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 "auth/gensec/gensec_toplevel_proto.h"
39 #include "param/param.h"
40 #include "auth/auth_sam_reply.h"
41 #include "lib/util/util_net.h"
43 _PUBLIC_ NTSTATUS gensec_krb5_init(void);
45 enum GENSEC_KRB5_STATE {
46 GENSEC_KRB5_SERVER_START,
47 GENSEC_KRB5_CLIENT_START,
48 GENSEC_KRB5_CLIENT_MUTUAL_AUTH,
52 struct gensec_krb5_state {
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;
60 krb5_flags ap_req_options;
63 static int gensec_krb5_destroy(struct gensec_krb5_state *gensec_krb5_state)
65 if (!gensec_krb5_state->smb_krb5_context) {
66 /* We can't clean anything else up unless we started up this far */
69 if (gensec_krb5_state->enc_ticket.length) {
70 kerberos_free_data_contents(gensec_krb5_state->smb_krb5_context->krb5_context,
71 &gensec_krb5_state->enc_ticket);
74 if (gensec_krb5_state->ticket) {
75 krb5_free_ticket(gensec_krb5_state->smb_krb5_context->krb5_context,
76 gensec_krb5_state->ticket);
79 /* ccache freed in a child destructor */
81 krb5_free_keyblock(gensec_krb5_state->smb_krb5_context->krb5_context,
82 gensec_krb5_state->keyblock);
84 if (gensec_krb5_state->auth_context) {
85 krb5_auth_con_free(gensec_krb5_state->smb_krb5_context->krb5_context,
86 gensec_krb5_state->auth_context);
92 static NTSTATUS gensec_krb5_start(struct gensec_security *gensec_security, bool gssapi)
95 struct gensec_krb5_state *gensec_krb5_state;
96 struct cli_credentials *creds;
97 const struct tsocket_address *tlocal_addr, *tremote_addr;
98 krb5_address my_krb5_addr, peer_krb5_addr;
100 creds = gensec_get_credentials(gensec_security);
102 return NT_STATUS_INVALID_PARAMETER;
105 gensec_krb5_state = talloc(gensec_security, struct gensec_krb5_state);
106 if (!gensec_krb5_state) {
107 return NT_STATUS_NO_MEMORY;
110 gensec_security->private_data = gensec_krb5_state;
111 gensec_krb5_state->smb_krb5_context = NULL;
112 gensec_krb5_state->auth_context = NULL;
113 gensec_krb5_state->ticket = NULL;
114 ZERO_STRUCT(gensec_krb5_state->enc_ticket);
115 gensec_krb5_state->keyblock = NULL;
116 gensec_krb5_state->gssapi = gssapi;
118 talloc_set_destructor(gensec_krb5_state, gensec_krb5_destroy);
120 if (cli_credentials_get_krb5_context(creds,
121 gensec_security->settings->lp_ctx, &gensec_krb5_state->smb_krb5_context)) {
122 talloc_free(gensec_krb5_state);
123 return NT_STATUS_INTERNAL_ERROR;
126 ret = krb5_auth_con_init(gensec_krb5_state->smb_krb5_context->krb5_context, &gensec_krb5_state->auth_context);
128 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
129 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
130 ret, gensec_krb5_state)));
131 talloc_free(gensec_krb5_state);
132 return NT_STATUS_INTERNAL_ERROR;
135 ret = krb5_auth_con_setflags(gensec_krb5_state->smb_krb5_context->krb5_context,
136 gensec_krb5_state->auth_context,
137 KRB5_AUTH_CONTEXT_DO_SEQUENCE);
139 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
140 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
141 ret, gensec_krb5_state)));
142 talloc_free(gensec_krb5_state);
143 return NT_STATUS_INTERNAL_ERROR;
146 tlocal_addr = gensec_get_local_address(gensec_security);
149 struct sockaddr_storage ss;
151 socklen = tsocket_address_bsd_sockaddr(tlocal_addr,
152 (struct sockaddr *) &ss,
153 sizeof(struct sockaddr_storage));
155 talloc_free(gensec_krb5_state);
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 talloc_free(gensec_krb5_state);
179 return NT_STATUS_INTERNAL_ERROR;
181 ret = krb5_sockaddr2address(gensec_krb5_state->smb_krb5_context->krb5_context,
182 (const struct sockaddr *) &ss, &peer_krb5_addr);
184 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
185 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
186 ret, gensec_krb5_state)));
187 talloc_free(gensec_krb5_state);
188 return NT_STATUS_INTERNAL_ERROR;
192 ret = krb5_auth_con_setaddrs(gensec_krb5_state->smb_krb5_context->krb5_context,
193 gensec_krb5_state->auth_context,
194 tlocal_addr ? &my_krb5_addr : NULL,
195 tremote_addr ? &peer_krb5_addr : NULL);
197 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
198 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
199 ret, gensec_krb5_state)));
200 talloc_free(gensec_krb5_state);
201 return NT_STATUS_INTERNAL_ERROR;
207 static NTSTATUS gensec_krb5_common_server_start(struct gensec_security *gensec_security, bool gssapi)
210 struct gensec_krb5_state *gensec_krb5_state;
212 nt_status = gensec_krb5_start(gensec_security, gssapi);
213 if (!NT_STATUS_IS_OK(nt_status)) {
217 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
218 gensec_krb5_state->state_position = GENSEC_KRB5_SERVER_START;
223 static NTSTATUS gensec_krb5_server_start(struct gensec_security *gensec_security)
225 return gensec_krb5_common_server_start(gensec_security, false);
228 static NTSTATUS gensec_fake_gssapi_krb5_server_start(struct gensec_security *gensec_security)
230 return gensec_krb5_common_server_start(gensec_security, true);
233 static NTSTATUS gensec_krb5_common_client_start(struct gensec_security *gensec_security, bool gssapi)
235 struct gensec_krb5_state *gensec_krb5_state;
238 struct ccache_container *ccache_container;
239 const char *hostname;
240 const char *error_string;
241 const char *principal;
243 struct tevent_context *previous_ev;
245 hostname = gensec_get_target_hostname(gensec_security);
247 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
248 return NT_STATUS_INVALID_PARAMETER;
250 if (is_ipaddress(hostname)) {
251 DEBUG(2, ("Cannot do krb5 to an IP address"));
252 return NT_STATUS_INVALID_PARAMETER;
254 if (strcmp(hostname, "localhost") == 0) {
255 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
256 return NT_STATUS_INVALID_PARAMETER;
259 nt_status = gensec_krb5_start(gensec_security, gssapi);
260 if (!NT_STATUS_IS_OK(nt_status)) {
264 gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
265 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_START;
266 gensec_krb5_state->ap_req_options = AP_OPTS_USE_SUBKEY;
268 if (gensec_krb5_state->gssapi) {
269 /* The Fake GSSAPI modal emulates Samba3, which does not do mutual authentication */
270 if (gensec_setting_bool(gensec_security->settings, "gensec_fake_gssapi_krb5", "mutual", false)) {
271 gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
274 /* The wrapping for KPASSWD (a user of the raw KRB5 API) should be mutually authenticated */
275 if (gensec_setting_bool(gensec_security->settings, "gensec_krb5", "mutual", true)) {
276 gensec_krb5_state->ap_req_options |= AP_OPTS_MUTUAL_REQUIRED;
280 principal = gensec_get_target_principal(gensec_security);
282 ret = cli_credentials_get_ccache(gensec_get_credentials(gensec_security),
283 gensec_security->event_ctx,
284 gensec_security->settings->lp_ctx, &ccache_container, &error_string);
288 case KRB5KDC_ERR_PREAUTH_FAILED:
289 case KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN:
290 return NT_STATUS_LOGON_FAILURE;
291 case KRB5_KDC_UNREACH:
292 DEBUG(3, ("Cannot reach a KDC we require to contact %s: %s\n", principal, error_string));
293 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
294 case KRB5_CC_NOTFOUND:
296 DEBUG(3, ("Error preparing credentials we require to contact %s : %s\n", principal, error_string));
297 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
299 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_string));
300 return NT_STATUS_UNSUCCESSFUL;
304 /* Do this every time, in case we have weird recursive issues here */
305 ret = smb_krb5_context_set_event_ctx(gensec_krb5_state->smb_krb5_context, gensec_security->event_ctx, &previous_ev);
307 DEBUG(1, ("gensec_krb5_start: Setting event context failed\n"));
308 return NT_STATUS_NO_MEMORY;
311 krb5_principal target_principal;
312 ret = krb5_parse_name(gensec_krb5_state->smb_krb5_context->krb5_context, principal,
315 ret = krb5_mk_req_exact(gensec_krb5_state->smb_krb5_context->krb5_context,
316 &gensec_krb5_state->auth_context,
317 gensec_krb5_state->ap_req_options,
319 &in_data, ccache_container->ccache,
320 &gensec_krb5_state->enc_ticket);
321 krb5_free_principal(gensec_krb5_state->smb_krb5_context->krb5_context,
325 ret = krb5_mk_req(gensec_krb5_state->smb_krb5_context->krb5_context,
326 &gensec_krb5_state->auth_context,
327 gensec_krb5_state->ap_req_options,
328 gensec_get_target_service(gensec_security),
330 &in_data, ccache_container->ccache,
331 &gensec_krb5_state->enc_ticket);
334 smb_krb5_context_remove_event_ctx(gensec_krb5_state->smb_krb5_context, previous_ev, gensec_security->event_ctx);
339 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
340 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
341 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
342 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
343 case KRB5_KDC_UNREACH:
344 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
345 hostname, smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
346 return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
347 case KRB5KDC_ERR_PREAUTH_FAILED:
348 case KRB5KRB_AP_ERR_TKT_EXPIRED:
350 /* Too much clock skew - we will need to kinit to re-skew the clock */
351 case KRB5KRB_AP_ERR_SKEW:
352 case KRB5_KDCREP_SKEW:
354 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
355 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
359 /* just don't print a message for these really ordinary messages */
360 case KRB5_FCC_NOFILE:
361 case KRB5_CC_NOTFOUND:
364 return NT_STATUS_UNSUCCESSFUL;
368 DEBUG(0, ("kerberos: %s\n",
369 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, gensec_krb5_state)));
370 return NT_STATUS_UNSUCCESSFUL;
374 static NTSTATUS gensec_krb5_client_start(struct gensec_security *gensec_security)
376 return gensec_krb5_common_client_start(gensec_security, false);
379 static NTSTATUS gensec_fake_gssapi_krb5_client_start(struct gensec_security *gensec_security)
381 return gensec_krb5_common_client_start(gensec_security, true);
385 * Check if the packet is one for this mechansim
387 * @param gensec_security GENSEC state
388 * @param in The request, as a DATA_BLOB
389 * @return Error, INVALID_PARAMETER if it's not a packet for us
390 * or NT_STATUS_OK if the packet is ok.
393 static NTSTATUS gensec_fake_gssapi_krb5_magic(struct gensec_security *gensec_security,
396 if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
399 return NT_STATUS_INVALID_PARAMETER;
405 * Next state function for the Krb5 GENSEC mechanism
407 * @param gensec_krb5_state KRB5 State
408 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
409 * @param in The request, as a DATA_BLOB
410 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
411 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
412 * or NT_STATUS_OK if the user is authenticated.
415 static NTSTATUS gensec_krb5_update(struct gensec_security *gensec_security,
416 TALLOC_CTX *out_mem_ctx,
417 const DATA_BLOB in, DATA_BLOB *out)
419 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
420 krb5_error_code ret = 0;
423 switch (gensec_krb5_state->state_position) {
424 case GENSEC_KRB5_CLIENT_START:
426 DATA_BLOB unwrapped_out;
428 if (gensec_krb5_state->gssapi) {
429 unwrapped_out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
431 /* wrap that up in a nice GSS-API wrapping */
432 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REQ);
434 *out = data_blob_talloc(out_mem_ctx, gensec_krb5_state->enc_ticket.data, gensec_krb5_state->enc_ticket.length);
436 if (gensec_krb5_state->ap_req_options & AP_OPTS_MUTUAL_REQUIRED) {
437 gensec_krb5_state->state_position = GENSEC_KRB5_CLIENT_MUTUAL_AUTH;
438 nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
440 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
441 nt_status = NT_STATUS_OK;
446 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH:
448 DATA_BLOB unwrapped_in;
450 krb5_ap_rep_enc_part *repl = NULL;
453 if (gensec_krb5_state->gssapi) {
454 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
455 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
456 dump_data_pw("Mutual authentication message:\n", in.data, in.length);
457 return NT_STATUS_INVALID_PARAMETER;
462 /* TODO: check the tok_id */
464 inbuf.data = unwrapped_in.data;
465 inbuf.length = unwrapped_in.length;
466 ret = krb5_rd_rep(gensec_krb5_state->smb_krb5_context->krb5_context,
467 gensec_krb5_state->auth_context,
470 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
471 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context, ret, out_mem_ctx)));
472 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf.data, inbuf.length);
473 nt_status = NT_STATUS_ACCESS_DENIED;
475 *out = data_blob(NULL, 0);
476 nt_status = NT_STATUS_OK;
477 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
480 krb5_free_ap_rep_enc_part(gensec_krb5_state->smb_krb5_context->krb5_context, repl);
485 case GENSEC_KRB5_SERVER_START:
487 DATA_BLOB unwrapped_in;
488 DATA_BLOB unwrapped_out = data_blob(NULL, 0);
489 krb5_data inbuf, outbuf;
491 struct keytab_container *keytab;
492 krb5_principal server_in_keytab;
493 const char *error_string;
494 enum credentials_obtained obtained;
497 return NT_STATUS_INVALID_PARAMETER;
500 /* Grab the keytab, however generated */
501 ret = cli_credentials_get_keytab(gensec_get_credentials(gensec_security),
502 gensec_security->settings->lp_ctx, &keytab);
504 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
507 /* This ensures we lookup the correct entry in that keytab */
508 ret = principal_from_credentials(out_mem_ctx, gensec_get_credentials(gensec_security),
509 gensec_krb5_state->smb_krb5_context,
510 &server_in_keytab, &obtained, &error_string);
513 DEBUG(2,("Failed to make credentials from principal: %s\n", error_string));
514 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
517 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
518 if (gensec_krb5_state->gssapi
519 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx, &in, &unwrapped_in, tok_id)) {
520 inbuf.data = unwrapped_in.data;
521 inbuf.length = unwrapped_in.length;
523 inbuf.data = in.data;
524 inbuf.length = in.length;
527 ret = smb_rd_req_return_stuff(gensec_krb5_state->smb_krb5_context->krb5_context,
528 &gensec_krb5_state->auth_context,
529 &inbuf, keytab->keytab, server_in_keytab,
531 &gensec_krb5_state->ticket,
532 &gensec_krb5_state->keyblock);
535 return NT_STATUS_LOGON_FAILURE;
537 unwrapped_out.data = (uint8_t *)outbuf.data;
538 unwrapped_out.length = outbuf.length;
539 gensec_krb5_state->state_position = GENSEC_KRB5_DONE;
540 /* wrap that up in a nice GSS-API wrapping */
541 if (gensec_krb5_state->gssapi) {
542 *out = gensec_gssapi_gen_krb5_wrap(out_mem_ctx, &unwrapped_out, TOK_ID_KRB_AP_REP);
544 *out = data_blob_talloc(out_mem_ctx, outbuf.data, outbuf.length);
546 krb5_data_free(&outbuf);
550 case GENSEC_KRB5_DONE:
552 /* Asking too many times... */
553 return NT_STATUS_INVALID_PARAMETER;
557 static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
559 DATA_BLOB *session_key)
561 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
562 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
563 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
565 krb5_error_code err = -1;
567 if (gensec_krb5_state->state_position != GENSEC_KRB5_DONE) {
568 return NT_STATUS_NO_USER_SESSION_KEY;
571 switch (gensec_security->gensec_role) {
573 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
576 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
579 if (err == 0 && skey != NULL) {
580 DEBUG(10, ("Got KRB5 session key of length %d\n",
581 (int)KRB5_KEY_LENGTH(skey)));
582 *session_key = data_blob_talloc(mem_ctx,
583 KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
584 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
586 krb5_free_keyblock(context, skey);
589 DEBUG(10, ("KRB5 error getting session key %d\n", err));
590 return NT_STATUS_NO_USER_SESSION_KEY;
594 static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
595 TALLOC_CTX *mem_ctx_out,
596 struct auth_session_info **_session_info)
598 NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
599 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
600 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
601 struct auth_user_info_dc *user_info_dc = NULL;
602 struct auth_session_info *session_info = NULL;
603 struct PAC_LOGON_INFO *logon_info;
605 krb5_principal client_principal;
606 char *principal_string;
613 TALLOC_CTX *mem_ctx = talloc_new(mem_ctx_out);
615 return NT_STATUS_NO_MEMORY;
618 ret = krb5_ticket_get_client(context, gensec_krb5_state->ticket, &client_principal);
620 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
621 smb_get_krb5_error_message(context,
623 talloc_free(mem_ctx);
624 return NT_STATUS_NO_MEMORY;
627 ret = krb5_unparse_name(gensec_krb5_state->smb_krb5_context->krb5_context,
628 client_principal, &principal_string);
630 DEBUG(1, ("Unable to parse client principal: %s\n",
631 smb_get_krb5_error_message(context,
633 krb5_free_principal(context, client_principal);
634 talloc_free(mem_ctx);
635 return NT_STATUS_NO_MEMORY;
638 ret = krb5_ticket_get_authorization_data_type(context, gensec_krb5_state->ticket,
639 KRB5_AUTHDATA_WIN2K_PAC,
642 if (ret && gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
643 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
645 smb_get_krb5_error_message(context,
647 free(principal_string);
648 krb5_free_principal(context, client_principal);
649 talloc_free(mem_ctx);
650 return NT_STATUS_ACCESS_DENIED;
653 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
654 smb_get_krb5_error_message(context,
656 if (gensec_security->auth_context &&
657 !gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
658 DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup: %s",
659 principal_string, smb_get_krb5_error_message(context,
661 nt_status = gensec_security->auth_context->get_user_info_dc_principal(mem_ctx,
662 gensec_security->auth_context,
664 NULL, &user_info_dc);
665 if (!NT_STATUS_IS_OK(nt_status)) {
666 free(principal_string);
667 krb5_free_principal(context, client_principal);
668 talloc_free(mem_ctx);
672 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
674 free(principal_string);
675 krb5_free_principal(context, client_principal);
676 talloc_free(mem_ctx);
677 return NT_STATUS_ACCESS_DENIED;
681 union netr_Validation validation;
683 pac = data_blob_talloc(mem_ctx, pac_data.data, pac_data.length);
685 free(principal_string);
686 krb5_free_principal(context, client_principal);
687 talloc_free(mem_ctx);
688 return NT_STATUS_NO_MEMORY;
691 /* decode and verify the pac */
692 nt_status = kerberos_pac_logon_info(gensec_krb5_state,
694 gensec_krb5_state->smb_krb5_context->krb5_context,
695 NULL, gensec_krb5_state->keyblock,
697 gensec_krb5_state->ticket->ticket.authtime, &logon_info);
699 if (!NT_STATUS_IS_OK(nt_status)) {
700 free(principal_string);
701 krb5_free_principal(context, client_principal);
702 talloc_free(mem_ctx);
706 validation.sam3 = &logon_info->info3;
707 nt_status = make_user_info_dc_netlogon_validation(mem_ctx,
710 true, /* This user was authenticated */
712 if (!NT_STATUS_IS_OK(nt_status)) {
713 free(principal_string);
714 krb5_free_principal(context, client_principal);
715 talloc_free(mem_ctx);
720 free(principal_string);
721 krb5_free_principal(context, client_principal);
723 /* references the user_info_dc into the session_info */
724 nt_status = gensec_generate_session_info(mem_ctx, gensec_security, user_info_dc, &session_info);
726 if (!NT_STATUS_IS_OK(nt_status)) {
727 talloc_free(mem_ctx);
731 nt_status = gensec_krb5_session_key(gensec_security, session_info, &session_info->session_key);
733 if (!NT_STATUS_IS_OK(nt_status)) {
734 talloc_free(mem_ctx);
738 *_session_info = talloc_steal(mem_ctx_out, session_info);
740 talloc_free(mem_ctx);
744 static NTSTATUS gensec_krb5_wrap(struct gensec_security *gensec_security,
749 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
750 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
751 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
753 krb5_data input, output;
754 input.length = in->length;
755 input.data = in->data;
757 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
758 ret = krb5_mk_priv(context, auth_context, &input, &output, NULL);
760 DEBUG(1, ("krb5_mk_priv failed: %s\n",
761 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
763 return NT_STATUS_ACCESS_DENIED;
765 *out = data_blob_talloc(mem_ctx, output.data, output.length);
767 krb5_data_free(&output);
769 return NT_STATUS_ACCESS_DENIED;
774 static NTSTATUS gensec_krb5_unwrap(struct gensec_security *gensec_security,
779 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
780 krb5_context context = gensec_krb5_state->smb_krb5_context->krb5_context;
781 krb5_auth_context auth_context = gensec_krb5_state->auth_context;
783 krb5_data input, output;
784 krb5_replay_data replay;
785 input.length = in->length;
786 input.data = in->data;
788 if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
789 ret = krb5_rd_priv(context, auth_context, &input, &output, &replay);
791 DEBUG(1, ("krb5_rd_priv failed: %s\n",
792 smb_get_krb5_error_message(gensec_krb5_state->smb_krb5_context->krb5_context,
794 return NT_STATUS_ACCESS_DENIED;
796 *out = data_blob_talloc(mem_ctx, output.data, output.length);
798 krb5_data_free(&output);
800 return NT_STATUS_ACCESS_DENIED;
805 static bool gensec_krb5_have_feature(struct gensec_security *gensec_security,
808 struct gensec_krb5_state *gensec_krb5_state = (struct gensec_krb5_state *)gensec_security->private_data;
809 if (feature & GENSEC_FEATURE_SESSION_KEY) {
812 if (!gensec_krb5_state->gssapi &&
813 (feature & GENSEC_FEATURE_SEAL)) {
820 static const char *gensec_krb5_oids[] = {
821 GENSEC_OID_KERBEROS5,
822 GENSEC_OID_KERBEROS5_OLD,
826 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops = {
827 .name = "fake_gssapi_krb5",
828 .auth_type = DCERPC_AUTH_TYPE_KRB5,
829 .oid = gensec_krb5_oids,
830 .client_start = gensec_fake_gssapi_krb5_client_start,
831 .server_start = gensec_fake_gssapi_krb5_server_start,
832 .update = gensec_krb5_update,
833 .magic = gensec_fake_gssapi_krb5_magic,
834 .session_key = gensec_krb5_session_key,
835 .session_info = gensec_krb5_session_info,
836 .have_feature = gensec_krb5_have_feature,
839 .priority = GENSEC_KRB5
842 static const struct gensec_security_ops gensec_krb5_security_ops = {
844 .client_start = gensec_krb5_client_start,
845 .server_start = gensec_krb5_server_start,
846 .update = gensec_krb5_update,
847 .session_key = gensec_krb5_session_key,
848 .session_info = gensec_krb5_session_info,
849 .have_feature = gensec_krb5_have_feature,
850 .wrap = gensec_krb5_wrap,
851 .unwrap = gensec_krb5_unwrap,
854 .priority = GENSEC_KRB5
857 _PUBLIC_ NTSTATUS gensec_krb5_init(void)
861 ret = gensec_register(&gensec_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));
868 ret = gensec_register(&gensec_fake_gssapi_krb5_security_ops);
869 if (!NT_STATUS_IS_OK(ret)) {
870 DEBUG(0,("Failed to register '%s' gensec backend!\n",
871 gensec_krb5_security_ops.name));