2 Unix SMB/CIFS implementation.
4 Kerberos backend for GENSEC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
7 Copyright (C) Stefan Metzmacher <metze@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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "system/kerberos.h"
27 #include "system/network.h"
28 #include "auth/kerberos/kerberos.h"
29 #include "librpc/gen_ndr/ndr_krb5pac.h"
30 #include "auth/auth.h"
32 struct gensec_gssapi_state {
33 gss_ctx_id_t gssapi_context;
34 struct gss_channel_bindings_struct *input_chan_bindings;
35 gss_name_t server_name;
36 gss_name_t client_name;
37 OM_uint32 want_flags, got_flags;
38 const gss_OID_desc *gss_oid;
40 DATA_BLOB session_key;
43 struct smb_krb5_context *smb_krb5_context;
45 const char *ccache_name;
51 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
52 OM_uint32 maj_stat, OM_uint32 min_stat)
54 OM_uint32 disp_min_stat, disp_maj_stat;
55 gss_buffer_desc maj_error_message;
56 gss_buffer_desc min_error_message;
57 OM_uint32 msg_ctx = 0;
61 maj_error_message.value = NULL;
62 min_error_message.value = NULL;
64 disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
65 GSS_C_NULL_OID, &msg_ctx, &maj_error_message);
66 disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
67 GSS_C_NULL_OID, &msg_ctx, &min_error_message);
68 ret = talloc_asprintf(mem_ctx, "%s: %s", (char *)maj_error_message.value, (char *)min_error_message.value);
70 gss_release_buffer(&disp_min_stat, &maj_error_message);
71 gss_release_buffer(&disp_min_stat, &min_error_message);
77 static int gensec_gssapi_destory(void *ptr)
79 struct gensec_gssapi_state *gensec_gssapi_state = ptr;
80 OM_uint32 maj_stat, min_stat;
82 if (gensec_gssapi_state->cred != GSS_C_NO_CREDENTIAL) {
83 maj_stat = gss_release_cred(&min_stat,
84 &gensec_gssapi_state->cred);
87 if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
88 maj_stat = gss_delete_sec_context (&min_stat,
89 &gensec_gssapi_state->gssapi_context,
93 if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
94 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
96 if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
97 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
102 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
104 struct gensec_gssapi_state *gensec_gssapi_state;
107 gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
108 if (!gensec_gssapi_state) {
109 return NT_STATUS_NO_MEMORY;
112 gensec_security->private_data = gensec_gssapi_state;
114 gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
115 gensec_gssapi_state->server_name = GSS_C_NO_NAME;
116 gensec_gssapi_state->client_name = GSS_C_NO_NAME;
118 /* TODO: Fill in channel bindings */
119 gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
121 gensec_gssapi_state->want_flags = GSS_C_MUTUAL_FLAG;
122 gensec_gssapi_state->got_flags = 0;
124 gensec_gssapi_state->session_key = data_blob(NULL, 0);
125 gensec_gssapi_state->pac = data_blob(NULL, 0);
127 gensec_gssapi_state->cred = GSS_C_NO_CREDENTIAL;
129 talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destory);
131 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
132 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
134 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
135 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
137 if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
138 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
141 gensec_gssapi_state->gss_oid = gss_mech_krb5;
143 ret = smb_krb5_init_context(gensec_gssapi_state,
144 &gensec_gssapi_state->smb_krb5_context);
146 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
147 error_message(ret)));
148 return NT_STATUS_INTERNAL_ERROR;
153 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
156 OM_uint32 maj_stat, min_stat;
157 gss_buffer_desc name_token;
158 struct gensec_gssapi_state *gensec_gssapi_state;
159 struct cli_credentials *machine_account;
161 nt_status = gensec_gssapi_start(gensec_security);
162 if (!NT_STATUS_IS_OK(nt_status)) {
166 gensec_gssapi_state = gensec_security->private_data;
168 machine_account = cli_credentials_init(gensec_gssapi_state);
169 cli_credentials_set_conf(machine_account);
170 nt_status = cli_credentials_set_machine_account(machine_account);
172 if (!NT_STATUS_IS_OK(nt_status)) {
173 DEBUG(3, ("Could not obtain machine account credentials from the local database\n"));
174 talloc_free(machine_account);
177 nt_status = create_memory_keytab(gensec_gssapi_state,
179 gensec_gssapi_state->smb_krb5_context,
180 &gensec_gssapi_state->keytab);
181 if (!NT_STATUS_IS_OK(nt_status)) {
182 DEBUG(3, ("Could not create memory keytab!\n"));
183 talloc_free(machine_account);
188 name_token.value = cli_credentials_get_principal(machine_account,
190 name_token.length = strlen(name_token.value);
192 maj_stat = gss_import_name (&min_stat,
195 &gensec_gssapi_state->server_name);
196 talloc_free(machine_account);
199 DEBUG(2, ("GSS Import name of %s failed: %s\n",
200 (char *)name_token.value,
201 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
202 return NT_STATUS_UNSUCCESSFUL;
205 maj_stat = gsskrb5_acquire_cred(&min_stat,
206 gensec_gssapi_state->keytab, NULL,
207 gensec_gssapi_state->server_name,
211 &gensec_gssapi_state->cred,
215 DEBUG(1, ("Aquiring acceptor credentails failed: %s\n",
216 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
217 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
224 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
226 struct gensec_gssapi_state *gensec_gssapi_state;
227 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
228 struct ccache_container *ccache;
231 gss_buffer_desc name_token;
232 OM_uint32 maj_stat, min_stat;
233 const char *hostname = gensec_get_target_hostname(gensec_security);
236 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
237 return NT_STATUS_INVALID_PARAMETER;
239 if (is_ipaddress(hostname)) {
240 DEBUG(2, ("Cannot do GSSAPI to a IP address"));
241 return NT_STATUS_INVALID_PARAMETER;
244 nt_status = gensec_gssapi_start(gensec_security);
245 if (!NT_STATUS_IS_OK(nt_status)) {
249 gensec_gssapi_state = gensec_security->private_data;
251 name_token.value = talloc_asprintf(gensec_gssapi_state, "%s@%s",
252 gensec_get_target_service(gensec_security),
254 name_token.length = strlen(name_token.value);
256 maj_stat = gss_import_name (&min_stat,
258 GSS_C_NT_HOSTBASED_SERVICE,
259 &gensec_gssapi_state->server_name);
261 DEBUG(2, ("GSS Import name of %s failed: %s\n",
262 (char *)name_token.value,
263 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
264 return NT_STATUS_INVALID_PARAMETER;
267 ret = cli_credentials_get_ccache(creds,
270 DEBUG(1, ("Failed to get CCACHE for gensec_gssapi: %s\n", error_message(ret)));
271 return NT_STATUS_UNSUCCESSFUL;
274 name_token.value = cli_credentials_get_principal(creds,
275 gensec_gssapi_state);
276 name_token.length = strlen(name_token.value);
278 maj_stat = gss_import_name (&min_stat,
281 &gensec_gssapi_state->client_name);
283 DEBUG(2, ("GSS Import name of %s failed: %s\n",
284 (char *)name_token.value,
285 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
286 return NT_STATUS_UNSUCCESSFUL;
289 maj_stat = gsskrb5_acquire_cred(&min_stat,
290 NULL, ccache->ccache,
291 gensec_gssapi_state->client_name,
295 &gensec_gssapi_state->cred,
299 DEBUG(1, ("Aquiring initiator credentails failed: %s\n",
300 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
301 return NT_STATUS_UNSUCCESSFUL;
309 * Check if the packet is one for this mechansim
311 * @param gensec_security GENSEC state
312 * @param in The request, as a DATA_BLOB
313 * @return Error, INVALID_PARAMETER if it's not a packet for us
314 * or NT_STATUS_OK if the packet is ok.
317 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
320 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
323 return NT_STATUS_INVALID_PARAMETER;
329 * Next state function for the GSSAPI GENSEC mechanism
331 * @param gensec_gssapi_state GSSAPI State
332 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
333 * @param in The request, as a DATA_BLOB
334 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
335 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
336 * or NT_STATUS_OK if the user is authenticated.
339 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
340 TALLOC_CTX *out_mem_ctx,
341 const DATA_BLOB in, DATA_BLOB *out)
343 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
344 NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
345 OM_uint32 maj_stat, min_stat;
347 gss_buffer_desc input_token, output_token;
349 input_token.length = in.length;
350 input_token.value = in.data;
352 switch (gensec_security->gensec_role) {
355 maj_stat = gss_init_sec_context(&min_stat,
356 gensec_gssapi_state->cred,
357 &gensec_gssapi_state->gssapi_context,
358 gensec_gssapi_state->server_name,
359 discard_const_p(gss_OID_desc, gensec_gssapi_state->gss_oid),
360 gensec_gssapi_state->want_flags,
362 gensec_gssapi_state->input_chan_bindings,
366 &gensec_gssapi_state->got_flags, /* ret flags */
372 maj_stat = gss_accept_sec_context(&min_stat,
373 &gensec_gssapi_state->gssapi_context,
374 gensec_gssapi_state->cred,
376 gensec_gssapi_state->input_chan_bindings,
377 &gensec_gssapi_state->client_name,
380 &gensec_gssapi_state->got_flags,
383 gensec_gssapi_state->gss_oid = gss_oid_p;
387 return NT_STATUS_INVALID_PARAMETER;
391 if (maj_stat == GSS_S_COMPLETE) {
392 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
393 gss_release_buffer(&min_stat2, &output_token);
396 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
397 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
398 gss_release_buffer(&min_stat2, &output_token);
400 return NT_STATUS_MORE_PROCESSING_REQUIRED;
402 if (maj_stat == GSS_S_FAILURE
403 && (min_stat == KRB5KRB_AP_ERR_BADVERSION || min_stat == KRB5KRB_AP_ERR_MSG_TYPE)) {
404 /* garbage input, possibly from the auto-mech detection */
405 return NT_STATUS_INVALID_PARAMETER;
407 DEBUG(1, ("GSS Update failed: %s\n",
408 gssapi_error_string(out_mem_ctx, maj_stat, min_stat)));
413 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
418 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
419 OM_uint32 maj_stat, min_stat;
420 gss_buffer_desc input_token, output_token;
422 input_token.length = in->length;
423 input_token.value = in->data;
425 maj_stat = gss_wrap(&min_stat,
426 gensec_gssapi_state->gssapi_context,
427 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
432 if (GSS_ERROR(maj_stat)) {
433 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
434 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
435 return NT_STATUS_ACCESS_DENIED;
438 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
439 gss_release_buffer(&min_stat, &output_token);
441 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
443 return NT_STATUS_ACCESS_DENIED;
448 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
453 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
454 OM_uint32 maj_stat, min_stat;
455 gss_buffer_desc input_token, output_token;
458 input_token.length = in->length;
459 input_token.value = in->data;
461 maj_stat = gss_unwrap(&min_stat,
462 gensec_gssapi_state->gssapi_context,
467 if (GSS_ERROR(maj_stat)) {
468 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
469 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
470 return NT_STATUS_ACCESS_DENIED;
473 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
474 gss_release_buffer(&min_stat, &output_token);
476 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
478 return NT_STATUS_ACCESS_DENIED;
483 static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security)
485 /* not const but work for DCERPC packets and arcfour */
489 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
491 uint8_t *data, size_t length,
492 const uint8_t *whole_pdu, size_t pdu_length,
495 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
496 OM_uint32 maj_stat, min_stat;
497 gss_buffer_desc input_token, output_token;
499 ssize_t sig_length = 0;
501 input_token.length = length;
502 input_token.value = data;
504 maj_stat = gss_wrap(&min_stat,
505 gensec_gssapi_state->gssapi_context,
506 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
511 if (GSS_ERROR(maj_stat)) {
512 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
513 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
514 return NT_STATUS_ACCESS_DENIED;
517 if (output_token.length < length) {
518 return NT_STATUS_INTERNAL_ERROR;
523 memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
524 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
526 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
527 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
528 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
530 gss_release_buffer(&min_stat, &output_token);
532 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
534 return NT_STATUS_ACCESS_DENIED;
539 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
541 uint8_t *data, size_t length,
542 const uint8_t *whole_pdu, size_t pdu_length,
543 const DATA_BLOB *sig)
545 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
546 OM_uint32 maj_stat, min_stat;
547 gss_buffer_desc input_token, output_token;
552 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
554 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
556 memcpy(in.data, sig->data, sig->length);
557 memcpy(in.data + sig->length, data, length);
559 input_token.length = in.length;
560 input_token.value = in.data;
562 maj_stat = gss_unwrap(&min_stat,
563 gensec_gssapi_state->gssapi_context,
568 if (GSS_ERROR(maj_stat)) {
569 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
570 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
571 return NT_STATUS_ACCESS_DENIED;
574 if (output_token.length != length) {
575 return NT_STATUS_INTERNAL_ERROR;
578 memcpy(data, output_token.value, length);
580 gss_release_buffer(&min_stat, &output_token);
582 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
584 return NT_STATUS_ACCESS_DENIED;
589 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
591 const uint8_t *data, size_t length,
592 const uint8_t *whole_pdu, size_t pdu_length,
595 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
596 OM_uint32 maj_stat, min_stat;
597 gss_buffer_desc input_token, output_token;
599 ssize_t sig_length = 0;
601 input_token.length = length;
602 input_token.value = discard_const_p(uint8_t *, data);
604 maj_stat = gss_wrap(&min_stat,
605 gensec_gssapi_state->gssapi_context,
611 if (GSS_ERROR(maj_stat)) {
612 DEBUG(1, ("GSS Wrap failed: %s\n",
613 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
614 return NT_STATUS_ACCESS_DENIED;
617 if (output_token.length < length) {
618 return NT_STATUS_INTERNAL_ERROR;
623 /*memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);*/
624 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
626 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
628 gss_release_buffer(&min_stat, &output_token);
633 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
635 const uint8_t *data, size_t length,
636 const uint8_t *whole_pdu, size_t pdu_length,
637 const DATA_BLOB *sig)
639 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
640 OM_uint32 maj_stat, min_stat;
641 gss_buffer_desc input_token, output_token;
646 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
648 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
650 memcpy(in.data, sig->data, sig->length);
651 memcpy(in.data + sig->length, data, length);
653 input_token.length = in.length;
654 input_token.value = in.data;
656 maj_stat = gss_unwrap(&min_stat,
657 gensec_gssapi_state->gssapi_context,
662 if (GSS_ERROR(maj_stat)) {
663 DEBUG(1, ("GSS UnWrap failed: %s\n",
664 gssapi_error_string(mem_ctx, maj_stat, min_stat)));
665 return NT_STATUS_ACCESS_DENIED;
668 if (output_token.length != length) {
669 return NT_STATUS_INTERNAL_ERROR;
672 gss_release_buffer(&min_stat, &output_token);
677 static BOOL gensec_gssapi_have_feature(struct gensec_security *gensec_security,
680 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
681 if (feature & GENSEC_FEATURE_SIGN) {
682 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
684 if (feature & GENSEC_FEATURE_SEAL) {
685 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
687 if (feature & GENSEC_FEATURE_SESSION_KEY) {
688 if ((gensec_gssapi_state->gss_oid->length == gss_mech_krb5->length)
689 && (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements, gensec_gssapi_state->gss_oid->length) == 0)) {
693 if (feature & GENSEC_FEATURE_DCE_STYLE) {
694 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
696 if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
702 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
703 DATA_BLOB *session_key)
705 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
707 if (gensec_gssapi_state->session_key.data) {
708 *session_key = gensec_gssapi_state->session_key;
712 /* Ensure we only call this for GSSAPI/krb5, otherwise things could get very ugly */
713 if ((gensec_gssapi_state->gss_oid->length == gss_mech_krb5->length)
714 && (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
715 gensec_gssapi_state->gss_oid->length) == 0)) {
716 OM_uint32 maj_stat, min_stat;
717 gss_buffer_desc skey;
719 maj_stat = gsskrb5_get_initiator_subkey(&min_stat,
720 gensec_gssapi_state->gssapi_context,
724 DEBUG(10, ("Got KRB5 session key of length %d\n",
726 gensec_gssapi_state->session_key = data_blob_talloc(gensec_gssapi_state,
727 skey.value, skey.length);
728 *session_key = gensec_gssapi_state->session_key;
729 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
731 gss_release_buffer(&min_stat, &skey);
734 return NT_STATUS_NO_USER_SESSION_KEY;
737 DEBUG(1, ("NO session key for this mech\n"));
738 return NT_STATUS_NO_USER_SESSION_KEY;
741 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
742 struct auth_session_info **_session_info)
746 struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
747 struct auth_serversupplied_info *server_info = NULL;
748 struct auth_session_info *session_info = NULL;
749 struct PAC_LOGON_INFO *logon_info;
750 OM_uint32 maj_stat, min_stat;
751 gss_buffer_desc name_token;
753 krb5_keyblock *keyblock;
755 krb5_principal principal;
756 char *principal_string;
758 if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
759 || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
760 gensec_gssapi_state->gss_oid->length) != 0)) {
761 DEBUG(1, ("NO session info available for this mech\n"));
762 return NT_STATUS_INVALID_PARAMETER;
765 mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
766 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
768 maj_stat = gss_display_name (&min_stat,
769 gensec_gssapi_state->client_name,
773 return NT_STATUS_FOOBAR;
776 principal_string = talloc_strndup(mem_ctx, name_token.value, name_token.length);
778 gss_release_buffer(&min_stat, &name_token);
780 if (!principal_string) {
781 talloc_free(mem_ctx);
782 return NT_STATUS_NO_MEMORY;
785 maj_stat = gss_krb5_copy_service_keyblock(&min_stat,
786 gensec_gssapi_state->gssapi_context,
790 maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
791 gensec_gssapi_state->gssapi_context,
796 maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
797 gensec_gssapi_state->gssapi_context,
798 KRB5_AUTHDATA_IF_RELEVANT,
804 DATA_BLOB pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
805 pac_blob = unwrap_pac(mem_ctx, &pac_blob);
806 gss_release_buffer(&min_stat, &pac);
808 ret = krb5_parse_name(gensec_gssapi_state->smb_krb5_context->krb5_context,
809 principal_string, &principal);
811 talloc_free(mem_ctx);
812 return NT_STATUS_INVALID_PARAMETER;
815 /* decode and verify the pac */
816 nt_status = kerberos_pac_logon_info(mem_ctx, &logon_info, pac_blob,
817 gensec_gssapi_state->smb_krb5_context->krb5_context,
818 NULL, keyblock, principal, authtime);
819 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
821 if (NT_STATUS_IS_OK(nt_status)) {
822 union netr_Validation validation;
823 validation.sam3 = &logon_info->info3;
824 nt_status = make_server_info_netlogon_validation(gensec_gssapi_state,
828 if (!NT_STATUS_IS_OK(nt_status)) {
829 talloc_free(mem_ctx);
839 DATA_BLOB user_sess_key = data_blob(NULL, 0);
840 DATA_BLOB lm_sess_key = data_blob(NULL, 0);
841 /* IF we have the PAC - otherwise we need to get this
842 * data from elsewere - local ldb, or (TODO) lookup of some
845 * when heimdal can generate the PAC, we should fail if there's
851 ret = krb5_parse_name(gensec_gssapi_state->smb_krb5_context->krb5_context,
852 principal_string, &principal);
854 talloc_free(mem_ctx);
855 return NT_STATUS_INVALID_PARAMETER;
858 realm = krb5_principal_get_realm(gensec_gssapi_state->smb_krb5_context->krb5_context,
860 ret = krb5_unparse_name_norealm(gensec_gssapi_state->smb_krb5_context->krb5_context,
861 principal, &account_name);
863 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
864 talloc_free(mem_ctx);
865 return NT_STATUS_NO_MEMORY;
868 DEBUG(1, ("Unable to use PAC, resorting to local user lookup!\n"));
869 nt_status = sam_get_server_info(mem_ctx, account_name, realm,
870 user_sess_key, lm_sess_key,
873 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
875 if (!NT_STATUS_IS_OK(nt_status)) {
876 talloc_free(mem_ctx);
881 /* references the server_info into the session_info */
882 nt_status = auth_generate_session_info(gensec_gssapi_state, server_info, &session_info);
883 talloc_free(mem_ctx);
884 talloc_free(server_info);
885 NT_STATUS_NOT_OK_RETURN(nt_status);
887 nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
888 NT_STATUS_NOT_OK_RETURN(nt_status);
890 *_session_info = session_info;
895 static const char *gensec_krb5_oids[] = {
896 GENSEC_OID_KERBEROS5,
897 GENSEC_OID_KERBEROS5_OLD,
901 /* As a server, this could in theory accept any GSSAPI mech */
902 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
903 .name = "gssapi_krb5",
904 .auth_type = DCERPC_AUTH_TYPE_KRB5,
905 .oid = gensec_krb5_oids,
906 .client_start = gensec_gssapi_client_start,
907 .server_start = gensec_gssapi_server_start,
908 .magic = gensec_gssapi_magic,
909 .update = gensec_gssapi_update,
910 .session_key = gensec_gssapi_session_key,
911 .session_info = gensec_gssapi_session_info,
912 .sig_size = gensec_gssapi_sig_size,
913 .sign_packet = gensec_gssapi_sign_packet,
914 .check_packet = gensec_gssapi_check_packet,
915 .seal_packet = gensec_gssapi_seal_packet,
916 .unseal_packet = gensec_gssapi_unseal_packet,
917 .wrap = gensec_gssapi_wrap,
918 .unwrap = gensec_gssapi_unwrap,
919 .have_feature = gensec_gssapi_have_feature,
923 NTSTATUS gensec_gssapi_init(void)
927 ret = gensec_register(&gensec_gssapi_krb5_security_ops);
928 if (!NT_STATUS_IS_OK(ret)) {
929 DEBUG(0,("Failed to register '%s' gensec backend!\n",
930 gensec_gssapi_krb5_security_ops.name));