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 "lib/socket/socket.h"
34 #include "librpc/rpc/dcerpc.h"
35 #include "auth/credentials/credentials.h"
36 #include "auth/credentials/credentials_krb5.h"
37 #include "auth/gensec/gensec.h"
38 #include "auth/gensec/gensec_proto.h"
39 #include "param/param.h"
40 #include "auth/session_proto.h"
41 #include "auth/auth_sam_reply.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
;
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 socket_address
*my_addr
, *peer_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
->session_key
= data_blob(NULL
, 0);
117 gensec_krb5_state
->pac
= data_blob(NULL
, 0);
118 gensec_krb5_state
->gssapi
= gssapi
;
120 talloc_set_destructor(gensec_krb5_state
, gensec_krb5_destroy
);
122 if (cli_credentials_get_krb5_context(creds
,
123 gensec_security
->event_ctx
,
124 gensec_security
->settings
->lp_ctx
, &gensec_krb5_state
->smb_krb5_context
)) {
125 talloc_free(gensec_krb5_state
);
126 return NT_STATUS_INTERNAL_ERROR
;
129 ret
= krb5_auth_con_init(gensec_krb5_state
->smb_krb5_context
->krb5_context
, &gensec_krb5_state
->auth_context
);
131 DEBUG(1,("gensec_krb5_start: krb5_auth_con_init failed (%s)\n",
132 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
133 ret
, gensec_krb5_state
)));
134 talloc_free(gensec_krb5_state
);
135 return NT_STATUS_INTERNAL_ERROR
;
138 ret
= krb5_auth_con_setflags(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
139 gensec_krb5_state
->auth_context
,
140 KRB5_AUTH_CONTEXT_DO_SEQUENCE
);
142 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setflags failed (%s)\n",
143 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
144 ret
, gensec_krb5_state
)));
145 talloc_free(gensec_krb5_state
);
146 return NT_STATUS_INTERNAL_ERROR
;
149 my_addr
= gensec_get_my_addr(gensec_security
);
150 if (my_addr
&& my_addr
->sockaddr
) {
151 ret
= krb5_sockaddr2address(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
152 my_addr
->sockaddr
, &my_krb5_addr
);
154 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
155 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
156 ret
, gensec_krb5_state
)));
157 talloc_free(gensec_krb5_state
);
158 return NT_STATUS_INTERNAL_ERROR
;
162 peer_addr
= gensec_get_peer_addr(gensec_security
);
163 if (peer_addr
&& peer_addr
->sockaddr
) {
164 ret
= krb5_sockaddr2address(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
165 peer_addr
->sockaddr
, &peer_krb5_addr
);
167 DEBUG(1,("gensec_krb5_start: krb5_sockaddr2address (local) failed (%s)\n",
168 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
169 ret
, gensec_krb5_state
)));
170 talloc_free(gensec_krb5_state
);
171 return NT_STATUS_INTERNAL_ERROR
;
175 ret
= krb5_auth_con_setaddrs(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
176 gensec_krb5_state
->auth_context
,
177 my_addr
? &my_krb5_addr
: NULL
,
178 peer_addr
? &peer_krb5_addr
: NULL
);
180 DEBUG(1,("gensec_krb5_start: krb5_auth_con_setaddrs failed (%s)\n",
181 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
182 ret
, gensec_krb5_state
)));
183 talloc_free(gensec_krb5_state
);
184 return NT_STATUS_INTERNAL_ERROR
;
190 static NTSTATUS
gensec_krb5_common_server_start(struct gensec_security
*gensec_security
, bool gssapi
)
193 struct gensec_krb5_state
*gensec_krb5_state
;
195 nt_status
= gensec_krb5_start(gensec_security
, gssapi
);
196 if (!NT_STATUS_IS_OK(nt_status
)) {
200 gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
201 gensec_krb5_state
->state_position
= GENSEC_KRB5_SERVER_START
;
206 static NTSTATUS
gensec_krb5_server_start(struct gensec_security
*gensec_security
)
208 return gensec_krb5_common_server_start(gensec_security
, false);
211 static NTSTATUS
gensec_fake_gssapi_krb5_server_start(struct gensec_security
*gensec_security
)
213 return gensec_krb5_common_server_start(gensec_security
, true);
216 static NTSTATUS
gensec_krb5_common_client_start(struct gensec_security
*gensec_security
, bool gssapi
)
218 struct gensec_krb5_state
*gensec_krb5_state
;
221 struct ccache_container
*ccache_container
;
222 const char *hostname
;
224 const char *principal
;
227 hostname
= gensec_get_target_hostname(gensec_security
);
229 DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
230 return NT_STATUS_INVALID_PARAMETER
;
232 if (is_ipaddress(hostname
)) {
233 DEBUG(2, ("Cannot do krb5 to an IP address"));
234 return NT_STATUS_INVALID_PARAMETER
;
236 if (strcmp(hostname
, "localhost") == 0) {
237 DEBUG(2, ("krb5 to 'localhost' does not make sense"));
238 return NT_STATUS_INVALID_PARAMETER
;
241 nt_status
= gensec_krb5_start(gensec_security
, gssapi
);
242 if (!NT_STATUS_IS_OK(nt_status
)) {
246 gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
247 gensec_krb5_state
->state_position
= GENSEC_KRB5_CLIENT_START
;
248 gensec_krb5_state
->ap_req_options
= AP_OPTS_USE_SUBKEY
;
250 if (gensec_krb5_state
->gssapi
) {
251 /* The Fake GSSAPI modal emulates Samba3, which does not do mutual authentication */
252 if (gensec_setting_bool(gensec_security
->settings
, "gensec_fake_gssapi_krb5", "mutual", false)) {
253 gensec_krb5_state
->ap_req_options
|= AP_OPTS_MUTUAL_REQUIRED
;
256 /* The wrapping for KPASSWD (a user of the raw KRB5 API) should be mutually authenticated */
257 if (gensec_setting_bool(gensec_security
->settings
, "gensec_krb5", "mutual", true)) {
258 gensec_krb5_state
->ap_req_options
|= AP_OPTS_MUTUAL_REQUIRED
;
262 principal
= gensec_get_target_principal(gensec_security
);
264 ret
= cli_credentials_get_ccache(gensec_get_credentials(gensec_security
),
265 gensec_security
->event_ctx
,
266 gensec_security
->settings
->lp_ctx
, &ccache_container
);
270 case KRB5KDC_ERR_PREAUTH_FAILED
:
271 return NT_STATUS_LOGON_FAILURE
;
272 case KRB5_KDC_UNREACH
:
273 DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal
));
274 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
276 DEBUG(1, ("gensec_krb5_start: Aquiring initiator credentials failed: %s\n", error_message(ret
)));
277 return NT_STATUS_UNSUCCESSFUL
;
281 if (principal
&& lp_client_use_spnego_principal(gensec_security
->settings
->lp_ctx
)) {
282 krb5_principal target_principal
;
283 ret
= krb5_parse_name(gensec_krb5_state
->smb_krb5_context
->krb5_context
, principal
,
286 ret
= krb5_mk_req_exact(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
287 &gensec_krb5_state
->auth_context
,
288 gensec_krb5_state
->ap_req_options
,
290 &in_data
, ccache_container
->ccache
,
291 &gensec_krb5_state
->enc_ticket
);
292 krb5_free_principal(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
296 ret
= krb5_mk_req(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
297 &gensec_krb5_state
->auth_context
,
298 gensec_krb5_state
->ap_req_options
,
299 gensec_get_target_service(gensec_security
),
301 &in_data
, ccache_container
->ccache
,
302 &gensec_krb5_state
->enc_ticket
);
307 case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN
:
308 DEBUG(3, ("Server [%s] is not registered with our KDC: %s\n",
309 hostname
, smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
310 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
311 case KRB5_KDC_UNREACH
:
312 DEBUG(3, ("Cannot reach a KDC we require to contact host [%s]: %s\n",
313 hostname
, smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
314 return NT_STATUS_INVALID_PARAMETER
; /* Make SPNEGO ignore us, we can't go any further here */
315 case KRB5KDC_ERR_PREAUTH_FAILED
:
316 case KRB5KRB_AP_ERR_TKT_EXPIRED
:
318 /* Too much clock skew - we will need to kinit to re-skew the clock */
319 case KRB5KRB_AP_ERR_SKEW
:
320 case KRB5_KDCREP_SKEW
:
322 DEBUG(3, ("kerberos (mk_req) failed: %s\n",
323 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
327 /* just don't print a message for these really ordinary messages */
328 case KRB5_FCC_NOFILE
:
329 case KRB5_CC_NOTFOUND
:
332 return NT_STATUS_UNSUCCESSFUL
;
336 DEBUG(0, ("kerberos: %s\n",
337 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, gensec_krb5_state
)));
338 return NT_STATUS_UNSUCCESSFUL
;
342 static NTSTATUS
gensec_krb5_client_start(struct gensec_security
*gensec_security
)
344 return gensec_krb5_common_client_start(gensec_security
, false);
347 static NTSTATUS
gensec_fake_gssapi_krb5_client_start(struct gensec_security
*gensec_security
)
349 return gensec_krb5_common_client_start(gensec_security
, true);
353 * Check if the packet is one for this mechansim
355 * @param gensec_security GENSEC state
356 * @param in The request, as a DATA_BLOB
357 * @return Error, INVALID_PARAMETER if it's not a packet for us
358 * or NT_STATUS_OK if the packet is ok.
361 static NTSTATUS
gensec_fake_gssapi_krb5_magic(struct gensec_security
*gensec_security
,
364 if (gensec_gssapi_check_oid(in
, GENSEC_OID_KERBEROS5
)) {
367 return NT_STATUS_INVALID_PARAMETER
;
373 * Next state function for the Krb5 GENSEC mechanism
375 * @param gensec_krb5_state KRB5 State
376 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
377 * @param in The request, as a DATA_BLOB
378 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
379 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
380 * or NT_STATUS_OK if the user is authenticated.
383 static NTSTATUS
gensec_krb5_update(struct gensec_security
*gensec_security
,
384 TALLOC_CTX
*out_mem_ctx
,
385 const DATA_BLOB in
, DATA_BLOB
*out
)
387 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
388 krb5_error_code ret
= 0;
391 switch (gensec_krb5_state
->state_position
) {
392 case GENSEC_KRB5_CLIENT_START
:
394 DATA_BLOB unwrapped_out
;
396 if (gensec_krb5_state
->gssapi
) {
397 unwrapped_out
= data_blob_talloc(out_mem_ctx
, gensec_krb5_state
->enc_ticket
.data
, gensec_krb5_state
->enc_ticket
.length
);
399 /* wrap that up in a nice GSS-API wrapping */
400 *out
= gensec_gssapi_gen_krb5_wrap(out_mem_ctx
, &unwrapped_out
, TOK_ID_KRB_AP_REQ
);
402 *out
= data_blob_talloc(out_mem_ctx
, gensec_krb5_state
->enc_ticket
.data
, gensec_krb5_state
->enc_ticket
.length
);
404 if (gensec_krb5_state
->ap_req_options
& AP_OPTS_MUTUAL_REQUIRED
) {
405 gensec_krb5_state
->state_position
= GENSEC_KRB5_CLIENT_MUTUAL_AUTH
;
406 nt_status
= NT_STATUS_MORE_PROCESSING_REQUIRED
;
408 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
409 nt_status
= NT_STATUS_OK
;
414 case GENSEC_KRB5_CLIENT_MUTUAL_AUTH
:
416 DATA_BLOB unwrapped_in
;
418 krb5_ap_rep_enc_part
*repl
= NULL
;
421 if (gensec_krb5_state
->gssapi
) {
422 if (!gensec_gssapi_parse_krb5_wrap(out_mem_ctx
, &in
, &unwrapped_in
, tok_id
)) {
423 DEBUG(1,("gensec_gssapi_parse_krb5_wrap(mutual authentication) failed to parse\n"));
424 dump_data_pw("Mutual authentication message:\n", in
.data
, in
.length
);
425 return NT_STATUS_INVALID_PARAMETER
;
430 /* TODO: check the tok_id */
432 inbuf
.data
= unwrapped_in
.data
;
433 inbuf
.length
= unwrapped_in
.length
;
434 ret
= krb5_rd_rep(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
435 gensec_krb5_state
->auth_context
,
438 DEBUG(1,("krb5_rd_rep (mutual authentication) failed (%s)\n",
439 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
, ret
, out_mem_ctx
)));
440 dump_data_pw("Mutual authentication message:\n", (uint8_t *)inbuf
.data
, inbuf
.length
);
441 nt_status
= NT_STATUS_ACCESS_DENIED
;
443 *out
= data_blob(NULL
, 0);
444 nt_status
= NT_STATUS_OK
;
445 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
448 krb5_free_ap_rep_enc_part(gensec_krb5_state
->smb_krb5_context
->krb5_context
, repl
);
453 case GENSEC_KRB5_SERVER_START
:
455 DATA_BLOB unwrapped_in
;
456 DATA_BLOB unwrapped_out
= data_blob(NULL
, 0);
457 krb5_data inbuf
, outbuf
;
459 struct keytab_container
*keytab
;
460 krb5_principal server_in_keytab
;
463 return NT_STATUS_INVALID_PARAMETER
;
466 /* Grab the keytab, however generated */
467 ret
= cli_credentials_get_keytab(gensec_get_credentials(gensec_security
),
468 gensec_security
->event_ctx
,
469 gensec_security
->settings
->lp_ctx
, &keytab
);
471 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
474 /* This ensures we lookup the correct entry in that keytab */
475 ret
= principal_from_credentials(out_mem_ctx
, gensec_get_credentials(gensec_security
),
476 gensec_krb5_state
->smb_krb5_context
,
480 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
483 /* Parse the GSSAPI wrapping, if it's there... (win2k3 allows it to be omited) */
484 if (gensec_krb5_state
->gssapi
485 && gensec_gssapi_parse_krb5_wrap(out_mem_ctx
, &in
, &unwrapped_in
, tok_id
)) {
486 inbuf
.data
= unwrapped_in
.data
;
487 inbuf
.length
= unwrapped_in
.length
;
489 inbuf
.data
= in
.data
;
490 inbuf
.length
= in
.length
;
493 ret
= smb_rd_req_return_stuff(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
494 &gensec_krb5_state
->auth_context
,
495 &inbuf
, keytab
->keytab
, server_in_keytab
,
497 &gensec_krb5_state
->ticket
,
498 &gensec_krb5_state
->keyblock
);
501 return NT_STATUS_LOGON_FAILURE
;
503 unwrapped_out
.data
= (uint8_t *)outbuf
.data
;
504 unwrapped_out
.length
= outbuf
.length
;
505 gensec_krb5_state
->state_position
= GENSEC_KRB5_DONE
;
506 /* wrap that up in a nice GSS-API wrapping */
507 if (gensec_krb5_state
->gssapi
) {
508 *out
= gensec_gssapi_gen_krb5_wrap(out_mem_ctx
, &unwrapped_out
, TOK_ID_KRB_AP_REP
);
510 *out
= data_blob_talloc(out_mem_ctx
, outbuf
.data
, outbuf
.length
);
512 krb5_data_free(&outbuf
);
516 case GENSEC_KRB5_DONE
:
518 /* Asking too many times... */
519 return NT_STATUS_INVALID_PARAMETER
;
523 static NTSTATUS
gensec_krb5_session_key(struct gensec_security
*gensec_security
,
524 DATA_BLOB
*session_key
)
526 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
527 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
528 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
530 krb5_error_code err
= -1;
532 if (gensec_krb5_state
->state_position
!= GENSEC_KRB5_DONE
) {
533 return NT_STATUS_NO_USER_SESSION_KEY
;
536 if (gensec_krb5_state
->session_key
.data
) {
537 *session_key
= gensec_krb5_state
->session_key
;
541 switch (gensec_security
->gensec_role
) {
543 err
= krb5_auth_con_getlocalsubkey(context
, auth_context
, &skey
);
546 err
= krb5_auth_con_getremotesubkey(context
, auth_context
, &skey
);
549 if (err
== 0 && skey
!= NULL
) {
550 DEBUG(10, ("Got KRB5 session key of length %d\n",
551 (int)KRB5_KEY_LENGTH(skey
)));
552 gensec_krb5_state
->session_key
= data_blob_talloc(gensec_krb5_state
,
553 KRB5_KEY_DATA(skey
), KRB5_KEY_LENGTH(skey
));
554 *session_key
= gensec_krb5_state
->session_key
;
555 dump_data_pw("KRB5 Session Key:\n", session_key
->data
, session_key
->length
);
557 krb5_free_keyblock(context
, skey
);
560 DEBUG(10, ("KRB5 error getting session key %d\n", err
));
561 return NT_STATUS_NO_USER_SESSION_KEY
;
565 static NTSTATUS
gensec_krb5_session_info(struct gensec_security
*gensec_security
,
566 struct auth_session_info
**_session_info
)
568 NTSTATUS nt_status
= NT_STATUS_UNSUCCESSFUL
;
569 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
570 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
571 struct auth_serversupplied_info
*server_info
= NULL
;
572 struct auth_session_info
*session_info
= NULL
;
573 struct PAC_LOGON_INFO
*logon_info
;
575 krb5_principal client_principal
;
576 char *principal_string
;
583 TALLOC_CTX
*mem_ctx
= talloc_new(gensec_security
);
585 return NT_STATUS_NO_MEMORY
;
588 ret
= krb5_ticket_get_client(context
, gensec_krb5_state
->ticket
, &client_principal
);
590 DEBUG(5, ("krb5_ticket_get_client failed to get cleint principal: %s\n",
591 smb_get_krb5_error_message(context
,
593 talloc_free(mem_ctx
);
594 return NT_STATUS_NO_MEMORY
;
597 ret
= krb5_unparse_name(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
598 client_principal
, &principal_string
);
600 DEBUG(1, ("Unable to parse client principal: %s\n",
601 smb_get_krb5_error_message(context
,
603 talloc_free(mem_ctx
);
604 return NT_STATUS_NO_MEMORY
;
607 ret
= krb5_ticket_get_authorization_data_type(context
, gensec_krb5_state
->ticket
,
608 KRB5_AUTHDATA_WIN2K_PAC
,
611 if (ret
&& gensec_setting_bool(gensec_security
->settings
, "gensec", "require_pac", false)) {
612 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s \n",
614 smb_get_krb5_error_message(context
,
616 krb5_free_principal(context
, client_principal
);
617 free(principal_string
);
618 return NT_STATUS_ACCESS_DENIED
;
621 DEBUG(5, ("krb5_ticket_get_authorization_data_type failed to find PAC: %s\n",
622 smb_get_krb5_error_message(context
,
624 if (gensec_security
->auth_context
&&
625 !gensec_setting_bool(gensec_security
->settings
, "gensec", "require_pac", false)) {
626 DEBUG(1, ("Unable to find PAC for %s, resorting to local user lookup: %s",
627 principal_string
, smb_get_krb5_error_message(context
,
629 nt_status
= gensec_security
->auth_context
->get_server_info_principal(mem_ctx
,
630 gensec_security
->auth_context
,
633 if (!NT_STATUS_IS_OK(nt_status
)) {
634 talloc_free(mem_ctx
);
638 DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access\n",
640 return NT_STATUS_ACCESS_DENIED
;
643 krb5_free_principal(context
, client_principal
);
644 free(principal_string
);
646 if (!NT_STATUS_IS_OK(nt_status
)) {
647 talloc_free(mem_ctx
);
652 union netr_Validation validation
;
653 free(principal_string
);
655 pac
= data_blob_talloc(mem_ctx
, pac_data
.data
, pac_data
.length
);
657 krb5_free_principal(context
, client_principal
);
658 talloc_free(mem_ctx
);
659 return NT_STATUS_NO_MEMORY
;
662 /* decode and verify the pac */
663 nt_status
= kerberos_pac_logon_info(gensec_krb5_state
,
664 gensec_security
->settings
->iconv_convenience
,
666 gensec_krb5_state
->smb_krb5_context
->krb5_context
,
667 NULL
, gensec_krb5_state
->keyblock
,
669 gensec_krb5_state
->ticket
->ticket
.authtime
, NULL
);
670 krb5_free_principal(context
, client_principal
);
672 if (!NT_STATUS_IS_OK(nt_status
)) {
673 talloc_free(mem_ctx
);
677 validation
.sam3
= &logon_info
->info3
;
678 nt_status
= make_server_info_netlogon_validation(mem_ctx
,
682 if (!NT_STATUS_IS_OK(nt_status
)) {
683 talloc_free(mem_ctx
);
688 /* references the server_info into the session_info */
689 nt_status
= auth_generate_session_info(mem_ctx
, gensec_security
->event_ctx
, gensec_security
->settings
->lp_ctx
, server_info
, &session_info
);
691 if (!NT_STATUS_IS_OK(nt_status
)) {
692 talloc_free(mem_ctx
);
696 nt_status
= gensec_krb5_session_key(gensec_security
, &session_info
->session_key
);
698 if (!NT_STATUS_IS_OK(nt_status
)) {
699 talloc_free(mem_ctx
);
703 *_session_info
= session_info
;
705 talloc_steal(gensec_krb5_state
, session_info
);
706 talloc_free(mem_ctx
);
710 static NTSTATUS
gensec_krb5_wrap(struct gensec_security
*gensec_security
,
715 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
716 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
717 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
719 krb5_data input
, output
;
720 input
.length
= in
->length
;
721 input
.data
= in
->data
;
723 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
724 ret
= krb5_mk_priv(context
, auth_context
, &input
, &output
, NULL
);
726 DEBUG(1, ("krb5_mk_priv failed: %s\n",
727 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
729 return NT_STATUS_ACCESS_DENIED
;
731 *out
= data_blob_talloc(mem_ctx
, output
.data
, output
.length
);
733 krb5_data_free(&output
);
735 return NT_STATUS_ACCESS_DENIED
;
740 static NTSTATUS
gensec_krb5_unwrap(struct gensec_security
*gensec_security
,
745 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
746 krb5_context context
= gensec_krb5_state
->smb_krb5_context
->krb5_context
;
747 krb5_auth_context auth_context
= gensec_krb5_state
->auth_context
;
749 krb5_data input
, output
;
750 krb5_replay_data replay
;
751 input
.length
= in
->length
;
752 input
.data
= in
->data
;
754 if (gensec_have_feature(gensec_security
, GENSEC_FEATURE_SEAL
)) {
755 ret
= krb5_rd_priv(context
, auth_context
, &input
, &output
, &replay
);
757 DEBUG(1, ("krb5_rd_priv failed: %s\n",
758 smb_get_krb5_error_message(gensec_krb5_state
->smb_krb5_context
->krb5_context
,
760 return NT_STATUS_ACCESS_DENIED
;
762 *out
= data_blob_talloc(mem_ctx
, output
.data
, output
.length
);
764 krb5_data_free(&output
);
766 return NT_STATUS_ACCESS_DENIED
;
771 static bool gensec_krb5_have_feature(struct gensec_security
*gensec_security
,
774 struct gensec_krb5_state
*gensec_krb5_state
= (struct gensec_krb5_state
*)gensec_security
->private_data
;
775 if (feature
& GENSEC_FEATURE_SESSION_KEY
) {
778 if (!gensec_krb5_state
->gssapi
&&
779 (feature
& GENSEC_FEATURE_SEAL
)) {
786 static const char *gensec_krb5_oids
[] = {
787 GENSEC_OID_KERBEROS5
,
788 GENSEC_OID_KERBEROS5_OLD
,
792 static const struct gensec_security_ops gensec_fake_gssapi_krb5_security_ops
= {
793 .name
= "fake_gssapi_krb5",
794 .auth_type
= DCERPC_AUTH_TYPE_KRB5
,
795 .oid
= gensec_krb5_oids
,
796 .client_start
= gensec_fake_gssapi_krb5_client_start
,
797 .server_start
= gensec_fake_gssapi_krb5_server_start
,
798 .update
= gensec_krb5_update
,
799 .magic
= gensec_fake_gssapi_krb5_magic
,
800 .session_key
= gensec_krb5_session_key
,
801 .session_info
= gensec_krb5_session_info
,
802 .have_feature
= gensec_krb5_have_feature
,
805 .priority
= GENSEC_KRB5
808 static const struct gensec_security_ops gensec_krb5_security_ops
= {
810 .client_start
= gensec_krb5_client_start
,
811 .server_start
= gensec_krb5_server_start
,
812 .update
= gensec_krb5_update
,
813 .session_key
= gensec_krb5_session_key
,
814 .session_info
= gensec_krb5_session_info
,
815 .have_feature
= gensec_krb5_have_feature
,
816 .wrap
= gensec_krb5_wrap
,
817 .unwrap
= gensec_krb5_unwrap
,
820 .priority
= GENSEC_KRB5
823 _PUBLIC_ NTSTATUS
gensec_krb5_init(void)
827 ret
= gensec_register(&gensec_krb5_security_ops
);
828 if (!NT_STATUS_IS_OK(ret
)) {
829 DEBUG(0,("Failed to register '%s' gensec backend!\n",
830 gensec_krb5_security_ops
.name
));
834 ret
= gensec_register(&gensec_fake_gssapi_krb5_security_ops
);
835 if (!NT_STATUS_IS_OK(ret
)) {
836 DEBUG(0,("Failed to register '%s' gensec backend!\n",
837 gensec_krb5_security_ops
.name
));