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
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "auth/gensec/spnego.h"
26 #include "librpc/gen_ndr/ndr_dcerpc.h"
27 #include "auth/credentials/credentials.h"
28 #include "auth/gensec/gensec.h"
29 #include "auth/gensec/gensec_proto.h"
31 enum spnego_state_position {
41 enum spnego_message_type expected_packet;
42 enum spnego_state_position state_position;
43 struct gensec_security *sub_sec_security;
44 bool no_response_expected;
50 static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
52 struct spnego_state *spnego_state;
54 spnego_state = talloc(gensec_security, struct spnego_state);
56 return NT_STATUS_NO_MEMORY;
59 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
60 spnego_state->state_position = SPNEGO_CLIENT_START;
61 spnego_state->sub_sec_security = NULL;
62 spnego_state->no_response_expected = false;
64 gensec_security->private_data = spnego_state;
68 static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_security)
70 struct spnego_state *spnego_state;
72 spnego_state = talloc(gensec_security, struct spnego_state);
74 return NT_STATUS_NO_MEMORY;
77 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
78 spnego_state->state_position = SPNEGO_SERVER_START;
79 spnego_state->sub_sec_security = NULL;
80 spnego_state->no_response_expected = false;
82 gensec_security->private_data = spnego_state;
87 wrappers for the spnego_*() functions
89 static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
91 uint8_t *data, size_t length,
92 const uint8_t *whole_pdu, size_t pdu_length,
95 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
97 if (spnego_state->state_position != SPNEGO_DONE
98 && spnego_state->state_position != SPNEGO_FALLBACK) {
99 return NT_STATUS_INVALID_PARAMETER;
102 return gensec_unseal_packet(spnego_state->sub_sec_security,
105 whole_pdu, pdu_length,
109 static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
111 const uint8_t *data, size_t length,
112 const uint8_t *whole_pdu, size_t pdu_length,
113 const DATA_BLOB *sig)
115 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
117 if (spnego_state->state_position != SPNEGO_DONE
118 && spnego_state->state_position != SPNEGO_FALLBACK) {
119 return NT_STATUS_INVALID_PARAMETER;
122 return gensec_check_packet(spnego_state->sub_sec_security,
125 whole_pdu, pdu_length,
129 static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
131 uint8_t *data, size_t length,
132 const uint8_t *whole_pdu, size_t pdu_length,
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_seal_packet(spnego_state->sub_sec_security,
145 whole_pdu, pdu_length,
149 static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
151 const uint8_t *data, size_t length,
152 const uint8_t *whole_pdu, size_t pdu_length,
155 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
157 if (spnego_state->state_position != SPNEGO_DONE
158 && spnego_state->state_position != SPNEGO_FALLBACK) {
159 return NT_STATUS_INVALID_PARAMETER;
162 return gensec_sign_packet(spnego_state->sub_sec_security,
165 whole_pdu, pdu_length,
169 static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
174 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
176 if (spnego_state->state_position != SPNEGO_DONE
177 && spnego_state->state_position != SPNEGO_FALLBACK) {
178 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
179 return NT_STATUS_INVALID_PARAMETER;
182 return gensec_wrap(spnego_state->sub_sec_security,
186 static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
191 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
193 if (spnego_state->state_position != SPNEGO_DONE
194 && spnego_state->state_position != SPNEGO_FALLBACK) {
195 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
196 return NT_STATUS_INVALID_PARAMETER;
199 return gensec_unwrap(spnego_state->sub_sec_security,
203 static NTSTATUS gensec_spnego_wrap_packets(struct gensec_security *gensec_security,
207 size_t *len_processed)
209 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
211 if (spnego_state->state_position != SPNEGO_DONE
212 && spnego_state->state_position != SPNEGO_FALLBACK) {
213 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
214 return NT_STATUS_INVALID_PARAMETER;
217 return gensec_wrap_packets(spnego_state->sub_sec_security,
222 static NTSTATUS gensec_spnego_packet_full_request(struct gensec_security *gensec_security,
223 DATA_BLOB blob, size_t *size)
225 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
227 if (spnego_state->state_position != SPNEGO_DONE
228 && spnego_state->state_position != SPNEGO_FALLBACK) {
229 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
230 return NT_STATUS_INVALID_PARAMETER;
233 return gensec_packet_full_request(spnego_state->sub_sec_security,
237 static NTSTATUS gensec_spnego_unwrap_packets(struct gensec_security *gensec_security,
241 size_t *len_processed)
243 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
245 if (spnego_state->state_position != SPNEGO_DONE
246 && spnego_state->state_position != SPNEGO_FALLBACK) {
247 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
248 return NT_STATUS_INVALID_PARAMETER;
251 return gensec_unwrap_packets(spnego_state->sub_sec_security,
256 static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
258 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
260 if (spnego_state->state_position != SPNEGO_DONE
261 && spnego_state->state_position != SPNEGO_FALLBACK) {
265 return gensec_sig_size(spnego_state->sub_sec_security, data_size);
268 static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
270 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
272 if (spnego_state->state_position != SPNEGO_DONE
273 && spnego_state->state_position != SPNEGO_FALLBACK) {
277 return gensec_max_input_size(spnego_state->sub_sec_security);
280 static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
282 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
284 if (spnego_state->state_position != SPNEGO_DONE
285 && spnego_state->state_position != SPNEGO_FALLBACK) {
289 return gensec_max_wrapped_size(spnego_state->sub_sec_security);
292 static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
293 DATA_BLOB *session_key)
295 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
296 if (!spnego_state->sub_sec_security) {
297 return NT_STATUS_INVALID_PARAMETER;
300 return gensec_session_key(spnego_state->sub_sec_security,
304 static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
305 struct auth_session_info **session_info)
307 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
308 if (!spnego_state->sub_sec_security) {
309 return NT_STATUS_INVALID_PARAMETER;
312 return gensec_session_info(spnego_state->sub_sec_security,
316 /** Fallback to another GENSEC mechanism, based on magic strings
318 * This is the 'fallback' case, where we don't get SPNEGO, and have to
319 * try all the other options (and hope they all have a magic string
323 static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
324 struct spnego_state *spnego_state,
325 TALLOC_CTX *out_mem_ctx,
326 const DATA_BLOB in, DATA_BLOB *out)
329 struct gensec_security_ops **all_ops
330 = gensec_security_mechs(gensec_security, out_mem_ctx);
331 for (i=0; all_ops[i]; i++) {
334 if (!all_ops[i]->oid) {
339 for (j=0; all_ops[i]->oid[j]; j++) {
340 if (strcasecmp(GENSEC_OID_SPNEGO,all_ops[i]->oid[j]) == 0) {
348 if (!all_ops[i]->magic) {
352 nt_status = all_ops[i]->magic(gensec_security, &in);
353 if (!NT_STATUS_IS_OK(nt_status)) {
357 spnego_state->state_position = SPNEGO_FALLBACK;
359 nt_status = gensec_subcontext_start(spnego_state,
361 &spnego_state->sub_sec_security);
363 if (!NT_STATUS_IS_OK(nt_status)) {
366 /* select the sub context */
367 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
369 if (!NT_STATUS_IS_OK(nt_status)) {
372 nt_status = gensec_update(spnego_state->sub_sec_security,
373 out_mem_ctx, in, out);
376 DEBUG(1, ("Failed to parse SPNEGO request\n"));
377 return NT_STATUS_INVALID_PARAMETER;
382 Parse the netTokenInit, either from the client, to the server, or
383 from the server to the client.
386 static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
387 struct spnego_state *spnego_state,
388 TALLOC_CTX *out_mem_ctx,
389 const char **mechType,
390 const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
393 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
394 DATA_BLOB null_data_blob = data_blob(NULL,0);
396 const struct gensec_security_ops_wrapper *all_sec
397 = gensec_security_by_oid_list(gensec_security,
401 if (spnego_state->state_position == SPNEGO_SERVER_START) {
402 for (i=0; all_sec && all_sec[i].op; i++) {
403 /* optomisitic token */
404 if (strcmp(all_sec[i].oid, mechType[0]) == 0) {
405 nt_status = gensec_subcontext_start(spnego_state,
407 &spnego_state->sub_sec_security);
408 if (!NT_STATUS_IS_OK(nt_status)) {
411 /* select the sub context */
412 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
414 if (!NT_STATUS_IS_OK(nt_status)) {
415 talloc_free(spnego_state->sub_sec_security);
416 spnego_state->sub_sec_security = NULL;
420 nt_status = gensec_update(spnego_state->sub_sec_security,
424 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
425 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
426 /* Pretend we never started it (lets the first run find some incompatible demand) */
428 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
429 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
430 talloc_free(spnego_state->sub_sec_security);
431 spnego_state->sub_sec_security = NULL;
435 spnego_state->neg_oid = all_sec[i].oid;
441 /* Having tried any optomisitc token from the client (if we
442 * were the server), if we didn't get anywhere, walk our list
443 * in our preference order */
445 if (!spnego_state->sub_sec_security) {
446 for (i=0; all_sec && all_sec[i].op; i++) {
447 nt_status = gensec_subcontext_start(spnego_state,
449 &spnego_state->sub_sec_security);
450 if (!NT_STATUS_IS_OK(nt_status)) {
453 /* select the sub context */
454 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
456 if (!NT_STATUS_IS_OK(nt_status)) {
457 talloc_free(spnego_state->sub_sec_security);
458 spnego_state->sub_sec_security = NULL;
462 spnego_state->neg_oid = all_sec[i].oid;
464 /* only get the helping start blob for the first OID */
465 nt_status = gensec_update(spnego_state->sub_sec_security,
470 /* it is likely that a NULL input token will
471 * not be liked by most server mechs, but if
472 * we are in the client, we want the first
473 * update packet to be able to abort the use
475 if (spnego_state->state_position != SPNEGO_SERVER_START) {
476 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
477 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
478 /* Pretend we never started it (lets the first run find some incompatible demand) */
480 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse: %s\n",
481 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
482 talloc_free(spnego_state->sub_sec_security);
483 spnego_state->sub_sec_security = NULL;
492 if (spnego_state->sub_sec_security) {
493 /* it is likely that a NULL input token will
494 * not be liked by most server mechs, but this
495 * does the right thing in the CIFS client.
496 * just push us along the merry-go-round
497 * again, and hope for better luck next
500 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
501 *unwrapped_out = data_blob(NULL, 0);
502 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
505 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
506 && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
507 && !NT_STATUS_IS_OK(nt_status)) {
508 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
509 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
510 talloc_free(spnego_state->sub_sec_security);
511 spnego_state->sub_sec_security = NULL;
513 /* We started the mech correctly, and the
514 * input from the other side was valid.
515 * Return the error (say bad password, invalid
521 return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
524 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
525 /* we could re-negotiate here, but it would only work
526 * if the client or server lied about what it could
527 * support the first time. Lets keep this code to
533 /** create a negTokenInit
535 * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
537 static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
538 struct spnego_state *spnego_state,
539 TALLOC_CTX *out_mem_ctx,
540 const DATA_BLOB in, DATA_BLOB *out)
543 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
544 DATA_BLOB null_data_blob = data_blob(NULL,0);
545 const char **mechTypes = NULL;
546 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
547 const struct gensec_security_ops_wrapper *all_sec;
548 const char *principal = NULL;
550 mechTypes = gensec_security_oids(gensec_security,
551 out_mem_ctx, GENSEC_OID_SPNEGO);
553 all_sec = gensec_security_by_oid_list(gensec_security,
557 for (i=0; all_sec && all_sec[i].op; i++) {
558 struct spnego_data spnego_out;
559 nt_status = gensec_subcontext_start(spnego_state,
561 &spnego_state->sub_sec_security);
562 if (!NT_STATUS_IS_OK(nt_status)) {
565 /* select the sub context */
566 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
568 if (!NT_STATUS_IS_OK(nt_status)) {
569 talloc_free(spnego_state->sub_sec_security);
570 spnego_state->sub_sec_security = NULL;
574 /* In the client, try and produce the first (optimistic) packet */
575 if (spnego_state->state_position == SPNEGO_CLIENT_START) {
576 nt_status = gensec_update(spnego_state->sub_sec_security,
581 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
582 && !NT_STATUS_IS_OK(nt_status)) {
583 DEBUG(1, ("SPNEGO(%s) creating NEG_TOKEN_INIT failed: %s\n",
584 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
585 talloc_free(spnego_state->sub_sec_security);
586 spnego_state->sub_sec_security = NULL;
587 /* Pretend we never started it (lets the first run find some incompatible demand) */
593 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
595 /* List the remaining mechs as options */
596 spnego_out.negTokenInit.mechTypes = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
598 spnego_out.negTokenInit.reqFlags = 0;
600 if (spnego_state->state_position == SPNEGO_SERVER_START) {
601 /* server credentials */
602 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
604 principal = cli_credentials_get_principal(creds, out_mem_ctx);
608 spnego_out.negTokenInit.mechListMIC
609 = data_blob_string_const(principal);
611 spnego_out.negTokenInit.mechListMIC = null_data_blob;
614 spnego_out.negTokenInit.mechToken = unwrapped_out;
616 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
617 DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
618 return NT_STATUS_INVALID_PARAMETER;
622 spnego_state->neg_oid = all_sec[i].oid;
624 if (NT_STATUS_IS_OK(nt_status)) {
625 spnego_state->no_response_expected = true;
628 return NT_STATUS_MORE_PROCESSING_REQUIRED;
630 talloc_free(spnego_state->sub_sec_security);
631 spnego_state->sub_sec_security = NULL;
633 DEBUG(1, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
634 return NT_STATUS_INVALID_PARAMETER;
638 /** create a server negTokenTarg
640 * This is the case, where the client is the first one who sends data
643 static NTSTATUS gensec_spnego_server_negTokenTarg(struct gensec_security *gensec_security,
644 struct spnego_state *spnego_state,
645 TALLOC_CTX *out_mem_ctx,
647 const DATA_BLOB unwrapped_out, DATA_BLOB *out)
649 struct spnego_data spnego_out;
650 DATA_BLOB null_data_blob = data_blob(NULL, 0);
653 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
654 spnego_out.negTokenTarg.responseToken = unwrapped_out;
655 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
656 spnego_out.negTokenTarg.supportedMech = NULL;
658 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
659 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
660 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
661 spnego_state->state_position = SPNEGO_SERVER_TARG;
662 } else if (NT_STATUS_IS_OK(nt_status)) {
663 if (unwrapped_out.data) {
664 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
666 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
667 spnego_state->state_position = SPNEGO_DONE;
669 spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
670 DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
671 spnego_state->state_position = SPNEGO_DONE;
674 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
675 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
676 return NT_STATUS_INVALID_PARAMETER;
679 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
685 static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
686 const DATA_BLOB in, DATA_BLOB *out)
688 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
689 DATA_BLOB null_data_blob = data_blob(NULL, 0);
690 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
691 struct spnego_data spnego_out;
692 struct spnego_data spnego;
696 *out = data_blob(NULL, 0);
699 out_mem_ctx = spnego_state;
702 /* and switch into the state machine */
704 switch (spnego_state->state_position) {
705 case SPNEGO_FALLBACK:
706 return gensec_update(spnego_state->sub_sec_security,
707 out_mem_ctx, in, out);
708 case SPNEGO_SERVER_START:
713 len = spnego_read_data(gensec_security, in, &spnego);
715 return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
716 out_mem_ctx, in, out);
718 /* client sent NegTargetInit, we send NegTokenTarg */
720 /* OK, so it's real SPNEGO, check the packet's the one we expect */
721 if (spnego.type != spnego_state->expected_packet) {
722 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
723 spnego_state->expected_packet));
724 dump_data(1, in.data, in.length);
725 spnego_free_data(&spnego);
726 return NT_STATUS_INVALID_PARAMETER;
729 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
732 spnego.negTokenInit.mechTypes,
733 spnego.negTokenInit.mechToken,
736 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
743 spnego_free_data(&spnego);
747 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
748 out_mem_ctx, in, out);
749 spnego_state->state_position = SPNEGO_SERVER_START;
750 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
755 case SPNEGO_CLIENT_START:
757 /* The server offers a list of mechanisms */
759 const char *my_mechs[] = {NULL, NULL};
760 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
763 /* client to produce negTokenInit */
764 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
765 out_mem_ctx, in, out);
766 spnego_state->state_position = SPNEGO_CLIENT_TARG;
767 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
771 len = spnego_read_data(gensec_security, in, &spnego);
774 DEBUG(1, ("Invalid SPNEGO request:\n"));
775 dump_data(1, in.data, in.length);
776 return NT_STATUS_INVALID_PARAMETER;
779 /* OK, so it's real SPNEGO, check the packet's the one we expect */
780 if (spnego.type != spnego_state->expected_packet) {
781 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
782 spnego_state->expected_packet));
783 dump_data(1, in.data, in.length);
784 spnego_free_data(&spnego);
785 return NT_STATUS_INVALID_PARAMETER;
788 if (spnego.negTokenInit.targetPrincipal) {
789 DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
790 gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
793 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
796 spnego.negTokenInit.mechTypes,
797 spnego.negTokenInit.mechToken,
800 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
801 spnego_free_data(&spnego);
805 my_mechs[0] = spnego_state->neg_oid;
807 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
808 spnego_out.negTokenInit.mechTypes = my_mechs;
809 spnego_out.negTokenInit.reqFlags = 0;
810 spnego_out.negTokenInit.mechListMIC = null_data_blob;
811 spnego_out.negTokenInit.mechToken = unwrapped_out;
813 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
814 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
815 return NT_STATUS_INVALID_PARAMETER;
819 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
820 spnego_state->state_position = SPNEGO_CLIENT_TARG;
822 if (NT_STATUS_IS_OK(nt_status)) {
823 spnego_state->no_response_expected = true;
826 spnego_free_data(&spnego);
827 return NT_STATUS_MORE_PROCESSING_REQUIRED;
829 case SPNEGO_SERVER_TARG:
833 return NT_STATUS_INVALID_PARAMETER;
836 len = spnego_read_data(gensec_security, in, &spnego);
839 DEBUG(1, ("Invalid SPNEGO request:\n"));
840 dump_data(1, in.data, in.length);
841 return NT_STATUS_INVALID_PARAMETER;
844 /* OK, so it's real SPNEGO, check the packet's the one we expect */
845 if (spnego.type != spnego_state->expected_packet) {
846 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
847 spnego_state->expected_packet));
848 dump_data(1, in.data, in.length);
849 spnego_free_data(&spnego);
850 return NT_STATUS_INVALID_PARAMETER;
853 if (!spnego_state->sub_sec_security) {
854 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
855 spnego_free_data(&spnego);
856 return NT_STATUS_INVALID_PARAMETER;
859 nt_status = gensec_update(spnego_state->sub_sec_security,
861 spnego.negTokenTarg.responseToken,
864 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
871 spnego_free_data(&spnego);
875 case SPNEGO_CLIENT_TARG:
879 return NT_STATUS_INVALID_PARAMETER;
882 len = spnego_read_data(gensec_security, in, &spnego);
885 DEBUG(1, ("Invalid SPNEGO request:\n"));
886 dump_data(1, in.data, in.length);
887 return NT_STATUS_INVALID_PARAMETER;
890 /* OK, so it's real SPNEGO, check the packet's the one we expect */
891 if (spnego.type != spnego_state->expected_packet) {
892 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
893 spnego_state->expected_packet));
894 dump_data(1, in.data, in.length);
895 spnego_free_data(&spnego);
896 return NT_STATUS_INVALID_PARAMETER;
899 if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
900 spnego_free_data(&spnego);
901 return NT_STATUS_ACCESS_DENIED;
904 /* Server didn't like our choice of mech, and chose something else */
905 if ((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) &&
906 spnego.negTokenTarg.supportedMech &&
907 strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
908 DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
909 gensec_get_name_by_oid(spnego.negTokenTarg.supportedMech),
910 gensec_get_name_by_oid(spnego_state->neg_oid)));
912 talloc_free(spnego_state->sub_sec_security);
913 nt_status = gensec_subcontext_start(spnego_state,
915 &spnego_state->sub_sec_security);
916 if (!NT_STATUS_IS_OK(nt_status)) {
917 spnego_free_data(&spnego);
920 /* select the sub context */
921 nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
922 spnego.negTokenTarg.supportedMech);
923 if (!NT_STATUS_IS_OK(nt_status)) {
924 spnego_free_data(&spnego);
928 nt_status = gensec_update(spnego_state->sub_sec_security,
930 spnego.negTokenTarg.responseToken,
932 spnego_state->neg_oid = talloc_strdup(spnego_state, spnego.negTokenTarg.supportedMech);
933 } else if (spnego_state->no_response_expected) {
934 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
935 DEBUG(3,("GENSEC SPNEGO: client GENSEC accepted, but server rejected (bad password?)\n"));
936 nt_status = NT_STATUS_INVALID_PARAMETER;
937 } else if (spnego.negTokenTarg.responseToken.length) {
938 DEBUG(2,("GENSEC SPNEGO: client GENSEC accepted, but server continued negotiation!\n"));
939 nt_status = NT_STATUS_INVALID_PARAMETER;
941 nt_status = NT_STATUS_OK;
944 nt_status = gensec_update(spnego_state->sub_sec_security,
946 spnego.negTokenTarg.responseToken,
949 if (NT_STATUS_IS_OK(nt_status)) {
950 spnego_state->no_response_expected = true;
954 spnego_free_data(&spnego);
956 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
957 && !NT_STATUS_IS_OK(nt_status)) {
958 DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
959 spnego_state->sub_sec_security->ops->name,
960 nt_errstr(nt_status)));
964 if (unwrapped_out.length) {
966 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
967 spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
968 spnego_out.negTokenTarg.supportedMech = NULL;
969 spnego_out.negTokenTarg.responseToken = unwrapped_out;
970 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
972 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
973 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
974 return NT_STATUS_INVALID_PARAMETER;
977 spnego_state->state_position = SPNEGO_CLIENT_TARG;
978 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
981 /* all done - server has accepted, and we agree */
982 *out = null_data_blob;
984 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
985 /* unless of course it did not accept */
986 DEBUG(1,("gensec_update ok but not accepted\n"));
987 nt_status = NT_STATUS_INVALID_PARAMETER;
990 spnego_state->state_position = SPNEGO_DONE;
996 /* We should not be called after we are 'done' */
997 return NT_STATUS_INVALID_PARAMETER;
999 return NT_STATUS_INVALID_PARAMETER;
1002 static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
1005 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1006 if (!spnego_state->sub_sec_security) {
1010 return gensec_have_feature(spnego_state->sub_sec_security,
1014 static const char *gensec_spnego_oids[] = {
1019 static const struct gensec_security_ops gensec_spnego_security_ops = {
1021 .sasl_name = "GSS-SPNEGO",
1022 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1023 .oid = gensec_spnego_oids,
1024 .client_start = gensec_spnego_client_start,
1025 .server_start = gensec_spnego_server_start,
1026 .update = gensec_spnego_update,
1027 .seal_packet = gensec_spnego_seal_packet,
1028 .sign_packet = gensec_spnego_sign_packet,
1029 .sig_size = gensec_spnego_sig_size,
1030 .max_wrapped_size = gensec_spnego_max_wrapped_size,
1031 .max_input_size = gensec_spnego_max_input_size,
1032 .check_packet = gensec_spnego_check_packet,
1033 .unseal_packet = gensec_spnego_unseal_packet,
1034 .packet_full_request = gensec_spnego_packet_full_request,
1035 .wrap = gensec_spnego_wrap,
1036 .unwrap = gensec_spnego_unwrap,
1037 .wrap_packets = gensec_spnego_wrap_packets,
1038 .unwrap_packets = gensec_spnego_unwrap_packets,
1039 .session_key = gensec_spnego_session_key,
1040 .session_info = gensec_spnego_session_info,
1041 .have_feature = gensec_spnego_have_feature,
1043 .priority = GENSEC_SPNEGO
1046 _PUBLIC_ NTSTATUS gensec_spnego_init(void)
1049 ret = gensec_register(&gensec_spnego_security_ops);
1050 if (!NT_STATUS_IS_OK(ret)) {
1051 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1052 gensec_spnego_security_ops.name));