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_internal.h"
31 #include "param/param.h"
32 #include "lib/util/asn1.h"
33 #include "lib/util/base64.h"
37 _PUBLIC_ NTSTATUS gensec_spnego_init(TALLOC_CTX *ctx);
39 enum spnego_state_position {
49 enum spnego_message_type expected_packet;
50 enum spnego_state_position state_position;
51 struct gensec_security *sub_sec_security;
52 bool no_response_expected;
62 bool may_skip_mic_check;
68 * The following is used to implement
69 * the update token fragmentation
73 size_t out_max_length;
79 static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
81 struct spnego_state *spnego_state;
83 spnego_state = talloc_zero(gensec_security, struct spnego_state);
85 return NT_STATUS_NO_MEMORY;
88 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
89 spnego_state->state_position = SPNEGO_CLIENT_START;
90 spnego_state->sub_sec_security = NULL;
91 spnego_state->no_response_expected = false;
92 spnego_state->mech_types = data_blob(NULL, 0);
93 spnego_state->out_max_length = gensec_max_update_size(gensec_security);
94 spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
96 spnego_state->simulate_w2k = gensec_setting_bool(gensec_security->settings,
97 "spnego", "simulate_w2k", false);
99 gensec_security->private_data = spnego_state;
103 static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_security)
105 struct spnego_state *spnego_state;
107 spnego_state = talloc_zero(gensec_security, struct spnego_state);
109 return NT_STATUS_NO_MEMORY;
112 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
113 spnego_state->state_position = SPNEGO_SERVER_START;
114 spnego_state->sub_sec_security = NULL;
115 spnego_state->no_response_expected = false;
116 spnego_state->mech_types = data_blob(NULL, 0);
117 spnego_state->out_max_length = gensec_max_update_size(gensec_security);
118 spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
120 spnego_state->simulate_w2k = gensec_setting_bool(gensec_security->settings,
121 "spnego", "simulate_w2k", false);
123 gensec_security->private_data = spnego_state;
128 wrappers for the spnego_*() functions
130 static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
131 uint8_t *data, size_t length,
132 const uint8_t *whole_pdu, size_t pdu_length,
133 const DATA_BLOB *sig)
135 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
137 if (spnego_state->state_position != SPNEGO_DONE
138 && spnego_state->state_position != SPNEGO_FALLBACK) {
139 return NT_STATUS_INVALID_PARAMETER;
142 return gensec_unseal_packet(spnego_state->sub_sec_security,
144 whole_pdu, pdu_length,
148 static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
149 const uint8_t *data, size_t length,
150 const uint8_t *whole_pdu, size_t pdu_length,
151 const DATA_BLOB *sig)
153 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
155 if (spnego_state->state_position != SPNEGO_DONE
156 && spnego_state->state_position != SPNEGO_FALLBACK) {
157 return NT_STATUS_INVALID_PARAMETER;
160 return gensec_check_packet(spnego_state->sub_sec_security,
162 whole_pdu, pdu_length,
166 static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
168 uint8_t *data, size_t length,
169 const uint8_t *whole_pdu, size_t pdu_length,
172 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
174 if (spnego_state->state_position != SPNEGO_DONE
175 && spnego_state->state_position != SPNEGO_FALLBACK) {
176 return NT_STATUS_INVALID_PARAMETER;
179 return gensec_seal_packet(spnego_state->sub_sec_security,
182 whole_pdu, pdu_length,
186 static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
188 const uint8_t *data, size_t length,
189 const uint8_t *whole_pdu, size_t pdu_length,
192 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
194 if (spnego_state->state_position != SPNEGO_DONE
195 && spnego_state->state_position != SPNEGO_FALLBACK) {
196 return NT_STATUS_INVALID_PARAMETER;
199 return gensec_sign_packet(spnego_state->sub_sec_security,
202 whole_pdu, pdu_length,
206 static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
211 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
213 if (spnego_state->state_position != SPNEGO_DONE
214 && spnego_state->state_position != SPNEGO_FALLBACK) {
215 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
216 return NT_STATUS_INVALID_PARAMETER;
219 return gensec_wrap(spnego_state->sub_sec_security,
223 static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
228 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
230 if (spnego_state->state_position != SPNEGO_DONE
231 && spnego_state->state_position != SPNEGO_FALLBACK) {
232 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
233 return NT_STATUS_INVALID_PARAMETER;
236 return gensec_unwrap(spnego_state->sub_sec_security,
240 static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
242 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
244 if (spnego_state->state_position != SPNEGO_DONE
245 && spnego_state->state_position != SPNEGO_FALLBACK) {
249 return gensec_sig_size(spnego_state->sub_sec_security, data_size);
252 static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
254 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
256 if (spnego_state->state_position != SPNEGO_DONE
257 && spnego_state->state_position != SPNEGO_FALLBACK) {
261 return gensec_max_input_size(spnego_state->sub_sec_security);
264 static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
266 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
268 if (spnego_state->state_position != SPNEGO_DONE
269 && spnego_state->state_position != SPNEGO_FALLBACK) {
273 return gensec_max_wrapped_size(spnego_state->sub_sec_security);
276 static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
278 DATA_BLOB *session_key)
280 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
281 if (!spnego_state->sub_sec_security) {
282 return NT_STATUS_INVALID_PARAMETER;
285 return gensec_session_key(spnego_state->sub_sec_security,
290 static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
292 struct auth_session_info **session_info)
294 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
295 if (!spnego_state->sub_sec_security) {
296 return NT_STATUS_INVALID_PARAMETER;
299 return gensec_session_info(spnego_state->sub_sec_security,
304 /** Fallback to another GENSEC mechanism, based on magic strings
306 * This is the 'fallback' case, where we don't get SPNEGO, and have to
307 * try all the other options (and hope they all have a magic string
311 static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
312 struct spnego_state *spnego_state,
313 struct tevent_context *ev,
314 TALLOC_CTX *out_mem_ctx,
315 const DATA_BLOB in, DATA_BLOB *out)
318 const struct gensec_security_ops **all_ops;
320 all_ops = gensec_security_mechs(gensec_security, out_mem_ctx);
322 for (i=0; all_ops && all_ops[i]; i++) {
326 if (gensec_security != NULL &&
327 !gensec_security_ops_enabled(all_ops[i], gensec_security))
330 if (!all_ops[i]->oid) {
335 for (j=0; all_ops[i]->oid[j]; j++) {
336 if (strcasecmp(GENSEC_OID_SPNEGO,all_ops[i]->oid[j]) == 0) {
344 if (!all_ops[i]->magic) {
348 nt_status = all_ops[i]->magic(gensec_security, &in);
349 if (!NT_STATUS_IS_OK(nt_status)) {
353 spnego_state->state_position = SPNEGO_FALLBACK;
355 nt_status = gensec_subcontext_start(spnego_state,
357 &spnego_state->sub_sec_security);
359 if (!NT_STATUS_IS_OK(nt_status)) {
362 /* select the sub context */
363 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
365 if (!NT_STATUS_IS_OK(nt_status)) {
368 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
369 ev, out_mem_ctx, in, out);
372 DEBUG(1, ("Failed to parse SPNEGO request\n"));
373 return NT_STATUS_INVALID_PARAMETER;
377 Parse the netTokenInit, either from the client, to the server, or
378 from the server to the client.
381 static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
382 struct spnego_state *spnego_state,
383 TALLOC_CTX *out_mem_ctx,
384 struct tevent_context *ev,
385 const char * const *mechType,
386 const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
389 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
390 DATA_BLOB null_data_blob = data_blob(NULL,0);
393 const struct gensec_security_ops_wrapper *all_sec
394 = gensec_security_by_oid_list(gensec_security,
399 ok = spnego_write_mech_types(spnego_state,
401 &spnego_state->mech_types);
403 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
404 return NT_STATUS_NO_MEMORY;
407 if (spnego_state->state_position == SPNEGO_SERVER_START) {
409 for (j=0; mechType && mechType[j]; j++) {
410 for (i=0; all_sec && all_sec[i].op; i++) {
411 if (strcmp(mechType[j], all_sec[i].oid) != 0) {
415 nt_status = gensec_subcontext_start(spnego_state,
417 &spnego_state->sub_sec_security);
418 if (!NT_STATUS_IS_OK(nt_status)) {
421 /* select the sub context */
422 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
424 if (!NT_STATUS_IS_OK(nt_status)) {
425 talloc_free(spnego_state->sub_sec_security);
426 spnego_state->sub_sec_security = NULL;
431 /* no optimistic token */
432 spnego_state->neg_oid = all_sec[i].oid;
433 *unwrapped_out = data_blob_null;
434 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
436 * Indicate the downgrade and request a
439 spnego_state->downgraded = true;
440 spnego_state->mic_requested = true;
444 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
449 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
450 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
451 /* Pretend we never started it (lets the first run find some incompatible demand) */
453 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
454 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
455 talloc_free(spnego_state->sub_sec_security);
456 spnego_state->sub_sec_security = NULL;
460 spnego_state->neg_oid = all_sec[i].oid;
463 if (spnego_state->sub_sec_security) {
468 if (!spnego_state->sub_sec_security) {
469 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
470 return NT_STATUS_INVALID_PARAMETER;
474 /* Having tried any optimistic token from the client (if we
475 * were the server), if we didn't get anywhere, walk our list
476 * in our preference order */
478 if (!spnego_state->sub_sec_security) {
479 for (i=0; all_sec && all_sec[i].op; i++) {
480 nt_status = gensec_subcontext_start(spnego_state,
482 &spnego_state->sub_sec_security);
483 if (!NT_STATUS_IS_OK(nt_status)) {
486 /* select the sub context */
487 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
489 if (!NT_STATUS_IS_OK(nt_status)) {
490 talloc_free(spnego_state->sub_sec_security);
491 spnego_state->sub_sec_security = NULL;
495 spnego_state->neg_oid = all_sec[i].oid;
497 /* only get the helping start blob for the first OID */
498 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
504 /* it is likely that a NULL input token will
505 * not be liked by most server mechs, but if
506 * we are in the client, we want the first
507 * update packet to be able to abort the use
509 if (spnego_state->state_position != SPNEGO_SERVER_START) {
510 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
511 NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_LOGON_SERVERS) ||
512 NT_STATUS_EQUAL(nt_status, NT_STATUS_TIME_DIFFERENCE_AT_DC) ||
513 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
514 const char *next = NULL;
515 const char *principal = NULL;
516 int dbg_level = DBGLVL_WARNING;
518 if (all_sec[i+1].op != NULL) {
519 next = all_sec[i+1].op->name;
520 dbg_level = DBGLVL_NOTICE;
523 if (gensec_security->target.principal != NULL) {
524 principal = gensec_security->target.principal;
525 } else if (gensec_security->target.service != NULL &&
526 gensec_security->target.hostname != NULL)
528 principal = talloc_asprintf(spnego_state->sub_sec_security,
530 gensec_security->target.service,
531 gensec_security->target.hostname);
533 principal = gensec_security->target.hostname;
536 DEBUG(dbg_level, ("SPNEGO(%s) creating NEG_TOKEN_INIT for %s failed (next[%s]): %s\n",
537 spnego_state->sub_sec_security->ops->name,
539 next, nt_errstr(nt_status)));
541 /* Pretend we never started it (lets the first run find some incompatible demand) */
542 talloc_free(spnego_state->sub_sec_security);
543 spnego_state->sub_sec_security = NULL;
552 if (spnego_state->sub_sec_security) {
553 /* it is likely that a NULL input token will
554 * not be liked by most server mechs, but this
555 * does the right thing in the CIFS client.
556 * just push us along the merry-go-round
557 * again, and hope for better luck next
560 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
561 *unwrapped_out = data_blob(NULL, 0);
562 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
565 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
566 && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
567 && !NT_STATUS_IS_OK(nt_status)) {
568 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
569 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
570 talloc_free(spnego_state->sub_sec_security);
571 spnego_state->sub_sec_security = NULL;
573 /* We started the mech correctly, and the
574 * input from the other side was valid.
575 * Return the error (say bad password, invalid
580 return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
583 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
584 /* we could re-negotiate here, but it would only work
585 * if the client or server lied about what it could
586 * support the first time. Lets keep this code to
592 /** create a negTokenInit
594 * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
596 static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
597 struct spnego_state *spnego_state,
598 TALLOC_CTX *out_mem_ctx,
599 struct tevent_context *ev,
600 const DATA_BLOB in, DATA_BLOB *out)
603 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
604 DATA_BLOB null_data_blob = data_blob(NULL,0);
605 const char **mechTypes = NULL;
606 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
607 const struct gensec_security_ops_wrapper *all_sec;
609 mechTypes = gensec_security_oids(gensec_security,
610 out_mem_ctx, GENSEC_OID_SPNEGO);
612 all_sec = gensec_security_by_oid_list(gensec_security,
616 for (i=0; all_sec && all_sec[i].op; i++) {
617 struct spnego_data spnego_out;
618 const char **send_mech_types;
621 nt_status = gensec_subcontext_start(spnego_state,
623 &spnego_state->sub_sec_security);
624 if (!NT_STATUS_IS_OK(nt_status)) {
627 /* select the sub context */
628 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
630 if (!NT_STATUS_IS_OK(nt_status)) {
631 talloc_free(spnego_state->sub_sec_security);
632 spnego_state->sub_sec_security = NULL;
636 /* In the client, try and produce the first (optimistic) packet */
637 if (spnego_state->state_position == SPNEGO_CLIENT_START) {
638 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
644 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
645 && !NT_STATUS_IS_OK(nt_status)) {
646 const char *next = NULL;
647 const char *principal = NULL;
648 int dbg_level = DBGLVL_WARNING;
650 if (all_sec[i+1].op != NULL) {
651 next = all_sec[i+1].op->name;
652 dbg_level = DBGLVL_NOTICE;
655 if (gensec_security->target.principal != NULL) {
656 principal = gensec_security->target.principal;
657 } else if (gensec_security->target.service != NULL &&
658 gensec_security->target.hostname != NULL)
660 principal = talloc_asprintf(spnego_state->sub_sec_security,
662 gensec_security->target.service,
663 gensec_security->target.hostname);
665 principal = gensec_security->target.hostname;
668 DEBUG(dbg_level, ("SPNEGO(%s) creating NEG_TOKEN_INIT for %s failed (next[%s]): %s\n",
669 spnego_state->sub_sec_security->ops->name,
671 next, nt_errstr(nt_status)));
672 talloc_free(spnego_state->sub_sec_security);
673 spnego_state->sub_sec_security = NULL;
674 /* Pretend we never started it (lets the first run find some incompatible demand) */
680 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
682 send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
685 ok = spnego_write_mech_types(spnego_state,
687 &spnego_state->mech_types);
689 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
690 return NT_STATUS_NO_MEMORY;
693 /* List the remaining mechs as options */
694 spnego_out.negTokenInit.mechTypes = send_mech_types;
695 spnego_out.negTokenInit.reqFlags = null_data_blob;
696 spnego_out.negTokenInit.reqFlagsPadding = 0;
698 if (spnego_state->state_position == SPNEGO_SERVER_START) {
699 spnego_out.negTokenInit.mechListMIC
700 = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
702 spnego_out.negTokenInit.mechListMIC = null_data_blob;
705 spnego_out.negTokenInit.mechToken = unwrapped_out;
707 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
708 DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
709 return NT_STATUS_INVALID_PARAMETER;
713 spnego_state->neg_oid = all_sec[i].oid;
715 if (NT_STATUS_IS_OK(nt_status)) {
716 spnego_state->no_response_expected = true;
719 return NT_STATUS_MORE_PROCESSING_REQUIRED;
721 talloc_free(spnego_state->sub_sec_security);
722 spnego_state->sub_sec_security = NULL;
724 DEBUG(10, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
729 /** create a server negTokenTarg
731 * This is the case, where the client is the first one who sends data
734 static NTSTATUS gensec_spnego_server_negTokenTarg(struct spnego_state *spnego_state,
735 TALLOC_CTX *out_mem_ctx,
737 const DATA_BLOB unwrapped_out,
738 DATA_BLOB mech_list_mic,
741 struct spnego_data spnego_out;
742 DATA_BLOB null_data_blob = data_blob(NULL, 0);
745 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
746 spnego_out.negTokenTarg.responseToken = unwrapped_out;
747 spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
748 spnego_out.negTokenTarg.supportedMech = NULL;
750 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
751 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
752 if (spnego_state->mic_requested) {
753 spnego_out.negTokenTarg.negResult = SPNEGO_REQUEST_MIC;
754 spnego_state->mic_requested = false;
756 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
758 spnego_state->state_position = SPNEGO_SERVER_TARG;
759 } else if (NT_STATUS_IS_OK(nt_status)) {
760 if (unwrapped_out.data) {
761 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
763 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
764 spnego_state->state_position = SPNEGO_DONE;
766 spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
767 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
768 DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
769 spnego_state->state_position = SPNEGO_DONE;
772 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
773 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
774 return NT_STATUS_INVALID_PARAMETER;
777 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
778 spnego_state->num_targs++;
784 static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
785 struct tevent_context *ev,
786 const DATA_BLOB in, DATA_BLOB *out)
788 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
789 DATA_BLOB null_data_blob = data_blob(NULL, 0);
790 DATA_BLOB mech_list_mic = data_blob(NULL, 0);
791 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
792 struct spnego_data spnego_out;
793 struct spnego_data spnego;
797 *out = data_blob(NULL, 0);
800 out_mem_ctx = spnego_state;
803 /* and switch into the state machine */
805 switch (spnego_state->state_position) {
806 case SPNEGO_FALLBACK:
807 return gensec_update_ev(spnego_state->sub_sec_security, ev,
808 out_mem_ctx, in, out);
809 case SPNEGO_SERVER_START:
814 len = spnego_read_data(gensec_security, in, &spnego);
816 return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
817 ev, out_mem_ctx, in, out);
819 /* client sent NegTargetInit, we send NegTokenTarg */
821 /* OK, so it's real SPNEGO, check the packet's the one we expect */
822 if (spnego.type != spnego_state->expected_packet) {
823 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
824 spnego_state->expected_packet));
825 dump_data(1, in.data, in.length);
826 spnego_free_data(&spnego);
827 return NT_STATUS_INVALID_PARAMETER;
830 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
834 spnego.negTokenInit.mechTypes,
835 spnego.negTokenInit.mechToken,
838 if (spnego_state->simulate_w2k) {
840 * Windows 2000 returns the unwrapped token
841 * also in the mech_list_mic field.
843 * In order to verify our client code,
844 * we need a way to have a server with this
847 mech_list_mic = unwrapped_out;
850 nt_status = gensec_spnego_server_negTokenTarg(spnego_state,
857 spnego_free_data(&spnego);
861 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
862 out_mem_ctx, ev, in, out);
863 spnego_state->state_position = SPNEGO_SERVER_START;
864 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
869 case SPNEGO_CLIENT_START:
871 /* The server offers a list of mechanisms */
873 const char *my_mechs[] = {NULL, NULL};
874 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
878 /* client to produce negTokenInit */
879 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
880 out_mem_ctx, ev, in, out);
881 spnego_state->state_position = SPNEGO_CLIENT_TARG;
882 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
886 len = spnego_read_data(gensec_security, in, &spnego);
889 DEBUG(1, ("Invalid SPNEGO request:\n"));
890 dump_data(1, in.data, in.length);
891 return NT_STATUS_INVALID_PARAMETER;
894 /* OK, so it's real SPNEGO, check the packet's the one we expect */
895 if (spnego.type != spnego_state->expected_packet) {
896 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
897 spnego_state->expected_packet));
898 dump_data(1, in.data, in.length);
899 spnego_free_data(&spnego);
900 return NT_STATUS_INVALID_PARAMETER;
903 if (spnego.negTokenInit.targetPrincipal
904 && strcmp(spnego.negTokenInit.targetPrincipal, ADS_IGNORE_PRINCIPAL) != 0) {
905 DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
906 if (lpcfg_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
907 gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
911 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
915 spnego.negTokenInit.mechTypes,
916 spnego.negTokenInit.mechToken,
919 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
920 spnego_free_data(&spnego);
924 my_mechs[0] = spnego_state->neg_oid;
926 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
927 spnego_out.negTokenInit.mechTypes = my_mechs;
928 spnego_out.negTokenInit.reqFlags = null_data_blob;
929 spnego_out.negTokenInit.reqFlagsPadding = 0;
930 spnego_out.negTokenInit.mechListMIC = null_data_blob;
931 spnego_out.negTokenInit.mechToken = unwrapped_out;
933 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
934 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
935 return NT_STATUS_INVALID_PARAMETER;
938 ok = spnego_write_mech_types(spnego_state,
940 &spnego_state->mech_types);
942 DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
943 return NT_STATUS_NO_MEMORY;
947 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
948 spnego_state->state_position = SPNEGO_CLIENT_TARG;
950 if (NT_STATUS_IS_OK(nt_status)) {
951 spnego_state->no_response_expected = true;
954 spnego_free_data(&spnego);
955 return NT_STATUS_MORE_PROCESSING_REQUIRED;
957 case SPNEGO_SERVER_TARG:
960 bool have_sign = true;
961 bool new_spnego = false;
964 return NT_STATUS_INVALID_PARAMETER;
967 len = spnego_read_data(gensec_security, in, &spnego);
970 DEBUG(1, ("Invalid SPNEGO request:\n"));
971 dump_data(1, in.data, in.length);
972 return NT_STATUS_INVALID_PARAMETER;
975 /* OK, so it's real SPNEGO, check the packet's the one we expect */
976 if (spnego.type != spnego_state->expected_packet) {
977 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
978 spnego_state->expected_packet));
979 dump_data(1, in.data, in.length);
980 spnego_free_data(&spnego);
981 return NT_STATUS_INVALID_PARAMETER;
984 spnego_state->num_targs++;
986 if (!spnego_state->sub_sec_security) {
987 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
988 spnego_free_data(&spnego);
989 return NT_STATUS_INVALID_PARAMETER;
992 if (spnego_state->needs_mic_check) {
993 if (spnego.negTokenTarg.responseToken.length != 0) {
994 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
995 spnego_free_data(&spnego);
996 return NT_STATUS_INVALID_PARAMETER;
999 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1000 spnego_state->mech_types.data,
1001 spnego_state->mech_types.length,
1002 spnego_state->mech_types.data,
1003 spnego_state->mech_types.length,
1004 &spnego.negTokenTarg.mechListMIC);
1005 if (NT_STATUS_IS_OK(nt_status)) {
1006 spnego_state->needs_mic_check = false;
1007 spnego_state->done_mic_check = true;
1009 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1010 nt_errstr(nt_status)));
1012 goto server_response;
1015 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
1017 spnego.negTokenTarg.responseToken,
1019 if (!NT_STATUS_IS_OK(nt_status)) {
1020 goto server_response;
1023 have_sign = gensec_have_feature(spnego_state->sub_sec_security,
1024 GENSEC_FEATURE_SIGN);
1025 if (spnego_state->simulate_w2k) {
1028 new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
1029 GENSEC_FEATURE_NEW_SPNEGO);
1030 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1034 if (have_sign && new_spnego) {
1035 spnego_state->needs_mic_check = true;
1036 spnego_state->needs_mic_sign = true;
1039 if (have_sign && spnego.negTokenTarg.mechListMIC.length > 0) {
1040 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1041 spnego_state->mech_types.data,
1042 spnego_state->mech_types.length,
1043 spnego_state->mech_types.data,
1044 spnego_state->mech_types.length,
1045 &spnego.negTokenTarg.mechListMIC);
1046 if (!NT_STATUS_IS_OK(nt_status)) {
1047 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1048 nt_errstr(nt_status)));
1049 goto server_response;
1052 spnego_state->needs_mic_check = false;
1053 spnego_state->done_mic_check = true;
1056 if (spnego_state->needs_mic_sign) {
1057 nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
1059 spnego_state->mech_types.data,
1060 spnego_state->mech_types.length,
1061 spnego_state->mech_types.data,
1062 spnego_state->mech_types.length,
1064 if (!NT_STATUS_IS_OK(nt_status)) {
1065 DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
1066 nt_errstr(nt_status)));
1067 goto server_response;
1069 spnego_state->needs_mic_sign = false;
1072 if (spnego_state->needs_mic_check) {
1073 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1077 nt_status = gensec_spnego_server_negTokenTarg(spnego_state,
1084 spnego_free_data(&spnego);
1088 case SPNEGO_CLIENT_TARG:
1090 NTSTATUS nt_status = NT_STATUS_INTERNAL_ERROR;
1093 return NT_STATUS_INVALID_PARAMETER;
1096 len = spnego_read_data(gensec_security, in, &spnego);
1099 DEBUG(1, ("Invalid SPNEGO request:\n"));
1100 dump_data(1, in.data, in.length);
1101 return NT_STATUS_INVALID_PARAMETER;
1104 /* OK, so it's real SPNEGO, check the packet's the one we expect */
1105 if (spnego.type != spnego_state->expected_packet) {
1106 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
1107 spnego_state->expected_packet));
1108 dump_data(1, in.data, in.length);
1109 spnego_free_data(&spnego);
1110 return NT_STATUS_INVALID_PARAMETER;
1113 spnego_state->num_targs++;
1115 if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
1116 spnego_free_data(&spnego);
1117 return NT_STATUS_LOGON_FAILURE;
1120 if (spnego.negTokenTarg.negResult == SPNEGO_REQUEST_MIC) {
1121 spnego_state->mic_requested = true;
1124 /* Server didn't like our choice of mech, and chose something else */
1125 if (((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) ||
1126 (spnego.negTokenTarg.negResult == SPNEGO_REQUEST_MIC)) &&
1127 spnego.negTokenTarg.supportedMech &&
1128 strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
1129 DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
1130 gensec_get_name_by_oid(gensec_security, spnego_state->neg_oid),
1131 gensec_get_name_by_oid(gensec_security, spnego.negTokenTarg.supportedMech)));
1132 spnego_state->downgraded = true;
1133 spnego_state->no_response_expected = false;
1134 talloc_free(spnego_state->sub_sec_security);
1135 nt_status = gensec_subcontext_start(spnego_state,
1137 &spnego_state->sub_sec_security);
1138 if (!NT_STATUS_IS_OK(nt_status)) {
1139 spnego_free_data(&spnego);
1142 /* select the sub context */
1143 nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
1144 spnego.negTokenTarg.supportedMech);
1145 if (!NT_STATUS_IS_OK(nt_status)) {
1146 spnego_free_data(&spnego);
1150 spnego_state->neg_oid = talloc_strdup(spnego_state,
1151 spnego.negTokenTarg.supportedMech);
1152 if (spnego_state->neg_oid == NULL) {
1153 spnego_free_data(&spnego);
1154 return NT_STATUS_NO_MEMORY;
1158 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1159 DATA_BLOB *m = &spnego.negTokenTarg.mechListMIC;
1160 const DATA_BLOB *r = &spnego.negTokenTarg.responseToken;
1163 * Windows 2000 has a bug, it repeats the
1164 * responseToken in the mechListMIC field.
1166 if (m->length == r->length) {
1169 cmp = memcmp(m->data, r->data, m->length);
1176 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1177 if (spnego_state->no_response_expected) {
1178 spnego_state->needs_mic_check = true;
1182 if (spnego_state->needs_mic_check) {
1183 if (spnego.negTokenTarg.responseToken.length != 0) {
1184 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
1185 spnego_free_data(&spnego);
1186 return NT_STATUS_INVALID_PARAMETER;
1189 if (spnego.negTokenTarg.mechListMIC.length == 0
1190 && spnego_state->may_skip_mic_check) {
1192 * In this case we don't require
1193 * a mechListMIC from the server.
1195 * This works around bugs in the Azure
1196 * and Apple spnego implementations.
1199 * https://bugzilla.samba.org/show_bug.cgi?id=11994
1201 spnego_state->needs_mic_check = false;
1202 nt_status = NT_STATUS_OK;
1203 goto client_response;
1206 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1207 spnego_state->mech_types.data,
1208 spnego_state->mech_types.length,
1209 spnego_state->mech_types.data,
1210 spnego_state->mech_types.length,
1211 &spnego.negTokenTarg.mechListMIC);
1212 if (!NT_STATUS_IS_OK(nt_status)) {
1213 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1214 nt_errstr(nt_status)));
1215 spnego_free_data(&spnego);
1218 spnego_state->needs_mic_check = false;
1219 spnego_state->done_mic_check = true;
1220 goto client_response;
1223 if (!spnego_state->no_response_expected) {
1224 nt_status = gensec_update_ev(spnego_state->sub_sec_security,
1226 spnego.negTokenTarg.responseToken,
1228 if (!NT_STATUS_IS_OK(nt_status)) {
1229 goto client_response;
1232 spnego_state->no_response_expected = true;
1234 nt_status = NT_STATUS_OK;
1237 if (spnego_state->no_response_expected &&
1238 !spnego_state->done_mic_check)
1240 bool have_sign = true;
1241 bool new_spnego = false;
1243 have_sign = gensec_have_feature(spnego_state->sub_sec_security,
1244 GENSEC_FEATURE_SIGN);
1245 if (spnego_state->simulate_w2k) {
1248 new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
1249 GENSEC_FEATURE_NEW_SPNEGO);
1251 switch (spnego.negTokenTarg.negResult) {
1252 case SPNEGO_ACCEPT_COMPLETED:
1253 case SPNEGO_NONE_RESULT:
1254 if (spnego_state->num_targs == 1) {
1256 * the first exchange doesn't require
1264 case SPNEGO_ACCEPT_INCOMPLETE:
1265 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1270 if (spnego_state->downgraded) {
1272 * A downgrade should be protected if
1279 * The caller may just asked for
1280 * GENSEC_FEATURE_SESSION_KEY, this
1281 * is only reflected in the want_features.
1284 * gensec_have_features(GENSEC_FEATURE_SIGN)
1287 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
1290 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
1294 * Here we're sure our preferred mech was
1295 * selected by the server and our caller doesn't
1296 * need GENSEC_FEATURE_SIGN nor
1297 * GENSEC_FEATURE_SEAL support.
1299 * In this case we don't require
1300 * a mechListMIC from the server.
1302 * This works around bugs in the Azure
1303 * and Apple spnego implementations.
1306 * https://bugzilla.samba.org/show_bug.cgi?id=11994
1308 spnego_state->may_skip_mic_check = true;
1311 case SPNEGO_REQUEST_MIC:
1312 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1320 if (spnego_state->mic_requested) {
1326 if (have_sign && new_spnego) {
1327 spnego_state->needs_mic_check = true;
1328 spnego_state->needs_mic_sign = true;
1332 if (spnego.negTokenTarg.mechListMIC.length > 0) {
1333 nt_status = gensec_check_packet(spnego_state->sub_sec_security,
1334 spnego_state->mech_types.data,
1335 spnego_state->mech_types.length,
1336 spnego_state->mech_types.data,
1337 spnego_state->mech_types.length,
1338 &spnego.negTokenTarg.mechListMIC);
1339 if (!NT_STATUS_IS_OK(nt_status)) {
1340 DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
1341 nt_errstr(nt_status)));
1342 spnego_free_data(&spnego);
1345 spnego_state->needs_mic_check = false;
1346 spnego_state->done_mic_check = true;
1349 if (spnego_state->needs_mic_sign) {
1350 nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
1352 spnego_state->mech_types.data,
1353 spnego_state->mech_types.length,
1354 spnego_state->mech_types.data,
1355 spnego_state->mech_types.length,
1357 if (!NT_STATUS_IS_OK(nt_status)) {
1358 DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
1359 nt_errstr(nt_status)));
1360 spnego_free_data(&spnego);
1363 spnego_state->needs_mic_sign = false;
1366 if (spnego_state->needs_mic_check) {
1367 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1371 spnego_free_data(&spnego);
1373 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
1374 && !NT_STATUS_IS_OK(nt_status)) {
1375 DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
1376 spnego_state->sub_sec_security->ops->name,
1377 nt_errstr(nt_status)));
1381 if (unwrapped_out.length || mech_list_mic.length) {
1383 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
1384 spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
1385 spnego_out.negTokenTarg.supportedMech = NULL;
1386 spnego_out.negTokenTarg.responseToken = unwrapped_out;
1387 spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
1389 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
1390 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
1391 return NT_STATUS_INVALID_PARAMETER;
1394 spnego_state->num_targs++;
1395 spnego_state->state_position = SPNEGO_CLIENT_TARG;
1396 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
1399 /* all done - server has accepted, and we agree */
1400 *out = null_data_blob;
1402 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
1403 /* unless of course it did not accept */
1404 DEBUG(1,("gensec_update ok but not accepted\n"));
1405 nt_status = NT_STATUS_INVALID_PARAMETER;
1408 spnego_state->state_position = SPNEGO_DONE;
1414 /* We should not be called after we are 'done' */
1415 return NT_STATUS_INVALID_PARAMETER;
1417 return NT_STATUS_INVALID_PARAMETER;
1420 static NTSTATUS gensec_spnego_update_in(struct gensec_security *gensec_security,
1421 const DATA_BLOB in, DATA_BLOB *full_in)
1423 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1427 *full_in = data_blob_null;
1429 if (spnego_state->in_needed == 0) {
1434 * try to work out the size of the full
1435 * input token, it might be fragmented
1437 ret = asn1_peek_full_tag(in, ASN1_APPLICATION(0), &size);
1438 if ((ret != 0) && (ret != EAGAIN)) {
1439 ret = asn1_peek_full_tag(in, ASN1_CONTEXT(1), &size);
1442 if ((ret == 0) || (ret == EAGAIN)) {
1443 spnego_state->in_needed = size;
1446 * If it is not an asn1 message
1447 * just call the next layer.
1449 spnego_state->in_needed = in.length;
1453 if (spnego_state->in_needed > UINT16_MAX) {
1455 * limit the incoming message to 0xFFFF
1456 * to avoid DoS attacks.
1458 return NT_STATUS_INVALID_BUFFER_SIZE;
1461 if ((spnego_state->in_needed > 0) && (in.length == 0)) {
1463 * If we reach this, we know we got at least
1464 * part of an asn1 message, getting 0 means
1465 * the remote peer wants us to spin.
1467 return NT_STATUS_INVALID_PARAMETER;
1470 expected = spnego_state->in_needed - spnego_state->in_frag.length;
1471 if (in.length > expected) {
1473 * we got more than expected
1475 return NT_STATUS_INVALID_PARAMETER;
1478 if (in.length == spnego_state->in_needed) {
1480 * if the in.length contains the full blob
1483 * Note: this implies spnego_state->in_frag.length == 0,
1484 * but we do not need to check this explicitly
1485 * because we already know that we did not get
1486 * more than expected.
1489 return NT_STATUS_OK;
1492 ok = data_blob_append(spnego_state, &spnego_state->in_frag,
1493 in.data, in.length);
1495 return NT_STATUS_NO_MEMORY;
1498 if (spnego_state->in_needed > spnego_state->in_frag.length) {
1499 return NT_STATUS_MORE_PROCESSING_REQUIRED;
1502 *full_in = spnego_state->in_frag;
1503 return NT_STATUS_OK;
1506 static NTSTATUS gensec_spnego_update_out(struct gensec_security *gensec_security,
1507 TALLOC_CTX *out_mem_ctx,
1510 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1511 DATA_BLOB out = data_blob_null;
1514 *_out = data_blob_null;
1516 if (spnego_state->out_frag.length == 0) {
1517 return spnego_state->out_status;
1521 * There is still more data to be delivered
1522 * to the remote peer.
1525 if (spnego_state->out_frag.length <= spnego_state->out_max_length) {
1527 * Fast path, we can deliver everything
1530 *_out = spnego_state->out_frag;
1531 talloc_steal(out_mem_ctx, _out->data);
1532 spnego_state->out_frag = data_blob_null;
1533 return spnego_state->out_status;
1536 out = spnego_state->out_frag;
1539 * copy the remaining bytes
1541 spnego_state->out_frag = data_blob_talloc(spnego_state,
1542 out.data + spnego_state->out_max_length,
1543 out.length - spnego_state->out_max_length);
1544 if (spnego_state->out_frag.data == NULL) {
1545 return NT_STATUS_NO_MEMORY;
1549 * truncate the buffer
1551 ok = data_blob_realloc(spnego_state, &out,
1552 spnego_state->out_max_length);
1554 return NT_STATUS_NO_MEMORY;
1557 talloc_steal(out_mem_ctx, out.data);
1559 return NT_STATUS_MORE_PROCESSING_REQUIRED;
1562 static NTSTATUS gensec_spnego_update_wrapper(struct gensec_security *gensec_security,
1563 TALLOC_CTX *out_mem_ctx,
1564 struct tevent_context *ev,
1565 const DATA_BLOB in, DATA_BLOB *out)
1567 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1568 DATA_BLOB full_in = data_blob_null;
1571 *out = data_blob_null;
1573 if (spnego_state->out_frag.length > 0) {
1574 if (in.length > 0) {
1575 return NT_STATUS_INVALID_PARAMETER;
1578 return gensec_spnego_update_out(gensec_security,
1583 status = gensec_spnego_update_in(gensec_security,
1585 if (!NT_STATUS_IS_OK(status)) {
1589 status = gensec_spnego_update(gensec_security,
1592 &spnego_state->out_frag);
1593 data_blob_free(&spnego_state->in_frag);
1594 spnego_state->in_needed = 0;
1595 if (NT_STATUS_IS_OK(status)) {
1596 bool reset_full = true;
1598 gensec_security->child_security = spnego_state->sub_sec_security;
1600 reset_full = !spnego_state->done_mic_check;
1602 status = gensec_may_reset_crypto(spnego_state->sub_sec_security,
1605 if (!NT_STATUS_IS_OK(status) &&
1606 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1610 spnego_state->out_status = status;
1612 return gensec_spnego_update_out(gensec_security,
1617 static void gensec_spnego_want_feature(struct gensec_security *gensec_security,
1620 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1622 gensec_security->want_features |= feature;
1623 if (!spnego_state || !spnego_state->sub_sec_security) {
1627 gensec_want_feature(spnego_state->sub_sec_security,
1631 static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
1634 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1635 if (!spnego_state->sub_sec_security) {
1639 return gensec_have_feature(spnego_state->sub_sec_security,
1643 static NTTIME gensec_spnego_expire_time(struct gensec_security *gensec_security)
1645 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1647 if (!spnego_state->sub_sec_security) {
1648 return GENSEC_EXPIRE_TIME_INFINITY;
1651 return gensec_expire_time(spnego_state->sub_sec_security);
1654 static const char *gensec_spnego_final_auth_type(struct gensec_security *gensec_security)
1656 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1658 if (!spnego_state->sub_sec_security) {
1661 return gensec_final_auth_type(spnego_state->sub_sec_security);
1665 static const char *gensec_spnego_oids[] = {
1670 static const struct gensec_security_ops gensec_spnego_security_ops = {
1672 .sasl_name = "GSS-SPNEGO",
1673 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1674 .oid = gensec_spnego_oids,
1675 .client_start = gensec_spnego_client_start,
1676 .server_start = gensec_spnego_server_start,
1677 .update = gensec_spnego_update_wrapper,
1678 .seal_packet = gensec_spnego_seal_packet,
1679 .sign_packet = gensec_spnego_sign_packet,
1680 .sig_size = gensec_spnego_sig_size,
1681 .max_wrapped_size = gensec_spnego_max_wrapped_size,
1682 .max_input_size = gensec_spnego_max_input_size,
1683 .check_packet = gensec_spnego_check_packet,
1684 .unseal_packet = gensec_spnego_unseal_packet,
1685 .wrap = gensec_spnego_wrap,
1686 .unwrap = gensec_spnego_unwrap,
1687 .session_key = gensec_spnego_session_key,
1688 .session_info = gensec_spnego_session_info,
1689 .want_feature = gensec_spnego_want_feature,
1690 .have_feature = gensec_spnego_have_feature,
1691 .expire_time = gensec_spnego_expire_time,
1692 .final_auth_type = gensec_spnego_final_auth_type,
1694 .priority = GENSEC_SPNEGO
1697 _PUBLIC_ NTSTATUS gensec_spnego_init(TALLOC_CTX *ctx)
1700 ret = gensec_register(&gensec_spnego_security_ops);
1701 if (!NT_STATUS_IS_OK(ret)) {
1702 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1703 gensec_spnego_security_ops.name));