2 Unix SMB/CIFS implementation.
4 Kerberos backend for GENSEC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
7 Copyright (C) Andrew Tridgell 2001
8 Copyright (C) Luke Howard 2002-2003
9 Copyright (C) Stefan Metzmacher 2004-2005
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "system/kerberos.h"
28 #include "auth/kerberos/kerberos.h"
29 #include "auth/auth.h"
30 #include "lib/socket/socket.h"
31 #include "lib/tsocket/tsocket.h"
32 #include "librpc/rpc/dcerpc.h"
33 #include "auth/credentials/credentials.h"
34 #include "auth/credentials/credentials_krb5.h"
35 #include "auth/kerberos/kerberos_credentials.h"
36 #include "auth/gensec/gensec.h"
37 #include "auth/gensec/gensec_proto.h"
38 #include "param/param.h"
39 #include "auth/auth_sam_reply.h"
40 #include "lib/util/util_net.h"
42 enum GENSEC_KRB5_STATE {
43 GENSEC_KRB5_SERVER_START,
44 GENSEC_KRB5_CLIENT_START,
45 GENSEC_KRB5_CLIENT_MUTUAL_AUTH,
49 struct gensec_krb5_state {
50 DATA_BLOB session_key;
52 enum GENSEC_KRB5_STATE state_position;
53 struct smb_krb5_context *smb_krb5_context;
54 krb5_auth_context auth_context;
56 krb5_keyblock *keyblock;
59 krb5_flags ap_req_options;
62 static int gensec_krb5_destroy(struct gensec_krb5_state *gensec_krb5_state)
64 if (!gensec_krb5_state->smb_krb5_context) {
65 /* We can't clean anything else up unless we started up this far */
68 if (gensec_krb5_state->enc_ticket.length) {
69 kerberos_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
70 &gensec_krb5_state->enc_ticket);
73 if (gensec_krb5_state->ticket) {
74 krb5_free_ticket(gensec_krb5_state->smb_krb5_context->krb5_context,
75 gensec_krb5_state->ticket);
78 /* ccache freed in a child destructor */
80 krb5_free_keyblock(gensec_krb5_state->smb_krb5_context->krb5_context,
81 gensec_krb5_state->keyblock);
83 if (gensec_krb5_state->auth_context) {
84 krb5_auth_con_free(gensec_krb5_state->smb_krb5_context->krb5_context,
85 gensec_krb5_state->auth_context);
91 static NTSTATUS gensec_krb5_start(struct gensec_security *gensec_security, bool gssapi)
94 struct gensec_krb5_state *gensec_krb5_state;
95 struct cli_credentials *creds;
96 const struct tsocket_address *tlocal_addr, *tremote_addr;
97 krb5_address my_krb5_addr, peer_krb5_addr;
99 creds = gensec_get_credentials(gensec_security);
101 return NT_STATUS_INVALID_PARAMETER;
104 gensec_krb5_state = talloc(gensec_security, struct gensec_krb5_state);
105 if (!gensec_krb5_state) {
106 return NT_STATUS_NO_MEMORY;
109 gensec_security->private_data = gensec_krb5_state;
110 gensec_krb5_state->smb_krb5_context = NULL;
111 gensec_krb5_state->auth_context = NULL;
112 gensec_krb5_state->ticket = NULL;
113 ZERO_STRUCT(gensec_krb5_state->enc_ticket);
114 gensec_krb5_state->keyblock = NULL;
115 gensec_krb5_state->session_key = data_blob(NULL, 0);
116 gensec_krb5_state->pac = data_blob(NULL, 0);
117 gensec_krb5_state->gssapi = gssapi;
119 talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
121 if (cli_credentials_get_krb5_context(creds,
122 gensec_security->settings->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
123 talloc_free(gensec_krb5_state);
124 return NT_STATUS_INTERNAL_ERROR;
127 ret = krb5_auth_con_init(gensec_krb5_state->smb_krb5_context->krb5_context, &gensec_krb5_state->auth_context);
129 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
130 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
131 ret, gensec_krb5_state)));
132 talloc_free(gensec_krb5_state);
133 return NT_STATUS_INTERNAL_ERROR;
136 ret = krb5_auth_con_setflags(gensec_krb5_state->smb_krb5_context->krb5_context,
137 gensec_krb5_state->auth_context,
138 KRB5_AUTH_CONTEXT_DO_SEQUENCE);
140 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
141 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
142 ret, gensec_krb5_state)));
143 talloc_free(gensec_krb5_state);
144 return NT_STATUS_INTERNAL_ERROR;
147 tlocal_addr = gensec_get_local_address(gensec_security);
150 struct sockaddr_storage ss;
152 socklen = tsocket_address_bsd_sockaddr(tlocal_addr,
153 (struct sockaddr *) &ss,
154 sizeof(struct sockaddr_storage));
156 return NT_STATUS_INTERNAL_ERROR;
158 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
159 (const struct sockaddr *) &ss, &my_krb5_addr);
161 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
162 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
163 ret, gensec_krb5_state)));
164 talloc_free(gensec_krb5_state);
165 return NT_STATUS_INTERNAL_ERROR;
169 tremote_addr = gensec_get_remote_address(gensec_security);
172 struct sockaddr_storage ss;
174 socklen = tsocket_address_bsd_sockaddr(tremote_addr,
175 (struct sockaddr *) &ss,
176 sizeof(struct sockaddr_storage));
178 return NT_STATUS_INTERNAL_ERROR;
180 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
181 (const struct sockaddr *) &ss, &peer_krb5_addr);
183 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
184 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
185 ret, gensec_krb5_state)));
186 talloc_free(gensec_krb5_state);
187 return NT_STATUS_INTERNAL_ERROR;
191 ret = krb5_auth_con_setaddrs(gensec_krb5_state->smb_krb5_context->krb5_context,
192 gensec_krb5_state->auth_context,
193 tlocal_addr ? &my_krb5_addr : NULL,
194 tremote_addr ? &peer_krb5_addr : NULL);
196 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
197 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
198 ret, gensec_krb5_state)));
199 talloc_free(gensec_krb5_state);
200 return NT_STATUS_INTERNAL_ERROR;
206 static NTSTATUS gensec_krb5_common_server_start(struct gensec_security *gensec_security, bool gssapi)
209 struct gensec_krb5_state *gensec_krb5_state;
211 nt_status = gensec_krb5_start(gensec_security, gssapi);
212 if (!NT_STATUS_IS_OK(nt_status)) {
216 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
217 gensec_krb5_state->state_position = GENSEC_KRB5_SERVER_START;
222 static NTSTATUS gensec_krb5_server_start(struct gensec_security *gensec_security)
224 return gensec_krb5_common_server_start(gensec_security, false);
227 static NTSTATUS gensec_fake_gssapi_krb5_server_start(struct gensec_security *gensec_security)
229 return gensec_krb5_common_server_start(gensec_security, true);
232 static NTSTATUS gensec_krb5_common_client_start(struct gensec_security *gensec_security, bool gssapi)
234 struct gensec_krb5_state *gensec_krb5_state;
237 struct ccache_container *ccache_container;
238 const char *hostname;
239 const char *error_string;
240 const char *principal;
242 struct tevent_context *previous_ev;
244 hostname = gensec_get_target_hostname(gensec_security);
246 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
247 return NT_STATUS_INVALID_PARAMETER;
249 if (is_ipaddress(hostname)) {
250 DEBUG(2, ("Cannot do krb5 to an IP address"));
251 return NT_STATUS_INVALID_PARAMETER;
253 if (strcmp(hostname, "localhost") == 0) {
254 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
255 return NT_STATUS_INVALID_PARAMETER;
258 nt_status = gensec_krb5_start(gensec_security, gssapi);
259 if (!NT_STATUS_IS_OK(nt_status)) {
263 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
264 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_START;
265 gensec_krb5_state->ap_req_options = AP_OPTS_USE_SUBKEY;
267 if (gensec_krb5_state->gssapi) {
268 /* The Fake GSSAPI modal emulates Samba3, which does not do mutual authentication */
269 if (gensec_setting_bool(gensec_security->settings, "gensec_fake_gssapi_krb5", "mutual", false)) {
270 gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
273 /* The wrapping for KPASSWD (a user of the raw KRB5 API) should be mutually authenticated */
274 if (gensec_setting_bool(gensec_security->settings, "gensec_krb5", "mutual", true)) {
275 gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
279 principal = gensec_get_target_principal(gensec_security);
281 ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security),
282 gensec_security->event_ctx,
283 gensec_security->settings->lp_ctx, &ccache_container, &error_string);
287 case KRB5KDC_ERR_PREAUTH_FAILED:
288 case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
289 return NT_STATUS_LOGON_FAILURE;
290 case KRB5_KDC_UNREACH:
291 DEBUG(3, ("Cannot reach a KDC we require to contact %s: %s\n", principal, error_string));
292 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
293 case KRB5_CC_NOTFOUND:
295 DEBUG(3, ("Error preparing credentials we require to contact %s : %s\n", principal, error_string));
296 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
298 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_string));
299 return NT_STATUS_UNSUCCESSFUL;
303 /* Do this every time, in case we have weird recursive issues here */
304 ret = smb_krb5_context_set_event_ctx(gensec_krb5_state->smb_krb5_context, gensec_security->event_ctx, &previous_ev);
306 DEBUG(1, ("gensec_krb5_start: Setting event context failed\n"));
307 return NT_STATUS_NO_MEMORY;
310 krb5_principal target_principal;
311 ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
314 ret = krb5_mk_req_exact(gensec_krb5_state->smb_krb5_context->krb5_context,
315 &gensec_krb5_state->auth_context,
316 gensec_krb5_state->ap_req_options,
318 &in_data, ccache_container->ccache,
319 &gensec_krb5_state->enc_ticket);
320 krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
324 ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
325 &gensec_krb5_state->auth_context,
326 gensec_krb5_state->ap_req_options,
327 gensec_get_target_service(gensec_security),
329 &in_data, ccache_container->ccache,
330 &gensec_krb5_state->enc_ticket);
333 smb_krb5_context_remove_event_ctx(gensec_krb5_state->smb_krb5_context, previous_ev, gensec_security->event_ctx);
338 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
339 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
340 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
341 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
342 case KRB5_KDC_UNREACH:
343 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
344 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
345 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
346 case KRB5KDC_ERR_PREAUTH_FAILED:
347 case KRB5KRB_AP_ERR_TKT_EXPIRED:
349 /* Too much clock skew - we will need to kinit to re-skew the clock */
350 case KRB5KRB_AP_ERR_SKEW:
351 case KRB5_KDCREP_SKEW:
353 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
354 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
358 /* just don't print a message for these really ordinary messages */
359 case KRB5_FCC_NOFILE:
360 case KRB5_CC_NOTFOUND:
363 return NT_STATUS_UNSUCCESSFUL;
367 DEBUG(0, ("kerberos: %s\n",
368 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
369 return NT_STATUS_UNSUCCESSFUL;
373 static NTSTATUS gensec_krb5_client_start(struct gensec_security *gensec_security)
375 return gensec_krb5_common_client_start(gensec_security, false);
378 static NTSTATUS gensec_fake_gssapi_krb5_client_start(struct gensec_security *gensec_security)
380 return gensec_krb5_common_client_start(gensec_security, true);
384 * Check if the packet is one for this mechansim
386 * @param gensec_security GENSEC state
387 * @param in The request, as a DATA_BLOB
388 * @return Error, INVALID_PARAMETER if it's not a packet for us
389 * or NT_STATUS_OK if the packet is ok.
392 static NTSTATUS gensec_fake_gssapi_krb5_magic(struct gensec_security *gensec_security,
395 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
398 return NT_STATUS_INVALID_PARAMETER;
404 * Next state function for the Krb5 GENSEC mechanism
406 * @param gensec_krb5_state KRB5 State
407 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
408 * @param in The request, as a DATA_BLOB
409 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
410 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
411 * or NT_STATUS_OK if the user is authenticated.
414 static NTSTATUS gensec_krb5_update(struct gensec_security *gensec_security,
415 TALLOC_CTX *out_mem_ctx,
416 const DATA_BLOB in, DATA_BLOB *out)
418 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
419 krb5_error_code ret = 0;
422 switch (gensec_krb5_state->state_position) {
423 case GENSEC_KRB5_CLIENT_START:
425 DATA_BLOB unwrapped_out;
427 if (gensec_krb5_state->gssapi) {
428 unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
430 /* wrap that up in a nice GSS-API wrapping */
431 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REQ);
433 *out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
435 if (gensec_krb5_state->ap_req_options & AP_OPTS_MUTUAL_REQUIRED) {
436 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_MUTUAL_AUTH;
437 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
439 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
440 nt_status = NT_STATUS_OK;
445 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH:
447 DATA_BLOB unwrapped_in;
449 krb5_ap_rep_enc_part *repl = NULL;
452 if (gensec_krb5_state->gssapi) {
453 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
454 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
455 dump_data_pw("Mutual authentication message:\n", in.data, in.length);
456 return NT_STATUS_INVALID_PARAMETER;
461 /* TODO: check the tok_id */
463 inbuf.data = unwrapped_in.data;
464 inbuf.length = unwrapped_in.length;
465 ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
466 gensec_krb5_state->auth_context,
469 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
470 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, out_mem_ctx)));
471 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf.data, inbuf.length);
472 nt_status = NT_STATUS_ACCESS_DENIED;
474 *out = data_blob(NULL, 0);
475 nt_status = NT_STATUS_OK;
476 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
479 krb5_free_ap_rep_enc_part(gensec_krb5_state->smb_krb5_context->krb5_context, repl);
484 case GENSEC_KRB5_SERVER_START:
486 DATA_BLOB unwrapped_in;
487 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
488 krb5_data inbuf, outbuf;
490 struct keytab_container *keytab;
491 krb5_principal server_in_keytab;
492 const char *error_string;
493 enum credentials_obtained obtained;
496 return NT_STATUS_INVALID_PARAMETER;
499 /* Grab the keytab, however generated */
500 ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security),
501 gensec_security->settings->lp_ctx, &keytab);
503 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
506 /* This ensures we lookup the correct entry in that keytab */
507 ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
508 gensec_krb5_state->smb_krb5_context,
509 &server_in_keytab, &obtained, &error_string);
512 DEBUG(2,("Failed to make credentials from principal: %s\n", error_string));
513 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
516 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
517 if (gensec_krb5_state->gssapi
518 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
519 inbuf.data = unwrapped_in.data;
520 inbuf.length = unwrapped_in.length;
522 inbuf.data = in.data;
523 inbuf.length = in.length;
526 ret = smb_rd_req_return_stuff(gensec_krb5_state->smb_krb5_context->krb5_context,
527 &gensec_krb5_state->auth_context,
528 &inbuf, keytab->keytab, server_in_keytab,
530 &gensec_krb5_state->ticket,
531 &gensec_krb5_state->keyblock);
534 return NT_STATUS_LOGON_FAILURE;
536 unwrapped_out.data = (uint8_t *)outbuf.data;
537 unwrapped_out.length = outbuf.length;
538 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
539 /* wrap that up in a nice GSS-API wrapping */
540 if (gensec_krb5_state->gssapi) {
541 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REP);
543 *out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
545 krb5_data_free(&outbuf);
549 case GENSEC_KRB5_DONE:
551 /* Asking too many times... */
552 return NT_STATUS_INVALID_PARAMETER;
556 static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
557 DATA_BLOB *session_key)
559 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
560 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
561 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
563 krb5_error_code err = -1;
565 if (gensec_krb5_state->state_position != GENSEC_KRB5_DONE) {
566 return NT_STATUS_NO_USER_SESSION_KEY;
569 if (gensec_krb5_state->session_key.data) {
570 *session_key = gensec_krb5_state->session_key;
574 switch (gensec_security->gensec_role) {
576 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
579 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
582 if (err == 0 && skey != NULL) {
583 DEBUG(10, ("Got KRB5 session key of length %d\n",
584 (int)KRB5_KEY_LENGTH(skey)));
585 gensec_krb5_state->session_key = data_blob_talloc(gensec_krb5_state,
586 KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
587 *session_key = gensec_krb5_state->session_key;
588 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
590 krb5_free_keyblock(context, skey);
593 DEBUG(10, ("KRB5 error getting session key %d\n", err));
594 return NT_STATUS_NO_USER_SESSION_KEY;
598 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
599 struct auth_session_info **_session_info)
601 NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
602 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
603 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
604 struct auth_serversupplied_info *server_info = NULL;
605 struct auth_session_info *session_info = NULL;
606 struct PAC_LOGON_INFO *logon_info;
608 krb5_principal client_principal;
609 char *principal_string;
616 TALLOC_CTX *mem_ctx = talloc_new(gensec_security);
618 return NT_STATUS_NO_MEMORY;
621 ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
623 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
624 smb_get_krb5_error_message(context,
626 talloc_free(mem_ctx);
627 return NT_STATUS_NO_MEMORY;
630 ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
631 client_principal, &principal_string);
633 DEBUG(1, ("Unable to parse client principal: %s\n",
634 smb_get_krb5_error_message(context,
636 talloc_free(mem_ctx);
637 return NT_STATUS_NO_MEMORY;
640 ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
641 KRB5_AUTHDATA_WIN2K_PAC,
644 if (ret && gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
645 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
647 smb_get_krb5_error_message(context,
649 krb5_free_principal(context, client_principal);
650 free(principal_string);
651 return NT_STATUS_ACCESS_DENIED;
654 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
655 smb_get_krb5_error_message(context,
657 if (gensec_security->auth_context &&
658 !gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
659 DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup: %s",
660 principal_string, smb_get_krb5_error_message(context,
662 nt_status = gensec_security->auth_context->get_server_info_principal(mem_ctx,
663 gensec_security->auth_context,
666 if (!NT_STATUS_IS_OK(nt_status)) {
667 talloc_free(mem_ctx);
671 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
673 free(principal_string);
674 krb5_free_principal(context, client_principal);
675 talloc_free(mem_ctx);
676 return NT_STATUS_ACCESS_DENIED;
680 union netr_Validation validation;
681 free(principal_string);
683 pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
685 krb5_free_principal(context, client_principal);
686 talloc_free(mem_ctx);
687 return NT_STATUS_NO_MEMORY;
690 /* decode and verify the pac */
691 nt_status = kerberos_pac_logon_info(gensec_krb5_state,
693 gensec_krb5_state->smb_krb5_context->krb5_context,
694 NULL, gensec_krb5_state->keyblock,
696 gensec_krb5_state->ticket->ticket.authtime, NULL);
697 krb5_free_principal(context, client_principal);
699 if (!NT_STATUS_IS_OK(nt_status)) {
700 talloc_free(mem_ctx);
704 validation.sam3 = &logon_info->info3;
705 nt_status = make_server_info_netlogon_validation(mem_ctx,
709 if (!NT_STATUS_IS_OK(nt_status)) {
710 talloc_free(mem_ctx);
715 /* references the server_info into the session_info */
716 nt_status = gensec_generate_session_info(mem_ctx, gensec_security, server_info, &session_info);
718 if (!NT_STATUS_IS_OK(nt_status)) {
719 talloc_free(mem_ctx);
723 nt_status = gensec_krb5_session_key(gensec_security, &session_info->session_key);
725 if (!NT_STATUS_IS_OK(nt_status)) {
726 talloc_free(mem_ctx);
730 *_session_info = session_info;
732 talloc_steal(gensec_krb5_state, session_info);
733 talloc_free(mem_ctx);
737 static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
742 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
743 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
744 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
746 krb5_data input, output;
747 input.length = in->length;
748 input.data = in->data;
750 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
751 ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
753 DEBUG(1, ("krb5_mk_priv failed: %s\n",
754 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
756 return NT_STATUS_ACCESS_DENIED;
758 *out = data_blob_talloc(mem_ctx, output.data, output.length);
760 krb5_data_free(&output);
762 return NT_STATUS_ACCESS_DENIED;
767 static NTSTATUS gensec_krb5_unwrap(struct gensec_security *gensec_security,
772 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
773 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
774 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
776 krb5_data input, output;
777 krb5_replay_data replay;
778 input.length = in->length;
779 input.data = in->data;
781 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
782 ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
784 DEBUG(1, ("krb5_rd_priv failed: %s\n",
785 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
787 return NT_STATUS_ACCESS_DENIED;
789 *out = data_blob_talloc(mem_ctx, output.data, output.length);
791 krb5_data_free(&output);
793 return NT_STATUS_ACCESS_DENIED;
798 static bool gensec_krb5_have_feature(struct gensec_security *gensec_security,
801 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
802 if (feature & GENSEC_FEATURE_SESSION_KEY) {
805 if (!gensec_krb5_state->gssapi &&
806 (feature & GENSEC_FEATURE_SEAL)) {
813 static const char *gensec_krb5_oids[] = {
814 GENSEC_OID_KERBEROS5,
815 GENSEC_OID_KERBEROS5_OLD,
819 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops = {
820 .name = "fake_gssapi_krb5",
821 .auth_type = DCERPC_AUTH_TYPE_KRB5,
822 .oid = gensec_krb5_oids,
823 .client_start = gensec_fake_gssapi_krb5_client_start,
824 .server_start = gensec_fake_gssapi_krb5_server_start,
825 .update = gensec_krb5_update,
826 .magic = gensec_fake_gssapi_krb5_magic,
827 .session_key = gensec_krb5_session_key,
828 .session_info = gensec_krb5_session_info,
829 .have_feature = gensec_krb5_have_feature,
832 .priority = GENSEC_KRB5
835 static const struct gensec_security_ops gensec_krb5_security_ops = {
837 .client_start = gensec_krb5_client_start,
838 .server_start = gensec_krb5_server_start,
839 .update = gensec_krb5_update,
840 .session_key = gensec_krb5_session_key,
841 .session_info = gensec_krb5_session_info,
842 .have_feature = gensec_krb5_have_feature,
843 .wrap = gensec_krb5_wrap,
844 .unwrap = gensec_krb5_unwrap,
847 .priority = GENSEC_KRB5
850 _PUBLIC_ NTSTATUS gensec_krb5_init(void)
854 ret = gensec_register(&gensec_krb5_security_ops);
855 if (!NT_STATUS_IS_OK(ret)) {
856 DEBUG(0,("Failed to register '%s' gensec backend!\n",
857 gensec_krb5_security_ops.name));
861 ret = gensec_register(&gensec_fake_gssapi_krb5_security_ops);
862 if (!NT_STATUS_IS_OK(ret)) {
863 DEBUG(0,("Failed to register '%s' gensec backend!\n",
864 gensec_krb5_security_ops.name));