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 "auth/gensec/gensec_gssapi.h"
43 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
44 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
46 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
47 OM_uint32 maj_stat, OM_uint32 min_stat,
50 OM_uint32 disp_min_stat, disp_maj_stat;
51 gss_buffer_desc maj_error_message;
52 gss_buffer_desc min_error_message;
53 char *maj_error_string, *min_error_string;
54 OM_uint32 msg_ctx = 0;
58 maj_error_message.value = NULL;
59 min_error_message.value = NULL;
60 maj_error_message.length = 0;
61 min_error_message.length = 0;
63 disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
64 mech, &msg_ctx, &maj_error_message);
65 disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
66 mech, &msg_ctx, &min_error_message);
68 maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
70 min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
72 ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
74 talloc_free(maj_error_string);
75 talloc_free(min_error_string);
77 gss_release_buffer(&disp_min_stat, &maj_error_message);
78 gss_release_buffer(&disp_min_stat, &min_error_message);
84 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
86 OM_uint32 maj_stat, min_stat;
88 if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
89 maj_stat = gss_release_cred(&min_stat,
90 &gensec_gssapi_state->delegated_cred_handle);
93 if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
94 maj_stat = gss_delete_sec_context (&min_stat,
95 &gensec_gssapi_state->gssapi_context,
99 if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
100 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
102 if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
103 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
106 if (gensec_gssapi_state->lucid) {
107 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
113 static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
115 OM_uint32 maj_stat, min_stat;
117 if (gensec_gssapi_state->lucid) {
121 maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
122 &gensec_gssapi_state->gssapi_context,
124 (void **)&gensec_gssapi_state->lucid);
125 if (maj_stat != GSS_S_COMPLETE) {
126 DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
127 gssapi_error_string(gensec_gssapi_state,
129 gensec_gssapi_state->gss_oid)));
130 return NT_STATUS_INTERNAL_ERROR;
133 if (gensec_gssapi_state->lucid->version != 1) {
134 DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
135 gensec_gssapi_state->lucid->version));
136 gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
137 gensec_gssapi_state->lucid = NULL;
138 return NT_STATUS_INTERNAL_ERROR;
144 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
146 struct gensec_gssapi_state *gensec_gssapi_state;
148 struct gsskrb5_send_to_kdc send_to_kdc;
150 gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
151 if (!gensec_gssapi_state) {
152 return NT_STATUS_NO_MEMORY;
155 gensec_gssapi_state->gss_exchange_count = 0;
156 gensec_gssapi_state->max_wrap_buf_size
157 = lp_parm_int(gensec_security->lp_ctx, NULL, "gensec_gssapi", "max wrap buf size", 65536);
159 gensec_gssapi_state->sasl = false;
160 gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
162 gensec_security->private_data = gensec_gssapi_state;
164 gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
165 gensec_gssapi_state->server_name = GSS_C_NO_NAME;
166 gensec_gssapi_state->client_name = GSS_C_NO_NAME;
167 gensec_gssapi_state->lucid = NULL;
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;
192 gensec_gssapi_state->sig_size = 0;
194 talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
196 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
197 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
199 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
200 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
202 if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
203 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
206 gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
208 send_to_kdc.func = smb_krb5_send_and_recv_func;
209 send_to_kdc.ptr = gensec_security->event_ctx;
211 ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
213 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
214 talloc_free(gensec_gssapi_state);
215 return NT_STATUS_INTERNAL_ERROR;
217 if (lp_realm(gensec_security->lp_ctx) && *lp_realm(gensec_security->lp_ctx)) {
218 char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->lp_ctx));
220 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->lp_ctx)));
221 talloc_free(gensec_gssapi_state);
222 return NT_STATUS_NO_MEMORY;
224 ret = gsskrb5_set_default_realm(upper_realm);
225 talloc_free(upper_realm);
227 DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
228 talloc_free(gensec_gssapi_state);
229 return NT_STATUS_INTERNAL_ERROR;
233 /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
234 ret = gsskrb5_set_dns_canonicalize(lp_parm_bool(gensec_security->lp_ctx, NULL, "krb5", "set_dns_canonicalize", false));
236 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
237 talloc_free(gensec_gssapi_state);
238 return NT_STATUS_INTERNAL_ERROR;
241 ret = smb_krb5_init_context(gensec_gssapi_state,
242 gensec_security->event_ctx,
243 gensec_security->lp_ctx,
244 &gensec_gssapi_state->smb_krb5_context);
246 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
247 error_message(ret)));
248 talloc_free(gensec_gssapi_state);
249 return NT_STATUS_INTERNAL_ERROR;
254 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
258 struct gensec_gssapi_state *gensec_gssapi_state;
259 struct cli_credentials *machine_account;
260 struct gssapi_creds_container *gcc;
262 nt_status = gensec_gssapi_start(gensec_security);
263 if (!NT_STATUS_IS_OK(nt_status)) {
267 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
269 machine_account = gensec_get_credentials(gensec_security);
271 if (!machine_account) {
272 DEBUG(3, ("No machine account credentials specified\n"));
273 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
275 ret = cli_credentials_get_server_gss_creds(machine_account,
276 gensec_security->event_ctx,
277 gensec_security->lp_ctx, &gcc);
279 DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
280 error_message(ret)));
281 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
285 gensec_gssapi_state->server_cred = gcc;
290 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
293 struct gensec_gssapi_state *gensec_gssapi_state;
294 nt_status = gensec_gssapi_server_start(gensec_security);
296 if (NT_STATUS_IS_OK(nt_status)) {
297 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
298 gensec_gssapi_state->sasl = true;
303 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
305 struct gensec_gssapi_state *gensec_gssapi_state;
306 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
309 gss_buffer_desc name_token;
311 OM_uint32 maj_stat, min_stat;
312 const char *hostname = gensec_get_target_hostname(gensec_security);
313 const char *principal;
314 struct gssapi_creds_container *gcc;
317 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
318 return NT_STATUS_INVALID_PARAMETER;
320 if (is_ipaddress(hostname)) {
321 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
322 return NT_STATUS_INVALID_PARAMETER;
324 if (strcmp(hostname, "localhost") == 0) {
325 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
326 return NT_STATUS_INVALID_PARAMETER;
329 nt_status = gensec_gssapi_start(gensec_security);
330 if (!NT_STATUS_IS_OK(nt_status)) {
334 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
336 gensec_gssapi_state->gss_oid = gss_mech_krb5;
338 principal = gensec_get_target_principal(gensec_security);
339 if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
340 name_type = GSS_C_NULL_OID;
342 principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
343 gensec_get_target_service(gensec_security),
346 name_type = GSS_C_NT_HOSTBASED_SERVICE;
348 name_token.value = discard_const_p(uint8_t, principal);
349 name_token.length = strlen(principal);
352 maj_stat = gss_import_name (&min_stat,
355 &gensec_gssapi_state->server_name);
357 DEBUG(2, ("GSS Import name of %s failed: %s\n",
358 (char *)name_token.value,
359 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
360 return NT_STATUS_INVALID_PARAMETER;
363 ret = cli_credentials_get_client_gss_creds(creds,
364 gensec_security->event_ctx,
365 gensec_security->lp_ctx, &gcc);
369 case KRB5KDC_ERR_PREAUTH_FAILED:
370 return NT_STATUS_LOGON_FAILURE;
371 case KRB5_KDC_UNREACH:
372 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
373 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
375 DEBUG(1, ("Aquiring initiator credentials failed\n"));
376 return NT_STATUS_UNSUCCESSFUL;
379 gensec_gssapi_state->client_cred = gcc;
380 if (!talloc_reference(gensec_gssapi_state, gcc)) {
381 return NT_STATUS_NO_MEMORY;
387 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
390 struct gensec_gssapi_state *gensec_gssapi_state;
391 nt_status = gensec_gssapi_client_start(gensec_security);
393 if (NT_STATUS_IS_OK(nt_status)) {
394 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
395 gensec_gssapi_state->sasl = true;
402 * Check if the packet is one for this mechansim
404 * @param gensec_security GENSEC state
405 * @param in The request, as a DATA_BLOB
406 * @return Error, INVALID_PARAMETER if it's not a packet for us
407 * or NT_STATUS_OK if the packet is ok.
410 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
413 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
416 return NT_STATUS_INVALID_PARAMETER;
422 * Next state function for the GSSAPI GENSEC mechanism
424 * @param gensec_gssapi_state GSSAPI State
425 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
426 * @param in The request, as a DATA_BLOB
427 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
428 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
429 * or NT_STATUS_OK if the user is authenticated.
432 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
433 TALLOC_CTX *out_mem_ctx,
434 const DATA_BLOB in, DATA_BLOB *out)
436 struct gensec_gssapi_state *gensec_gssapi_state
437 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
438 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
439 OM_uint32 maj_stat, min_stat;
441 gss_buffer_desc input_token, output_token;
442 gss_OID gss_oid_p = NULL;
443 input_token.length = in.length;
444 input_token.value = in.data;
446 switch (gensec_gssapi_state->sasl_state) {
449 switch (gensec_security->gensec_role) {
452 maj_stat = gss_init_sec_context(&min_stat,
453 gensec_gssapi_state->client_cred->creds,
454 &gensec_gssapi_state->gssapi_context,
455 gensec_gssapi_state->server_name,
456 gensec_gssapi_state->gss_oid,
457 gensec_gssapi_state->want_flags,
459 gensec_gssapi_state->input_chan_bindings,
463 &gensec_gssapi_state->got_flags, /* ret flags */
466 gensec_gssapi_state->gss_oid = gss_oid_p;
472 maj_stat = gss_accept_sec_context(&min_stat,
473 &gensec_gssapi_state->gssapi_context,
474 gensec_gssapi_state->server_cred->creds,
476 gensec_gssapi_state->input_chan_bindings,
477 &gensec_gssapi_state->client_name,
480 &gensec_gssapi_state->got_flags,
482 &gensec_gssapi_state->delegated_cred_handle);
484 gensec_gssapi_state->gss_oid = gss_oid_p;
489 return NT_STATUS_INVALID_PARAMETER;
493 gensec_gssapi_state->gss_exchange_count++;
495 if (maj_stat == GSS_S_COMPLETE) {
496 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
497 gss_release_buffer(&min_stat2, &output_token);
499 if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
500 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
502 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
505 /* We may have been invoked as SASL, so there
506 * is more work to do */
507 if (gensec_gssapi_state->sasl) {
508 /* Due to a very subtle interaction
509 * with SASL and the LDAP libs, we
510 * must ensure the data pointer is
511 * != NULL, but the length is 0.
513 * This ensures we send a 'zero
514 * length' (rather than NULL) response
518 out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
521 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
522 return NT_STATUS_MORE_PROCESSING_REQUIRED;
524 gensec_gssapi_state->sasl_state = STAGE_DONE;
526 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
527 DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
528 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
529 DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
531 DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
536 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
537 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
538 gss_release_buffer(&min_stat2, &output_token);
540 return NT_STATUS_MORE_PROCESSING_REQUIRED;
541 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
543 case KRB5_KDC_UNREACH:
544 DEBUG(3, ("Cannot reach a KDC we require: %s\n",
545 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
546 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
547 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
548 DEBUG(3, ("Server is not registered with our KDC: %s\n",
549 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
550 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
551 case KRB5KRB_AP_ERR_MSG_TYPE:
552 /* garbage input, possibly from the auto-mech detection */
553 return NT_STATUS_INVALID_PARAMETER;
555 DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
556 gensec_gssapi_state->gss_exchange_count,
557 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
561 DEBUG(1, ("GSS Update(%d) failed: %s\n",
562 gensec_gssapi_state->gss_exchange_count,
563 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
569 /* These last two stages are only done if we were invoked as SASL */
570 case STAGE_SASL_SSF_NEG:
572 switch (gensec_security->gensec_role) {
575 uint8_t maxlength_proposed[4];
576 uint8_t maxlength_accepted[4];
577 uint8_t security_supported;
580 input_token.length = in.length;
581 input_token.value = in.data;
583 /* As a client, we have just send a
584 * zero-length blob to the server (after the
585 * normal GSSAPI exchange), and it has replied
586 * with it's SASL negotiation */
588 maj_stat = gss_unwrap(&min_stat,
589 gensec_gssapi_state->gssapi_context,
594 if (GSS_ERROR(maj_stat)) {
595 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
596 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
597 return NT_STATUS_ACCESS_DENIED;
600 if (output_token.length < 4) {
601 return NT_STATUS_INVALID_PARAMETER;
604 memcpy(maxlength_proposed, output_token.value, 4);
605 gss_release_buffer(&min_stat, &output_token);
607 /* first byte is the proposed security */
608 security_supported = maxlength_proposed[0];
609 maxlength_proposed[0] = '\0';
611 /* Rest is the proposed max wrap length */
612 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
613 gensec_gssapi_state->max_wrap_buf_size);
614 gensec_gssapi_state->sasl_protection = 0;
615 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
616 if (security_supported & NEG_SEAL) {
617 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
619 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
620 if (security_supported & NEG_SIGN) {
621 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
623 } else if (security_supported & NEG_NONE) {
624 gensec_gssapi_state->sasl_protection |= NEG_NONE;
626 DEBUG(1, ("Remote server does not support unprotected connections"));
627 return NT_STATUS_ACCESS_DENIED;
630 /* Send back the negotiated max length */
632 RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
634 maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
636 input_token.value = maxlength_accepted;
637 input_token.length = sizeof(maxlength_accepted);
639 maj_stat = gss_wrap(&min_stat,
640 gensec_gssapi_state->gssapi_context,
646 if (GSS_ERROR(maj_stat)) {
647 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
648 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
649 return NT_STATUS_ACCESS_DENIED;
652 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
653 gss_release_buffer(&min_stat, &output_token);
655 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
656 gensec_gssapi_state->sasl_state = STAGE_DONE;
658 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
659 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
660 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
661 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
663 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
670 uint8_t maxlength_proposed[4];
671 uint8_t security_supported = 0x0;
674 /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
675 if (in.length != 0) {
676 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
679 /* Give the client some idea what we will support */
681 RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
682 /* first byte is the proposed security */
683 maxlength_proposed[0] = '\0';
685 gensec_gssapi_state->sasl_protection = 0;
686 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
687 security_supported |= NEG_SEAL;
689 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
690 security_supported |= NEG_SIGN;
692 if (security_supported == 0) {
693 /* If we don't support anything, this must be 0 */
694 RSIVAL(maxlength_proposed, 0, 0x0);
697 /* TODO: We may not wish to support this */
698 security_supported |= NEG_NONE;
699 maxlength_proposed[0] = security_supported;
701 input_token.value = maxlength_proposed;
702 input_token.length = sizeof(maxlength_proposed);
704 maj_stat = gss_wrap(&min_stat,
705 gensec_gssapi_state->gssapi_context,
711 if (GSS_ERROR(maj_stat)) {
712 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
713 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
714 return NT_STATUS_ACCESS_DENIED;
717 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
718 gss_release_buffer(&min_stat, &output_token);
720 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
721 return NT_STATUS_MORE_PROCESSING_REQUIRED;
724 return NT_STATUS_INVALID_PARAMETER;
728 /* This is s server-only stage */
729 case STAGE_SASL_SSF_ACCEPT:
731 uint8_t maxlength_accepted[4];
732 uint8_t security_accepted;
735 input_token.length = in.length;
736 input_token.value = in.data;
738 maj_stat = gss_unwrap(&min_stat,
739 gensec_gssapi_state->gssapi_context,
744 if (GSS_ERROR(maj_stat)) {
745 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
746 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
747 return NT_STATUS_ACCESS_DENIED;
750 if (output_token.length < 4) {
751 return NT_STATUS_INVALID_PARAMETER;
754 memcpy(maxlength_accepted, output_token.value, 4);
755 gss_release_buffer(&min_stat, &output_token);
757 /* first byte is the proposed security */
758 security_accepted = maxlength_accepted[0];
759 maxlength_accepted[0] = '\0';
761 /* Rest is the proposed max wrap length */
762 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
763 gensec_gssapi_state->max_wrap_buf_size);
765 gensec_gssapi_state->sasl_protection = 0;
766 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
767 if (security_accepted & NEG_SEAL) {
768 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
770 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
771 if (security_accepted & NEG_SIGN) {
772 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
774 } else if (security_accepted & NEG_NONE) {
775 gensec_gssapi_state->sasl_protection |= NEG_NONE;
777 DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
778 return NT_STATUS_ACCESS_DENIED;
781 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
782 gensec_gssapi_state->sasl_state = STAGE_DONE;
783 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
784 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
785 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
786 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
788 DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
791 *out = data_blob(NULL, 0);
795 return NT_STATUS_INVALID_PARAMETER;
799 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
804 struct gensec_gssapi_state *gensec_gssapi_state
805 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
806 OM_uint32 maj_stat, min_stat;
807 gss_buffer_desc input_token, output_token;
809 input_token.length = in->length;
810 input_token.value = in->data;
812 maj_stat = gss_wrap(&min_stat,
813 gensec_gssapi_state->gssapi_context,
814 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
819 if (GSS_ERROR(maj_stat)) {
820 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
821 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
822 return NT_STATUS_ACCESS_DENIED;
825 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
826 gss_release_buffer(&min_stat, &output_token);
828 if (gensec_gssapi_state->sasl) {
829 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
830 if (max_wrapped_size < out->length) {
831 DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
832 (unsigned)in->length,
833 (unsigned)out->length,
834 (unsigned int)max_wrapped_size));
835 return NT_STATUS_INVALID_PARAMETER;
839 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
841 return NT_STATUS_ACCESS_DENIED;
846 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
851 struct gensec_gssapi_state *gensec_gssapi_state
852 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
853 OM_uint32 maj_stat, min_stat;
854 gss_buffer_desc input_token, output_token;
857 input_token.length = in->length;
858 input_token.value = in->data;
860 if (gensec_gssapi_state->sasl) {
861 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
862 if (max_wrapped_size < in->length) {
863 DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
864 return NT_STATUS_INVALID_PARAMETER;
868 maj_stat = gss_unwrap(&min_stat,
869 gensec_gssapi_state->gssapi_context,
874 if (GSS_ERROR(maj_stat)) {
875 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
876 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
877 return NT_STATUS_ACCESS_DENIED;
880 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
881 gss_release_buffer(&min_stat, &output_token);
883 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
885 return NT_STATUS_ACCESS_DENIED;
890 /* Find out the maximum input size negotiated on this connection */
892 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
894 struct gensec_gssapi_state *gensec_gssapi_state
895 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
896 OM_uint32 maj_stat, min_stat;
897 OM_uint32 max_input_size;
899 maj_stat = gss_wrap_size_limit(&min_stat,
900 gensec_gssapi_state->gssapi_context,
901 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
903 gensec_gssapi_state->max_wrap_buf_size,
905 if (GSS_ERROR(maj_stat)) {
906 TALLOC_CTX *mem_ctx = talloc_new(NULL);
907 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
908 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
909 talloc_free(mem_ctx);
913 return max_input_size;
916 /* Find out the maximum output size negotiated on this connection */
917 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
919 struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
920 return gensec_gssapi_state->max_wrap_buf_size;
923 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
925 uint8_t *data, size_t length,
926 const uint8_t *whole_pdu, size_t pdu_length,
929 struct gensec_gssapi_state *gensec_gssapi_state
930 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
931 OM_uint32 maj_stat, min_stat;
932 gss_buffer_desc input_token, output_token;
936 input_token.length = length;
937 input_token.value = data;
939 maj_stat = gss_wrap(&min_stat,
940 gensec_gssapi_state->gssapi_context,
941 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
946 if (GSS_ERROR(maj_stat)) {
947 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
948 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
949 return NT_STATUS_ACCESS_DENIED;
952 if (output_token.length < input_token.length) {
953 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
954 (long)output_token.length, (long)length));
955 return NT_STATUS_INTERNAL_ERROR;
957 sig_length = output_token.length - input_token.length;
959 memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
960 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
962 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
963 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
964 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
966 gss_release_buffer(&min_stat, &output_token);
968 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
970 return NT_STATUS_ACCESS_DENIED;
975 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
977 uint8_t *data, size_t length,
978 const uint8_t *whole_pdu, size_t pdu_length,
979 const DATA_BLOB *sig)
981 struct gensec_gssapi_state *gensec_gssapi_state
982 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
983 OM_uint32 maj_stat, min_stat;
984 gss_buffer_desc input_token, output_token;
989 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
991 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
993 memcpy(in.data, sig->data, sig->length);
994 memcpy(in.data + sig->length, data, length);
996 input_token.length = in.length;
997 input_token.value = in.data;
999 maj_stat = gss_unwrap(&min_stat,
1000 gensec_gssapi_state->gssapi_context,
1005 if (GSS_ERROR(maj_stat)) {
1006 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1007 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1008 return NT_STATUS_ACCESS_DENIED;
1011 if (output_token.length != length) {
1012 return NT_STATUS_INTERNAL_ERROR;
1015 memcpy(data, output_token.value, length);
1017 gss_release_buffer(&min_stat, &output_token);
1019 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1021 return NT_STATUS_ACCESS_DENIED;
1023 return NT_STATUS_OK;
1026 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1027 TALLOC_CTX *mem_ctx,
1028 const uint8_t *data, size_t length,
1029 const uint8_t *whole_pdu, size_t pdu_length,
1032 struct gensec_gssapi_state *gensec_gssapi_state
1033 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1034 OM_uint32 maj_stat, min_stat;
1035 gss_buffer_desc input_token, output_token;
1037 if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1038 input_token.length = pdu_length;
1039 input_token.value = discard_const_p(uint8_t *, whole_pdu);
1041 input_token.length = length;
1042 input_token.value = discard_const_p(uint8_t *, data);
1045 maj_stat = gss_get_mic(&min_stat,
1046 gensec_gssapi_state->gssapi_context,
1050 if (GSS_ERROR(maj_stat)) {
1051 DEBUG(1, ("GSS GetMic failed: %s\n",
1052 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1053 return NT_STATUS_ACCESS_DENIED;
1056 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1058 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1060 gss_release_buffer(&min_stat, &output_token);
1062 return NT_STATUS_OK;
1065 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1066 TALLOC_CTX *mem_ctx,
1067 const uint8_t *data, size_t length,
1068 const uint8_t *whole_pdu, size_t pdu_length,
1069 const DATA_BLOB *sig)
1071 struct gensec_gssapi_state *gensec_gssapi_state
1072 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1073 OM_uint32 maj_stat, min_stat;
1074 gss_buffer_desc input_token;
1075 gss_buffer_desc input_message;
1076 gss_qop_t qop_state;
1078 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1080 if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1081 input_message.length = pdu_length;
1082 input_message.value = discard_const(whole_pdu);
1084 input_message.length = length;
1085 input_message.value = discard_const(data);
1088 input_token.length = sig->length;
1089 input_token.value = sig->data;
1091 maj_stat = gss_verify_mic(&min_stat,
1092 gensec_gssapi_state->gssapi_context,
1096 if (GSS_ERROR(maj_stat)) {
1097 DEBUG(1, ("GSS VerifyMic failed: %s\n",
1098 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1099 return NT_STATUS_ACCESS_DENIED;
1102 return NT_STATUS_OK;
1105 /* Try to figure out what features we actually got on the connection */
1106 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1109 struct gensec_gssapi_state *gensec_gssapi_state
1110 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1111 if (feature & GENSEC_FEATURE_SIGN) {
1112 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1113 if (gensec_gssapi_state->sasl
1114 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1115 return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1116 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1118 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1120 if (feature & GENSEC_FEATURE_SEAL) {
1121 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1122 if (gensec_gssapi_state->sasl
1123 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1124 return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1125 && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1127 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1129 if (feature & GENSEC_FEATURE_SESSION_KEY) {
1130 /* Only for GSSAPI/Krb5 */
1131 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1135 if (feature & GENSEC_FEATURE_DCE_STYLE) {
1136 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1138 if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1141 if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1145 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "force_new_spnego", false)) {
1148 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "disable_new_spnego", false)) {
1152 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1153 if (!NT_STATUS_IS_OK(status)) {
1157 if (gensec_gssapi_state->lucid->protocol == 1) {
1163 /* We can always do async (rather than strict request/reply) packets. */
1164 if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1171 * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1172 * (for encrypting some passwords).
1174 * This breaks all the abstractions, but what do you expect...
1176 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1177 DATA_BLOB *session_key)
1179 struct gensec_gssapi_state *gensec_gssapi_state
1180 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1181 OM_uint32 maj_stat, min_stat;
1182 krb5_keyblock *subkey;
1184 if (gensec_gssapi_state->session_key.data) {
1185 *session_key = gensec_gssapi_state->session_key;
1186 return NT_STATUS_OK;
1189 maj_stat = gsskrb5_get_subkey(&min_stat,
1190 gensec_gssapi_state->gssapi_context,
1192 if (maj_stat != 0) {
1193 DEBUG(1, ("NO session key for this mech\n"));
1194 return NT_STATUS_NO_USER_SESSION_KEY;
1197 DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1198 (int)KRB5_KEY_LENGTH(subkey),
1199 (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1200 *session_key = data_blob_talloc(gensec_gssapi_state,
1201 KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1202 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1203 if (gensec_gssapi_state->sasl_state == STAGE_DONE) {
1204 /* only cache in the done stage */
1205 gensec_gssapi_state->session_key = *session_key;
1207 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1209 return NT_STATUS_OK;
1212 /* Get some basic (and authorization) information about the user on
1213 * this session. This uses either the PAC (if present) or a local
1214 * database lookup */
1215 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1216 struct auth_session_info **_session_info)
1219 TALLOC_CTX *mem_ctx;
1220 struct gensec_gssapi_state *gensec_gssapi_state
1221 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1222 struct auth_serversupplied_info *server_info = NULL;
1223 struct auth_session_info *session_info = NULL;
1224 OM_uint32 maj_stat, min_stat;
1225 gss_buffer_desc pac;
1228 if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1229 || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1230 gensec_gssapi_state->gss_oid->length) != 0)) {
1231 DEBUG(1, ("NO session info available for this mech\n"));
1232 return NT_STATUS_INVALID_PARAMETER;
1235 mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1236 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1238 maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1239 gensec_gssapi_state->gssapi_context,
1240 KRB5_AUTHDATA_WIN2K_PAC,
1244 if (maj_stat == 0) {
1245 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1246 gss_release_buffer(&min_stat, &pac);
1249 pac_blob = data_blob(NULL, 0);
1252 /* IF we have the PAC - otherwise we need to get this
1253 * data from elsewere - local ldb, or (TODO) lookup of some
1256 if (pac_blob.length) {
1257 nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
1258 lp_iconv_convenience(gensec_security->lp_ctx),
1260 gensec_gssapi_state->smb_krb5_context->krb5_context,
1262 if (!NT_STATUS_IS_OK(nt_status)) {
1263 talloc_free(mem_ctx);
1267 gss_buffer_desc name_token;
1268 char *principal_string;
1270 maj_stat = gss_display_name (&min_stat,
1271 gensec_gssapi_state->client_name,
1274 if (GSS_ERROR(maj_stat)) {
1275 DEBUG(1, ("GSS display_name failed: %s\n",
1276 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1277 talloc_free(mem_ctx);
1278 return NT_STATUS_FOOBAR;
1281 principal_string = talloc_strndup(mem_ctx,
1282 (const char *)name_token.value,
1285 gss_release_buffer(&min_stat, &name_token);
1287 if (!principal_string) {
1288 talloc_free(mem_ctx);
1289 return NT_STATUS_NO_MEMORY;
1292 if (!lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
1293 DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1294 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1295 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->event_ctx,
1296 gensec_security->lp_ctx, principal_string,
1299 if (!NT_STATUS_IS_OK(nt_status)) {
1300 talloc_free(mem_ctx);
1304 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1306 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1307 return NT_STATUS_ACCESS_DENIED;
1311 /* references the server_info into the session_info */
1312 nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx,
1313 gensec_security->lp_ctx, server_info, &session_info);
1314 if (!NT_STATUS_IS_OK(nt_status)) {
1315 talloc_free(mem_ctx);
1319 nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1320 if (!NT_STATUS_IS_OK(nt_status)) {
1321 talloc_free(mem_ctx);
1325 if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1326 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1328 krb5_error_code ret;
1329 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1330 session_info->credentials = cli_credentials_init(session_info);
1331 if (!session_info->credentials) {
1332 talloc_free(mem_ctx);
1333 return NT_STATUS_NO_MEMORY;
1336 cli_credentials_set_conf(session_info->credentials, gensec_security->lp_ctx);
1337 /* Just so we don't segfault trying to get at a username */
1338 cli_credentials_set_anonymous(session_info->credentials);
1340 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1341 gensec_security->event_ctx,
1342 gensec_security->lp_ctx,
1343 gensec_gssapi_state->delegated_cred_handle,
1346 talloc_free(mem_ctx);
1347 return NT_STATUS_NO_MEMORY;
1350 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1351 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1353 /* It has been taken from this place... */
1354 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1356 talloc_steal(gensec_gssapi_state, session_info);
1357 talloc_free(mem_ctx);
1358 *_session_info = session_info;
1360 return NT_STATUS_OK;
1363 size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1365 struct gensec_gssapi_state *gensec_gssapi_state
1366 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1369 if (gensec_gssapi_state->sig_size) {
1370 return gensec_gssapi_state->sig_size;
1373 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1374 gensec_gssapi_state->sig_size = 45;
1376 gensec_gssapi_state->sig_size = 37;
1379 status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1380 if (!NT_STATUS_IS_OK(status)) {
1381 return gensec_gssapi_state->sig_size;
1384 if (gensec_gssapi_state->lucid->protocol == 1) {
1385 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1387 * TODO: windows uses 76 here, but we don't know
1388 * gss_wrap works with aes keys yet
1390 gensec_gssapi_state->sig_size = 76;
1392 gensec_gssapi_state->sig_size = 28;
1394 } else if (gensec_gssapi_state->lucid->protocol == 0) {
1395 switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1397 case KEYTYPE_ARCFOUR:
1398 case KEYTYPE_ARCFOUR_56:
1399 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1400 gensec_gssapi_state->sig_size = 45;
1402 gensec_gssapi_state->sig_size = 37;
1406 if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1407 gensec_gssapi_state->sig_size = 57;
1409 gensec_gssapi_state->sig_size = 49;
1415 return gensec_gssapi_state->sig_size;
1418 static const char *gensec_gssapi_krb5_oids[] = {
1419 GENSEC_OID_KERBEROS5_OLD,
1420 GENSEC_OID_KERBEROS5,
1424 static const char *gensec_gssapi_spnego_oids[] = {
1429 /* As a server, this could in theory accept any GSSAPI mech */
1430 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1431 .name = "gssapi_spnego",
1432 .sasl_name = "GSS-SPNEGO",
1433 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1434 .oid = gensec_gssapi_spnego_oids,
1435 .client_start = gensec_gssapi_client_start,
1436 .server_start = gensec_gssapi_server_start,
1437 .magic = gensec_gssapi_magic,
1438 .update = gensec_gssapi_update,
1439 .session_key = gensec_gssapi_session_key,
1440 .session_info = gensec_gssapi_session_info,
1441 .sign_packet = gensec_gssapi_sign_packet,
1442 .check_packet = gensec_gssapi_check_packet,
1443 .seal_packet = gensec_gssapi_seal_packet,
1444 .unseal_packet = gensec_gssapi_unseal_packet,
1445 .wrap = gensec_gssapi_wrap,
1446 .unwrap = gensec_gssapi_unwrap,
1447 .have_feature = gensec_gssapi_have_feature,
1450 .priority = GENSEC_GSSAPI
1453 /* As a server, this could in theory accept any GSSAPI mech */
1454 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1455 .name = "gssapi_krb5",
1456 .auth_type = DCERPC_AUTH_TYPE_KRB5,
1457 .oid = gensec_gssapi_krb5_oids,
1458 .client_start = gensec_gssapi_client_start,
1459 .server_start = gensec_gssapi_server_start,
1460 .magic = gensec_gssapi_magic,
1461 .update = gensec_gssapi_update,
1462 .session_key = gensec_gssapi_session_key,
1463 .session_info = gensec_gssapi_session_info,
1464 .sig_size = gensec_gssapi_sig_size,
1465 .sign_packet = gensec_gssapi_sign_packet,
1466 .check_packet = gensec_gssapi_check_packet,
1467 .seal_packet = gensec_gssapi_seal_packet,
1468 .unseal_packet = gensec_gssapi_unseal_packet,
1469 .wrap = gensec_gssapi_wrap,
1470 .unwrap = gensec_gssapi_unwrap,
1471 .have_feature = gensec_gssapi_have_feature,
1474 .priority = GENSEC_GSSAPI
1477 /* As a server, this could in theory accept any GSSAPI mech */
1478 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1479 .name = "gssapi_krb5_sasl",
1480 .sasl_name = "GSSAPI",
1481 .client_start = gensec_gssapi_sasl_client_start,
1482 .server_start = gensec_gssapi_sasl_server_start,
1483 .update = gensec_gssapi_update,
1484 .session_key = gensec_gssapi_session_key,
1485 .session_info = gensec_gssapi_session_info,
1486 .max_input_size = gensec_gssapi_max_input_size,
1487 .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1488 .wrap = gensec_gssapi_wrap,
1489 .unwrap = gensec_gssapi_unwrap,
1490 .have_feature = gensec_gssapi_have_feature,
1493 .priority = GENSEC_GSSAPI
1496 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1500 ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1501 if (!NT_STATUS_IS_OK(ret)) {
1502 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1503 gensec_gssapi_spnego_security_ops.name));
1507 ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1508 if (!NT_STATUS_IS_OK(ret)) {
1509 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1510 gensec_gssapi_krb5_security_ops.name));
1514 ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1515 if (!NT_STATUS_IS_OK(ret)) {
1516 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1517 gensec_gssapi_sasl_krb5_security_ops.name));