2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2001
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 static ADS_STATUS
ads_sasl_ntlmssp_wrap(ADS_STRUCT
*ads
, uint8
*buf
, uint32 len
)
26 struct ntlmssp_state
*ntlmssp_state
=
27 (struct ntlmssp_state
*)ads
->ldap
.wrap_private_data
;
31 uint8
*dptr
= ads
->ldap
.out
.buf
+ (4 + NTLMSSP_SIG_SIZE
);
33 /* copy the data to the right location */
34 memcpy(dptr
, buf
, len
);
36 /* create the signature and may encrypt the data */
37 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_SEAL
) {
38 nt_status
= ntlmssp_seal_packet(ntlmssp_state
,
43 nt_status
= ntlmssp_sign_packet(ntlmssp_state
,
48 status
= ADS_ERROR_NT(nt_status
);
49 if (!ADS_ERR_OK(status
)) return status
;
51 /* copy the signature to the right location */
52 memcpy(ads
->ldap
.out
.buf
+ 4,
53 sig
.data
, NTLMSSP_SIG_SIZE
);
57 /* set how many bytes must be written to the underlying socket */
58 ads
->ldap
.out
.left
= 4 + NTLMSSP_SIG_SIZE
+ len
;
63 static ADS_STATUS
ads_sasl_ntlmssp_unwrap(ADS_STRUCT
*ads
)
65 struct ntlmssp_state
*ntlmssp_state
=
66 (struct ntlmssp_state
*)ads
->ldap
.wrap_private_data
;
70 uint8
*dptr
= ads
->ldap
.in
.buf
+ (4 + NTLMSSP_SIG_SIZE
);
71 uint32 dlen
= ads
->ldap
.in
.ofs
- (4 + NTLMSSP_SIG_SIZE
);
73 /* wrap the signature into a DATA_BLOB */
74 sig
= data_blob_const(ads
->ldap
.in
.buf
+ 4, NTLMSSP_SIG_SIZE
);
76 /* verify the signature and maybe decrypt the data */
77 if (ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_SEAL
) {
78 nt_status
= ntlmssp_unseal_packet(ntlmssp_state
,
83 nt_status
= ntlmssp_check_packet(ntlmssp_state
,
88 status
= ADS_ERROR_NT(nt_status
);
89 if (!ADS_ERR_OK(status
)) return status
;
91 /* set the amount of bytes for the upper layer and set the ofs to the data */
92 ads
->ldap
.in
.left
= dlen
;
93 ads
->ldap
.in
.ofs
= 4 + NTLMSSP_SIG_SIZE
;
98 static void ads_sasl_ntlmssp_disconnect(ADS_STRUCT
*ads
)
100 struct ntlmssp_state
*ntlmssp_state
=
101 (struct ntlmssp_state
*)ads
->ldap
.wrap_private_data
;
103 ntlmssp_end(&ntlmssp_state
);
105 ads
->ldap
.wrap_ops
= NULL
;
106 ads
->ldap
.wrap_private_data
= NULL
;
109 static const struct ads_saslwrap_ops ads_sasl_ntlmssp_ops
= {
111 .wrap
= ads_sasl_ntlmssp_wrap
,
112 .unwrap
= ads_sasl_ntlmssp_unwrap
,
113 .disconnect
= ads_sasl_ntlmssp_disconnect
117 perform a LDAP/SASL/SPNEGO/NTLMSSP bind (just how many layers can
118 we fit on one socket??)
120 static ADS_STATUS
ads_sasl_spnego_ntlmssp_bind(ADS_STRUCT
*ads
)
122 DATA_BLOB msg1
= data_blob_null
;
123 DATA_BLOB blob
= data_blob_null
;
124 DATA_BLOB blob_in
= data_blob_null
;
125 DATA_BLOB blob_out
= data_blob_null
;
126 struct berval cred
, *scred
= NULL
;
133 struct ntlmssp_state
*ntlmssp_state
;
135 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_client_start(&ntlmssp_state
))) {
136 return ADS_ERROR_NT(nt_status
);
138 ntlmssp_state
->neg_flags
&= ~NTLMSSP_NEGOTIATE_SIGN
;
140 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_set_username(ntlmssp_state
, ads
->auth
.user_name
))) {
141 return ADS_ERROR_NT(nt_status
);
143 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_set_domain(ntlmssp_state
, ads
->auth
.realm
))) {
144 return ADS_ERROR_NT(nt_status
);
146 if (!NT_STATUS_IS_OK(nt_status
= ntlmssp_set_password(ntlmssp_state
, ads
->auth
.password
))) {
147 return ADS_ERROR_NT(nt_status
);
150 switch (ads
->ldap
.wrap_type
) {
151 case ADS_SASLWRAP_TYPE_SEAL
:
152 features
= NTLMSSP_FEATURE_SIGN
| NTLMSSP_FEATURE_SEAL
;
154 case ADS_SASLWRAP_TYPE_SIGN
:
155 if (ads
->auth
.flags
& ADS_AUTH_SASL_FORCE
) {
156 features
= NTLMSSP_FEATURE_SIGN
;
159 * windows servers are broken with sign only,
160 * so we need to use seal here too
162 features
= NTLMSSP_FEATURE_SIGN
| NTLMSSP_FEATURE_SEAL
;
163 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_SEAL
;
166 case ADS_SASLWRAP_TYPE_PLAIN
:
170 ntlmssp_want_feature(ntlmssp_state
, features
);
172 blob_in
= data_blob_null
;
175 nt_status
= ntlmssp_update(ntlmssp_state
,
177 data_blob_free(&blob_in
);
178 if ((NT_STATUS_EQUAL(nt_status
, NT_STATUS_MORE_PROCESSING_REQUIRED
)
179 || NT_STATUS_IS_OK(nt_status
))
180 && blob_out
.length
) {
182 /* and wrap it in a SPNEGO wrapper */
183 msg1
= gen_negTokenInit(OID_NTLMSSP
, blob_out
);
185 /* wrap it in SPNEGO */
186 msg1
= spnego_gen_auth(blob_out
);
189 data_blob_free(&blob_out
);
191 cred
.bv_val
= (char *)msg1
.data
;
192 cred
.bv_len
= msg1
.length
;
194 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSS-SPNEGO", &cred
, NULL
, NULL
, &scred
);
195 data_blob_free(&msg1
);
196 if ((rc
!= LDAP_SASL_BIND_IN_PROGRESS
) && (rc
!= 0)) {
201 ntlmssp_end(&ntlmssp_state
);
202 return ADS_ERROR(rc
);
205 blob
= data_blob(scred
->bv_val
, scred
->bv_len
);
208 blob
= data_blob_null
;
213 ntlmssp_end(&ntlmssp_state
);
214 data_blob_free(&blob_out
);
215 return ADS_ERROR_NT(nt_status
);
219 (rc
== LDAP_SASL_BIND_IN_PROGRESS
)) {
220 DATA_BLOB tmp_blob
= data_blob_null
;
221 /* the server might give us back two challenges */
222 if (!spnego_parse_challenge(blob
, &blob_in
,
225 ntlmssp_end(&ntlmssp_state
);
226 data_blob_free(&blob
);
227 DEBUG(3,("Failed to parse challenges\n"));
228 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER
);
230 data_blob_free(&tmp_blob
);
231 } else if (rc
== LDAP_SASL_BIND_IN_PROGRESS
) {
232 if (!spnego_parse_auth_response(blob
, nt_status
, OID_NTLMSSP
,
235 ntlmssp_end(&ntlmssp_state
);
236 data_blob_free(&blob
);
237 DEBUG(3,("Failed to parse auth response\n"));
238 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER
);
241 data_blob_free(&blob
);
242 data_blob_free(&blob_out
);
244 } while (rc
== LDAP_SASL_BIND_IN_PROGRESS
&& !NT_STATUS_IS_OK(nt_status
));
246 /* we have a reference conter on ntlmssp_state, if we are signing
247 then the state will be kept by the signing engine */
249 if (ads
->ldap
.wrap_type
> ADS_SASLWRAP_TYPE_PLAIN
) {
250 ads
->ldap
.out
.max_unwrapped
= ADS_SASL_WRAPPING_OUT_MAX_WRAPPED
- NTLMSSP_SIG_SIZE
;
251 ads
->ldap
.out
.sig_size
= NTLMSSP_SIG_SIZE
;
252 ads
->ldap
.in
.min_wrapped
= ads
->ldap
.out
.sig_size
;
253 ads
->ldap
.in
.max_wrapped
= ADS_SASL_WRAPPING_IN_MAX_WRAPPED
;
254 status
= ads_setup_sasl_wrapping(ads
, &ads_sasl_ntlmssp_ops
, ntlmssp_state
);
255 if (!ADS_ERR_OK(status
)) {
256 DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
257 ads_errstr(status
)));
258 ntlmssp_end(&ntlmssp_state
);
262 ntlmssp_end(&ntlmssp_state
);
265 return ADS_ERROR(rc
);
269 static ADS_STATUS
ads_sasl_gssapi_wrap(ADS_STRUCT
*ads
, uint8
*buf
, uint32 len
)
271 gss_ctx_id_t context_handle
= (gss_ctx_id_t
)ads
->ldap
.wrap_private_data
;
275 gss_buffer_desc unwrapped
, wrapped
;
276 int conf_req_flag
, conf_state
;
278 unwrapped
.value
= buf
;
279 unwrapped
.length
= len
;
281 /* for now request sign and seal */
282 conf_req_flag
= (ads
->ldap
.wrap_type
== ADS_SASLWRAP_TYPE_SEAL
);
284 gss_rc
= gss_wrap(&minor_status
, context_handle
,
285 conf_req_flag
, GSS_C_QOP_DEFAULT
,
286 &unwrapped
, &conf_state
,
288 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
289 if (!ADS_ERR_OK(status
)) return status
;
291 if (conf_req_flag
&& conf_state
== 0) {
292 return ADS_ERROR_NT(NT_STATUS_ACCESS_DENIED
);
295 if ((ads
->ldap
.out
.size
- 4) < wrapped
.length
) {
296 return ADS_ERROR_NT(NT_STATUS_INTERNAL_ERROR
);
299 /* copy the wrapped blob to the right location */
300 memcpy(ads
->ldap
.out
.buf
+ 4, wrapped
.value
, wrapped
.length
);
302 /* set how many bytes must be written to the underlying socket */
303 ads
->ldap
.out
.left
= 4 + wrapped
.length
;
305 gss_release_buffer(&minor_status
, &wrapped
);
310 static ADS_STATUS
ads_sasl_gssapi_unwrap(ADS_STRUCT
*ads
)
312 gss_ctx_id_t context_handle
= (gss_ctx_id_t
)ads
->ldap
.wrap_private_data
;
316 gss_buffer_desc unwrapped
, wrapped
;
319 wrapped
.value
= ads
->ldap
.in
.buf
+ 4;
320 wrapped
.length
= ads
->ldap
.in
.ofs
- 4;
322 gss_rc
= gss_unwrap(&minor_status
, context_handle
,
323 &wrapped
, &unwrapped
,
324 &conf_state
, GSS_C_QOP_DEFAULT
);
325 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
326 if (!ADS_ERR_OK(status
)) return status
;
328 if (ads
->ldap
.wrap_type
== ADS_SASLWRAP_TYPE_SEAL
&& conf_state
== 0) {
329 return ADS_ERROR_NT(NT_STATUS_ACCESS_DENIED
);
332 if (wrapped
.length
< unwrapped
.length
) {
333 return ADS_ERROR_NT(NT_STATUS_INTERNAL_ERROR
);
336 /* copy the wrapped blob to the right location */
337 memcpy(ads
->ldap
.in
.buf
+ 4, unwrapped
.value
, unwrapped
.length
);
339 /* set how many bytes must be written to the underlying socket */
340 ads
->ldap
.in
.left
= unwrapped
.length
;
341 ads
->ldap
.in
.ofs
= 4;
343 gss_release_buffer(&minor_status
, &unwrapped
);
348 static void ads_sasl_gssapi_disconnect(ADS_STRUCT
*ads
)
350 gss_ctx_id_t context_handle
= (gss_ctx_id_t
)ads
->ldap
.wrap_private_data
;
353 gss_delete_sec_context(&minor_status
, &context_handle
, GSS_C_NO_BUFFER
);
355 ads
->ldap
.wrap_ops
= NULL
;
356 ads
->ldap
.wrap_private_data
= NULL
;
359 static const struct ads_saslwrap_ops ads_sasl_gssapi_ops
= {
361 .wrap
= ads_sasl_gssapi_wrap
,
362 .unwrap
= ads_sasl_gssapi_unwrap
,
363 .disconnect
= ads_sasl_gssapi_disconnect
367 perform a LDAP/SASL/SPNEGO/GSSKRB5 bind
369 static ADS_STATUS
ads_sasl_spnego_gsskrb5_bind(ADS_STRUCT
*ads
, const gss_name_t serv_name
)
375 gss_OID_desc krb5_mech_type
=
376 {9, CONST_DISCARD(char *, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02") };
377 gss_OID mech_type
= &krb5_mech_type
;
378 gss_OID actual_mech_type
= GSS_C_NULL_OID
;
379 const char *spnego_mechs
[] = {OID_KERBEROS5_OLD
, OID_KERBEROS5
, OID_NTLMSSP
, NULL
};
380 gss_ctx_id_t context_handle
= GSS_C_NO_CONTEXT
;
381 gss_buffer_desc input_token
, output_token
;
382 uint32 req_flags
, ret_flags
;
383 uint32 req_tmp
, ret_tmp
;
386 struct berval cred
, *scred
= NULL
;
388 input_token
.value
= NULL
;
389 input_token
.length
= 0;
391 req_flags
= GSS_C_MUTUAL_FLAG
| GSS_C_REPLAY_FLAG
;
392 switch (ads
->ldap
.wrap_type
) {
393 case ADS_SASLWRAP_TYPE_SEAL
:
394 req_flags
|= GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
;
396 case ADS_SASLWRAP_TYPE_SIGN
:
397 req_flags
|= GSS_C_INTEG_FLAG
;
399 case ADS_SASLWRAP_TYPE_PLAIN
:
403 /* Note: here we explicit ask for the krb5 mech_type */
404 gss_rc
= gss_init_sec_context(&minor_status
,
417 if (gss_rc
&& gss_rc
!= GSS_S_CONTINUE_NEEDED
) {
418 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
423 * As some gssapi krb5 mech implementations
424 * automaticly add GSS_C_INTEG_FLAG and GSS_C_CONF_FLAG
425 * to req_flags internaly, it's not possible to
426 * use plain or signing only connection via
427 * the gssapi interface.
429 * Because of this we need to check it the ret_flags
430 * has more flags as req_flags and correct the value
431 * of ads->ldap.wrap_type.
433 * I ads->auth.flags has ADS_AUTH_SASL_FORCE
434 * we need to give an error.
436 req_tmp
= req_flags
& (GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
);
437 ret_tmp
= ret_flags
& (GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
);
439 if (req_tmp
== ret_tmp
) {
440 /* everythings fine... */
442 } else if (req_flags
& GSS_C_CONF_FLAG
) {
444 * here we wanted sealing but didn't got it
445 * from the gssapi library
447 status
= ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
450 } else if ((req_flags
& GSS_C_INTEG_FLAG
) &&
451 !(ret_flags
& GSS_C_INTEG_FLAG
)) {
453 * here we wanted siging but didn't got it
454 * from the gssapi library
456 status
= ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
459 } else if (ret_flags
& GSS_C_CONF_FLAG
) {
461 * here we didn't want sealing
462 * but the gssapi library forces it
463 * so correct the needed wrap_type if
464 * the caller didn't forced siging only
466 if (ads
->auth
.flags
& ADS_AUTH_SASL_FORCE
) {
467 status
= ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
471 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_SEAL
;
472 req_flags
= ret_flags
;
474 } else if (ret_flags
& GSS_C_INTEG_FLAG
) {
476 * here we didn't want signing
477 * but the gssapi library forces it
478 * so correct the needed wrap_type if
479 * the caller didn't forced plain
481 if (ads
->auth
.flags
& ADS_AUTH_SASL_FORCE
) {
482 status
= ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
486 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_SIGN
;
487 req_flags
= ret_flags
;
490 * This could (should?) not happen
492 status
= ADS_ERROR_NT(NT_STATUS_INTERNAL_ERROR
);
497 /* and wrap that in a shiny SPNEGO wrapper */
498 unwrapped
= data_blob_const(output_token
.value
, output_token
.length
);
499 wrapped
= gen_negTokenTarg(spnego_mechs
, unwrapped
);
500 gss_release_buffer(&minor_status
, &output_token
);
501 if (unwrapped
.length
> wrapped
.length
) {
502 status
= ADS_ERROR_NT(NT_STATUS_NO_MEMORY
);
506 cred
.bv_val
= (char *)wrapped
.data
;
507 cred
.bv_len
= wrapped
.length
;
509 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSS-SPNEGO", &cred
, NULL
, NULL
,
511 data_blob_free(&wrapped
);
512 if (rc
!= LDAP_SUCCESS
) {
513 status
= ADS_ERROR(rc
);
518 wrapped
= data_blob_const(scred
->bv_val
, scred
->bv_len
);
520 wrapped
= data_blob_null
;
523 ok
= spnego_parse_auth_response(wrapped
, NT_STATUS_OK
,
526 if (scred
) ber_bvfree(scred
);
528 status
= ADS_ERROR_NT(NT_STATUS_INVALID_NETWORK_RESPONSE
);
532 input_token
.value
= unwrapped
.data
;
533 input_token
.length
= unwrapped
.length
;
536 * As we asked for mutal authentication
537 * we need to pass the servers response
540 gss_rc
= gss_init_sec_context(&minor_status
,
553 data_blob_free(&unwrapped
);
555 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
559 gss_release_buffer(&minor_status
, &output_token
);
562 * If we the sign and seal options
563 * doesn't match after getting the response
564 * from the server, we don't want to use the connection
566 req_tmp
= req_flags
& (GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
);
567 ret_tmp
= ret_flags
& (GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
);
569 if (req_tmp
!= ret_tmp
) {
570 /* everythings fine... */
571 status
= ADS_ERROR_NT(NT_STATUS_INVALID_NETWORK_RESPONSE
);
575 if (ads
->ldap
.wrap_type
> ADS_SASLWRAP_TYPE_PLAIN
) {
576 uint32 max_msg_size
= ADS_SASL_WRAPPING_OUT_MAX_WRAPPED
;
578 gss_rc
= gss_wrap_size_limit(&minor_status
, context_handle
,
579 (ads
->ldap
.wrap_type
== ADS_SASLWRAP_TYPE_SEAL
),
581 max_msg_size
, &ads
->ldap
.out
.max_unwrapped
);
583 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
587 ads
->ldap
.out
.sig_size
= max_msg_size
- ads
->ldap
.out
.max_unwrapped
;
588 ads
->ldap
.in
.min_wrapped
= 0x2C; /* taken from a capture with LDAP unbind */
589 ads
->ldap
.in
.max_wrapped
= max_msg_size
;
590 status
= ads_setup_sasl_wrapping(ads
, &ads_sasl_gssapi_ops
, context_handle
);
591 if (!ADS_ERR_OK(status
)) {
592 DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
593 ads_errstr(status
)));
596 /* make sure we don't free context_handle */
597 context_handle
= GSS_C_NO_CONTEXT
;
601 if (context_handle
!= GSS_C_NO_CONTEXT
)
602 gss_delete_sec_context(&minor_status
, &context_handle
, GSS_C_NO_BUFFER
);
606 #endif /* HAVE_GSSAPI */
609 struct ads_service_principal
{
616 static void ads_free_service_principal(struct ads_service_principal
*p
)
618 SAFE_FREE(p
->string
);
623 gss_release_name(&minor_status
, &p
->name
);
629 static ADS_STATUS
ads_generate_service_principal(ADS_STRUCT
*ads
,
630 const char *given_principal
,
631 struct ads_service_principal
*p
)
635 gss_buffer_desc input_name
;
636 /* GSS_KRB5_NT_PRINCIPAL_NAME */
637 gss_OID_desc nt_principal
=
638 {10, CONST_DISCARD(char *, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x01")};
645 /* I've seen a child Windows 2000 domain not send
646 the principal name back in the first round of
647 the SASL bind reply. So we guess based on server
648 name and realm. --jerry */
649 /* Also try best guess when we get the w2k8 ignore
650 principal back - gd */
652 if (!given_principal
||
653 strequal(given_principal
, ADS_IGNORE_PRINCIPAL
)) {
655 status
= ads_guess_service_principal(ads
, &p
->string
);
656 if (!ADS_ERR_OK(status
)) {
660 p
->string
= SMB_STRDUP(given_principal
);
662 return ADS_ERROR(LDAP_NO_MEMORY
);
667 input_name
.value
= p
->string
;
668 input_name
.length
= strlen(p
->string
);
670 gss_rc
= gss_import_name(&minor_status
, &input_name
, &nt_principal
, &p
->name
);
672 ads_free_service_principal(p
);
673 return ADS_ERROR_GSS(gss_rc
, minor_status
);
681 perform a LDAP/SASL/SPNEGO/KRB5 bind
683 static ADS_STATUS
ads_sasl_spnego_rawkrb5_bind(ADS_STRUCT
*ads
, const char *principal
)
685 DATA_BLOB blob
= data_blob_null
;
686 struct berval cred
, *scred
= NULL
;
687 DATA_BLOB session_key
= data_blob_null
;
690 if (ads
->ldap
.wrap_type
> ADS_SASLWRAP_TYPE_PLAIN
) {
691 return ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
694 rc
= spnego_gen_negTokenTarg(principal
, ads
->auth
.time_offset
, &blob
, &session_key
, 0,
695 &ads
->auth
.tgs_expire
);
698 return ADS_ERROR_KRB5(rc
);
701 /* now send the auth packet and we should be done */
702 cred
.bv_val
= (char *)blob
.data
;
703 cred
.bv_len
= blob
.length
;
705 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSS-SPNEGO", &cred
, NULL
, NULL
, &scred
);
707 data_blob_free(&blob
);
708 data_blob_free(&session_key
);
712 return ADS_ERROR(rc
);
715 static ADS_STATUS
ads_sasl_spnego_krb5_bind(ADS_STRUCT
*ads
,
716 struct ads_service_principal
*p
)
720 * we only use the gsskrb5 based implementation
721 * when sasl sign or seal is requested.
723 * This has the following reasons:
724 * - it's likely that the gssapi krb5 mech implementation
725 * doesn't support to negotiate plain connections
726 * - the ads_sasl_spnego_rawkrb5_bind is more robust
727 * against clock skew errors
729 if (ads
->ldap
.wrap_type
> ADS_SASLWRAP_TYPE_PLAIN
) {
730 return ads_sasl_spnego_gsskrb5_bind(ads
, p
->name
);
733 return ads_sasl_spnego_rawkrb5_bind(ads
, p
->string
);
735 #endif /* HAVE_KRB5 */
738 this performs a SASL/SPNEGO bind
740 static ADS_STATUS
ads_sasl_spnego_bind(ADS_STRUCT
*ads
)
742 struct berval
*scred
=NULL
;
746 char *given_principal
= NULL
;
747 char *OIDs
[ASN1_MAX_OIDS
];
749 bool got_kerberos_mechanism
= False
;
752 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSS-SPNEGO", NULL
, NULL
, NULL
, &scred
);
754 if (rc
!= LDAP_SASL_BIND_IN_PROGRESS
) {
755 status
= ADS_ERROR(rc
);
759 blob
= data_blob(scred
->bv_val
, scred
->bv_len
);
764 file_save("sasl_spnego.dat", blob
.data
, blob
.length
);
767 /* the server sent us the first part of the SPNEGO exchange in the negprot
769 if (!spnego_parse_negTokenInit(blob
, OIDs
, &given_principal
)) {
770 data_blob_free(&blob
);
771 status
= ADS_ERROR(LDAP_OPERATIONS_ERROR
);
774 data_blob_free(&blob
);
776 /* make sure the server understands kerberos */
777 for (i
=0;OIDs
[i
];i
++) {
778 DEBUG(3,("ads_sasl_spnego_bind: got OID=%s\n", OIDs
[i
]));
780 if (strcmp(OIDs
[i
], OID_KERBEROS5_OLD
) == 0 ||
781 strcmp(OIDs
[i
], OID_KERBEROS5
) == 0) {
782 got_kerberos_mechanism
= True
;
787 DEBUG(3,("ads_sasl_spnego_bind: got server principal name = %s\n", given_principal
));
790 if (!(ads
->auth
.flags
& ADS_AUTH_DISABLE_KERBEROS
) &&
791 got_kerberos_mechanism
)
793 struct ads_service_principal p
;
795 status
= ads_generate_service_principal(ads
, given_principal
, &p
);
796 SAFE_FREE(given_principal
);
797 if (!ADS_ERR_OK(status
)) {
801 status
= ads_sasl_spnego_krb5_bind(ads
, &p
);
802 if (ADS_ERR_OK(status
)) {
803 ads_free_service_principal(&p
);
807 DEBUG(10,("ads_sasl_spnego_krb5_bind failed with: %s, "
808 "calling kinit\n", ads_errstr(status
)));
810 status
= ADS_ERROR_KRB5(ads_kinit_password(ads
));
812 if (ADS_ERR_OK(status
)) {
813 status
= ads_sasl_spnego_krb5_bind(ads
, &p
);
814 if (!ADS_ERR_OK(status
)) {
815 DEBUG(0,("kinit succeeded but "
816 "ads_sasl_spnego_krb5_bind failed: %s\n",
817 ads_errstr(status
)));
821 ads_free_service_principal(&p
);
823 /* only fallback to NTLMSSP if allowed */
824 if (ADS_ERR_OK(status
) ||
825 !(ads
->auth
.flags
& ADS_AUTH_ALLOW_NTLMSSP
)) {
831 SAFE_FREE(given_principal
);
834 /* lets do NTLMSSP ... this has the big advantage that we don't need
835 to sync clocks, and we don't rely on special versions of the krb5
836 library for HMAC_MD4 encryption */
837 return ads_sasl_spnego_ntlmssp_bind(ads
);
844 #define MAX_GSS_PASSES 3
846 /* this performs a SASL/gssapi bind
847 we avoid using cyrus-sasl to make Samba more robust. cyrus-sasl
848 is very dependent on correctly configured DNS whereas
849 this routine is much less fragile
850 see RFC2078 and RFC2222 for details
852 static ADS_STATUS
ads_sasl_gssapi_do_bind(ADS_STRUCT
*ads
, const gss_name_t serv_name
)
855 gss_ctx_id_t context_handle
= GSS_C_NO_CONTEXT
;
856 gss_OID mech_type
= GSS_C_NULL_OID
;
857 gss_buffer_desc output_token
, input_token
;
858 uint32 req_flags
, ret_flags
;
861 struct berval
*scred
= NULL
;
865 uint32 max_msg_size
= ADS_SASL_WRAPPING_OUT_MAX_WRAPPED
;
866 uint8 wrap_type
= ADS_SASLWRAP_TYPE_PLAIN
;
869 input_token
.value
= NULL
;
870 input_token
.length
= 0;
873 * Note: here we always ask the gssapi for sign and seal
874 * as this is negotiated later after the mutal
877 req_flags
= GSS_C_MUTUAL_FLAG
| GSS_C_REPLAY_FLAG
| GSS_C_INTEG_FLAG
| GSS_C_CONF_FLAG
;
879 for (i
=0; i
< MAX_GSS_PASSES
; i
++) {
880 gss_rc
= gss_init_sec_context(&minor_status
,
897 if (gss_rc
&& gss_rc
!= GSS_S_CONTINUE_NEEDED
) {
898 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
902 cred
.bv_val
= (char *)output_token
.value
;
903 cred
.bv_len
= output_token
.length
;
905 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSSAPI", &cred
, NULL
, NULL
,
907 if (rc
!= LDAP_SASL_BIND_IN_PROGRESS
) {
908 status
= ADS_ERROR(rc
);
912 if (output_token
.value
) {
913 gss_release_buffer(&minor_status
, &output_token
);
917 input_token
.value
= scred
->bv_val
;
918 input_token
.length
= scred
->bv_len
;
920 input_token
.value
= NULL
;
921 input_token
.length
= 0;
924 if (gss_rc
== 0) break;
927 gss_rc
= gss_unwrap(&minor_status
,context_handle
,&input_token
,&output_token
,
934 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
938 p
= (uint8
*)output_token
.value
;
941 file_save("sasl_gssapi.dat", output_token
.value
, output_token
.length
);
945 wrap_type
= CVAL(p
,0);
947 max_msg_size
= RIVAL(p
,0);
950 gss_release_buffer(&minor_status
, &output_token
);
952 if (!(wrap_type
& ads
->ldap
.wrap_type
)) {
954 * the server doesn't supports the wrap
957 DEBUG(0,("The ldap sasl wrap type doesn't match wanted[%d] server[%d]\n",
958 ads
->ldap
.wrap_type
, wrap_type
));
959 DEBUGADD(0,("You may want to set the 'client ldap sasl wrapping' option\n"));
960 status
= ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED
);
964 /* 0x58 is the minimum windows accepts */
965 if (max_msg_size
< 0x58) {
969 output_token
.length
= 4;
970 output_token
.value
= SMB_MALLOC(output_token
.length
);
971 p
= (uint8
*)output_token
.value
;
973 RSIVAL(p
,0,max_msg_size
);
974 SCVAL(p
,0,ads
->ldap
.wrap_type
);
977 * we used to add sprintf("dn:%s", ads->config.bind_path) here.
978 * but using ads->config.bind_path is the wrong! It should be
979 * the DN of the user object!
981 * w2k3 gives an error when we send an incorrect DN, but sending nothing
982 * is ok and matches the information flow used in GSS-SPNEGO.
985 gss_rc
= gss_wrap(&minor_status
, context_handle
,0,GSS_C_QOP_DEFAULT
,
986 &output_token
, &conf_state
,
989 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
993 free(output_token
.value
);
995 cred
.bv_val
= (char *)input_token
.value
;
996 cred
.bv_len
= input_token
.length
;
998 rc
= ldap_sasl_bind_s(ads
->ldap
.ld
, NULL
, "GSSAPI", &cred
, NULL
, NULL
,
1000 gss_release_buffer(&minor_status
, &input_token
);
1001 status
= ADS_ERROR(rc
);
1002 if (!ADS_ERR_OK(status
)) {
1006 if (ads
->ldap
.wrap_type
> ADS_SASLWRAP_TYPE_PLAIN
) {
1007 gss_rc
= gss_wrap_size_limit(&minor_status
, context_handle
,
1008 (ads
->ldap
.wrap_type
== ADS_SASLWRAP_TYPE_SEAL
),
1010 max_msg_size
, &ads
->ldap
.out
.max_unwrapped
);
1012 status
= ADS_ERROR_GSS(gss_rc
, minor_status
);
1016 ads
->ldap
.out
.sig_size
= max_msg_size
- ads
->ldap
.out
.max_unwrapped
;
1017 ads
->ldap
.in
.min_wrapped
= 0x2C; /* taken from a capture with LDAP unbind */
1018 ads
->ldap
.in
.max_wrapped
= max_msg_size
;
1019 status
= ads_setup_sasl_wrapping(ads
, &ads_sasl_gssapi_ops
, context_handle
);
1020 if (!ADS_ERR_OK(status
)) {
1021 DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
1022 ads_errstr(status
)));
1025 /* make sure we don't free context_handle */
1026 context_handle
= GSS_C_NO_CONTEXT
;
1031 if (context_handle
!= GSS_C_NO_CONTEXT
)
1032 gss_delete_sec_context(&minor_status
, &context_handle
, GSS_C_NO_BUFFER
);
1039 static ADS_STATUS
ads_sasl_gssapi_bind(ADS_STRUCT
*ads
)
1042 struct ads_service_principal p
;
1044 status
= ads_generate_service_principal(ads
, NULL
, &p
);
1045 if (!ADS_ERR_OK(status
)) {
1049 status
= ads_sasl_gssapi_do_bind(ads
, p
.name
);
1050 if (ADS_ERR_OK(status
)) {
1051 ads_free_service_principal(&p
);
1055 DEBUG(10,("ads_sasl_gssapi_do_bind failed with: %s, "
1056 "calling kinit\n", ads_errstr(status
)));
1058 status
= ADS_ERROR_KRB5(ads_kinit_password(ads
));
1060 if (ADS_ERR_OK(status
)) {
1061 status
= ads_sasl_gssapi_do_bind(ads
, p
.name
);
1064 ads_free_service_principal(&p
);
1069 #endif /* HAVE_GSSAPI */
1071 /* mapping between SASL mechanisms and functions */
1074 ADS_STATUS (*fn
)(ADS_STRUCT
*);
1075 } sasl_mechanisms
[] = {
1076 {"GSS-SPNEGO", ads_sasl_spnego_bind
},
1078 {"GSSAPI", ads_sasl_gssapi_bind
}, /* doesn't work with .NET RC1. No idea why */
1083 ADS_STATUS
ads_sasl_bind(ADS_STRUCT
*ads
)
1085 const char *attrs
[] = {"supportedSASLMechanisms", NULL
};
1091 /* get a list of supported SASL mechanisms */
1092 status
= ads_do_search(ads
, "", LDAP_SCOPE_BASE
, "(objectclass=*)", attrs
, &res
);
1093 if (!ADS_ERR_OK(status
)) return status
;
1095 values
= ldap_get_values(ads
->ldap
.ld
, res
, "supportedSASLMechanisms");
1097 if (ads
->auth
.flags
& ADS_AUTH_SASL_SEAL
) {
1098 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_SEAL
;
1099 } else if (ads
->auth
.flags
& ADS_AUTH_SASL_SIGN
) {
1100 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_SIGN
;
1102 ads
->ldap
.wrap_type
= ADS_SASLWRAP_TYPE_PLAIN
;
1105 /* try our supported mechanisms in order */
1106 for (i
=0;sasl_mechanisms
[i
].name
;i
++) {
1107 /* see if the server supports it */
1108 for (j
=0;values
&& values
[j
];j
++) {
1109 if (strcmp(values
[j
], sasl_mechanisms
[i
].name
) == 0) {
1110 DEBUG(4,("Found SASL mechanism %s\n", values
[j
]));
1111 status
= sasl_mechanisms
[i
].fn(ads
);
1112 ldap_value_free(values
);
1119 ldap_value_free(values
);
1121 return ADS_ERROR(LDAP_AUTH_METHOD_NOT_SUPPORTED
);
1124 #endif /* HAVE_LDAP */