D-Bus: dbus-auth.c Source File

D-Bus 1.10.22

dbus-auth.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-auth.c Authentication
3 *
4 * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
5 *
6 * Licensed under the Academic Free License version 2.1
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24 #include <config.h>
25 #include "dbus-auth.h"
26 #include "dbus-string.h"
27 #include "dbus-list.h"
28 #include "dbus-internals.h"
29 #include "dbus-keyring.h"
30 #include "dbus-sha.h"
31 #include "dbus-protocol.h"
32 #include "dbus-credentials.h"
33
70 typedef dbus_bool_t (* DBusInitialResponseFunction) (DBusAuth *auth,
71 DBusString *response);
72
77 typedef dbus_bool_t (* DBusAuthDataFunction) (DBusAuth *auth,
78 const DBusString *data);
79
83 typedef dbus_bool_t (* DBusAuthEncodeFunction) (DBusAuth *auth,
84 const DBusString *data,
85 DBusString *encoded);
86
90 typedef dbus_bool_t (* DBusAuthDecodeFunction) (DBusAuth *auth,
91 const DBusString *data,
92 DBusString *decoded);
93
97 typedef void (* DBusAuthShutdownFunction) (DBusAuth *auth);
98
102 typedef struct
103 {
104 const char *mechanism;
105 DBusAuthDataFunction server_data_func;
106 DBusAuthEncodeFunction server_encode_func;
107 DBusAuthDecodeFunction server_decode_func;
108 DBusAuthShutdownFunction server_shutdown_func;
109 DBusInitialResponseFunction client_initial_response_func;
110 DBusAuthDataFunction client_data_func;
111 DBusAuthEncodeFunction client_encode_func;
112 DBusAuthDecodeFunction client_decode_func;
113 DBusAuthShutdownFunction client_shutdown_func;
114 } DBusAuthMechanismHandler;
115
119 typedef enum {
120 DBUS_AUTH_COMMAND_AUTH,
121 DBUS_AUTH_COMMAND_CANCEL,
122 DBUS_AUTH_COMMAND_DATA,
123 DBUS_AUTH_COMMAND_BEGIN,
124 DBUS_AUTH_COMMAND_REJECTED,
125 DBUS_AUTH_COMMAND_OK,
126 DBUS_AUTH_COMMAND_ERROR,
127 DBUS_AUTH_COMMAND_UNKNOWN,
128 DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD,
129 DBUS_AUTH_COMMAND_AGREE_UNIX_FD
130 } DBusAuthCommand;
131
137 typedef dbus_bool_t (* DBusAuthStateFunction) (DBusAuth *auth,
138 DBusAuthCommand command,
139 const DBusString *args);
140
144 typedef struct
145 {
146 const char *name;
147 DBusAuthStateFunction handler;
148 } DBusAuthStateData;
149
153 struct DBusAuth
154 {
155 int refcount;
156 const char *side;
158 DBusString incoming;
159 DBusString outgoing;
161 const DBusAuthStateData *state;
163 const DBusAuthMechanismHandler *mech;
165 DBusString identity;
169 DBusCredentials *credentials;
172 DBusCredentials *authorized_identity;
174 DBusCredentials *desired_identity;
176 DBusString context;
177 DBusKeyring *keyring;
178 int cookie_id;
179 DBusString challenge;
181 char **allowed_mechs;
185 unsigned int needed_memory : 1;
188 unsigned int already_got_mechanisms : 1;
189 unsigned int already_asked_for_initial_response : 1;
190 unsigned int buffer_outstanding : 1;
192 unsigned int unix_fd_possible : 1;
193 unsigned int unix_fd_negotiated : 1;
194 };
195
199 typedef struct
200 {
201 DBusAuth base;
203 DBusList *mechs_to_try;
205 DBusString guid_from_server;
207 } DBusAuthClient;
208
212 typedef struct
213 {
214 DBusAuth base;
216 int failures;
217 int max_failures;
219 DBusString guid;
221 } DBusAuthServer;
222
223 static void goto_state (DBusAuth *auth,
224 const DBusAuthStateData *new_state);
225 static dbus_bool_t send_auth (DBusAuth *auth,
226 const DBusAuthMechanismHandler *mech);
227 static dbus_bool_t send_data (DBusAuth *auth,
228 DBusString *data);
229 static dbus_bool_t send_rejected (DBusAuth *auth);
230 static dbus_bool_t send_error (DBusAuth *auth,
231 const char *message);
232 static dbus_bool_t send_ok (DBusAuth *auth);
233 static dbus_bool_t send_begin (DBusAuth *auth);
234 static dbus_bool_t send_cancel (DBusAuth *auth);
235 static dbus_bool_t send_negotiate_unix_fd (DBusAuth *auth);
236 static dbus_bool_t send_agree_unix_fd (DBusAuth *auth);
237
242 static dbus_bool_t handle_server_state_waiting_for_auth (DBusAuth *auth,
243 DBusAuthCommand command,
244 const DBusString *args);
245 static dbus_bool_t handle_server_state_waiting_for_data (DBusAuth *auth,
246 DBusAuthCommand command,
247 const DBusString *args);
248 static dbus_bool_t handle_server_state_waiting_for_begin (DBusAuth *auth,
249 DBusAuthCommand command,
250 const DBusString *args);
251
252 static const DBusAuthStateData server_state_waiting_for_auth = {
253 "WaitingForAuth", handle_server_state_waiting_for_auth
254 };
255 static const DBusAuthStateData server_state_waiting_for_data = {
256 "WaitingForData", handle_server_state_waiting_for_data
257 };
258 static const DBusAuthStateData server_state_waiting_for_begin = {
259 "WaitingForBegin", handle_server_state_waiting_for_begin
260 };
261
266 static dbus_bool_t handle_client_state_waiting_for_data (DBusAuth *auth,
267 DBusAuthCommand command,
268 const DBusString *args);
269 static dbus_bool_t handle_client_state_waiting_for_ok (DBusAuth *auth,
270 DBusAuthCommand command,
271 const DBusString *args);
272 static dbus_bool_t handle_client_state_waiting_for_reject (DBusAuth *auth,
273 DBusAuthCommand command,
274 const DBusString *args);
275 static dbus_bool_t handle_client_state_waiting_for_agree_unix_fd (DBusAuth *auth,
276 DBusAuthCommand command,
277 const DBusString *args);
278
279 static const DBusAuthStateData client_state_need_send_auth = {
280 "NeedSendAuth", NULL
281 };
282 static const DBusAuthStateData client_state_waiting_for_data = {
283 "WaitingForData", handle_client_state_waiting_for_data
284 };
285 /* The WaitingForOK state doesn't appear to be used.
286 * See https://bugs.freedesktop.org/show_bug.cgi?id=97298 */
287 _DBUS_GNUC_UNUSED
288 static const DBusAuthStateData client_state_waiting_for_ok = {
289 "WaitingForOK", handle_client_state_waiting_for_ok
290 };
291 static const DBusAuthStateData client_state_waiting_for_reject = {
292 "WaitingForReject", handle_client_state_waiting_for_reject
293 };
294 static const DBusAuthStateData client_state_waiting_for_agree_unix_fd = {
295 "WaitingForAgreeUnixFD", handle_client_state_waiting_for_agree_unix_fd
296 };
297
302 static const DBusAuthStateData common_state_authenticated = {
303 "Authenticated", NULL
304 };
305
306 static const DBusAuthStateData common_state_need_disconnect = {
307 "NeedDisconnect", NULL
308 };
309
310 static const char auth_side_client[] = "client";
311 static const char auth_side_server[] = "server";
316 #define DBUS_AUTH_IS_SERVER(auth) ((auth)->side == auth_side_server)
317
321 #define DBUS_AUTH_IS_CLIENT(auth) ((auth)->side == auth_side_client)
322
326 #define DBUS_AUTH_CLIENT(auth) ((DBusAuthClient*)(auth))
327
331 #define DBUS_AUTH_SERVER(auth) ((DBusAuthServer*)(auth))
332
338 #define DBUS_AUTH_NAME(auth) ((auth)->side)
339
340 static DBusAuth*
341 _dbus_auth_new (int size)
342 {
343 DBusAuth *auth;
344
345 auth = dbus_malloc0 (size);
346 if (auth == NULL)
347 return NULL;
348
349 auth->refcount = 1;
350
351 auth->keyring = NULL;
352 auth->cookie_id = -1;
353
354 /* note that we don't use the max string length feature,
355 * because you can't use that feature if you're going to
356 * try to recover from out-of-memory (it creates
357 * what looks like unrecoverable inability to alloc
358 * more space in the string). But we do handle
359 * overlong buffers in _dbus_auth_do_work().
360 */
361
362 if (!_dbus_string_init (&auth->incoming))
363 goto enomem_0;
364
365 if (!_dbus_string_init (&auth->outgoing))
366 goto enomem_1;
367
368 if (!_dbus_string_init (&auth->identity))
369 goto enomem_2;
370
371 if (!_dbus_string_init (&auth->context))
372 goto enomem_3;
373
374 if (!_dbus_string_init (&auth->challenge))
375 goto enomem_4;
376
377 /* default context if none is specified */
378 if (!_dbus_string_append (&auth->context, "org_freedesktop_general"))
379 goto enomem_5;
380
381 auth->credentials = _dbus_credentials_new ();
382 if (auth->credentials == NULL)
383 goto enomem_6;
384
385 auth->authorized_identity = _dbus_credentials_new ();
386 if (auth->authorized_identity == NULL)
387 goto enomem_7;
388
389 auth->desired_identity = _dbus_credentials_new ();
390 if (auth->desired_identity == NULL)
391 goto enomem_8;
392
393 return auth;
394
395 #if 0
396 enomem_9:
397 _dbus_credentials_unref (auth->desired_identity);
398 #endif
399 enomem_8:
400 _dbus_credentials_unref (auth->authorized_identity);
401 enomem_7:
402 _dbus_credentials_unref (auth->credentials);
403 enomem_6:
404 /* last alloc was an append to context, which is freed already below */ ;
405 enomem_5:
406 _dbus_string_free (&auth->challenge);
407 enomem_4:
408 _dbus_string_free (&auth->context);
409 enomem_3:
410 _dbus_string_free (&auth->identity);
411 enomem_2:
412 _dbus_string_free (&auth->outgoing);
413 enomem_1:
414 _dbus_string_free (&auth->incoming);
415 enomem_0:
416 dbus_free (auth);
417 return NULL;
418 }
419
420 static void
421 shutdown_mech (DBusAuth *auth)
422 {
423 /* Cancel any auth */
424 auth->already_asked_for_initial_response = FALSE;
425 _dbus_string_set_length (&auth->identity, 0);
426
427 _dbus_credentials_clear (auth->authorized_identity);
428 _dbus_credentials_clear (auth->desired_identity);
429
430 if (auth->mech != NULL)
431 {
432 _dbus_verbose ("%s: Shutting down mechanism %s\n",
433 DBUS_AUTH_NAME (auth), auth->mech->mechanism);
434
435 if (DBUS_AUTH_IS_CLIENT (auth))
436 (* auth->mech->client_shutdown_func) (auth);
437 else
438 (* auth->mech->server_shutdown_func) (auth);
439
440 auth->mech = NULL;
441 }
442 }
443
444 /*
445 * DBUS_COOKIE_SHA1 mechanism
446 */
447
448 /* Returns TRUE but with an empty string hash if the
449 * cookie_id isn't known. As with all this code
450 * TRUE just means we had enough memory.
451 */
452 static dbus_bool_t
453 sha1_compute_hash (DBusAuth *auth,
454 int cookie_id,
455 const DBusString *server_challenge,
456 const DBusString *client_challenge,
457 DBusString *hash)
458 {
459 DBusString cookie;
460 DBusString to_hash;
461 dbus_bool_t retval;
462
463 _dbus_assert (auth->keyring != NULL);
464
465 retval = FALSE;
466
467 if (!_dbus_string_init (&cookie))
468 return FALSE;
469
470 if (!_dbus_keyring_get_hex_key (auth->keyring, cookie_id,
471 &cookie))
472 goto out_0;
473
474 if (_dbus_string_get_length (&cookie) == 0)
475 {
476 retval = TRUE;
477 goto out_0;
478 }
479
480 if (!_dbus_string_init (&to_hash))
481 goto out_0;
482
483 if (!_dbus_string_copy (server_challenge, 0,
484 &to_hash, _dbus_string_get_length (&to_hash)))
485 goto out_1;
486
487 if (!_dbus_string_append (&to_hash, ":"))
488 goto out_1;
489
490 if (!_dbus_string_copy (client_challenge, 0,
491 &to_hash, _dbus_string_get_length (&to_hash)))
492 goto out_1;
493
494 if (!_dbus_string_append (&to_hash, ":"))
495 goto out_1;
496
497 if (!_dbus_string_copy (&cookie, 0,
498 &to_hash, _dbus_string_get_length (&to_hash)))
499 goto out_1;
500
501 if (!_dbus_sha_compute (&to_hash, hash))
502 goto out_1;
503
504 retval = TRUE;
505
506 out_1:
507 _dbus_string_zero (&to_hash);
508 _dbus_string_free (&to_hash);
509 out_0:
510 _dbus_string_zero (&cookie);
511 _dbus_string_free (&cookie);
512 return retval;
513 }
514
519 #define N_CHALLENGE_BYTES (128/8)
520
521 static dbus_bool_t
522 sha1_handle_first_client_response (DBusAuth *auth,
523 const DBusString *data)
524 {
525 /* We haven't sent a challenge yet, we're expecting a desired
526 * username from the client.
527 */
528 DBusString tmp;
529 DBusString tmp2;
530 dbus_bool_t retval = FALSE;
531 DBusError error = DBUS_ERROR_INIT;
532
533 _dbus_string_set_length (&auth->challenge, 0);
534
535 if (_dbus_string_get_length (data) > 0)
536 {
537 if (_dbus_string_get_length (&auth->identity) > 0)
538 {
539 /* Tried to send two auth identities, wtf */
540 _dbus_verbose ("%s: client tried to send auth identity, but we already have one\n",
541 DBUS_AUTH_NAME (auth));
542 return send_rejected (auth);
543 }
544 else
545 {
546 /* this is our auth identity */
547 if (!_dbus_string_copy (data, 0, &auth->identity, 0))
548 return FALSE;
549 }
550 }
551
552 if (!_dbus_credentials_add_from_user (auth->desired_identity, data))
553 {
554 _dbus_verbose ("%s: Did not get a valid username from client\n",
555 DBUS_AUTH_NAME (auth));
556 return send_rejected (auth);
557 }
558
559 if (!_dbus_string_init (&tmp))
560 return FALSE;
561
562 if (!_dbus_string_init (&tmp2))
563 {
564 _dbus_string_free (&tmp);
565 return FALSE;
566 }
567
568 /* we cache the keyring for speed, so here we drop it if it's the
569 * wrong one. FIXME caching the keyring here is useless since we use
570 * a different DBusAuth for every connection.
571 */
572 if (auth->keyring &&
573 !_dbus_keyring_is_for_credentials (auth->keyring,
574 auth->desired_identity))
575 {
576 _dbus_keyring_unref (auth->keyring);
577 auth->keyring = NULL;
578 }
579
580 if (auth->keyring == NULL)
581 {
582 auth->keyring = _dbus_keyring_new_for_credentials (auth->desired_identity,
583 &auth->context,
584 &error);
585
586 if (auth->keyring == NULL)
587 {
588 if (dbus_error_has_name (&error,
589 DBUS_ERROR_NO_MEMORY))
590 {
591 dbus_error_free (&error);
592 goto out;
593 }
594 else
595 {
596 _DBUS_ASSERT_ERROR_IS_SET (&error);
597 _dbus_verbose ("%s: Error loading keyring: %s\n",
598 DBUS_AUTH_NAME (auth), error.message);
599 if (send_rejected (auth))
600 retval = TRUE; /* retval is only about mem */
601 dbus_error_free (&error);
602 goto out;
603 }
604 }
605 else
606 {
607 _dbus_assert (!dbus_error_is_set (&error));
608 }
609 }
610
611 _dbus_assert (auth->keyring != NULL);
612
613 auth->cookie_id = _dbus_keyring_get_best_key (auth->keyring, &error);
614 if (auth->cookie_id < 0)
615 {
616 _DBUS_ASSERT_ERROR_IS_SET (&error);
617 _dbus_verbose ("%s: Could not get a cookie ID to send to client: %s\n",
618 DBUS_AUTH_NAME (auth), error.message);
619 if (send_rejected (auth))
620 retval = TRUE;
621 dbus_error_free (&error);
622 goto out;
623 }
624 else
625 {
626 _dbus_assert (!dbus_error_is_set (&error));
627 }
628
629 if (!_dbus_string_copy (&auth->context, 0,
630 &tmp2, _dbus_string_get_length (&tmp2)))
631 goto out;
632
633 if (!_dbus_string_append (&tmp2, " "))
634 goto out;
635
636 if (!_dbus_string_append_int (&tmp2, auth->cookie_id))
637 goto out;
638
639 if (!_dbus_string_append (&tmp2, " "))
640 goto out;
641
642 if (!_dbus_generate_random_bytes (&tmp, N_CHALLENGE_BYTES, &error))
643 {
644 if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
645 {
646 dbus_error_free (&error);
647 goto out;
648 }
649 else
650 {
651 _DBUS_ASSERT_ERROR_IS_SET (&error);
652 _dbus_verbose ("%s: Error generating challenge: %s\n",
653 DBUS_AUTH_NAME (auth), error.message);
654 if (send_rejected (auth))
655 retval = TRUE; /* retval is only about mem */
656
657 dbus_error_free (&error);
658 goto out;
659 }
660 }
661
662 _dbus_string_set_length (&auth->challenge, 0);
663 if (!_dbus_string_hex_encode (&tmp, 0, &auth->challenge, 0))
664 goto out;
665
666 if (!_dbus_string_hex_encode (&tmp, 0, &tmp2,
667 _dbus_string_get_length (&tmp2)))
668 goto out;
669
670 if (!send_data (auth, &tmp2))
671 goto out;
672
673 goto_state (auth, &server_state_waiting_for_data);
674 retval = TRUE;
675
676 out:
677 _dbus_string_zero (&tmp);
678 _dbus_string_free (&tmp);
679 _dbus_string_zero (&tmp2);
680 _dbus_string_free (&tmp2);
681
682 return retval;
683 }
684
685 static dbus_bool_t
686 sha1_handle_second_client_response (DBusAuth *auth,
687 const DBusString *data)
688 {
689 /* We are expecting a response which is the hex-encoded client
690 * challenge, space, then SHA-1 hash of the concatenation of our
691 * challenge, ":", client challenge, ":", secret key, all
692 * hex-encoded.
693 */
694 int i;
695 DBusString client_challenge;
696 DBusString client_hash;
697 dbus_bool_t retval;
698 DBusString correct_hash;
699
700 retval = FALSE;
701
702 if (!_dbus_string_find_blank (data, 0, &i))
703 {
704 _dbus_verbose ("%s: no space separator in client response\n",
705 DBUS_AUTH_NAME (auth));
706 return send_rejected (auth);
707 }
708
709 if (!_dbus_string_init (&client_challenge))
710 goto out_0;
711
712 if (!_dbus_string_init (&client_hash))
713 goto out_1;
714
715 if (!_dbus_string_copy_len (data, 0, i, &client_challenge,
716 0))
717 goto out_2;
718
719 _dbus_string_skip_blank (data, i, &i);
720
721 if (!_dbus_string_copy_len (data, i,
722 _dbus_string_get_length (data) - i,
723 &client_hash,
724 0))
725 goto out_2;
726
727 if (_dbus_string_get_length (&client_challenge) == 0 ||
728 _dbus_string_get_length (&client_hash) == 0)
729 {
730 _dbus_verbose ("%s: zero-length client challenge or hash\n",
731 DBUS_AUTH_NAME (auth));
732 if (send_rejected (auth))
733 retval = TRUE;
734 goto out_2;
735 }
736
737 if (!_dbus_string_init (&correct_hash))
738 goto out_2;
739
740 if (!sha1_compute_hash (auth, auth->cookie_id,
741 &auth->challenge,
742 &client_challenge,
743 &correct_hash))
744 goto out_3;
745
746 /* if cookie_id was invalid, then we get an empty hash */
747 if (_dbus_string_get_length (&correct_hash) == 0)
748 {
749 if (send_rejected (auth))
750 retval = TRUE;
751 goto out_3;
752 }
753
754 if (!_dbus_string_equal (&client_hash, &correct_hash))
755 {
756 if (send_rejected (auth))
757 retval = TRUE;
758 goto out_3;
759 }
760
761 if (!_dbus_credentials_add_credentials (auth->authorized_identity,
762 auth->desired_identity))
763 goto out_3;
764
765 /* Copy process ID from the socket credentials if it's there
766 */
767 if (!_dbus_credentials_add_credential (auth->authorized_identity,
768 DBUS_CREDENTIAL_UNIX_PROCESS_ID,
769 auth->credentials))
770 goto out_3;
771
772 if (!send_ok (auth))
773 goto out_3;
774
775 _dbus_verbose ("%s: authenticated client using DBUS_COOKIE_SHA1\n",
776 DBUS_AUTH_NAME (auth));
777
778 retval = TRUE;
779
780 out_3:
781 _dbus_string_zero (&correct_hash);
782 _dbus_string_free (&correct_hash);
783 out_2:
784 _dbus_string_zero (&client_hash);
785 _dbus_string_free (&client_hash);
786 out_1:
787 _dbus_string_free (&client_challenge);
788 out_0:
789 return retval;
790 }
791
792 static dbus_bool_t
793 handle_server_data_cookie_sha1_mech (DBusAuth *auth,
794 const DBusString *data)
795 {
796 if (auth->cookie_id < 0)
797 return sha1_handle_first_client_response (auth, data);
798 else
799 return sha1_handle_second_client_response (auth, data);
800 }
801
802 static void
803 handle_server_shutdown_cookie_sha1_mech (DBusAuth *auth)
804 {
805 auth->cookie_id = -1;
806 _dbus_string_set_length (&auth->challenge, 0);
807 }
808
809 static dbus_bool_t
810 handle_client_initial_response_cookie_sha1_mech (DBusAuth *auth,
811 DBusString *response)
812 {
813 DBusString username;
814 dbus_bool_t retval;
815
816 retval = FALSE;
817
818 if (!_dbus_string_init (&username))
819 return FALSE;
820
821 if (!_dbus_append_user_from_current_process (&username))
822 goto out_0;
823
824 if (!_dbus_string_hex_encode (&username, 0,
825 response,
826 _dbus_string_get_length (response)))
827 goto out_0;
828
829 retval = TRUE;
830
831 out_0:
832 _dbus_string_free (&username);
833
834 return retval;
835 }
836
837 static dbus_bool_t
838 handle_client_data_cookie_sha1_mech (DBusAuth *auth,
839 const DBusString *data)
840 {
841 /* The data we get from the server should be the cookie context
842 * name, the cookie ID, and the server challenge, separated by
843 * spaces. We send back our challenge string and the correct hash.
844 */
845 dbus_bool_t retval = FALSE;
846 DBusString context;
847 DBusString cookie_id_str;
848 DBusString server_challenge;
849 DBusString client_challenge;
850 DBusString correct_hash;
851 DBusString tmp;
852 int i, j;
853 long val;
854 DBusError error = DBUS_ERROR_INIT;
855
856 if (!_dbus_string_find_blank (data, 0, &i))
857 {
858 if (send_error (auth,
859 "Server did not send context/ID/challenge properly"))
860 retval = TRUE;
861 goto out_0;
862 }
863
864 if (!_dbus_string_init (&context))
865 goto out_0;
866
867 if (!_dbus_string_copy_len (data, 0, i,
868 &context, 0))
869 goto out_1;
870
871 _dbus_string_skip_blank (data, i, &i);
872 if (!_dbus_string_find_blank (data, i, &j))
873 {
874 if (send_error (auth,
875 "Server did not send context/ID/challenge properly"))
876 retval = TRUE;
877 goto out_1;
878 }
879
880 if (!_dbus_string_init (&cookie_id_str))
881 goto out_1;
882
883 if (!_dbus_string_copy_len (data, i, j - i,
884 &cookie_id_str, 0))
885 goto out_2;
886
887 if (!_dbus_string_init (&server_challenge))
888 goto out_2;
889
890 i = j;
891 _dbus_string_skip_blank (data, i, &i);
892 j = _dbus_string_get_length (data);
893
894 if (!_dbus_string_copy_len (data, i, j - i,
895 &server_challenge, 0))
896 goto out_3;
897
898 if (!_dbus_keyring_validate_context (&context))
899 {
900 if (send_error (auth, "Server sent invalid cookie context"))
901 retval = TRUE;
902 goto out_3;
903 }
904
905 if (!_dbus_string_parse_int (&cookie_id_str, 0, &val, NULL))
906 {
907 if (send_error (auth, "Could not parse cookie ID as an integer"))
908 retval = TRUE;
909 goto out_3;
910 }
911
912 if (_dbus_string_get_length (&server_challenge) == 0)
913 {
914 if (send_error (auth, "Empty server challenge string"))
915 retval = TRUE;
916 goto out_3;
917 }
918
919 if (auth->keyring == NULL)
920 {
921 auth->keyring = _dbus_keyring_new_for_credentials (NULL,
922 &context,
923 &error);
924
925 if (auth->keyring == NULL)
926 {
927 if (dbus_error_has_name (&error,
928 DBUS_ERROR_NO_MEMORY))
929 {
930 dbus_error_free (&error);
931 goto out_3;
932 }
933 else
934 {
935 _DBUS_ASSERT_ERROR_IS_SET (&error);
936
937 _dbus_verbose ("%s: Error loading keyring: %s\n",
938 DBUS_AUTH_NAME (auth), error.message);
939
940 if (send_error (auth, "Could not load cookie file"))
941 retval = TRUE; /* retval is only about mem */
942
943 dbus_error_free (&error);
944 goto out_3;
945 }
946 }
947 else
948 {
949 _dbus_assert (!dbus_error_is_set (&error));
950 }
951 }
952
953 _dbus_assert (auth->keyring != NULL);
954
955 if (!_dbus_string_init (&tmp))
956 goto out_3;
957
958 if (!_dbus_generate_random_bytes (&tmp, N_CHALLENGE_BYTES, &error))
959 {
960 if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
961 {
962 dbus_error_free (&error);
963 goto out_4;
964 }
965 else
966 {
967 _DBUS_ASSERT_ERROR_IS_SET (&error);
968
969 _dbus_verbose ("%s: Failed to generate challenge: %s\n",
970 DBUS_AUTH_NAME (auth), error.message);
971
972 if (send_error (auth, "Failed to generate challenge"))
973 retval = TRUE; /* retval is only about mem */
974
975 dbus_error_free (&error);
976 goto out_4;
977 }
978 }
979
980 if (!_dbus_string_init (&client_challenge))
981 goto out_4;
982
983 if (!_dbus_string_hex_encode (&tmp, 0, &client_challenge, 0))
984 goto out_5;
985
986 if (!_dbus_string_init (&correct_hash))
987 goto out_5;
988
989 if (!sha1_compute_hash (auth, val,
990 &server_challenge,
991 &client_challenge,
992 &correct_hash))
993 goto out_6;
994
995 if (_dbus_string_get_length (&correct_hash) == 0)
996 {
997 /* couldn't find the cookie ID or something */
998 if (send_error (auth, "Don't have the requested cookie ID"))
999 retval = TRUE;
1000 goto out_6;
1001 }
1002
1003 _dbus_string_set_length (&tmp, 0);
1004
1005 if (!_dbus_string_copy (&client_challenge, 0, &tmp,
1006 _dbus_string_get_length (&tmp)))
1007 goto out_6;
1008
1009 if (!_dbus_string_append (&tmp, " "))
1010 goto out_6;
1011
1012 if (!_dbus_string_copy (&correct_hash, 0, &tmp,
1013 _dbus_string_get_length (&tmp)))
1014 goto out_6;
1015
1016 if (!send_data (auth, &tmp))
1017 goto out_6;
1018
1019 retval = TRUE;
1020
1021 out_6:
1022 _dbus_string_zero (&correct_hash);
1023 _dbus_string_free (&correct_hash);
1024 out_5:
1025 _dbus_string_free (&client_challenge);
1026 out_4:
1027 _dbus_string_zero (&tmp);
1028 _dbus_string_free (&tmp);
1029 out_3:
1030 _dbus_string_free (&server_challenge);
1031 out_2:
1032 _dbus_string_free (&cookie_id_str);
1033 out_1:
1034 _dbus_string_free (&context);
1035 out_0:
1036 return retval;
1037 }
1038
1039 static void
1040 handle_client_shutdown_cookie_sha1_mech (DBusAuth *auth)
1041 {
1042 auth->cookie_id = -1;
1043 _dbus_string_set_length (&auth->challenge, 0);
1044 }
1045
1046 /*
1047 * EXTERNAL mechanism
1048 */
1049
1050 static dbus_bool_t
1051 handle_server_data_external_mech (DBusAuth *auth,
1052 const DBusString *data)
1053 {
1054 if (_dbus_credentials_are_anonymous (auth->credentials))
1055 {
1056 _dbus_verbose ("%s: no credentials, mechanism EXTERNAL can't authenticate\n",
1057 DBUS_AUTH_NAME (auth));
1058 return send_rejected (auth);
1059 }
1060
1061 if (_dbus_string_get_length (data) > 0)
1062 {
1063 if (_dbus_string_get_length (&auth->identity) > 0)
1064 {
1065 /* Tried to send two auth identities, wtf */
1066 _dbus_verbose ("%s: client tried to send auth identity, but we already have one\n",
1067 DBUS_AUTH_NAME (auth));
1068 return send_rejected (auth);
1069 }
1070 else
1071 {
1072 /* this is our auth identity */
1073 if (!_dbus_string_copy (data, 0, &auth->identity, 0))
1074 return FALSE;
1075 }
1076 }
1077
1078 /* Poke client for an auth identity, if none given */
1079 if (_dbus_string_get_length (&auth->identity) == 0 &&
1080 !auth->already_asked_for_initial_response)
1081 {
1082 if (send_data (auth, NULL))
1083 {
1084 _dbus_verbose ("%s: sending empty challenge asking client for auth identity\n",
1085 DBUS_AUTH_NAME (auth));
1086 auth->already_asked_for_initial_response = TRUE;
1087 goto_state (auth, &server_state_waiting_for_data);
1088 return TRUE;
1089 }
1090 else
1091 return FALSE;
1092 }
1093
1094 _dbus_credentials_clear (auth->desired_identity);
1095
1096 /* If auth->identity is still empty here, then client
1097 * responded with an empty string after we poked it for
1098 * an initial response. This means to try to auth the
1099 * identity provided in the credentials.
1100 */
1101 if (_dbus_string_get_length (&auth->identity) == 0)
1102 {
1103 if (!_dbus_credentials_add_credentials (auth->desired_identity,
1104 auth->credentials))
1105 {
1106 return FALSE; /* OOM */
1107 }
1108 }
1109 else
1110 {
1111 if (!_dbus_credentials_add_from_user (auth->desired_identity,
1112 &auth->identity))
1113 {
1114 _dbus_verbose ("%s: could not get credentials from uid string\n",
1115 DBUS_AUTH_NAME (auth));
1116 return send_rejected (auth);
1117 }
1118 }
1119
1120 if (_dbus_credentials_are_anonymous (auth->desired_identity))
1121 {
1122 _dbus_verbose ("%s: desired user %s is no good\n",
1123 DBUS_AUTH_NAME (auth),
1124 _dbus_string_get_const_data (&auth->identity));
1125 return send_rejected (auth);
1126 }
1127
1128 if (_dbus_credentials_are_superset (auth->credentials,
1129 auth->desired_identity))
1130 {
1131 /* client has authenticated */
1132 if (!_dbus_credentials_add_credentials (auth->authorized_identity,
1133 auth->desired_identity))
1134 return FALSE;
1135
1136 /* also copy misc process info from the socket credentials
1137 */
1138 if (!_dbus_credentials_add_credential (auth->authorized_identity,
1139 DBUS_CREDENTIAL_UNIX_PROCESS_ID,
1140 auth->credentials))
1141 return FALSE;
1142
1143 if (!_dbus_credentials_add_credential (auth->authorized_identity,
1144 DBUS_CREDENTIAL_ADT_AUDIT_DATA_ID,
1145 auth->credentials))
1146 return FALSE;
1147
1148 if (!_dbus_credentials_add_credential (auth->authorized_identity,
1149 DBUS_CREDENTIAL_LINUX_SECURITY_LABEL,
1150 auth->credentials))
1151 return FALSE;
1152
1153 if (!send_ok (auth))
1154 return FALSE;
1155
1156 _dbus_verbose ("%s: authenticated client based on socket credentials\n",
1157 DBUS_AUTH_NAME (auth));
1158
1159 return TRUE;
1160 }
1161 else
1162 {
1163 _dbus_verbose ("%s: desired identity not found in socket credentials\n",
1164 DBUS_AUTH_NAME (auth));
1165 return send_rejected (auth);
1166 }
1167 }
1168
1169 static void
1170 handle_server_shutdown_external_mech (DBusAuth *auth)
1171 {
1172
1173 }
1174
1175 static dbus_bool_t
1176 handle_client_initial_response_external_mech (DBusAuth *auth,
1177 DBusString *response)
1178 {
1179 /* We always append our UID as an initial response, so the server
1180 * doesn't have to send back an empty challenge to check whether we
1181 * want to specify an identity. i.e. this avoids a round trip that
1182 * the spec for the EXTERNAL mechanism otherwise requires.
1183 */
1184 DBusString plaintext;
1185
1186 if (!_dbus_string_init (&plaintext))
1187 return FALSE;
1188
1189 if (!_dbus_append_user_from_current_process (&plaintext))
1190 goto failed;
1191
1192 if (!_dbus_string_hex_encode (&plaintext, 0,
1193 response,
1194 _dbus_string_get_length (response)))
1195 goto failed;
1196
1197 _dbus_string_free (&plaintext);
1198
1199 return TRUE;
1200
1201 failed:
1202 _dbus_string_free (&plaintext);
1203 return FALSE;
1204 }
1205
1206 static dbus_bool_t
1207 handle_client_data_external_mech (DBusAuth *auth,
1208 const DBusString *data)
1209 {
1210
1211 return TRUE;
1212 }
1213
1214 static void
1215 handle_client_shutdown_external_mech (DBusAuth *auth)
1216 {
1217
1218 }
1219
1220 /*
1221 * ANONYMOUS mechanism
1222 */
1223
1224 static dbus_bool_t
1225 handle_server_data_anonymous_mech (DBusAuth *auth,
1226 const DBusString *data)
1227 {
1228 if (_dbus_string_get_length (data) > 0)
1229 {
1230 /* Client is allowed to send "trace" data, the only defined
1231 * meaning is that if it contains '@' it is an email address,
1232 * and otherwise it is anything else, and it's supposed to be
1233 * UTF-8
1234 */
1235 if (!_dbus_string_validate_utf8 (data, 0, _dbus_string_get_length (data)))
1236 {
1237 _dbus_verbose ("%s: Received invalid UTF-8 trace data from ANONYMOUS client\n",
1238 DBUS_AUTH_NAME (auth));
1239 return send_rejected (auth);
1240 }
1241
1242 _dbus_verbose ("%s: ANONYMOUS client sent trace string: '%s'\n",
1243 DBUS_AUTH_NAME (auth),
1244 _dbus_string_get_const_data (data));
1245 }
1246
1247 /* We want to be anonymous (clear in case some other protocol got midway through I guess) */
1248 _dbus_credentials_clear (auth->desired_identity);
1249
1250 /* Copy process ID from the socket credentials
1251 */
1252 if (!_dbus_credentials_add_credential (auth->authorized_identity,
1253 DBUS_CREDENTIAL_UNIX_PROCESS_ID,
1254 auth->credentials))
1255 return FALSE;
1256
1257 /* Anonymous is always allowed */
1258 if (!send_ok (auth))
1259 return FALSE;
1260
1261 _dbus_verbose ("%s: authenticated client as anonymous\n",
1262 DBUS_AUTH_NAME (auth));
1263
1264 return TRUE;
1265 }
1266
1267 static void
1268 handle_server_shutdown_anonymous_mech (DBusAuth *auth)
1269 {
1270
1271 }
1272
1273 static dbus_bool_t
1274 handle_client_initial_response_anonymous_mech (DBusAuth *auth,
1275 DBusString *response)
1276 {
1277 /* Our initial response is a "trace" string which must be valid UTF-8
1278 * and must be an email address if it contains '@'.
1279 * We just send the dbus implementation info, like a user-agent or
1280 * something, because... why not. There's nothing guaranteed here
1281 * though, we could change it later.
1282 */
1283 DBusString plaintext;
1284
1285 if (!_dbus_string_init (&plaintext))
1286 return FALSE;
1287
1288 if (!_dbus_string_append (&plaintext,
1289 "libdbus " DBUS_VERSION_STRING))
1290 goto failed;
1291
1292 if (!_dbus_string_hex_encode (&plaintext, 0,
1293 response,
1294 _dbus_string_get_length (response)))
1295 goto failed;
1296
1297 _dbus_string_free (&plaintext);
1298
1299 return TRUE;
1300
1301 failed:
1302 _dbus_string_free (&plaintext);
1303 return FALSE;
1304 }
1305
1306 static dbus_bool_t
1307 handle_client_data_anonymous_mech (DBusAuth *auth,
1308 const DBusString *data)
1309 {
1310
1311 return TRUE;
1312 }
1313
1314 static void
1315 handle_client_shutdown_anonymous_mech (DBusAuth *auth)
1316 {
1317
1318 }
1319
1320 /* Put mechanisms here in order of preference.
1321 * Right now we have:
1322 *
1323 * - EXTERNAL checks socket credentials (or in the future, other info from the OS)
1324 * - DBUS_COOKIE_SHA1 uses a cookie in the home directory, like xauth or ICE
1325 * - ANONYMOUS checks nothing but doesn't auth the person as a user
1326 *
1327 * We might ideally add a mechanism to chain to Cyrus SASL so we can
1328 * use its mechanisms as well.
1329 *
1330 */
1331 static const DBusAuthMechanismHandler
1332 all_mechanisms[] = {
1333 { "EXTERNAL",
1334 handle_server_data_external_mech,
1335 NULL, NULL,
1336 handle_server_shutdown_external_mech,
1337 handle_client_initial_response_external_mech,
1338 handle_client_data_external_mech,
1339 NULL, NULL,
1340 handle_client_shutdown_external_mech },
1341 { "DBUS_COOKIE_SHA1",
1342 handle_server_data_cookie_sha1_mech,
1343 NULL, NULL,
1344 handle_server_shutdown_cookie_sha1_mech,
1345 handle_client_initial_response_cookie_sha1_mech,
1346 handle_client_data_cookie_sha1_mech,
1347 NULL, NULL,
1348 handle_client_shutdown_cookie_sha1_mech },
1349 { "ANONYMOUS",
1350 handle_server_data_anonymous_mech,
1351 NULL, NULL,
1352 handle_server_shutdown_anonymous_mech,
1353 handle_client_initial_response_anonymous_mech,
1354 handle_client_data_anonymous_mech,
1355 NULL, NULL,
1356 handle_client_shutdown_anonymous_mech },
1357 { NULL, NULL }
1358 };
1359
1360 static const DBusAuthMechanismHandler*
1361 find_mech (const DBusString *name,
1362 char **allowed_mechs)
1363 {
1364 int i;
1365
1366 if (allowed_mechs != NULL &&
1367 !_dbus_string_array_contains ((const char**) allowed_mechs,
1368 _dbus_string_get_const_data (name)))
1369 return NULL;
1370
1371 i = 0;
1372 while (all_mechanisms[i].mechanism != NULL)
1373 {
1374 if (_dbus_string_equal_c_str (name,
1375 all_mechanisms[i].mechanism))
1376
1377 return &all_mechanisms[i];
1378
1379 ++i;
1380 }
1381
1382 return NULL;
1383 }
1384
1385 static dbus_bool_t
1386 send_auth (DBusAuth *auth, const DBusAuthMechanismHandler *mech)
1387 {
1388 DBusString auth_command;
1389
1390 if (!_dbus_string_init (&auth_command))
1391 return FALSE;
1392
1393 if (!_dbus_string_append (&auth_command,
1394 "AUTH "))
1395 {
1396 _dbus_string_free (&auth_command);
1397 return FALSE;
1398 }
1399
1400 if (!_dbus_string_append (&auth_command,
1401 mech->mechanism))
1402 {
1403 _dbus_string_free (&auth_command);
1404 return FALSE;
1405 }
1406
1407 if (mech->client_initial_response_func != NULL)
1408 {
1409 if (!_dbus_string_append (&auth_command, " "))
1410 {
1411 _dbus_string_free (&auth_command);
1412 return FALSE;
1413 }
1414
1415 if (!(* mech->client_initial_response_func) (auth, &auth_command))
1416 {
1417 _dbus_string_free (&auth_command);
1418 return FALSE;
1419 }
1420 }
1421
1422 if (!_dbus_string_append (&auth_command,
1423 "\r\n"))
1424 {
1425 _dbus_string_free (&auth_command);
1426 return FALSE;
1427 }
1428
1429 if (!_dbus_string_copy (&auth_command, 0,
1430 &auth->outgoing,
1431 _dbus_string_get_length (&auth->outgoing)))
1432 {
1433 _dbus_string_free (&auth_command);
1434 return FALSE;
1435 }
1436
1437 _dbus_string_free (&auth_command);
1438 shutdown_mech (auth);
1439 auth->mech = mech;
1440 goto_state (auth, &client_state_waiting_for_data);
1441
1442 return TRUE;
1443 }
1444
1445 static dbus_bool_t
1446 send_data (DBusAuth *auth, DBusString *data)
1447 {
1448 int old_len;
1449
1450 if (data == NULL || _dbus_string_get_length (data) == 0)
1451 return _dbus_string_append (&auth->outgoing, "DATA\r\n");
1452 else
1453 {
1454 old_len = _dbus_string_get_length (&auth->outgoing);
1455 if (!_dbus_string_append (&auth->outgoing, "DATA "))
1456 goto out;
1457
1458 if (!_dbus_string_hex_encode (data, 0, &auth->outgoing,
1459 _dbus_string_get_length (&auth->outgoing)))
1460 goto out;
1461
1462 if (!_dbus_string_append (&auth->outgoing, "\r\n"))
1463 goto out;
1464
1465 return TRUE;
1466
1467 out:
1468 _dbus_string_set_length (&auth->outgoing, old_len);
1469
1470 return FALSE;
1471 }
1472 }
1473
1474 static dbus_bool_t
1475 send_rejected (DBusAuth *auth)
1476 {
1477 DBusString command;
1478 DBusAuthServer *server_auth;
1479 int i;
1480
1481 if (!_dbus_string_init (&command))
1482 return FALSE;
1483
1484 if (!_dbus_string_append (&command,
1485 "REJECTED"))
1486 goto nomem;
1487
1488 i = 0;
1489 while (all_mechanisms[i].mechanism != NULL)
1490 {
1491 if (!_dbus_string_append (&command,
1492 " "))
1493 goto nomem;
1494
1495 if (!_dbus_string_append (&command,
1496 all_mechanisms[i].mechanism))
1497 goto nomem;
1498
1499 ++i;
1500 }
1501
1502 if (!_dbus_string_append (&command, "\r\n"))
1503 goto nomem;
1504
1505 if (!_dbus_string_copy (&command, 0, &auth->outgoing,
1506 _dbus_string_get_length (&auth->outgoing)))
1507 goto nomem;
1508
1509 shutdown_mech (auth);
1510
1511 _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
1512 server_auth = DBUS_AUTH_SERVER (auth);
1513 server_auth->failures += 1;
1514
1515 if (server_auth->failures >= server_auth->max_failures)
1516 goto_state (auth, &common_state_need_disconnect);
1517 else
1518 goto_state (auth, &server_state_waiting_for_auth);
1519
1520 _dbus_string_free (&command);
1521
1522 return TRUE;
1523
1524 nomem:
1525 _dbus_string_free (&command);
1526 return FALSE;
1527 }
1528
1529 static dbus_bool_t
1530 send_error (DBusAuth *auth, const char *message)
1531 {
1532 return _dbus_string_append_printf (&auth->outgoing,
1533 "ERROR \"%s\"\r\n", message);
1534 }
1535
1536 static dbus_bool_t
1537 send_ok (DBusAuth *auth)
1538 {
1539 int orig_len;
1540
1541 orig_len = _dbus_string_get_length (&auth->outgoing);
1542
1543 if (_dbus_string_append (&auth->outgoing, "OK ") &&
1544 _dbus_string_copy (& DBUS_AUTH_SERVER (auth)->guid,
1545 0,
1546 &auth->outgoing,
1547 _dbus_string_get_length (&auth->outgoing)) &&
1548 _dbus_string_append (&auth->outgoing, "\r\n"))
1549 {
1550 goto_state (auth, &server_state_waiting_for_begin);
1551 return TRUE;
1552 }
1553 else
1554 {
1555 _dbus_string_set_length (&auth->outgoing, orig_len);
1556 return FALSE;
1557 }
1558 }
1559
1560 static dbus_bool_t
1561 send_begin (DBusAuth *auth)
1562 {
1563
1564 if (!_dbus_string_append (&auth->outgoing,
1565 "BEGIN\r\n"))
1566 return FALSE;
1567
1568 goto_state (auth, &common_state_authenticated);
1569 return TRUE;
1570 }
1571
1572 static dbus_bool_t
1573 process_ok(DBusAuth *auth,
1574 const DBusString *args_from_ok) {
1575
1576 int end_of_hex;
1577
1578 /* "args_from_ok" should be the GUID, whitespace already pulled off the front */
1579 _dbus_assert (_dbus_string_get_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server) == 0);
1580
1581 /* We decode the hex string to binary, using guid_from_server as scratch... */
1582
1583 end_of_hex = 0;
1584 if (!_dbus_string_hex_decode (args_from_ok, 0, &end_of_hex,
1585 & DBUS_AUTH_CLIENT (auth)->guid_from_server, 0))
1586 return FALSE;
1587
1588 /* now clear out the scratch */
1589 _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
1590
1591 if (end_of_hex != _dbus_string_get_length (args_from_ok) ||
1592 end_of_hex == 0)
1593 {
1594 _dbus_verbose ("Bad GUID from server, parsed %d bytes and had %d bytes from server\n",
1595 end_of_hex, _dbus_string_get_length (args_from_ok));
1596 goto_state (auth, &common_state_need_disconnect);
1597 return TRUE;
1598 }
1599
1600 if (!_dbus_string_copy (args_from_ok, 0, &DBUS_AUTH_CLIENT (auth)->guid_from_server, 0)) {
1601 _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
1602 return FALSE;
1603 }
1604
1605 _dbus_verbose ("Got GUID '%s' from the server\n",
1606 _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server));
1607
1608 if (auth->unix_fd_possible)
1609 return send_negotiate_unix_fd(auth);
1610
1611 _dbus_verbose("Not negotiating unix fd passing, since not possible\n");
1612 return send_begin (auth);
1613 }
1614
1615 static dbus_bool_t
1616 send_cancel (DBusAuth *auth)
1617 {
1618 if (_dbus_string_append (&auth->outgoing, "CANCEL\r\n"))
1619 {
1620 goto_state (auth, &client_state_waiting_for_reject);
1621 return TRUE;
1622 }
1623 else
1624 return FALSE;
1625 }
1626
1627 static dbus_bool_t
1628 process_data (DBusAuth *auth,
1629 const DBusString *args,
1630 DBusAuthDataFunction data_func)
1631 {
1632 int end;
1633 DBusString decoded;
1634
1635 if (!_dbus_string_init (&decoded))
1636 return FALSE;
1637
1638 if (!_dbus_string_hex_decode (args, 0, &end, &decoded, 0))
1639 {
1640 _dbus_string_free (&decoded);
1641 return FALSE;
1642 }
1643
1644 if (_dbus_string_get_length (args) != end)
1645 {
1646 _dbus_string_free (&decoded);
1647 if (!send_error (auth, "Invalid hex encoding"))
1648 return FALSE;
1649
1650 return TRUE;
1651 }
1652
1653 #ifdef DBUS_ENABLE_VERBOSE_MODE
1654 if (_dbus_string_validate_ascii (&decoded, 0,
1655 _dbus_string_get_length (&decoded)))
1656 _dbus_verbose ("%s: data: '%s'\n",
1657 DBUS_AUTH_NAME (auth),
1658 _dbus_string_get_const_data (&decoded));
1659 #endif
1660
1661 if (!(* data_func) (auth, &decoded))
1662 {
1663 _dbus_string_free (&decoded);
1664 return FALSE;
1665 }
1666
1667 _dbus_string_free (&decoded);
1668 return TRUE;
1669 }
1670
1671 static dbus_bool_t
1672 send_negotiate_unix_fd (DBusAuth *auth)
1673 {
1674 if (!_dbus_string_append (&auth->outgoing,
1675 "NEGOTIATE_UNIX_FD\r\n"))
1676 return FALSE;
1677
1678 goto_state (auth, &client_state_waiting_for_agree_unix_fd);
1679 return TRUE;
1680 }
1681
1682 static dbus_bool_t
1683 send_agree_unix_fd (DBusAuth *auth)
1684 {
1685 _dbus_assert(auth->unix_fd_possible);
1686
1687 auth->unix_fd_negotiated = TRUE;
1688 _dbus_verbose("Agreed to UNIX FD passing\n");
1689
1690 if (!_dbus_string_append (&auth->outgoing,
1691 "AGREE_UNIX_FD\r\n"))
1692 return FALSE;
1693
1694 goto_state (auth, &server_state_waiting_for_begin);
1695 return TRUE;
1696 }
1697
1698 static dbus_bool_t
1699 handle_auth (DBusAuth *auth, const DBusString *args)
1700 {
1701 if (_dbus_string_get_length (args) == 0)
1702 {
1703 /* No args to the auth, send mechanisms */
1704 if (!send_rejected (auth))
1705 return FALSE;
1706
1707 return TRUE;
1708 }
1709 else
1710 {
1711 int i;
1712 DBusString mech;
1713 DBusString hex_response;
1714
1715 _dbus_string_find_blank (args, 0, &i);
1716
1717 if (!_dbus_string_init (&mech))
1718 return FALSE;
1719
1720 if (!_dbus_string_init (&hex_response))
1721 {
1722 _dbus_string_free (&mech);
1723 return FALSE;
1724 }
1725
1726 if (!_dbus_string_copy_len (args, 0, i, &mech, 0))
1727 goto failed;
1728
1729 _dbus_string_skip_blank (args, i, &i);
1730 if (!_dbus_string_copy (args, i, &hex_response, 0))
1731 goto failed;
1732
1733 auth->mech = find_mech (&mech, auth->allowed_mechs);
1734 if (auth->mech != NULL)
1735 {
1736 _dbus_verbose ("%s: Trying mechanism %s\n",
1737 DBUS_AUTH_NAME (auth),
1738 auth->mech->mechanism);
1739
1740 if (!process_data (auth, &hex_response,
1741 auth->mech->server_data_func))
1742 goto failed;
1743 }
1744 else
1745 {
1746 /* Unsupported mechanism */
1747 _dbus_verbose ("%s: Unsupported mechanism %s\n",
1748 DBUS_AUTH_NAME (auth),
1749 _dbus_string_get_const_data (&mech));
1750
1751 if (!send_rejected (auth))
1752 goto failed;
1753 }
1754
1755 _dbus_string_free (&mech);
1756 _dbus_string_free (&hex_response);
1757
1758 return TRUE;
1759
1760 failed:
1761 auth->mech = NULL;
1762 _dbus_string_free (&mech);
1763 _dbus_string_free (&hex_response);
1764 return FALSE;
1765 }
1766 }
1767
1768 static dbus_bool_t
1769 handle_server_state_waiting_for_auth (DBusAuth *auth,
1770 DBusAuthCommand command,
1771 const DBusString *args)
1772 {
1773 switch (command)
1774 {
1775 case DBUS_AUTH_COMMAND_AUTH:
1776 return handle_auth (auth, args);
1777
1778 case DBUS_AUTH_COMMAND_CANCEL:
1779 case DBUS_AUTH_COMMAND_DATA:
1780 return send_error (auth, "Not currently in an auth conversation");
1781
1782 case DBUS_AUTH_COMMAND_BEGIN:
1783 goto_state (auth, &common_state_need_disconnect);
1784 return TRUE;
1785
1786 case DBUS_AUTH_COMMAND_ERROR:
1787 return send_rejected (auth);
1788
1789 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1790 return send_error (auth, "Need to authenticate first");
1791
1792 case DBUS_AUTH_COMMAND_REJECTED:
1793 case DBUS_AUTH_COMMAND_OK:
1794 case DBUS_AUTH_COMMAND_UNKNOWN:
1795 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1796 default:
1797 return send_error (auth, "Unknown command");
1798 }
1799 }
1800
1801 static dbus_bool_t
1802 handle_server_state_waiting_for_data (DBusAuth *auth,
1803 DBusAuthCommand command,
1804 const DBusString *args)
1805 {
1806 switch (command)
1807 {
1808 case DBUS_AUTH_COMMAND_AUTH:
1809 return send_error (auth, "Sent AUTH while another AUTH in progress");
1810
1811 case DBUS_AUTH_COMMAND_CANCEL:
1812 case DBUS_AUTH_COMMAND_ERROR:
1813 return send_rejected (auth);
1814
1815 case DBUS_AUTH_COMMAND_DATA:
1816 return process_data (auth, args, auth->mech->server_data_func);
1817
1818 case DBUS_AUTH_COMMAND_BEGIN:
1819 goto_state (auth, &common_state_need_disconnect);
1820 return TRUE;
1821
1822 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1823 return send_error (auth, "Need to authenticate first");
1824
1825 case DBUS_AUTH_COMMAND_REJECTED:
1826 case DBUS_AUTH_COMMAND_OK:
1827 case DBUS_AUTH_COMMAND_UNKNOWN:
1828 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1829 default:
1830 return send_error (auth, "Unknown command");
1831 }
1832 }
1833
1834 static dbus_bool_t
1835 handle_server_state_waiting_for_begin (DBusAuth *auth,
1836 DBusAuthCommand command,
1837 const DBusString *args)
1838 {
1839 switch (command)
1840 {
1841 case DBUS_AUTH_COMMAND_AUTH:
1842 return send_error (auth, "Sent AUTH while expecting BEGIN");
1843
1844 case DBUS_AUTH_COMMAND_DATA:
1845 return send_error (auth, "Sent DATA while expecting BEGIN");
1846
1847 case DBUS_AUTH_COMMAND_BEGIN:
1848 goto_state (auth, &common_state_authenticated);
1849 return TRUE;
1850
1851 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1852 if (auth->unix_fd_possible)
1853 return send_agree_unix_fd(auth);
1854 else
1855 return send_error(auth, "Unix FD passing not supported, not authenticated or otherwise not possible");
1856
1857 case DBUS_AUTH_COMMAND_REJECTED:
1858 case DBUS_AUTH_COMMAND_OK:
1859 case DBUS_AUTH_COMMAND_UNKNOWN:
1860 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1861 default:
1862 return send_error (auth, "Unknown command");
1863
1864 case DBUS_AUTH_COMMAND_CANCEL:
1865 case DBUS_AUTH_COMMAND_ERROR:
1866 return send_rejected (auth);
1867 }
1868 }
1869
1870 /* return FALSE if no memory, TRUE if all OK */
1871 static dbus_bool_t
1872 get_word (const DBusString *str,
1873 int *start,
1874 DBusString *word)
1875 {
1876 int i;
1877
1878 _dbus_string_skip_blank (str, *start, start);
1879 _dbus_string_find_blank (str, *start, &i);
1880
1881 if (i > *start)
1882 {
1883 if (!_dbus_string_copy_len (str, *start, i - *start, word, 0))
1884 return FALSE;
1885
1886 *start = i;
1887 }
1888
1889 return TRUE;
1890 }
1891
1892 static dbus_bool_t
1893 record_mechanisms (DBusAuth *auth,
1894 const DBusString *args)
1895 {
1896 int next;
1897 int len;
1898
1899 if (auth->already_got_mechanisms)
1900 return TRUE;
1901
1902 len = _dbus_string_get_length (args);
1903
1904 next = 0;
1905 while (next < len)
1906 {
1907 DBusString m;
1908 const DBusAuthMechanismHandler *mech;
1909
1910 if (!_dbus_string_init (&m))
1911 goto nomem;
1912
1913 if (!get_word (args, &next, &m))
1914 {
1915 _dbus_string_free (&m);
1916 goto nomem;
1917 }
1918
1919 mech = find_mech (&m, auth->allowed_mechs);
1920
1921 if (mech != NULL)
1922 {
1923 /* FIXME right now we try mechanisms in the order
1924 * the server lists them; should we do them in
1925 * some more deterministic order?
1926 *
1927 * Probably in all_mechanisms order, our order of
1928 * preference. Of course when the server is us,
1929 * it lists things in that order anyhow.
1930 */
1931
1932 if (mech != &all_mechanisms[0])
1933 {
1934 _dbus_verbose ("%s: Adding mechanism %s to list we will try\n",
1935 DBUS_AUTH_NAME (auth), mech->mechanism);
1936
1937 if (!_dbus_list_append (& DBUS_AUTH_CLIENT (auth)->mechs_to_try,
1938 (void*) mech))
1939 {
1940 _dbus_string_free (&m);
1941 goto nomem;
1942 }
1943 }
1944 else
1945 {
1946 _dbus_verbose ("%s: Already tried mechanism %s; not adding to list we will try\n",
1947 DBUS_AUTH_NAME (auth), mech->mechanism);
1948 }
1949 }
1950 else
1951 {
1952 _dbus_verbose ("%s: Server offered mechanism \"%s\" that we don't know how to use\n",
1953 DBUS_AUTH_NAME (auth),
1954 _dbus_string_get_const_data (&m));
1955 }
1956
1957 _dbus_string_free (&m);
1958 }
1959
1960 auth->already_got_mechanisms = TRUE;
1961
1962 return TRUE;
1963
1964 nomem:
1965 _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
1966
1967 return FALSE;
1968 }
1969
1970 static dbus_bool_t
1971 process_rejected (DBusAuth *auth, const DBusString *args)
1972 {
1973 const DBusAuthMechanismHandler *mech;
1974 DBusAuthClient *client;
1975
1976 client = DBUS_AUTH_CLIENT (auth);
1977
1978 if (!auth->already_got_mechanisms)
1979 {
1980 if (!record_mechanisms (auth, args))
1981 return FALSE;
1982 }
1983
1984 if (DBUS_AUTH_CLIENT (auth)->mechs_to_try != NULL)
1985 {
1986 mech = client->mechs_to_try->data;
1987
1988 if (!send_auth (auth, mech))
1989 return FALSE;
1990
1991 _dbus_list_pop_first (&client->mechs_to_try);
1992
1993 _dbus_verbose ("%s: Trying mechanism %s\n",
1994 DBUS_AUTH_NAME (auth),
1995 mech->mechanism);
1996 }
1997 else
1998 {
1999 /* Give up */
2000 _dbus_verbose ("%s: Disconnecting because we are out of mechanisms to try using\n",
2001 DBUS_AUTH_NAME (auth));
2002 goto_state (auth, &common_state_need_disconnect);
2003 }
2004
2005 return TRUE;
2006 }
2007
2008
2009 static dbus_bool_t
2010 handle_client_state_waiting_for_data (DBusAuth *auth,
2011 DBusAuthCommand command,
2012 const DBusString *args)
2013 {
2014 _dbus_assert (auth->mech != NULL);
2015
2016 switch (command)
2017 {
2018 case DBUS_AUTH_COMMAND_DATA:
2019 return process_data (auth, args, auth->mech->client_data_func);
2020
2021 case DBUS_AUTH_COMMAND_REJECTED:
2022 return process_rejected (auth, args);
2023
2024 case DBUS_AUTH_COMMAND_OK:
2025 return process_ok(auth, args);
2026
2027 case DBUS_AUTH_COMMAND_ERROR:
2028 return send_cancel (auth);
2029
2030 case DBUS_AUTH_COMMAND_AUTH:
2031 case DBUS_AUTH_COMMAND_CANCEL:
2032 case DBUS_AUTH_COMMAND_BEGIN:
2033 case DBUS_AUTH_COMMAND_UNKNOWN:
2034 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2035 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2036 default:
2037 return send_error (auth, "Unknown command");
2038 }
2039 }
2040
2041 static dbus_bool_t
2042 handle_client_state_waiting_for_ok (DBusAuth *auth,
2043 DBusAuthCommand command,
2044 const DBusString *args)
2045 {
2046 switch (command)
2047 {
2048 case DBUS_AUTH_COMMAND_REJECTED:
2049 return process_rejected (auth, args);
2050
2051 case DBUS_AUTH_COMMAND_OK:
2052 return process_ok(auth, args);
2053
2054 case DBUS_AUTH_COMMAND_DATA:
2055 case DBUS_AUTH_COMMAND_ERROR:
2056 return send_cancel (auth);
2057
2058 case DBUS_AUTH_COMMAND_AUTH:
2059 case DBUS_AUTH_COMMAND_CANCEL:
2060 case DBUS_AUTH_COMMAND_BEGIN:
2061 case DBUS_AUTH_COMMAND_UNKNOWN:
2062 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2063 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2064 default:
2065 return send_error (auth, "Unknown command");
2066 }
2067 }
2068
2069 static dbus_bool_t
2070 handle_client_state_waiting_for_reject (DBusAuth *auth,
2071 DBusAuthCommand command,
2072 const DBusString *args)
2073 {
2074 switch (command)
2075 {
2076 case DBUS_AUTH_COMMAND_REJECTED:
2077 return process_rejected (auth, args);
2078
2079 case DBUS_AUTH_COMMAND_AUTH:
2080 case DBUS_AUTH_COMMAND_CANCEL:
2081 case DBUS_AUTH_COMMAND_DATA:
2082 case DBUS_AUTH_COMMAND_BEGIN:
2083 case DBUS_AUTH_COMMAND_OK:
2084 case DBUS_AUTH_COMMAND_ERROR:
2085 case DBUS_AUTH_COMMAND_UNKNOWN:
2086 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2087 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2088 default:
2089 goto_state (auth, &common_state_need_disconnect);
2090 return TRUE;
2091 }
2092 }
2093
2094 static dbus_bool_t
2095 handle_client_state_waiting_for_agree_unix_fd(DBusAuth *auth,
2096 DBusAuthCommand command,
2097 const DBusString *args)
2098 {
2099 switch (command)
2100 {
2101 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2102 _dbus_assert(auth->unix_fd_possible);
2103 auth->unix_fd_negotiated = TRUE;
2104 _dbus_verbose("Successfully negotiated UNIX FD passing\n");
2105 return send_begin (auth);
2106
2107 case DBUS_AUTH_COMMAND_ERROR:
2108 _dbus_assert(auth->unix_fd_possible);
2109 auth->unix_fd_negotiated = FALSE;
2110 _dbus_verbose("Failed to negotiate UNIX FD passing\n");
2111 return send_begin (auth);
2112
2113 case DBUS_AUTH_COMMAND_OK:
2114 case DBUS_AUTH_COMMAND_DATA:
2115 case DBUS_AUTH_COMMAND_REJECTED:
2116 case DBUS_AUTH_COMMAND_AUTH:
2117 case DBUS_AUTH_COMMAND_CANCEL:
2118 case DBUS_AUTH_COMMAND_BEGIN:
2119 case DBUS_AUTH_COMMAND_UNKNOWN:
2120 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2121 default:
2122 return send_error (auth, "Unknown command");
2123 }
2124 }
2125
2129 typedef struct {
2130 const char *name;
2131 DBusAuthCommand command;
2132 } DBusAuthCommandName;
2133
2134 static const DBusAuthCommandName auth_command_names[] = {
2135 { "AUTH", DBUS_AUTH_COMMAND_AUTH },
2136 { "CANCEL", DBUS_AUTH_COMMAND_CANCEL },
2137 { "DATA", DBUS_AUTH_COMMAND_DATA },
2138 { "BEGIN", DBUS_AUTH_COMMAND_BEGIN },
2139 { "REJECTED", DBUS_AUTH_COMMAND_REJECTED },
2140 { "OK", DBUS_AUTH_COMMAND_OK },
2141 { "ERROR", DBUS_AUTH_COMMAND_ERROR },
2142 { "NEGOTIATE_UNIX_FD", DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD },
2143 { "AGREE_UNIX_FD", DBUS_AUTH_COMMAND_AGREE_UNIX_FD }
2144 };
2145
2146 static DBusAuthCommand
2147 lookup_command_from_name (DBusString *command)
2148 {
2149 int i;
2150
2151 for (i = 0; i < _DBUS_N_ELEMENTS (auth_command_names); i++)
2152 {
2153 if (_dbus_string_equal_c_str (command,
2154 auth_command_names[i].name))
2155 return auth_command_names[i].command;
2156 }
2157
2158 return DBUS_AUTH_COMMAND_UNKNOWN;
2159 }
2160
2161 static void
2162 goto_state (DBusAuth *auth,
2163 const DBusAuthStateData *state)
2164 {
2165 _dbus_verbose ("%s: going from state %s to state %s\n",
2166 DBUS_AUTH_NAME (auth),
2167 auth->state->name,
2168 state->name);
2169
2170 auth->state = state;
2171 }
2172
2173 /* returns whether to call it again right away */
2174 static dbus_bool_t
2175 process_command (DBusAuth *auth)
2176 {
2177 DBusAuthCommand command;
2178 DBusString line;
2179 DBusString args;
2180 int eol;
2181 int i, j;
2182 dbus_bool_t retval;
2183
2184 /* _dbus_verbose ("%s: trying process_command()\n"); */
2185
2186 retval = FALSE;
2187
2188 eol = 0;
2189 if (!_dbus_string_find (&auth->incoming, 0, "\r\n", &eol))
2190 return FALSE;
2191
2192 if (!_dbus_string_init (&line))
2193 {
2194 auth->needed_memory = TRUE;
2195 return FALSE;
2196 }
2197
2198 if (!_dbus_string_init (&args))
2199 {
2200 _dbus_string_free (&line);
2201 auth->needed_memory = TRUE;
2202 return FALSE;
2203 }
2204
2205 if (!_dbus_string_copy_len (&auth->incoming, 0, eol, &line, 0))
2206 goto out;
2207
2208 if (!_dbus_string_validate_ascii (&line, 0,
2209 _dbus_string_get_length (&line)))
2210 {
2211 _dbus_verbose ("%s: Command contained non-ASCII chars or embedded nul\n",
2212 DBUS_AUTH_NAME (auth));
2213 if (!send_error (auth, "Command contained non-ASCII"))
2214 goto out;
2215 else
2216 goto next_command;
2217 }
2218
2219 _dbus_verbose ("%s: got command \"%s\"\n",
2220 DBUS_AUTH_NAME (auth),
2221 _dbus_string_get_const_data (&line));
2222
2223 _dbus_string_find_blank (&line, 0, &i);
2224 _dbus_string_skip_blank (&line, i, &j);
2225
2226 if (j > i)
2227 _dbus_string_delete (&line, i, j - i);
2228
2229 if (!_dbus_string_move (&line, i, &args, 0))
2230 goto out;
2231
2232 /* FIXME 1.0 we should probably validate that only the allowed
2233 * chars are in the command name
2234 */
2235
2236 command = lookup_command_from_name (&line);
2237 if (!(* auth->state->handler) (auth, command, &args))
2238 goto out;
2239
2240 next_command:
2241
2242 /* We've succeeded in processing the whole command so drop it out
2243 * of the incoming buffer and return TRUE to try another command.
2244 */
2245
2246 _dbus_string_delete (&auth->incoming, 0, eol);
2247
2248 /* kill the \r\n */
2249 _dbus_string_delete (&auth->incoming, 0, 2);
2250
2251 retval = TRUE;
2252
2253 out:
2254 _dbus_string_free (&args);
2255 _dbus_string_free (&line);
2256
2257 if (!retval)
2258 auth->needed_memory = TRUE;
2259 else
2260 auth->needed_memory = FALSE;
2261
2262 return retval;
2263 }
2264
2265
2280 DBusAuth*
2281 _dbus_auth_server_new (const DBusString *guid)
2282 {
2283 DBusAuth *auth;
2284 DBusAuthServer *server_auth;
2285 DBusString guid_copy;
2286
2287 if (!_dbus_string_init (&guid_copy))
2288 return NULL;
2289
2290 if (!_dbus_string_copy (guid, 0, &guid_copy, 0))
2291 {
2292 _dbus_string_free (&guid_copy);
2293 return NULL;
2294 }
2295
2296 auth = _dbus_auth_new (sizeof (DBusAuthServer));
2297 if (auth == NULL)
2298 {
2299 _dbus_string_free (&guid_copy);
2300 return NULL;
2301 }
2302
2303 auth->side = auth_side_server;
2304 auth->state = &server_state_waiting_for_auth;
2305
2306 server_auth = DBUS_AUTH_SERVER (auth);
2307
2308 server_auth->guid = guid_copy;
2309
2310 /* perhaps this should be per-mechanism with a lower
2311 * max
2312 */
2313 server_auth->failures = 0;
2314 server_auth->max_failures = 6;
2315
2316 return auth;
2317 }
2318
2326 DBusAuth*
2327 _dbus_auth_client_new (void)
2328 {
2329 DBusAuth *auth;
2330 DBusString guid_str;
2331
2332 if (!_dbus_string_init (&guid_str))
2333 return NULL;
2334
2335 auth = _dbus_auth_new (sizeof (DBusAuthClient));
2336 if (auth == NULL)
2337 {
2338 _dbus_string_free (&guid_str);
2339 return NULL;
2340 }
2341
2342 DBUS_AUTH_CLIENT (auth)->guid_from_server = guid_str;
2343
2344 auth->side = auth_side_client;
2345 auth->state = &client_state_need_send_auth;
2346
2347 /* Start the auth conversation by sending AUTH for our default
2348 * mechanism */
2349 if (!send_auth (auth, &all_mechanisms[0]))
2350 {
2351 _dbus_auth_unref (auth);
2352 return NULL;
2353 }
2354
2355 return auth;
2356 }
2357
2364 DBusAuth *
2365 _dbus_auth_ref (DBusAuth *auth)
2366 {
2367 _dbus_assert (auth != NULL);
2368
2369 auth->refcount += 1;
2370
2371 return auth;
2372 }
2373
2379 void
2380 _dbus_auth_unref (DBusAuth *auth)
2381 {
2382 _dbus_assert (auth != NULL);
2383 _dbus_assert (auth->refcount > 0);
2384
2385 auth->refcount -= 1;
2386 if (auth->refcount == 0)
2387 {
2388 shutdown_mech (auth);
2389
2390 if (DBUS_AUTH_IS_CLIENT (auth))
2391 {
2392 _dbus_string_free (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
2393 _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
2394 }
2395 else
2396 {
2397 _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
2398
2399 _dbus_string_free (& DBUS_AUTH_SERVER (auth)->guid);
2400 }
2401
2402 if (auth->keyring)
2403 _dbus_keyring_unref (auth->keyring);
2404
2405 _dbus_string_free (&auth->context);
2406 _dbus_string_free (&auth->challenge);
2407 _dbus_string_free (&auth->identity);
2408 _dbus_string_free (&auth->incoming);
2409 _dbus_string_free (&auth->outgoing);
2410
2411 dbus_free_string_array (auth->allowed_mechs);
2412
2413 _dbus_credentials_unref (auth->credentials);
2414 _dbus_credentials_unref (auth->authorized_identity);
2415 _dbus_credentials_unref (auth->desired_identity);
2416
2417 dbus_free (auth);
2418 }
2419 }
2420
2429 dbus_bool_t
2430 _dbus_auth_set_mechanisms (DBusAuth *auth,
2431 const char **mechanisms)
2432 {
2433 char **copy;
2434
2435 if (mechanisms != NULL)
2436 {
2437 copy = _dbus_dup_string_array (mechanisms);
2438 if (copy == NULL)
2439 return FALSE;
2440 }
2441 else
2442 copy = NULL;
2443
2444 dbus_free_string_array (auth->allowed_mechs);
2445
2446 auth->allowed_mechs = copy;
2447
2448 return TRUE;
2449 }
2450
2455 #define DBUS_AUTH_IN_END_STATE(auth) ((auth)->state->handler == NULL)
2456
2464 DBusAuthState
2465 _dbus_auth_do_work (DBusAuth *auth)
2466 {
2467 auth->needed_memory = FALSE;
2468
2469 /* Max amount we'll buffer up before deciding someone's on crack */
2470 #define MAX_BUFFER (16 * _DBUS_ONE_KILOBYTE)
2471
2472 do
2473 {
2474 if (DBUS_AUTH_IN_END_STATE (auth))
2475 break;
2476
2477 if (_dbus_string_get_length (&auth->incoming) > MAX_BUFFER ||
2478 _dbus_string_get_length (&auth->outgoing) > MAX_BUFFER)
2479 {
2480 goto_state (auth, &common_state_need_disconnect);
2481 _dbus_verbose ("%s: Disconnecting due to excessive data buffered in auth phase\n",
2482 DBUS_AUTH_NAME (auth));
2483 break;
2484 }
2485 }
2486 while (process_command (auth));
2487
2488 if (auth->needed_memory)
2489 return DBUS_AUTH_STATE_WAITING_FOR_MEMORY;
2490 else if (_dbus_string_get_length (&auth->outgoing) > 0)
2491 return DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND;
2492 else if (auth->state == &common_state_need_disconnect)
2493 return DBUS_AUTH_STATE_NEED_DISCONNECT;
2494 else if (auth->state == &common_state_authenticated)
2495 return DBUS_AUTH_STATE_AUTHENTICATED;
2496 else return DBUS_AUTH_STATE_WAITING_FOR_INPUT;
2497 }
2498
2508 dbus_bool_t
2509 _dbus_auth_get_bytes_to_send (DBusAuth *auth,
2510 const DBusString **str)
2511 {
2512 _dbus_assert (auth != NULL);
2513 _dbus_assert (str != NULL);
2514
2515 *str = NULL;
2516
2517 if (_dbus_string_get_length (&auth->outgoing) == 0)
2518 return FALSE;
2519
2520 *str = &auth->outgoing;
2521
2522 return TRUE;
2523 }
2524
2533 void
2534 _dbus_auth_bytes_sent (DBusAuth *auth,
2535 int bytes_sent)
2536 {
2537 _dbus_verbose ("%s: Sent %d bytes of: %s\n",
2538 DBUS_AUTH_NAME (auth),
2539 bytes_sent,
2540 _dbus_string_get_const_data (&auth->outgoing));
2541
2542 _dbus_string_delete (&auth->outgoing,
2543 0, bytes_sent);
2544 }
2545
2553 void
2554 _dbus_auth_get_buffer (DBusAuth *auth,
2555 DBusString **buffer)
2556 {
2557 _dbus_assert (auth != NULL);
2558 _dbus_assert (!auth->buffer_outstanding);
2559
2560 *buffer = &auth->incoming;
2561
2562 auth->buffer_outstanding = TRUE;
2563 }
2564
2571 void
2572 _dbus_auth_return_buffer (DBusAuth *auth,
2573 DBusString *buffer)
2574 {
2575 _dbus_assert (buffer == &auth->incoming);
2576 _dbus_assert (auth->buffer_outstanding);
2577
2578 auth->buffer_outstanding = FALSE;
2579 }
2580
2590 void
2591 _dbus_auth_get_unused_bytes (DBusAuth *auth,
2592 const DBusString **str)
2593 {
2594 if (!DBUS_AUTH_IN_END_STATE (auth))
2595 return;
2596
2597 *str = &auth->incoming;
2598 }
2599
2600
2607 void
2608 _dbus_auth_delete_unused_bytes (DBusAuth *auth)
2609 {
2610 if (!DBUS_AUTH_IN_END_STATE (auth))
2611 return;
2612
2613 _dbus_string_set_length (&auth->incoming, 0);
2614 }
2615
2624 dbus_bool_t
2625 _dbus_auth_needs_encoding (DBusAuth *auth)
2626 {
2627 if (auth->state != &common_state_authenticated)
2628 return FALSE;
2629
2630 if (auth->mech != NULL)
2631 {
2632 if (DBUS_AUTH_IS_CLIENT (auth))
2633 return auth->mech->client_encode_func != NULL;
2634 else
2635 return auth->mech->server_encode_func != NULL;
2636 }
2637 else
2638 return FALSE;
2639 }
2640
2651 dbus_bool_t
2652 _dbus_auth_encode_data (DBusAuth *auth,
2653 const DBusString *plaintext,
2654 DBusString *encoded)
2655 {
2656 _dbus_assert (plaintext != encoded);
2657
2658 if (auth->state != &common_state_authenticated)
2659 return FALSE;
2660
2661 if (_dbus_auth_needs_encoding (auth))
2662 {
2663 if (DBUS_AUTH_IS_CLIENT (auth))
2664 return (* auth->mech->client_encode_func) (auth, plaintext, encoded);
2665 else
2666 return (* auth->mech->server_encode_func) (auth, plaintext, encoded);
2667 }
2668 else
2669 {
2670 return _dbus_string_copy (plaintext, 0, encoded,
2671 _dbus_string_get_length (encoded));
2672 }
2673 }
2674
2683 dbus_bool_t
2684 _dbus_auth_needs_decoding (DBusAuth *auth)
2685 {
2686 if (auth->state != &common_state_authenticated)
2687 return FALSE;
2688
2689 if (auth->mech != NULL)
2690 {
2691 if (DBUS_AUTH_IS_CLIENT (auth))
2692 return auth->mech->client_decode_func != NULL;
2693 else
2694 return auth->mech->server_decode_func != NULL;
2695 }
2696 else
2697 return FALSE;
2698 }
2699
2700
2714 dbus_bool_t
2715 _dbus_auth_decode_data (DBusAuth *auth,
2716 const DBusString *encoded,
2717 DBusString *plaintext)
2718 {
2719 _dbus_assert (plaintext != encoded);
2720
2721 if (auth->state != &common_state_authenticated)
2722 return FALSE;
2723
2724 if (_dbus_auth_needs_decoding (auth))
2725 {
2726 if (DBUS_AUTH_IS_CLIENT (auth))
2727 return (* auth->mech->client_decode_func) (auth, encoded, plaintext);
2728 else
2729 return (* auth->mech->server_decode_func) (auth, encoded, plaintext);
2730 }
2731 else
2732 {
2733 return _dbus_string_copy (encoded, 0, plaintext,
2734 _dbus_string_get_length (plaintext));
2735 }
2736 }
2737
2746 dbus_bool_t
2747 _dbus_auth_set_credentials (DBusAuth *auth,
2748 DBusCredentials *credentials)
2749 {
2750 _dbus_credentials_clear (auth->credentials);
2751 return _dbus_credentials_add_credentials (auth->credentials,
2752 credentials);
2753 }
2754
2764 DBusCredentials*
2765 _dbus_auth_get_identity (DBusAuth *auth)
2766 {
2767 if (auth->state == &common_state_authenticated)
2768 {
2769 return auth->authorized_identity;
2770 }
2771 else
2772 {
2773 /* FIXME instead of this, keep an empty credential around that
2774 * doesn't require allocation or something
2775 */
2776 /* return empty credentials */
2777 _dbus_assert (_dbus_credentials_are_empty (auth->authorized_identity));
2778 return auth->authorized_identity;
2779 }
2780 }
2781
2788 const char*
2789 _dbus_auth_get_guid_from_server (DBusAuth *auth)
2790 {
2791 _dbus_assert (DBUS_AUTH_IS_CLIENT (auth));
2792
2793 if (auth->state == &common_state_authenticated)
2794 return _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
2795 else
2796 return NULL;
2797 }
2798
2807 dbus_bool_t
2808 _dbus_auth_set_context (DBusAuth *auth,
2809 const DBusString *context)
2810 {
2811 return _dbus_string_replace_len (context, 0, _dbus_string_get_length (context),
2812 &auth->context, 0, _dbus_string_get_length (context));
2813 }
2814
2822 void
2823 _dbus_auth_set_unix_fd_possible(DBusAuth *auth, dbus_bool_t b)
2824 {
2825 auth->unix_fd_possible = b;
2826 }
2827
2834 dbus_bool_t
2835 _dbus_auth_get_unix_fd_negotiated(DBusAuth *auth)
2836 {
2837 return auth->unix_fd_negotiated;
2838 }
2839
2842 /* tests in dbus-auth-util.c */
dbus_error_has_name
dbus_bool_t dbus_error_has_name(const DBusError *error, const char *name)
Checks whether the error is set and has the given name.
Definition: dbus-errors.c:302
_dbus_string_append
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:935
_dbus_string_parse_int
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_parse_int(const DBusString *str, int start, long *value_return, int *end_return)
Parses an integer contained in a DBusString.
Definition: dbus-sysdeps.c:435
DBusError::message
const char * message
public error message field
Definition: dbus-errors.h:51
_dbus_auth_delete_unused_bytes
void _dbus_auth_delete_unused_bytes(DBusAuth *auth)
Gets rid of unused bytes returned by _dbus_auth_get_unused_bytes() after we&#39;ve gotten them and succes...
Definition: dbus-auth.c:2608
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
DBusCredentials
Definition: dbus-credentials.c:48
_dbus_auth_get_unused_bytes
void _dbus_auth_get_unused_bytes(DBusAuth *auth, const DBusString **str)
Returns leftover bytes that were not used as part of the auth conversation.
Definition: dbus-auth.c:2591
_dbus_keyring_unref
void _dbus_keyring_unref(DBusKeyring *keyring)
Decrements refcount and finalizes if it reaches zero.
Definition: dbus-keyring.c:677
_dbus_string_equal
dbus_bool_t _dbus_string_equal(const DBusString *a, const DBusString *b)
Tests two DBusString for equality.
Definition: dbus-string.c:2013
DBusAuthMechanismHandler::client_decode_func
DBusAuthDecodeFunction client_decode_func
Function on client side for decode.
Definition: dbus-auth.c:112
DBusAuthMechanismHandler::server_encode_func
DBusAuthEncodeFunction server_encode_func
Function on server side to encode.
Definition: dbus-auth.c:106
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:701
_dbus_credentials_add_credential
dbus_bool_t _dbus_credentials_add_credential(DBusCredentials *credentials, DBusCredentialType which, DBusCredentials *other_credentials)
Merge the given credential found in the second object into the first object, overwriting the first ob...
Definition: dbus-credentials.c:458
DBusAuthCommand
DBusAuthCommand
Enumeration for the known authentication commands.
Definition: dbus-auth.c:119
_dbus_auth_needs_decoding
dbus_bool_t _dbus_auth_needs_decoding(DBusAuth *auth)
Called post-authentication, indicates whether we need to decode the message stream with _dbus_auth_de...
Definition: dbus-auth.c:2684
_dbus_string_hex_encode
dbus_bool_t _dbus_string_hex_encode(const DBusString *source, int start, DBusString *dest, int insert_at)
Encodes a string in hex, the way MD5 and SHA-1 are usually encoded.
Definition: dbus-string.c:2259
DBusAuth::buffer_outstanding
unsigned int buffer_outstanding
Buffer is "checked out" for reading data into.
Definition: dbus-auth.c:190
DBusAuthClient::mechs_to_try
DBusList * mechs_to_try
Mechanisms we got from the server that we&#39;re going to try using.
Definition: dbus-auth.c:203
_dbus_string_append_int
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_int(DBusString *str, long value)
Appends an integer to a DBusString.
Definition: dbus-sysdeps.c:354
_dbus_credentials_are_superset
dbus_bool_t _dbus_credentials_are_superset(DBusCredentials *credentials, DBusCredentials *possible_subset)
Checks whether the first credentials object contains all the credentials found in the second credenti...
Definition: dbus-credentials.c:363
_dbus_auth_encode_data
dbus_bool_t _dbus_auth_encode_data(DBusAuth *auth, const DBusString *plaintext, DBusString *encoded)
Called post-authentication, encodes a block of bytes for sending to the peer.
Definition: dbus-auth.c:2652
DBusKeyring
Internals of DBusKeyring.
Definition: dbus-keyring.c:111
_dbus_auth_set_context
dbus_bool_t _dbus_auth_set_context(DBusAuth *auth, const DBusString *context)
Sets the "authentication context" which scopes cookies with the DBUS_COOKIE_SHA1 auth mechanism for e...
Definition: dbus-auth.c:2808
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition: dbus-internals.h:148
DBUS_ERROR_INIT
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
Definition: dbus-errors.h:62
DBusList::data
void * data
Data stored at this element.
Definition: dbus-list.h:38
_dbus_auth_return_buffer
void _dbus_auth_return_buffer(DBusAuth *auth, DBusString *buffer)
Returns a buffer with new data read into it.
Definition: dbus-auth.c:2572
_dbus_auth_do_work
DBusAuthState _dbus_auth_do_work(DBusAuth *auth)
Analyzes buffered input and moves the auth conversation forward, returning the new state of the auth ...
Definition: dbus-auth.c:2465
dbus_error_free
void dbus_error_free(DBusError *error)
Frees an error that&#39;s been set (or just initialized), then reinitializes the error as in dbus_error_i...
Definition: dbus-errors.c:211
DBusAuthMechanismHandler::mechanism
const char * mechanism
Name of the mechanism.
Definition: dbus-auth.c:104
DBusAuth::unix_fd_negotiated
unsigned int unix_fd_negotiated
Unix fd was successfully negotiated.
Definition: dbus-auth.c:193
_dbus_keyring_get_hex_key
dbus_bool_t _dbus_keyring_get_hex_key(DBusKeyring *keyring, int key_id, DBusString *hex_key)
Gets the hex-encoded secret key for the given ID.
Definition: dbus-keyring.c:1003
_dbus_auth_set_mechanisms
dbus_bool_t _dbus_auth_set_mechanisms(DBusAuth *auth, const char **mechanisms)
Sets an array of authentication mechanism names that we are willing to use.
Definition: dbus-auth.c:2430
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
DBusAuthMechanismHandler::server_shutdown_func
DBusAuthShutdownFunction server_shutdown_func
Function on server side to shut down.
Definition: dbus-auth.c:108
_dbus_string_copy
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that&#39;s copied to the d...
Definition: dbus-string.c:1283
DBusAuth::keyring
DBusKeyring * keyring
Keyring for cookie mechanism.
Definition: dbus-auth.c:177
DBusAuth::context
DBusString context
Cookie scope.
Definition: dbus-auth.c:176
DBusAuthDataFunction
dbus_bool_t(* DBusAuthDataFunction)(DBusAuth *auth, const DBusString *data)
This function processes a block of data received from the peer.
Definition: dbus-auth.c:77
_dbus_auth_get_unix_fd_negotiated
dbus_bool_t _dbus_auth_get_unix_fd_negotiated(DBusAuth *auth)
Queries whether unix fd passing was successfully negotiated.
Definition: dbus-auth.c:2835
_dbus_credentials_clear
void _dbus_credentials_clear(DBusCredentials *credentials)
Clear all credentials in the object.
Definition: dbus-credentials.c:503
_dbus_string_find
dbus_bool_t _dbus_string_find(const DBusString *str, int start, const char *substr, int *found)
Finds the given substring in the string, returning TRUE and filling in the byte index where the subst...
Definition: dbus-string.c:1604
DBusAuthServer::guid
DBusString guid
Our globally unique ID in hex encoding.
Definition: dbus-auth.c:219
DBusAuth::side
const char * side
Client or server.
Definition: dbus-auth.c:156
_dbus_credentials_add_credentials
dbus_bool_t _dbus_credentials_add_credentials(DBusCredentials *credentials, DBusCredentials *other_credentials)
Merge all credentials found in the second object into the first object, overwriting the first object ...
Definition: dbus-credentials.c:424
DBusAuthClient::guid_from_server
DBusString guid_from_server
GUID received from server.
Definition: dbus-auth.c:205
_dbus_auth_get_identity
DBusCredentials * _dbus_auth_get_identity(DBusAuth *auth)
Gets the identity we authorized the client as.
Definition: dbus-auth.c:2765
_dbus_auth_get_buffer
void _dbus_auth_get_buffer(DBusAuth *auth, DBusString **buffer)
Get a buffer to be used for reading bytes from the peer we&#39;re conversing with.
Definition: dbus-auth.c:2554
DBusAuth::challenge
DBusString challenge
Challenge sent to client.
Definition: dbus-auth.c:179
_dbus_auth_decode_data
dbus_bool_t _dbus_auth_decode_data(DBusAuth *auth, const DBusString *encoded, DBusString *plaintext)
Called post-authentication, decodes a block of bytes received from the peer.
Definition: dbus-auth.c:2715
DBusAuth::authorized_identity
DBusCredentials * authorized_identity
Credentials that are authorized.
Definition: dbus-auth.c:172
DBusAuthMechanismHandler::server_decode_func
DBusAuthDecodeFunction server_decode_func
Function on server side to decode.
Definition: dbus-auth.c:107
_dbus_string_move
dbus_bool_t _dbus_string_move(DBusString *source, int start, DBusString *dest, int insert_at)
Moves the end of one string into another string.
Definition: dbus-string.c:1259
_dbus_append_user_from_current_process
dbus_bool_t _dbus_append_user_from_current_process(DBusString *str)
Append to the string the identity we would like to have when we authenticate, on UNIX this is the cur...
Definition: dbus-sysdeps-unix.c:2651
_dbus_credentials_are_anonymous
dbus_bool_t _dbus_credentials_are_anonymous(DBusCredentials *credentials)
Checks whether a credentials object contains a user identity.
Definition: dbus-credentials.c:408
_dbus_string_equal_c_str
dbus_bool_t _dbus_string_equal_c_str(const DBusString *a, const char *c_str)
Checks whether a string is equal to a C string.
Definition: dbus-string.c:2152
_dbus_auth_bytes_sent
void _dbus_auth_bytes_sent(DBusAuth *auth, int bytes_sent)
Notifies the auth conversation object that the given number of bytes of the outgoing buffer have been...
Definition: dbus-auth.c:2534
DBusString
Definition: dbus-string.h:42
DBusAuth
Internal members of DBusAuth.
Definition: dbus-auth.c:153
DBusAuthMechanismHandler::client_initial_response_func
DBusInitialResponseFunction client_initial_response_func
Function on client side to handle initial response.
Definition: dbus-auth.c:109
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
DBusAuthServer
"Subclass" of DBusAuth for server side.
Definition: dbus-auth.c:212
DBusAuthStateData::handler
DBusAuthStateFunction handler
State function for this state.
Definition: dbus-auth.c:147
DBusAuthMechanismHandler::client_data_func
DBusAuthDataFunction client_data_func
Function on client side for DATA.
Definition: dbus-auth.c:110
DBusAuth::state
const DBusAuthStateData * state
Current protocol state.
Definition: dbus-auth.c:161
_dbus_string_replace_len
dbus_bool_t _dbus_string_replace_len(const DBusString *source, int start, int len, DBusString *dest, int replace_at, int replace_len)
Replaces a segment of dest string with a segment of source string.
Definition: dbus-string.c:1404
DBusAuthClient
"Subclass" of DBusAuth for client side
Definition: dbus-auth.c:199
DBusAuth::desired_identity
DBusCredentials * desired_identity
Identity client has requested.
Definition: dbus-auth.c:174
_dbus_string_skip_blank
void _dbus_string_skip_blank(const DBusString *str, int start, int *end)
Skips blanks from start, storing the first non-blank in *end (blank is space or tab).
Definition: dbus-string.c:1803
_dbus_auth_server_new
DBusAuth * _dbus_auth_server_new(const DBusString *guid)
Creates a new auth conversation object for the server side.
Definition: dbus-auth.c:2281
DBusAuth::needed_memory
unsigned int needed_memory
We needed memory to continue since last successful getting something done.
Definition: dbus-auth.c:185
DBUS_AUTH_NAME
#define DBUS_AUTH_NAME(auth)
The name of the auth ("client" or "server")
Definition: dbus-auth.c:338
_dbus_auth_ref
DBusAuth * _dbus_auth_ref(DBusAuth *auth)
Increments the refcount of an auth object.
Definition: dbus-auth.c:2365
DBusAuth::already_asked_for_initial_response
unsigned int already_asked_for_initial_response
Already sent a blank challenge to get an initial response.
Definition: dbus-auth.c:189
_dbus_string_delete
void _dbus_string_delete(DBusString *str, int start, int len)
Deletes a segment of a DBusString with length len starting at start.
Definition: dbus-string.c:1193
DBusAuth::identity
DBusString identity
Current identity we&#39;re authorizing as.
Definition: dbus-auth.c:165
DBusInitialResponseFunction
dbus_bool_t(* DBusInitialResponseFunction)(DBusAuth *auth, DBusString *response)
This function appends an initial client response to the given string.
Definition: dbus-auth.c:70
_dbus_list_append
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:270
DBusAuth::already_got_mechanisms
unsigned int already_got_mechanisms
Client already got mech list.
Definition: dbus-auth.c:188
_dbus_string_append_printf
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
Definition: dbus-string.c:1114
_dbus_string_zero
void _dbus_string_zero(DBusString *str)
Clears all allocated bytes in the string to zero.
Definition: dbus-string.c:2685
DBusAuth::cookie_id
int cookie_id
ID of cookie to use.
Definition: dbus-auth.c:178
DBusAuthStateData
Information about a auth state.
Definition: dbus-auth.c:144
DBusError
Object representing an exception.
Definition: dbus-errors.h:48
DBusAuthStateFunction
dbus_bool_t(* DBusAuthStateFunction)(DBusAuth *auth, DBusAuthCommand command, const DBusString *args)
Auth state function, determines the reaction to incoming events for a particular state.
Definition: dbus-auth.c:137
_dbus_keyring_get_best_key
int _dbus_keyring_get_best_key(DBusKeyring *keyring, DBusError *error)
Gets a recent key to use for authentication.
Definition: dbus-keyring.c:945
_dbus_string_validate_utf8
dbus_bool_t _dbus_string_validate_utf8(const DBusString *str, int start, int len)
Checks that the given range of the string is valid UTF-8.
Definition: dbus-string.c:2555
DBusAuthClient::base
DBusAuth base
Parent class.
Definition: dbus-auth.c:201
DBusAuthMechanismHandler::client_shutdown_func
DBusAuthShutdownFunction client_shutdown_func
Function on client side for shutdown.
Definition: dbus-auth.c:113
_dbus_list_pop_first
void * _dbus_list_pop_first(DBusList **list)
Removes the first value in the list and returns it.
Definition: dbus-list.c:649
DBusAuth::refcount
int refcount
reference count
Definition: dbus-auth.c:155
_dbus_auth_get_guid_from_server
const char * _dbus_auth_get_guid_from_server(DBusAuth *auth)
Gets the GUID from the server if we&#39;ve authenticated; gets NULL otherwise.
Definition: dbus-auth.c:2789
_DBUS_N_ELEMENTS
#define _DBUS_N_ELEMENTS(array)
Computes the number of elements in a fixed-size array using sizeof().
Definition: dbus-internals.h:189
DBusAuth::allowed_mechs
char ** allowed_mechs
Mechanisms we&#39;re allowed to use, or NULL if we can use any.
Definition: dbus-auth.c:181
DBusAuthCommandName::name
const char * name
Name of the command.
Definition: dbus-auth.c:2130
DBusAuthDecodeFunction
dbus_bool_t(* DBusAuthDecodeFunction)(DBusAuth *auth, const DBusString *data, DBusString *decoded)
This function decodes a block of data from the peer.
Definition: dbus-auth.c:90
DBUS_AUTH_CLIENT
#define DBUS_AUTH_CLIENT(auth)
Definition: dbus-auth.c:326
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
_dbus_dup_string_array
char ** _dbus_dup_string_array(const char **array)
Duplicates a string array.
Definition: dbus-internals.c:588
TRUE
#define TRUE
Expands to "1".
DBusAuthServer::failures
int failures
Number of times client has been rejected.
Definition: dbus-auth.c:216
DBUS_AUTH_IS_SERVER
#define DBUS_AUTH_IS_SERVER(auth)
Definition: dbus-auth.c:316
DBusAuthShutdownFunction
void(* DBusAuthShutdownFunction)(DBusAuth *auth)
This function is called when the mechanism is abandoned.
Definition: dbus-auth.c:97
N_CHALLENGE_BYTES
#define N_CHALLENGE_BYTES
http://www.ietf.org/rfc/rfc2831.txt suggests at least 64 bits of entropy, we use 128.
Definition: dbus-auth.c:519
_dbus_string_find_blank
dbus_bool_t _dbus_string_find_blank(const DBusString *str, int start, int *found)
Finds a blank (space or tab) in the string.
Definition: dbus-string.c:1765
DBusAuth::incoming
DBusString incoming
Incoming data buffer.
Definition: dbus-auth.c:158
_dbus_auth_set_credentials
dbus_bool_t _dbus_auth_set_credentials(DBusAuth *auth, DBusCredentials *credentials)
Sets credentials received via reliable means from the operating system.
Definition: dbus-auth.c:2747
_dbus_keyring_is_for_credentials
dbus_bool_t _dbus_keyring_is_for_credentials(DBusKeyring *keyring, DBusCredentials *credentials)
Checks whether the keyring is for the same user as the given credentials.
Definition: dbus-keyring.c:984
_dbus_auth_set_unix_fd_possible
void _dbus_auth_set_unix_fd_possible(DBusAuth *auth, dbus_bool_t b)
Sets whether unix fd passing is potentially on the transport and hence shall be negotiated.
Definition: dbus-auth.c:2823
DBusAuthStateData::name
const char * name
Name of the state.
Definition: dbus-auth.c:146
DBusAuthMechanismHandler::client_encode_func
DBusAuthEncodeFunction client_encode_func
Function on client side for encode.
Definition: dbus-auth.c:111
_dbus_credentials_new
DBusCredentials * _dbus_credentials_new(void)
Creates a new credentials object.
Definition: dbus-credentials.c:71
_dbus_keyring_new_for_credentials
DBusKeyring * _dbus_keyring_new_for_credentials(DBusCredentials *credentials, const DBusString *context, DBusError *error)
Creates a new keyring that lives in the ~/.dbus-keyrings directory of the user represented by credent...
Definition: dbus-keyring.c:705
DBusAuthMechanismHandler::server_data_func
DBusAuthDataFunction server_data_func
Function on server side for DATA.
Definition: dbus-auth.c:105
DBusAuthEncodeFunction
dbus_bool_t(* DBusAuthEncodeFunction)(DBusAuth *auth, const DBusString *data, DBusString *encoded)
This function encodes a block of data from the peer.
Definition: dbus-auth.c:83
_dbus_string_hex_decode
dbus_bool_t _dbus_string_hex_decode(const DBusString *source, int start, int *end_return, DBusString *dest, int insert_at)
Decodes a string from hex encoding.
Definition: dbus-string.c:2309
DBusList
A node in a linked list.
Definition: dbus-list.h:34
dbus_free_string_array
void dbus_free_string_array(char **str_array)
Frees a NULL-terminated array of strings.
Definition: dbus-memory.c:749
_dbus_string_array_contains
dbus_bool_t _dbus_string_array_contains(const char **array, const char *str)
Checks whether a string array contains the given string.
Definition: dbus-internals.c:628
DBusAuthServer::max_failures
int max_failures
Number of times we reject before disconnect.
Definition: dbus-auth.c:217
_dbus_auth_unref
void _dbus_auth_unref(DBusAuth *auth)
Decrements the refcount of an auth object.
Definition: dbus-auth.c:2380
_dbus_generate_random_bytes
dbus_bool_t _dbus_generate_random_bytes(DBusString *str, int n_bytes, DBusError *error)
Generates the given number of securely random bytes, using the best mechanism we can come up with...
Definition: dbus-sysdeps-unix.c:3094
_dbus_auth_get_bytes_to_send
dbus_bool_t _dbus_auth_get_bytes_to_send(DBusAuth *auth, const DBusString **str)
Gets bytes that need to be sent to the peer we&#39;re conversing with.
Definition: dbus-auth.c:2509
DBusAuthCommandName
Mapping from command name to enum.
Definition: dbus-auth.c:2129
DBusAuthMechanismHandler
Virtual table representing a particular auth mechanism.
Definition: dbus-auth.c:102
DBUS_ERROR_NO_MEMORY
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
Definition: dbus-protocol.h:357
_dbus_credentials_unref
void _dbus_credentials_unref(DBusCredentials *credentials)
Decrement refcount on credentials.
Definition: dbus-credentials.c:130
FALSE
#define FALSE
Expands to "0".
DBusAuth::mech
const DBusAuthMechanismHandler * mech
Current auth mechanism.
Definition: dbus-auth.c:163
DBUS_AUTH_SERVER
#define DBUS_AUTH_SERVER(auth)
Definition: dbus-auth.c:331
DBusAuth::unix_fd_possible
unsigned int unix_fd_possible
This side could do unix fd passing.
Definition: dbus-auth.c:192
_dbus_sha_compute
dbus_bool_t _dbus_sha_compute(const DBusString *data, DBusString *ascii_output)
Computes the ASCII hex-encoded shasum of the given data and appends it to the output string...
Definition: dbus-sha.c:483
_dbus_string_set_length
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:802
_dbus_string_copy_len
dbus_bool_t _dbus_string_copy_len(const DBusString *source, int start, int len, DBusString *dest, int insert_at)
Like _dbus_string_copy(), but can copy a segment from the middle of the source string.
Definition: dbus-string.c:1375
dbus_malloc0
void * dbus_malloc0(size_t bytes)
Allocates the given number of bytes, as with standard malloc(), but all bytes are initialized to zero...
Definition: dbus-memory.c:531
_dbus_auth_needs_encoding
dbus_bool_t _dbus_auth_needs_encoding(DBusAuth *auth)
Called post-authentication, indicates whether we need to encode the message stream with _dbus_auth_en...
Definition: dbus-auth.c:2625
DBusAuth::credentials
DBusCredentials * credentials
Credentials read from socket.
Definition: dbus-auth.c:169
_dbus_auth_client_new
DBusAuth * _dbus_auth_client_new(void)
Creates a new auth conversation object for the client side.
Definition: dbus-auth.c:2327
_dbus_string_validate_ascii
dbus_bool_t _dbus_string_validate_ascii(const DBusString *str, int start, int len)
Checks that the given range of the string is valid ASCII with no nul bytes.
Definition: dbus-string.c:2450
DBusAuthServer::base
DBusAuth base
Parent class.
Definition: dbus-auth.c:214
_dbus_keyring_validate_context
dbus_bool_t _dbus_keyring_validate_context(const DBusString *context)
Checks whether the context is a valid context.
Definition: dbus-keyring.c:849
DBUS_AUTH_IN_END_STATE
#define DBUS_AUTH_IN_END_STATE(auth)
Definition: dbus-auth.c:2455
dbus_error_is_set
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set).
Definition: dbus-errors.c:329
DBusAuth::outgoing
DBusString outgoing
Outgoing data buffer.
Definition: dbus-auth.c:159
_dbus_credentials_are_empty
dbus_bool_t _dbus_credentials_are_empty(DBusCredentials *credentials)
Checks whether a credentials object contains anything.
Definition: dbus-credentials.c:391
DBUS_AUTH_IS_CLIENT
#define DBUS_AUTH_IS_CLIENT(auth)
Definition: dbus-auth.c:321
DBusAuthCommandName::command
DBusAuthCommand command
Corresponding enum.
Definition: dbus-auth.c:2131
_dbus_list_clear
void _dbus_list_clear(DBusList **list)
Frees all links in the list and sets the list head to NULL.
Definition: dbus-list.c:542
_dbus_credentials_add_from_user
dbus_bool_t _dbus_credentials_add_from_user(DBusCredentials *credentials, const DBusString *username)
Adds the credentials corresponding to the given username.
Definition: dbus-sysdeps-win.c:2063