1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright (C) 2004-2006 William Jon McCann <mccann@jhu.edu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* Authors: William Jon McCann <mccann@jhu.edu>
*
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <glib/gi18n.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>
#include <gtk/gtkx.h>
#include "gs-lock-plug.h"
#include "gs-auth.h"
#include "setuid.h"
#include "gs-debug.h"
#define MAX_FAILURES 5
static gboolean verbose = FALSE;
static gboolean show_version = FALSE;
static gboolean enable_logout = FALSE;
static gboolean enable_switch = FALSE;
#ifdef HAVE_RDA
static gboolean enable_suspend = FALSE;
#endif /* HAVE_RDA */
static char* logout_command = NULL;
static char* status_message = NULL;
static char* away_message = NULL;
static GOptionEntry entries[] = {
{"verbose", 0, 0, G_OPTION_ARG_NONE, &verbose, N_("Show debugging output"), NULL},
{"version", 0, 0, G_OPTION_ARG_NONE, &show_version, N_("Version of this application"), NULL},
{"enable-logout", 0, 0, G_OPTION_ARG_NONE, &enable_logout, N_("Show the logout button"), NULL},
#ifdef HAVE_RDA
{"enable-suspend", 0, 0, G_OPTION_ARG_NONE, &enable_suspend, N_("Show the suspend button if session is remote\n\t\t\t\t and suspension is supported"), NULL},
#endif /* HAVE_RDA */
{"logout-command", 0, 0, G_OPTION_ARG_STRING, &logout_command, N_("Command to invoke from the logout button"), NULL},
{"enable-switch", 0, 0, G_OPTION_ARG_NONE, &enable_switch, N_("Show the switch user button"), NULL},
{"status-message", 0, 0, G_OPTION_ARG_STRING, &status_message, N_("Message to show in the dialog"), N_("MESSAGE")},
{"away-message", 0, 0, G_OPTION_ARG_STRING, &away_message, N_("Not used"), N_("MESSAGE")},
{NULL}
};
static char* get_id_string(GtkWidget* widget)
{
char* id = NULL;
g_return_val_if_fail(widget != NULL, NULL);
g_return_val_if_fail(GTK_IS_WIDGET(widget), NULL);
id = g_strdup_printf("%" G_GUINT32_FORMAT, (guint32) GDK_WINDOW_XID(gtk_widget_get_window(widget)));
return id;
}
static gboolean print_id(GtkWidget* widget)
{
char* id;
gs_profile_start(NULL);
id = get_id_string(widget);
printf("WINDOW ID=%s\n", id);
fflush(stdout);
gs_profile_end(NULL);
g_free(id);
return FALSE;
}
static void response_cancel(void)
{
printf("RESPONSE=CANCEL\n");
fflush(stdout);
}
static void response_ok(void)
{
printf("RESPONSE=OK\n");
fflush(stdout);
}
static gboolean quit_response_ok(void)
{
response_ok();
gtk_main_quit();
return FALSE;
}
static gboolean quit_response_cancel(void)
{
response_cancel();
gtk_main_quit();
return FALSE;
}
static void response_lock_init_failed(void)
{
/* if we fail to lock then we should drop the dialog */
response_ok();
}
static char* request_response(GSLockPlug* plug, const char* prompt, gboolean visible)
{
int response;
char* text;
gs_lock_plug_set_sensitive(plug, TRUE);
gs_lock_plug_enable_prompt(plug, prompt, visible);
response = gs_lock_plug_run(plug);
gs_debug ("got response: %d", response);
text = NULL;
if (response == GS_LOCK_PLUG_RESPONSE_OK)
{
gs_lock_plug_get_text(plug, &text);
}
gs_lock_plug_disable_prompt(plug);
return text;
}
/* Adapted from MDM2 daemon/verify-pam.c on 2006-06-13 */
static const char* maybe_translate_message(const char* msg)
{
char* s;
const char* ret;
static GHashTable* hash = NULL;
if (hash == NULL)
{
/* Here we come with some fairly standard messages so that
we have as much as possible translated. Should really be
translated in pam I suppose. This way we can "change"
some of these messages to be more sane. */
hash = g_hash_table_new (g_str_hash, g_str_equal);
/* login: is whacked always translate to Username: */
g_hash_table_insert(hash, "login:", _("Username:"));
g_hash_table_insert(hash, "Username:", _("Username:"));
g_hash_table_insert(hash, "username:", _("Username:"));
g_hash_table_insert(hash, "Password:", _("Password:"));
g_hash_table_insert(hash, "password:", _("Password:"));
g_hash_table_insert(hash, "You are required to change your password immediately (password aged)", _("You are required to change your password immediately (password aged)"));
g_hash_table_insert(hash, "You are required to change your password immediately (root enforced)", _("You are required to change your password immediately (root enforced)"));
g_hash_table_insert(hash, "Your account has expired; please contact your system administrator", _("Your account has expired; please contact your system administrator"));
g_hash_table_insert(hash, "No password supplied", _("No password supplied"));
g_hash_table_insert(hash, "Password unchanged", _("Password unchanged"));
g_hash_table_insert(hash, "Can not get username", _("Can not get username"));
g_hash_table_insert(hash, "Retype new UNIX password:", _("Retype new UNIX password:"));
g_hash_table_insert(hash, "Enter new UNIX password:", _("Enter new UNIX password:"));
g_hash_table_insert(hash, "(current) UNIX password:", _("(current) UNIX password:"));
g_hash_table_insert(hash, "Error while changing NIS password.", _("Error while changing NIS password."));
g_hash_table_insert(hash, "You must choose a longer password", _("You must choose a longer password"));
g_hash_table_insert(hash, "Password has been already used. Choose another.", _("Password has been already used. Choose another."));
g_hash_table_insert(hash, "You must wait longer to change your password", _("You must wait longer to change your password"));
g_hash_table_insert(hash, "Sorry, passwords do not match", _("Sorry, passwords do not match"));
/* FIXME: what about messages which have some variables in them, perhaps try to do those as well */
}
s = g_strstrip(g_strdup(msg));
ret = g_hash_table_lookup(hash, s);
g_free(s);
if (ret != NULL)
{
return ret;
}
else
{
return msg;
}
}
static gboolean auth_message_handler(GSAuthMessageStyle style, const char* msg, char** response, gpointer data)
{
gboolean ret;
GSLockPlug* plug;
const char* message;
plug = GS_LOCK_PLUG(data);
gs_profile_start(NULL);
gs_debug("Got message style %d: '%s'", style, msg);
gtk_widget_show(GTK_WIDGET(plug));
gs_lock_plug_set_ready(plug);
ret = TRUE;
*response = NULL;
message = maybe_translate_message(msg);
switch (style)
{
case GS_AUTH_MESSAGE_PROMPT_ECHO_ON:
if (msg != NULL)
{
char *resp;
resp = request_response(plug, message, TRUE);
*response = resp;
}
break;
case GS_AUTH_MESSAGE_PROMPT_ECHO_OFF:
if (msg != NULL)
{
char *resp;
resp = request_response(plug, message, FALSE);
*response = resp;
}
break;
case GS_AUTH_MESSAGE_ERROR_MSG:
gs_lock_plug_show_message(plug, message);
break;
case GS_AUTH_MESSAGE_TEXT_INFO:
gs_lock_plug_show_message(plug, message);
break;
default:
g_assert_not_reached();
}
if (*response == NULL)
{
gs_debug("Got no response");
ret = FALSE;
}
else
{
gs_lock_plug_show_message(plug, _("Checking..."));
gs_lock_plug_set_sensitive(plug, FALSE);
}
/* we may have pending events that should be processed before continuing back into PAM */
while (gtk_events_pending())
{
gtk_main_iteration();
}
gs_lock_plug_set_busy(plug);
gs_profile_end(NULL);
return ret;
}
static gboolean reset_idle_cb(GSLockPlug* plug)
{
gs_lock_plug_set_sensitive(plug, TRUE);
gs_lock_plug_show_message(plug, NULL);
return FALSE;
}
static gboolean do_auth_check(GSLockPlug* plug)
{
GError* error;
gboolean res;
error = NULL;
gs_lock_plug_disable_prompt(plug);
gs_lock_plug_set_busy(plug);
res = gs_auth_verify_user(g_get_user_name(), g_getenv("DISPLAY"), auth_message_handler, plug, &error);
gs_debug("Verify user returned: %s", res ? "TRUE" : "FALSE");
if (! res)
{
if (error != NULL)
{
gs_debug("Verify user returned error: %s", error->message);
gs_lock_plug_show_message(plug, error->message);
}
else
{
gs_lock_plug_show_message(plug, _("Authentication failed."));
}
printf("NOTICE=AUTH FAILED\n");
fflush(stdout);
if (error != NULL)
{
g_error_free(error);
}
}
return res;
}
static void response_cb(GSLockPlug* plug, gint response_id)
{
if ((response_id == GS_LOCK_PLUG_RESPONSE_CANCEL) || (response_id == GTK_RESPONSE_DELETE_EVENT))
{
quit_response_cancel();
}
}
static gboolean response_request_quit(void)
{
printf("REQUEST QUIT\n");
fflush(stdout);
return FALSE;
}
static gboolean quit_timeout_cb(gpointer data)
{
gtk_main_quit();
return FALSE;
}
static gboolean auth_check_idle(GSLockPlug* plug)
{
gboolean res;
gboolean again;
static guint loop_counter = 0;
again = TRUE;
res = do_auth_check(plug);
if (res)
{
again = FALSE;
g_idle_add((GSourceFunc) quit_response_ok, NULL);
}
else
{
loop_counter++;
if (loop_counter < MAX_FAILURES)
{
gs_debug ("Authentication failed, retrying (%u)", loop_counter);
g_timeout_add (3000, (GSourceFunc) reset_idle_cb, plug);
}
else
{
gs_debug ("Authentication failed, quitting (max failures)");
again = FALSE;
/* Don't quit immediately, but rather request that mate-screensaver
* terminates us after it has finished the dialog shake. Time out
* after 5 seconds and quit anyway if this doesn't happen though */
g_idle_add((GSourceFunc) response_request_quit, NULL);
g_timeout_add(5000, (GSourceFunc) quit_timeout_cb, NULL);
}
}
return again;
}
static void show_cb(GtkWidget* widget, gpointer data)
{
print_id(widget);
}
static gboolean popup_dialog_idle(void)
{
GtkWidget* widget;
gs_profile_start(NULL);
widget = gs_lock_plug_new();
if (enable_logout)
{
g_object_set(widget, "logout-enabled", TRUE, NULL);
}
#ifdef HAVE_RDA
if (enable_suspend)
{
g_object_set(widget, "suspend-enabled", TRUE, NULL);
}
#endif /* HAVE_RDA */
if (logout_command)
{
g_object_set(widget, "logout-command", logout_command, NULL);
}
if (enable_switch)
{
g_object_set(widget, "switch-enabled", TRUE, NULL);
}
if (status_message)
{
g_object_set(widget, "status-message", status_message, NULL);
}
g_signal_connect(GS_LOCK_PLUG(widget), "response", G_CALLBACK(response_cb), NULL);
g_signal_connect(widget, "show", G_CALLBACK(show_cb), NULL);
gtk_widget_realize(widget);
g_idle_add((GSourceFunc) auth_check_idle, widget);
gs_profile_end(NULL);
return FALSE;
}
/*
* Copyright (c) 1991-2004 Jamie Zawinski <jwz@jwz.org>
* Copyright (c) 2005 William Jon McCann <mccann@jhu.edu>
*
* Initializations that potentially take place as a priveleged user:
If the executable is setuid root, then these initializations
are run as root, before discarding privileges.
*/
static gboolean privileged_initialization(int* argc, char** argv, gboolean verbose)
{
gboolean ret;
char* nolock_reason;
char* orig_uid;
char* uid_message;
gs_profile_start(NULL);
#ifndef NO_LOCKING
/* before hack_uid () for proper permissions */
gs_auth_priv_init();
#endif /* NO_LOCKING */
ret = hack_uid(&nolock_reason, &orig_uid, &uid_message);
if (nolock_reason)
{
g_debug("Locking disabled: %s", nolock_reason);
}
if (uid_message && verbose)
{
g_print("Modified UID: %s", uid_message);
}
g_free(nolock_reason);
g_free(orig_uid);
g_free(uid_message);
gs_profile_end(NULL);
return ret;
}
/*
* Copyright (c) 1991-2004 Jamie Zawinski <jwz@jwz.org>
* Copyright (c) 2005 William Jon McCann <mccann@jhu.edu>
*
* Figure out what locking mechanisms are supported.
*/
static gboolean lock_initialization (int* argc, char** argv, char** nolock_reason, gboolean verbose)
{
if (nolock_reason != NULL)
{
*nolock_reason = NULL;
}
#ifdef NO_LOCKING
if (nolock_reason != NULL)
{
*nolock_reason = g_strdup("not compiled with locking support");
}
return FALSE;
#else /* !NO_LOCKING */
/* Finish initializing locking, now that we're out of privileged code. */
if (!gs_auth_init())
{
if (nolock_reason != NULL)
{
*nolock_reason = g_strdup("error getting password");
}
return FALSE;
}
/* If locking is currently enabled, but the environment indicates that
* we have been launched as MDM's "Background" program, then disable
* locking just in case.
*/
if (getenv("RUNNING_UNDER_MDM"))
{
if (nolock_reason != NULL)
{
*nolock_reason = g_strdup("running under MDM");
}
return FALSE;
}
/* If the server is XDarwin (MacOS X) then disable locking.
* (X grabs only affect X programs, so you can use Command-Tab
* to bring any other Mac program to the front, e.g., Terminal.)
*/
{
gboolean macos = FALSE;
#ifdef __APPLE__
/* Disable locking if *running* on Apple hardware, since we have no
* reliable way to determine whether the server is running on MacOS.
* Hopefully __APPLE__ means "MacOS" and not "Linux on Mac hardware"
* but I'm not really sure about that.
*/
macos = TRUE;
#endif /* __APPLE__ */
if (macos)
{
if (nolock_reason != NULL)
{
*nolock_reason = g_strdup("Cannot lock securely on MacOS X");
}
return FALSE;
}
}
#endif /* NO_LOCKING */
return TRUE;
}
int main(int argc, char** argv)
{
GError* error = NULL;
char* nolock_reason = NULL;
#ifdef ENABLE_NLS
bindtextdomain(GETTEXT_PACKAGE, MATELOCALEDIR);
#ifdef HAVE_BIND_TEXTDOMAIN_CODESET
bind_textdomain_codeset(GETTEXT_PACKAGE, "UTF-8");
#endif
textdomain(GETTEXT_PACKAGE);
#endif
gs_profile_start(NULL);
if (!privileged_initialization(&argc, argv, verbose))
{
response_lock_init_failed();
exit(1);
}
error = NULL;
if (!gtk_init_with_args(&argc, &argv, NULL, entries, NULL, &error))
{
if (error != NULL)
{
fprintf(stderr, "%s", error->message);
g_error_free(error);
}
exit(1);
}
if (show_version)
{
g_print("%s %s\n", argv[0], VERSION);
exit(1);
}
if (!lock_initialization(&argc, argv, &nolock_reason, verbose))
{
if (nolock_reason != NULL)
{
g_debug ("Screen locking disabled: %s", nolock_reason);
g_free (nolock_reason);
}
response_lock_init_failed();
exit (1);
}
gs_debug_init(verbose, FALSE);
g_idle_add((GSourceFunc) popup_dialog_idle, NULL);
gtk_main();
gs_profile_end(NULL);
gs_debug_shutdown();
return 0;
}
|