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 "heimdal/lib/gssapi/gssapi/gssapi.h"
28 #include "auth/kerberos/kerberos.h"
29 #include "librpc/gen_ndr/krb5pac.h"
30 #include "auth/auth.h"
31 #include "lib/ldb/include/ldb.h"
32 #include "auth/auth_sam.h"
33 #include "librpc/rpc/dcerpc.h"
34 #include "auth/credentials/credentials.h"
35 #include "auth/credentials/credentials_krb5.h"
36 #include "auth/gensec/gensec.h"
37 #include "param/param.h"
39 enum gensec_gssapi_sasl_state
43 STAGE_SASL_SSF_ACCEPT,
51 struct gensec_gssapi_state {
52 gss_ctx_id_t gssapi_context;
53 struct gss_channel_bindings_struct *input_chan_bindings;
54 gss_name_t server_name;
55 gss_name_t client_name;
56 OM_uint32 want_flags, got_flags;
59 DATA_BLOB session_key;
62 struct smb_krb5_context *smb_krb5_context;
63 struct gssapi_creds_container *client_cred;
64 struct gssapi_creds_container *server_cred;
66 gss_cred_id_t delegated_cred_handle;
68 bool sasl; /* We have two different mechs in this file: One
69 * for SASL wrapped GSSAPI and another for normal
71 enum gensec_gssapi_sasl_state sasl_state;
72 uint8_t sasl_protection; /* What was negotiated at the SASL
73 * layer, independent of the GSSAPI
76 size_t max_wrap_buf_size;
77 int gss_exchange_count;
80 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
81 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
83 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
84 OM_uint32 maj_stat, OM_uint32 min_stat,
87 OM_uint32 disp_min_stat, disp_maj_stat;
88 gss_buffer_desc maj_error_message;
89 gss_buffer_desc min_error_message;
90 char *maj_error_string, *min_error_string;
91 OM_uint32 msg_ctx = 0;
95 maj_error_message.value = NULL;
96 min_error_message.value = NULL;
97 maj_error_message.length = 0;
98 min_error_message.length = 0;
100 disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
101 mech, &msg_ctx, &maj_error_message);
102 disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
103 mech, &msg_ctx, &min_error_message);
105 maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
107 min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
109 ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
111 talloc_free(maj_error_string);
112 talloc_free(min_error_string);
114 gss_release_buffer(&disp_min_stat, &maj_error_message);
115 gss_release_buffer(&disp_min_stat, &min_error_message);
121 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
123 OM_uint32 maj_stat, min_stat;
125 if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
126 maj_stat = gss_release_cred(&min_stat,
127 &gensec_gssapi_state->delegated_cred_handle);
130 if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
131 maj_stat = gss_delete_sec_context (&min_stat,
132 &gensec_gssapi_state->gssapi_context,
136 if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
137 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
139 if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
140 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
145 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
147 struct gensec_gssapi_state *gensec_gssapi_state;
149 struct gsskrb5_send_to_kdc send_to_kdc;
151 gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
152 if (!gensec_gssapi_state) {
153 return NT_STATUS_NO_MEMORY;
156 gensec_gssapi_state->gss_exchange_count = 0;
157 gensec_gssapi_state->max_wrap_buf_size
158 = lp_parm_int(gensec_security->lp_ctx, NULL, "gensec_gssapi", "max wrap buf size", 65536);
160 gensec_gssapi_state->sasl = false;
161 gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
163 gensec_security->private_data = gensec_gssapi_state;
165 gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
166 gensec_gssapi_state->server_name = GSS_C_NO_NAME;
167 gensec_gssapi_state->client_name = GSS_C_NO_NAME;
169 /* TODO: Fill in channel bindings */
170 gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
172 gensec_gssapi_state->want_flags = 0;
173 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "mutual", true)) {
174 gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
176 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "delegation", true)) {
177 gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
179 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "replay", true)) {
180 gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
182 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "sequence", true)) {
183 gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
186 gensec_gssapi_state->got_flags = 0;
188 gensec_gssapi_state->session_key = data_blob(NULL, 0);
189 gensec_gssapi_state->pac = data_blob(NULL, 0);
191 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
193 talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
195 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
196 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
198 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
199 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
201 if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
202 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
205 gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
207 send_to_kdc.func = smb_krb5_send_and_recv_func;
208 send_to_kdc.ptr = gensec_security->event_ctx;
210 ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
212 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
213 talloc_free(gensec_gssapi_state);
214 return NT_STATUS_INTERNAL_ERROR;
216 if (lp_realm(gensec_security->lp_ctx) && *lp_realm(gensec_security->lp_ctx)) {
217 char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->lp_ctx));
219 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->lp_ctx)));
220 talloc_free(gensec_gssapi_state);
221 return NT_STATUS_NO_MEMORY;
223 ret = gsskrb5_set_default_realm(upper_realm);
224 talloc_free(upper_realm);
226 DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
227 talloc_free(gensec_gssapi_state);
228 return NT_STATUS_INTERNAL_ERROR;
232 /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
233 ret = gsskrb5_set_dns_canonicalize(lp_parm_bool(gensec_security->lp_ctx, NULL, "krb5", "set_dns_canonicalize", false));
235 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
236 talloc_free(gensec_gssapi_state);
237 return NT_STATUS_INTERNAL_ERROR;
240 ret = smb_krb5_init_context(gensec_gssapi_state,
241 gensec_security->event_ctx,
242 gensec_security->lp_ctx,
243 &gensec_gssapi_state->smb_krb5_context);
245 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
246 error_message(ret)));
247 talloc_free(gensec_gssapi_state);
248 return NT_STATUS_INTERNAL_ERROR;
253 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
257 struct gensec_gssapi_state *gensec_gssapi_state;
258 struct cli_credentials *machine_account;
259 struct gssapi_creds_container *gcc;
261 nt_status = gensec_gssapi_start(gensec_security);
262 if (!NT_STATUS_IS_OK(nt_status)) {
266 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
268 machine_account = gensec_get_credentials(gensec_security);
270 if (!machine_account) {
271 DEBUG(3, ("No machine account credentials specified\n"));
272 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
274 ret = cli_credentials_get_server_gss_creds(machine_account, gensec_security->lp_ctx, &gcc);
276 DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
277 error_message(ret)));
278 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
282 gensec_gssapi_state->server_cred = gcc;
287 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
290 struct gensec_gssapi_state *gensec_gssapi_state;
291 nt_status = gensec_gssapi_server_start(gensec_security);
293 if (NT_STATUS_IS_OK(nt_status)) {
294 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
295 gensec_gssapi_state->sasl = true;
300 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
302 struct gensec_gssapi_state *gensec_gssapi_state;
303 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
306 gss_buffer_desc name_token;
308 OM_uint32 maj_stat, min_stat;
309 const char *hostname = gensec_get_target_hostname(gensec_security);
310 const char *principal;
311 struct gssapi_creds_container *gcc;
314 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
315 return NT_STATUS_INVALID_PARAMETER;
317 if (is_ipaddress(hostname)) {
318 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
319 return NT_STATUS_INVALID_PARAMETER;
321 if (strcmp(hostname, "localhost") == 0) {
322 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
323 return NT_STATUS_INVALID_PARAMETER;
326 nt_status = gensec_gssapi_start(gensec_security);
327 if (!NT_STATUS_IS_OK(nt_status)) {
331 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
333 gensec_gssapi_state->gss_oid = gss_mech_krb5;
335 principal = gensec_get_target_principal(gensec_security);
336 if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
337 name_type = GSS_C_NULL_OID;
339 principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
340 gensec_get_target_service(gensec_security),
343 name_type = GSS_C_NT_HOSTBASED_SERVICE;
345 name_token.value = discard_const_p(uint8_t, principal);
346 name_token.length = strlen(principal);
349 maj_stat = gss_import_name (&min_stat,
352 &gensec_gssapi_state->server_name);
354 DEBUG(2, ("GSS Import name of %s failed: %s\n",
355 (char *)name_token.value,
356 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
357 return NT_STATUS_INVALID_PARAMETER;
360 ret = cli_credentials_get_client_gss_creds(creds, gensec_security->lp_ctx, &gcc);
364 case KRB5KDC_ERR_PREAUTH_FAILED:
365 return NT_STATUS_LOGON_FAILURE;
366 case KRB5_KDC_UNREACH:
367 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
368 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
370 DEBUG(1, ("Aquiring initiator credentials failed\n"));
371 return NT_STATUS_UNSUCCESSFUL;
374 gensec_gssapi_state->client_cred = gcc;
375 if (!talloc_reference(gensec_gssapi_state, gcc)) {
376 return NT_STATUS_NO_MEMORY;
382 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
385 struct gensec_gssapi_state *gensec_gssapi_state;
386 nt_status = gensec_gssapi_client_start(gensec_security);
388 if (NT_STATUS_IS_OK(nt_status)) {
389 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
390 gensec_gssapi_state->sasl = true;
397 * Check if the packet is one for this mechansim
399 * @param gensec_security GENSEC state
400 * @param in The request, as a DATA_BLOB
401 * @return Error, INVALID_PARAMETER if it's not a packet for us
402 * or NT_STATUS_OK if the packet is ok.
405 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
408 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
411 return NT_STATUS_INVALID_PARAMETER;
417 * Next state function for the GSSAPI GENSEC mechanism
419 * @param gensec_gssapi_state GSSAPI State
420 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
421 * @param in The request, as a DATA_BLOB
422 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
423 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
424 * or NT_STATUS_OK if the user is authenticated.
427 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
428 TALLOC_CTX *out_mem_ctx,
429 const DATA_BLOB in, DATA_BLOB *out)
431 struct gensec_gssapi_state *gensec_gssapi_state
432 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
433 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
434 OM_uint32 maj_stat, min_stat;
436 gss_buffer_desc input_token, output_token;
437 gss_OID gss_oid_p = NULL;
438 input_token.length = in.length;
439 input_token.value = in.data;
441 switch (gensec_gssapi_state->sasl_state) {
444 switch (gensec_security->gensec_role) {
447 maj_stat = gss_init_sec_context(&min_stat,
448 gensec_gssapi_state->client_cred->creds,
449 &gensec_gssapi_state->gssapi_context,
450 gensec_gssapi_state->server_name,
451 gensec_gssapi_state->gss_oid,
452 gensec_gssapi_state->want_flags,
454 gensec_gssapi_state->input_chan_bindings,
458 &gensec_gssapi_state->got_flags, /* ret flags */
461 gensec_gssapi_state->gss_oid = gss_oid_p;
467 maj_stat = gss_accept_sec_context(&min_stat,
468 &gensec_gssapi_state->gssapi_context,
469 gensec_gssapi_state->server_cred->creds,
471 gensec_gssapi_state->input_chan_bindings,
472 &gensec_gssapi_state->client_name,
475 &gensec_gssapi_state->got_flags,
477 &gensec_gssapi_state->delegated_cred_handle);
479 gensec_gssapi_state->gss_oid = gss_oid_p;
484 return NT_STATUS_INVALID_PARAMETER;
488 gensec_gssapi_state->gss_exchange_count++;
490 if (maj_stat == GSS_S_COMPLETE) {
491 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
492 gss_release_buffer(&min_stat2, &output_token);
494 if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
495 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
497 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
500 /* We may have been invoked as SASL, so there
501 * is more work to do */
502 if (gensec_gssapi_state->sasl) {
503 /* Due to a very subtle interaction
504 * with SASL and the LDAP libs, we
505 * must ensure the data pointer is
506 * != NULL, but the length is 0.
508 * This ensures we send a 'zero
509 * length' (rather than NULL) response
513 out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
516 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
517 return NT_STATUS_MORE_PROCESSING_REQUIRED;
519 gensec_gssapi_state->sasl_state = STAGE_DONE;
521 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
522 DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
523 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
524 DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
526 DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
531 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
532 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
533 gss_release_buffer(&min_stat2, &output_token);
535 return NT_STATUS_MORE_PROCESSING_REQUIRED;
536 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
538 case KRB5_KDC_UNREACH:
539 DEBUG(3, ("Cannot reach a KDC we require: %s\n",
540 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
541 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
542 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
543 DEBUG(3, ("Server is not registered with our KDC: %s\n",
544 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
545 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
546 case KRB5KRB_AP_ERR_MSG_TYPE:
547 /* garbage input, possibly from the auto-mech detection */
548 return NT_STATUS_INVALID_PARAMETER;
550 DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
551 gensec_gssapi_state->gss_exchange_count,
552 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
556 DEBUG(1, ("GSS Update(%d) failed: %s\n",
557 gensec_gssapi_state->gss_exchange_count,
558 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
564 /* These last two stages are only done if we were invoked as SASL */
565 case STAGE_SASL_SSF_NEG:
567 switch (gensec_security->gensec_role) {
570 uint8_t maxlength_proposed[4];
571 uint8_t maxlength_accepted[4];
572 uint8_t security_supported;
575 input_token.length = in.length;
576 input_token.value = in.data;
578 /* As a client, we have just send a
579 * zero-length blob to the server (after the
580 * normal GSSAPI exchange), and it has replied
581 * with it's SASL negotiation */
583 maj_stat = gss_unwrap(&min_stat,
584 gensec_gssapi_state->gssapi_context,
589 if (GSS_ERROR(maj_stat)) {
590 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
591 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
592 return NT_STATUS_ACCESS_DENIED;
595 if (output_token.length < 4) {
596 return NT_STATUS_INVALID_PARAMETER;
599 memcpy(maxlength_proposed, output_token.value, 4);
600 gss_release_buffer(&min_stat, &output_token);
602 /* first byte is the proposed security */
603 security_supported = maxlength_proposed[0];
604 maxlength_proposed[0] = '\0';
606 /* Rest is the proposed max wrap length */
607 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
608 gensec_gssapi_state->max_wrap_buf_size);
609 gensec_gssapi_state->sasl_protection = 0;
610 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
611 if (security_supported & NEG_SEAL) {
612 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
614 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
615 if (security_supported & NEG_SIGN) {
616 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
618 } else if (security_supported & NEG_NONE) {
619 gensec_gssapi_state->sasl_protection |= NEG_NONE;
621 DEBUG(1, ("Remote server does not support unprotected connections"));
622 return NT_STATUS_ACCESS_DENIED;
625 /* Send back the negotiated max length */
627 RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
629 maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
631 input_token.value = maxlength_accepted;
632 input_token.length = sizeof(maxlength_accepted);
634 maj_stat = gss_wrap(&min_stat,
635 gensec_gssapi_state->gssapi_context,
641 if (GSS_ERROR(maj_stat)) {
642 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
643 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
644 return NT_STATUS_ACCESS_DENIED;
647 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
648 gss_release_buffer(&min_stat, &output_token);
650 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
651 gensec_gssapi_state->sasl_state = STAGE_DONE;
653 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
654 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
655 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
656 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
658 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
665 uint8_t maxlength_proposed[4];
666 uint8_t security_supported = 0x0;
669 /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
670 if (in.length != 0) {
671 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
674 /* Give the client some idea what we will support */
676 RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
677 /* first byte is the proposed security */
678 maxlength_proposed[0] = '\0';
680 gensec_gssapi_state->sasl_protection = 0;
681 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
682 security_supported |= NEG_SEAL;
684 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
685 security_supported |= NEG_SIGN;
687 if (security_supported == 0) {
688 /* If we don't support anything, this must be 0 */
689 RSIVAL(maxlength_proposed, 0, 0x0);
692 /* TODO: We may not wish to support this */
693 security_supported |= NEG_NONE;
694 maxlength_proposed[0] = security_supported;
696 input_token.value = maxlength_proposed;
697 input_token.length = sizeof(maxlength_proposed);
699 maj_stat = gss_wrap(&min_stat,
700 gensec_gssapi_state->gssapi_context,
706 if (GSS_ERROR(maj_stat)) {
707 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
708 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
709 return NT_STATUS_ACCESS_DENIED;
712 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
713 gss_release_buffer(&min_stat, &output_token);
715 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
716 return NT_STATUS_MORE_PROCESSING_REQUIRED;
719 return NT_STATUS_INVALID_PARAMETER;
723 /* This is s server-only stage */
724 case STAGE_SASL_SSF_ACCEPT:
726 uint8_t maxlength_accepted[4];
727 uint8_t security_accepted;
730 input_token.length = in.length;
731 input_token.value = in.data;
733 maj_stat = gss_unwrap(&min_stat,
734 gensec_gssapi_state->gssapi_context,
739 if (GSS_ERROR(maj_stat)) {
740 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
741 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
742 return NT_STATUS_ACCESS_DENIED;
745 if (output_token.length < 4) {
746 return NT_STATUS_INVALID_PARAMETER;
749 memcpy(maxlength_accepted, output_token.value, 4);
750 gss_release_buffer(&min_stat, &output_token);
752 /* first byte is the proposed security */
753 security_accepted = maxlength_accepted[0];
754 maxlength_accepted[0] = '\0';
756 /* Rest is the proposed max wrap length */
757 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
758 gensec_gssapi_state->max_wrap_buf_size);
760 gensec_gssapi_state->sasl_protection = 0;
761 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
762 if (security_accepted & NEG_SEAL) {
763 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
765 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
766 if (security_accepted & NEG_SIGN) {
767 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
769 } else if (security_accepted & NEG_NONE) {
770 gensec_gssapi_state->sasl_protection |= NEG_NONE;
772 DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
773 return NT_STATUS_ACCESS_DENIED;
776 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
777 gensec_gssapi_state->sasl_state = STAGE_DONE;
778 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
779 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
780 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
781 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
783 DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
786 *out = data_blob(NULL, 0);
790 return NT_STATUS_INVALID_PARAMETER;
794 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
799 struct gensec_gssapi_state *gensec_gssapi_state
800 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
801 OM_uint32 maj_stat, min_stat;
802 gss_buffer_desc input_token, output_token;
804 input_token.length = in->length;
805 input_token.value = in->data;
807 maj_stat = gss_wrap(&min_stat,
808 gensec_gssapi_state->gssapi_context,
809 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
814 if (GSS_ERROR(maj_stat)) {
815 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
816 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
817 return NT_STATUS_ACCESS_DENIED;
820 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
821 gss_release_buffer(&min_stat, &output_token);
823 if (gensec_gssapi_state->sasl) {
824 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
825 if (max_wrapped_size < out->length) {
826 DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
827 (unsigned)in->length,
828 (unsigned)out->length,
829 (unsigned int)max_wrapped_size));
830 return NT_STATUS_INVALID_PARAMETER;
834 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
836 return NT_STATUS_ACCESS_DENIED;
841 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
846 struct gensec_gssapi_state *gensec_gssapi_state
847 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
848 OM_uint32 maj_stat, min_stat;
849 gss_buffer_desc input_token, output_token;
852 input_token.length = in->length;
853 input_token.value = in->data;
855 if (gensec_gssapi_state->sasl) {
856 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
857 if (max_wrapped_size < in->length) {
858 DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
859 return NT_STATUS_INVALID_PARAMETER;
863 maj_stat = gss_unwrap(&min_stat,
864 gensec_gssapi_state->gssapi_context,
869 if (GSS_ERROR(maj_stat)) {
870 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
871 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
872 return NT_STATUS_ACCESS_DENIED;
875 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
876 gss_release_buffer(&min_stat, &output_token);
878 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
880 return NT_STATUS_ACCESS_DENIED;
885 /* Find out the maximum input size negotiated on this connection */
887 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
889 struct gensec_gssapi_state *gensec_gssapi_state
890 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
891 OM_uint32 maj_stat, min_stat;
892 OM_uint32 max_input_size;
894 maj_stat = gss_wrap_size_limit(&min_stat,
895 gensec_gssapi_state->gssapi_context,
896 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
898 gensec_gssapi_state->max_wrap_buf_size,
900 if (GSS_ERROR(maj_stat)) {
901 TALLOC_CTX *mem_ctx = talloc_new(NULL);
902 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
903 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
904 talloc_free(mem_ctx);
908 return max_input_size;
911 /* Find out the maximum output size negotiated on this connection */
912 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
914 struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
915 return gensec_gssapi_state->max_wrap_buf_size;
918 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
920 uint8_t *data, size_t length,
921 const uint8_t *whole_pdu, size_t pdu_length,
924 struct gensec_gssapi_state *gensec_gssapi_state
925 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
926 OM_uint32 maj_stat, min_stat;
927 gss_buffer_desc input_token, output_token;
931 input_token.length = length;
932 input_token.value = data;
934 maj_stat = gss_wrap(&min_stat,
935 gensec_gssapi_state->gssapi_context,
936 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
941 if (GSS_ERROR(maj_stat)) {
942 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
943 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
944 return NT_STATUS_ACCESS_DENIED;
947 if (output_token.length < input_token.length) {
948 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
949 (long)output_token.length, (long)length));
950 return NT_STATUS_INTERNAL_ERROR;
952 sig_length = output_token.length - input_token.length;
954 memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
955 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
957 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
958 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
959 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
961 gss_release_buffer(&min_stat, &output_token);
963 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
965 return NT_STATUS_ACCESS_DENIED;
970 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
972 uint8_t *data, size_t length,
973 const uint8_t *whole_pdu, size_t pdu_length,
974 const DATA_BLOB *sig)
976 struct gensec_gssapi_state *gensec_gssapi_state
977 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
978 OM_uint32 maj_stat, min_stat;
979 gss_buffer_desc input_token, output_token;
984 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
986 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
988 memcpy(in.data, sig->data, sig->length);
989 memcpy(in.data + sig->length, data, length);
991 input_token.length = in.length;
992 input_token.value = in.data;
994 maj_stat = gss_unwrap(&min_stat,
995 gensec_gssapi_state->gssapi_context,
1000 if (GSS_ERROR(maj_stat)) {
1001 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1002 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1003 return NT_STATUS_ACCESS_DENIED;
1006 if (output_token.length != length) {
1007 return NT_STATUS_INTERNAL_ERROR;
1010 memcpy(data, output_token.value, length);
1012 gss_release_buffer(&min_stat, &output_token);
1014 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1016 return NT_STATUS_ACCESS_DENIED;
1018 return NT_STATUS_OK;
1021 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1022 TALLOC_CTX *mem_ctx,
1023 const uint8_t *data, size_t length,
1024 const uint8_t *whole_pdu, size_t pdu_length,
1027 struct gensec_gssapi_state *gensec_gssapi_state
1028 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1029 OM_uint32 maj_stat, min_stat;
1030 gss_buffer_desc input_token, output_token;
1032 ssize_t sig_length = 0;
1034 input_token.length = length;
1035 input_token.value = discard_const_p(uint8_t *, data);
1037 maj_stat = gss_wrap(&min_stat,
1038 gensec_gssapi_state->gssapi_context,
1044 if (GSS_ERROR(maj_stat)) {
1045 DEBUG(1, ("GSS Wrap failed: %s\n",
1046 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1047 return NT_STATUS_ACCESS_DENIED;
1050 if (output_token.length < input_token.length) {
1051 DEBUG(1, ("gensec_gssapi_sign_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
1052 (long)output_token.length, (long)length));
1053 return NT_STATUS_INTERNAL_ERROR;
1056 /* Caller must pad to right boundary */
1057 sig_length = output_token.length - input_token.length;
1059 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
1061 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1063 gss_release_buffer(&min_stat, &output_token);
1065 return NT_STATUS_OK;
1068 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1069 TALLOC_CTX *mem_ctx,
1070 const uint8_t *data, size_t length,
1071 const uint8_t *whole_pdu, size_t pdu_length,
1072 const DATA_BLOB *sig)
1074 struct gensec_gssapi_state *gensec_gssapi_state
1075 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1076 OM_uint32 maj_stat, min_stat;
1077 gss_buffer_desc input_token, output_token;
1079 gss_qop_t qop_state;
1082 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1084 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
1086 memcpy(in.data, sig->data, sig->length);
1087 memcpy(in.data + sig->length, data, length);
1089 input_token.length = in.length;
1090 input_token.value = in.data;
1092 maj_stat = gss_unwrap(&min_stat,
1093 gensec_gssapi_state->gssapi_context,
1098 if (GSS_ERROR(maj_stat)) {
1099 DEBUG(1, ("GSS UnWrap failed: %s\n",
1100 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1101 return NT_STATUS_ACCESS_DENIED;
1104 if (output_token.length != length) {
1105 return NT_STATUS_INTERNAL_ERROR;
1108 gss_release_buffer(&min_stat, &output_token);
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 /* We can always do async (rather than strict request/reply) packets. */
1147 if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1154 * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1155 * (for encrypting some passwords).
1157 * This breaks all the abstractions, but what do you expect...
1159 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1160 DATA_BLOB *session_key)
1162 struct gensec_gssapi_state *gensec_gssapi_state
1163 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1164 OM_uint32 maj_stat, min_stat;
1165 krb5_keyblock *subkey;
1167 if (gensec_gssapi_state->session_key.data) {
1168 *session_key = gensec_gssapi_state->session_key;
1169 return NT_STATUS_OK;
1172 maj_stat = gsskrb5_get_initiator_subkey(&min_stat,
1173 gensec_gssapi_state->gssapi_context,
1175 if (maj_stat != 0) {
1176 DEBUG(1, ("NO session key for this mech\n"));
1177 return NT_STATUS_NO_USER_SESSION_KEY;
1180 DEBUG(10, ("Got KRB5 session key of length %d\n",
1181 (int)KRB5_KEY_LENGTH(subkey)));
1182 gensec_gssapi_state->session_key = data_blob_talloc(gensec_gssapi_state,
1183 KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1184 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1185 *session_key = gensec_gssapi_state->session_key;
1186 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1188 return NT_STATUS_OK;
1191 /* Get some basic (and authorization) information about the user on
1192 * this session. This uses either the PAC (if present) or a local
1193 * database lookup */
1194 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1195 struct auth_session_info **_session_info)
1198 TALLOC_CTX *mem_ctx;
1199 struct gensec_gssapi_state *gensec_gssapi_state
1200 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1201 struct auth_serversupplied_info *server_info = NULL;
1202 struct auth_session_info *session_info = NULL;
1203 struct PAC_LOGON_INFO *logon_info;
1204 OM_uint32 maj_stat, min_stat;
1205 gss_buffer_desc name_token;
1206 gss_buffer_desc pac;
1207 krb5_keyblock *keyblock;
1209 krb5_principal principal;
1210 char *principal_string;
1213 if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1214 || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1215 gensec_gssapi_state->gss_oid->length) != 0)) {
1216 DEBUG(1, ("NO session info available for this mech\n"));
1217 return NT_STATUS_INVALID_PARAMETER;
1220 mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1221 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1223 maj_stat = gss_display_name (&min_stat,
1224 gensec_gssapi_state->client_name,
1227 if (GSS_ERROR(maj_stat)) {
1228 DEBUG(1, ("GSS display_name failed: %s\n",
1229 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1230 talloc_free(mem_ctx);
1231 return NT_STATUS_FOOBAR;
1234 principal_string = talloc_strndup(mem_ctx,
1235 (const char *)name_token.value,
1238 gss_release_buffer(&min_stat, &name_token);
1240 if (!principal_string) {
1241 talloc_free(mem_ctx);
1242 return NT_STATUS_NO_MEMORY;
1245 maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1246 gensec_gssapi_state->gssapi_context,
1247 KRB5_AUTHDATA_WIN2K_PAC,
1251 if (maj_stat == 0) {
1252 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1253 gss_release_buffer(&min_stat, &pac);
1256 pac_blob = data_blob(NULL, 0);
1259 /* IF we have the PAC - otherwise we need to get this
1260 * data from elsewere - local ldb, or (TODO) lookup of some
1263 if (pac_blob.length) {
1264 krb5_error_code ret;
1265 union netr_Validation validation;
1267 maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
1268 gensec_gssapi_state->gssapi_context,
1271 if (GSS_ERROR(maj_stat)) {
1272 DEBUG(1, ("gsskrb5_extract_authtime_from_sec_context: %s\n",
1273 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1274 talloc_free(mem_ctx);
1275 return NT_STATUS_FOOBAR;
1278 maj_stat = gsskrb5_extract_service_keyblock(&min_stat,
1279 gensec_gssapi_state->gssapi_context,
1282 if (GSS_ERROR(maj_stat)) {
1283 DEBUG(1, ("gsskrb5_copy_service_keyblock failed: %s\n",
1284 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1285 talloc_free(mem_ctx);
1286 return NT_STATUS_FOOBAR;
1289 ret = krb5_parse_name_flags(gensec_gssapi_state->smb_krb5_context->krb5_context,
1291 KRB5_PRINCIPAL_PARSE_MUST_REALM,
1294 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1296 talloc_free(mem_ctx);
1297 return NT_STATUS_INVALID_PARAMETER;
1300 /* decode and verify the pac */
1301 nt_status = kerberos_pac_logon_info(mem_ctx, &logon_info, pac_blob,
1302 gensec_gssapi_state->smb_krb5_context->krb5_context,
1303 NULL, keyblock, principal, authtime, NULL);
1304 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
1305 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1308 if (!NT_STATUS_IS_OK(nt_status)) {
1309 talloc_free(mem_ctx);
1312 validation.sam3 = &logon_info->info3;
1313 nt_status = make_server_info_netlogon_validation(gensec_gssapi_state,
1317 if (!NT_STATUS_IS_OK(nt_status)) {
1318 talloc_free(mem_ctx);
1321 } else if (!lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
1322 DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1323 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1324 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->lp_ctx, principal_string,
1327 if (!NT_STATUS_IS_OK(nt_status)) {
1328 talloc_free(mem_ctx);
1332 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1334 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1335 return NT_STATUS_ACCESS_DENIED;
1338 /* references the server_info into the session_info */
1339 nt_status = auth_generate_session_info(mem_ctx, gensec_security->lp_ctx, server_info, &session_info);
1340 if (!NT_STATUS_IS_OK(nt_status)) {
1341 talloc_free(mem_ctx);
1345 nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1346 if (!NT_STATUS_IS_OK(nt_status)) {
1347 talloc_free(mem_ctx);
1351 if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1352 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1354 krb5_error_code ret;
1355 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1356 session_info->credentials = cli_credentials_init(session_info);
1357 if (!session_info->credentials) {
1358 talloc_free(mem_ctx);
1359 return NT_STATUS_NO_MEMORY;
1362 cli_credentials_set_event_context(session_info->credentials, gensec_security->event_ctx);
1363 cli_credentials_set_conf(session_info->credentials, gensec_security->lp_ctx);
1364 /* Just so we don't segfault trying to get at a username */
1365 cli_credentials_set_anonymous(session_info->credentials);
1367 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1368 gensec_security->lp_ctx,
1369 gensec_gssapi_state->delegated_cred_handle,
1372 talloc_free(mem_ctx);
1373 return NT_STATUS_NO_MEMORY;
1376 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1377 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1379 /* It has been taken from this place... */
1380 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1382 talloc_steal(gensec_gssapi_state, session_info);
1383 talloc_free(mem_ctx);
1384 *_session_info = session_info;
1386 return NT_STATUS_OK;
1389 static const char *gensec_gssapi_krb5_oids[] = {
1390 GENSEC_OID_KERBEROS5_OLD,
1391 GENSEC_OID_KERBEROS5,
1395 static const char *gensec_gssapi_spnego_oids[] = {
1400 /* As a server, this could in theory accept any GSSAPI mech */
1401 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1402 .name = "gssapi_spnego",
1403 .sasl_name = "GSS-SPNEGO",
1404 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1405 .oid = gensec_gssapi_spnego_oids,
1406 .client_start = gensec_gssapi_client_start,
1407 .server_start = gensec_gssapi_server_start,
1408 .magic = gensec_gssapi_magic,
1409 .update = gensec_gssapi_update,
1410 .session_key = gensec_gssapi_session_key,
1411 .session_info = gensec_gssapi_session_info,
1412 .sign_packet = gensec_gssapi_sign_packet,
1413 .check_packet = gensec_gssapi_check_packet,
1414 .seal_packet = gensec_gssapi_seal_packet,
1415 .unseal_packet = gensec_gssapi_unseal_packet,
1416 .wrap = gensec_gssapi_wrap,
1417 .unwrap = gensec_gssapi_unwrap,
1418 .have_feature = gensec_gssapi_have_feature,
1421 .priority = GENSEC_GSSAPI
1424 /* As a server, this could in theory accept any GSSAPI mech */
1425 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1426 .name = "gssapi_krb5",
1427 .auth_type = DCERPC_AUTH_TYPE_KRB5,
1428 .oid = gensec_gssapi_krb5_oids,
1429 .client_start = gensec_gssapi_client_start,
1430 .server_start = gensec_gssapi_server_start,
1431 .magic = gensec_gssapi_magic,
1432 .update = gensec_gssapi_update,
1433 .session_key = gensec_gssapi_session_key,
1434 .session_info = gensec_gssapi_session_info,
1435 .sign_packet = gensec_gssapi_sign_packet,
1436 .check_packet = gensec_gssapi_check_packet,
1437 .seal_packet = gensec_gssapi_seal_packet,
1438 .unseal_packet = gensec_gssapi_unseal_packet,
1439 .wrap = gensec_gssapi_wrap,
1440 .unwrap = gensec_gssapi_unwrap,
1441 .have_feature = gensec_gssapi_have_feature,
1444 .priority = GENSEC_GSSAPI
1447 /* As a server, this could in theory accept any GSSAPI mech */
1448 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1449 .name = "gssapi_krb5_sasl",
1450 .sasl_name = "GSSAPI",
1451 .client_start = gensec_gssapi_sasl_client_start,
1452 .server_start = gensec_gssapi_sasl_server_start,
1453 .update = gensec_gssapi_update,
1454 .session_key = gensec_gssapi_session_key,
1455 .session_info = gensec_gssapi_session_info,
1456 .max_input_size = gensec_gssapi_max_input_size,
1457 .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1458 .wrap = gensec_gssapi_wrap,
1459 .unwrap = gensec_gssapi_unwrap,
1460 .have_feature = gensec_gssapi_have_feature,
1463 .priority = GENSEC_GSSAPI
1466 NTSTATUS gensec_gssapi_init(void)
1470 ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1471 if (!NT_STATUS_IS_OK(ret)) {
1472 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1473 gensec_gssapi_spnego_security_ops.name));
1477 ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1478 if (!NT_STATUS_IS_OK(ret)) {
1479 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1480 gensec_gssapi_krb5_security_ops.name));
1484 ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1485 if (!NT_STATUS_IS_OK(ret)) {
1486 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1487 gensec_gssapi_sasl_krb5_security_ops.name));