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 "auth/gensec/gensec_proto.h"
38 #include "param/param.h"
39 #include "auth/session_proto.h"
41 enum gensec_gssapi_sasl_state
45 STAGE_SASL_SSF_ACCEPT,
53 struct gensec_gssapi_state {
54 gss_ctx_id_t gssapi_context;
55 struct gss_channel_bindings_struct *input_chan_bindings;
56 gss_name_t server_name;
57 gss_name_t client_name;
58 OM_uint32 want_flags, got_flags;
61 DATA_BLOB session_key;
64 struct smb_krb5_context *smb_krb5_context;
65 struct gssapi_creds_container *client_cred;
66 struct gssapi_creds_container *server_cred;
68 gss_cred_id_t delegated_cred_handle;
70 bool sasl; /* We have two different mechs in this file: One
71 * for SASL wrapped GSSAPI and another for normal
73 enum gensec_gssapi_sasl_state sasl_state;
74 uint8_t sasl_protection; /* What was negotiated at the SASL
75 * layer, independent of the GSSAPI
78 size_t max_wrap_buf_size;
79 int gss_exchange_count;
82 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
83 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
85 static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
86 OM_uint32 maj_stat, OM_uint32 min_stat,
89 OM_uint32 disp_min_stat, disp_maj_stat;
90 gss_buffer_desc maj_error_message;
91 gss_buffer_desc min_error_message;
92 char *maj_error_string, *min_error_string;
93 OM_uint32 msg_ctx = 0;
97 maj_error_message.value = NULL;
98 min_error_message.value = NULL;
99 maj_error_message.length = 0;
100 min_error_message.length = 0;
102 disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
103 mech, &msg_ctx, &maj_error_message);
104 disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
105 mech, &msg_ctx, &min_error_message);
107 maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
109 min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
111 ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
113 talloc_free(maj_error_string);
114 talloc_free(min_error_string);
116 gss_release_buffer(&disp_min_stat, &maj_error_message);
117 gss_release_buffer(&disp_min_stat, &min_error_message);
123 static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
125 OM_uint32 maj_stat, min_stat;
127 if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
128 maj_stat = gss_release_cred(&min_stat,
129 &gensec_gssapi_state->delegated_cred_handle);
132 if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
133 maj_stat = gss_delete_sec_context (&min_stat,
134 &gensec_gssapi_state->gssapi_context,
138 if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
139 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
141 if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
142 maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
147 static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
149 struct gensec_gssapi_state *gensec_gssapi_state;
151 struct gsskrb5_send_to_kdc send_to_kdc;
153 gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
154 if (!gensec_gssapi_state) {
155 return NT_STATUS_NO_MEMORY;
158 gensec_gssapi_state->gss_exchange_count = 0;
159 gensec_gssapi_state->max_wrap_buf_size
160 = lp_parm_int(gensec_security->lp_ctx, NULL, "gensec_gssapi", "max wrap buf size", 65536);
162 gensec_gssapi_state->sasl = false;
163 gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
165 gensec_security->private_data = gensec_gssapi_state;
167 gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
168 gensec_gssapi_state->server_name = GSS_C_NO_NAME;
169 gensec_gssapi_state->client_name = GSS_C_NO_NAME;
171 /* TODO: Fill in channel bindings */
172 gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
174 gensec_gssapi_state->want_flags = 0;
175 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "mutual", true)) {
176 gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
178 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "delegation", true)) {
179 gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
181 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "replay", true)) {
182 gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
184 if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "sequence", true)) {
185 gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
188 gensec_gssapi_state->got_flags = 0;
190 gensec_gssapi_state->session_key = data_blob(NULL, 0);
191 gensec_gssapi_state->pac = data_blob(NULL, 0);
193 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
195 talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
197 if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
198 gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
200 if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
201 gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
203 if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
204 gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
207 gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
209 send_to_kdc.func = smb_krb5_send_and_recv_func;
210 send_to_kdc.ptr = gensec_security->event_ctx;
212 ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
214 DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
215 talloc_free(gensec_gssapi_state);
216 return NT_STATUS_INTERNAL_ERROR;
218 if (lp_realm(gensec_security->lp_ctx) && *lp_realm(gensec_security->lp_ctx)) {
219 char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->lp_ctx));
221 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->lp_ctx)));
222 talloc_free(gensec_gssapi_state);
223 return NT_STATUS_NO_MEMORY;
225 ret = gsskrb5_set_default_realm(upper_realm);
226 talloc_free(upper_realm);
228 DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
229 talloc_free(gensec_gssapi_state);
230 return NT_STATUS_INTERNAL_ERROR;
234 /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
235 ret = gsskrb5_set_dns_canonicalize(lp_parm_bool(gensec_security->lp_ctx, NULL, "krb5", "set_dns_canonicalize", false));
237 DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
238 talloc_free(gensec_gssapi_state);
239 return NT_STATUS_INTERNAL_ERROR;
242 ret = smb_krb5_init_context(gensec_gssapi_state,
243 gensec_security->event_ctx,
244 gensec_security->lp_ctx,
245 &gensec_gssapi_state->smb_krb5_context);
247 DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
248 error_message(ret)));
249 talloc_free(gensec_gssapi_state);
250 return NT_STATUS_INTERNAL_ERROR;
255 static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
259 struct gensec_gssapi_state *gensec_gssapi_state;
260 struct cli_credentials *machine_account;
261 struct gssapi_creds_container *gcc;
263 nt_status = gensec_gssapi_start(gensec_security);
264 if (!NT_STATUS_IS_OK(nt_status)) {
268 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
270 machine_account = gensec_get_credentials(gensec_security);
272 if (!machine_account) {
273 DEBUG(3, ("No machine account credentials specified\n"));
274 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
276 ret = cli_credentials_get_server_gss_creds(machine_account, gensec_security->lp_ctx, &gcc);
278 DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
279 error_message(ret)));
280 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
284 gensec_gssapi_state->server_cred = gcc;
289 static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
292 struct gensec_gssapi_state *gensec_gssapi_state;
293 nt_status = gensec_gssapi_server_start(gensec_security);
295 if (NT_STATUS_IS_OK(nt_status)) {
296 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
297 gensec_gssapi_state->sasl = true;
302 static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
304 struct gensec_gssapi_state *gensec_gssapi_state;
305 struct cli_credentials *creds = gensec_get_credentials(gensec_security);
308 gss_buffer_desc name_token;
310 OM_uint32 maj_stat, min_stat;
311 const char *hostname = gensec_get_target_hostname(gensec_security);
312 const char *principal;
313 struct gssapi_creds_container *gcc;
316 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
317 return NT_STATUS_INVALID_PARAMETER;
319 if (is_ipaddress(hostname)) {
320 DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
321 return NT_STATUS_INVALID_PARAMETER;
323 if (strcmp(hostname, "localhost") == 0) {
324 DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
325 return NT_STATUS_INVALID_PARAMETER;
328 nt_status = gensec_gssapi_start(gensec_security);
329 if (!NT_STATUS_IS_OK(nt_status)) {
333 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
335 gensec_gssapi_state->gss_oid = gss_mech_krb5;
337 principal = gensec_get_target_principal(gensec_security);
338 if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
339 name_type = GSS_C_NULL_OID;
341 principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
342 gensec_get_target_service(gensec_security),
345 name_type = GSS_C_NT_HOSTBASED_SERVICE;
347 name_token.value = discard_const_p(uint8_t, principal);
348 name_token.length = strlen(principal);
351 maj_stat = gss_import_name (&min_stat,
354 &gensec_gssapi_state->server_name);
356 DEBUG(2, ("GSS Import name of %s failed: %s\n",
357 (char *)name_token.value,
358 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
359 return NT_STATUS_INVALID_PARAMETER;
362 ret = cli_credentials_get_client_gss_creds(creds, gensec_security->lp_ctx, &gcc);
366 case KRB5KDC_ERR_PREAUTH_FAILED:
367 return NT_STATUS_LOGON_FAILURE;
368 case KRB5_KDC_UNREACH:
369 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
370 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
372 DEBUG(1, ("Aquiring initiator credentials failed\n"));
373 return NT_STATUS_UNSUCCESSFUL;
376 gensec_gssapi_state->client_cred = gcc;
377 if (!talloc_reference(gensec_gssapi_state, gcc)) {
378 return NT_STATUS_NO_MEMORY;
384 static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
387 struct gensec_gssapi_state *gensec_gssapi_state;
388 nt_status = gensec_gssapi_client_start(gensec_security);
390 if (NT_STATUS_IS_OK(nt_status)) {
391 gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
392 gensec_gssapi_state->sasl = true;
399 * Check if the packet is one for this mechansim
401 * @param gensec_security GENSEC state
402 * @param in The request, as a DATA_BLOB
403 * @return Error, INVALID_PARAMETER if it's not a packet for us
404 * or NT_STATUS_OK if the packet is ok.
407 static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
410 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
413 return NT_STATUS_INVALID_PARAMETER;
419 * Next state function for the GSSAPI GENSEC mechanism
421 * @param gensec_gssapi_state GSSAPI State
422 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
423 * @param in The request, as a DATA_BLOB
424 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
425 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
426 * or NT_STATUS_OK if the user is authenticated.
429 static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
430 TALLOC_CTX *out_mem_ctx,
431 const DATA_BLOB in, DATA_BLOB *out)
433 struct gensec_gssapi_state *gensec_gssapi_state
434 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
435 NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
436 OM_uint32 maj_stat, min_stat;
438 gss_buffer_desc input_token, output_token;
439 gss_OID gss_oid_p = NULL;
440 input_token.length = in.length;
441 input_token.value = in.data;
443 switch (gensec_gssapi_state->sasl_state) {
446 switch (gensec_security->gensec_role) {
449 maj_stat = gss_init_sec_context(&min_stat,
450 gensec_gssapi_state->client_cred->creds,
451 &gensec_gssapi_state->gssapi_context,
452 gensec_gssapi_state->server_name,
453 gensec_gssapi_state->gss_oid,
454 gensec_gssapi_state->want_flags,
456 gensec_gssapi_state->input_chan_bindings,
460 &gensec_gssapi_state->got_flags, /* ret flags */
463 gensec_gssapi_state->gss_oid = gss_oid_p;
469 maj_stat = gss_accept_sec_context(&min_stat,
470 &gensec_gssapi_state->gssapi_context,
471 gensec_gssapi_state->server_cred->creds,
473 gensec_gssapi_state->input_chan_bindings,
474 &gensec_gssapi_state->client_name,
477 &gensec_gssapi_state->got_flags,
479 &gensec_gssapi_state->delegated_cred_handle);
481 gensec_gssapi_state->gss_oid = gss_oid_p;
486 return NT_STATUS_INVALID_PARAMETER;
490 gensec_gssapi_state->gss_exchange_count++;
492 if (maj_stat == GSS_S_COMPLETE) {
493 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
494 gss_release_buffer(&min_stat2, &output_token);
496 if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
497 DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
499 DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
502 /* We may have been invoked as SASL, so there
503 * is more work to do */
504 if (gensec_gssapi_state->sasl) {
505 /* Due to a very subtle interaction
506 * with SASL and the LDAP libs, we
507 * must ensure the data pointer is
508 * != NULL, but the length is 0.
510 * This ensures we send a 'zero
511 * length' (rather than NULL) response
515 out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
518 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
519 return NT_STATUS_MORE_PROCESSING_REQUIRED;
521 gensec_gssapi_state->sasl_state = STAGE_DONE;
523 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
524 DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
525 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
526 DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
528 DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
533 } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
534 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
535 gss_release_buffer(&min_stat2, &output_token);
537 return NT_STATUS_MORE_PROCESSING_REQUIRED;
538 } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
540 case KRB5_KDC_UNREACH:
541 DEBUG(3, ("Cannot reach a KDC we require: %s\n",
542 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
543 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
544 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
545 DEBUG(3, ("Server is not registered with our KDC: %s\n",
546 gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
547 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
548 case KRB5KRB_AP_ERR_MSG_TYPE:
549 /* garbage input, possibly from the auto-mech detection */
550 return NT_STATUS_INVALID_PARAMETER;
552 DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
553 gensec_gssapi_state->gss_exchange_count,
554 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
558 DEBUG(1, ("GSS Update(%d) failed: %s\n",
559 gensec_gssapi_state->gss_exchange_count,
560 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
566 /* These last two stages are only done if we were invoked as SASL */
567 case STAGE_SASL_SSF_NEG:
569 switch (gensec_security->gensec_role) {
572 uint8_t maxlength_proposed[4];
573 uint8_t maxlength_accepted[4];
574 uint8_t security_supported;
577 input_token.length = in.length;
578 input_token.value = in.data;
580 /* As a client, we have just send a
581 * zero-length blob to the server (after the
582 * normal GSSAPI exchange), and it has replied
583 * with it's SASL negotiation */
585 maj_stat = gss_unwrap(&min_stat,
586 gensec_gssapi_state->gssapi_context,
591 if (GSS_ERROR(maj_stat)) {
592 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
593 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
594 return NT_STATUS_ACCESS_DENIED;
597 if (output_token.length < 4) {
598 return NT_STATUS_INVALID_PARAMETER;
601 memcpy(maxlength_proposed, output_token.value, 4);
602 gss_release_buffer(&min_stat, &output_token);
604 /* first byte is the proposed security */
605 security_supported = maxlength_proposed[0];
606 maxlength_proposed[0] = '\0';
608 /* Rest is the proposed max wrap length */
609 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
610 gensec_gssapi_state->max_wrap_buf_size);
611 gensec_gssapi_state->sasl_protection = 0;
612 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
613 if (security_supported & NEG_SEAL) {
614 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
616 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
617 if (security_supported & NEG_SIGN) {
618 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
620 } else if (security_supported & NEG_NONE) {
621 gensec_gssapi_state->sasl_protection |= NEG_NONE;
623 DEBUG(1, ("Remote server does not support unprotected connections"));
624 return NT_STATUS_ACCESS_DENIED;
627 /* Send back the negotiated max length */
629 RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
631 maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
633 input_token.value = maxlength_accepted;
634 input_token.length = sizeof(maxlength_accepted);
636 maj_stat = gss_wrap(&min_stat,
637 gensec_gssapi_state->gssapi_context,
643 if (GSS_ERROR(maj_stat)) {
644 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
645 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
646 return NT_STATUS_ACCESS_DENIED;
649 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
650 gss_release_buffer(&min_stat, &output_token);
652 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
653 gensec_gssapi_state->sasl_state = STAGE_DONE;
655 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
656 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
657 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
658 DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
660 DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
667 uint8_t maxlength_proposed[4];
668 uint8_t security_supported = 0x0;
671 /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
672 if (in.length != 0) {
673 DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
676 /* Give the client some idea what we will support */
678 RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
679 /* first byte is the proposed security */
680 maxlength_proposed[0] = '\0';
682 gensec_gssapi_state->sasl_protection = 0;
683 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
684 security_supported |= NEG_SEAL;
686 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
687 security_supported |= NEG_SIGN;
689 if (security_supported == 0) {
690 /* If we don't support anything, this must be 0 */
691 RSIVAL(maxlength_proposed, 0, 0x0);
694 /* TODO: We may not wish to support this */
695 security_supported |= NEG_NONE;
696 maxlength_proposed[0] = security_supported;
698 input_token.value = maxlength_proposed;
699 input_token.length = sizeof(maxlength_proposed);
701 maj_stat = gss_wrap(&min_stat,
702 gensec_gssapi_state->gssapi_context,
708 if (GSS_ERROR(maj_stat)) {
709 DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
710 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
711 return NT_STATUS_ACCESS_DENIED;
714 *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
715 gss_release_buffer(&min_stat, &output_token);
717 gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
718 return NT_STATUS_MORE_PROCESSING_REQUIRED;
721 return NT_STATUS_INVALID_PARAMETER;
725 /* This is s server-only stage */
726 case STAGE_SASL_SSF_ACCEPT:
728 uint8_t maxlength_accepted[4];
729 uint8_t security_accepted;
732 input_token.length = in.length;
733 input_token.value = in.data;
735 maj_stat = gss_unwrap(&min_stat,
736 gensec_gssapi_state->gssapi_context,
741 if (GSS_ERROR(maj_stat)) {
742 DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
743 gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
744 return NT_STATUS_ACCESS_DENIED;
747 if (output_token.length < 4) {
748 return NT_STATUS_INVALID_PARAMETER;
751 memcpy(maxlength_accepted, output_token.value, 4);
752 gss_release_buffer(&min_stat, &output_token);
754 /* first byte is the proposed security */
755 security_accepted = maxlength_accepted[0];
756 maxlength_accepted[0] = '\0';
758 /* Rest is the proposed max wrap length */
759 gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
760 gensec_gssapi_state->max_wrap_buf_size);
762 gensec_gssapi_state->sasl_protection = 0;
763 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
764 if (security_accepted & NEG_SEAL) {
765 gensec_gssapi_state->sasl_protection |= NEG_SEAL;
767 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
768 if (security_accepted & NEG_SIGN) {
769 gensec_gssapi_state->sasl_protection |= NEG_SIGN;
771 } else if (security_accepted & NEG_NONE) {
772 gensec_gssapi_state->sasl_protection |= NEG_NONE;
774 DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
775 return NT_STATUS_ACCESS_DENIED;
778 /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
779 gensec_gssapi_state->sasl_state = STAGE_DONE;
780 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
781 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
782 } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
783 DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
785 DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
788 *out = data_blob(NULL, 0);
792 return NT_STATUS_INVALID_PARAMETER;
796 static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
801 struct gensec_gssapi_state *gensec_gssapi_state
802 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
803 OM_uint32 maj_stat, min_stat;
804 gss_buffer_desc input_token, output_token;
806 input_token.length = in->length;
807 input_token.value = in->data;
809 maj_stat = gss_wrap(&min_stat,
810 gensec_gssapi_state->gssapi_context,
811 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
816 if (GSS_ERROR(maj_stat)) {
817 DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
818 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
819 return NT_STATUS_ACCESS_DENIED;
822 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
823 gss_release_buffer(&min_stat, &output_token);
825 if (gensec_gssapi_state->sasl) {
826 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
827 if (max_wrapped_size < out->length) {
828 DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
829 (unsigned)in->length,
830 (unsigned)out->length,
831 (unsigned int)max_wrapped_size));
832 return NT_STATUS_INVALID_PARAMETER;
836 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
838 return NT_STATUS_ACCESS_DENIED;
843 static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
848 struct gensec_gssapi_state *gensec_gssapi_state
849 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
850 OM_uint32 maj_stat, min_stat;
851 gss_buffer_desc input_token, output_token;
854 input_token.length = in->length;
855 input_token.value = in->data;
857 if (gensec_gssapi_state->sasl) {
858 size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
859 if (max_wrapped_size < in->length) {
860 DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
861 return NT_STATUS_INVALID_PARAMETER;
865 maj_stat = gss_unwrap(&min_stat,
866 gensec_gssapi_state->gssapi_context,
871 if (GSS_ERROR(maj_stat)) {
872 DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
873 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
874 return NT_STATUS_ACCESS_DENIED;
877 *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
878 gss_release_buffer(&min_stat, &output_token);
880 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
882 return NT_STATUS_ACCESS_DENIED;
887 /* Find out the maximum input size negotiated on this connection */
889 static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
891 struct gensec_gssapi_state *gensec_gssapi_state
892 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
893 OM_uint32 maj_stat, min_stat;
894 OM_uint32 max_input_size;
896 maj_stat = gss_wrap_size_limit(&min_stat,
897 gensec_gssapi_state->gssapi_context,
898 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
900 gensec_gssapi_state->max_wrap_buf_size,
902 if (GSS_ERROR(maj_stat)) {
903 TALLOC_CTX *mem_ctx = talloc_new(NULL);
904 DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
905 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
906 talloc_free(mem_ctx);
910 return max_input_size;
913 /* Find out the maximum output size negotiated on this connection */
914 static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
916 struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
917 return gensec_gssapi_state->max_wrap_buf_size;
920 static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
922 uint8_t *data, size_t length,
923 const uint8_t *whole_pdu, size_t pdu_length,
926 struct gensec_gssapi_state *gensec_gssapi_state
927 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
928 OM_uint32 maj_stat, min_stat;
929 gss_buffer_desc input_token, output_token;
933 input_token.length = length;
934 input_token.value = data;
936 maj_stat = gss_wrap(&min_stat,
937 gensec_gssapi_state->gssapi_context,
938 gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
943 if (GSS_ERROR(maj_stat)) {
944 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
945 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
946 return NT_STATUS_ACCESS_DENIED;
949 if (output_token.length < input_token.length) {
950 DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
951 (long)output_token.length, (long)length));
952 return NT_STATUS_INTERNAL_ERROR;
954 sig_length = output_token.length - input_token.length;
956 memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
957 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
959 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
960 dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
961 dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
963 gss_release_buffer(&min_stat, &output_token);
965 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
967 return NT_STATUS_ACCESS_DENIED;
972 static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
974 uint8_t *data, size_t length,
975 const uint8_t *whole_pdu, size_t pdu_length,
976 const DATA_BLOB *sig)
978 struct gensec_gssapi_state *gensec_gssapi_state
979 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
980 OM_uint32 maj_stat, min_stat;
981 gss_buffer_desc input_token, output_token;
986 dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
988 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
990 memcpy(in.data, sig->data, sig->length);
991 memcpy(in.data + sig->length, data, length);
993 input_token.length = in.length;
994 input_token.value = in.data;
996 maj_stat = gss_unwrap(&min_stat,
997 gensec_gssapi_state->gssapi_context,
1002 if (GSS_ERROR(maj_stat)) {
1003 DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1004 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1005 return NT_STATUS_ACCESS_DENIED;
1008 if (output_token.length != length) {
1009 return NT_STATUS_INTERNAL_ERROR;
1012 memcpy(data, output_token.value, length);
1014 gss_release_buffer(&min_stat, &output_token);
1016 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1018 return NT_STATUS_ACCESS_DENIED;
1020 return NT_STATUS_OK;
1023 static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1024 TALLOC_CTX *mem_ctx,
1025 const uint8_t *data, size_t length,
1026 const uint8_t *whole_pdu, size_t pdu_length,
1029 struct gensec_gssapi_state *gensec_gssapi_state
1030 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1031 OM_uint32 maj_stat, min_stat;
1032 gss_buffer_desc input_token, output_token;
1034 ssize_t sig_length = 0;
1036 input_token.length = length;
1037 input_token.value = discard_const_p(uint8_t *, data);
1039 maj_stat = gss_wrap(&min_stat,
1040 gensec_gssapi_state->gssapi_context,
1046 if (GSS_ERROR(maj_stat)) {
1047 DEBUG(1, ("GSS Wrap failed: %s\n",
1048 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1049 return NT_STATUS_ACCESS_DENIED;
1052 if (output_token.length < input_token.length) {
1053 DEBUG(1, ("gensec_gssapi_sign_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
1054 (long)output_token.length, (long)length));
1055 return NT_STATUS_INTERNAL_ERROR;
1058 /* Caller must pad to right boundary */
1059 sig_length = output_token.length - input_token.length;
1061 *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
1063 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1065 gss_release_buffer(&min_stat, &output_token);
1067 return NT_STATUS_OK;
1070 static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1071 TALLOC_CTX *mem_ctx,
1072 const uint8_t *data, size_t length,
1073 const uint8_t *whole_pdu, size_t pdu_length,
1074 const DATA_BLOB *sig)
1076 struct gensec_gssapi_state *gensec_gssapi_state
1077 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1078 OM_uint32 maj_stat, min_stat;
1079 gss_buffer_desc input_token, output_token;
1081 gss_qop_t qop_state;
1084 dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1086 in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
1088 memcpy(in.data, sig->data, sig->length);
1089 memcpy(in.data + sig->length, data, length);
1091 input_token.length = in.length;
1092 input_token.value = in.data;
1094 maj_stat = gss_unwrap(&min_stat,
1095 gensec_gssapi_state->gssapi_context,
1100 if (GSS_ERROR(maj_stat)) {
1101 DEBUG(1, ("GSS UnWrap failed: %s\n",
1102 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1103 return NT_STATUS_ACCESS_DENIED;
1106 if (output_token.length != length) {
1107 return NT_STATUS_INTERNAL_ERROR;
1110 gss_release_buffer(&min_stat, &output_token);
1112 return NT_STATUS_OK;
1115 /* Try to figure out what features we actually got on the connection */
1116 static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1119 struct gensec_gssapi_state *gensec_gssapi_state
1120 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1121 if (feature & GENSEC_FEATURE_SIGN) {
1122 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1123 if (gensec_gssapi_state->sasl
1124 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1125 return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1126 && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1128 return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1130 if (feature & GENSEC_FEATURE_SEAL) {
1131 /* If we are going GSSAPI SASL, then we honour the second negotiation */
1132 if (gensec_gssapi_state->sasl
1133 && gensec_gssapi_state->sasl_state == STAGE_DONE) {
1134 return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1135 && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1137 return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1139 if (feature & GENSEC_FEATURE_SESSION_KEY) {
1140 /* Only for GSSAPI/Krb5 */
1141 if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1145 if (feature & GENSEC_FEATURE_DCE_STYLE) {
1146 return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1148 /* We can always do async (rather than strict request/reply) packets. */
1149 if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1156 * Extract the 'sesssion key' needed by SMB signing and ncacn_np
1157 * (for encrypting some passwords).
1159 * This breaks all the abstractions, but what do you expect...
1161 static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1162 DATA_BLOB *session_key)
1164 struct gensec_gssapi_state *gensec_gssapi_state
1165 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1166 OM_uint32 maj_stat, min_stat;
1167 krb5_keyblock *subkey;
1169 if (gensec_gssapi_state->session_key.data) {
1170 *session_key = gensec_gssapi_state->session_key;
1171 return NT_STATUS_OK;
1174 maj_stat = gsskrb5_get_initiator_subkey(&min_stat,
1175 gensec_gssapi_state->gssapi_context,
1177 if (maj_stat != 0) {
1178 DEBUG(1, ("NO session key for this mech\n"));
1179 return NT_STATUS_NO_USER_SESSION_KEY;
1182 DEBUG(10, ("Got KRB5 session key of length %d\n",
1183 (int)KRB5_KEY_LENGTH(subkey)));
1184 gensec_gssapi_state->session_key = data_blob_talloc(gensec_gssapi_state,
1185 KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1186 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1187 *session_key = gensec_gssapi_state->session_key;
1188 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1190 return NT_STATUS_OK;
1193 /* Get some basic (and authorization) information about the user on
1194 * this session. This uses either the PAC (if present) or a local
1195 * database lookup */
1196 static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1197 struct auth_session_info **_session_info)
1200 TALLOC_CTX *mem_ctx;
1201 struct gensec_gssapi_state *gensec_gssapi_state
1202 = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1203 struct auth_serversupplied_info *server_info = NULL;
1204 struct auth_session_info *session_info = NULL;
1205 struct PAC_LOGON_INFO *logon_info;
1206 OM_uint32 maj_stat, min_stat;
1207 gss_buffer_desc name_token;
1208 gss_buffer_desc pac;
1209 krb5_keyblock *keyblock;
1211 krb5_principal principal;
1212 char *principal_string;
1215 if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1216 || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1217 gensec_gssapi_state->gss_oid->length) != 0)) {
1218 DEBUG(1, ("NO session info available for this mech\n"));
1219 return NT_STATUS_INVALID_PARAMETER;
1222 mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1223 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1225 maj_stat = gss_display_name (&min_stat,
1226 gensec_gssapi_state->client_name,
1229 if (GSS_ERROR(maj_stat)) {
1230 DEBUG(1, ("GSS display_name failed: %s\n",
1231 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1232 talloc_free(mem_ctx);
1233 return NT_STATUS_FOOBAR;
1236 principal_string = talloc_strndup(mem_ctx,
1237 (const char *)name_token.value,
1240 gss_release_buffer(&min_stat, &name_token);
1242 if (!principal_string) {
1243 talloc_free(mem_ctx);
1244 return NT_STATUS_NO_MEMORY;
1247 maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1248 gensec_gssapi_state->gssapi_context,
1249 KRB5_AUTHDATA_WIN2K_PAC,
1253 if (maj_stat == 0) {
1254 pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1255 gss_release_buffer(&min_stat, &pac);
1258 pac_blob = data_blob(NULL, 0);
1261 /* IF we have the PAC - otherwise we need to get this
1262 * data from elsewere - local ldb, or (TODO) lookup of some
1265 if (pac_blob.length) {
1266 krb5_error_code ret;
1267 union netr_Validation validation;
1269 maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
1270 gensec_gssapi_state->gssapi_context,
1273 if (GSS_ERROR(maj_stat)) {
1274 DEBUG(1, ("gsskrb5_extract_authtime_from_sec_context: %s\n",
1275 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1276 talloc_free(mem_ctx);
1277 return NT_STATUS_FOOBAR;
1280 maj_stat = gsskrb5_extract_service_keyblock(&min_stat,
1281 gensec_gssapi_state->gssapi_context,
1284 if (GSS_ERROR(maj_stat)) {
1285 DEBUG(1, ("gsskrb5_copy_service_keyblock failed: %s\n",
1286 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1287 talloc_free(mem_ctx);
1288 return NT_STATUS_FOOBAR;
1291 ret = krb5_parse_name_flags(gensec_gssapi_state->smb_krb5_context->krb5_context,
1293 KRB5_PRINCIPAL_PARSE_MUST_REALM,
1296 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1298 talloc_free(mem_ctx);
1299 return NT_STATUS_INVALID_PARAMETER;
1302 /* decode and verify the pac */
1303 nt_status = kerberos_pac_logon_info(mem_ctx, lp_iconv_convenience(gensec_security->lp_ctx), &logon_info, pac_blob,
1304 gensec_gssapi_state->smb_krb5_context->krb5_context,
1305 NULL, keyblock, principal, authtime, NULL);
1306 krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
1307 krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context,
1310 if (!NT_STATUS_IS_OK(nt_status)) {
1311 talloc_free(mem_ctx);
1314 validation.sam3 = &logon_info->info3;
1315 nt_status = make_server_info_netlogon_validation(gensec_gssapi_state,
1319 if (!NT_STATUS_IS_OK(nt_status)) {
1320 talloc_free(mem_ctx);
1323 } else if (!lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
1324 DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1325 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1326 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->lp_ctx, principal_string,
1329 if (!NT_STATUS_IS_OK(nt_status)) {
1330 talloc_free(mem_ctx);
1334 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1336 gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1337 return NT_STATUS_ACCESS_DENIED;
1340 /* references the server_info into the session_info */
1341 nt_status = auth_generate_session_info(mem_ctx, gensec_security->lp_ctx, server_info, &session_info);
1342 if (!NT_STATUS_IS_OK(nt_status)) {
1343 talloc_free(mem_ctx);
1347 nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1348 if (!NT_STATUS_IS_OK(nt_status)) {
1349 talloc_free(mem_ctx);
1353 if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1354 DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1356 krb5_error_code ret;
1357 DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1358 session_info->credentials = cli_credentials_init(session_info);
1359 if (!session_info->credentials) {
1360 talloc_free(mem_ctx);
1361 return NT_STATUS_NO_MEMORY;
1364 cli_credentials_set_event_context(session_info->credentials, gensec_security->event_ctx);
1365 cli_credentials_set_conf(session_info->credentials, gensec_security->lp_ctx);
1366 /* Just so we don't segfault trying to get at a username */
1367 cli_credentials_set_anonymous(session_info->credentials);
1369 ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1370 gensec_security->lp_ctx,
1371 gensec_gssapi_state->delegated_cred_handle,
1374 talloc_free(mem_ctx);
1375 return NT_STATUS_NO_MEMORY;
1378 /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1379 cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1381 /* It has been taken from this place... */
1382 gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1384 talloc_steal(gensec_gssapi_state, session_info);
1385 talloc_free(mem_ctx);
1386 *_session_info = session_info;
1388 return NT_STATUS_OK;
1391 static const char *gensec_gssapi_krb5_oids[] = {
1392 GENSEC_OID_KERBEROS5_OLD,
1393 GENSEC_OID_KERBEROS5,
1397 static const char *gensec_gssapi_spnego_oids[] = {
1402 /* As a server, this could in theory accept any GSSAPI mech */
1403 static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1404 .name = "gssapi_spnego",
1405 .sasl_name = "GSS-SPNEGO",
1406 .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1407 .oid = gensec_gssapi_spnego_oids,
1408 .client_start = gensec_gssapi_client_start,
1409 .server_start = gensec_gssapi_server_start,
1410 .magic = gensec_gssapi_magic,
1411 .update = gensec_gssapi_update,
1412 .session_key = gensec_gssapi_session_key,
1413 .session_info = gensec_gssapi_session_info,
1414 .sign_packet = gensec_gssapi_sign_packet,
1415 .check_packet = gensec_gssapi_check_packet,
1416 .seal_packet = gensec_gssapi_seal_packet,
1417 .unseal_packet = gensec_gssapi_unseal_packet,
1418 .wrap = gensec_gssapi_wrap,
1419 .unwrap = gensec_gssapi_unwrap,
1420 .have_feature = gensec_gssapi_have_feature,
1423 .priority = GENSEC_GSSAPI
1426 /* As a server, this could in theory accept any GSSAPI mech */
1427 static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1428 .name = "gssapi_krb5",
1429 .auth_type = DCERPC_AUTH_TYPE_KRB5,
1430 .oid = gensec_gssapi_krb5_oids,
1431 .client_start = gensec_gssapi_client_start,
1432 .server_start = gensec_gssapi_server_start,
1433 .magic = gensec_gssapi_magic,
1434 .update = gensec_gssapi_update,
1435 .session_key = gensec_gssapi_session_key,
1436 .session_info = gensec_gssapi_session_info,
1437 .sign_packet = gensec_gssapi_sign_packet,
1438 .check_packet = gensec_gssapi_check_packet,
1439 .seal_packet = gensec_gssapi_seal_packet,
1440 .unseal_packet = gensec_gssapi_unseal_packet,
1441 .wrap = gensec_gssapi_wrap,
1442 .unwrap = gensec_gssapi_unwrap,
1443 .have_feature = gensec_gssapi_have_feature,
1446 .priority = GENSEC_GSSAPI
1449 /* As a server, this could in theory accept any GSSAPI mech */
1450 static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1451 .name = "gssapi_krb5_sasl",
1452 .sasl_name = "GSSAPI",
1453 .client_start = gensec_gssapi_sasl_client_start,
1454 .server_start = gensec_gssapi_sasl_server_start,
1455 .update = gensec_gssapi_update,
1456 .session_key = gensec_gssapi_session_key,
1457 .session_info = gensec_gssapi_session_info,
1458 .max_input_size = gensec_gssapi_max_input_size,
1459 .max_wrapped_size = gensec_gssapi_max_wrapped_size,
1460 .wrap = gensec_gssapi_wrap,
1461 .unwrap = gensec_gssapi_unwrap,
1462 .have_feature = gensec_gssapi_have_feature,
1465 .priority = GENSEC_GSSAPI
1468 _PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1472 ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1473 if (!NT_STATUS_IS_OK(ret)) {
1474 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1475 gensec_gssapi_spnego_security_ops.name));
1479 ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1480 if (!NT_STATUS_IS_OK(ret)) {
1481 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1482 gensec_gssapi_krb5_security_ops.name));
1486 ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1487 if (!NT_STATUS_IS_OK(ret)) {
1488 DEBUG(0,("Failed to register '%s' gensec backend!\n",
1489 gensec_gssapi_sasl_krb5_security_ops.name));