), FALSE);
611 g_data_input_stream_set_newline_type (dis, G_DATA_STREAM_NEWLINE_TYPE_CR_LF);
614 if (G_IS_UNIX_CONNECTION (auth->priv->stream))
616 credentials = g_credentials_new ();
617 if (!g_unix_connection_send_credentials (G_UNIX_CONNECTION (auth->priv->stream),
624 if (!g_data_output_stream_put_byte (dos, '\0', cancellable, error))
628 if (!g_data_output_stream_put_byte (dos, '\0', cancellable, error))
632 if (credentials != NULL)
634 if (G_UNLIKELY (_g_dbus_debug_authentication ()))
636 s = g_credentials_to_string (credentials);
637 debug_print ("CLIENT: sent credentials `%s'", s);
643 debug_print ("CLIENT: didn't send any credentials");
646 /* TODO: to reduce roundtrips, try to pick an auth mechanism to start with */
648 /* Get list of supported authentication mechanisms */
650 debug_print ("CLIENT: writing `%s'", s);
651 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
653 state = CLIENT_STATE_WAITING_FOR_REJECT;
659 case CLIENT_STATE_WAITING_FOR_REJECT:
660 debug_print ("CLIENT: WaitingForReject");
661 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
664 debug_print ("CLIENT: WaitingForReject, read '%s'", line);
667 if (!g_str_has_prefix (line, "REJECTED "))
672 "In WaitingForReject: Expected `REJECTED am1 am2 ... amN', got `%s'",
677 if (supported_auth_mechs == NULL)
679 supported_auth_mechs = g_strsplit (line + sizeof ("REJECTED ") - 1, " ", 0);
681 for (n = 0; supported_auth_mechs != NULL && supported_auth_mechs[n] != NULL; n++)
682 g_printerr ("supported_auth_mechs[%d] = `%s'\n", n, supported_auth_mechs[n]);
686 mech = client_choose_mech_and_send_initial_response (auth,
688 (const gchar* const *) supported_auth_mechs,
689 attempted_auth_mechs,
695 if (_g_dbus_auth_mechanism_client_get_state (mech) == G_DBUS_AUTH_MECHANISM_STATE_WAITING_FOR_DATA)
696 state = CLIENT_STATE_WAITING_FOR_DATA;
698 state = CLIENT_STATE_WAITING_FOR_OK;
701 case CLIENT_STATE_WAITING_FOR_OK:
702 debug_print ("CLIENT: WaitingForOK");
703 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
706 debug_print ("CLIENT: WaitingForOK, read `%s'", line);
707 if (g_str_has_prefix (line, "OK "))
709 if (!g_dbus_is_guid (line + 3))
714 "Invalid OK response `%s'",
719 ret_guid = g_strdup (line + 3);
722 if (offered_capabilities & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING)
724 s = "NEGOTIATE_UNIX_FD\r\n";
725 debug_print ("CLIENT: writing `%s'", s);
726 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
728 state = CLIENT_STATE_WAITING_FOR_AGREE_UNIX_FD;
733 debug_print ("CLIENT: writing `%s'", s);
734 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
736 /* and we're done! */
740 else if (g_str_has_prefix (line, "REJECTED "))
742 goto choose_mechanism;
746 /* TODO: handle other valid responses */
750 "In WaitingForOk: unexpected response `%s'",
757 case CLIENT_STATE_WAITING_FOR_AGREE_UNIX_FD:
758 debug_print ("CLIENT: WaitingForAgreeUnixFD");
759 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
762 debug_print ("CLIENT: WaitingForAgreeUnixFD, read=`%s'", line);
763 if (g_strcmp0 (line, "AGREE_UNIX_FD") == 0)
766 negotiated_capabilities |= G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING;
768 debug_print ("CLIENT: writing `%s'", s);
769 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
771 /* and we're done! */
774 else if (g_str_has_prefix (line, "ERROR") && (line[5] == 0 || g_ascii_isspace (line[5])))
776 //g_strstrip (line + 5); g_debug ("bah, no unix_fd: `%s'", line + 5);
779 debug_print ("CLIENT: writing `%s'", s);
780 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
782 /* and we're done! */
787 /* TODO: handle other valid responses */
791 "In WaitingForAgreeUnixFd: unexpected response `%s'",
798 case CLIENT_STATE_WAITING_FOR_DATA:
799 debug_print ("CLIENT: WaitingForData");
800 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
803 debug_print ("CLIENT: WaitingForData, read=`%s'", line);
804 if (g_str_has_prefix (line, "DATA "))
808 gsize decoded_data_len = 0;
810 encoded = g_strdup (line + 5);
812 g_strstrip (encoded);
813 decoded_data = hexdecode (encoded, &decoded_data_len, error);
815 if (decoded_data == NULL)
817 g_prefix_error (error, "DATA response is malformed: ");
818 /* invalid encoding, disconnect! */
821 _g_dbus_auth_mechanism_client_data_receive (mech, decoded_data, decoded_data_len);
822 g_free (decoded_data);
824 if (_g_dbus_auth_mechanism_client_get_state (mech) == G_DBUS_AUTH_MECHANISM_STATE_HAVE_DATA_TO_SEND)
829 data = _g_dbus_auth_mechanism_client_data_send (mech, &data_len);
830 encoded_data = hexencode (data);
831 s = g_strdup_printf ("DATA %s\r\n", encoded_data);
832 g_free (encoded_data);
834 debug_print ("CLIENT: writing `%s'", s);
835 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
842 state = CLIENT_STATE_WAITING_FOR_OK;
844 else if (g_str_has_prefix (line, "REJECTED "))
846 /* could be the chosen authentication method just doesn't work. Try
849 goto choose_mechanism;
856 "In WaitingForData: unexpected response `%s'",
864 g_assert_not_reached ();
868 }; /* main authentication client loop */
872 g_object_unref (mech);
873 g_ptr_array_unref (attempted_auth_mechs);
874 g_strfreev (supported_auth_mechs);
875 g_object_unref (dis);
876 g_object_unref (dos);
878 /* ensure return value is NULL if error is set */
879 if (error != NULL && *error != NULL)
885 if (ret_guid != NULL)
887 if (out_negotiated_capabilities != NULL)
888 *out_negotiated_capabilities = negotiated_capabilities;
891 if (credentials != NULL)
892 g_object_unref (credentials);
894 debug_print ("CLIENT: Done, authenticated=%d", ret_guid != NULL);
899 /* ---------------------------------------------------------------------------------------------------- */
902 get_auth_mechanisms (GDBusAuth *auth,
903 gboolean allow_anonymous,
906 const gchar *separator)
912 str = g_string_new (prefix);
914 for (l = auth->priv->available_mechanisms; l != NULL; l = l->next)
916 Mechanism *m = l->data;
918 if (!allow_anonymous && g_strcmp0 (m->name, "ANONYMOUS") == 0)
922 g_string_append (str, separator);
923 g_string_append (str, m->name);
927 g_string_append (str, suffix);
928 return g_string_free (str, FALSE);
934 SERVER_STATE_WAITING_FOR_AUTH,
935 SERVER_STATE_WAITING_FOR_DATA,
936 SERVER_STATE_WAITING_FOR_BEGIN
940 _g_dbus_auth_run_server (GDBusAuth *auth,
941 GDBusAuthObserver *observer,
943 gboolean allow_anonymous,
944 GDBusCapabilityFlags offered_capabilities,
945 GDBusCapabilityFlags *out_negotiated_capabilities,
946 GCredentials **out_received_credentials,
947 GCancellable *cancellable,
952 GDataInputStream *dis;
953 GDataOutputStream *dos;
958 GDBusAuthMechanism *mech;
960 GDBusCapabilityFlags negotiated_capabilities;
961 GCredentials *credentials;
963 debug_print ("SERVER: initiating");
969 negotiated_capabilities = 0;
972 if (!g_dbus_is_guid (guid))
977 "The given guid `%s' is not valid",
982 dis = G_DATA_INPUT_STREAM (g_data_input_stream_new (g_io_stream_get_input_stream (auth->priv->stream)));
983 dos = G_DATA_OUTPUT_STREAM (g_data_output_stream_new (g_io_stream_get_output_stream (auth->priv->stream)));
984 g_filter_input_stream_set_close_base_stream (G_FILTER_INPUT_STREAM (dis), FALSE);
985 g_filter_output_stream_set_close_base_stream (G_FILTER_OUTPUT_STREAM (dos), FALSE);
987 g_data_input_stream_set_newline_type (dis, G_DATA_STREAM_NEWLINE_TYPE_CR_LF);
989 /* first read the NUL-byte (TODO: read credentials if using a unix domain socket) */
991 if (G_IS_UNIX_CONNECTION (auth->priv->stream))
994 credentials = g_unix_connection_receive_credentials (G_UNIX_CONNECTION (auth->priv->stream),
997 if (credentials == NULL && !g_error_matches (local_error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED))
999 g_propagate_error (error, local_error);
1006 byte = g_data_input_stream_read_byte (dis, cancellable, &local_error);
1007 byte = byte; /* To avoid -Wunused-but-set-variable */
1008 if (local_error != NULL)
1010 g_propagate_error (error, local_error);
1016 byte = g_data_input_stream_read_byte (dis, cancellable, &local_error);
1017 if (local_error != NULL)
1019 g_propagate_error (error, local_error);
1023 if (credentials != NULL)
1025 if (G_UNLIKELY (_g_dbus_debug_authentication ()))
1027 s = g_credentials_to_string (credentials);
1028 debug_print ("SERVER: received credentials `%s'", s);
1034 debug_print ("SERVER: didn't receive any credentials");
1037 state = SERVER_STATE_WAITING_FOR_AUTH;
1042 case SERVER_STATE_WAITING_FOR_AUTH:
1043 debug_print ("SERVER: WaitingForAuth");
1044 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
1045 debug_print ("SERVER: WaitingForAuth, read `%s'", line);
1048 if (g_strcmp0 (line, "AUTH") == 0)
1050 s = get_auth_mechanisms (auth, allow_anonymous, "REJECTED ", "\r\n", " ");
1051 debug_print ("SERVER: writing `%s'", s);
1052 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1060 else if (g_str_has_prefix (line, "AUTH "))
1063 const gchar *encoded;
1064 const gchar *mech_name;
1065 GType auth_mech_to_use_gtype;
1067 tokens = g_strsplit (line, " ", 0);
1070 switch (g_strv_length (tokens))
1073 /* no initial response */
1074 mech_name = tokens[1];
1079 /* initial response */
1080 mech_name = tokens[1];
1081 encoded = tokens[2];
1088 "Unexpected line `%s' while in WaitingForAuth state",
1090 g_strfreev (tokens);
1094 /* TODO: record that the client has attempted to use this mechanism */
1095 //g_debug ("client is trying `%s'", mech_name);
1097 auth_mech_to_use_gtype = find_mech_by_name (auth, mech_name);
1098 if ((auth_mech_to_use_gtype == (GType) 0) ||
1099 (!allow_anonymous && g_strcmp0 (mech_name, "ANONYMOUS") == 0))
1101 /* We don't support this auth mechanism */
1102 g_strfreev (tokens);
1103 s = get_auth_mechanisms (auth, allow_anonymous, "REJECTED ", "\r\n", " ");
1104 debug_print ("SERVER: writing `%s'", s);
1105 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1112 /* stay in WAITING FOR AUTH */
1113 state = SERVER_STATE_WAITING_FOR_AUTH;
1117 gchar *initial_response;
1118 gsize initial_response_len;
1120 mech = g_object_new (auth_mech_to_use_gtype,
1121 "stream", auth->priv->stream,
1122 "credentials", credentials,
1125 initial_response = NULL;
1126 initial_response_len = 0;
1127 if (encoded != NULL)
1129 initial_response = hexdecode (encoded, &initial_response_len, error);
1130 if (initial_response == NULL)
1132 g_prefix_error (error, "Initial response is malformed: ");
1133 /* invalid encoding, disconnect! */
1134 g_strfreev (tokens);
1139 _g_dbus_auth_mechanism_server_initiate (mech,
1141 initial_response_len);
1142 g_free (initial_response);
1143 g_strfreev (tokens);
1146 switch (_g_dbus_auth_mechanism_server_get_state (mech))
1148 case G_DBUS_AUTH_MECHANISM_STATE_ACCEPTED:
1149 if (observer != NULL &&
1150 !g_dbus_auth_observer_authorize_authenticated_peer (observer,
1155 g_set_error_literal (error,
1158 _("Cancelled via GDBusAuthObserver::authorize-authenticated-peer"));
1163 s = g_strdup_printf ("OK %s\r\n", guid);
1164 debug_print ("SERVER: writing `%s'", s);
1165 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1171 state = SERVER_STATE_WAITING_FOR_BEGIN;
1175 case G_DBUS_AUTH_MECHANISM_STATE_REJECTED:
1176 s = get_auth_mechanisms (auth, allow_anonymous, "REJECTED ", "\r\n", " ");
1177 debug_print ("SERVER: writing `%s'", s);
1178 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1184 state = SERVER_STATE_WAITING_FOR_AUTH;
1187 case G_DBUS_AUTH_MECHANISM_STATE_WAITING_FOR_DATA:
1188 state = SERVER_STATE_WAITING_FOR_DATA;
1191 case G_DBUS_AUTH_MECHANISM_STATE_HAVE_DATA_TO_SEND:
1195 gchar *encoded_data;
1196 data = _g_dbus_auth_mechanism_server_data_send (mech, &data_len);
1197 encoded_data = hexencode (data);
1198 s = g_strdup_printf ("DATA %s\r\n", encoded_data);
1199 g_free (encoded_data);
1201 debug_print ("SERVER: writing `%s'", s);
1202 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1214 g_assert_not_reached ();
1224 "Unexpected line `%s' while in WaitingForAuth state",
1231 case SERVER_STATE_WAITING_FOR_DATA:
1232 debug_print ("SERVER: WaitingForData");
1233 line = _my_g_data_input_stream_read_line (dis, &line_length, cancellable, error);
1234 debug_print ("SERVER: WaitingForData, read `%s'", line);
1237 if (g_str_has_prefix (line, "DATA "))
1240 gchar *decoded_data;
1241 gsize decoded_data_len = 0;
1243 encoded = g_strdup (line + 5);
1245 g_strstrip (encoded);
1246 decoded_data = hexdecode (encoded, &decoded_data_len, error);
1248 if (decoded_data == NULL)
1250 g_prefix_error (error, "DATA response is malformed: ");
1251 /* invalid encoding, disconnect! */
1254 _g_dbus_auth_mechanism_server_data_receive (mech, decoded_data, decoded_data_len);
1255 g_free (decoded_data);
1256 /* oh man, this goto-crap is so ugly.. really need to rewrite the state machine */
1264 "Unexpected line `%s' while in WaitingForData state",
1270 case SERVER_STATE_WAITING_FOR_BEGIN:
1271 debug_print ("SERVER: WaitingForBegin");
1272 /* Use extremely slow (but reliable) line reader - this basically
1273 * does a recvfrom() system call per character
1275 * (the problem with using GDataInputStream's read_line is that because of
1276 * buffering it might start reading into the first D-Bus message that
1277 * appears after "BEGIN\r\n"....)
1279 line = _my_g_input_stream_read_line_safe (g_io_stream_get_input_stream (auth->priv->stream),
1283 debug_print ("SERVER: WaitingForBegin, read `%s'", line);
1286 if (g_strcmp0 (line, "BEGIN") == 0)
1293 else if (g_strcmp0 (line, "NEGOTIATE_UNIX_FD") == 0)
1296 if (offered_capabilities & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING)
1298 negotiated_capabilities |= G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING;
1299 s = "AGREE_UNIX_FD\r\n";
1300 debug_print ("SERVER: writing `%s'", s);
1301 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1306 s = "ERROR \"fd passing not offered\"\r\n";
1307 debug_print ("SERVER: writing `%s'", s);
1308 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1314 g_debug ("Unexpected line `%s' while in WaitingForBegin state", line);
1316 s = "ERROR \"Unknown Command\"\r\n";
1317 debug_print ("SERVER: writing `%s'", s);
1318 if (!g_data_output_stream_put_string (dos, s, cancellable, error))
1324 g_assert_not_reached ();
1330 g_set_error_literal (error,
1333 "Not implemented (server)");
1337 g_object_unref (mech);
1339 g_object_unref (dis);
1341 g_object_unref (dos);
1343 /* ensure return value is FALSE if error is set */
1344 if (error != NULL && *error != NULL)
1351 if (out_negotiated_capabilities != NULL)
1352 *out_negotiated_capabilities = negotiated_capabilities;
1353 if (out_received_credentials != NULL)
1354 *out_received_credentials = credentials != NULL ? g_object_ref (credentials) : NULL;
1357 if (credentials != NULL)
1358 g_object_unref (credentials);
1360 debug_print ("SERVER: Done, authenticated=%d", ret);
1365 /* ---------------------------------------------------------------------------------------------------- */