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);
100 return g_object_new (GREETER_TYPE, NULL);
104 greeter_set_pam_services (Greeter *greeter, const gchar *pam_service, const gchar *autologin_pam_service)
106 g_free (greeter->priv->pam_service);
107 greeter->priv->pam_service = g_strdup (pam_service);
108 g_free (greeter->priv->autologin_pam_service);
109 greeter->priv->autologin_pam_service = g_strdup (autologin_pam_service);
113 greeter_set_allow_guest (Greeter *greeter, gboolean allow_guest)
115 greeter->priv->allow_guest = allow_guest;
119 greeter_set_hint (Greeter *greeter, const gchar *name, const gchar *value)
121 g_hash_table_insert (greeter->priv->hints, g_strdup (name), g_strdup (value));
125 secure_malloc (Greeter *greeter, size_t n)
127 if (greeter->priv->use_secure_memory)
128 return gcry_malloc_secure (n);
134 secure_realloc (Greeter *greeter, void *ptr, size_t n)
136 if (greeter->priv->use_secure_memory)
137 return gcry_realloc (ptr, n);
139 return g_realloc (ptr, n);
143 secure_free (Greeter *greeter, void *ptr)
145 if (greeter->priv->use_secure_memory)
146 return gcry_free (ptr);
157 #define HEADER_SIZE (sizeof (guint32) * 2)
158 #define MAX_MESSAGE_LENGTH 1024
161 write_message (Greeter *greeter, guint8 *message, gsize message_length)
163 GError *error = NULL;
165 g_io_channel_write_chars (greeter->priv->to_greeter_channel, (gchar *) message, message_length, NULL, &error);
167 l_warning (greeter, "Error writing to greeter: %s", error->message);
168 g_clear_error (&error);
169 g_io_channel_flush (greeter->priv->to_greeter_channel, NULL);
173 write_int (guint8 *buffer, gint buffer_length, guint32 value, gsize *offset)
175 if (*offset + 4 >= buffer_length)
177 buffer[*offset] = value >> 24;
178 buffer[*offset+1] = (value >> 16) & 0xFF;
179 buffer[*offset+2] = (value >> 8) & 0xFF;
180 buffer[*offset+3] = value & 0xFF;
185 write_string (guint8 *buffer, gint buffer_length, const gchar *value, gsize *offset)
190 length = strlen (value);
193 write_int (buffer, buffer_length, length, offset);
194 if (*offset + length >= buffer_length)
198 memcpy (buffer + *offset, value, length);
204 write_header (guint8 *buffer, gint buffer_length, guint32 id, guint32 length, gsize *offset)
206 write_int (buffer, buffer_length, id, offset);
207 write_int (buffer, buffer_length, length, offset);
211 string_length (const gchar *value)
214 return int_length ();
216 return int_length () + strlen (value);
220 handle_connect (Greeter *greeter, const gchar *version)
222 guint8 message[MAX_MESSAGE_LENGTH];
228 l_debug (greeter, "Greeter connected version=%s", version);
230 length = string_length (VERSION);
231 g_hash_table_iter_init (&iter, greeter->priv->hints);
232 while (g_hash_table_iter_next (&iter, &key, &value))
233 length += string_length (key) + string_length (value);
235 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_CONNECTED, length, &offset);
236 write_string (message, MAX_MESSAGE_LENGTH, VERSION, &offset);
237 g_hash_table_iter_init (&iter, greeter->priv->hints);
238 while (g_hash_table_iter_next (&iter, &key, &value))
240 write_string (message, MAX_MESSAGE_LENGTH, key, &offset);
241 write_string (message, MAX_MESSAGE_LENGTH, value, &offset);
243 write_message (greeter, message, offset);
245 g_signal_emit (greeter, signals[CONNECTED], 0);
249 pam_messages_cb (Session *session, Greeter *greeter)
253 guint8 message[MAX_MESSAGE_LENGTH];
254 const struct pam_message *messages;
259 messages = session_get_messages (session);
260 messages_length = session_get_messages_length (session);
262 /* Respond to d-bus query with messages */
263 l_debug (greeter, "Prompt greeter with %d message(s)", messages_length);
264 size = int_length () + string_length (session_get_username (session)) + int_length ();
265 for (i = 0; i < messages_length; i++)
266 size += int_length () + string_length (messages[i].msg);
268 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_PROMPT_AUTHENTICATION, size, &offset);
269 write_int (message, MAX_MESSAGE_LENGTH, greeter->priv->authentication_sequence_number, &offset);
270 write_string (message, MAX_MESSAGE_LENGTH, session_get_username (session), &offset);
271 write_int (message, MAX_MESSAGE_LENGTH, messages_length, &offset);
272 for (i = 0; i < messages_length; i++)
274 write_int (message, MAX_MESSAGE_LENGTH, messages[i].msg_style, &offset);
275 write_string (message, MAX_MESSAGE_LENGTH, messages[i].msg, &offset);
277 if (messages[i].msg_style == PAM_PROMPT_ECHO_OFF || messages[i].msg_style == PAM_PROMPT_ECHO_ON)
280 write_message (greeter, message, offset);
282 /* Continue immediately if nothing to respond with */
283 // FIXME: Should probably give the greeter a chance to ack the message
286 struct pam_response *response;
287 response = calloc (messages_length, sizeof (struct pam_response));
288 session_respond (greeter->priv->authentication_session, response);
294 send_end_authentication (Greeter *greeter, guint32 sequence_number, const gchar *username, int result)
296 guint8 message[MAX_MESSAGE_LENGTH];
299 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_END_AUTHENTICATION, int_length () + string_length (username) + int_length (), &offset);
300 write_int (message, MAX_MESSAGE_LENGTH, sequence_number, &offset);
301 write_string (message, MAX_MESSAGE_LENGTH, username, &offset);
302 write_int (message, MAX_MESSAGE_LENGTH, result, &offset);
303 write_message (greeter, message, offset);
307 authentication_complete_cb (Session *session, Greeter *greeter)
311 l_debug (greeter, "Authenticate result for user %s: %s", session_get_username (session), session_get_authentication_result_string (session));
313 result = session_get_authentication_result (session);
314 if (session_get_is_authenticated (session))
316 if (session_get_user (session))
317 l_debug (greeter, "User %s authorized", session_get_username (session));
320 l_debug (greeter, "User %s authorized, but no account of that name exists", session_get_username (session));
321 result = PAM_USER_UNKNOWN;
325 send_end_authentication (greeter, greeter->priv->authentication_sequence_number, session_get_username (session), result);
329 reset_session (Greeter *greeter)
331 g_free (greeter->priv->remote_session);
332 greeter->priv->remote_session = NULL;
333 if (greeter->priv->authentication_session)
335 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
336 session_stop (greeter->priv->authentication_session);
337 g_object_unref (greeter->priv->authentication_session);
338 greeter->priv->authentication_session = NULL;
341 greeter->priv->guest_account_authenticated = FALSE;
345 handle_login (Greeter *greeter, guint32 sequence_number, const gchar *username)
347 const gchar *autologin_username, *service;
348 gboolean is_interactive;
350 if (username[0] == '\0')
352 l_debug (greeter, "Greeter start authentication");
356 l_debug (greeter, "Greeter start authentication for %s", username);
358 reset_session (greeter);
360 greeter->priv->authentication_sequence_number = sequence_number;
361 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
362 if (!greeter->priv->authentication_session)
364 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
368 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
369 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
371 /* Use non-interactive service for autologin user */
372 autologin_username = g_hash_table_lookup (greeter->priv->hints, "autologin-user");
373 if (autologin_username != NULL && g_strcmp0 (username, autologin_username) == 0)
375 service = greeter->priv->autologin_pam_service;
376 is_interactive = FALSE;
380 service = greeter->priv->pam_service;
381 is_interactive = TRUE;
384 /* Run the session process */
385 session_set_pam_service (greeter->priv->authentication_session, service);
386 session_set_username (greeter->priv->authentication_session, username);
387 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
388 session_set_is_interactive (greeter->priv->authentication_session, is_interactive);
389 session_start (greeter->priv->authentication_session);
393 handle_login_as_guest (Greeter *greeter, guint32 sequence_number)
395 l_debug (greeter, "Greeter start authentication for guest account");
397 reset_session (greeter);
399 if (!greeter->priv->allow_guest)
401 l_debug (greeter, "Guest account is disabled");
402 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
406 greeter->priv->guest_account_authenticated = TRUE;
407 send_end_authentication (greeter, sequence_number, "", PAM_SUCCESS);
411 get_remote_session_service (const gchar *session_name)
413 GKeyFile *session_desktop_file;
416 gchar *remote_sessions_dir, *filename, *path, *service = NULL;
417 GError *error = NULL;
419 /* Validate session name doesn't contain directory separators */
420 for (c = session_name; *c; c++)
426 /* Load the session file */
427 session_desktop_file = g_key_file_new ();
428 filename = g_strdup_printf ("%s.desktop", session_name);
429 remote_sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
430 path = g_build_filename (remote_sessions_dir, filename, NULL);
431 g_free (remote_sessions_dir);
433 result = g_key_file_load_from_file (session_desktop_file, path, G_KEY_FILE_NONE, &error);
435 g_debug ("Failed to load session file %s: %s", path, error->message);
437 g_clear_error (&error);
439 service = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, "X-LightDM-PAM-Service", NULL);
440 g_key_file_free (session_desktop_file);
446 handle_login_remote (Greeter *greeter, const gchar *session_name, const gchar *username, guint32 sequence_number)
450 if (username[0] == '\0')
452 l_debug (greeter, "Greeter start authentication for remote session %s", session_name);
456 l_debug (greeter, "Greeter start authentication for remote session %s as user %s", session_name, username);
458 reset_session (greeter);
460 service = get_remote_session_service (session_name);
463 send_end_authentication (greeter, sequence_number, "", PAM_SYSTEM_ERR);
467 greeter->priv->authentication_sequence_number = sequence_number;
468 greeter->priv->remote_session = g_strdup (session_name);
469 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
470 if (greeter->priv->authentication_session)
472 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
473 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
475 /* Run the session process */
476 session_set_pam_service (greeter->priv->authentication_session, service);
477 session_set_username (greeter->priv->authentication_session, username);
478 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
479 session_set_is_interactive (greeter->priv->authentication_session, TRUE);
480 session_set_is_guest (greeter->priv->authentication_session, TRUE);
481 session_start (greeter->priv->authentication_session);
486 if (!greeter->priv->authentication_session)
488 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
494 handle_continue_authentication (Greeter *greeter, gchar **secrets)
497 const struct pam_message *messages;
498 struct pam_response *response;
499 int i, j, n_prompts = 0;
501 /* Not in authentication */
502 if (greeter->priv->authentication_session == NULL)
505 messages_length = session_get_messages_length (greeter->priv->authentication_session);
506 messages = session_get_messages (greeter->priv->authentication_session);
508 /* Check correct number of responses */
509 for (i = 0; i < messages_length; i++)
511 int msg_style = messages[i].msg_style;
512 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
515 if (g_strv_length (secrets) != n_prompts)
517 session_respond_error (greeter->priv->authentication_session, PAM_CONV_ERR);
521 l_debug (greeter, "Continue authentication");
524 response = calloc (messages_length, sizeof (struct pam_response));
525 for (i = 0, j = 0; i < messages_length; i++)
527 int msg_style = messages[i].msg_style;
528 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
530 size_t secret_length = strlen (secrets[j]) + 1;
531 response[i].resp = secure_malloc (greeter, secret_length);
532 memcpy (response[i].resp, secrets[j], secret_length); // FIXME: Need to convert from UTF-8
537 session_respond (greeter->priv->authentication_session, response);
539 for (i = 0; i < messages_length; i++)
540 secure_free (greeter, response[i].resp);
545 handle_cancel_authentication (Greeter *greeter)
547 /* Not in authentication */
548 if (greeter->priv->authentication_session == NULL)
551 l_debug (greeter, "Cancel authentication");
552 reset_session (greeter);
556 handle_start_session (Greeter *greeter, const gchar *session)
559 guint8 message[MAX_MESSAGE_LENGTH];
561 SessionType session_type = SESSION_TYPE_LOCAL;
563 if (strcmp (session, "") == 0)
566 /* Use session type chosen in remote session */
567 if (greeter->priv->remote_session)
569 session_type = SESSION_TYPE_REMOTE;
570 session = greeter->priv->remote_session;
573 if (greeter->priv->guest_account_authenticated || session_get_is_authenticated (greeter->priv->authentication_session))
576 l_debug (greeter, "Greeter requests session %s", session);
578 l_debug (greeter, "Greeter requests default session");
579 greeter->priv->start_session = TRUE;
580 g_signal_emit (greeter, signals[START_SESSION], 0, session_type, session, &result);
584 l_debug (greeter, "Ignoring start session request, user is not authorized");
588 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_SESSION_RESULT, int_length (), &offset);
589 write_int (message, MAX_MESSAGE_LENGTH, result ? 0 : 1, &offset);
590 write_message (greeter, message, offset);
594 handle_set_language (Greeter *greeter, const gchar *language)
598 if (!greeter->priv->guest_account_authenticated && !session_get_is_authenticated (greeter->priv->authentication_session))
600 l_debug (greeter, "Ignoring set language request, user is not authorized");
604 // FIXME: Could use this
605 if (greeter->priv->guest_account_authenticated)
607 l_debug (greeter, "Ignoring set language request for guest user");
611 l_debug (greeter, "Greeter sets language %s", language);
612 user = session_get_user (greeter->priv->authentication_session);
613 user_set_language (user, language);
617 read_int (Greeter *greeter, gsize *offset)
621 if (greeter->priv->n_read - *offset < sizeof (guint32))
623 l_warning (greeter, "Not enough space for int, need %zu, got %zu", sizeof (guint32), greeter->priv->n_read - *offset);
626 buffer = greeter->priv->read_buffer + *offset;
627 value = buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
628 *offset += int_length ();
633 get_message_length (Greeter *greeter)
638 offset = int_length ();
639 payload_length = read_int (greeter, &offset);
641 if (HEADER_SIZE + payload_length < HEADER_SIZE)
643 l_warning (greeter, "Payload length of %u octets too long", payload_length);
647 return HEADER_SIZE + payload_length;
651 read_string_full (Greeter *greeter, gsize *offset, void* (*alloc_fn)(size_t n))
656 length = read_int (greeter, offset);
657 if (greeter->priv->n_read - *offset < length)
659 l_warning (greeter, "Not enough space for string, need %u, got %zu", length, greeter->priv->n_read - *offset);
660 return g_strdup ("");
663 value = (*alloc_fn) (sizeof (gchar *) * (length + 1));
664 memcpy (value, greeter->priv->read_buffer + *offset, length);
665 value[length] = '\0';
672 read_string (Greeter *greeter, gsize *offset)
674 return read_string_full (greeter, offset, g_malloc);
678 read_secret (Greeter *greeter, gsize *offset)
680 if (greeter->priv->use_secure_memory)
681 return read_string_full (greeter, offset, gcry_malloc_secure);
683 return read_string_full (greeter, offset, g_malloc);
687 read_cb (GIOChannel *source, GIOCondition condition, gpointer data)
689 Greeter *greeter = data;
690 gsize n_to_read, n_read, offset;
693 guint32 sequence_number, n_secrets, max_secrets;
694 gchar *version, *username, *session_name, *language;
696 GError *error = NULL;
698 if (condition == G_IO_HUP)
700 l_debug (greeter, "Greeter closed communication channel");
704 n_to_read = HEADER_SIZE;
705 if (greeter->priv->n_read >= HEADER_SIZE)
707 n_to_read = get_message_length (greeter);
708 if (n_to_read <= HEADER_SIZE)
712 status = g_io_channel_read_chars (greeter->priv->from_greeter_channel,
713 (gchar *) greeter->priv->read_buffer + greeter->priv->n_read,
714 n_to_read - greeter->priv->n_read,
718 l_warning (greeter, "Error reading from greeter: %s", error->message);
719 g_clear_error (&error);
720 if (status != G_IO_STATUS_NORMAL)
723 greeter->priv->n_read += n_read;
724 if (greeter->priv->n_read != n_to_read)
727 /* If have header, rerun for content */
728 if (greeter->priv->n_read == HEADER_SIZE)
730 n_to_read = get_message_length (greeter);
731 if (n_to_read > HEADER_SIZE)
733 greeter->priv->read_buffer = secure_realloc (greeter, greeter->priv->read_buffer, n_to_read);
734 read_cb (source, condition, greeter);
740 id = read_int (greeter, &offset);
741 read_int (greeter, &offset);
744 case GREETER_MESSAGE_CONNECT:
745 version = read_string (greeter, &offset);
746 handle_connect (greeter, version);
749 case GREETER_MESSAGE_AUTHENTICATE:
750 sequence_number = read_int (greeter, &offset);
751 username = read_string (greeter, &offset);
752 handle_login (greeter, sequence_number, username);
755 case GREETER_MESSAGE_AUTHENTICATE_AS_GUEST:
756 sequence_number = read_int (greeter, &offset);
757 handle_login_as_guest (greeter, sequence_number);
759 case GREETER_MESSAGE_AUTHENTICATE_REMOTE:
760 sequence_number = read_int (greeter, &offset);
761 session_name = read_string (greeter, &offset);
762 username = read_string (greeter, &offset);
763 handle_login_remote (greeter, session_name, username, sequence_number);
765 case GREETER_MESSAGE_CONTINUE_AUTHENTICATION:
766 n_secrets = read_int (greeter, &offset);
767 max_secrets = (G_MAXUINT32 - 1) / sizeof (gchar *);
768 if (n_secrets > max_secrets)
770 l_warning (greeter, "Array length of %u elements too long", n_secrets);
773 secrets = g_malloc (sizeof (gchar *) * (n_secrets + 1));
774 for (i = 0; i < n_secrets; i++)
775 secrets[i] = read_secret (greeter, &offset);
777 handle_continue_authentication (greeter, secrets);
778 for (i = 0; i < n_secrets; i++)
779 secure_free (greeter, secrets[i]);
782 case GREETER_MESSAGE_CANCEL_AUTHENTICATION:
783 handle_cancel_authentication (greeter);
785 case GREETER_MESSAGE_START_SESSION:
786 session_name = read_string (greeter, &offset);
787 handle_start_session (greeter, session_name);
788 g_free (session_name);
790 case GREETER_MESSAGE_SET_LANGUAGE:
791 language = read_string (greeter, &offset);
792 handle_set_language (greeter, language);
796 l_warning (greeter, "Unknown message from greeter: %d", id);
800 greeter->priv->n_read = 0;
806 greeter_get_guest_authenticated (Greeter *greeter)
808 g_return_val_if_fail (greeter != NULL, FALSE);
809 return greeter->priv->guest_account_authenticated;
813 greeter_get_authentication_session (Greeter *greeter)
815 g_return_val_if_fail (greeter != NULL, NULL);
816 return greeter->priv->authentication_session;
820 greeter_get_start_session (Greeter *greeter)
822 g_return_val_if_fail (greeter != NULL, FALSE);
823 return greeter->priv->start_session;
827 greeter_start (Session *session)
829 Greeter *greeter = GREETER (session);
830 int to_greeter_pipe[2], from_greeter_pipe[2];
831 gboolean result = FALSE;
834 /* Create a pipe to talk with the greeter */
835 if (pipe (to_greeter_pipe) != 0 || pipe (from_greeter_pipe) != 0)
837 g_warning ("Failed to create pipes: %s", strerror (errno));
840 greeter->priv->to_greeter_channel = g_io_channel_unix_new (to_greeter_pipe[1]);
841 g_io_channel_set_encoding (greeter->priv->to_greeter_channel, NULL, NULL);
842 greeter->priv->from_greeter_channel = g_io_channel_unix_new (from_greeter_pipe[0]);
843 g_io_channel_set_encoding (greeter->priv->from_greeter_channel, NULL, NULL);
844 g_io_channel_set_buffered (greeter->priv->from_greeter_channel, FALSE);
845 g_io_add_watch (greeter->priv->from_greeter_channel, G_IO_IN | G_IO_HUP, read_cb, greeter);
847 /* Let the greeter session know how to communicate with the daemon */
848 value = g_strdup_printf ("%d", from_greeter_pipe[1]);
849 session_set_env (SESSION (greeter), "LIGHTDM_TO_SERVER_FD", value);
851 value = g_strdup_printf ("%d", to_greeter_pipe[0]);
852 session_set_env (SESSION (greeter), "LIGHTDM_FROM_SERVER_FD", value);
855 /* Don't allow the daemon end of the pipes to be accessed in child processes */
856 fcntl (to_greeter_pipe[1], F_SETFD, FD_CLOEXEC);
857 fcntl (from_greeter_pipe[0], F_SETFD, FD_CLOEXEC);
859 result = SESSION_CLASS (greeter_parent_class)->start (session);
861 /* Close the session ends of the pipe */
862 close (to_greeter_pipe[0]);
863 close (from_greeter_pipe[1]);
869 greeter_real_create_session (Greeter *greeter)
875 greeter_real_start_session (Greeter *greeter, SessionType type, const gchar *session)
881 greeter_stop (Session *session)
883 Greeter *greeter = GREETER (session);
885 /* Stop any events occurring after we've stopped */
886 if (greeter->priv->authentication_session)
887 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
889 SESSION_CLASS (greeter_parent_class)->stop (session);
893 greeter_init (Greeter *greeter)
895 greeter->priv = G_TYPE_INSTANCE_GET_PRIVATE (greeter, GREETER_TYPE, GreeterPrivate);
896 greeter->priv->read_buffer = secure_malloc (greeter, HEADER_SIZE);
897 greeter->priv->hints = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
898 greeter->priv->use_secure_memory = config_get_boolean (config_get_instance (), "LightDM", "lock-memory");
902 greeter_finalize (GObject *object)
906 self = GREETER (object);
908 g_free (self->priv->pam_service);
909 g_free (self->priv->autologin_pam_service);
910 secure_free (self, self->priv->read_buffer);
911 g_hash_table_unref (self->priv->hints);
912 g_free (self->priv->remote_session);
913 if (self->priv->authentication_session)
915 g_signal_handlers_disconnect_matched (self->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
916 g_object_unref (self->priv->authentication_session);
918 if (self->priv->to_greeter_channel)
919 g_io_channel_unref (self->priv->to_greeter_channel);
920 if (self->priv->from_greeter_channel)
921 g_io_channel_unref (self->priv->from_greeter_channel);
923 G_OBJECT_CLASS (greeter_parent_class)->finalize (object);
927 greeter_class_init (GreeterClass *klass)
929 SessionClass *session_class = SESSION_CLASS (klass);
930 GObjectClass *object_class = G_OBJECT_CLASS (klass);
932 klass->create_session = greeter_real_create_session;
933 klass->start_session = greeter_real_start_session;
934 session_class->start = greeter_start;
935 session_class->stop = greeter_stop;
936 object_class->finalize = greeter_finalize;
939 g_signal_new ("connected",
940 G_TYPE_FROM_CLASS (klass),
942 G_STRUCT_OFFSET (GreeterClass, connected),
947 signals[CREATE_SESSION] =
948 g_signal_new ("create-session",
949 G_TYPE_FROM_CLASS (klass),
951 G_STRUCT_OFFSET (GreeterClass, create_session),
952 g_signal_accumulator_first_wins,
957 signals[START_SESSION] =
958 g_signal_new ("start-session",
959 G_TYPE_FROM_CLASS (klass),
961 G_STRUCT_OFFSET (GreeterClass, start_session),
962 g_signal_accumulator_true_handled,
965 G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_STRING);
967 g_type_class_add_private (klass, sizeof (GreeterPrivate));