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"
30 enum spnego_state_position {
40 enum spnego_message_type expected_packet;
41 enum spnego_state_position state_position;
42 struct gensec_security *sub_sec_security;
43 bool no_response_expected;
49 static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
51 struct spnego_state *spnego_state;
53 spnego_state = talloc(gensec_security, struct spnego_state);
55 return NT_STATUS_NO_MEMORY;
58 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
59 spnego_state->state_position = SPNEGO_CLIENT_START;
60 spnego_state->sub_sec_security = NULL;
61 spnego_state->no_response_expected = false;
63 gensec_security->private_data = spnego_state;
67 static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_security)
69 struct spnego_state *spnego_state;
71 spnego_state = talloc(gensec_security, struct spnego_state);
73 return NT_STATUS_NO_MEMORY;
76 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
77 spnego_state->state_position = SPNEGO_SERVER_START;
78 spnego_state->sub_sec_security = NULL;
79 spnego_state->no_response_expected = false;
81 gensec_security->private_data = spnego_state;
86 wrappers for the spnego_*() functions
88 static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
90 uint8_t *data, size_t length,
91 const uint8_t *whole_pdu, size_t pdu_length,
94 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
96 if (spnego_state->state_position != SPNEGO_DONE
97 && spnego_state->state_position != SPNEGO_FALLBACK) {
98 return NT_STATUS_INVALID_PARAMETER;
101 return gensec_unseal_packet(spnego_state->sub_sec_security,
104 whole_pdu, pdu_length,
108 static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
110 const uint8_t *data, size_t length,
111 const uint8_t *whole_pdu, size_t pdu_length,
112 const DATA_BLOB *sig)
114 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
116 if (spnego_state->state_position != SPNEGO_DONE
117 && spnego_state->state_position != SPNEGO_FALLBACK) {
118 return NT_STATUS_INVALID_PARAMETER;
121 return gensec_check_packet(spnego_state->sub_sec_security,
124 whole_pdu, pdu_length,
128 static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
130 uint8_t *data, size_t length,
131 const uint8_t *whole_pdu, size_t pdu_length,
134 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
136 if (spnego_state->state_position != SPNEGO_DONE
137 && spnego_state->state_position != SPNEGO_FALLBACK) {
138 return NT_STATUS_INVALID_PARAMETER;
141 return gensec_seal_packet(spnego_state->sub_sec_security,
144 whole_pdu, pdu_length,
148 static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
150 const uint8_t *data, size_t length,
151 const uint8_t *whole_pdu, size_t pdu_length,
154 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
156 if (spnego_state->state_position != SPNEGO_DONE
157 && spnego_state->state_position != SPNEGO_FALLBACK) {
158 return NT_STATUS_INVALID_PARAMETER;
161 return gensec_sign_packet(spnego_state->sub_sec_security,
164 whole_pdu, pdu_length,
168 static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
173 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
175 if (spnego_state->state_position != SPNEGO_DONE
176 && spnego_state->state_position != SPNEGO_FALLBACK) {
177 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
178 return NT_STATUS_INVALID_PARAMETER;
181 return gensec_wrap(spnego_state->sub_sec_security,
185 static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
190 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
192 if (spnego_state->state_position != SPNEGO_DONE
193 && spnego_state->state_position != SPNEGO_FALLBACK) {
194 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
195 return NT_STATUS_INVALID_PARAMETER;
198 return gensec_unwrap(spnego_state->sub_sec_security,
202 static NTSTATUS gensec_spnego_wrap_packets(struct gensec_security *gensec_security,
206 size_t *len_processed)
208 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
210 if (spnego_state->state_position != SPNEGO_DONE
211 && spnego_state->state_position != SPNEGO_FALLBACK) {
212 DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
213 return NT_STATUS_INVALID_PARAMETER;
216 return gensec_wrap_packets(spnego_state->sub_sec_security,
221 static NTSTATUS gensec_spnego_packet_full_request(struct gensec_security *gensec_security,
222 DATA_BLOB blob, size_t *size)
224 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
226 if (spnego_state->state_position != SPNEGO_DONE
227 && spnego_state->state_position != SPNEGO_FALLBACK) {
228 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
229 return NT_STATUS_INVALID_PARAMETER;
232 return gensec_packet_full_request(spnego_state->sub_sec_security,
236 static NTSTATUS gensec_spnego_unwrap_packets(struct gensec_security *gensec_security,
240 size_t *len_processed)
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) {
246 DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
247 return NT_STATUS_INVALID_PARAMETER;
250 return gensec_unwrap_packets(spnego_state->sub_sec_security,
255 static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
257 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
259 if (spnego_state->state_position != SPNEGO_DONE
260 && spnego_state->state_position != SPNEGO_FALLBACK) {
264 return gensec_sig_size(spnego_state->sub_sec_security, data_size);
267 static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
269 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
271 if (spnego_state->state_position != SPNEGO_DONE
272 && spnego_state->state_position != SPNEGO_FALLBACK) {
276 return gensec_max_input_size(spnego_state->sub_sec_security);
279 static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
281 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
283 if (spnego_state->state_position != SPNEGO_DONE
284 && spnego_state->state_position != SPNEGO_FALLBACK) {
288 return gensec_max_wrapped_size(spnego_state->sub_sec_security);
291 static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
292 DATA_BLOB *session_key)
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_key(spnego_state->sub_sec_security,
303 static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
304 struct auth_session_info **session_info)
306 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
307 if (!spnego_state->sub_sec_security) {
308 return NT_STATUS_INVALID_PARAMETER;
311 return gensec_session_info(spnego_state->sub_sec_security,
315 /** Fallback to another GENSEC mechanism, based on magic strings
317 * This is the 'fallback' case, where we don't get SPNEGO, and have to
318 * try all the other options (and hope they all have a magic string
322 static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
323 struct spnego_state *spnego_state,
324 TALLOC_CTX *out_mem_ctx,
325 const DATA_BLOB in, DATA_BLOB *out)
328 struct gensec_security_ops **all_ops
329 = gensec_security_mechs(gensec_security, out_mem_ctx);
330 for (i=0; all_ops[i]; i++) {
333 if (!all_ops[i]->oid) {
338 for (j=0; all_ops[i]->oid[j]; j++) {
339 if (strcasecmp(GENSEC_OID_SPNEGO,all_ops[i]->oid[j]) == 0) {
347 if (!all_ops[i]->magic) {
351 nt_status = all_ops[i]->magic(gensec_security, &in);
352 if (!NT_STATUS_IS_OK(nt_status)) {
356 spnego_state->state_position = SPNEGO_FALLBACK;
358 nt_status = gensec_subcontext_start(spnego_state,
360 &spnego_state->sub_sec_security);
362 if (!NT_STATUS_IS_OK(nt_status)) {
365 /* select the sub context */
366 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
368 if (!NT_STATUS_IS_OK(nt_status)) {
371 nt_status = gensec_update(spnego_state->sub_sec_security,
372 out_mem_ctx, in, out);
375 DEBUG(1, ("Failed to parse SPNEGO request\n"));
376 return NT_STATUS_INVALID_PARAMETER;
381 Parse the netTokenInit, either from the client, to the server, or
382 from the server to the client.
385 static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
386 struct spnego_state *spnego_state,
387 TALLOC_CTX *out_mem_ctx,
388 const char **mechType,
389 const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
392 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
393 DATA_BLOB null_data_blob = data_blob(NULL,0);
395 const struct gensec_security_ops_wrapper *all_sec
396 = gensec_security_by_oid_list(gensec_security,
400 if (spnego_state->state_position == SPNEGO_SERVER_START) {
401 for (i=0; all_sec && all_sec[i].op; i++) {
402 /* optomisitic token */
403 if (strcmp(all_sec[i].oid, mechType[0]) == 0) {
404 nt_status = gensec_subcontext_start(spnego_state,
406 &spnego_state->sub_sec_security);
407 if (!NT_STATUS_IS_OK(nt_status)) {
410 /* select the sub context */
411 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
413 if (!NT_STATUS_IS_OK(nt_status)) {
414 talloc_free(spnego_state->sub_sec_security);
415 spnego_state->sub_sec_security = NULL;
419 nt_status = gensec_update(spnego_state->sub_sec_security,
423 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
424 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
425 /* Pretend we never started it (lets the first run find some incompatible demand) */
427 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
428 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
429 talloc_free(spnego_state->sub_sec_security);
430 spnego_state->sub_sec_security = NULL;
434 spnego_state->neg_oid = all_sec[i].oid;
440 /* Having tried any optomisitc token from the client (if we
441 * were the server), if we didn't get anywhere, walk our list
442 * in our preference order */
444 if (!spnego_state->sub_sec_security) {
445 for (i=0; all_sec && all_sec[i].op; i++) {
446 nt_status = gensec_subcontext_start(spnego_state,
448 &spnego_state->sub_sec_security);
449 if (!NT_STATUS_IS_OK(nt_status)) {
452 /* select the sub context */
453 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
455 if (!NT_STATUS_IS_OK(nt_status)) {
456 talloc_free(spnego_state->sub_sec_security);
457 spnego_state->sub_sec_security = NULL;
461 spnego_state->neg_oid = all_sec[i].oid;
463 /* only get the helping start blob for the first OID */
464 nt_status = gensec_update(spnego_state->sub_sec_security,
469 /* it is likely that a NULL input token will
470 * not be liked by most server mechs, but if
471 * we are in the client, we want the first
472 * update packet to be able to abort the use
474 if (spnego_state->state_position != SPNEGO_SERVER_START) {
475 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
476 NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
477 /* Pretend we never started it (lets the first run find some incompatible demand) */
479 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse: %s\n",
480 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
481 talloc_free(spnego_state->sub_sec_security);
482 spnego_state->sub_sec_security = NULL;
491 if (spnego_state->sub_sec_security) {
492 /* it is likely that a NULL input token will
493 * not be liked by most server mechs, but this
494 * does the right thing in the CIFS client.
495 * just push us along the merry-go-round
496 * again, and hope for better luck next
499 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
500 *unwrapped_out = data_blob(NULL, 0);
501 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
504 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
505 && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
506 && !NT_STATUS_IS_OK(nt_status)) {
507 DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
508 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
509 talloc_free(spnego_state->sub_sec_security);
510 spnego_state->sub_sec_security = NULL;
512 /* We started the mech correctly, and the
513 * input from the other side was valid.
514 * Return the error (say bad password, invalid
520 return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
523 DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
524 /* we could re-negotiate here, but it would only work
525 * if the client or server lied about what it could
526 * support the first time. Lets keep this code to
532 /** create a negTokenInit
534 * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
536 static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
537 struct spnego_state *spnego_state,
538 TALLOC_CTX *out_mem_ctx,
539 const DATA_BLOB in, DATA_BLOB *out)
542 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
543 DATA_BLOB null_data_blob = data_blob(NULL,0);
544 const char **mechTypes = NULL;
545 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
546 const struct gensec_security_ops_wrapper *all_sec;
547 const char *principal = NULL;
549 mechTypes = gensec_security_oids(gensec_security,
550 out_mem_ctx, GENSEC_OID_SPNEGO);
552 all_sec = gensec_security_by_oid_list(gensec_security,
556 for (i=0; all_sec && all_sec[i].op; i++) {
557 struct spnego_data spnego_out;
558 nt_status = gensec_subcontext_start(spnego_state,
560 &spnego_state->sub_sec_security);
561 if (!NT_STATUS_IS_OK(nt_status)) {
564 /* select the sub context */
565 nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
567 if (!NT_STATUS_IS_OK(nt_status)) {
568 talloc_free(spnego_state->sub_sec_security);
569 spnego_state->sub_sec_security = NULL;
573 /* In the client, try and produce the first (optimistic) packet */
574 if (spnego_state->state_position == SPNEGO_CLIENT_START) {
575 nt_status = gensec_update(spnego_state->sub_sec_security,
580 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
581 && !NT_STATUS_IS_OK(nt_status)) {
582 DEBUG(1, ("SPNEGO(%s) creating NEG_TOKEN_INIT failed: %s\n",
583 spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
584 talloc_free(spnego_state->sub_sec_security);
585 spnego_state->sub_sec_security = NULL;
586 /* Pretend we never started it (lets the first run find some incompatible demand) */
592 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
594 /* List the remaining mechs as options */
595 spnego_out.negTokenInit.mechTypes = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
597 spnego_out.negTokenInit.reqFlags = 0;
599 if (spnego_state->state_position == SPNEGO_SERVER_START) {
600 /* server credentials */
601 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
603 principal = cli_credentials_get_principal(creds, out_mem_ctx);
607 spnego_out.negTokenInit.mechListMIC
608 = data_blob_string_const(principal);
610 spnego_out.negTokenInit.mechListMIC = null_data_blob;
613 spnego_out.negTokenInit.mechToken = unwrapped_out;
615 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
616 DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
617 return NT_STATUS_INVALID_PARAMETER;
621 spnego_state->neg_oid = all_sec[i].oid;
623 if (NT_STATUS_IS_OK(nt_status)) {
624 spnego_state->no_response_expected = true;
627 return NT_STATUS_MORE_PROCESSING_REQUIRED;
629 talloc_free(spnego_state->sub_sec_security);
630 spnego_state->sub_sec_security = NULL;
632 DEBUG(1, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
633 return NT_STATUS_INVALID_PARAMETER;
637 /** create a server negTokenTarg
639 * This is the case, where the client is the first one who sends data
642 static NTSTATUS gensec_spnego_server_negTokenTarg(struct gensec_security *gensec_security,
643 struct spnego_state *spnego_state,
644 TALLOC_CTX *out_mem_ctx,
646 const DATA_BLOB unwrapped_out, DATA_BLOB *out)
648 struct spnego_data spnego_out;
649 DATA_BLOB null_data_blob = data_blob(NULL, 0);
652 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
653 spnego_out.negTokenTarg.responseToken = unwrapped_out;
654 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
655 spnego_out.negTokenTarg.supportedMech = NULL;
657 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
658 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
659 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
660 spnego_state->state_position = SPNEGO_SERVER_TARG;
661 } else if (NT_STATUS_IS_OK(nt_status)) {
662 if (unwrapped_out.data) {
663 spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
665 spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
666 spnego_state->state_position = SPNEGO_DONE;
668 spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
669 DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
670 spnego_state->state_position = SPNEGO_DONE;
673 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
674 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
675 return NT_STATUS_INVALID_PARAMETER;
678 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
684 static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
685 const DATA_BLOB in, DATA_BLOB *out)
687 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
688 DATA_BLOB null_data_blob = data_blob(NULL, 0);
689 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
690 struct spnego_data spnego_out;
691 struct spnego_data spnego;
695 *out = data_blob(NULL, 0);
698 out_mem_ctx = spnego_state;
701 /* and switch into the state machine */
703 switch (spnego_state->state_position) {
704 case SPNEGO_FALLBACK:
705 return gensec_update(spnego_state->sub_sec_security,
706 out_mem_ctx, in, out);
707 case SPNEGO_SERVER_START:
712 len = spnego_read_data(gensec_security, in, &spnego);
714 return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
715 out_mem_ctx, in, out);
717 /* client sent NegTargetInit, we send NegTokenTarg */
719 /* OK, so it's real SPNEGO, check the packet's the one we expect */
720 if (spnego.type != spnego_state->expected_packet) {
721 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
722 spnego_state->expected_packet));
723 dump_data(1, in.data, in.length);
724 spnego_free_data(&spnego);
725 return NT_STATUS_INVALID_PARAMETER;
728 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
731 spnego.negTokenInit.mechTypes,
732 spnego.negTokenInit.mechToken,
735 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
742 spnego_free_data(&spnego);
746 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
747 out_mem_ctx, in, out);
748 spnego_state->state_position = SPNEGO_SERVER_START;
749 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
754 case SPNEGO_CLIENT_START:
756 /* The server offers a list of mechanisms */
758 const char *my_mechs[] = {NULL, NULL};
759 NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
762 /* client to produce negTokenInit */
763 nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
764 out_mem_ctx, in, out);
765 spnego_state->state_position = SPNEGO_CLIENT_TARG;
766 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
770 len = spnego_read_data(gensec_security, in, &spnego);
773 DEBUG(1, ("Invalid SPNEGO request:\n"));
774 dump_data(1, in.data, in.length);
775 return NT_STATUS_INVALID_PARAMETER;
778 /* OK, so it's real SPNEGO, check the packet's the one we expect */
779 if (spnego.type != spnego_state->expected_packet) {
780 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
781 spnego_state->expected_packet));
782 dump_data(1, in.data, in.length);
783 spnego_free_data(&spnego);
784 return NT_STATUS_INVALID_PARAMETER;
787 if (spnego.negTokenInit.targetPrincipal) {
788 DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
789 gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
792 nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
795 spnego.negTokenInit.mechTypes,
796 spnego.negTokenInit.mechToken,
799 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
800 spnego_free_data(&spnego);
804 my_mechs[0] = spnego_state->neg_oid;
806 spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
807 spnego_out.negTokenInit.mechTypes = my_mechs;
808 spnego_out.negTokenInit.reqFlags = 0;
809 spnego_out.negTokenInit.mechListMIC = null_data_blob;
810 spnego_out.negTokenInit.mechToken = unwrapped_out;
812 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
813 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
814 return NT_STATUS_INVALID_PARAMETER;
818 spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
819 spnego_state->state_position = SPNEGO_CLIENT_TARG;
821 if (NT_STATUS_IS_OK(nt_status)) {
822 spnego_state->no_response_expected = true;
825 spnego_free_data(&spnego);
826 return NT_STATUS_MORE_PROCESSING_REQUIRED;
828 case SPNEGO_SERVER_TARG:
832 return NT_STATUS_INVALID_PARAMETER;
835 len = spnego_read_data(gensec_security, in, &spnego);
838 DEBUG(1, ("Invalid SPNEGO request:\n"));
839 dump_data(1, in.data, in.length);
840 return NT_STATUS_INVALID_PARAMETER;
843 /* OK, so it's real SPNEGO, check the packet's the one we expect */
844 if (spnego.type != spnego_state->expected_packet) {
845 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
846 spnego_state->expected_packet));
847 dump_data(1, in.data, in.length);
848 spnego_free_data(&spnego);
849 return NT_STATUS_INVALID_PARAMETER;
852 if (!spnego_state->sub_sec_security) {
853 DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
854 spnego_free_data(&spnego);
855 return NT_STATUS_INVALID_PARAMETER;
858 nt_status = gensec_update(spnego_state->sub_sec_security,
860 spnego.negTokenTarg.responseToken,
863 nt_status = gensec_spnego_server_negTokenTarg(gensec_security,
870 spnego_free_data(&spnego);
874 case SPNEGO_CLIENT_TARG:
878 return NT_STATUS_INVALID_PARAMETER;
881 len = spnego_read_data(gensec_security, in, &spnego);
884 DEBUG(1, ("Invalid SPNEGO request:\n"));
885 dump_data(1, in.data, in.length);
886 return NT_STATUS_INVALID_PARAMETER;
889 /* OK, so it's real SPNEGO, check the packet's the one we expect */
890 if (spnego.type != spnego_state->expected_packet) {
891 DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
892 spnego_state->expected_packet));
893 dump_data(1, in.data, in.length);
894 spnego_free_data(&spnego);
895 return NT_STATUS_INVALID_PARAMETER;
898 if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
899 spnego_free_data(&spnego);
900 return NT_STATUS_ACCESS_DENIED;
903 /* Server didn't like our choice of mech, and chose something else */
904 if ((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) &&
905 spnego.negTokenTarg.supportedMech &&
906 strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
907 DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
908 gensec_get_name_by_oid(spnego.negTokenTarg.supportedMech),
909 gensec_get_name_by_oid(spnego_state->neg_oid)));
911 talloc_free(spnego_state->sub_sec_security);
912 nt_status = gensec_subcontext_start(spnego_state,
914 &spnego_state->sub_sec_security);
915 if (!NT_STATUS_IS_OK(nt_status)) {
916 spnego_free_data(&spnego);
919 /* select the sub context */
920 nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
921 spnego.negTokenTarg.supportedMech);
922 if (!NT_STATUS_IS_OK(nt_status)) {
923 spnego_free_data(&spnego);
927 nt_status = gensec_update(spnego_state->sub_sec_security,
929 spnego.negTokenTarg.responseToken,
931 spnego_state->neg_oid = talloc_strdup(spnego_state, spnego.negTokenTarg.supportedMech);
932 } else if (spnego_state->no_response_expected) {
933 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
934 DEBUG(3,("GENSEC SPNEGO: client GENSEC accepted, but server rejected (bad password?)\n"));
935 nt_status = NT_STATUS_INVALID_PARAMETER;
936 } else if (spnego.negTokenTarg.responseToken.length) {
937 DEBUG(2,("GENSEC SPNEGO: client GENSEC accepted, but server continued negotiation!\n"));
938 nt_status = NT_STATUS_INVALID_PARAMETER;
940 nt_status = NT_STATUS_OK;
943 nt_status = gensec_update(spnego_state->sub_sec_security,
945 spnego.negTokenTarg.responseToken,
948 if (NT_STATUS_IS_OK(nt_status)) {
949 spnego_state->no_response_expected = true;
953 spnego_free_data(&spnego);
955 if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
956 && !NT_STATUS_IS_OK(nt_status)) {
957 DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
958 spnego_state->sub_sec_security->ops->name,
959 nt_errstr(nt_status)));
963 if (unwrapped_out.length) {
965 spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
966 spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
967 spnego_out.negTokenTarg.supportedMech = NULL;
968 spnego_out.negTokenTarg.responseToken = unwrapped_out;
969 spnego_out.negTokenTarg.mechListMIC = null_data_blob;
971 if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
972 DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
973 return NT_STATUS_INVALID_PARAMETER;
976 spnego_state->state_position = SPNEGO_CLIENT_TARG;
977 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
980 /* all done - server has accepted, and we agree */
981 *out = null_data_blob;
983 if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
984 /* unless of course it did not accept */
985 DEBUG(1,("gensec_update ok but not accepted\n"));
986 nt_status = NT_STATUS_INVALID_PARAMETER;
989 spnego_state->state_position = SPNEGO_DONE;
995 /* We should not be called after we are 'done' */
996 return NT_STATUS_INVALID_PARAMETER;
998 return NT_STATUS_INVALID_PARAMETER;
1001 static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
1004 struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
1005 if (!spnego_state->sub_sec_security) {
1009 return gensec_have_feature(spnego_state->sub_sec_security,
1013 static const char *gensec_spnego_oids[] = {
1018 static const struct gensec_security_ops gensec_spnego_security_ops = {
1020 .sasl_name = "GSS-SPNEGO",
1021 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1022 .oid = gensec_spnego_oids,
1023 .client_start = gensec_spnego_client_start,
1024 .server_start = gensec_spnego_server_start,
1025 .update = gensec_spnego_update,
1026 .seal_packet = gensec_spnego_seal_packet,
1027 .sign_packet = gensec_spnego_sign_packet,
1028 .sig_size = gensec_spnego_sig_size,
1029 .max_wrapped_size = gensec_spnego_max_wrapped_size,
1030 .max_input_size = gensec_spnego_max_input_size,
1031 .check_packet = gensec_spnego_check_packet,
1032 .unseal_packet = gensec_spnego_unseal_packet,
1033 .packet_full_request = gensec_spnego_packet_full_request,
1034 .wrap = gensec_spnego_wrap,
1035 .unwrap = gensec_spnego_unwrap,
1036 .wrap_packets = gensec_spnego_wrap_packets,
1037 .unwrap_packets = gensec_spnego_unwrap_packets,
1038 .session_key = gensec_spnego_session_key,
1039 .session_info = gensec_spnego_session_info,
1040 .have_feature = gensec_spnego_have_feature,
1042 .priority = GENSEC_SPNEGO
1045 _PUBLIC_ NTSTATUS gensec_spnego_init(void)
1048 ret = gensec_register(&gensec_spnego_security_ops);
1049 if (!NT_STATUS_IS_OK(ret)) {
1050 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1051 gensec_spnego_security_ops.name));