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/gensec/gensec.h"
35 #include "auth/gensec/gensec_proto.h"
36 #include "param/param.h"
37 #include "auth/auth_sam_reply.h"
39 enum GENSEC_KRB5_STATE
{
40 GENSEC_KRB5_SERVER_START
,
41 GENSEC_KRB5_CLIENT_START
,
42 GENSEC_KRB5_CLIENT_MUTUAL_AUTH
,
46 struct gensec_krb5_state
{
47 DATA_BLOB session_key
;
49 enum GENSEC_KRB5_STATE state_position
;
50 struct smb_krb5_context
*smb_krb5_context
;
51 krb5_auth_context auth_context
;
53 krb5_keyblock
*keyblock
;
56 krb5_flags ap_req_options
;
59 static int gensec_krb5_destroy(struct gensec_krb5_state
*gensec_krb5_state
)
61 if (!gensec_krb5_state
->smb_krb5_context
) {
62 /* We can't clean anything else up unless we started up this far */
65 if (gensec_krb5_state
->enc_ticket
.length
) {
66 kerberos_free_data_contents(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
67 &gensec_krb5_state
->enc_ticket
);
70 if (gensec_krb5_state
->ticket
) {
71 krb5_free_ticket(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
72 gensec_krb5_state
->ticket
);
75 /* ccache freed in a child destructor */
77 krb5_free_keyblock(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
78 gensec_krb5_state
->keyblock
);
80 if (gensec_krb5_state
->auth_context
) {
81 krb5_auth_con_free(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
82 gensec_krb5_state
->auth_context
);
88 static NTSTATUS
gensec_krb5_start(struct gensec_security
*gensec_security
, bool gssapi
)
91 struct gensec_krb5_state
*gensec_krb5_state
;
92 struct cli_credentials
*creds
;
93 const struct socket_address
*peer_addr
;
94 const struct tsocket_address
*tlocal_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
= gssapi
;
117 talloc_set_destructor(gensec_krb5_state
, gensec_krb5_destroy
);
119 if (cli_credentials_get_krb5_context(creds
,
120 gensec_security
->event_ctx
,
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 return NT_STATUS_INTERNAL_ERROR
;
157 ret
= krb5_sockaddr2address(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
158 (const struct sockaddr
*) &ss
, &my_krb5_addr
);
160 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
161 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
162 ret
, gensec_krb5_state
)));
163 talloc_free(gensec_krb5_state
);
164 return NT_STATUS_INTERNAL_ERROR
;
168 peer_addr
= gensec_get_peer_addr(gensec_security
);
169 if (peer_addr
&& peer_addr
->sockaddr
) {
170 ret
= krb5_sockaddr2address(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
171 peer_addr
->sockaddr
, &peer_krb5_addr
);
173 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
174 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
175 ret
, gensec_krb5_state
)));
176 talloc_free(gensec_krb5_state
);
177 return NT_STATUS_INTERNAL_ERROR
;
181 ret
= krb5_auth_con_setaddrs(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
182 gensec_krb5_state
->auth_context
,
183 tlocal_addr
? &my_krb5_addr
: NULL
,
184 peer_addr
? &peer_krb5_addr
: NULL
);
186 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
187 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
188 ret
, gensec_krb5_state
)));
189 talloc_free(gensec_krb5_state
);
190 return NT_STATUS_INTERNAL_ERROR
;
196 static NTSTATUS
gensec_krb5_common_server_start(struct gensec_security
*gensec_security
, bool gssapi
)
199 struct gensec_krb5_state
*gensec_krb5_state
;
201 nt_status
= gensec_krb5_start(gensec_security
, gssapi
);
202 if (!NT_STATUS_IS_OK(nt_status
)) {
206 gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
207 gensec_krb5_state
->state_position
= GENSEC_KRB5_SERVER_START
;
212 static NTSTATUS
gensec_krb5_server_start(struct gensec_security
*gensec_security
)
214 return gensec_krb5_common_server_start(gensec_security
, false);
217 static NTSTATUS
gensec_fake_gssapi_krb5_server_start(struct gensec_security
*gensec_security
)
219 return gensec_krb5_common_server_start(gensec_security
, true);
222 static NTSTATUS
gensec_krb5_common_client_start(struct gensec_security
*gensec_security
, bool gssapi
)
224 struct gensec_krb5_state
*gensec_krb5_state
;
227 struct ccache_container
*ccache_container
;
228 const char *hostname
;
230 const char *principal
;
233 hostname
= gensec_get_target_hostname(gensec_security
);
235 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
236 return NT_STATUS_INVALID_PARAMETER
;
238 if (is_ipaddress(hostname
)) {
239 DEBUG(2, ("Cannot do krb5 to an IP address"));
240 return NT_STATUS_INVALID_PARAMETER
;
242 if (strcmp(hostname
, "localhost") == 0) {
243 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
244 return NT_STATUS_INVALID_PARAMETER
;
247 nt_status
= gensec_krb5_start(gensec_security
, gssapi
);
248 if (!NT_STATUS_IS_OK(nt_status
)) {
252 gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
253 gensec_krb5_state
->state_position
= GENSEC_KRB5_CLIENT_START
;
254 gensec_krb5_state
->ap_req_options
= AP_OPTS_USE_SUBKEY
;
256 if (gensec_krb5_state
->gssapi
) {
257 /* The Fake GSSAPI modal emulates Samba3, which does not do mutual authentication */
258 if (gensec_setting_bool(gensec_security
->settings
, "gensec_fake_gssapi_krb5", "mutual", false)) {
259 gensec_krb5_state
->ap_req_options
|= AP_OPTS_MUTUAL_REQUIRED
;
262 /* The wrapping for KPASSWD (a user of the raw KRB5 API) should be mutually authenticated */
263 if (gensec_setting_bool(gensec_security
->settings
, "gensec_krb5", "mutual", true)) {
264 gensec_krb5_state
->ap_req_options
|= AP_OPTS_MUTUAL_REQUIRED
;
268 principal
= gensec_get_target_principal(gensec_security
);
270 ret
= cli_credentials_get_ccache(gensec_get_credentials(gensec_security
),
271 gensec_security
->event_ctx
,
272 gensec_security
->settings
->lp_ctx
, &ccache_container
);
276 case KRB5KDC_ERR_PREAUTH_FAILED
:
277 return NT_STATUS_LOGON_FAILURE
;
278 case KRB5_KDC_UNREACH
:
279 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal
));
280 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
282 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_message(ret
)));
283 return NT_STATUS_UNSUCCESSFUL
;
287 if (principal
&& lp_client_use_spnego_principal(gensec_security
->settings
->lp_ctx
)) {
288 krb5_principal target_principal
;
289 ret
= krb5_parse_name(gensec_krb5_state
->smb_krb5_context
->krb5_context
, principal
,
292 ret
= krb5_mk_req_exact(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
293 &gensec_krb5_state
->auth_context
,
294 gensec_krb5_state
->ap_req_options
,
296 &in_data
, ccache_container
->ccache
,
297 &gensec_krb5_state
->enc_ticket
);
298 krb5_free_principal(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
302 ret
= krb5_mk_req(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
303 &gensec_krb5_state
->auth_context
,
304 gensec_krb5_state
->ap_req_options
,
305 gensec_get_target_service(gensec_security
),
307 &in_data
, ccache_container
->ccache
,
308 &gensec_krb5_state
->enc_ticket
);
313 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN
:
314 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
315 hostname
, smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
316 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
317 case KRB5_KDC_UNREACH
:
318 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
319 hostname
, smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
320 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
321 case KRB5KDC_ERR_PREAUTH_FAILED
:
322 case KRB5KRB_AP_ERR_TKT_EXPIRED
:
324 /* Too much clock skew - we will need to kinit to re-skew the clock */
325 case KRB5KRB_AP_ERR_SKEW
:
326 case KRB5_KDCREP_SKEW
:
328 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
329 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
333 /* just don't print a message for these really ordinary messages */
334 case KRB5_FCC_NOFILE
:
335 case KRB5_CC_NOTFOUND
:
338 return NT_STATUS_UNSUCCESSFUL
;
342 DEBUG(0, ("kerberos: %s\n",
343 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
344 return NT_STATUS_UNSUCCESSFUL
;
348 static NTSTATUS
gensec_krb5_client_start(struct gensec_security
*gensec_security
)
350 return gensec_krb5_common_client_start(gensec_security
, false);
353 static NTSTATUS
gensec_fake_gssapi_krb5_client_start(struct gensec_security
*gensec_security
)
355 return gensec_krb5_common_client_start(gensec_security
, true);
359 * Check if the packet is one for this mechansim
361 * @param gensec_security GENSEC state
362 * @param in The request, as a DATA_BLOB
363 * @return Error, INVALID_PARAMETER if it's not a packet for us
364 * or NT_STATUS_OK if the packet is ok.
367 static NTSTATUS
gensec_fake_gssapi_krb5_magic(struct gensec_security
*gensec_security
,
370 if (gensec_gssapi_check_oid(in
, GENSEC_OID_KERBEROS5
)) {
373 return NT_STATUS_INVALID_PARAMETER
;
379 * Next state function for the Krb5 GENSEC mechanism
381 * @param gensec_krb5_state KRB5 State
382 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
383 * @param in The request, as a DATA_BLOB
384 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
385 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
386 * or NT_STATUS_OK if the user is authenticated.
389 static NTSTATUS
gensec_krb5_update(struct gensec_security
*gensec_security
,
390 TALLOC_CTX
*out_mem_ctx
,
391 const DATA_BLOB in
, DATA_BLOB
*out
)
393 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
394 krb5_error_code ret
= 0;
397 switch (gensec_krb5_state
->state_position
) {
398 case GENSEC_KRB5_CLIENT_START
:
400 DATA_BLOB unwrapped_out
;
402 if (gensec_krb5_state
->gssapi
) {
403 unwrapped_out
= data_blob_talloc(out_mem_ctx
, gensec_krb5_state
->enc_ticket
.data
, gensec_krb5_state
->enc_ticket
.length
);
405 /* wrap that up in a nice GSS-API wrapping */
406 *out
= gensec_gssapi_gen_krb5_wrap(out_mem_ctx
, &unwrapped_out
, TOK_ID_KRB_AP_REQ
);
408 *out
= data_blob_talloc(out_mem_ctx
, gensec_krb5_state
->enc_ticket
.data
, gensec_krb5_state
->enc_ticket
.length
);
410 if (gensec_krb5_state
->ap_req_options
& AP_OPTS_MUTUAL_REQUIRED
) {
411 gensec_krb5_state
->state_position
= GENSEC_KRB5_CLIENT_MUTUAL_AUTH
;
412 nt_status
= NT_STATUS_MORE_PROCESSING_REQUIRED
;
414 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
415 nt_status
= NT_STATUS_OK
;
420 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH
:
422 DATA_BLOB unwrapped_in
;
424 krb5_ap_rep_enc_part
*repl
= NULL
;
427 if (gensec_krb5_state
->gssapi
) {
428 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx
, &in
, &unwrapped_in
, tok_id
)) {
429 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
430 dump_data_pw("Mutual authentication message:\n", in
.data
, in
.length
);
431 return NT_STATUS_INVALID_PARAMETER
;
436 /* TODO: check the tok_id */
438 inbuf
.data
= unwrapped_in
.data
;
439 inbuf
.length
= unwrapped_in
.length
;
440 ret
= krb5_rd_rep(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
441 gensec_krb5_state
->auth_context
,
444 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
445 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, out_mem_ctx
)));
446 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf
.data
, inbuf
.length
);
447 nt_status
= NT_STATUS_ACCESS_DENIED
;
449 *out
= data_blob(NULL
, 0);
450 nt_status
= NT_STATUS_OK
;
451 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
454 krb5_free_ap_rep_enc_part(gensec_krb5_state
->smb_krb5_context
->krb5_context
, repl
);
459 case GENSEC_KRB5_SERVER_START
:
461 DATA_BLOB unwrapped_in
;
462 DATA_BLOB unwrapped_out
= data_blob(NULL
, 0);
463 krb5_data inbuf
, outbuf
;
465 struct keytab_container
*keytab
;
466 krb5_principal server_in_keytab
;
469 return NT_STATUS_INVALID_PARAMETER
;
472 /* Grab the keytab, however generated */
473 ret
= cli_credentials_get_keytab(gensec_get_credentials(gensec_security
),
474 gensec_security
->event_ctx
,
475 gensec_security
->settings
->lp_ctx
, &keytab
);
477 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
480 /* This ensures we lookup the correct entry in that keytab */
481 ret
= principal_from_credentials(out_mem_ctx
, gensec_get_credentials(gensec_security
),
482 gensec_krb5_state
->smb_krb5_context
,
486 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
489 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
490 if (gensec_krb5_state
->gssapi
491 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx
, &in
, &unwrapped_in
, tok_id
)) {
492 inbuf
.data
= unwrapped_in
.data
;
493 inbuf
.length
= unwrapped_in
.length
;
495 inbuf
.data
= in
.data
;
496 inbuf
.length
= in
.length
;
499 ret
= smb_rd_req_return_stuff(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
500 &gensec_krb5_state
->auth_context
,
501 &inbuf
, keytab
->keytab
, server_in_keytab
,
503 &gensec_krb5_state
->ticket
,
504 &gensec_krb5_state
->keyblock
);
507 return NT_STATUS_LOGON_FAILURE
;
509 unwrapped_out
.data
= (uint8_t *)outbuf
.data
;
510 unwrapped_out
.length
= outbuf
.length
;
511 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
512 /* wrap that up in a nice GSS-API wrapping */
513 if (gensec_krb5_state
->gssapi
) {
514 *out
= gensec_gssapi_gen_krb5_wrap(out_mem_ctx
, &unwrapped_out
, TOK_ID_KRB_AP_REP
);
516 *out
= data_blob_talloc(out_mem_ctx
, outbuf
.data
, outbuf
.length
);
518 krb5_data_free(&outbuf
);
522 case GENSEC_KRB5_DONE
:
524 /* Asking too many times... */
525 return NT_STATUS_INVALID_PARAMETER
;
529 static NTSTATUS
gensec_krb5_session_key(struct gensec_security
*gensec_security
,
530 DATA_BLOB
*session_key
)
532 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
533 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
534 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
536 krb5_error_code err
= -1;
538 if (gensec_krb5_state
->state_position
!= GENSEC_KRB5_DONE
) {
539 return NT_STATUS_NO_USER_SESSION_KEY
;
542 if (gensec_krb5_state
->session_key
.data
) {
543 *session_key
= gensec_krb5_state
->session_key
;
547 switch (gensec_security
->gensec_role
) {
549 err
= krb5_auth_con_getlocalsubkey(context
, auth_context
, &skey
);
552 err
= krb5_auth_con_getremotesubkey(context
, auth_context
, &skey
);
555 if (err
== 0 && skey
!= NULL
) {
556 DEBUG(10, ("Got KRB5 session key of length %d\n",
557 (int)KRB5_KEY_LENGTH(skey
)));
558 gensec_krb5_state
->session_key
= data_blob_talloc(gensec_krb5_state
,
559 KRB5_KEY_DATA(skey
), KRB5_KEY_LENGTH(skey
));
560 *session_key
= gensec_krb5_state
->session_key
;
561 dump_data_pw("KRB5 Session Key:\n", session_key
->data
, session_key
->length
);
563 krb5_free_keyblock(context
, skey
);
566 DEBUG(10, ("KRB5 error getting session key %d\n", err
));
567 return NT_STATUS_NO_USER_SESSION_KEY
;
571 static NTSTATUS
gensec_krb5_session_info(struct gensec_security
*gensec_security
,
572 struct auth_session_info
**_session_info
)
574 NTSTATUS nt_status
= NT_STATUS_UNSUCCESSFUL
;
575 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
576 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
577 struct auth_serversupplied_info
*server_info
= NULL
;
578 struct auth_session_info
*session_info
= NULL
;
579 struct PAC_LOGON_INFO
*logon_info
;
581 krb5_principal client_principal
;
582 char *principal_string
;
589 TALLOC_CTX
*mem_ctx
= talloc_new(gensec_security
);
591 return NT_STATUS_NO_MEMORY
;
594 ret
= krb5_ticket_get_client(context
, gensec_krb5_state
->ticket
, &client_principal
);
596 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
597 smb_get_krb5_error_message(context
,
599 talloc_free(mem_ctx
);
600 return NT_STATUS_NO_MEMORY
;
603 ret
= krb5_unparse_name(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
604 client_principal
, &principal_string
);
606 DEBUG(1, ("Unable to parse client principal: %s\n",
607 smb_get_krb5_error_message(context
,
609 talloc_free(mem_ctx
);
610 return NT_STATUS_NO_MEMORY
;
613 ret
= krb5_ticket_get_authorization_data_type(context
, gensec_krb5_state
->ticket
,
614 KRB5_AUTHDATA_WIN2K_PAC
,
617 if (ret
&& gensec_setting_bool(gensec_security
->settings
, "gensec", "require_pac", false)) {
618 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
620 smb_get_krb5_error_message(context
,
622 krb5_free_principal(context
, client_principal
);
623 free(principal_string
);
624 return NT_STATUS_ACCESS_DENIED
;
627 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
628 smb_get_krb5_error_message(context
,
630 if (gensec_security
->auth_context
&&
631 !gensec_setting_bool(gensec_security
->settings
, "gensec", "require_pac", false)) {
632 DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup: %s",
633 principal_string
, smb_get_krb5_error_message(context
,
635 nt_status
= gensec_security
->auth_context
->get_server_info_principal(mem_ctx
,
636 gensec_security
->auth_context
,
639 if (!NT_STATUS_IS_OK(nt_status
)) {
640 talloc_free(mem_ctx
);
644 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
646 return NT_STATUS_ACCESS_DENIED
;
649 krb5_free_principal(context
, client_principal
);
650 free(principal_string
);
652 if (!NT_STATUS_IS_OK(nt_status
)) {
653 talloc_free(mem_ctx
);
658 union netr_Validation validation
;
659 free(principal_string
);
661 pac
= data_blob_talloc(mem_ctx
, pac_data
.data
, pac_data
.length
);
663 krb5_free_principal(context
, client_principal
);
664 talloc_free(mem_ctx
);
665 return NT_STATUS_NO_MEMORY
;
668 /* decode and verify the pac */
669 nt_status
= kerberos_pac_logon_info(gensec_krb5_state
,
670 gensec_security
->settings
->iconv_convenience
,
672 gensec_krb5_state
->smb_krb5_context
->krb5_context
,
673 NULL
, gensec_krb5_state
->keyblock
,
675 gensec_krb5_state
->ticket
->ticket
.authtime
, NULL
);
676 krb5_free_principal(context
, client_principal
);
678 if (!NT_STATUS_IS_OK(nt_status
)) {
679 talloc_free(mem_ctx
);
683 validation
.sam3
= &logon_info
->info3
;
684 nt_status
= make_server_info_netlogon_validation(mem_ctx
,
688 if (!NT_STATUS_IS_OK(nt_status
)) {
689 talloc_free(mem_ctx
);
694 /* references the server_info into the session_info */
695 nt_status
= auth_generate_session_info(mem_ctx
, gensec_security
->event_ctx
, gensec_security
->settings
->lp_ctx
, server_info
, &session_info
);
697 if (!NT_STATUS_IS_OK(nt_status
)) {
698 talloc_free(mem_ctx
);
702 nt_status
= gensec_krb5_session_key(gensec_security
, &session_info
->session_key
);
704 if (!NT_STATUS_IS_OK(nt_status
)) {
705 talloc_free(mem_ctx
);
709 *_session_info
= session_info
;
711 talloc_steal(gensec_krb5_state
, session_info
);
712 talloc_free(mem_ctx
);
716 static NTSTATUS
gensec_krb5_wrap(struct gensec_security
*gensec_security
,
721 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
722 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
723 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
725 krb5_data input
, output
;
726 input
.length
= in
->length
;
727 input
.data
= in
->data
;
729 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
730 ret
= krb5_mk_priv(context
, auth_context
, &input
, &output
, NULL
);
732 DEBUG(1, ("krb5_mk_priv failed: %s\n",
733 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
735 return NT_STATUS_ACCESS_DENIED
;
737 *out
= data_blob_talloc(mem_ctx
, output
.data
, output
.length
);
739 krb5_data_free(&output
);
741 return NT_STATUS_ACCESS_DENIED
;
746 static NTSTATUS
gensec_krb5_unwrap(struct gensec_security
*gensec_security
,
751 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
752 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
753 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
755 krb5_data input
, output
;
756 krb5_replay_data replay
;
757 input
.length
= in
->length
;
758 input
.data
= in
->data
;
760 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
761 ret
= krb5_rd_priv(context
, auth_context
, &input
, &output
, &replay
);
763 DEBUG(1, ("krb5_rd_priv failed: %s\n",
764 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
766 return NT_STATUS_ACCESS_DENIED
;
768 *out
= data_blob_talloc(mem_ctx
, output
.data
, output
.length
);
770 krb5_data_free(&output
);
772 return NT_STATUS_ACCESS_DENIED
;
777 static bool gensec_krb5_have_feature(struct gensec_security
*gensec_security
,
780 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
781 if (feature
& GENSEC_FEATURE_SESSION_KEY
) {
784 if (!gensec_krb5_state
->gssapi
&&
785 (feature
& GENSEC_FEATURE_SEAL
)) {
792 static const char *gensec_krb5_oids
[] = {
793 GENSEC_OID_KERBEROS5
,
794 GENSEC_OID_KERBEROS5_OLD
,
798 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops
= {
799 .name
= "fake_gssapi_krb5",
800 .auth_type
= DCERPC_AUTH_TYPE_KRB5
,
801 .oid
= gensec_krb5_oids
,
802 .client_start
= gensec_fake_gssapi_krb5_client_start
,
803 .server_start
= gensec_fake_gssapi_krb5_server_start
,
804 .update
= gensec_krb5_update
,
805 .magic
= gensec_fake_gssapi_krb5_magic
,
806 .session_key
= gensec_krb5_session_key
,
807 .session_info
= gensec_krb5_session_info
,
808 .have_feature
= gensec_krb5_have_feature
,
811 .priority
= GENSEC_KRB5
814 static const struct gensec_security_ops gensec_krb5_security_ops
= {
816 .client_start
= gensec_krb5_client_start
,
817 .server_start
= gensec_krb5_server_start
,
818 .update
= gensec_krb5_update
,
819 .session_key
= gensec_krb5_session_key
,
820 .session_info
= gensec_krb5_session_info
,
821 .have_feature
= gensec_krb5_have_feature
,
822 .wrap
= gensec_krb5_wrap
,
823 .unwrap
= gensec_krb5_unwrap
,
826 .priority
= GENSEC_KRB5
829 _PUBLIC_ NTSTATUS
gensec_krb5_init(void)
833 ret
= gensec_register(&gensec_krb5_security_ops
);
834 if (!NT_STATUS_IS_OK(ret
)) {
835 DEBUG(0,("Failed to register '%s' gensec backend!\n",
836 gensec_krb5_security_ops
.name
));
840 ret
= gensec_register(&gensec_fake_gssapi_krb5_security_ops
);
841 if (!NT_STATUS_IS_OK(ret
)) {
842 DEBUG(0,("Failed to register '%s' gensec backend!\n",
843 gensec_krb5_security_ops
.name
));