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 "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 "system/network.h"
34 #include "lib/socket/socket.h"
35 #include "librpc/rpc/dcerpc.h"
36 #include "auth/credentials/credentials.h"
37 #include "auth/credentials/credentials_krb5.h"
38 #include "auth/gensec/gensec.h"
39 #include "param/param.h"
41 enum GENSEC_KRB5_STATE {
42 GENSEC_KRB5_SERVER_START,
43 GENSEC_KRB5_CLIENT_START,
44 GENSEC_KRB5_CLIENT_MUTUAL_AUTH,
48 struct gensec_krb5_state {
49 DATA_BLOB session_key;
51 enum GENSEC_KRB5_STATE state_position;
52 struct smb_krb5_context *smb_krb5_context;
53 krb5_auth_context auth_context;
55 krb5_keyblock *keyblock;
60 static int gensec_krb5_destroy(struct gensec_krb5_state *gensec_krb5_state)
62 if (!gensec_krb5_state->smb_krb5_context) {
63 /* We can't clean anything else up unless we started up this far */
66 if (gensec_krb5_state->enc_ticket.length) {
67 kerberos_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
68 &gensec_krb5_state->enc_ticket);
71 if (gensec_krb5_state->ticket) {
72 krb5_free_ticket(gensec_krb5_state->smb_krb5_context->krb5_context,
73 gensec_krb5_state->ticket);
76 /* ccache freed in a child destructor */
78 krb5_free_keyblock(gensec_krb5_state->smb_krb5_context->krb5_context,
79 gensec_krb5_state->keyblock);
81 if (gensec_krb5_state->auth_context) {
82 krb5_auth_con_free(gensec_krb5_state->smb_krb5_context->krb5_context,
83 gensec_krb5_state->auth_context);
89 static NTSTATUS gensec_krb5_start(struct gensec_security *gensec_security)
92 struct gensec_krb5_state *gensec_krb5_state;
93 struct cli_credentials *creds;
94 const struct socket_address *my_addr, *peer_addr;
95 krb5_address my_krb5_addr, peer_krb5_addr;
97 creds = gensec_get_credentials(gensec_security);
99 return NT_STATUS_INVALID_PARAMETER;
102 gensec_krb5_state = talloc(gensec_security, struct gensec_krb5_state);
103 if (!gensec_krb5_state) {
104 return NT_STATUS_NO_MEMORY;
107 gensec_security->private_data = gensec_krb5_state;
108 gensec_krb5_state->smb_krb5_context = NULL;
109 gensec_krb5_state->auth_context = NULL;
110 gensec_krb5_state->ticket = NULL;
111 ZERO_STRUCT(gensec_krb5_state->enc_ticket);
112 gensec_krb5_state->keyblock = NULL;
113 gensec_krb5_state->session_key = data_blob(NULL, 0);
114 gensec_krb5_state->pac = data_blob(NULL, 0);
115 gensec_krb5_state->gssapi = false;
117 talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
119 if (cli_credentials_get_krb5_context(creds, gensec_security->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
120 talloc_free(gensec_krb5_state);
121 return NT_STATUS_INTERNAL_ERROR;
124 ret = krb5_auth_con_init(gensec_krb5_state->smb_krb5_context->krb5_context, &gensec_krb5_state->auth_context);
126 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
127 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
128 ret, gensec_krb5_state)));
129 talloc_free(gensec_krb5_state);
130 return NT_STATUS_INTERNAL_ERROR;
133 ret = krb5_auth_con_setflags(gensec_krb5_state->smb_krb5_context->krb5_context,
134 gensec_krb5_state->auth_context,
135 KRB5_AUTH_CONTEXT_DO_SEQUENCE);
137 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
138 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
139 ret, gensec_krb5_state)));
140 talloc_free(gensec_krb5_state);
141 return NT_STATUS_INTERNAL_ERROR;
144 my_addr = gensec_get_my_addr(gensec_security);
145 if (my_addr && my_addr->sockaddr) {
146 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
147 my_addr->sockaddr, &my_krb5_addr);
149 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
150 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
151 ret, gensec_krb5_state)));
152 talloc_free(gensec_krb5_state);
153 return NT_STATUS_INTERNAL_ERROR;
157 peer_addr = gensec_get_peer_addr(gensec_security);
158 if (peer_addr && peer_addr->sockaddr) {
159 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
160 peer_addr->sockaddr, &peer_krb5_addr);
162 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
163 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
164 ret, gensec_krb5_state)));
165 talloc_free(gensec_krb5_state);
166 return NT_STATUS_INTERNAL_ERROR;
170 ret = krb5_auth_con_setaddrs(gensec_krb5_state->smb_krb5_context->krb5_context,
171 gensec_krb5_state->auth_context,
172 my_addr ? &my_krb5_addr : NULL,
173 peer_addr ? &peer_krb5_addr : NULL);
175 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
176 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
177 ret, gensec_krb5_state)));
178 talloc_free(gensec_krb5_state);
179 return NT_STATUS_INTERNAL_ERROR;
185 static NTSTATUS gensec_krb5_server_start(struct gensec_security *gensec_security)
188 struct gensec_krb5_state *gensec_krb5_state;
190 nt_status = gensec_krb5_start(gensec_security);
191 if (!NT_STATUS_IS_OK(nt_status)) {
195 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
196 gensec_krb5_state->state_position = GENSEC_KRB5_SERVER_START;
201 static NTSTATUS gensec_fake_gssapi_krb5_server_start(struct gensec_security *gensec_security)
203 NTSTATUS nt_status = gensec_krb5_server_start(gensec_security);
205 if (NT_STATUS_IS_OK(nt_status)) {
206 struct gensec_krb5_state *gensec_krb5_state;
207 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
208 gensec_krb5_state->gssapi = true;
213 static NTSTATUS gensec_krb5_client_start(struct gensec_security *gensec_security)
215 struct gensec_krb5_state *gensec_krb5_state;
218 struct ccache_container *ccache_container;
219 const char *hostname;
220 krb5_flags ap_req_options = AP_OPTS_USE_SUBKEY | AP_OPTS_MUTUAL_REQUIRED;
222 const char *principal;
225 hostname = gensec_get_target_hostname(gensec_security);
227 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
228 return NT_STATUS_INVALID_PARAMETER;
230 if (is_ipaddress(hostname)) {
231 DEBUG(2, ("Cannot do krb5 to an IP address"));
232 return NT_STATUS_INVALID_PARAMETER;
234 if (strcmp(hostname, "localhost") == 0) {
235 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
236 return NT_STATUS_INVALID_PARAMETER;
239 nt_status = gensec_krb5_start(gensec_security);
240 if (!NT_STATUS_IS_OK(nt_status)) {
244 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
245 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_START;
247 principal = gensec_get_target_principal(gensec_security);
249 ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security), gensec_security->lp_ctx, &ccache_container);
253 case KRB5KDC_ERR_PREAUTH_FAILED:
254 return NT_STATUS_LOGON_FAILURE;
255 case KRB5_KDC_UNREACH:
256 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
257 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
259 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_message(ret)));
260 return NT_STATUS_UNSUCCESSFUL;
264 if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
265 krb5_principal target_principal;
266 ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
269 ret = krb5_mk_req_exact(gensec_krb5_state->smb_krb5_context->krb5_context,
270 &gensec_krb5_state->auth_context,
273 &in_data, ccache_container->ccache,
274 &gensec_krb5_state->enc_ticket);
275 krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
279 ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
280 &gensec_krb5_state->auth_context,
282 gensec_get_target_service(gensec_security),
284 &in_data, ccache_container->ccache,
285 &gensec_krb5_state->enc_ticket);
290 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
291 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
292 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
293 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
294 case KRB5_KDC_UNREACH:
295 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
296 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
297 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
298 case KRB5KDC_ERR_PREAUTH_FAILED:
299 case KRB5KRB_AP_ERR_TKT_EXPIRED:
301 /* Too much clock skew - we will need to kinit to re-skew the clock */
302 case KRB5KRB_AP_ERR_SKEW:
303 case KRB5_KDCREP_SKEW:
305 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
306 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
310 /* just don't print a message for these really ordinary messages */
311 case KRB5_FCC_NOFILE:
312 case KRB5_CC_NOTFOUND:
315 return NT_STATUS_UNSUCCESSFUL;
319 DEBUG(0, ("kerberos: %s\n",
320 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
321 return NT_STATUS_UNSUCCESSFUL;
325 static NTSTATUS gensec_fake_gssapi_krb5_client_start(struct gensec_security *gensec_security)
327 NTSTATUS nt_status = gensec_krb5_client_start(gensec_security);
329 if (NT_STATUS_IS_OK(nt_status)) {
330 struct gensec_krb5_state *gensec_krb5_state;
331 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
332 gensec_krb5_state->gssapi = true;
338 * Check if the packet is one for this mechansim
340 * @param gensec_security GENSEC state
341 * @param in The request, as a DATA_BLOB
342 * @return Error, INVALID_PARAMETER if it's not a packet for us
343 * or NT_STATUS_OK if the packet is ok.
346 static NTSTATUS gensec_fake_gssapi_krb5_magic(struct gensec_security *gensec_security,
349 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
352 return NT_STATUS_INVALID_PARAMETER;
358 * Next state function for the Krb5 GENSEC mechanism
360 * @param gensec_krb5_state KRB5 State
361 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
362 * @param in The request, as a DATA_BLOB
363 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
364 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
365 * or NT_STATUS_OK if the user is authenticated.
368 static NTSTATUS gensec_krb5_update(struct gensec_security *gensec_security,
369 TALLOC_CTX *out_mem_ctx,
370 const DATA_BLOB in, DATA_BLOB *out)
372 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
373 krb5_error_code ret = 0;
376 switch (gensec_krb5_state->state_position) {
377 case GENSEC_KRB5_CLIENT_START:
379 DATA_BLOB unwrapped_out;
381 if (gensec_krb5_state->gssapi) {
382 unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
384 /* wrap that up in a nice GSS-API wrapping */
385 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REQ);
387 *out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
389 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_MUTUAL_AUTH;
390 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
394 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH:
396 DATA_BLOB unwrapped_in;
398 krb5_ap_rep_enc_part *repl = NULL;
401 if (gensec_krb5_state->gssapi) {
402 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
403 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
404 dump_data_pw("Mutual authentication message:\n", in.data, in.length);
405 return NT_STATUS_INVALID_PARAMETER;
410 /* TODO: check the tok_id */
412 inbuf.data = unwrapped_in.data;
413 inbuf.length = unwrapped_in.length;
414 ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
415 gensec_krb5_state->auth_context,
418 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
419 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, out_mem_ctx)));
420 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf.data, inbuf.length);
421 nt_status = NT_STATUS_ACCESS_DENIED;
423 *out = data_blob(NULL, 0);
424 nt_status = NT_STATUS_OK;
425 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
428 krb5_free_ap_rep_enc_part(gensec_krb5_state->smb_krb5_context->krb5_context, repl);
433 case GENSEC_KRB5_SERVER_START:
435 DATA_BLOB unwrapped_in;
436 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
437 krb5_data inbuf, outbuf;
439 struct keytab_container *keytab;
440 krb5_principal server_in_keytab;
443 return NT_STATUS_INVALID_PARAMETER;
446 /* Grab the keytab, however generated */
447 ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security), gensec_security->lp_ctx, &keytab);
449 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
452 /* This ensures we lookup the correct entry in that keytab */
453 ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
454 gensec_krb5_state->smb_krb5_context,
458 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
461 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
462 if (gensec_krb5_state->gssapi
463 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
464 inbuf.data = unwrapped_in.data;
465 inbuf.length = unwrapped_in.length;
467 inbuf.data = in.data;
468 inbuf.length = in.length;
471 ret = smb_rd_req_return_stuff(gensec_krb5_state->smb_krb5_context->krb5_context,
472 &gensec_krb5_state->auth_context,
473 &inbuf, keytab->keytab, server_in_keytab,
475 &gensec_krb5_state->ticket,
476 &gensec_krb5_state->keyblock);
479 return NT_STATUS_LOGON_FAILURE;
481 unwrapped_out.data = (uint8_t *)outbuf.data;
482 unwrapped_out.length = outbuf.length;
483 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
484 /* wrap that up in a nice GSS-API wrapping */
485 if (gensec_krb5_state->gssapi) {
486 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REP);
488 *out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
490 krb5_data_free(&outbuf);
494 case GENSEC_KRB5_DONE:
496 /* Asking too many times... */
497 return NT_STATUS_INVALID_PARAMETER;
501 static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
502 DATA_BLOB *session_key)
504 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
505 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
506 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
508 krb5_error_code err = -1;
510 if (gensec_krb5_state->session_key.data) {
511 *session_key = gensec_krb5_state->session_key;
515 switch (gensec_security->gensec_role) {
517 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
520 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
523 if (err == 0 && skey != NULL) {
524 DEBUG(10, ("Got KRB5 session key of length %d\n",
525 (int)KRB5_KEY_LENGTH(skey)));
526 gensec_krb5_state->session_key = data_blob_talloc(gensec_krb5_state,
527 KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
528 *session_key = gensec_krb5_state->session_key;
529 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
531 krb5_free_keyblock(context, skey);
534 DEBUG(10, ("KRB5 error getting session key %d\n", err));
535 return NT_STATUS_NO_USER_SESSION_KEY;
539 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
540 struct auth_session_info **_session_info)
542 NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
543 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
544 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
545 struct auth_serversupplied_info *server_info = NULL;
546 struct auth_session_info *session_info = NULL;
547 struct PAC_LOGON_INFO *logon_info;
549 krb5_principal client_principal;
550 char *principal_string;
557 TALLOC_CTX *mem_ctx = talloc_new(gensec_security);
559 return NT_STATUS_NO_MEMORY;
562 ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
564 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
565 smb_get_krb5_error_message(context,
567 talloc_free(mem_ctx);
568 return NT_STATUS_NO_MEMORY;
571 ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
572 client_principal, &principal_string);
574 DEBUG(1, ("Unable to parse client principal: %s\n",
575 smb_get_krb5_error_message(context,
577 talloc_free(mem_ctx);
578 return NT_STATUS_NO_MEMORY;
581 ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
582 KRB5_AUTHDATA_WIN2K_PAC,
585 if (ret && lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
586 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
588 smb_get_krb5_error_message(context,
590 krb5_free_principal(context, client_principal);
591 free(principal_string);
592 return NT_STATUS_ACCESS_DENIED;
595 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
596 smb_get_krb5_error_message(context,
598 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->lp_ctx, principal_string,
600 krb5_free_principal(context, client_principal);
601 free(principal_string);
603 if (!NT_STATUS_IS_OK(nt_status)) {
604 talloc_free(mem_ctx);
609 union netr_Validation validation;
610 free(principal_string);
612 pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
614 krb5_free_principal(context, client_principal);
615 talloc_free(mem_ctx);
616 return NT_STATUS_NO_MEMORY;
619 /* decode and verify the pac */
620 nt_status = kerberos_pac_logon_info(gensec_krb5_state,
621 lp_iconv_convenience(gensec_security->lp_ctx),
623 gensec_krb5_state->smb_krb5_context->krb5_context,
624 NULL, gensec_krb5_state->keyblock,
626 gensec_krb5_state->ticket->ticket.authtime, NULL);
627 krb5_free_principal(context, client_principal);
629 if (!NT_STATUS_IS_OK(nt_status)) {
630 talloc_free(mem_ctx);
634 validation.sam3 = &logon_info->info3;
635 nt_status = make_server_info_netlogon_validation(mem_ctx,
639 if (!NT_STATUS_IS_OK(nt_status)) {
640 talloc_free(mem_ctx);
645 /* references the server_info into the session_info */
646 nt_status = auth_generate_session_info(mem_ctx, gensec_security->lp_ctx, server_info, &session_info);
648 if (!NT_STATUS_IS_OK(nt_status)) {
649 talloc_free(mem_ctx);
653 nt_status = gensec_krb5_session_key(gensec_security, &session_info->session_key);
655 if (!NT_STATUS_IS_OK(nt_status)) {
656 talloc_free(mem_ctx);
660 *_session_info = session_info;
662 talloc_steal(gensec_krb5_state, session_info);
663 talloc_free(mem_ctx);
667 static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
672 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
673 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
674 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
676 krb5_data input, output;
677 input.length = in->length;
678 input.data = in->data;
680 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
681 ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
683 DEBUG(1, ("krb5_mk_priv failed: %s\n",
684 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
686 return NT_STATUS_ACCESS_DENIED;
688 *out = data_blob_talloc(mem_ctx, output.data, output.length);
690 krb5_data_free(&output);
692 return NT_STATUS_ACCESS_DENIED;
697 static NTSTATUS gensec_krb5_unwrap(struct gensec_security *gensec_security,
702 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
703 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
704 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
706 krb5_data input, output;
707 krb5_replay_data replay;
708 input.length = in->length;
709 input.data = in->data;
711 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
712 ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
714 DEBUG(1, ("krb5_rd_priv failed: %s\n",
715 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
717 return NT_STATUS_ACCESS_DENIED;
719 *out = data_blob_talloc(mem_ctx, output.data, output.length);
721 krb5_data_free(&output);
723 return NT_STATUS_ACCESS_DENIED;
728 static bool gensec_krb5_have_feature(struct gensec_security *gensec_security,
731 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
732 if (feature & GENSEC_FEATURE_SESSION_KEY) {
735 if (!gensec_krb5_state->gssapi &&
736 (feature & GENSEC_FEATURE_SEAL)) {
743 static const char *gensec_krb5_oids[] = {
744 GENSEC_OID_KERBEROS5,
745 GENSEC_OID_KERBEROS5_OLD,
749 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops = {
750 .name = "fake_gssapi_krb5",
751 .auth_type = DCERPC_AUTH_TYPE_KRB5,
752 .oid = gensec_krb5_oids,
753 .client_start = gensec_fake_gssapi_krb5_client_start,
754 .server_start = gensec_fake_gssapi_krb5_server_start,
755 .update = gensec_krb5_update,
756 .magic = gensec_fake_gssapi_krb5_magic,
757 .session_key = gensec_krb5_session_key,
758 .session_info = gensec_krb5_session_info,
759 .have_feature = gensec_krb5_have_feature,
762 .priority = GENSEC_KRB5
765 static const struct gensec_security_ops gensec_krb5_security_ops = {
767 .client_start = gensec_krb5_client_start,
768 .server_start = gensec_krb5_server_start,
769 .update = gensec_krb5_update,
770 .session_key = gensec_krb5_session_key,
771 .session_info = gensec_krb5_session_info,
772 .have_feature = gensec_krb5_have_feature,
773 .wrap = gensec_krb5_wrap,
774 .unwrap = gensec_krb5_unwrap,
777 .priority = GENSEC_KRB5
780 _PUBLIC_ NTSTATUS gensec_krb5_init(void)
786 ret = gensec_register(&gensec_krb5_security_ops);
787 if (!NT_STATUS_IS_OK(ret)) {
788 DEBUG(0,("Failed to register '%s' gensec backend!\n",
789 gensec_krb5_security_ops.name));
793 ret = gensec_register(&gensec_fake_gssapi_krb5_security_ops);
794 if (!NT_STATUS_IS_OK(ret)) {
795 DEBUG(0,("Failed to register '%s' gensec backend!\n",
796 gensec_krb5_security_ops.name));