D-Bus: dbus-auth.c Source File

D-Bus 1.12.4

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 for (i = 0; all_mechanisms[i].mechanism != NULL; i++)
1489 {
1490 /* skip mechanisms that aren't allowed */
1491 if (auth->allowed_mechs != NULL &&
1492 !_dbus_string_array_contains ((const char**)auth->allowed_mechs,
1493 all_mechanisms[i].mechanism))
1494 continue;
1495
1496 if (!_dbus_string_append (&command,
1497 " "))
1498 goto nomem;
1499
1500 if (!_dbus_string_append (&command,
1501 all_mechanisms[i].mechanism))
1502 goto nomem;
1503 }
1504
1505 if (!_dbus_string_append (&command, "\r\n"))
1506 goto nomem;
1507
1508 if (!_dbus_string_copy (&command, 0, &auth->outgoing,
1509 _dbus_string_get_length (&auth->outgoing)))
1510 goto nomem;
1511
1512 shutdown_mech (auth);
1513
1514 _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
1515 server_auth = DBUS_AUTH_SERVER (auth);
1516 server_auth->failures += 1;
1517
1518 if (server_auth->failures >= server_auth->max_failures)
1519 goto_state (auth, &common_state_need_disconnect);
1520 else
1521 goto_state (auth, &server_state_waiting_for_auth);
1522
1523 _dbus_string_free (&command);
1524
1525 return TRUE;
1526
1527 nomem:
1528 _dbus_string_free (&command);
1529 return FALSE;
1530 }
1531
1532 static dbus_bool_t
1533 send_error (DBusAuth *auth, const char *message)
1534 {
1535 return _dbus_string_append_printf (&auth->outgoing,
1536 "ERROR \"%s\"\r\n", message);
1537 }
1538
1539 static dbus_bool_t
1540 send_ok (DBusAuth *auth)
1541 {
1542 int orig_len;
1543
1544 orig_len = _dbus_string_get_length (&auth->outgoing);
1545
1546 if (_dbus_string_append (&auth->outgoing, "OK ") &&
1547 _dbus_string_copy (& DBUS_AUTH_SERVER (auth)->guid,
1548 0,
1549 &auth->outgoing,
1550 _dbus_string_get_length (&auth->outgoing)) &&
1551 _dbus_string_append (&auth->outgoing, "\r\n"))
1552 {
1553 goto_state (auth, &server_state_waiting_for_begin);
1554 return TRUE;
1555 }
1556 else
1557 {
1558 _dbus_string_set_length (&auth->outgoing, orig_len);
1559 return FALSE;
1560 }
1561 }
1562
1563 static dbus_bool_t
1564 send_begin (DBusAuth *auth)
1565 {
1566
1567 if (!_dbus_string_append (&auth->outgoing,
1568 "BEGIN\r\n"))
1569 return FALSE;
1570
1571 goto_state (auth, &common_state_authenticated);
1572 return TRUE;
1573 }
1574
1575 static dbus_bool_t
1576 process_ok(DBusAuth *auth,
1577 const DBusString *args_from_ok) {
1578
1579 int end_of_hex;
1580
1581 /* "args_from_ok" should be the GUID, whitespace already pulled off the front */
1582 _dbus_assert (_dbus_string_get_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server) == 0);
1583
1584 /* We decode the hex string to binary, using guid_from_server as scratch... */
1585
1586 end_of_hex = 0;
1587 if (!_dbus_string_hex_decode (args_from_ok, 0, &end_of_hex,
1588 & DBUS_AUTH_CLIENT (auth)->guid_from_server, 0))
1589 return FALSE;
1590
1591 /* now clear out the scratch */
1592 _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
1593
1594 if (end_of_hex != _dbus_string_get_length (args_from_ok) ||
1595 end_of_hex == 0)
1596 {
1597 _dbus_verbose ("Bad GUID from server, parsed %d bytes and had %d bytes from server\n",
1598 end_of_hex, _dbus_string_get_length (args_from_ok));
1599 goto_state (auth, &common_state_need_disconnect);
1600 return TRUE;
1601 }
1602
1603 if (!_dbus_string_copy (args_from_ok, 0, &DBUS_AUTH_CLIENT (auth)->guid_from_server, 0)) {
1604 _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
1605 return FALSE;
1606 }
1607
1608 _dbus_verbose ("Got GUID '%s' from the server\n",
1609 _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server));
1610
1611 if (auth->unix_fd_possible)
1612 return send_negotiate_unix_fd(auth);
1613
1614 _dbus_verbose("Not negotiating unix fd passing, since not possible\n");
1615 return send_begin (auth);
1616 }
1617
1618 static dbus_bool_t
1619 send_cancel (DBusAuth *auth)
1620 {
1621 if (_dbus_string_append (&auth->outgoing, "CANCEL\r\n"))
1622 {
1623 goto_state (auth, &client_state_waiting_for_reject);
1624 return TRUE;
1625 }
1626 else
1627 return FALSE;
1628 }
1629
1630 static dbus_bool_t
1631 process_data (DBusAuth *auth,
1632 const DBusString *args,
1633 DBusAuthDataFunction data_func)
1634 {
1635 int end;
1636 DBusString decoded;
1637
1638 if (!_dbus_string_init (&decoded))
1639 return FALSE;
1640
1641 if (!_dbus_string_hex_decode (args, 0, &end, &decoded, 0))
1642 {
1643 _dbus_string_free (&decoded);
1644 return FALSE;
1645 }
1646
1647 if (_dbus_string_get_length (args) != end)
1648 {
1649 _dbus_string_free (&decoded);
1650 if (!send_error (auth, "Invalid hex encoding"))
1651 return FALSE;
1652
1653 return TRUE;
1654 }
1655
1656 #ifdef DBUS_ENABLE_VERBOSE_MODE
1657 if (_dbus_string_validate_ascii (&decoded, 0,
1658 _dbus_string_get_length (&decoded)))
1659 _dbus_verbose ("%s: data: '%s'\n",
1660 DBUS_AUTH_NAME (auth),
1661 _dbus_string_get_const_data (&decoded));
1662 #endif
1663
1664 if (!(* data_func) (auth, &decoded))
1665 {
1666 _dbus_string_free (&decoded);
1667 return FALSE;
1668 }
1669
1670 _dbus_string_free (&decoded);
1671 return TRUE;
1672 }
1673
1674 static dbus_bool_t
1675 send_negotiate_unix_fd (DBusAuth *auth)
1676 {
1677 if (!_dbus_string_append (&auth->outgoing,
1678 "NEGOTIATE_UNIX_FD\r\n"))
1679 return FALSE;
1680
1681 goto_state (auth, &client_state_waiting_for_agree_unix_fd);
1682 return TRUE;
1683 }
1684
1685 static dbus_bool_t
1686 send_agree_unix_fd (DBusAuth *auth)
1687 {
1688 _dbus_assert(auth->unix_fd_possible);
1689
1690 auth->unix_fd_negotiated = TRUE;
1691 _dbus_verbose("Agreed to UNIX FD passing\n");
1692
1693 if (!_dbus_string_append (&auth->outgoing,
1694 "AGREE_UNIX_FD\r\n"))
1695 return FALSE;
1696
1697 goto_state (auth, &server_state_waiting_for_begin);
1698 return TRUE;
1699 }
1700
1701 static dbus_bool_t
1702 handle_auth (DBusAuth *auth, const DBusString *args)
1703 {
1704 if (_dbus_string_get_length (args) == 0)
1705 {
1706 /* No args to the auth, send mechanisms */
1707 if (!send_rejected (auth))
1708 return FALSE;
1709
1710 return TRUE;
1711 }
1712 else
1713 {
1714 int i;
1715 DBusString mech;
1716 DBusString hex_response;
1717
1718 _dbus_string_find_blank (args, 0, &i);
1719
1720 if (!_dbus_string_init (&mech))
1721 return FALSE;
1722
1723 if (!_dbus_string_init (&hex_response))
1724 {
1725 _dbus_string_free (&mech);
1726 return FALSE;
1727 }
1728
1729 if (!_dbus_string_copy_len (args, 0, i, &mech, 0))
1730 goto failed;
1731
1732 _dbus_string_skip_blank (args, i, &i);
1733 if (!_dbus_string_copy (args, i, &hex_response, 0))
1734 goto failed;
1735
1736 auth->mech = find_mech (&mech, auth->allowed_mechs);
1737 if (auth->mech != NULL)
1738 {
1739 _dbus_verbose ("%s: Trying mechanism %s\n",
1740 DBUS_AUTH_NAME (auth),
1741 auth->mech->mechanism);
1742
1743 if (!process_data (auth, &hex_response,
1744 auth->mech->server_data_func))
1745 goto failed;
1746 }
1747 else
1748 {
1749 /* Unsupported mechanism */
1750 _dbus_verbose ("%s: Unsupported mechanism %s\n",
1751 DBUS_AUTH_NAME (auth),
1752 _dbus_string_get_const_data (&mech));
1753
1754 if (!send_rejected (auth))
1755 goto failed;
1756 }
1757
1758 _dbus_string_free (&mech);
1759 _dbus_string_free (&hex_response);
1760
1761 return TRUE;
1762
1763 failed:
1764 auth->mech = NULL;
1765 _dbus_string_free (&mech);
1766 _dbus_string_free (&hex_response);
1767 return FALSE;
1768 }
1769 }
1770
1771 static dbus_bool_t
1772 handle_server_state_waiting_for_auth (DBusAuth *auth,
1773 DBusAuthCommand command,
1774 const DBusString *args)
1775 {
1776 switch (command)
1777 {
1778 case DBUS_AUTH_COMMAND_AUTH:
1779 return handle_auth (auth, args);
1780
1781 case DBUS_AUTH_COMMAND_CANCEL:
1782 case DBUS_AUTH_COMMAND_DATA:
1783 return send_error (auth, "Not currently in an auth conversation");
1784
1785 case DBUS_AUTH_COMMAND_BEGIN:
1786 goto_state (auth, &common_state_need_disconnect);
1787 return TRUE;
1788
1789 case DBUS_AUTH_COMMAND_ERROR:
1790 return send_rejected (auth);
1791
1792 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1793 return send_error (auth, "Need to authenticate first");
1794
1795 case DBUS_AUTH_COMMAND_REJECTED:
1796 case DBUS_AUTH_COMMAND_OK:
1797 case DBUS_AUTH_COMMAND_UNKNOWN:
1798 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1799 default:
1800 return send_error (auth, "Unknown command");
1801 }
1802 }
1803
1804 static dbus_bool_t
1805 handle_server_state_waiting_for_data (DBusAuth *auth,
1806 DBusAuthCommand command,
1807 const DBusString *args)
1808 {
1809 switch (command)
1810 {
1811 case DBUS_AUTH_COMMAND_AUTH:
1812 return send_error (auth, "Sent AUTH while another AUTH in progress");
1813
1814 case DBUS_AUTH_COMMAND_CANCEL:
1815 case DBUS_AUTH_COMMAND_ERROR:
1816 return send_rejected (auth);
1817
1818 case DBUS_AUTH_COMMAND_DATA:
1819 return process_data (auth, args, auth->mech->server_data_func);
1820
1821 case DBUS_AUTH_COMMAND_BEGIN:
1822 goto_state (auth, &common_state_need_disconnect);
1823 return TRUE;
1824
1825 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1826 return send_error (auth, "Need to authenticate first");
1827
1828 case DBUS_AUTH_COMMAND_REJECTED:
1829 case DBUS_AUTH_COMMAND_OK:
1830 case DBUS_AUTH_COMMAND_UNKNOWN:
1831 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1832 default:
1833 return send_error (auth, "Unknown command");
1834 }
1835 }
1836
1837 static dbus_bool_t
1838 handle_server_state_waiting_for_begin (DBusAuth *auth,
1839 DBusAuthCommand command,
1840 const DBusString *args)
1841 {
1842 switch (command)
1843 {
1844 case DBUS_AUTH_COMMAND_AUTH:
1845 return send_error (auth, "Sent AUTH while expecting BEGIN");
1846
1847 case DBUS_AUTH_COMMAND_DATA:
1848 return send_error (auth, "Sent DATA while expecting BEGIN");
1849
1850 case DBUS_AUTH_COMMAND_BEGIN:
1851 goto_state (auth, &common_state_authenticated);
1852 return TRUE;
1853
1854 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
1855 if (auth->unix_fd_possible)
1856 return send_agree_unix_fd(auth);
1857 else
1858 return send_error(auth, "Unix FD passing not supported, not authenticated or otherwise not possible");
1859
1860 case DBUS_AUTH_COMMAND_REJECTED:
1861 case DBUS_AUTH_COMMAND_OK:
1862 case DBUS_AUTH_COMMAND_UNKNOWN:
1863 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
1864 default:
1865 return send_error (auth, "Unknown command");
1866
1867 case DBUS_AUTH_COMMAND_CANCEL:
1868 case DBUS_AUTH_COMMAND_ERROR:
1869 return send_rejected (auth);
1870 }
1871 }
1872
1873 /* return FALSE if no memory, TRUE if all OK */
1874 static dbus_bool_t
1875 get_word (const DBusString *str,
1876 int *start,
1877 DBusString *word)
1878 {
1879 int i;
1880
1881 _dbus_string_skip_blank (str, *start, start);
1882 _dbus_string_find_blank (str, *start, &i);
1883
1884 if (i > *start)
1885 {
1886 if (!_dbus_string_copy_len (str, *start, i - *start, word, 0))
1887 return FALSE;
1888
1889 *start = i;
1890 }
1891
1892 return TRUE;
1893 }
1894
1895 static dbus_bool_t
1896 record_mechanisms (DBusAuth *auth,
1897 const DBusString *args)
1898 {
1899 int next;
1900 int len;
1901
1902 if (auth->already_got_mechanisms)
1903 return TRUE;
1904
1905 len = _dbus_string_get_length (args);
1906
1907 next = 0;
1908 while (next < len)
1909 {
1910 DBusString m;
1911 const DBusAuthMechanismHandler *mech;
1912
1913 if (!_dbus_string_init (&m))
1914 goto nomem;
1915
1916 if (!get_word (args, &next, &m))
1917 {
1918 _dbus_string_free (&m);
1919 goto nomem;
1920 }
1921
1922 mech = find_mech (&m, auth->allowed_mechs);
1923
1924 if (mech != NULL)
1925 {
1926 /* FIXME right now we try mechanisms in the order
1927 * the server lists them; should we do them in
1928 * some more deterministic order?
1929 *
1930 * Probably in all_mechanisms order, our order of
1931 * preference. Of course when the server is us,
1932 * it lists things in that order anyhow.
1933 */
1934
1935 if (mech != &all_mechanisms[0])
1936 {
1937 _dbus_verbose ("%s: Adding mechanism %s to list we will try\n",
1938 DBUS_AUTH_NAME (auth), mech->mechanism);
1939
1940 if (!_dbus_list_append (& DBUS_AUTH_CLIENT (auth)->mechs_to_try,
1941 (void*) mech))
1942 {
1943 _dbus_string_free (&m);
1944 goto nomem;
1945 }
1946 }
1947 else
1948 {
1949 _dbus_verbose ("%s: Already tried mechanism %s; not adding to list we will try\n",
1950 DBUS_AUTH_NAME (auth), mech->mechanism);
1951 }
1952 }
1953 else
1954 {
1955 _dbus_verbose ("%s: Server offered mechanism \"%s\" that we don't know how to use\n",
1956 DBUS_AUTH_NAME (auth),
1957 _dbus_string_get_const_data (&m));
1958 }
1959
1960 _dbus_string_free (&m);
1961 }
1962
1963 auth->already_got_mechanisms = TRUE;
1964
1965 return TRUE;
1966
1967 nomem:
1968 _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
1969
1970 return FALSE;
1971 }
1972
1973 static dbus_bool_t
1974 process_rejected (DBusAuth *auth, const DBusString *args)
1975 {
1976 const DBusAuthMechanismHandler *mech;
1977 DBusAuthClient *client;
1978
1979 client = DBUS_AUTH_CLIENT (auth);
1980
1981 if (!auth->already_got_mechanisms)
1982 {
1983 if (!record_mechanisms (auth, args))
1984 return FALSE;
1985 }
1986
1987 if (DBUS_AUTH_CLIENT (auth)->mechs_to_try != NULL)
1988 {
1989 mech = client->mechs_to_try->data;
1990
1991 if (!send_auth (auth, mech))
1992 return FALSE;
1993
1994 _dbus_list_pop_first (&client->mechs_to_try);
1995
1996 _dbus_verbose ("%s: Trying mechanism %s\n",
1997 DBUS_AUTH_NAME (auth),
1998 mech->mechanism);
1999 }
2000 else
2001 {
2002 /* Give up */
2003 _dbus_verbose ("%s: Disconnecting because we are out of mechanisms to try using\n",
2004 DBUS_AUTH_NAME (auth));
2005 goto_state (auth, &common_state_need_disconnect);
2006 }
2007
2008 return TRUE;
2009 }
2010
2011
2012 static dbus_bool_t
2013 handle_client_state_waiting_for_data (DBusAuth *auth,
2014 DBusAuthCommand command,
2015 const DBusString *args)
2016 {
2017 _dbus_assert (auth->mech != NULL);
2018
2019 switch (command)
2020 {
2021 case DBUS_AUTH_COMMAND_DATA:
2022 return process_data (auth, args, auth->mech->client_data_func);
2023
2024 case DBUS_AUTH_COMMAND_REJECTED:
2025 return process_rejected (auth, args);
2026
2027 case DBUS_AUTH_COMMAND_OK:
2028 return process_ok(auth, args);
2029
2030 case DBUS_AUTH_COMMAND_ERROR:
2031 return send_cancel (auth);
2032
2033 case DBUS_AUTH_COMMAND_AUTH:
2034 case DBUS_AUTH_COMMAND_CANCEL:
2035 case DBUS_AUTH_COMMAND_BEGIN:
2036 case DBUS_AUTH_COMMAND_UNKNOWN:
2037 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2038 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2039 default:
2040 return send_error (auth, "Unknown command");
2041 }
2042 }
2043
2044 static dbus_bool_t
2045 handle_client_state_waiting_for_ok (DBusAuth *auth,
2046 DBusAuthCommand command,
2047 const DBusString *args)
2048 {
2049 switch (command)
2050 {
2051 case DBUS_AUTH_COMMAND_REJECTED:
2052 return process_rejected (auth, args);
2053
2054 case DBUS_AUTH_COMMAND_OK:
2055 return process_ok(auth, args);
2056
2057 case DBUS_AUTH_COMMAND_DATA:
2058 case DBUS_AUTH_COMMAND_ERROR:
2059 return send_cancel (auth);
2060
2061 case DBUS_AUTH_COMMAND_AUTH:
2062 case DBUS_AUTH_COMMAND_CANCEL:
2063 case DBUS_AUTH_COMMAND_BEGIN:
2064 case DBUS_AUTH_COMMAND_UNKNOWN:
2065 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2066 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2067 default:
2068 return send_error (auth, "Unknown command");
2069 }
2070 }
2071
2072 static dbus_bool_t
2073 handle_client_state_waiting_for_reject (DBusAuth *auth,
2074 DBusAuthCommand command,
2075 const DBusString *args)
2076 {
2077 switch (command)
2078 {
2079 case DBUS_AUTH_COMMAND_REJECTED:
2080 return process_rejected (auth, args);
2081
2082 case DBUS_AUTH_COMMAND_AUTH:
2083 case DBUS_AUTH_COMMAND_CANCEL:
2084 case DBUS_AUTH_COMMAND_DATA:
2085 case DBUS_AUTH_COMMAND_BEGIN:
2086 case DBUS_AUTH_COMMAND_OK:
2087 case DBUS_AUTH_COMMAND_ERROR:
2088 case DBUS_AUTH_COMMAND_UNKNOWN:
2089 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2090 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2091 default:
2092 goto_state (auth, &common_state_need_disconnect);
2093 return TRUE;
2094 }
2095 }
2096
2097 static dbus_bool_t
2098 handle_client_state_waiting_for_agree_unix_fd(DBusAuth *auth,
2099 DBusAuthCommand command,
2100 const DBusString *args)
2101 {
2102 switch (command)
2103 {
2104 case DBUS_AUTH_COMMAND_AGREE_UNIX_FD:
2105 _dbus_assert(auth->unix_fd_possible);
2106 auth->unix_fd_negotiated = TRUE;
2107 _dbus_verbose("Successfully negotiated UNIX FD passing\n");
2108 return send_begin (auth);
2109
2110 case DBUS_AUTH_COMMAND_ERROR:
2111 _dbus_assert(auth->unix_fd_possible);
2112 auth->unix_fd_negotiated = FALSE;
2113 _dbus_verbose("Failed to negotiate UNIX FD passing\n");
2114 return send_begin (auth);
2115
2116 case DBUS_AUTH_COMMAND_OK:
2117 case DBUS_AUTH_COMMAND_DATA:
2118 case DBUS_AUTH_COMMAND_REJECTED:
2119 case DBUS_AUTH_COMMAND_AUTH:
2120 case DBUS_AUTH_COMMAND_CANCEL:
2121 case DBUS_AUTH_COMMAND_BEGIN:
2122 case DBUS_AUTH_COMMAND_UNKNOWN:
2123 case DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD:
2124 default:
2125 return send_error (auth, "Unknown command");
2126 }
2127 }
2128
2132 typedef struct {
2133 const char *name;
2134 DBusAuthCommand command;
2135 } DBusAuthCommandName;
2136
2137 static const DBusAuthCommandName auth_command_names[] = {
2138 { "AUTH", DBUS_AUTH_COMMAND_AUTH },
2139 { "CANCEL", DBUS_AUTH_COMMAND_CANCEL },
2140 { "DATA", DBUS_AUTH_COMMAND_DATA },
2141 { "BEGIN", DBUS_AUTH_COMMAND_BEGIN },
2142 { "REJECTED", DBUS_AUTH_COMMAND_REJECTED },
2143 { "OK", DBUS_AUTH_COMMAND_OK },
2144 { "ERROR", DBUS_AUTH_COMMAND_ERROR },
2145 { "NEGOTIATE_UNIX_FD", DBUS_AUTH_COMMAND_NEGOTIATE_UNIX_FD },
2146 { "AGREE_UNIX_FD", DBUS_AUTH_COMMAND_AGREE_UNIX_FD }
2147 };
2148
2149 static DBusAuthCommand
2150 lookup_command_from_name (DBusString *command)
2151 {
2152 int i;
2153
2154 for (i = 0; i < _DBUS_N_ELEMENTS (auth_command_names); i++)
2155 {
2156 if (_dbus_string_equal_c_str (command,
2157 auth_command_names[i].name))
2158 return auth_command_names[i].command;
2159 }
2160
2161 return DBUS_AUTH_COMMAND_UNKNOWN;
2162 }
2163
2164 static void
2165 goto_state (DBusAuth *auth,
2166 const DBusAuthStateData *state)
2167 {
2168 _dbus_verbose ("%s: going from state %s to state %s\n",
2169 DBUS_AUTH_NAME (auth),
2170 auth->state->name,
2171 state->name);
2172
2173 auth->state = state;
2174 }
2175
2176 /* returns whether to call it again right away */
2177 static dbus_bool_t
2178 process_command (DBusAuth *auth)
2179 {
2180 DBusAuthCommand command;
2181 DBusString line;
2182 DBusString args;
2183 int eol;
2184 int i, j;
2185 dbus_bool_t retval;
2186
2187 /* _dbus_verbose ("%s: trying process_command()\n"); */
2188
2189 retval = FALSE;
2190
2191 eol = 0;
2192 if (!_dbus_string_find (&auth->incoming, 0, "\r\n", &eol))
2193 return FALSE;
2194
2195 if (!_dbus_string_init (&line))
2196 {
2197 auth->needed_memory = TRUE;
2198 return FALSE;
2199 }
2200
2201 if (!_dbus_string_init (&args))
2202 {
2203 _dbus_string_free (&line);
2204 auth->needed_memory = TRUE;
2205 return FALSE;
2206 }
2207
2208 if (!_dbus_string_copy_len (&auth->incoming, 0, eol, &line, 0))
2209 goto out;
2210
2211 if (!_dbus_string_validate_ascii (&line, 0,
2212 _dbus_string_get_length (&line)))
2213 {
2214 _dbus_verbose ("%s: Command contained non-ASCII chars or embedded nul\n",
2215 DBUS_AUTH_NAME (auth));
2216 if (!send_error (auth, "Command contained non-ASCII"))
2217 goto out;
2218 else
2219 goto next_command;
2220 }
2221
2222 _dbus_verbose ("%s: got command \"%s\"\n",
2223 DBUS_AUTH_NAME (auth),
2224 _dbus_string_get_const_data (&line));
2225
2226 _dbus_string_find_blank (&line, 0, &i);
2227 _dbus_string_skip_blank (&line, i, &j);
2228
2229 if (j > i)
2230 _dbus_string_delete (&line, i, j - i);
2231
2232 if (!_dbus_string_move (&line, i, &args, 0))
2233 goto out;
2234
2235 /* FIXME 1.0 we should probably validate that only the allowed
2236 * chars are in the command name
2237 */
2238
2239 command = lookup_command_from_name (&line);
2240 if (!(* auth->state->handler) (auth, command, &args))
2241 goto out;
2242
2243 next_command:
2244
2245 /* We've succeeded in processing the whole command so drop it out
2246 * of the incoming buffer and return TRUE to try another command.
2247 */
2248
2249 _dbus_string_delete (&auth->incoming, 0, eol);
2250
2251 /* kill the \r\n */
2252 _dbus_string_delete (&auth->incoming, 0, 2);
2253
2254 retval = TRUE;
2255
2256 out:
2257 _dbus_string_free (&args);
2258 _dbus_string_free (&line);
2259
2260 if (!retval)
2261 auth->needed_memory = TRUE;
2262 else
2263 auth->needed_memory = FALSE;
2264
2265 return retval;
2266 }
2267
2268
2283 DBusAuth*
2284 _dbus_auth_server_new (const DBusString *guid)
2285 {
2286 DBusAuth *auth;
2287 DBusAuthServer *server_auth;
2288 DBusString guid_copy;
2289
2290 if (!_dbus_string_init (&guid_copy))
2291 return NULL;
2292
2293 if (!_dbus_string_copy (guid, 0, &guid_copy, 0))
2294 {
2295 _dbus_string_free (&guid_copy);
2296 return NULL;
2297 }
2298
2299 auth = _dbus_auth_new (sizeof (DBusAuthServer));
2300 if (auth == NULL)
2301 {
2302 _dbus_string_free (&guid_copy);
2303 return NULL;
2304 }
2305
2306 auth->side = auth_side_server;
2307 auth->state = &server_state_waiting_for_auth;
2308
2309 server_auth = DBUS_AUTH_SERVER (auth);
2310
2311 server_auth->guid = guid_copy;
2312
2313 /* perhaps this should be per-mechanism with a lower
2314 * max
2315 */
2316 server_auth->failures = 0;
2317 server_auth->max_failures = 6;
2318
2319 return auth;
2320 }
2321
2329 DBusAuth*
2330 _dbus_auth_client_new (void)
2331 {
2332 DBusAuth *auth;
2333 DBusString guid_str;
2334
2335 if (!_dbus_string_init (&guid_str))
2336 return NULL;
2337
2338 auth = _dbus_auth_new (sizeof (DBusAuthClient));
2339 if (auth == NULL)
2340 {
2341 _dbus_string_free (&guid_str);
2342 return NULL;
2343 }
2344
2345 DBUS_AUTH_CLIENT (auth)->guid_from_server = guid_str;
2346
2347 auth->side = auth_side_client;
2348 auth->state = &client_state_need_send_auth;
2349
2350 /* Start the auth conversation by sending AUTH for our default
2351 * mechanism */
2352 if (!send_auth (auth, &all_mechanisms[0]))
2353 {
2354 _dbus_auth_unref (auth);
2355 return NULL;
2356 }
2357
2358 return auth;
2359 }
2360
2367 DBusAuth *
2368 _dbus_auth_ref (DBusAuth *auth)
2369 {
2370 _dbus_assert (auth != NULL);
2371
2372 auth->refcount += 1;
2373
2374 return auth;
2375 }
2376
2382 void
2383 _dbus_auth_unref (DBusAuth *auth)
2384 {
2385 _dbus_assert (auth != NULL);
2386 _dbus_assert (auth->refcount > 0);
2387
2388 auth->refcount -= 1;
2389 if (auth->refcount == 0)
2390 {
2391 shutdown_mech (auth);
2392
2393 if (DBUS_AUTH_IS_CLIENT (auth))
2394 {
2395 _dbus_string_free (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
2396 _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
2397 }
2398 else
2399 {
2400 _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
2401
2402 _dbus_string_free (& DBUS_AUTH_SERVER (auth)->guid);
2403 }
2404
2405 if (auth->keyring)
2406 _dbus_keyring_unref (auth->keyring);
2407
2408 _dbus_string_free (&auth->context);
2409 _dbus_string_free (&auth->challenge);
2410 _dbus_string_free (&auth->identity);
2411 _dbus_string_free (&auth->incoming);
2412 _dbus_string_free (&auth->outgoing);
2413
2414 dbus_free_string_array (auth->allowed_mechs);
2415
2416 _dbus_credentials_unref (auth->credentials);
2417 _dbus_credentials_unref (auth->authorized_identity);
2418 _dbus_credentials_unref (auth->desired_identity);
2419
2420 dbus_free (auth);
2421 }
2422 }
2423
2432 dbus_bool_t
2433 _dbus_auth_set_mechanisms (DBusAuth *auth,
2434 const char **mechanisms)
2435 {
2436 char **copy;
2437
2438 if (mechanisms != NULL)
2439 {
2440 copy = _dbus_dup_string_array (mechanisms);
2441 if (copy == NULL)
2442 return FALSE;
2443 }
2444 else
2445 copy = NULL;
2446
2447 dbus_free_string_array (auth->allowed_mechs);
2448
2449 auth->allowed_mechs = copy;
2450
2451 return TRUE;
2452 }
2453
2458 #define DBUS_AUTH_IN_END_STATE(auth) ((auth)->state->handler == NULL)
2459
2467 DBusAuthState
2468 _dbus_auth_do_work (DBusAuth *auth)
2469 {
2470 auth->needed_memory = FALSE;
2471
2472 /* Max amount we'll buffer up before deciding someone's on crack */
2473 #define MAX_BUFFER (16 * _DBUS_ONE_KILOBYTE)
2474
2475 do
2476 {
2477 if (DBUS_AUTH_IN_END_STATE (auth))
2478 break;
2479
2480 if (_dbus_string_get_length (&auth->incoming) > MAX_BUFFER ||
2481 _dbus_string_get_length (&auth->outgoing) > MAX_BUFFER)
2482 {
2483 goto_state (auth, &common_state_need_disconnect);
2484 _dbus_verbose ("%s: Disconnecting due to excessive data buffered in auth phase\n",
2485 DBUS_AUTH_NAME (auth));
2486 break;
2487 }
2488 }
2489 while (process_command (auth));
2490
2491 if (auth->needed_memory)
2492 return DBUS_AUTH_STATE_WAITING_FOR_MEMORY;
2493 else if (_dbus_string_get_length (&auth->outgoing) > 0)
2494 return DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND;
2495 else if (auth->state == &common_state_need_disconnect)
2496 return DBUS_AUTH_STATE_NEED_DISCONNECT;
2497 else if (auth->state == &common_state_authenticated)
2498 return DBUS_AUTH_STATE_AUTHENTICATED;
2499 else return DBUS_AUTH_STATE_WAITING_FOR_INPUT;
2500 }
2501
2511 dbus_bool_t
2512 _dbus_auth_get_bytes_to_send (DBusAuth *auth,
2513 const DBusString **str)
2514 {
2515 _dbus_assert (auth != NULL);
2516 _dbus_assert (str != NULL);
2517
2518 *str = NULL;
2519
2520 if (_dbus_string_get_length (&auth->outgoing) == 0)
2521 return FALSE;
2522
2523 *str = &auth->outgoing;
2524
2525 return TRUE;
2526 }
2527
2536 void
2537 _dbus_auth_bytes_sent (DBusAuth *auth,
2538 int bytes_sent)
2539 {
2540 _dbus_verbose ("%s: Sent %d bytes of: %s\n",
2541 DBUS_AUTH_NAME (auth),
2542 bytes_sent,
2543 _dbus_string_get_const_data (&auth->outgoing));
2544
2545 _dbus_string_delete (&auth->outgoing,
2546 0, bytes_sent);
2547 }
2548
2556 void
2557 _dbus_auth_get_buffer (DBusAuth *auth,
2558 DBusString **buffer)
2559 {
2560 _dbus_assert (auth != NULL);
2561 _dbus_assert (!auth->buffer_outstanding);
2562
2563 *buffer = &auth->incoming;
2564
2565 auth->buffer_outstanding = TRUE;
2566 }
2567
2574 void
2575 _dbus_auth_return_buffer (DBusAuth *auth,
2576 DBusString *buffer)
2577 {
2578 _dbus_assert (buffer == &auth->incoming);
2579 _dbus_assert (auth->buffer_outstanding);
2580
2581 auth->buffer_outstanding = FALSE;
2582 }
2583
2593 void
2594 _dbus_auth_get_unused_bytes (DBusAuth *auth,
2595 const DBusString **str)
2596 {
2597 if (!DBUS_AUTH_IN_END_STATE (auth))
2598 return;
2599
2600 *str = &auth->incoming;
2601 }
2602
2603
2610 void
2611 _dbus_auth_delete_unused_bytes (DBusAuth *auth)
2612 {
2613 if (!DBUS_AUTH_IN_END_STATE (auth))
2614 return;
2615
2616 _dbus_string_set_length (&auth->incoming, 0);
2617 }
2618
2627 dbus_bool_t
2628 _dbus_auth_needs_encoding (DBusAuth *auth)
2629 {
2630 if (auth->state != &common_state_authenticated)
2631 return FALSE;
2632
2633 if (auth->mech != NULL)
2634 {
2635 if (DBUS_AUTH_IS_CLIENT (auth))
2636 return auth->mech->client_encode_func != NULL;
2637 else
2638 return auth->mech->server_encode_func != NULL;
2639 }
2640 else
2641 return FALSE;
2642 }
2643
2654 dbus_bool_t
2655 _dbus_auth_encode_data (DBusAuth *auth,
2656 const DBusString *plaintext,
2657 DBusString *encoded)
2658 {
2659 _dbus_assert (plaintext != encoded);
2660
2661 if (auth->state != &common_state_authenticated)
2662 return FALSE;
2663
2664 if (_dbus_auth_needs_encoding (auth))
2665 {
2666 if (DBUS_AUTH_IS_CLIENT (auth))
2667 return (* auth->mech->client_encode_func) (auth, plaintext, encoded);
2668 else
2669 return (* auth->mech->server_encode_func) (auth, plaintext, encoded);
2670 }
2671 else
2672 {
2673 return _dbus_string_copy (plaintext, 0, encoded,
2674 _dbus_string_get_length (encoded));
2675 }
2676 }
2677
2686 dbus_bool_t
2687 _dbus_auth_needs_decoding (DBusAuth *auth)
2688 {
2689 if (auth->state != &common_state_authenticated)
2690 return FALSE;
2691
2692 if (auth->mech != NULL)
2693 {
2694 if (DBUS_AUTH_IS_CLIENT (auth))
2695 return auth->mech->client_decode_func != NULL;
2696 else
2697 return auth->mech->server_decode_func != NULL;
2698 }
2699 else
2700 return FALSE;
2701 }
2702
2703
2717 dbus_bool_t
2718 _dbus_auth_decode_data (DBusAuth *auth,
2719 const DBusString *encoded,
2720 DBusString *plaintext)
2721 {
2722 _dbus_assert (plaintext != encoded);
2723
2724 if (auth->state != &common_state_authenticated)
2725 return FALSE;
2726
2727 if (_dbus_auth_needs_decoding (auth))
2728 {
2729 if (DBUS_AUTH_IS_CLIENT (auth))
2730 return (* auth->mech->client_decode_func) (auth, encoded, plaintext);
2731 else
2732 return (* auth->mech->server_decode_func) (auth, encoded, plaintext);
2733 }
2734 else
2735 {
2736 return _dbus_string_copy (encoded, 0, plaintext,
2737 _dbus_string_get_length (plaintext));
2738 }
2739 }
2740
2749 dbus_bool_t
2750 _dbus_auth_set_credentials (DBusAuth *auth,
2751 DBusCredentials *credentials)
2752 {
2753 _dbus_credentials_clear (auth->credentials);
2754 return _dbus_credentials_add_credentials (auth->credentials,
2755 credentials);
2756 }
2757
2767 DBusCredentials*
2768 _dbus_auth_get_identity (DBusAuth *auth)
2769 {
2770 if (auth->state == &common_state_authenticated)
2771 {
2772 return auth->authorized_identity;
2773 }
2774 else
2775 {
2776 /* FIXME instead of this, keep an empty credential around that
2777 * doesn't require allocation or something
2778 */
2779 /* return empty credentials */
2780 _dbus_assert (_dbus_credentials_are_empty (auth->authorized_identity));
2781 return auth->authorized_identity;
2782 }
2783 }
2784
2791 const char*
2792 _dbus_auth_get_guid_from_server (DBusAuth *auth)
2793 {
2794 _dbus_assert (DBUS_AUTH_IS_CLIENT (auth));
2795
2796 if (auth->state == &common_state_authenticated)
2797 return _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
2798 else
2799 return NULL;
2800 }
2801
2810 dbus_bool_t
2811 _dbus_auth_set_context (DBusAuth *auth,
2812 const DBusString *context)
2813 {
2814 return _dbus_string_replace_len (context, 0, _dbus_string_get_length (context),
2815 &auth->context, 0, _dbus_string_get_length (context));
2816 }
2817
2825 void
2826 _dbus_auth_set_unix_fd_possible(DBusAuth *auth, dbus_bool_t b)
2827 {
2828 auth->unix_fd_possible = b;
2829 }
2830
2837 dbus_bool_t
2838 _dbus_auth_get_unix_fd_negotiated(DBusAuth *auth)
2839 {
2840 return auth->unix_fd_negotiated;
2841 }
2842
2849 dbus_bool_t
2850 _dbus_auth_is_supported_mechanism (DBusString *name)
2851 {
2852 _dbus_assert (name != NULL);
2853
2854 return find_mech (name, NULL) != NULL;
2855 }
2856
2863 dbus_bool_t
2864 _dbus_auth_dump_supported_mechanisms (DBusString *buffer)
2865 {
2866 unsigned int i;
2867 _dbus_assert (buffer != NULL);
2868
2869 for (i = 0; all_mechanisms[i].mechanism != NULL; i++)
2870 {
2871 if (i > 0)
2872 {
2873 if (!_dbus_string_append (buffer, ", "))
2874 return FALSE;
2875 }
2876 if (!_dbus_string_append (buffer, all_mechanisms[i].mechanism))
2877 return FALSE;
2878 }
2879 return TRUE;
2880 }
2881
2884 /* 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:437
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:2611
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
DBusCredentials
Definition: dbus-credentials.c:48
_dbus_auth_dump_supported_mechanisms
dbus_bool_t _dbus_auth_dump_supported_mechanisms(DBusString *buffer)
Return a human-readable string containing all supported auth mechanisms.
Definition: dbus-auth.c:2864
_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:2594
_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:702
_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:2687
_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:356
_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:2655
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:2811
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition: dbus-internals.h:152
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:2575
_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:2468
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:2433
_dbus_auth_is_supported_mechanism
dbus_bool_t _dbus_auth_is_supported_mechanism(DBusString *name)
Queries whether the given auth mechanism is supported.
Definition: dbus-auth.c:2850
_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:2838
_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:2768
_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:2557
DBusAuth::challenge
DBusString challenge
Challenge sent to client.
Definition: dbus-auth.c:179
DBUS_VERSION_STRING
#define DBUS_VERSION_STRING
The COMPILE TIME version of libdbus, as a string "X.Y.Z".
_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:2718
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:2652
_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:2537
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:2284
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:2368
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:2792
_DBUS_N_ELEMENTS
#define _DBUS_N_ELEMENTS(array)
Computes the number of elements in a fixed-size array using sizeof().
Definition: dbus-internals.h:188
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:2133
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:587
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:2750
_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:2826
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:750
_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:627
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:2383
_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:3095
_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:2512
DBusAuthCommandName
Mapping from command name to enum.
Definition: dbus-auth.c:2132
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:532
_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:2628
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:2330
_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:2458
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:2134
_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:2067