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 /* PAM service to authenticate with */
35 gchar *autologin_pam_service;
37 /* Buffer for data read from greeter */
40 gboolean use_secure_memory;
42 /* Hints for the greeter */
45 /* Default session to use */
46 gchar *default_session;
48 /* Sequence number of current PAM session */
49 guint32 authentication_sequence_number;
51 /* Remote session name */
52 gchar *remote_session;
54 /* PAM session being constructed by the greeter */
55 Session *authentication_session;
57 /* TRUE if a user has been authenticated and the session requested to start */
58 gboolean start_session;
60 /* TRUE if can log into guest accounts */
63 /* TRUE if logging into guest session */
64 gboolean guest_account_authenticated;
66 /* Communication channels to communicate with */
67 GIOChannel *to_greeter_channel;
68 GIOChannel *from_greeter_channel;
71 G_DEFINE_TYPE (Greeter, greeter, SESSION_TYPE);
73 /* Messages from the greeter to the server */
76 GREETER_MESSAGE_CONNECT = 0,
77 GREETER_MESSAGE_AUTHENTICATE,
78 GREETER_MESSAGE_AUTHENTICATE_AS_GUEST,
79 GREETER_MESSAGE_CONTINUE_AUTHENTICATION,
80 GREETER_MESSAGE_START_SESSION,
81 GREETER_MESSAGE_CANCEL_AUTHENTICATION,
82 GREETER_MESSAGE_SET_LANGUAGE,
83 GREETER_MESSAGE_AUTHENTICATE_REMOTE
86 /* Messages from the server to the greeter */
89 SERVER_MESSAGE_CONNECTED = 0,
90 SERVER_MESSAGE_PROMPT_AUTHENTICATION,
91 SERVER_MESSAGE_END_AUTHENTICATION,
92 SERVER_MESSAGE_SESSION_RESULT
95 static gboolean read_cb (GIOChannel *source, GIOCondition condition, gpointer data);
98 greeter_set_pam_services (Greeter *greeter, const gchar *pam_service, const gchar *autologin_pam_service)
100 g_free (greeter->priv->pam_service);
101 greeter->priv->pam_service = g_strdup (pam_service);
102 g_free (greeter->priv->autologin_pam_service);
103 greeter->priv->autologin_pam_service = g_strdup (autologin_pam_service);
107 greeter_set_allow_guest (Greeter *greeter, gboolean allow_guest)
109 greeter->priv->allow_guest = allow_guest;
113 greeter_set_hint (Greeter *greeter, const gchar *name, const gchar *value)
115 g_hash_table_insert (greeter->priv->hints, g_strdup (name), g_strdup (value));
119 secure_malloc (Greeter *greeter, size_t n)
121 if (greeter->priv->use_secure_memory)
122 return gcry_malloc_secure (n);
128 secure_realloc (Greeter *greeter, void *ptr, size_t n)
130 if (greeter->priv->use_secure_memory)
131 return gcry_realloc (ptr, n);
133 return g_realloc (ptr, n);
137 secure_free (Greeter *greeter, void *ptr)
139 if (greeter->priv->use_secure_memory)
140 return gcry_free (ptr);
151 #define HEADER_SIZE (sizeof (guint32) * 2)
152 #define MAX_MESSAGE_LENGTH 1024
155 write_message (Greeter *greeter, guint8 *message, gsize message_length)
157 GError *error = NULL;
159 g_io_channel_write_chars (greeter->priv->to_greeter_channel, (gchar *) message, message_length, NULL, &error);
161 g_warning ("Error writing to greeter: %s", error->message);
162 g_clear_error (&error);
163 g_io_channel_flush (greeter->priv->to_greeter_channel, NULL);
167 write_int (guint8 *buffer, gint buffer_length, guint32 value, gsize *offset)
169 if (*offset + 4 >= buffer_length)
171 buffer[*offset] = value >> 24;
172 buffer[*offset+1] = (value >> 16) & 0xFF;
173 buffer[*offset+2] = (value >> 8) & 0xFF;
174 buffer[*offset+3] = value & 0xFF;
179 write_string (guint8 *buffer, gint buffer_length, const gchar *value, gsize *offset)
184 length = strlen (value);
187 write_int (buffer, buffer_length, length, offset);
188 if (*offset + length >= buffer_length)
192 memcpy (buffer + *offset, value, length);
198 write_header (guint8 *buffer, gint buffer_length, guint32 id, guint32 length, gsize *offset)
200 write_int (buffer, buffer_length, id, offset);
201 write_int (buffer, buffer_length, length, offset);
205 string_length (const gchar *value)
208 return int_length ();
210 return int_length () + strlen (value);
214 handle_connect (Greeter *greeter, const gchar *version)
216 guint8 message[MAX_MESSAGE_LENGTH];
222 g_debug ("Greeter connected version=%s", version);
224 length = string_length (VERSION);
225 g_hash_table_iter_init (&iter, greeter->priv->hints);
226 while (g_hash_table_iter_next (&iter, &key, &value))
227 length += string_length (key) + string_length (value);
229 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_CONNECTED, length, &offset);
230 write_string (message, MAX_MESSAGE_LENGTH, VERSION, &offset);
231 g_hash_table_iter_init (&iter, greeter->priv->hints);
232 while (g_hash_table_iter_next (&iter, &key, &value))
234 write_string (message, MAX_MESSAGE_LENGTH, key, &offset);
235 write_string (message, MAX_MESSAGE_LENGTH, value, &offset);
237 write_message (greeter, message, offset);
239 g_signal_emit (greeter, signals[CONNECTED], 0);
243 pam_messages_cb (Session *session, Greeter *greeter)
247 guint8 message[MAX_MESSAGE_LENGTH];
248 const struct pam_message *messages;
253 messages = session_get_messages (session);
254 messages_length = session_get_messages_length (session);
256 /* Respond to d-bus query with messages */
257 g_debug ("Prompt greeter with %d message(s)", messages_length);
258 size = int_length () + string_length (session_get_username (session)) + int_length ();
259 for (i = 0; i < messages_length; i++)
260 size += int_length () + string_length (messages[i].msg);
262 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_PROMPT_AUTHENTICATION, size, &offset);
263 write_int (message, MAX_MESSAGE_LENGTH, greeter->priv->authentication_sequence_number, &offset);
264 write_string (message, MAX_MESSAGE_LENGTH, session_get_username (session), &offset);
265 write_int (message, MAX_MESSAGE_LENGTH, messages_length, &offset);
266 for (i = 0; i < messages_length; i++)
268 write_int (message, MAX_MESSAGE_LENGTH, messages[i].msg_style, &offset);
269 write_string (message, MAX_MESSAGE_LENGTH, messages[i].msg, &offset);
271 if (messages[i].msg_style == PAM_PROMPT_ECHO_OFF || messages[i].msg_style == PAM_PROMPT_ECHO_ON)
274 write_message (greeter, message, offset);
276 /* Continue immediately if nothing to respond with */
277 // FIXME: Should probably give the greeter a chance to ack the message
280 struct pam_response *response;
281 response = calloc (messages_length, sizeof (struct pam_response));
282 session_respond (greeter->priv->authentication_session, response);
288 send_end_authentication (Greeter *greeter, guint32 sequence_number, const gchar *username, int result)
290 guint8 message[MAX_MESSAGE_LENGTH];
293 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_END_AUTHENTICATION, int_length () + string_length (username) + int_length (), &offset);
294 write_int (message, MAX_MESSAGE_LENGTH, sequence_number, &offset);
295 write_string (message, MAX_MESSAGE_LENGTH, username, &offset);
296 write_int (message, MAX_MESSAGE_LENGTH, result, &offset);
297 write_message (greeter, message, offset);
301 authentication_complete_cb (Session *session, Greeter *greeter)
305 g_debug ("Authenticate result for user %s: %s", session_get_username (session), session_get_authentication_result_string (session));
307 result = session_get_authentication_result (session);
308 if (session_get_is_authenticated (session))
310 if (session_get_user (session))
311 g_debug ("User %s authorized", session_get_username (session));
314 g_debug ("User %s authorized, but no account of that name exists", session_get_username (session));
315 result = PAM_USER_UNKNOWN;
319 send_end_authentication (greeter, greeter->priv->authentication_sequence_number, session_get_username (session), result);
323 reset_session (Greeter *greeter)
325 g_free (greeter->priv->remote_session);
326 greeter->priv->remote_session = NULL;
327 if (greeter->priv->authentication_session)
329 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
330 session_stop (greeter->priv->authentication_session);
331 g_object_unref (greeter->priv->authentication_session);
332 greeter->priv->authentication_session = NULL;
335 greeter->priv->guest_account_authenticated = FALSE;
339 handle_login (Greeter *greeter, guint32 sequence_number, const gchar *username)
341 const gchar *autologin_username, *service;
342 gboolean is_interactive;
344 if (username[0] == '\0')
346 g_debug ("Greeter start authentication");
350 g_debug ("Greeter start authentication for %s", username);
352 reset_session (greeter);
354 greeter->priv->authentication_sequence_number = sequence_number;
355 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
356 if (!greeter->priv->authentication_session)
358 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
362 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
363 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
365 /* Use non-interactive service for autologin user */
366 autologin_username = g_hash_table_lookup (greeter->priv->hints, "autologin-user");
367 if (autologin_username != NULL && g_strcmp0 (username, autologin_username) == 0)
369 service = greeter->priv->autologin_pam_service;
370 is_interactive = FALSE;
374 service = greeter->priv->pam_service;
375 is_interactive = TRUE;
378 /* Run the session process */
379 session_set_pam_service (greeter->priv->authentication_session, service);
380 session_set_username (greeter->priv->authentication_session, username);
381 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
382 session_set_is_interactive (greeter->priv->authentication_session, is_interactive);
383 session_start (greeter->priv->authentication_session);
387 handle_login_as_guest (Greeter *greeter, guint32 sequence_number)
389 g_debug ("Greeter start authentication for guest account");
391 reset_session (greeter);
393 if (!greeter->priv->allow_guest)
395 g_debug ("Guest account is disabled");
396 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
400 greeter->priv->guest_account_authenticated = TRUE;
401 send_end_authentication (greeter, sequence_number, "", PAM_SUCCESS);
405 get_remote_session_service (const gchar *session_name)
407 GKeyFile *session_desktop_file;
410 gchar *remote_sessions_dir, *filename, *path, *service = NULL;
411 GError *error = NULL;
413 /* Validate session name doesn't contain directory separators */
414 for (c = session_name; *c; c++)
420 /* Load the session file */
421 session_desktop_file = g_key_file_new ();
422 filename = g_strdup_printf ("%s.desktop", session_name);
423 remote_sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
424 path = g_build_filename (remote_sessions_dir, filename, NULL);
425 g_free (remote_sessions_dir);
427 result = g_key_file_load_from_file (session_desktop_file, path, G_KEY_FILE_NONE, &error);
429 g_debug ("Failed to load session file %s: %s", path, error->message);
431 g_clear_error (&error);
433 service = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, "X-LightDM-PAM-Service", NULL);
434 g_key_file_free (session_desktop_file);
440 handle_login_remote (Greeter *greeter, const gchar *session_name, const gchar *username, guint32 sequence_number)
444 if (username[0] == '\0')
446 g_debug ("Greeter start authentication for remote session %s", session_name);
450 g_debug ("Greeter start authentication for remote session %s as user %s", session_name, username);
452 reset_session (greeter);
454 service = get_remote_session_service (session_name);
457 send_end_authentication (greeter, sequence_number, "", PAM_SYSTEM_ERR);
461 greeter->priv->authentication_sequence_number = sequence_number;
462 greeter->priv->remote_session = g_strdup (session_name);
463 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
464 if (greeter->priv->authentication_session)
466 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
467 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
469 /* Run the session process */
470 session_set_pam_service (greeter->priv->authentication_session, service);
471 session_set_username (greeter->priv->authentication_session, username);
472 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
473 session_set_is_interactive (greeter->priv->authentication_session, TRUE);
474 session_set_is_guest (greeter->priv->authentication_session, TRUE);
475 session_start (greeter->priv->authentication_session);
480 if (!greeter->priv->authentication_session)
482 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
488 handle_continue_authentication (Greeter *greeter, gchar **secrets)
491 const struct pam_message *messages;
492 struct pam_response *response;
493 int i, j, n_prompts = 0;
495 /* Not in authentication */
496 if (greeter->priv->authentication_session == NULL)
499 messages_length = session_get_messages_length (greeter->priv->authentication_session);
500 messages = session_get_messages (greeter->priv->authentication_session);
502 /* Check correct number of responses */
503 for (i = 0; i < messages_length; i++)
505 int msg_style = messages[i].msg_style;
506 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
509 if (g_strv_length (secrets) != n_prompts)
511 session_respond_error (greeter->priv->authentication_session, PAM_CONV_ERR);
515 g_debug ("Continue authentication");
518 response = calloc (messages_length, sizeof (struct pam_response));
519 for (i = 0, j = 0; i < messages_length; i++)
521 int msg_style = messages[i].msg_style;
522 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
524 size_t secret_length = strlen (secrets[j]) + 1;
525 response[i].resp = secure_malloc (greeter, secret_length);
526 memcpy (response[i].resp, secrets[j], secret_length); // FIXME: Need to convert from UTF-8
531 session_respond (greeter->priv->authentication_session, response);
533 for (i = 0; i < messages_length; i++)
534 secure_free (greeter, response[i].resp);
539 handle_cancel_authentication (Greeter *greeter)
541 /* Not in authentication */
542 if (greeter->priv->authentication_session == NULL)
545 g_debug ("Cancel authentication");
546 reset_session (greeter);
550 handle_start_session (Greeter *greeter, SessionType session_type, const gchar *session)
553 guint8 message[MAX_MESSAGE_LENGTH];
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_TYPE_LOCAL, 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 (Session *session)
822 Greeter *greeter = GREETER (session);
823 int to_greeter_pipe[2], from_greeter_pipe[2];
824 gboolean result = FALSE;
827 /* Create a pipe to talk with the greeter */
828 if (pipe (to_greeter_pipe) != 0 || pipe (from_greeter_pipe) != 0)
830 g_warning ("Failed to create pipes: %s", strerror (errno));
833 greeter->priv->to_greeter_channel = g_io_channel_unix_new (to_greeter_pipe[1]);
834 g_io_channel_set_encoding (greeter->priv->to_greeter_channel, NULL, NULL);
835 greeter->priv->from_greeter_channel = g_io_channel_unix_new (from_greeter_pipe[0]);
836 g_io_channel_set_encoding (greeter->priv->from_greeter_channel, NULL, NULL);
837 g_io_channel_set_buffered (greeter->priv->from_greeter_channel, FALSE);
838 g_io_add_watch (greeter->priv->from_greeter_channel, G_IO_IN | G_IO_HUP, read_cb, greeter);
840 /* Let the greeter session know how to communicate with the daemon */
841 value = g_strdup_printf ("%d", from_greeter_pipe[1]);
842 session_set_env (SESSION (greeter), "LIGHTDM_TO_SERVER_FD", value);
844 value = g_strdup_printf ("%d", to_greeter_pipe[0]);
845 session_set_env (SESSION (greeter), "LIGHTDM_FROM_SERVER_FD", value);
848 /* Don't allow the daemon end of the pipes to be accessed in child processes */
849 fcntl (to_greeter_pipe[1], F_SETFD, FD_CLOEXEC);
850 fcntl (from_greeter_pipe[0], F_SETFD, FD_CLOEXEC);
852 result = SESSION_CLASS (greeter_parent_class)->start (session);
854 /* Close the session ends of the pipe */
855 close (to_greeter_pipe[0]);
856 close (from_greeter_pipe[1]);
862 greeter_real_create_session (Greeter *greeter)
868 greeter_real_start_session (Greeter *greeter, SessionType type, const gchar *session)
874 greeter_stop (Session *session)
876 Greeter *greeter = GREETER (session);
878 /* Stop any events occurring after we've stopped */
879 if (greeter->priv->authentication_session)
880 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
882 SESSION_CLASS (greeter_parent_class)->stop (session);
886 greeter_init (Greeter *greeter)
888 greeter->priv = G_TYPE_INSTANCE_GET_PRIVATE (greeter, GREETER_TYPE, GreeterPrivate);
889 greeter->priv->read_buffer = secure_malloc (greeter, HEADER_SIZE);
890 greeter->priv->hints = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
891 greeter->priv->use_secure_memory = config_get_boolean (config_get_instance (), "LightDM", "lock-memory");
895 greeter_finalize (GObject *object)
899 self = GREETER (object);
901 g_free (self->priv->pam_service);
902 g_free (self->priv->autologin_pam_service);
903 secure_free (self, self->priv->read_buffer);
904 g_hash_table_unref (self->priv->hints);
905 g_free (self->priv->remote_session);
906 if (self->priv->authentication_session)
908 g_signal_handlers_disconnect_matched (self->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
909 g_object_unref (self->priv->authentication_session);
911 if (self->priv->to_greeter_channel)
912 g_io_channel_unref (self->priv->to_greeter_channel);
913 if (self->priv->from_greeter_channel)
914 g_io_channel_unref (self->priv->from_greeter_channel);
916 G_OBJECT_CLASS (greeter_parent_class)->finalize (object);
920 greeter_class_init (GreeterClass *klass)
922 SessionClass *session_class = SESSION_CLASS (klass);
923 GObjectClass *object_class = G_OBJECT_CLASS (klass);
925 klass->create_session = greeter_real_create_session;
926 klass->start_session = greeter_real_start_session;
927 session_class->start = greeter_start;
928 session_class->stop = greeter_stop;
929 object_class->finalize = greeter_finalize;
932 g_signal_new ("connected",
933 G_TYPE_FROM_CLASS (klass),
935 G_STRUCT_OFFSET (GreeterClass, connected),
940 signals[CREATE_SESSION] =
941 g_signal_new ("create-session",
942 G_TYPE_FROM_CLASS (klass),
944 G_STRUCT_OFFSET (GreeterClass, create_session),
945 g_signal_accumulator_first_wins,
950 signals[START_SESSION] =
951 g_signal_new ("start-session",
952 G_TYPE_FROM_CLASS (klass),
954 G_STRUCT_OFFSET (GreeterClass, start_session),
955 g_signal_accumulator_true_handled,
958 G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_STRING);
960 g_type_class_add_private (klass, sizeof (GreeterPrivate));