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"
34 static guint signals[LAST_SIGNAL] = { 0 };
38 /* PAM service to authenticate with */
40 gchar *autologin_pam_service;
42 /* Buffer for data read from greeter */
45 gboolean use_secure_memory;
47 /* Hints for the greeter */
50 /* Default session to use */
51 gchar *default_session;
53 /* Sequence number of current PAM session */
54 guint32 authentication_sequence_number;
56 /* Remote session name */
57 gchar *remote_session;
59 /* Currently selected user */
60 gchar *active_username;
62 /* PAM session being constructed by the greeter */
63 Session *authentication_session;
65 /* TRUE if a user has been authenticated and the session requested to start */
66 gboolean start_session;
68 /* TRUE if can log into guest accounts */
71 /* TRUE if logging into guest session */
72 gboolean guest_account_authenticated;
74 /* Communication channels to communicate with */
75 GIOChannel *to_greeter_channel;
76 GIOChannel *from_greeter_channel;
79 G_DEFINE_TYPE (Greeter, greeter, SESSION_TYPE);
81 /* Messages from the greeter to the server */
84 GREETER_MESSAGE_CONNECT = 0,
85 GREETER_MESSAGE_AUTHENTICATE,
86 GREETER_MESSAGE_AUTHENTICATE_AS_GUEST,
87 GREETER_MESSAGE_CONTINUE_AUTHENTICATION,
88 GREETER_MESSAGE_START_SESSION,
89 GREETER_MESSAGE_CANCEL_AUTHENTICATION,
90 GREETER_MESSAGE_SET_LANGUAGE,
91 GREETER_MESSAGE_AUTHENTICATE_REMOTE
94 /* Messages from the server to the greeter */
97 SERVER_MESSAGE_CONNECTED = 0,
98 SERVER_MESSAGE_PROMPT_AUTHENTICATION,
99 SERVER_MESSAGE_END_AUTHENTICATION,
100 SERVER_MESSAGE_SESSION_RESULT
103 static gboolean read_cb (GIOChannel *source, GIOCondition condition, gpointer data);
108 return g_object_new (GREETER_TYPE, NULL);
112 greeter_set_pam_services (Greeter *greeter, const gchar *pam_service, const gchar *autologin_pam_service)
114 g_free (greeter->priv->pam_service);
115 greeter->priv->pam_service = g_strdup (pam_service);
116 g_free (greeter->priv->autologin_pam_service);
117 greeter->priv->autologin_pam_service = g_strdup (autologin_pam_service);
121 greeter_set_allow_guest (Greeter *greeter, gboolean allow_guest)
123 greeter->priv->allow_guest = allow_guest;
127 greeter_set_hint (Greeter *greeter, const gchar *name, const gchar *value)
129 g_hash_table_insert (greeter->priv->hints, g_strdup (name), g_strdup (value));
133 secure_malloc (Greeter *greeter, size_t n)
135 if (greeter->priv->use_secure_memory)
136 return gcry_malloc_secure (n);
142 secure_realloc (Greeter *greeter, void *ptr, size_t n)
144 if (greeter->priv->use_secure_memory)
145 return gcry_realloc (ptr, n);
147 return g_realloc (ptr, n);
151 secure_free (Greeter *greeter, void *ptr)
153 if (greeter->priv->use_secure_memory)
154 return gcry_free (ptr);
165 #define HEADER_SIZE (sizeof (guint32) * 2)
166 #define MAX_MESSAGE_LENGTH 1024
169 write_message (Greeter *greeter, guint8 *message, gsize message_length)
171 GError *error = NULL;
173 g_io_channel_write_chars (greeter->priv->to_greeter_channel, (gchar *) message, message_length, NULL, &error);
175 l_warning (greeter, "Error writing to greeter: %s", error->message);
176 g_clear_error (&error);
177 g_io_channel_flush (greeter->priv->to_greeter_channel, NULL);
181 write_int (guint8 *buffer, gint buffer_length, guint32 value, gsize *offset)
183 if (*offset + 4 >= buffer_length)
185 buffer[*offset] = value >> 24;
186 buffer[*offset+1] = (value >> 16) & 0xFF;
187 buffer[*offset+2] = (value >> 8) & 0xFF;
188 buffer[*offset+3] = value & 0xFF;
193 write_string (guint8 *buffer, gint buffer_length, const gchar *value, gsize *offset)
198 length = strlen (value);
201 write_int (buffer, buffer_length, length, offset);
202 if (*offset + length >= buffer_length)
206 memcpy (buffer + *offset, value, length);
212 write_header (guint8 *buffer, gint buffer_length, guint32 id, guint32 length, gsize *offset)
214 write_int (buffer, buffer_length, id, offset);
215 write_int (buffer, buffer_length, length, offset);
219 string_length (const gchar *value)
222 return int_length ();
224 return int_length () + strlen (value);
228 handle_connect (Greeter *greeter, const gchar *version)
230 guint8 message[MAX_MESSAGE_LENGTH];
236 l_debug (greeter, "Greeter connected version=%s", version);
238 length = string_length (VERSION);
239 g_hash_table_iter_init (&iter, greeter->priv->hints);
240 while (g_hash_table_iter_next (&iter, &key, &value))
241 length += string_length (key) + string_length (value);
243 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_CONNECTED, length, &offset);
244 write_string (message, MAX_MESSAGE_LENGTH, VERSION, &offset);
245 g_hash_table_iter_init (&iter, greeter->priv->hints);
246 while (g_hash_table_iter_next (&iter, &key, &value))
248 write_string (message, MAX_MESSAGE_LENGTH, key, &offset);
249 write_string (message, MAX_MESSAGE_LENGTH, value, &offset);
251 write_message (greeter, message, offset);
253 g_signal_emit (greeter, signals[CONNECTED], 0);
257 pam_messages_cb (Session *session, Greeter *greeter)
261 guint8 message[MAX_MESSAGE_LENGTH];
262 const struct pam_message *messages;
267 messages = session_get_messages (session);
268 messages_length = session_get_messages_length (session);
270 /* Respond to d-bus query with messages */
271 l_debug (greeter, "Prompt greeter with %d message(s)", messages_length);
272 size = int_length () + string_length (session_get_username (session)) + int_length ();
273 for (i = 0; i < messages_length; i++)
274 size += int_length () + string_length (messages[i].msg);
276 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_PROMPT_AUTHENTICATION, size, &offset);
277 write_int (message, MAX_MESSAGE_LENGTH, greeter->priv->authentication_sequence_number, &offset);
278 write_string (message, MAX_MESSAGE_LENGTH, session_get_username (session), &offset);
279 write_int (message, MAX_MESSAGE_LENGTH, messages_length, &offset);
280 for (i = 0; i < messages_length; i++)
282 write_int (message, MAX_MESSAGE_LENGTH, messages[i].msg_style, &offset);
283 write_string (message, MAX_MESSAGE_LENGTH, messages[i].msg, &offset);
285 if (messages[i].msg_style == PAM_PROMPT_ECHO_OFF || messages[i].msg_style == PAM_PROMPT_ECHO_ON)
288 write_message (greeter, message, offset);
290 /* Continue immediately if nothing to respond with */
291 // FIXME: Should probably give the greeter a chance to ack the message
294 struct pam_response *response;
295 response = calloc (messages_length, sizeof (struct pam_response));
296 session_respond (greeter->priv->authentication_session, response);
302 send_end_authentication (Greeter *greeter, guint32 sequence_number, const gchar *username, int result)
304 guint8 message[MAX_MESSAGE_LENGTH];
307 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_END_AUTHENTICATION, int_length () + string_length (username) + int_length (), &offset);
308 write_int (message, MAX_MESSAGE_LENGTH, sequence_number, &offset);
309 write_string (message, MAX_MESSAGE_LENGTH, username, &offset);
310 write_int (message, MAX_MESSAGE_LENGTH, result, &offset);
311 write_message (greeter, message, offset);
315 authentication_complete_cb (Session *session, Greeter *greeter)
319 l_debug (greeter, "Authenticate result for user %s: %s", session_get_username (session), session_get_authentication_result_string (session));
321 result = session_get_authentication_result (session);
322 if (session_get_is_authenticated (session))
324 if (session_get_user (session))
325 l_debug (greeter, "User %s authorized", session_get_username (session));
328 l_debug (greeter, "User %s authorized, but no account of that name exists", session_get_username (session));
329 result = PAM_USER_UNKNOWN;
333 send_end_authentication (greeter, greeter->priv->authentication_sequence_number, session_get_username (session), result);
337 reset_session (Greeter *greeter)
339 g_free (greeter->priv->remote_session);
340 greeter->priv->remote_session = NULL;
341 if (greeter->priv->authentication_session)
343 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
344 session_stop (greeter->priv->authentication_session);
345 g_object_unref (greeter->priv->authentication_session);
346 greeter->priv->authentication_session = NULL;
349 greeter->priv->guest_account_authenticated = FALSE;
353 handle_login (Greeter *greeter, guint32 sequence_number, const gchar *username)
355 const gchar *autologin_username, *service;
356 gboolean is_interactive;
358 if (username[0] == '\0')
360 l_debug (greeter, "Greeter start authentication");
364 l_debug (greeter, "Greeter start authentication for %s", username);
366 reset_session (greeter);
368 if (greeter->priv->active_username)
369 g_free (greeter->priv->active_username);
370 greeter->priv->active_username = g_strdup (username);
371 g_object_notify (G_OBJECT (greeter), "active-username");
373 greeter->priv->authentication_sequence_number = sequence_number;
374 g_signal_emit (greeter, signals[CREATE_SESSION], 0, username, &greeter->priv->authentication_session);
375 if (!greeter->priv->authentication_session)
377 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
381 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
382 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
384 /* Use non-interactive service for autologin user */
385 autologin_username = g_hash_table_lookup (greeter->priv->hints, "autologin-user");
386 if (autologin_username != NULL && g_strcmp0 (username, autologin_username) == 0)
388 service = greeter->priv->autologin_pam_service;
389 is_interactive = FALSE;
393 service = greeter->priv->pam_service;
394 is_interactive = TRUE;
397 /* Run the session process */
398 session_set_pam_service (greeter->priv->authentication_session, service);
399 session_set_username (greeter->priv->authentication_session, username);
400 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
401 session_set_is_interactive (greeter->priv->authentication_session, is_interactive);
402 session_start (greeter->priv->authentication_session);
406 handle_login_as_guest (Greeter *greeter, guint32 sequence_number)
408 l_debug (greeter, "Greeter start authentication for guest account");
410 reset_session (greeter);
412 if (!greeter->priv->allow_guest)
414 l_debug (greeter, "Guest account is disabled");
415 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
419 greeter->priv->guest_account_authenticated = TRUE;
420 send_end_authentication (greeter, sequence_number, "", PAM_SUCCESS);
424 get_remote_session_service (const gchar *session_name)
426 GKeyFile *session_desktop_file;
429 gchar *remote_sessions_dir, *filename, *path, *service = NULL;
430 GError *error = NULL;
432 /* Validate session name doesn't contain directory separators */
433 for (c = session_name; *c; c++)
439 /* Load the session file */
440 session_desktop_file = g_key_file_new ();
441 filename = g_strdup_printf ("%s.desktop", session_name);
442 remote_sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
443 path = g_build_filename (remote_sessions_dir, filename, NULL);
444 g_free (remote_sessions_dir);
446 result = g_key_file_load_from_file (session_desktop_file, path, G_KEY_FILE_NONE, &error);
448 g_debug ("Failed to load session file %s: %s", path, error->message);
450 g_clear_error (&error);
452 service = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, "X-LightDM-PAM-Service", NULL);
453 g_key_file_free (session_desktop_file);
459 handle_login_remote (Greeter *greeter, const gchar *session_name, const gchar *username, guint32 sequence_number)
463 if (username[0] == '\0')
465 l_debug (greeter, "Greeter start authentication for remote session %s", session_name);
469 l_debug (greeter, "Greeter start authentication for remote session %s as user %s", session_name, username);
471 reset_session (greeter);
473 service = get_remote_session_service (session_name);
476 send_end_authentication (greeter, sequence_number, "", PAM_SYSTEM_ERR);
480 greeter->priv->authentication_sequence_number = sequence_number;
481 greeter->priv->remote_session = g_strdup (session_name);
482 g_signal_emit (greeter, signals[CREATE_SESSION], 0, username, &greeter->priv->authentication_session);
483 if (greeter->priv->authentication_session)
485 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
486 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
488 /* Run the session process */
489 session_set_pam_service (greeter->priv->authentication_session, service);
490 session_set_username (greeter->priv->authentication_session, username);
491 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
492 session_set_is_interactive (greeter->priv->authentication_session, TRUE);
493 session_set_is_guest (greeter->priv->authentication_session, TRUE);
494 session_start (greeter->priv->authentication_session);
499 if (!greeter->priv->authentication_session)
501 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
507 handle_continue_authentication (Greeter *greeter, gchar **secrets)
510 const struct pam_message *messages;
511 struct pam_response *response;
512 int i, j, n_prompts = 0;
514 /* Not in authentication */
515 if (greeter->priv->authentication_session == NULL)
518 messages_length = session_get_messages_length (greeter->priv->authentication_session);
519 messages = session_get_messages (greeter->priv->authentication_session);
521 /* Check correct number of responses */
522 for (i = 0; i < messages_length; i++)
524 int msg_style = messages[i].msg_style;
525 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
528 if (g_strv_length (secrets) != n_prompts)
530 session_respond_error (greeter->priv->authentication_session, PAM_CONV_ERR);
534 l_debug (greeter, "Continue authentication");
537 response = calloc (messages_length, sizeof (struct pam_response));
538 for (i = 0, j = 0; i < messages_length; i++)
540 int msg_style = messages[i].msg_style;
541 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
543 size_t secret_length = strlen (secrets[j]) + 1;
544 response[i].resp = secure_malloc (greeter, secret_length);
545 memcpy (response[i].resp, secrets[j], secret_length); // FIXME: Need to convert from UTF-8
550 session_respond (greeter->priv->authentication_session, response);
552 for (i = 0; i < messages_length; i++)
553 secure_free (greeter, response[i].resp);
558 handle_cancel_authentication (Greeter *greeter)
560 /* Not in authentication */
561 if (greeter->priv->authentication_session == NULL)
564 l_debug (greeter, "Cancel authentication");
565 reset_session (greeter);
569 handle_start_session (Greeter *greeter, const gchar *session)
572 guint8 message[MAX_MESSAGE_LENGTH];
574 SessionType session_type = SESSION_TYPE_LOCAL;
576 if (strcmp (session, "") == 0)
579 /* Use session type chosen in remote session */
580 if (greeter->priv->remote_session)
582 session_type = SESSION_TYPE_REMOTE;
583 session = greeter->priv->remote_session;
586 if (greeter->priv->guest_account_authenticated || session_get_is_authenticated (greeter->priv->authentication_session))
589 l_debug (greeter, "Greeter requests session %s", session);
591 l_debug (greeter, "Greeter requests default session");
592 greeter->priv->start_session = TRUE;
593 g_signal_emit (greeter, signals[START_SESSION], 0, session_type, session, &result);
597 l_debug (greeter, "Ignoring start session request, user is not authorized");
601 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_SESSION_RESULT, int_length (), &offset);
602 write_int (message, MAX_MESSAGE_LENGTH, result ? 0 : 1, &offset);
603 write_message (greeter, message, offset);
607 handle_set_language (Greeter *greeter, const gchar *language)
611 if (!greeter->priv->guest_account_authenticated && !session_get_is_authenticated (greeter->priv->authentication_session))
613 l_debug (greeter, "Ignoring set language request, user is not authorized");
617 // FIXME: Could use this
618 if (greeter->priv->guest_account_authenticated)
620 l_debug (greeter, "Ignoring set language request for guest user");
624 l_debug (greeter, "Greeter sets language %s", language);
625 user = session_get_user (greeter->priv->authentication_session);
626 user_set_language (user, language);
630 read_int (Greeter *greeter, gsize *offset)
634 if (greeter->priv->n_read - *offset < sizeof (guint32))
636 l_warning (greeter, "Not enough space for int, need %zu, got %zu", sizeof (guint32), greeter->priv->n_read - *offset);
639 buffer = greeter->priv->read_buffer + *offset;
640 value = buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
641 *offset += int_length ();
646 get_message_length (Greeter *greeter)
651 offset = int_length ();
652 payload_length = read_int (greeter, &offset);
654 if (HEADER_SIZE + payload_length < HEADER_SIZE)
656 l_warning (greeter, "Payload length of %u octets too long", payload_length);
660 return HEADER_SIZE + payload_length;
664 read_string_full (Greeter *greeter, gsize *offset, void* (*alloc_fn)(size_t n))
669 length = read_int (greeter, offset);
670 if (greeter->priv->n_read - *offset < length)
672 l_warning (greeter, "Not enough space for string, need %u, got %zu", length, greeter->priv->n_read - *offset);
673 return g_strdup ("");
676 value = (*alloc_fn) (sizeof (gchar *) * (length + 1));
677 memcpy (value, greeter->priv->read_buffer + *offset, length);
678 value[length] = '\0';
685 read_string (Greeter *greeter, gsize *offset)
687 return read_string_full (greeter, offset, g_malloc);
691 read_secret (Greeter *greeter, gsize *offset)
693 if (greeter->priv->use_secure_memory)
694 return read_string_full (greeter, offset, gcry_malloc_secure);
696 return read_string_full (greeter, offset, g_malloc);
700 read_cb (GIOChannel *source, GIOCondition condition, gpointer data)
702 Greeter *greeter = data;
703 gsize n_to_read, n_read, offset;
706 guint32 sequence_number, n_secrets, max_secrets;
707 gchar *version, *username, *session_name, *language;
709 GError *error = NULL;
711 if (condition == G_IO_HUP)
713 l_debug (greeter, "Greeter closed communication channel");
717 n_to_read = HEADER_SIZE;
718 if (greeter->priv->n_read >= HEADER_SIZE)
720 n_to_read = get_message_length (greeter);
721 if (n_to_read <= HEADER_SIZE)
725 status = g_io_channel_read_chars (greeter->priv->from_greeter_channel,
726 (gchar *) greeter->priv->read_buffer + greeter->priv->n_read,
727 n_to_read - greeter->priv->n_read,
731 l_warning (greeter, "Error reading from greeter: %s", error->message);
732 g_clear_error (&error);
733 if (status != G_IO_STATUS_NORMAL)
736 greeter->priv->n_read += n_read;
737 if (greeter->priv->n_read != n_to_read)
740 /* If have header, rerun for content */
741 if (greeter->priv->n_read == HEADER_SIZE)
743 n_to_read = get_message_length (greeter);
744 if (n_to_read > HEADER_SIZE)
746 greeter->priv->read_buffer = secure_realloc (greeter, greeter->priv->read_buffer, n_to_read);
747 read_cb (source, condition, greeter);
753 id = read_int (greeter, &offset);
754 read_int (greeter, &offset);
757 case GREETER_MESSAGE_CONNECT:
758 version = read_string (greeter, &offset);
759 handle_connect (greeter, version);
762 case GREETER_MESSAGE_AUTHENTICATE:
763 sequence_number = read_int (greeter, &offset);
764 username = read_string (greeter, &offset);
765 handle_login (greeter, sequence_number, username);
768 case GREETER_MESSAGE_AUTHENTICATE_AS_GUEST:
769 sequence_number = read_int (greeter, &offset);
770 handle_login_as_guest (greeter, sequence_number);
772 case GREETER_MESSAGE_AUTHENTICATE_REMOTE:
773 sequence_number = read_int (greeter, &offset);
774 session_name = read_string (greeter, &offset);
775 username = read_string (greeter, &offset);
776 handle_login_remote (greeter, session_name, username, sequence_number);
778 case GREETER_MESSAGE_CONTINUE_AUTHENTICATION:
779 n_secrets = read_int (greeter, &offset);
780 max_secrets = (G_MAXUINT32 - 1) / sizeof (gchar *);
781 if (n_secrets > max_secrets)
783 l_warning (greeter, "Array length of %u elements too long", n_secrets);
786 secrets = g_malloc (sizeof (gchar *) * (n_secrets + 1));
787 for (i = 0; i < n_secrets; i++)
788 secrets[i] = read_secret (greeter, &offset);
790 handle_continue_authentication (greeter, secrets);
791 for (i = 0; i < n_secrets; i++)
792 secure_free (greeter, secrets[i]);
795 case GREETER_MESSAGE_CANCEL_AUTHENTICATION:
796 handle_cancel_authentication (greeter);
798 case GREETER_MESSAGE_START_SESSION:
799 session_name = read_string (greeter, &offset);
800 handle_start_session (greeter, session_name);
801 g_free (session_name);
803 case GREETER_MESSAGE_SET_LANGUAGE:
804 language = read_string (greeter, &offset);
805 handle_set_language (greeter, language);
809 l_warning (greeter, "Unknown message from greeter: %d", id);
813 greeter->priv->n_read = 0;
819 greeter_get_guest_authenticated (Greeter *greeter)
821 g_return_val_if_fail (greeter != NULL, FALSE);
822 return greeter->priv->guest_account_authenticated;
826 greeter_get_authentication_session (Greeter *greeter)
828 g_return_val_if_fail (greeter != NULL, NULL);
829 return greeter->priv->authentication_session;
833 greeter_get_start_session (Greeter *greeter)
835 g_return_val_if_fail (greeter != NULL, FALSE);
836 return greeter->priv->start_session;
840 greeter_get_active_username (Greeter *greeter)
842 g_return_val_if_fail (greeter != NULL, NULL);
843 return greeter->priv->active_username;
847 greeter_start (Session *session)
849 Greeter *greeter = GREETER (session);
850 int to_greeter_pipe[2], from_greeter_pipe[2];
851 gboolean result = FALSE;
854 /* Create a pipe to talk with the greeter */
855 if (pipe (to_greeter_pipe) != 0 || pipe (from_greeter_pipe) != 0)
857 g_warning ("Failed to create pipes: %s", strerror (errno));
860 greeter->priv->to_greeter_channel = g_io_channel_unix_new (to_greeter_pipe[1]);
861 g_io_channel_set_encoding (greeter->priv->to_greeter_channel, NULL, NULL);
862 greeter->priv->from_greeter_channel = g_io_channel_unix_new (from_greeter_pipe[0]);
863 g_io_channel_set_encoding (greeter->priv->from_greeter_channel, NULL, NULL);
864 g_io_channel_set_buffered (greeter->priv->from_greeter_channel, FALSE);
865 g_io_add_watch (greeter->priv->from_greeter_channel, G_IO_IN | G_IO_HUP, read_cb, greeter);
867 /* Let the greeter session know how to communicate with the daemon */
868 value = g_strdup_printf ("%d", from_greeter_pipe[1]);
869 session_set_env (SESSION (greeter), "LIGHTDM_TO_SERVER_FD", value);
871 value = g_strdup_printf ("%d", to_greeter_pipe[0]);
872 session_set_env (SESSION (greeter), "LIGHTDM_FROM_SERVER_FD", value);
875 /* Don't allow the daemon end of the pipes to be accessed in child processes */
876 fcntl (to_greeter_pipe[1], F_SETFD, FD_CLOEXEC);
877 fcntl (from_greeter_pipe[0], F_SETFD, FD_CLOEXEC);
879 result = SESSION_CLASS (greeter_parent_class)->start (session);
881 /* Close the session ends of the pipe */
882 close (to_greeter_pipe[0]);
883 close (from_greeter_pipe[1]);
889 greeter_real_create_session (Greeter *greeter)
895 greeter_real_start_session (Greeter *greeter, SessionType type, const gchar *session)
901 greeter_stop (Session *session)
903 Greeter *greeter = GREETER (session);
905 /* Stop any events occurring after we've stopped */
906 if (greeter->priv->authentication_session)
907 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
909 SESSION_CLASS (greeter_parent_class)->stop (session);
913 greeter_init (Greeter *greeter)
915 greeter->priv = G_TYPE_INSTANCE_GET_PRIVATE (greeter, GREETER_TYPE, GreeterPrivate);
916 greeter->priv->read_buffer = secure_malloc (greeter, HEADER_SIZE);
917 greeter->priv->hints = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
918 greeter->priv->use_secure_memory = config_get_boolean (config_get_instance (), "LightDM", "lock-memory");
922 greeter_finalize (GObject *object)
926 self = GREETER (object);
928 g_free (self->priv->pam_service);
929 g_free (self->priv->autologin_pam_service);
930 secure_free (self, self->priv->read_buffer);
931 g_hash_table_unref (self->priv->hints);
932 g_free (self->priv->remote_session);
933 g_free (self->priv->active_username);
934 if (self->priv->authentication_session)
936 g_signal_handlers_disconnect_matched (self->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
937 g_object_unref (self->priv->authentication_session);
939 if (self->priv->to_greeter_channel)
940 g_io_channel_unref (self->priv->to_greeter_channel);
941 if (self->priv->from_greeter_channel)
942 g_io_channel_unref (self->priv->from_greeter_channel);
944 G_OBJECT_CLASS (greeter_parent_class)->finalize (object);
948 greeter_set_property (GObject *object,
953 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
957 greeter_get_property (GObject *object,
962 Greeter *greeter = GREETER (object);
965 case PROP_ACTIVE_USERNAME:
966 g_value_set_string (value, greeter_get_active_username (greeter));
969 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
975 greeter_class_init (GreeterClass *klass)
977 SessionClass *session_class = SESSION_CLASS (klass);
978 GObjectClass *object_class = G_OBJECT_CLASS (klass);
980 klass->create_session = greeter_real_create_session;
981 klass->start_session = greeter_real_start_session;
982 session_class->start = greeter_start;
983 session_class->stop = greeter_stop;
984 object_class->finalize = greeter_finalize;
985 object_class->get_property = greeter_get_property;
986 object_class->set_property = greeter_set_property;
989 g_signal_new ("connected",
990 G_TYPE_FROM_CLASS (klass),
992 G_STRUCT_OFFSET (GreeterClass, connected),
997 signals[CREATE_SESSION] =
998 g_signal_new ("create-session",
999 G_TYPE_FROM_CLASS (klass),
1001 G_STRUCT_OFFSET (GreeterClass, create_session),
1002 g_signal_accumulator_first_wins,
1005 SESSION_TYPE, 1, G_TYPE_STRING);
1007 signals[START_SESSION] =
1008 g_signal_new ("start-session",
1009 G_TYPE_FROM_CLASS (klass),
1011 G_STRUCT_OFFSET (GreeterClass, start_session),
1012 g_signal_accumulator_true_handled,
1015 G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_STRING);
1017 g_object_class_install_property (object_class,
1018 PROP_ACTIVE_USERNAME,
1019 g_param_spec_string ("active-username",
1025 g_type_class_add_private (klass, sizeof (GreeterPrivate));