2 * Copyright (C) 2010-2011 Robert Ancell.
3 * Author: Robert Ancell <robert.ancell@canonical.com>
5 * This program is free software: you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option) any later
8 * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
21 #include "configuration.h"
29 static guint signals[LAST_SIGNAL] = { 0 };
33 /* Session running on */
36 /* PAM service to authenticate with */
38 gchar *autologin_pam_service;
40 /* Buffer for data read from greeter */
43 gboolean use_secure_memory;
45 /* Hints for the greeter */
48 /* Default session to use */
49 gchar *default_session;
51 /* Sequence number of current PAM session */
52 guint32 authentication_sequence_number;
54 /* Remote session name */
55 gchar *remote_session;
57 /* PAM session being constructed by the greeter */
58 Session *authentication_session;
60 /* TRUE if a user has been authenticated and the session requested to start */
61 gboolean start_session;
63 /* TRUE if can log into guest accounts */
66 /* TRUE if logging into guest session */
67 gboolean guest_account_authenticated;
69 /* Communication channels to communicate with */
70 GIOChannel *to_greeter_channel;
71 GIOChannel *from_greeter_channel;
74 G_DEFINE_TYPE (Greeter, greeter, G_TYPE_OBJECT);
76 /* Messages from the greeter to the server */
79 GREETER_MESSAGE_CONNECT = 0,
80 GREETER_MESSAGE_AUTHENTICATE,
81 GREETER_MESSAGE_AUTHENTICATE_AS_GUEST,
82 GREETER_MESSAGE_CONTINUE_AUTHENTICATION,
83 GREETER_MESSAGE_START_SESSION,
84 GREETER_MESSAGE_CANCEL_AUTHENTICATION,
85 GREETER_MESSAGE_SET_LANGUAGE,
86 GREETER_MESSAGE_AUTHENTICATE_REMOTE
89 /* Messages from the server to the greeter */
92 SERVER_MESSAGE_CONNECTED = 0,
93 SERVER_MESSAGE_PROMPT_AUTHENTICATION,
94 SERVER_MESSAGE_END_AUTHENTICATION,
95 SERVER_MESSAGE_SESSION_RESULT
98 static gboolean read_cb (GIOChannel *source, GIOCondition condition, gpointer data);
101 greeter_new (Session *session, const gchar *pam_service, const gchar *autologin_pam_service)
105 greeter = g_object_new (GREETER_TYPE, NULL);
106 greeter->priv->session = g_object_ref (session);
107 greeter->priv->pam_service = g_strdup (pam_service);
108 greeter->priv->autologin_pam_service = g_strdup (autologin_pam_service);
109 greeter->priv->use_secure_memory = config_get_boolean (config_get_instance (), "LightDM", "lock-memory");
115 greeter_set_allow_guest (Greeter *greeter, gboolean allow_guest)
117 greeter->priv->allow_guest = allow_guest;
121 greeter_set_hint (Greeter *greeter, const gchar *name, const gchar *value)
123 g_hash_table_insert (greeter->priv->hints, g_strdup (name), g_strdup (value));
127 secure_malloc (Greeter *greeter, size_t n)
129 if (greeter->priv->use_secure_memory)
130 return gcry_malloc_secure (n);
136 secure_realloc (Greeter *greeter, void *ptr, size_t n)
138 if (greeter->priv->use_secure_memory)
139 return gcry_realloc (ptr, n);
141 return g_realloc (ptr, n);
145 secure_free (Greeter *greeter, void *ptr)
147 if (greeter->priv->use_secure_memory)
148 return gcry_free (ptr);
159 #define HEADER_SIZE (sizeof (guint32) * 2)
160 #define MAX_MESSAGE_LENGTH 1024
163 write_message (Greeter *greeter, guint8 *message, gsize message_length)
165 GError *error = NULL;
167 g_io_channel_write_chars (greeter->priv->to_greeter_channel, (gchar *) message, message_length, NULL, &error);
169 g_warning ("Error writing to greeter: %s", error->message);
170 g_clear_error (&error);
171 g_io_channel_flush (greeter->priv->to_greeter_channel, NULL);
175 write_int (guint8 *buffer, gint buffer_length, guint32 value, gsize *offset)
177 if (*offset + 4 >= buffer_length)
179 buffer[*offset] = value >> 24;
180 buffer[*offset+1] = (value >> 16) & 0xFF;
181 buffer[*offset+2] = (value >> 8) & 0xFF;
182 buffer[*offset+3] = value & 0xFF;
187 write_string (guint8 *buffer, gint buffer_length, const gchar *value, gsize *offset)
192 length = strlen (value);
195 write_int (buffer, buffer_length, length, offset);
196 if (*offset + length >= buffer_length)
200 memcpy (buffer + *offset, value, length);
206 write_header (guint8 *buffer, gint buffer_length, guint32 id, guint32 length, gsize *offset)
208 write_int (buffer, buffer_length, id, offset);
209 write_int (buffer, buffer_length, length, offset);
213 string_length (const gchar *value)
216 return int_length ();
218 return int_length () + strlen (value);
222 handle_connect (Greeter *greeter, const gchar *version)
224 guint8 message[MAX_MESSAGE_LENGTH];
230 g_debug ("Greeter connected version=%s", version);
232 length = string_length (VERSION);
233 g_hash_table_iter_init (&iter, greeter->priv->hints);
234 while (g_hash_table_iter_next (&iter, &key, &value))
235 length += string_length (key) + string_length (value);
237 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_CONNECTED, length, &offset);
238 write_string (message, MAX_MESSAGE_LENGTH, VERSION, &offset);
239 g_hash_table_iter_init (&iter, greeter->priv->hints);
240 while (g_hash_table_iter_next (&iter, &key, &value))
242 write_string (message, MAX_MESSAGE_LENGTH, key, &offset);
243 write_string (message, MAX_MESSAGE_LENGTH, value, &offset);
245 write_message (greeter, message, offset);
247 g_signal_emit (greeter, signals[CONNECTED], 0);
251 pam_messages_cb (Session *session, Greeter *greeter)
255 guint8 message[MAX_MESSAGE_LENGTH];
256 const struct pam_message *messages;
261 messages = session_get_messages (session);
262 messages_length = session_get_messages_length (session);
264 /* Respond to d-bus query with messages */
265 g_debug ("Prompt greeter with %d message(s)", messages_length);
266 size = int_length () + string_length (session_get_username (session)) + int_length ();
267 for (i = 0; i < messages_length; i++)
268 size += int_length () + string_length (messages[i].msg);
270 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_PROMPT_AUTHENTICATION, size, &offset);
271 write_int (message, MAX_MESSAGE_LENGTH, greeter->priv->authentication_sequence_number, &offset);
272 write_string (message, MAX_MESSAGE_LENGTH, session_get_username (session), &offset);
273 write_int (message, MAX_MESSAGE_LENGTH, messages_length, &offset);
274 for (i = 0; i < messages_length; i++)
276 write_int (message, MAX_MESSAGE_LENGTH, messages[i].msg_style, &offset);
277 write_string (message, MAX_MESSAGE_LENGTH, messages[i].msg, &offset);
279 if (messages[i].msg_style == PAM_PROMPT_ECHO_OFF || messages[i].msg_style == PAM_PROMPT_ECHO_ON)
282 write_message (greeter, message, offset);
284 /* Continue immediately if nothing to respond with */
285 // FIXME: Should probably give the greeter a chance to ack the message
288 struct pam_response *response;
289 response = calloc (messages_length, sizeof (struct pam_response));
290 session_respond (greeter->priv->authentication_session, response);
296 send_end_authentication (Greeter *greeter, guint32 sequence_number, const gchar *username, int result)
298 guint8 message[MAX_MESSAGE_LENGTH];
301 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_END_AUTHENTICATION, int_length () + string_length (username) + int_length (), &offset);
302 write_int (message, MAX_MESSAGE_LENGTH, sequence_number, &offset);
303 write_string (message, MAX_MESSAGE_LENGTH, username, &offset);
304 write_int (message, MAX_MESSAGE_LENGTH, result, &offset);
305 write_message (greeter, message, offset);
309 authentication_complete_cb (Session *session, Greeter *greeter)
313 g_debug ("Authenticate result for user %s: %s", session_get_username (session), session_get_authentication_result_string (session));
315 result = session_get_authentication_result (session);
316 if (session_get_is_authenticated (session))
318 if (session_get_user (session))
319 g_debug ("User %s authorized", session_get_username (session));
322 g_debug ("User %s authorized, but no account of that name exists", session_get_username (session));
323 result = PAM_USER_UNKNOWN;
327 send_end_authentication (greeter, greeter->priv->authentication_sequence_number, session_get_username (session), result);
331 reset_session (Greeter *greeter)
333 g_free (greeter->priv->remote_session);
334 greeter->priv->remote_session = NULL;
335 if (greeter->priv->authentication_session)
337 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
338 session_stop (greeter->priv->authentication_session);
339 g_object_unref (greeter->priv->authentication_session);
340 greeter->priv->authentication_session = NULL;
343 greeter->priv->guest_account_authenticated = FALSE;
347 handle_login (Greeter *greeter, guint32 sequence_number, const gchar *username)
349 const gchar *autologin_username, *service;
350 gboolean is_interactive;
352 if (username[0] == '\0')
354 g_debug ("Greeter start authentication");
358 g_debug ("Greeter start authentication for %s", username);
360 reset_session (greeter);
362 greeter->priv->authentication_sequence_number = sequence_number;
363 g_signal_emit (greeter, signals[START_AUTHENTICATION], 0, username, &greeter->priv->authentication_session);
364 if (!greeter->priv->authentication_session)
366 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
370 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
371 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
373 /* Use non-interactive service for autologin user */
374 autologin_username = g_hash_table_lookup (greeter->priv->hints, "autologin-user");
375 if (autologin_username != NULL && g_strcmp0 (username, autologin_username) == 0)
377 service = greeter->priv->autologin_pam_service;
378 is_interactive = FALSE;
382 service = greeter->priv->pam_service;
383 is_interactive = TRUE;
386 /* Run the session process */
387 session_start (greeter->priv->authentication_session, service, username, TRUE, is_interactive, FALSE);
391 handle_login_as_guest (Greeter *greeter, guint32 sequence_number)
393 g_debug ("Greeter start authentication for guest account");
395 reset_session (greeter);
397 if (!greeter->priv->allow_guest)
399 g_debug ("Guest account is disabled");
400 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
404 greeter->priv->guest_account_authenticated = TRUE;
405 send_end_authentication (greeter, sequence_number, "", PAM_SUCCESS);
409 get_remote_session_service (const gchar *session_name)
411 GKeyFile *session_desktop_file;
414 gchar *remote_sessions_dir, *filename, *path, *service = NULL;
415 GError *error = NULL;
417 /* Validate session name doesn't contain directory separators */
418 for (c = session_name; *c; c++)
424 /* Load the session file */
425 session_desktop_file = g_key_file_new ();
426 filename = g_strdup_printf ("%s.desktop", session_name);
427 remote_sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
428 path = g_build_filename (remote_sessions_dir, filename, NULL);
429 g_free (remote_sessions_dir);
431 result = g_key_file_load_from_file (session_desktop_file, path, G_KEY_FILE_NONE, &error);
433 g_debug ("Failed to load session file %s: %s", path, error->message);
435 g_clear_error (&error);
437 service = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, "X-LightDM-PAM-Service", NULL);
438 g_key_file_free (session_desktop_file);
444 handle_login_remote (Greeter *greeter, const gchar *session_name, const gchar *username, guint32 sequence_number)
448 if (username[0] == '\0')
450 g_debug ("Greeter start authentication for remote session %s", session_name);
454 g_debug ("Greeter start authentication for remote session %s as user %s", session_name, username);
456 reset_session (greeter);
458 service = get_remote_session_service (session_name);
461 send_end_authentication (greeter, sequence_number, "", PAM_SYSTEM_ERR);
465 greeter->priv->authentication_sequence_number = sequence_number;
466 greeter->priv->remote_session = g_strdup (session_name);
467 g_signal_emit (greeter, signals[START_AUTHENTICATION], 0, username, &greeter->priv->authentication_session);
468 if (greeter->priv->authentication_session)
470 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
471 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
473 /* Run the session process */
474 session_start (greeter->priv->authentication_session, service, username, TRUE, TRUE, TRUE);
479 if (!greeter->priv->authentication_session)
481 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
487 handle_continue_authentication (Greeter *greeter, gchar **secrets)
490 const struct pam_message *messages;
491 struct pam_response *response;
492 int i, j, n_prompts = 0;
494 /* Not in authentication */
495 if (greeter->priv->authentication_session == NULL)
498 messages_length = session_get_messages_length (greeter->priv->authentication_session);
499 messages = session_get_messages (greeter->priv->authentication_session);
501 /* Check correct number of responses */
502 for (i = 0; i < messages_length; i++)
504 int msg_style = messages[i].msg_style;
505 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
508 if (g_strv_length (secrets) != n_prompts)
510 session_respond_error (greeter->priv->authentication_session, PAM_CONV_ERR);
514 g_debug ("Continue authentication");
517 response = calloc (messages_length, sizeof (struct pam_response));
518 for (i = 0, j = 0; i < messages_length; i++)
520 int msg_style = messages[i].msg_style;
521 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
523 size_t secret_length = strlen (secrets[j]) + 1;
524 response[i].resp = secure_malloc (greeter, secret_length);
525 memcpy (response[i].resp, secrets[j], secret_length); // FIXME: Need to convert from UTF-8
530 session_respond (greeter->priv->authentication_session, response);
532 for (i = 0; i < messages_length; i++)
533 secure_free (greeter, response[i].resp);
538 handle_cancel_authentication (Greeter *greeter)
540 /* Not in authentication */
541 if (greeter->priv->authentication_session == NULL)
544 g_debug ("Cancel authentication");
545 reset_session (greeter);
549 handle_start_session (Greeter *greeter, const gchar *session)
552 guint8 message[MAX_MESSAGE_LENGTH];
554 SessionType session_type = SESSION_TYPE_LOCAL;
556 if (strcmp (session, "") == 0)
559 /* Use session type chosen in remote session */
560 if (greeter->priv->remote_session)
562 session_type = SESSION_TYPE_REMOTE;
563 session = greeter->priv->remote_session;
566 if (greeter->priv->guest_account_authenticated || session_get_is_authenticated (greeter->priv->authentication_session))
569 g_debug ("Greeter requests session %s", session);
571 g_debug ("Greeter requests default session");
572 greeter->priv->start_session = TRUE;
573 g_signal_emit (greeter, signals[START_SESSION], 0, session_type, session, &result);
577 g_debug ("Ignoring start session request, user is not authorized");
581 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_SESSION_RESULT, int_length (), &offset);
582 write_int (message, MAX_MESSAGE_LENGTH, result ? 0 : 1, &offset);
583 write_message (greeter, message, offset);
587 handle_set_language (Greeter *greeter, const gchar *language)
591 if (!greeter->priv->guest_account_authenticated && !session_get_is_authenticated (greeter->priv->authentication_session))
593 g_debug ("Ignoring set language request, user is not authorized");
597 // FIXME: Could use this
598 if (greeter->priv->guest_account_authenticated)
600 g_debug ("Ignoring set language request for guest user");
604 g_debug ("Greeter sets language %s", language);
605 user = session_get_user (greeter->priv->authentication_session);
606 user_set_language (user, language);
610 read_int (Greeter *greeter, gsize *offset)
614 if (greeter->priv->n_read - *offset < sizeof (guint32))
616 g_warning ("Not enough space for int, need %zu, got %zu", sizeof (guint32), greeter->priv->n_read - *offset);
619 buffer = greeter->priv->read_buffer + *offset;
620 value = buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
621 *offset += int_length ();
626 get_message_length (Greeter *greeter)
631 offset = int_length ();
632 payload_length = read_int (greeter, &offset);
634 if (HEADER_SIZE + payload_length < HEADER_SIZE)
636 g_warning ("Payload length of %u octets too long", payload_length);
640 return HEADER_SIZE + payload_length;
644 read_string_full (Greeter *greeter, gsize *offset, void* (*alloc_fn)(size_t n))
649 length = read_int (greeter, offset);
650 if (greeter->priv->n_read - *offset < length)
652 g_warning ("Not enough space for string, need %u, got %zu", length, greeter->priv->n_read - *offset);
653 return g_strdup ("");
656 value = (*alloc_fn) (sizeof (gchar *) * (length + 1));
657 memcpy (value, greeter->priv->read_buffer + *offset, length);
658 value[length] = '\0';
665 read_string (Greeter *greeter, gsize *offset)
667 return read_string_full (greeter, offset, g_malloc);
671 read_secret (Greeter *greeter, gsize *offset)
673 if (greeter->priv->use_secure_memory)
674 return read_string_full (greeter, offset, gcry_malloc_secure);
676 return read_string_full (greeter, offset, g_malloc);
680 read_cb (GIOChannel *source, GIOCondition condition, gpointer data)
682 Greeter *greeter = data;
683 gsize n_to_read, n_read, offset;
686 guint32 sequence_number, n_secrets, max_secrets;
687 gchar *version, *username, *session_name, *language;
689 GError *error = NULL;
691 if (condition == G_IO_HUP)
693 g_debug ("Greeter closed communication channel");
697 n_to_read = HEADER_SIZE;
698 if (greeter->priv->n_read >= HEADER_SIZE)
700 n_to_read = get_message_length (greeter);
701 if (n_to_read <= HEADER_SIZE)
705 status = g_io_channel_read_chars (greeter->priv->from_greeter_channel,
706 (gchar *) greeter->priv->read_buffer + greeter->priv->n_read,
707 n_to_read - greeter->priv->n_read,
711 g_warning ("Error reading from greeter: %s", error->message);
712 g_clear_error (&error);
713 if (status != G_IO_STATUS_NORMAL)
716 greeter->priv->n_read += n_read;
717 if (greeter->priv->n_read != n_to_read)
720 /* If have header, rerun for content */
721 if (greeter->priv->n_read == HEADER_SIZE)
723 n_to_read = get_message_length (greeter);
724 if (n_to_read > HEADER_SIZE)
726 greeter->priv->read_buffer = secure_realloc (greeter, greeter->priv->read_buffer, n_to_read);
727 read_cb (source, condition, greeter);
733 id = read_int (greeter, &offset);
734 read_int (greeter, &offset);
737 case GREETER_MESSAGE_CONNECT:
738 version = read_string (greeter, &offset);
739 handle_connect (greeter, version);
742 case GREETER_MESSAGE_AUTHENTICATE:
743 sequence_number = read_int (greeter, &offset);
744 username = read_string (greeter, &offset);
745 handle_login (greeter, sequence_number, username);
748 case GREETER_MESSAGE_AUTHENTICATE_AS_GUEST:
749 sequence_number = read_int (greeter, &offset);
750 handle_login_as_guest (greeter, sequence_number);
752 case GREETER_MESSAGE_AUTHENTICATE_REMOTE:
753 sequence_number = read_int (greeter, &offset);
754 session_name = read_string (greeter, &offset);
755 username = read_string (greeter, &offset);
756 handle_login_remote (greeter, session_name, username, sequence_number);
758 case GREETER_MESSAGE_CONTINUE_AUTHENTICATION:
759 n_secrets = read_int (greeter, &offset);
760 max_secrets = (G_MAXUINT32 - 1) / sizeof (gchar *);
761 if (n_secrets > max_secrets)
763 g_warning ("Array length of %u elements too long", n_secrets);
766 secrets = g_malloc (sizeof (gchar *) * (n_secrets + 1));
767 for (i = 0; i < n_secrets; i++)
768 secrets[i] = read_secret (greeter, &offset);
770 handle_continue_authentication (greeter, secrets);
771 for (i = 0; i < n_secrets; i++)
772 secure_free (greeter, secrets[i]);
775 case GREETER_MESSAGE_CANCEL_AUTHENTICATION:
776 handle_cancel_authentication (greeter);
778 case GREETER_MESSAGE_START_SESSION:
779 session_name = read_string (greeter, &offset);
780 handle_start_session (greeter, session_name);
781 g_free (session_name);
783 case GREETER_MESSAGE_SET_LANGUAGE:
784 language = read_string (greeter, &offset);
785 handle_set_language (greeter, language);
789 g_warning ("Unknown message from greeter: %d", id);
793 greeter->priv->n_read = 0;
799 greeter_get_guest_authenticated (Greeter *greeter)
801 g_return_val_if_fail (greeter != NULL, FALSE);
802 return greeter->priv->guest_account_authenticated;
806 greeter_get_authentication_session (Greeter *greeter)
808 g_return_val_if_fail (greeter != NULL, NULL);
809 return greeter->priv->authentication_session;
813 greeter_get_start_session (Greeter *greeter)
815 g_return_val_if_fail (greeter != NULL, FALSE);
816 return greeter->priv->start_session;
820 greeter_start (Greeter *greeter, const gchar *service, const gchar *username)
822 int to_greeter_pipe[2], from_greeter_pipe[2];
823 gboolean result = FALSE;
826 /* Create a pipe to talk with the greeter */
827 if (pipe (to_greeter_pipe) != 0 || pipe (from_greeter_pipe) != 0)
829 g_warning ("Failed to create pipes: %s", strerror (errno));
832 greeter->priv->to_greeter_channel = g_io_channel_unix_new (to_greeter_pipe[1]);
833 g_io_channel_set_encoding (greeter->priv->to_greeter_channel, NULL, NULL);
834 greeter->priv->from_greeter_channel = g_io_channel_unix_new (from_greeter_pipe[0]);
835 g_io_channel_set_encoding (greeter->priv->from_greeter_channel, NULL, NULL);
836 g_io_channel_set_buffered (greeter->priv->from_greeter_channel, FALSE);
837 g_io_add_watch (greeter->priv->from_greeter_channel, G_IO_IN | G_IO_HUP, read_cb, greeter);
839 /* Let the greeter session know how to communicate with the daemon */
840 value = g_strdup_printf ("%d", from_greeter_pipe[1]);
841 session_set_env (greeter->priv->session, "LIGHTDM_TO_SERVER_FD", value);
843 value = g_strdup_printf ("%d", to_greeter_pipe[0]);
844 session_set_env (greeter->priv->session, "LIGHTDM_FROM_SERVER_FD", value);
847 /* Don't allow the daemon end of the pipes to be accessed in child processes */
848 fcntl (to_greeter_pipe[1], F_SETFD, FD_CLOEXEC);
849 fcntl (from_greeter_pipe[0], F_SETFD, FD_CLOEXEC);
851 result = session_start (greeter->priv->session, service, username, FALSE, FALSE, FALSE);
853 /* Close the session ends of the pipe */
854 close (to_greeter_pipe[0]);
855 close (from_greeter_pipe[1]);
861 greeter_real_start_authentication (Greeter *greeter, const gchar *username)
867 greeter_real_start_session (Greeter *greeter, SessionType type, const gchar *session)
873 greeter_init (Greeter *greeter)
875 greeter->priv = G_TYPE_INSTANCE_GET_PRIVATE (greeter, GREETER_TYPE, GreeterPrivate);
876 greeter->priv->read_buffer = secure_malloc (greeter, HEADER_SIZE);
877 greeter->priv->hints = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
881 greeter_finalize (GObject *object)
885 self = GREETER (object);
887 g_signal_handlers_disconnect_matched (self->priv->session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
888 g_object_unref (self->priv->session);
889 g_free (self->priv->pam_service);
890 g_free (self->priv->autologin_pam_service);
891 secure_free (self, self->priv->read_buffer);
892 g_hash_table_unref (self->priv->hints);
893 g_free (self->priv->remote_session);
894 if (self->priv->authentication_session)
896 g_signal_handlers_disconnect_matched (self->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
897 g_object_unref (self->priv->authentication_session);
899 if (self->priv->to_greeter_channel)
900 g_io_channel_unref (self->priv->to_greeter_channel);
901 if (self->priv->from_greeter_channel)
902 g_io_channel_unref (self->priv->from_greeter_channel);
904 G_OBJECT_CLASS (greeter_parent_class)->finalize (object);
908 greeter_class_init (GreeterClass *klass)
910 GObjectClass *object_class = G_OBJECT_CLASS (klass);
912 klass->start_authentication = greeter_real_start_authentication;
913 klass->start_session = greeter_real_start_session;
914 object_class->finalize = greeter_finalize;
917 g_signal_new ("connected",
918 G_TYPE_FROM_CLASS (klass),
920 G_STRUCT_OFFSET (GreeterClass, connected),
925 signals[START_AUTHENTICATION] =
926 g_signal_new ("start-authentication",
927 G_TYPE_FROM_CLASS (klass),
929 G_STRUCT_OFFSET (GreeterClass, start_authentication),
930 g_signal_accumulator_first_wins,
933 SESSION_TYPE, 1, G_TYPE_STRING);
935 signals[START_SESSION] =
936 g_signal_new ("start-session",
937 G_TYPE_FROM_CLASS (klass),
939 G_STRUCT_OFFSET (GreeterClass, start_session),
940 g_signal_accumulator_true_handled,
943 G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_STRING);
945 g_type_class_add_private (klass, sizeof (GreeterPrivate));