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 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 "lib/events/events.h"
26 #include "system/kerberos.h"
27 #include "auth/kerberos/kerberos.h"
28 #include "librpc/gen_ndr/krb5pac.h"
29 #include "auth/auth.h"
30 #include "lib/ldb/include/ldb.h"
31 #include "auth/auth_sam.h"
32 #include "librpc/rpc/dcerpc.h"
33 #include "auth/credentials/credentials.h"
34 #include "auth/credentials/credentials_krb5.h"
35 #include "auth/gensec/gensec.h"
36 #include "auth/gensec/gensec_proto.h"
37 #include "param/param.h"
38 #include "auth/session_proto.h"
39 #include <gssapi/gssapi.h>
40 #include <gssapi/gssapi_krb5.h>
41 #include <gssapi/gssapi_spnego.h>
42 #include "auth/gensec/gensec_gssapi.h"
43 #include "lib/util/util_net.h"
45 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
46 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
48 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
49 OM_uint32 maj_stat, OM_uint32 min_stat,
52 OM_uint32 disp_min_stat, disp_maj_stat;
53 gss_buffer_desc maj_error_message;
54 gss_buffer_desc min_error_message;
55 char *maj_error_string, *min_error_string;
56 OM_uint32 msg_ctx = 0;
60 maj_error_message.value = NULL;
61 min_error_message.value = NULL;
62 maj_error_message.length = 0;
63 min_error_message.length = 0;
65 disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
66 mech, &msg_ctx, &maj_error_message);
67 disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
68 mech, &msg_ctx, &min_error_message);
70 maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
72 min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
74 ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
76 talloc_free(maj_error_string);
77 talloc_free(min_error_string);
79 gss_release_buffer(&disp_min_stat, &maj_error_message);
80 gss_release_buffer(&disp_min_stat, &min_error_message);
86 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
88 OM_uint32 maj_stat, min_stat;
90 if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
91 maj_stat = gss_release_cred(&min_stat,
92 &gensec_gssapi_state->delegated_cred_handle);
95 if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
96 maj_stat = gss_delete_sec_context (&min_stat,
97 &gensec_gssapi_state->gssapi_context,
101 if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
102 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
104 if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
105 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
108 if (gensec_gssapi_state->lucid) {
109 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
115 static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
117 OM_uint32 maj_stat, min_stat;
119 if (gensec_gssapi_state->lucid) {
123 maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
124 &gensec_gssapi_state->gssapi_context,
126 (void **)&gensec_gssapi_state->lucid);
127 if (maj_stat != GSS_S_COMPLETE) {
128 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
129 gssapi_error_string(gensec_gssapi_state,
131 gensec_gssapi_state->gss_oid)));
132 return NT_STATUS_INTERNAL_ERROR;
135 if (gensec_gssapi_state->lucid->version != 1) {
136 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
137 gensec_gssapi_state->lucid->version));
138 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
139 gensec_gssapi_state->lucid = NULL;
140 return NT_STATUS_INTERNAL_ERROR;
146 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
148 struct gensec_gssapi_state *gensec_gssapi_state;
150 struct gsskrb5_send_to_kdc send_to_kdc;
153 gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
154 if (!gensec_gssapi_state) {
155 return NT_STATUS_NO_MEMORY;
158 gensec_gssapi_state->gss_exchange_count = 0;
159 gensec_gssapi_state->max_wrap_buf_size
160 = gensec_setting_int(gensec_security->settings, "gensec_gssapi", "max wrap buf size", 65536);
162 gensec_gssapi_state->sasl = false;
163 gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
165 gensec_security->private_data = gensec_gssapi_state;
167 gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
168 gensec_gssapi_state->server_name = GSS_C_NO_NAME;
169 gensec_gssapi_state->client_name = GSS_C_NO_NAME;
170 gensec_gssapi_state->lucid = NULL;
172 /* TODO: Fill in channel bindings */
173 gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
175 gensec_gssapi_state->want_flags = 0;
176 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation_by_kdc_policy", true)) {
177 gensec_gssapi_state->want_flags |= GSS_C_DELEG_POLICY_FLAG;
179 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "mutual", true)) {
180 gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
182 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", true)) {
183 gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
185 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "replay", true)) {
186 gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
188 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "sequence", true)) {
189 gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
192 gensec_gssapi_state->got_flags = 0;
194 gensec_gssapi_state->session_key = data_blob(NULL, 0);
195 gensec_gssapi_state->pac = data_blob(NULL, 0);
197 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
198 gensec_gssapi_state->sig_size = 0;
200 talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
202 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
203 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
205 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
206 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
208 if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
209 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
212 switch (gensec_security->ops->auth_type) {
213 case DCERPC_AUTH_TYPE_SPNEGO:
214 gensec_gssapi_state->gss_oid = gss_mech_spnego;
216 case DCERPC_AUTH_TYPE_KRB5:
218 gensec_gssapi_state->gss_oid = gss_mech_krb5;
222 send_to_kdc.func = smb_krb5_send_and_recv_func;
223 send_to_kdc.ptr = gensec_security->event_ctx;
225 ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
227 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
228 talloc_free(gensec_gssapi_state);
229 return NT_STATUS_INTERNAL_ERROR;
232 realm = lp_realm(gensec_security->settings->lp_ctx);
234 ret = gsskrb5_set_default_realm(realm);
236 DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
237 talloc_free(gensec_gssapi_state);
238 return NT_STATUS_INTERNAL_ERROR;
242 /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
243 ret = gsskrb5_set_dns_canonicalize(gensec_setting_bool(gensec_security->settings, "krb5", "set_dns_canonicalize", false));
245 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
246 talloc_free(gensec_gssapi_state);
247 return NT_STATUS_INTERNAL_ERROR;
250 ret = smb_krb5_init_context(gensec_gssapi_state,
251 gensec_security->event_ctx,
252 gensec_security->settings->lp_ctx,
253 &gensec_gssapi_state->smb_krb5_context);
255 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
256 error_message(ret)));
257 talloc_free(gensec_gssapi_state);
258 return NT_STATUS_INTERNAL_ERROR;
263 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
267 struct gensec_gssapi_state *gensec_gssapi_state;
268 struct cli_credentials *machine_account;
269 struct gssapi_creds_container *gcc;
271 nt_status = gensec_gssapi_start(gensec_security);
272 if (!NT_STATUS_IS_OK(nt_status)) {
276 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
278 machine_account = gensec_get_credentials(gensec_security);
280 if (!machine_account) {
281 DEBUG(3, ("No machine account credentials specified\n"));
282 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
284 ret = cli_credentials_get_server_gss_creds(machine_account,
285 gensec_security->event_ctx,
286 gensec_security->settings->lp_ctx, &gcc);
288 DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
289 error_message(ret)));
290 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
294 gensec_gssapi_state->server_cred = gcc;
299 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
302 struct gensec_gssapi_state *gensec_gssapi_state;
303 nt_status = gensec_gssapi_server_start(gensec_security);
305 if (NT_STATUS_IS_OK(nt_status)) {
306 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
307 gensec_gssapi_state->sasl = true;
312 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
314 struct gensec_gssapi_state *gensec_gssapi_state;
315 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
318 gss_buffer_desc name_token;
320 OM_uint32 maj_stat, min_stat;
321 const char *hostname = gensec_get_target_hostname(gensec_security);
322 const char *principal;
323 struct gssapi_creds_container *gcc;
324 const char *error_string;
327 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
328 return NT_STATUS_INVALID_PARAMETER;
330 if (is_ipaddress(hostname)) {
331 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
332 return NT_STATUS_INVALID_PARAMETER;
334 if (strcmp(hostname, "localhost") == 0) {
335 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
336 return NT_STATUS_INVALID_PARAMETER;
339 nt_status = gensec_gssapi_start(gensec_security);
340 if (!NT_STATUS_IS_OK(nt_status)) {
344 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
346 principal = gensec_get_target_principal(gensec_security);
347 if (principal && lp_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
348 name_type = GSS_C_NULL_OID;
350 principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
351 gensec_get_target_service(gensec_security),
354 name_type = GSS_C_NT_HOSTBASED_SERVICE;
356 name_token.value = discard_const_p(uint8_t, principal);
357 name_token.length = strlen(principal);
360 maj_stat = gss_import_name (&min_stat,
363 &gensec_gssapi_state->server_name);
365 DEBUG(2, ("GSS Import name of %s failed: %s\n",
366 (char *)name_token.value,
367 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
368 return NT_STATUS_INVALID_PARAMETER;
371 ret = cli_credentials_get_client_gss_creds(creds,
372 gensec_security->event_ctx,
373 gensec_security->settings->lp_ctx, &gcc, &error_string);
377 case KRB5KDC_ERR_PREAUTH_FAILED:
378 return NT_STATUS_LOGON_FAILURE;
379 case KRB5_KDC_UNREACH:
380 DEBUG(3, ("Cannot reach a KDC we require to contact %s : %s\n", principal, error_string));
381 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
383 DEBUG(1, ("Aquiring initiator credentials failed: %s\n", error_string));
384 return NT_STATUS_UNSUCCESSFUL;
387 gensec_gssapi_state->client_cred = gcc;
388 if (!talloc_reference(gensec_gssapi_state, gcc)) {
389 return NT_STATUS_NO_MEMORY;
395 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
398 struct gensec_gssapi_state *gensec_gssapi_state;
399 nt_status = gensec_gssapi_client_start(gensec_security);
401 if (NT_STATUS_IS_OK(nt_status)) {
402 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
403 gensec_gssapi_state->sasl = true;
410 * Check if the packet is one for this mechansim
412 * @param gensec_security GENSEC state
413 * @param in The request, as a DATA_BLOB
414 * @return Error, INVALID_PARAMETER if it's not a packet for us
415 * or NT_STATUS_OK if the packet is ok.
418 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
421 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
424 return NT_STATUS_INVALID_PARAMETER;
430 * Next state function for the GSSAPI GENSEC mechanism
432 * @param gensec_gssapi_state GSSAPI State
433 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
434 * @param in The request, as a DATA_BLOB
435 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
436 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
437 * or NT_STATUS_OK if the user is authenticated.
440 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
441 TALLOC_CTX *out_mem_ctx,
442 const DATA_BLOB in, DATA_BLOB *out)
444 struct gensec_gssapi_state *gensec_gssapi_state
445 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
446 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
447 OM_uint32 maj_stat, min_stat;
449 gss_buffer_desc input_token, output_token;
450 gss_OID gss_oid_p = NULL;
451 input_token.length = in.length;
452 input_token.value = in.data;
454 switch (gensec_gssapi_state->sasl_state) {
457 switch (gensec_security->gensec_role) {
460 maj_stat = gss_init_sec_context(&min_stat,
461 gensec_gssapi_state->client_cred->creds,
462 &gensec_gssapi_state->gssapi_context,
463 gensec_gssapi_state->server_name,
464 gensec_gssapi_state->gss_oid,
465 gensec_gssapi_state->want_flags,
467 gensec_gssapi_state->input_chan_bindings,
471 &gensec_gssapi_state->got_flags, /* ret flags */
474 gensec_gssapi_state->gss_oid = gss_oid_p;
480 maj_stat = gss_accept_sec_context(&min_stat,
481 &gensec_gssapi_state->gssapi_context,
482 gensec_gssapi_state->server_cred->creds,
484 gensec_gssapi_state->input_chan_bindings,
485 &gensec_gssapi_state->client_name,
488 &gensec_gssapi_state->got_flags,
490 &gensec_gssapi_state->delegated_cred_handle);
492 gensec_gssapi_state->gss_oid = gss_oid_p;
497 return NT_STATUS_INVALID_PARAMETER;
501 gensec_gssapi_state->gss_exchange_count++;
503 if (maj_stat == GSS_S_COMPLETE) {
504 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
505 gss_release_buffer(&min_stat2, &output_token);
507 if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
508 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
510 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
513 /* We may have been invoked as SASL, so there
514 * is more work to do */
515 if (gensec_gssapi_state->sasl) {
516 /* Due to a very subtle interaction
517 * with SASL and the LDAP libs, we
518 * must ensure the data pointer is
519 * != NULL, but the length is 0.
521 * This ensures we send a 'zero
522 * length' (rather than NULL) response
526 out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
529 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
530 return NT_STATUS_MORE_PROCESSING_REQUIRED;
532 gensec_gssapi_state->sasl_state = STAGE_DONE;
534 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
535 DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
536 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
537 DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
539 DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
544 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
545 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
546 gss_release_buffer(&min_stat2, &output_token);
548 return NT_STATUS_MORE_PROCESSING_REQUIRED;
549 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
551 case KRB5_KDC_UNREACH:
552 DEBUG(3, ("Cannot reach a KDC we require: %s\n",
553 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
554 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
555 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
556 DEBUG(3, ("Server is not registered with our KDC: %s\n",
557 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
558 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
559 case KRB5KRB_AP_ERR_MSG_TYPE:
560 /* garbage input, possibly from the auto-mech detection */
561 return NT_STATUS_INVALID_PARAMETER;
563 DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
564 gensec_gssapi_state->gss_exchange_count,
565 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
569 DEBUG(1, ("GSS Update(%d) failed: %s\n",
570 gensec_gssapi_state->gss_exchange_count,
571 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
577 /* These last two stages are only done if we were invoked as SASL */
578 case STAGE_SASL_SSF_NEG:
580 switch (gensec_security->gensec_role) {
583 uint8_t maxlength_proposed[4];
584 uint8_t maxlength_accepted[4];
585 uint8_t security_supported;
588 input_token.length = in.length;
589 input_token.value = in.data;
591 /* As a client, we have just send a
592 * zero-length blob to the server (after the
593 * normal GSSAPI exchange), and it has replied
594 * with it's SASL negotiation */
596 maj_stat = gss_unwrap(&min_stat,
597 gensec_gssapi_state->gssapi_context,
602 if (GSS_ERROR(maj_stat)) {
603 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
604 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
605 return NT_STATUS_ACCESS_DENIED;
608 if (output_token.length < 4) {
609 return NT_STATUS_INVALID_PARAMETER;
612 memcpy(maxlength_proposed, output_token.value, 4);
613 gss_release_buffer(&min_stat, &output_token);
615 /* first byte is the proposed security */
616 security_supported = maxlength_proposed[0];
617 maxlength_proposed[0] = '\0';
619 /* Rest is the proposed max wrap length */
620 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
621 gensec_gssapi_state->max_wrap_buf_size);
622 gensec_gssapi_state->sasl_protection = 0;
623 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
624 if (security_supported & NEG_SEAL) {
625 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
627 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
628 if (security_supported & NEG_SIGN) {
629 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
631 } else if (security_supported & NEG_NONE) {
632 gensec_gssapi_state->sasl_protection |= NEG_NONE;
634 DEBUG(1, ("Remote server does not support unprotected connections"));
635 return NT_STATUS_ACCESS_DENIED;
638 /* Send back the negotiated max length */
640 RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
642 maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
644 input_token.value = maxlength_accepted;
645 input_token.length = sizeof(maxlength_accepted);
647 maj_stat = gss_wrap(&min_stat,
648 gensec_gssapi_state->gssapi_context,
654 if (GSS_ERROR(maj_stat)) {
655 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
656 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
657 return NT_STATUS_ACCESS_DENIED;
660 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
661 gss_release_buffer(&min_stat, &output_token);
663 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
664 gensec_gssapi_state->sasl_state = STAGE_DONE;
666 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
667 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
668 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
669 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
671 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
678 uint8_t maxlength_proposed[4];
679 uint8_t security_supported = 0x0;
682 /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
683 if (in.length != 0) {
684 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
687 /* Give the client some idea what we will support */
689 RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
690 /* first byte is the proposed security */
691 maxlength_proposed[0] = '\0';
693 gensec_gssapi_state->sasl_protection = 0;
694 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
695 security_supported |= NEG_SEAL;
697 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
698 security_supported |= NEG_SIGN;
700 if (security_supported == 0) {
701 /* If we don't support anything, this must be 0 */
702 RSIVAL(maxlength_proposed, 0, 0x0);
705 /* TODO: We may not wish to support this */
706 security_supported |= NEG_NONE;
707 maxlength_proposed[0] = security_supported;
709 input_token.value = maxlength_proposed;
710 input_token.length = sizeof(maxlength_proposed);
712 maj_stat = gss_wrap(&min_stat,
713 gensec_gssapi_state->gssapi_context,
719 if (GSS_ERROR(maj_stat)) {
720 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
721 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
722 return NT_STATUS_ACCESS_DENIED;
725 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
726 gss_release_buffer(&min_stat, &output_token);
728 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
729 return NT_STATUS_MORE_PROCESSING_REQUIRED;
732 return NT_STATUS_INVALID_PARAMETER;
736 /* This is s server-only stage */
737 case STAGE_SASL_SSF_ACCEPT:
739 uint8_t maxlength_accepted[4];
740 uint8_t security_accepted;
743 input_token.length = in.length;
744 input_token.value = in.data;
746 maj_stat = gss_unwrap(&min_stat,
747 gensec_gssapi_state->gssapi_context,
752 if (GSS_ERROR(maj_stat)) {
753 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
754 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
755 return NT_STATUS_ACCESS_DENIED;
758 if (output_token.length < 4) {
759 return NT_STATUS_INVALID_PARAMETER;
762 memcpy(maxlength_accepted, output_token.value, 4);
763 gss_release_buffer(&min_stat, &output_token);
765 /* first byte is the proposed security */
766 security_accepted = maxlength_accepted[0];
767 maxlength_accepted[0] = '\0';
769 /* Rest is the proposed max wrap length */
770 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
771 gensec_gssapi_state->max_wrap_buf_size);
773 gensec_gssapi_state->sasl_protection = 0;
774 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
775 if (security_accepted & NEG_SEAL) {
776 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
778 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
779 if (security_accepted & NEG_SIGN) {
780 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
782 } else if (security_accepted & NEG_NONE) {
783 gensec_gssapi_state->sasl_protection |= NEG_NONE;
785 DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
786 return NT_STATUS_ACCESS_DENIED;
789 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
790 gensec_gssapi_state->sasl_state = STAGE_DONE;
791 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
792 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
793 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
794 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
796 DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
799 *out = data_blob(NULL, 0);
803 return NT_STATUS_INVALID_PARAMETER;
807 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
812 struct gensec_gssapi_state *gensec_gssapi_state
813 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
814 OM_uint32 maj_stat, min_stat;
815 gss_buffer_desc input_token, output_token;
817 input_token.length = in->length;
818 input_token.value = in->data;
820 maj_stat = gss_wrap(&min_stat,
821 gensec_gssapi_state->gssapi_context,
822 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
827 if (GSS_ERROR(maj_stat)) {
828 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
829 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
830 return NT_STATUS_ACCESS_DENIED;
833 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
834 gss_release_buffer(&min_stat, &output_token);
836 if (gensec_gssapi_state->sasl) {
837 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
838 if (max_wrapped_size < out->length) {
839 DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
840 (unsigned)in->length,
841 (unsigned)out->length,
842 (unsigned int)max_wrapped_size));
843 return NT_STATUS_INVALID_PARAMETER;
847 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
849 return NT_STATUS_ACCESS_DENIED;
854 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
859 struct gensec_gssapi_state *gensec_gssapi_state
860 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
861 OM_uint32 maj_stat, min_stat;
862 gss_buffer_desc input_token, output_token;
865 input_token.length = in->length;
866 input_token.value = in->data;
868 if (gensec_gssapi_state->sasl) {
869 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
870 if (max_wrapped_size < in->length) {
871 DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
872 return NT_STATUS_INVALID_PARAMETER;
876 maj_stat = gss_unwrap(&min_stat,
877 gensec_gssapi_state->gssapi_context,
882 if (GSS_ERROR(maj_stat)) {
883 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
884 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
885 return NT_STATUS_ACCESS_DENIED;
888 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
889 gss_release_buffer(&min_stat, &output_token);
891 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
893 return NT_STATUS_ACCESS_DENIED;
898 /* Find out the maximum input size negotiated on this connection */
900 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
902 struct gensec_gssapi_state *gensec_gssapi_state
903 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
904 OM_uint32 maj_stat, min_stat;
905 OM_uint32 max_input_size;
907 maj_stat = gss_wrap_size_limit(&min_stat,
908 gensec_gssapi_state->gssapi_context,
909 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
911 gensec_gssapi_state->max_wrap_buf_size,
913 if (GSS_ERROR(maj_stat)) {
914 TALLOC_CTX *mem_ctx = talloc_new(NULL);
915 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
916 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
917 talloc_free(mem_ctx);
921 return max_input_size;
924 /* Find out the maximum output size negotiated on this connection */
925 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
927 struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
928 return gensec_gssapi_state->max_wrap_buf_size;
931 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
933 uint8_t *data, size_t length,
934 const uint8_t *whole_pdu, size_t pdu_length,
937 struct gensec_gssapi_state *gensec_gssapi_state
938 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
939 OM_uint32 maj_stat, min_stat;
940 gss_buffer_desc input_token, output_token;
944 input_token.length = length;
945 input_token.value = data;
947 maj_stat = gss_wrap(&min_stat,
948 gensec_gssapi_state->gssapi_context,
949 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
954 if (GSS_ERROR(maj_stat)) {
955 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
956 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
957 return NT_STATUS_ACCESS_DENIED;
960 if (output_token.length < input_token.length) {
961 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
962 (long)output_token.length, (long)length));
963 return NT_STATUS_INTERNAL_ERROR;
965 sig_length = output_token.length - input_token.length;
967 memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
968 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
970 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
971 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
972 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
974 gss_release_buffer(&min_stat, &output_token);
976 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
978 return NT_STATUS_ACCESS_DENIED;
983 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
985 uint8_t *data, size_t length,
986 const uint8_t *whole_pdu, size_t pdu_length,
987 const DATA_BLOB *sig)
989 struct gensec_gssapi_state *gensec_gssapi_state
990 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
991 OM_uint32 maj_stat, min_stat;
992 gss_buffer_desc input_token, output_token;
997 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
999 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
1001 memcpy(in.data, sig->data, sig->length);
1002 memcpy(in.data + sig->length, data, length);
1004 input_token.length = in.length;
1005 input_token.value = in.data;
1007 maj_stat = gss_unwrap(&min_stat,
1008 gensec_gssapi_state->gssapi_context,
1013 if (GSS_ERROR(maj_stat)) {
1014 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1015 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1016 return NT_STATUS_ACCESS_DENIED;
1019 if (output_token.length != length) {
1020 return NT_STATUS_INTERNAL_ERROR;
1023 memcpy(data, output_token.value, length);
1025 gss_release_buffer(&min_stat, &output_token);
1027 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1029 return NT_STATUS_ACCESS_DENIED;
1031 return NT_STATUS_OK;
1034 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1035 TALLOC_CTX *mem_ctx,
1036 const uint8_t *data, size_t length,
1037 const uint8_t *whole_pdu, size_t pdu_length,
1040 struct gensec_gssapi_state *gensec_gssapi_state
1041 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1042 OM_uint32 maj_stat, min_stat;
1043 gss_buffer_desc input_token, output_token;
1045 if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1046 input_token.length = pdu_length;
1047 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1049 input_token.length = length;
1050 input_token.value = discard_const_p(uint8_t *, data);
1053 maj_stat = gss_get_mic(&min_stat,
1054 gensec_gssapi_state->gssapi_context,
1058 if (GSS_ERROR(maj_stat)) {
1059 DEBUG(1, ("GSS GetMic failed: %s\n",
1060 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1061 return NT_STATUS_ACCESS_DENIED;
1064 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1066 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1068 gss_release_buffer(&min_stat, &output_token);
1070 return NT_STATUS_OK;
1073 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1074 TALLOC_CTX *mem_ctx,
1075 const uint8_t *data, size_t length,
1076 const uint8_t *whole_pdu, size_t pdu_length,
1077 const DATA_BLOB *sig)
1079 struct gensec_gssapi_state *gensec_gssapi_state
1080 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1081 OM_uint32 maj_stat, min_stat;
1082 gss_buffer_desc input_token;
1083 gss_buffer_desc input_message;
1084 gss_qop_t qop_state;
1086 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1088 if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1089 input_message.length = pdu_length;
1090 input_message.value = discard_const(whole_pdu);
1092 input_message.length = length;
1093 input_message.value = discard_const(data);
1096 input_token.length = sig->length;
1097 input_token.value = sig->data;
1099 maj_stat = gss_verify_mic(&min_stat,
1100 gensec_gssapi_state->gssapi_context,
1104 if (GSS_ERROR(maj_stat)) {
1105 DEBUG(1, ("GSS VerifyMic failed: %s\n",
1106 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1107 return NT_STATUS_ACCESS_DENIED;
1110 return NT_STATUS_OK;
1113 /* Try to figure out what features we actually got on the connection */
1114 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1117 struct gensec_gssapi_state *gensec_gssapi_state
1118 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1119 if (feature & GENSEC_FEATURE_SIGN) {
1120 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1121 if (gensec_gssapi_state->sasl
1122 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1123 return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1124 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1126 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1128 if (feature & GENSEC_FEATURE_SEAL) {
1129 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1130 if (gensec_gssapi_state->sasl
1131 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1132 return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1133 && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1135 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1137 if (feature & GENSEC_FEATURE_SESSION_KEY) {
1138 /* Only for GSSAPI/Krb5 */
1139 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1143 if (feature & GENSEC_FEATURE_DCE_STYLE) {
1144 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1146 if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1149 if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1153 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "force_new_spnego", false)) {
1156 if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "disable_new_spnego", false)) {
1160 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1161 if (!NT_STATUS_IS_OK(status)) {
1165 if (gensec_gssapi_state->lucid->protocol == 1) {
1171 /* We can always do async (rather than strict request/reply) packets. */
1172 if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1179 * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1180 * (for encrypting some passwords).
1182 * This breaks all the abstractions, but what do you expect...
1184 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1185 DATA_BLOB *session_key)
1187 struct gensec_gssapi_state *gensec_gssapi_state
1188 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1189 OM_uint32 maj_stat, min_stat;
1190 krb5_keyblock *subkey;
1192 if (gensec_gssapi_state->sasl_state != STAGE_DONE) {
1193 return NT_STATUS_NO_USER_SESSION_KEY;
1196 if (gensec_gssapi_state->session_key.data) {
1197 *session_key = gensec_gssapi_state->session_key;
1198 return NT_STATUS_OK;
1201 maj_stat = gsskrb5_get_subkey(&min_stat,
1202 gensec_gssapi_state->gssapi_context,
1204 if (maj_stat != 0) {
1205 DEBUG(1, ("NO session key for this mech\n"));
1206 return NT_STATUS_NO_USER_SESSION_KEY;
1209 DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1210 (int)KRB5_KEY_LENGTH(subkey),
1211 (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1212 *session_key = data_blob_talloc(gensec_gssapi_state,
1213 KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1214 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1215 gensec_gssapi_state->session_key = *session_key;
1216 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1218 return NT_STATUS_OK;
1221 /* Get some basic (and authorization) information about the user on
1222 * this session. This uses either the PAC (if present) or a local
1223 * database lookup */
1224 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1225 struct auth_session_info **_session_info)
1228 TALLOC_CTX *mem_ctx;
1229 struct gensec_gssapi_state *gensec_gssapi_state
1230 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1231 struct auth_serversupplied_info *server_info = NULL;
1232 struct auth_session_info *session_info = NULL;
1233 OM_uint32 maj_stat, min_stat;
1234 gss_buffer_desc pac;
1237 if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1238 || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1239 gensec_gssapi_state->gss_oid->length) != 0)) {
1240 DEBUG(1, ("NO session info available for this mech\n"));
1241 return NT_STATUS_INVALID_PARAMETER;
1244 mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1245 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1247 maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1248 gensec_gssapi_state->gssapi_context,
1249 KRB5_AUTHDATA_WIN2K_PAC,
1253 if (maj_stat == 0) {
1254 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1255 gss_release_buffer(&min_stat, &pac);
1258 pac_blob = data_blob(NULL, 0);
1261 /* IF we have the PAC - otherwise we need to get this
1262 * data from elsewere - local ldb, or (TODO) lookup of some
1265 if (pac_blob.length) {
1266 nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
1267 gensec_security->settings->iconv_convenience,
1269 gensec_gssapi_state->smb_krb5_context->krb5_context,
1271 if (!NT_STATUS_IS_OK(nt_status)) {
1272 talloc_free(mem_ctx);
1276 gss_buffer_desc name_token;
1277 char *principal_string;
1279 maj_stat = gss_display_name (&min_stat,
1280 gensec_gssapi_state->client_name,
1283 if (GSS_ERROR(maj_stat)) {
1284 DEBUG(1, ("GSS display_name failed: %s\n",
1285 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1286 talloc_free(mem_ctx);
1287 return NT_STATUS_FOOBAR;
1290 principal_string = talloc_strndup(mem_ctx,
1291 (const char *)name_token.value,
1294 gss_release_buffer(&min_stat, &name_token);
1296 if (!principal_string) {
1297 talloc_free(mem_ctx);
1298 return NT_STATUS_NO_MEMORY;
1301 if (gensec_security->auth_context &&
1302 !gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
1303 DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1304 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1305 nt_status = gensec_security->auth_context->get_server_info_principal(mem_ctx,
1306 gensec_security->auth_context,
1310 if (!NT_STATUS_IS_OK(nt_status)) {
1311 talloc_free(mem_ctx);
1315 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1317 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1318 return NT_STATUS_ACCESS_DENIED;
1322 /* references the server_info into the session_info */
1323 nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx,
1324 gensec_security->settings->lp_ctx, server_info, &session_info);
1325 if (!NT_STATUS_IS_OK(nt_status)) {
1326 talloc_free(mem_ctx);
1330 nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1331 if (!NT_STATUS_IS_OK(nt_status)) {
1332 talloc_free(mem_ctx);
1336 if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1337 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1339 krb5_error_code ret;
1340 const char *error_string;
1342 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1343 session_info->credentials = cli_credentials_init(session_info);
1344 if (!session_info->credentials) {
1345 talloc_free(mem_ctx);
1346 return NT_STATUS_NO_MEMORY;
1349 cli_credentials_set_conf(session_info->credentials, gensec_security->settings->lp_ctx);
1350 /* Just so we don't segfault trying to get at a username */
1351 cli_credentials_set_anonymous(session_info->credentials);
1353 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1354 gensec_security->event_ctx,
1355 gensec_security->settings->lp_ctx,
1356 gensec_gssapi_state->delegated_cred_handle,
1357 CRED_SPECIFIED, &error_string);
1359 talloc_free(mem_ctx);
1360 DEBUG(2,("Failed to get gss creds: %s\n", error_string));
1361 return NT_STATUS_NO_MEMORY;
1364 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1365 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1367 /* It has been taken from this place... */
1368 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1370 talloc_steal(gensec_gssapi_state, session_info);
1371 talloc_free(mem_ctx);
1372 *_session_info = session_info;
1374 return NT_STATUS_OK;
1377 static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1379 struct gensec_gssapi_state *gensec_gssapi_state
1380 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1383 if (gensec_gssapi_state->sig_size) {
1384 return gensec_gssapi_state->sig_size;
1387 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1388 gensec_gssapi_state->sig_size = 45;
1390 gensec_gssapi_state->sig_size = 37;
1393 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1394 if (!NT_STATUS_IS_OK(status)) {
1395 return gensec_gssapi_state->sig_size;
1398 if (gensec_gssapi_state->lucid->protocol == 1) {
1399 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1401 * TODO: windows uses 76 here, but we don't know
1402 * gss_wrap works with aes keys yet
1404 gensec_gssapi_state->sig_size = 76;
1406 gensec_gssapi_state->sig_size = 28;
1408 } else if (gensec_gssapi_state->lucid->protocol == 0) {
1409 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1411 case KEYTYPE_ARCFOUR:
1412 case KEYTYPE_ARCFOUR_56:
1413 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1414 gensec_gssapi_state->sig_size = 45;
1416 gensec_gssapi_state->sig_size = 37;
1420 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1421 gensec_gssapi_state->sig_size = 57;
1423 gensec_gssapi_state->sig_size = 49;
1429 return gensec_gssapi_state->sig_size;
1432 static const char *gensec_gssapi_krb5_oids[] = {
1433 GENSEC_OID_KERBEROS5_OLD,
1434 GENSEC_OID_KERBEROS5,
1438 static const char *gensec_gssapi_spnego_oids[] = {
1443 /* As a server, this could in theory accept any GSSAPI mech */
1444 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1445 .name = "gssapi_spnego",
1446 .sasl_name = "GSS-SPNEGO",
1447 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1448 .oid = gensec_gssapi_spnego_oids,
1449 .client_start = gensec_gssapi_client_start,
1450 .server_start = gensec_gssapi_server_start,
1451 .magic = gensec_gssapi_magic,
1452 .update = gensec_gssapi_update,
1453 .session_key = gensec_gssapi_session_key,
1454 .session_info = gensec_gssapi_session_info,
1455 .sign_packet = gensec_gssapi_sign_packet,
1456 .check_packet = gensec_gssapi_check_packet,
1457 .seal_packet = gensec_gssapi_seal_packet,
1458 .unseal_packet = gensec_gssapi_unseal_packet,
1459 .wrap = gensec_gssapi_wrap,
1460 .unwrap = gensec_gssapi_unwrap,
1461 .have_feature = gensec_gssapi_have_feature,
1464 .priority = GENSEC_GSSAPI
1467 /* As a server, this could in theory accept any GSSAPI mech */
1468 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1469 .name = "gssapi_krb5",
1470 .auth_type = DCERPC_AUTH_TYPE_KRB5,
1471 .oid = gensec_gssapi_krb5_oids,
1472 .client_start = gensec_gssapi_client_start,
1473 .server_start = gensec_gssapi_server_start,
1474 .magic = gensec_gssapi_magic,
1475 .update = gensec_gssapi_update,
1476 .session_key = gensec_gssapi_session_key,
1477 .session_info = gensec_gssapi_session_info,
1478 .sig_size = gensec_gssapi_sig_size,
1479 .sign_packet = gensec_gssapi_sign_packet,
1480 .check_packet = gensec_gssapi_check_packet,
1481 .seal_packet = gensec_gssapi_seal_packet,
1482 .unseal_packet = gensec_gssapi_unseal_packet,
1483 .wrap = gensec_gssapi_wrap,
1484 .unwrap = gensec_gssapi_unwrap,
1485 .have_feature = gensec_gssapi_have_feature,
1488 .priority = GENSEC_GSSAPI
1491 /* As a server, this could in theory accept any GSSAPI mech */
1492 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1493 .name = "gssapi_krb5_sasl",
1494 .sasl_name = "GSSAPI",
1495 .client_start = gensec_gssapi_sasl_client_start,
1496 .server_start = gensec_gssapi_sasl_server_start,
1497 .update = gensec_gssapi_update,
1498 .session_key = gensec_gssapi_session_key,
1499 .session_info = gensec_gssapi_session_info,
1500 .max_input_size = gensec_gssapi_max_input_size,
1501 .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1502 .wrap = gensec_gssapi_wrap,
1503 .unwrap = gensec_gssapi_unwrap,
1504 .have_feature = gensec_gssapi_have_feature,
1507 .priority = GENSEC_GSSAPI
1510 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1514 ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1515 if (!NT_STATUS_IS_OK(ret)) {
1516 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1517 gensec_gssapi_spnego_security_ops.name));
1521 ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1522 if (!NT_STATUS_IS_OK(ret)) {
1523 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1524 gensec_gssapi_krb5_security_ops.name));
1528 ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1529 if (!NT_STATUS_IS_OK(ret)) {
1530 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1531 gensec_gssapi_sasl_krb5_security_ops.name));