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 "auth/gensec/gensec_proto.h"
40 #include "param/param.h"
41 #include "auth/session_proto.h"
43 enum GENSEC_KRB5_STATE {
44 GENSEC_KRB5_SERVER_START,
45 GENSEC_KRB5_CLIENT_START,
46 GENSEC_KRB5_CLIENT_MUTUAL_AUTH,
50 struct gensec_krb5_state {
51 DATA_BLOB session_key;
53 enum GENSEC_KRB5_STATE state_position;
54 struct smb_krb5_context *smb_krb5_context;
55 krb5_auth_context auth_context;
57 krb5_keyblock *keyblock;
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)
94 struct gensec_krb5_state *gensec_krb5_state;
95 struct cli_credentials *creds;
96 const struct socket_address *my_addr, *peer_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 = false;
119 talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
121 if (cli_credentials_get_krb5_context(creds,
122 gensec_security->event_ctx,
123 gensec_security->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
124 talloc_free(gensec_krb5_state);
125 return NT_STATUS_INTERNAL_ERROR;
128 ret = krb5_auth_con_init(gensec_krb5_state->smb_krb5_context->krb5_context, &gensec_krb5_state->auth_context);
130 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
131 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
132 ret, gensec_krb5_state)));
133 talloc_free(gensec_krb5_state);
134 return NT_STATUS_INTERNAL_ERROR;
137 ret = krb5_auth_con_setflags(gensec_krb5_state->smb_krb5_context->krb5_context,
138 gensec_krb5_state->auth_context,
139 KRB5_AUTH_CONTEXT_DO_SEQUENCE);
141 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
142 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
143 ret, gensec_krb5_state)));
144 talloc_free(gensec_krb5_state);
145 return NT_STATUS_INTERNAL_ERROR;
148 my_addr = gensec_get_my_addr(gensec_security);
149 if (my_addr && my_addr->sockaddr) {
150 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
151 my_addr->sockaddr, &my_krb5_addr);
153 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
154 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
155 ret, gensec_krb5_state)));
156 talloc_free(gensec_krb5_state);
157 return NT_STATUS_INTERNAL_ERROR;
161 peer_addr = gensec_get_peer_addr(gensec_security);
162 if (peer_addr && peer_addr->sockaddr) {
163 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
164 peer_addr->sockaddr, &peer_krb5_addr);
166 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
167 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
168 ret, gensec_krb5_state)));
169 talloc_free(gensec_krb5_state);
170 return NT_STATUS_INTERNAL_ERROR;
174 ret = krb5_auth_con_setaddrs(gensec_krb5_state->smb_krb5_context->krb5_context,
175 gensec_krb5_state->auth_context,
176 my_addr ? &my_krb5_addr : NULL,
177 peer_addr ? &peer_krb5_addr : NULL);
179 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
180 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
181 ret, gensec_krb5_state)));
182 talloc_free(gensec_krb5_state);
183 return NT_STATUS_INTERNAL_ERROR;
189 static NTSTATUS gensec_krb5_server_start(struct gensec_security *gensec_security)
192 struct gensec_krb5_state *gensec_krb5_state;
194 nt_status = gensec_krb5_start(gensec_security);
195 if (!NT_STATUS_IS_OK(nt_status)) {
199 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
200 gensec_krb5_state->state_position = GENSEC_KRB5_SERVER_START;
205 static NTSTATUS gensec_fake_gssapi_krb5_server_start(struct gensec_security *gensec_security)
207 NTSTATUS nt_status = gensec_krb5_server_start(gensec_security);
209 if (NT_STATUS_IS_OK(nt_status)) {
210 struct gensec_krb5_state *gensec_krb5_state;
211 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
212 gensec_krb5_state->gssapi = true;
217 static NTSTATUS gensec_krb5_client_start(struct gensec_security *gensec_security)
219 struct gensec_krb5_state *gensec_krb5_state;
222 struct ccache_container *ccache_container;
223 const char *hostname;
224 krb5_flags ap_req_options = AP_OPTS_USE_SUBKEY | AP_OPTS_MUTUAL_REQUIRED;
226 const char *principal;
229 hostname = gensec_get_target_hostname(gensec_security);
231 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
232 return NT_STATUS_INVALID_PARAMETER;
234 if (is_ipaddress(hostname)) {
235 DEBUG(2, ("Cannot do krb5 to an IP address"));
236 return NT_STATUS_INVALID_PARAMETER;
238 if (strcmp(hostname, "localhost") == 0) {
239 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
240 return NT_STATUS_INVALID_PARAMETER;
243 nt_status = gensec_krb5_start(gensec_security);
244 if (!NT_STATUS_IS_OK(nt_status)) {
248 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
249 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_START;
251 principal = gensec_get_target_principal(gensec_security);
253 ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security),
254 gensec_security->event_ctx,
255 gensec_security->lp_ctx, &ccache_container);
259 case KRB5KDC_ERR_PREAUTH_FAILED:
260 return NT_STATUS_LOGON_FAILURE;
261 case KRB5_KDC_UNREACH:
262 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
263 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
265 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_message(ret)));
266 return NT_STATUS_UNSUCCESSFUL;
270 if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
271 krb5_principal target_principal;
272 ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
275 ret = krb5_mk_req_exact(gensec_krb5_state->smb_krb5_context->krb5_context,
276 &gensec_krb5_state->auth_context,
279 &in_data, ccache_container->ccache,
280 &gensec_krb5_state->enc_ticket);
281 krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
285 ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
286 &gensec_krb5_state->auth_context,
288 gensec_get_target_service(gensec_security),
290 &in_data, ccache_container->ccache,
291 &gensec_krb5_state->enc_ticket);
296 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
297 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
298 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
299 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
300 case KRB5_KDC_UNREACH:
301 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
302 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
303 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
304 case KRB5KDC_ERR_PREAUTH_FAILED:
305 case KRB5KRB_AP_ERR_TKT_EXPIRED:
307 /* Too much clock skew - we will need to kinit to re-skew the clock */
308 case KRB5KRB_AP_ERR_SKEW:
309 case KRB5_KDCREP_SKEW:
311 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
312 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
316 /* just don't print a message for these really ordinary messages */
317 case KRB5_FCC_NOFILE:
318 case KRB5_CC_NOTFOUND:
321 return NT_STATUS_UNSUCCESSFUL;
325 DEBUG(0, ("kerberos: %s\n",
326 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
327 return NT_STATUS_UNSUCCESSFUL;
331 static NTSTATUS gensec_fake_gssapi_krb5_client_start(struct gensec_security *gensec_security)
333 NTSTATUS nt_status = gensec_krb5_client_start(gensec_security);
335 if (NT_STATUS_IS_OK(nt_status)) {
336 struct gensec_krb5_state *gensec_krb5_state;
337 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
338 gensec_krb5_state->gssapi = true;
344 * Check if the packet is one for this mechansim
346 * @param gensec_security GENSEC state
347 * @param in The request, as a DATA_BLOB
348 * @return Error, INVALID_PARAMETER if it's not a packet for us
349 * or NT_STATUS_OK if the packet is ok.
352 static NTSTATUS gensec_fake_gssapi_krb5_magic(struct gensec_security *gensec_security,
355 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
358 return NT_STATUS_INVALID_PARAMETER;
364 * Next state function for the Krb5 GENSEC mechanism
366 * @param gensec_krb5_state KRB5 State
367 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
368 * @param in The request, as a DATA_BLOB
369 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
370 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
371 * or NT_STATUS_OK if the user is authenticated.
374 static NTSTATUS gensec_krb5_update(struct gensec_security *gensec_security,
375 TALLOC_CTX *out_mem_ctx,
376 const DATA_BLOB in, DATA_BLOB *out)
378 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
379 krb5_error_code ret = 0;
382 switch (gensec_krb5_state->state_position) {
383 case GENSEC_KRB5_CLIENT_START:
385 DATA_BLOB unwrapped_out;
387 if (gensec_krb5_state->gssapi) {
388 unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
390 /* wrap that up in a nice GSS-API wrapping */
391 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REQ);
393 *out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
395 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_MUTUAL_AUTH;
396 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
400 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH:
402 DATA_BLOB unwrapped_in;
404 krb5_ap_rep_enc_part *repl = NULL;
407 if (gensec_krb5_state->gssapi) {
408 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
409 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
410 dump_data_pw("Mutual authentication message:\n", in.data, in.length);
411 return NT_STATUS_INVALID_PARAMETER;
416 /* TODO: check the tok_id */
418 inbuf.data = unwrapped_in.data;
419 inbuf.length = unwrapped_in.length;
420 ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
421 gensec_krb5_state->auth_context,
424 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
425 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, out_mem_ctx)));
426 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf.data, inbuf.length);
427 nt_status = NT_STATUS_ACCESS_DENIED;
429 *out = data_blob(NULL, 0);
430 nt_status = NT_STATUS_OK;
431 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
434 krb5_free_ap_rep_enc_part(gensec_krb5_state->smb_krb5_context->krb5_context, repl);
439 case GENSEC_KRB5_SERVER_START:
441 DATA_BLOB unwrapped_in;
442 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
443 krb5_data inbuf, outbuf;
445 struct keytab_container *keytab;
446 krb5_principal server_in_keytab;
449 return NT_STATUS_INVALID_PARAMETER;
452 /* Grab the keytab, however generated */
453 ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security),
454 gensec_security->event_ctx,
455 gensec_security->lp_ctx, &keytab);
457 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
460 /* This ensures we lookup the correct entry in that keytab */
461 ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
462 gensec_krb5_state->smb_krb5_context,
466 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
469 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
470 if (gensec_krb5_state->gssapi
471 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
472 inbuf.data = unwrapped_in.data;
473 inbuf.length = unwrapped_in.length;
475 inbuf.data = in.data;
476 inbuf.length = in.length;
479 ret = smb_rd_req_return_stuff(gensec_krb5_state->smb_krb5_context->krb5_context,
480 &gensec_krb5_state->auth_context,
481 &inbuf, keytab->keytab, server_in_keytab,
483 &gensec_krb5_state->ticket,
484 &gensec_krb5_state->keyblock);
487 return NT_STATUS_LOGON_FAILURE;
489 unwrapped_out.data = (uint8_t *)outbuf.data;
490 unwrapped_out.length = outbuf.length;
491 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
492 /* wrap that up in a nice GSS-API wrapping */
493 if (gensec_krb5_state->gssapi) {
494 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REP);
496 *out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
498 krb5_data_free(&outbuf);
502 case GENSEC_KRB5_DONE:
504 /* Asking too many times... */
505 return NT_STATUS_INVALID_PARAMETER;
509 static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
510 DATA_BLOB *session_key)
512 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
513 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
514 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
516 krb5_error_code err = -1;
518 if (gensec_krb5_state->session_key.data) {
519 *session_key = gensec_krb5_state->session_key;
523 switch (gensec_security->gensec_role) {
525 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
528 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
531 if (err == 0 && skey != NULL) {
532 DEBUG(10, ("Got KRB5 session key of length %d\n",
533 (int)KRB5_KEY_LENGTH(skey)));
534 gensec_krb5_state->session_key = data_blob_talloc(gensec_krb5_state,
535 KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
536 *session_key = gensec_krb5_state->session_key;
537 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
539 krb5_free_keyblock(context, skey);
542 DEBUG(10, ("KRB5 error getting session key %d\n", err));
543 return NT_STATUS_NO_USER_SESSION_KEY;
547 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
548 struct auth_session_info **_session_info)
550 NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
551 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
552 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
553 struct auth_serversupplied_info *server_info = NULL;
554 struct auth_session_info *session_info = NULL;
555 struct PAC_LOGON_INFO *logon_info;
557 krb5_principal client_principal;
558 char *principal_string;
565 TALLOC_CTX *mem_ctx = talloc_new(gensec_security);
567 return NT_STATUS_NO_MEMORY;
570 ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
572 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
573 smb_get_krb5_error_message(context,
575 talloc_free(mem_ctx);
576 return NT_STATUS_NO_MEMORY;
579 ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
580 client_principal, &principal_string);
582 DEBUG(1, ("Unable to parse client principal: %s\n",
583 smb_get_krb5_error_message(context,
585 talloc_free(mem_ctx);
586 return NT_STATUS_NO_MEMORY;
589 ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
590 KRB5_AUTHDATA_WIN2K_PAC,
593 if (ret && lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
594 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
596 smb_get_krb5_error_message(context,
598 krb5_free_principal(context, client_principal);
599 free(principal_string);
600 return NT_STATUS_ACCESS_DENIED;
603 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
604 smb_get_krb5_error_message(context,
606 nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->event_ctx, gensec_security->lp_ctx, principal_string,
608 krb5_free_principal(context, client_principal);
609 free(principal_string);
611 if (!NT_STATUS_IS_OK(nt_status)) {
612 talloc_free(mem_ctx);
617 union netr_Validation validation;
618 free(principal_string);
620 pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
622 krb5_free_principal(context, client_principal);
623 talloc_free(mem_ctx);
624 return NT_STATUS_NO_MEMORY;
627 /* decode and verify the pac */
628 nt_status = kerberos_pac_logon_info(gensec_krb5_state,
629 lp_iconv_convenience(gensec_security->lp_ctx),
631 gensec_krb5_state->smb_krb5_context->krb5_context,
632 NULL, gensec_krb5_state->keyblock,
634 gensec_krb5_state->ticket->ticket.authtime, NULL);
635 krb5_free_principal(context, client_principal);
637 if (!NT_STATUS_IS_OK(nt_status)) {
638 talloc_free(mem_ctx);
642 validation.sam3 = &logon_info->info3;
643 nt_status = make_server_info_netlogon_validation(mem_ctx,
647 if (!NT_STATUS_IS_OK(nt_status)) {
648 talloc_free(mem_ctx);
653 /* references the server_info into the session_info */
654 nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx, gensec_security->lp_ctx, server_info, &session_info);
656 if (!NT_STATUS_IS_OK(nt_status)) {
657 talloc_free(mem_ctx);
661 nt_status = gensec_krb5_session_key(gensec_security, &session_info->session_key);
663 if (!NT_STATUS_IS_OK(nt_status)) {
664 talloc_free(mem_ctx);
668 *_session_info = session_info;
670 talloc_steal(gensec_krb5_state, session_info);
671 talloc_free(mem_ctx);
675 static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
680 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
681 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
682 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
684 krb5_data input, output;
685 input.length = in->length;
686 input.data = in->data;
688 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
689 ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
691 DEBUG(1, ("krb5_mk_priv failed: %s\n",
692 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
694 return NT_STATUS_ACCESS_DENIED;
696 *out = data_blob_talloc(mem_ctx, output.data, output.length);
698 krb5_data_free(&output);
700 return NT_STATUS_ACCESS_DENIED;
705 static NTSTATUS gensec_krb5_unwrap(struct gensec_security *gensec_security,
710 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
711 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
712 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
714 krb5_data input, output;
715 krb5_replay_data replay;
716 input.length = in->length;
717 input.data = in->data;
719 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
720 ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
722 DEBUG(1, ("krb5_rd_priv failed: %s\n",
723 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
725 return NT_STATUS_ACCESS_DENIED;
727 *out = data_blob_talloc(mem_ctx, output.data, output.length);
729 krb5_data_free(&output);
731 return NT_STATUS_ACCESS_DENIED;
736 static bool gensec_krb5_have_feature(struct gensec_security *gensec_security,
739 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
740 if (feature & GENSEC_FEATURE_SESSION_KEY) {
743 if (!gensec_krb5_state->gssapi &&
744 (feature & GENSEC_FEATURE_SEAL)) {
751 static const char *gensec_krb5_oids[] = {
752 GENSEC_OID_KERBEROS5,
753 GENSEC_OID_KERBEROS5_OLD,
757 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops = {
758 .name = "fake_gssapi_krb5",
759 .auth_type = DCERPC_AUTH_TYPE_KRB5,
760 .oid = gensec_krb5_oids,
761 .client_start = gensec_fake_gssapi_krb5_client_start,
762 .server_start = gensec_fake_gssapi_krb5_server_start,
763 .update = gensec_krb5_update,
764 .magic = gensec_fake_gssapi_krb5_magic,
765 .session_key = gensec_krb5_session_key,
766 .session_info = gensec_krb5_session_info,
767 .have_feature = gensec_krb5_have_feature,
770 .priority = GENSEC_KRB5
773 static const struct gensec_security_ops gensec_krb5_security_ops = {
775 .client_start = gensec_krb5_client_start,
776 .server_start = gensec_krb5_server_start,
777 .update = gensec_krb5_update,
778 .session_key = gensec_krb5_session_key,
779 .session_info = gensec_krb5_session_info,
780 .have_feature = gensec_krb5_have_feature,
781 .wrap = gensec_krb5_wrap,
782 .unwrap = gensec_krb5_unwrap,
785 .priority = GENSEC_KRB5
788 _PUBLIC_ NTSTATUS gensec_krb5_init(void)
794 ret = gensec_register(&gensec_krb5_security_ops);
795 if (!NT_STATUS_IS_OK(ret)) {
796 DEBUG(0,("Failed to register '%s' gensec backend!\n",
797 gensec_krb5_security_ops.name));
801 ret = gensec_register(&gensec_fake_gssapi_krb5_security_ops);
802 if (!NT_STATUS_IS_OK(ret)) {
803 DEBUG(0,("Failed to register '%s' gensec backend!\n",
804 gensec_krb5_security_ops.name));