2 Unix SMB/CIFS implementation.
4 RFC2478 Compliant SPNEGO implementation
6 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
8 Copyright (C) Stefan Metzmacher <metze@samba.org> 2004-2008
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "../libcli/auth/spnego.h"
27 #include "librpc/gen_ndr/ndr_dcerpc.h"
28 #include "auth/credentials/credentials.h"
29 #include "auth/gensec/gensec.h"
30 #include "auth/gensec/gensec_proto.h"
31 #include "auth/gensec/gensec_toplevel_proto.h"
32 #include "param/param.h"
34 _PUBLIC_ NTSTATUS gensec_spnego_init(void);
36 enum spnego_state_position {
46 enum spnego_message_type expected_packet;
47 enum spnego_state_position state_position;
48 struct gensec_security *sub_sec_security;
49 bool no_response_expected;
57 static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
59 struct spnego_state *spnego_state;
61 spnego_state = talloc(gensec_security, struct spnego_state);
63 return NT_STATUS_NO_MEMORY;
66 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
67 spnego_state->state_position = SPNEGO_CLIENT_START;
68 spnego_state->sub_sec_security = NULL;
69 spnego_state->no_response_expected = false;
70 spnego_state->mech_types = data_blob(NULL, 0);
72 gensec_security->private_data = spnego_state;
76 static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_security)
78 struct spnego_state *spnego_state;
80 spnego_state = talloc(gensec_security, struct spnego_state);
82 return NT_STATUS_NO_MEMORY;
85 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
86 spnego_state->state_position = SPNEGO_SERVER_START;
87 spnego_state->sub_sec_security = NULL;
88 spnego_state->no_response_expected = false;
89 spnego_state->mech_types = data_blob(NULL, 0);
91 gensec_security->private_data = spnego_state;
96 wrappers for the spnego_*() functions
98 static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
99 uint8_t *data, size_t length,
100 const uint8_t *whole_pdu, size_t pdu_length,
101 const DATA_BLOB *sig)
103 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
105 if (spnego_state->state_position != SPNEGO_DONE
106 && spnego_state->state_position != SPNEGO_FALLBACK) {
107 return NT_STATUS_INVALID_PARAMETER;
110 return gensec_unseal_packet(spnego_state->sub_sec_security,
112 whole_pdu, pdu_length,
116 static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
117 const uint8_t *data, size_t length,
118 const uint8_t *whole_pdu, size_t pdu_length,
119 const DATA_BLOB *sig)
121 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
123 if (spnego_state->state_position != SPNEGO_DONE
124 && spnego_state->state_position != SPNEGO_FALLBACK) {
125 return NT_STATUS_INVALID_PARAMETER;
128 return gensec_check_packet(spnego_state->sub_sec_security,
130 whole_pdu, pdu_length,
134 static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
136 uint8_t *data, size_t length,
137 const uint8_t *whole_pdu, size_t pdu_length,
140 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
142 if (spnego_state->state_position != SPNEGO_DONE
143 && spnego_state->state_position != SPNEGO_FALLBACK) {
144 return NT_STATUS_INVALID_PARAMETER;
147 return gensec_seal_packet(spnego_state->sub_sec_security,
150 whole_pdu, pdu_length,
154 static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
156 const uint8_t *data, size_t length,
157 const uint8_t *whole_pdu, size_t pdu_length,
160 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
162 if (spnego_state->state_position != SPNEGO_DONE
163 && spnego_state->state_position != SPNEGO_FALLBACK) {
164 return NT_STATUS_INVALID_PARAMETER;
167 return gensec_sign_packet(spnego_state->sub_sec_security,
170 whole_pdu, pdu_length,
174 static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
179 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
181 if (spnego_state->state_position != SPNEGO_DONE
182 && spnego_state->state_position != SPNEGO_FALLBACK) {
183 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
184 return NT_STATUS_INVALID_PARAMETER;
187 return gensec_wrap(spnego_state->sub_sec_security,
191 static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
196 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
198 if (spnego_state->state_position != SPNEGO_DONE
199 && spnego_state->state_position != SPNEGO_FALLBACK) {
200 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
201 return NT_STATUS_INVALID_PARAMETER;
204 return gensec_unwrap(spnego_state->sub_sec_security,
208 static NTSTATUS gensec_spnego_wrap_packets(struct gensec_security *gensec_security,
212 size_t *len_processed)
214 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
216 if (spnego_state->state_position != SPNEGO_DONE
217 && spnego_state->state_position != SPNEGO_FALLBACK) {
218 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
219 return NT_STATUS_INVALID_PARAMETER;
222 return gensec_wrap_packets(spnego_state->sub_sec_security,
227 static NTSTATUS gensec_spnego_packet_full_request(struct gensec_security *gensec_security,
228 DATA_BLOB blob, size_t *size)
230 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
232 if (spnego_state->state_position != SPNEGO_DONE
233 && spnego_state->state_position != SPNEGO_FALLBACK) {
234 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
235 return NT_STATUS_INVALID_PARAMETER;
238 return gensec_packet_full_request(spnego_state->sub_sec_security,
242 static NTSTATUS gensec_spnego_unwrap_packets(struct gensec_security *gensec_security,
246 size_t *len_processed)
248 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
250 if (spnego_state->state_position != SPNEGO_DONE
251 && spnego_state->state_position != SPNEGO_FALLBACK) {
252 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
253 return NT_STATUS_INVALID_PARAMETER;
256 return gensec_unwrap_packets(spnego_state->sub_sec_security,
261 static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
263 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
265 if (spnego_state->state_position != SPNEGO_DONE
266 && spnego_state->state_position != SPNEGO_FALLBACK) {
270 return gensec_sig_size(spnego_state->sub_sec_security, data_size);
273 static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
275 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
277 if (spnego_state->state_position != SPNEGO_DONE
278 && spnego_state->state_position != SPNEGO_FALLBACK) {
282 return gensec_max_input_size(spnego_state->sub_sec_security);
285 static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
287 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
289 if (spnego_state->state_position != SPNEGO_DONE
290 && spnego_state->state_position != SPNEGO_FALLBACK) {
294 return gensec_max_wrapped_size(spnego_state->sub_sec_security);
297 static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
299 DATA_BLOB *session_key)
301 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
302 if (!spnego_state->sub_sec_security) {
303 return NT_STATUS_INVALID_PARAMETER;
306 return gensec_session_key(spnego_state->sub_sec_security,
311 static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
313 struct auth_session_info **session_info)
315 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
316 if (!spnego_state->sub_sec_security) {
317 return NT_STATUS_INVALID_PARAMETER;
320 return gensec_session_info(spnego_state->sub_sec_security,
325 /** Fallback to another GENSEC mechanism, based on magic strings
327 * This is the 'fallback' case, where we don't get SPNEGO, and have to
328 * try all the other options (and hope they all have a magic string
332 static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
333 struct spnego_state *spnego_state,
334 TALLOC_CTX *out_mem_ctx,
335 const DATA_BLOB in, DATA_BLOB *out)
338 struct gensec_security_ops **all_ops
339 = gensec_security_mechs(gensec_security, out_mem_ctx);
340 for (i=0; all_ops[i]; i++) {
344 if (gensec_security != NULL &&
345 !gensec_security_ops_enabled(all_ops[i], gensec_security))
348 if (!all_ops[i]->oid) {
353 for (j=0; all_ops[i]->oid[j]; j++) {
354 if (strcasecmp(GENSEC_OID_SPNEGO,all_ops[i]->oid[j]) == 0) {
362 if (!all_ops[i]->magic) {
366 nt_status = all_ops[i]->magic(gensec_security, &in);
367 if (!NT_STATUS_IS_OK(nt_status)) {
371 spnego_state->state_position = SPNEGO_FALLBACK;
373 nt_status = gensec_subcontext_start(spnego_state,
375 &spnego_state->sub_sec_security);
377 if (!NT_STATUS_IS_OK(nt_status)) {
380 /* select the sub context */
381 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
383 if (!NT_STATUS_IS_OK(nt_status)) {
386 nt_status = gensec_update(spnego_state->sub_sec_security,
387 out_mem_ctx, in, out);
390 DEBUG(1, ("Failed to parse SPNEGO request\n"));
391 return NT_STATUS_INVALID_PARAMETER;
396 Parse the netTokenInit, either from the client, to the server, or
397 from the server to the client.
400 static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
401 struct spnego_state *spnego_state,
402 TALLOC_CTX *out_mem_ctx,
403 const char **mechType,
404 const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
407 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
408 DATA_BLOB null_data_blob = data_blob(NULL,0);
411 const struct gensec_security_ops_wrapper *all_sec
412 = gensec_security_by_oid_list(gensec_security,
417 ok = spnego_write_mech_types(spnego_state,
419 &spnego_state->mech_types);
421 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
422 return NT_STATUS_NO_MEMORY;
425 if (spnego_state->state_position == SPNEGO_SERVER_START) {
427 for (j=0; mechType && mechType[j]; j++) {
428 for (i=0; all_sec && all_sec[i].op; i++) {
429 nt_status = gensec_subcontext_start(spnego_state,
431 &spnego_state->sub_sec_security);
432 if (!NT_STATUS_IS_OK(nt_status)) {
435 /* select the sub context */
436 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
438 if (!NT_STATUS_IS_OK(nt_status)) {
439 talloc_free(spnego_state->sub_sec_security);
440 spnego_state->sub_sec_security = NULL;
445 /* no optimistic token */
446 spnego_state->neg_oid = all_sec[i].oid;
447 *unwrapped_out = data_blob_null;
448 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
452 nt_status = gensec_update(spnego_state->sub_sec_security,
456 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
457 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
458 /* Pretend we never started it (lets the first run find some incompatible demand) */
460 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
461 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
462 talloc_free(spnego_state->sub_sec_security);
463 spnego_state->sub_sec_security = NULL;
467 spnego_state->neg_oid = all_sec[i].oid;
470 if (spnego_state->sub_sec_security) {
475 if (!spnego_state->sub_sec_security) {
476 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
477 return NT_STATUS_INVALID_PARAMETER;
481 /* Having tried any optimistic token from the client (if we
482 * were the server), if we didn't get anywhere, walk our list
483 * in our preference order */
485 if (!spnego_state->sub_sec_security) {
486 for (i=0; all_sec && all_sec[i].op; i++) {
487 nt_status = gensec_subcontext_start(spnego_state,
489 &spnego_state->sub_sec_security);
490 if (!NT_STATUS_IS_OK(nt_status)) {
493 /* select the sub context */
494 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
496 if (!NT_STATUS_IS_OK(nt_status)) {
497 talloc_free(spnego_state->sub_sec_security);
498 spnego_state->sub_sec_security = NULL;
502 spnego_state->neg_oid = all_sec[i].oid;
504 /* only get the helping start blob for the first OID */
505 nt_status = gensec_update(spnego_state->sub_sec_security,
510 /* it is likely that a NULL input token will
511 * not be liked by most server mechs, but if
512 * we are in the client, we want the first
513 * update packet to be able to abort the use
515 if (spnego_state->state_position != SPNEGO_SERVER_START) {
516 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
517 NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_LOGON_SERVERS) ||
518 NT_STATUS_EQUAL(nt_status, NT_STATUS_LOGON_FAILURE) ||
519 NT_STATUS_EQUAL(nt_status, NT_STATUS_TIME_DIFFERENCE_AT_DC) ||
520 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
521 /* Pretend we never started it (lets the first run find some incompatible demand) */
523 DEBUG(3, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
524 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
525 talloc_free(spnego_state->sub_sec_security);
526 spnego_state->sub_sec_security = NULL;
535 if (spnego_state->sub_sec_security) {
536 /* it is likely that a NULL input token will
537 * not be liked by most server mechs, but this
538 * does the right thing in the CIFS client.
539 * just push us along the merry-go-round
540 * again, and hope for better luck next
543 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
544 *unwrapped_out = data_blob(NULL, 0);
545 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
548 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
549 && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
550 && !NT_STATUS_IS_OK(nt_status)) {
551 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
552 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
553 talloc_free(spnego_state->sub_sec_security);
554 spnego_state->sub_sec_security = NULL;
556 /* We started the mech correctly, and the
557 * input from the other side was valid.
558 * Return the error (say bad password, invalid
564 return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
567 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
568 /* we could re-negotiate here, but it would only work
569 * if the client or server lied about what it could
570 * support the first time. Lets keep this code to
576 /** create a negTokenInit
578 * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
580 static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
581 struct spnego_state *spnego_state,
582 TALLOC_CTX *out_mem_ctx,
583 const DATA_BLOB in, DATA_BLOB *out)
586 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
587 DATA_BLOB null_data_blob = data_blob(NULL,0);
588 const char **mechTypes = NULL;
589 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
590 const struct gensec_security_ops_wrapper *all_sec;
592 mechTypes = gensec_security_oids(gensec_security,
593 out_mem_ctx, GENSEC_OID_SPNEGO);
595 all_sec = gensec_security_by_oid_list(gensec_security,
599 for (i=0; all_sec && all_sec[i].op; i++) {
600 struct spnego_data spnego_out;
601 const char **send_mech_types;
604 nt_status = gensec_subcontext_start(spnego_state,
606 &spnego_state->sub_sec_security);
607 if (!NT_STATUS_IS_OK(nt_status)) {
610 /* select the sub context */
611 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
613 if (!NT_STATUS_IS_OK(nt_status)) {
614 talloc_free(spnego_state->sub_sec_security);
615 spnego_state->sub_sec_security = NULL;
619 /* In the client, try and produce the first (optimistic) packet */
620 if (spnego_state->state_position == SPNEGO_CLIENT_START) {
621 nt_status = gensec_update(spnego_state->sub_sec_security,
626 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
627 && !NT_STATUS_IS_OK(nt_status)) {
628 DEBUG(1, ("SPNEGO(%s) creating NEG_TOKEN_INIT failed: %s\n",
629 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
630 talloc_free(spnego_state->sub_sec_security);
631 spnego_state->sub_sec_security = NULL;
632 /* Pretend we never started it (lets the first run find some incompatible demand) */
638 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
640 send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
643 ok = spnego_write_mech_types(spnego_state,
645 &spnego_state->mech_types);
647 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
648 return NT_STATUS_NO_MEMORY;
651 /* List the remaining mechs as options */
652 spnego_out.negTokenInit.mechTypes = send_mech_types;
653 spnego_out.negTokenInit.reqFlags = null_data_blob;
654 spnego_out.negTokenInit.reqFlagsPadding = 0;
656 if (spnego_state->state_position == SPNEGO_SERVER_START) {
657 spnego_out.negTokenInit.mechListMIC
658 = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
660 spnego_out.negTokenInit.mechListMIC = null_data_blob;
663 spnego_out.negTokenInit.mechToken = unwrapped_out;
665 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
666 DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
667 return NT_STATUS_INVALID_PARAMETER;
671 spnego_state->neg_oid = all_sec[i].oid;
673 if (NT_STATUS_IS_OK(nt_status)) {
674 spnego_state->no_response_expected = true;
677 return NT_STATUS_MORE_PROCESSING_REQUIRED;
679 talloc_free(spnego_state->sub_sec_security);
680 spnego_state->sub_sec_security = NULL;
682 DEBUG(1, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
683 return NT_STATUS_INVALID_PARAMETER;
687 /** create a server negTokenTarg
689 * This is the case, where the client is the first one who sends data
692 static NTSTATUS gensec_spnego_server_negTokenTarg(struct gensec_security *gensec_security,
693 struct spnego_state *spnego_state,
694 TALLOC_CTX *out_mem_ctx,
696 const DATA_BLOB unwrapped_out,
697 DATA_BLOB mech_list_mic,
700 struct spnego_data spnego_out;
701 DATA_BLOB null_data_blob = data_blob(NULL, 0);
704 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
705 spnego_out.negTokenTarg.responseToken = unwrapped_out;
706 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
707 spnego_out.negTokenTarg.supportedMech = NULL;
709 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
710 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
711 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
712 spnego_state->state_position = SPNEGO_SERVER_TARG;
713 } else if (NT_STATUS_IS_OK(nt_status)) {
714 if (unwrapped_out.data) {
715 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
717 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
718 spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
719 spnego_state->state_position = SPNEGO_DONE;
721 spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
722 DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
723 spnego_state->state_position = SPNEGO_DONE;
726 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
727 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
728 return NT_STATUS_INVALID_PARAMETER;
731 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
737 static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
738 const DATA_BLOB in, DATA_BLOB *out)
740 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
741 DATA_BLOB null_data_blob = data_blob(NULL, 0);
742 DATA_BLOB mech_list_mic = data_blob(NULL, 0);
743 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
744 struct spnego_data spnego_out;
745 struct spnego_data spnego;
749 *out = data_blob(NULL, 0);
752 out_mem_ctx = spnego_state;
755 /* and switch into the state machine */
757 switch (spnego_state->state_position) {
758 case SPNEGO_FALLBACK:
759 return gensec_update(spnego_state->sub_sec_security,
760 out_mem_ctx, in, out);
761 case SPNEGO_SERVER_START:
766 len = spnego_read_data(gensec_security, in, &spnego);
768 return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
769 out_mem_ctx, in, out);
771 /* client sent NegTargetInit, we send NegTokenTarg */
773 /* OK, so it's real SPNEGO, check the packet's the one we expect */
774 if (spnego.type != spnego_state->expected_packet) {
775 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
776 spnego_state->expected_packet));
777 dump_data(1, in.data, in.length);
778 spnego_free_data(&spnego);
779 return NT_STATUS_INVALID_PARAMETER;
782 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
785 spnego.negTokenInit.mechTypes,
786 spnego.negTokenInit.mechToken,
789 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
797 spnego_free_data(&spnego);
801 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
802 out_mem_ctx, in, out);
803 spnego_state->state_position = SPNEGO_SERVER_START;
804 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
809 case SPNEGO_CLIENT_START:
811 /* The server offers a list of mechanisms */
813 const char *my_mechs[] = {NULL, NULL};
814 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
817 /* client to produce negTokenInit */
818 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
819 out_mem_ctx, in, out);
820 spnego_state->state_position = SPNEGO_CLIENT_TARG;
821 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
825 len = spnego_read_data(gensec_security, in, &spnego);
828 DEBUG(1, ("Invalid SPNEGO request:\n"));
829 dump_data(1, in.data, in.length);
830 return NT_STATUS_INVALID_PARAMETER;
833 /* OK, so it's real SPNEGO, check the packet's the one we expect */
834 if (spnego.type != spnego_state->expected_packet) {
835 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
836 spnego_state->expected_packet));
837 dump_data(1, in.data, in.length);
838 spnego_free_data(&spnego);
839 return NT_STATUS_INVALID_PARAMETER;
842 if (spnego.negTokenInit.targetPrincipal
843 && strcmp(spnego.negTokenInit.targetPrincipal, ADS_IGNORE_PRINCIPAL) != 0) {
844 DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
845 if (lpcfg_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
846 gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
850 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
853 spnego.negTokenInit.mechTypes,
854 spnego.negTokenInit.mechToken,
857 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
858 spnego_free_data(&spnego);
862 my_mechs[0] = spnego_state->neg_oid;
864 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
865 spnego_out.negTokenInit.mechTypes = my_mechs;
866 spnego_out.negTokenInit.reqFlags = null_data_blob;
867 spnego_out.negTokenInit.reqFlagsPadding = 0;
868 spnego_out.negTokenInit.mechListMIC = null_data_blob;
869 spnego_out.negTokenInit.mechToken = unwrapped_out;
871 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
872 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
873 return NT_STATUS_INVALID_PARAMETER;
877 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
878 spnego_state->state_position = SPNEGO_CLIENT_TARG;
880 if (NT_STATUS_IS_OK(nt_status)) {
881 spnego_state->no_response_expected = true;
884 spnego_free_data(&spnego);
885 return NT_STATUS_MORE_PROCESSING_REQUIRED;
887 case SPNEGO_SERVER_TARG:
890 bool new_spnego = false;
893 return NT_STATUS_INVALID_PARAMETER;
896 len = spnego_read_data(gensec_security, in, &spnego);
899 DEBUG(1, ("Invalid SPNEGO request:\n"));
900 dump_data(1, in.data, in.length);
901 return NT_STATUS_INVALID_PARAMETER;
904 /* OK, so it's real SPNEGO, check the packet's the one we expect */
905 if (spnego.type != spnego_state->expected_packet) {
906 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
907 spnego_state->expected_packet));
908 dump_data(1, in.data, in.length);
909 spnego_free_data(&spnego);
910 return NT_STATUS_INVALID_PARAMETER;
913 if (!spnego_state->sub_sec_security) {
914 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
915 spnego_free_data(&spnego);
916 return NT_STATUS_INVALID_PARAMETER;
919 nt_status = gensec_update(spnego_state->sub_sec_security,
921 spnego.negTokenTarg.responseToken,
923 if (NT_STATUS_IS_OK(nt_status) && spnego.negTokenTarg.mechListMIC.length > 0) {
925 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
926 spnego_state->mech_types.data,
927 spnego_state->mech_types.length,
928 spnego_state->mech_types.data,
929 spnego_state->mech_types.length,
930 &spnego.negTokenTarg.mechListMIC);
931 if (!NT_STATUS_IS_OK(nt_status)) {
932 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
933 nt_errstr(nt_status)));
936 if (NT_STATUS_IS_OK(nt_status) && new_spnego) {
937 nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
939 spnego_state->mech_types.data,
940 spnego_state->mech_types.length,
941 spnego_state->mech_types.data,
942 spnego_state->mech_types.length,
944 if (!NT_STATUS_IS_OK(nt_status)) {
945 DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
946 nt_errstr(nt_status)));
950 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
958 spnego_free_data(&spnego);
962 case SPNEGO_CLIENT_TARG:
966 return NT_STATUS_INVALID_PARAMETER;
969 len = spnego_read_data(gensec_security, in, &spnego);
972 DEBUG(1, ("Invalid SPNEGO request:\n"));
973 dump_data(1, in.data, in.length);
974 return NT_STATUS_INVALID_PARAMETER;
977 /* OK, so it's real SPNEGO, check the packet's the one we expect */
978 if (spnego.type != spnego_state->expected_packet) {
979 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
980 spnego_state->expected_packet));
981 dump_data(1, in.data, in.length);
982 spnego_free_data(&spnego);
983 return NT_STATUS_INVALID_PARAMETER;
986 if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
987 spnego_free_data(&spnego);
988 return NT_STATUS_ACCESS_DENIED;
991 /* Server didn't like our choice of mech, and chose something else */
992 if ((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) &&
993 spnego.negTokenTarg.supportedMech &&
994 strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
995 DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
996 gensec_get_name_by_oid(gensec_security, spnego.negTokenTarg.supportedMech),
997 gensec_get_name_by_oid(gensec_security, spnego_state->neg_oid)));
999 talloc_free(spnego_state->sub_sec_security);
1000 nt_status = gensec_subcontext_start(spnego_state,
1002 &spnego_state->sub_sec_security);
1003 if (!NT_STATUS_IS_OK(nt_status)) {
1004 spnego_free_data(&spnego);
1007 /* select the sub context */
1008 nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
1009 spnego.negTokenTarg.supportedMech);
1010 if (!NT_STATUS_IS_OK(nt_status)) {
1011 spnego_free_data(&spnego);
1015 nt_status = gensec_update(spnego_state->sub_sec_security,
1017 spnego.negTokenTarg.responseToken,
1019 spnego_state->neg_oid = talloc_strdup(spnego_state, spnego.negTokenTarg.supportedMech);
1020 } else if (spnego_state->no_response_expected) {
1021 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
1022 DEBUG(3,("GENSEC SPNEGO: client GENSEC accepted, but server rejected (bad password?)\n"));
1023 nt_status = NT_STATUS_INVALID_PARAMETER;
1024 } else if (spnego.negTokenTarg.responseToken.length) {
1025 DEBUG(2,("GENSEC SPNEGO: client GENSEC accepted, but server continued negotiation!\n"));
1026 nt_status = NT_STATUS_INVALID_PARAMETER;
1028 nt_status = NT_STATUS_OK;
1030 if (NT_STATUS_IS_OK(nt_status) && spnego.negTokenTarg.mechListMIC.length > 0) {
1031 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1032 spnego_state->mech_types.data,
1033 spnego_state->mech_types.length,
1034 spnego_state->mech_types.data,
1035 spnego_state->mech_types.length,
1036 &spnego.negTokenTarg.mechListMIC);
1037 if (!NT_STATUS_IS_OK(nt_status)) {
1038 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1039 nt_errstr(nt_status)));
1043 bool new_spnego = false;
1045 nt_status = gensec_update(spnego_state->sub_sec_security,
1047 spnego.negTokenTarg.responseToken,
1050 if (NT_STATUS_IS_OK(nt_status)
1051 && spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
1052 new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
1053 GENSEC_FEATURE_NEW_SPNEGO);
1055 if (NT_STATUS_IS_OK(nt_status) && new_spnego) {
1056 nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
1058 spnego_state->mech_types.data,
1059 spnego_state->mech_types.length,
1060 spnego_state->mech_types.data,
1061 spnego_state->mech_types.length,
1063 if (!NT_STATUS_IS_OK(nt_status)) {
1064 DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
1065 nt_errstr(nt_status)));
1068 if (NT_STATUS_IS_OK(nt_status)) {
1069 spnego_state->no_response_expected = true;
1073 spnego_free_data(&spnego);
1075 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
1076 && !NT_STATUS_IS_OK(nt_status)) {
1077 DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
1078 spnego_state->sub_sec_security->ops->name,
1079 nt_errstr(nt_status)));
1083 if (unwrapped_out.length || mech_list_mic.length) {
1085 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
1086 spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
1087 spnego_out.negTokenTarg.supportedMech = NULL;
1088 spnego_out.negTokenTarg.responseToken = unwrapped_out;
1089 spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
1091 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
1092 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
1093 return NT_STATUS_INVALID_PARAMETER;
1096 spnego_state->state_position = SPNEGO_CLIENT_TARG;
1097 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1100 /* all done - server has accepted, and we agree */
1101 *out = null_data_blob;
1103 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
1104 /* unless of course it did not accept */
1105 DEBUG(1,("gensec_update ok but not accepted\n"));
1106 nt_status = NT_STATUS_INVALID_PARAMETER;
1109 spnego_state->state_position = SPNEGO_DONE;
1115 /* We should not be called after we are 'done' */
1116 return NT_STATUS_INVALID_PARAMETER;
1118 return NT_STATUS_INVALID_PARAMETER;
1121 static void gensec_spnego_want_feature(struct gensec_security *gensec_security,
1124 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1126 if (!spnego_state || !spnego_state->sub_sec_security) {
1127 gensec_security->want_features |= feature;
1131 gensec_want_feature(spnego_state->sub_sec_security,
1135 static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
1138 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1139 if (!spnego_state->sub_sec_security) {
1143 return gensec_have_feature(spnego_state->sub_sec_security,
1147 static const char *gensec_spnego_oids[] = {
1152 static const struct gensec_security_ops gensec_spnego_security_ops = {
1154 .sasl_name = "GSS-SPNEGO",
1155 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1156 .oid = gensec_spnego_oids,
1157 .client_start = gensec_spnego_client_start,
1158 .server_start = gensec_spnego_server_start,
1159 .update = gensec_spnego_update,
1160 .seal_packet = gensec_spnego_seal_packet,
1161 .sign_packet = gensec_spnego_sign_packet,
1162 .sig_size = gensec_spnego_sig_size,
1163 .max_wrapped_size = gensec_spnego_max_wrapped_size,
1164 .max_input_size = gensec_spnego_max_input_size,
1165 .check_packet = gensec_spnego_check_packet,
1166 .unseal_packet = gensec_spnego_unseal_packet,
1167 .packet_full_request = gensec_spnego_packet_full_request,
1168 .wrap = gensec_spnego_wrap,
1169 .unwrap = gensec_spnego_unwrap,
1170 .wrap_packets = gensec_spnego_wrap_packets,
1171 .unwrap_packets = gensec_spnego_unwrap_packets,
1172 .session_key = gensec_spnego_session_key,
1173 .session_info = gensec_spnego_session_info,
1174 .want_feature = gensec_spnego_want_feature,
1175 .have_feature = gensec_spnego_have_feature,
1177 .priority = GENSEC_SPNEGO
1180 _PUBLIC_ NTSTATUS gensec_spnego_init(void)
1183 ret = gensec_register(&gensec_spnego_security_ops);
1184 if (!NT_STATUS_IS_OK(ret)) {
1185 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1186 gensec_spnego_security_ops.name));