2 * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
3 * Copyright (c) 2004-2009, Andrew Bartlett <abartlet@samba.org>.
4 * Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include "system/time.h"
37 #include "../libds/common/flags.h"
38 #include "lib/ldb/include/ldb.h"
39 #include "lib/ldb/include/ldb_errors.h"
40 #include "librpc/gen_ndr/netlogon.h"
41 #include "libcli/security/security.h"
42 #include "auth/auth.h"
43 #include "auth/credentials/credentials.h"
44 #include "auth/auth_sam.h"
45 #include "../lib/util/util_ldb.h"
46 #include "dsdb/samdb/samdb.h"
47 #include "librpc/ndr/libndr.h"
48 #include "librpc/gen_ndr/ndr_drsblobs.h"
49 #include "librpc/gen_ndr/lsa.h"
50 #include "libcli/auth/libcli_auth.h"
51 #include "param/param.h"
52 #include "events/events.h"
54 #include "../lib/crypto/md4.h"
56 enum hdb_samba4_ent_type
57 { HDB_SAMBA4_ENT_TYPE_CLIENT
, HDB_SAMBA4_ENT_TYPE_SERVER
,
58 HDB_SAMBA4_ENT_TYPE_KRBTGT
, HDB_SAMBA4_ENT_TYPE_TRUST
, HDB_SAMBA4_ENT_TYPE_ANY
};
60 enum trust_direction
{
62 INBOUND
= LSA_TRUST_DIRECTION_INBOUND
,
63 OUTBOUND
= LSA_TRUST_DIRECTION_OUTBOUND
66 static const char *trust_attrs
[] = {
71 "msDS-SupportedEncryptionTypes",
78 static KerberosTime
ldb_msg_find_krb5time_ldap_time(struct ldb_message
*msg
, const char *attr
, KerberosTime default_val
)
84 gentime
= ldb_msg_find_attr_as_string(msg
, attr
, NULL
);
88 tmp
= strptime(gentime
, "%Y%m%d%H%M%SZ", &tm
);
96 static HDBFlags
uf2HDBFlags(krb5_context context
, int userAccountControl
, enum hdb_samba4_ent_type ent_type
)
98 HDBFlags flags
= int2HDBFlags(0);
100 /* we don't allow kadmin deletes */
103 /* mark the principal as invalid to start with */
108 /* All accounts are servers, but this may be disabled again in the caller */
111 /* Account types - clear the invalid bit if it turns out to be valid */
112 if (userAccountControl
& UF_NORMAL_ACCOUNT
) {
113 if (ent_type
== HDB_SAMBA4_ENT_TYPE_CLIENT
|| ent_type
== HDB_SAMBA4_ENT_TYPE_ANY
) {
119 if (userAccountControl
& UF_INTERDOMAIN_TRUST_ACCOUNT
) {
120 if (ent_type
== HDB_SAMBA4_ENT_TYPE_CLIENT
|| ent_type
== HDB_SAMBA4_ENT_TYPE_ANY
) {
125 if (userAccountControl
& UF_WORKSTATION_TRUST_ACCOUNT
) {
126 if (ent_type
== HDB_SAMBA4_ENT_TYPE_CLIENT
|| ent_type
== HDB_SAMBA4_ENT_TYPE_ANY
) {
131 if (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) {
132 if (ent_type
== HDB_SAMBA4_ENT_TYPE_CLIENT
|| ent_type
== HDB_SAMBA4_ENT_TYPE_ANY
) {
138 /* Not permitted to act as a client if disabled */
139 if (userAccountControl
& UF_ACCOUNTDISABLE
) {
142 if (userAccountControl
& UF_LOCKOUT
) {
146 if (userAccountControl & UF_PASSWORD_NOTREQD) {
151 UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
153 if (userAccountControl
& UF_TEMP_DUPLICATE_ACCOUNT
) {
157 /* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in hdb_samba4_message2entry() */
160 if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
164 if (userAccountControl
& UF_SMARTCARD_REQUIRED
) {
165 flags
.require_hwauth
= 1;
167 if (userAccountControl
& UF_TRUSTED_FOR_DELEGATION
) {
168 flags
.ok_as_delegate
= 1;
170 if (!(userAccountControl
& UF_NOT_DELEGATED
)) {
171 flags
.forwardable
= 1;
175 if (userAccountControl
& UF_DONT_REQUIRE_PREAUTH
) {
176 flags
.require_preauth
= 0;
178 flags
.require_preauth
= 1;
184 static int hdb_samba4_destructor(struct hdb_samba4_private
*p
)
186 hdb_entry_ex
*entry_ex
= p
->entry_ex
;
187 free_hdb_entry(&entry_ex
->entry
);
191 static void hdb_samba4_free_entry(krb5_context context
, hdb_entry_ex
*entry_ex
)
193 talloc_free(entry_ex
->ctx
);
196 static krb5_error_code
hdb_samba4_message2entry_keys(krb5_context context
,
197 struct smb_iconv_convenience
*iconv_convenience
,
199 struct ldb_message
*msg
,
200 unsigned int userAccountControl
,
201 hdb_entry_ex
*entry_ex
)
203 krb5_error_code ret
= 0;
204 enum ndr_err_code ndr_err
;
205 struct samr_Password
*hash
;
206 const struct ldb_val
*sc_val
;
207 struct supplementalCredentialsBlob scb
;
208 struct supplementalCredentialsPackage
*scpk
= NULL
;
209 bool newer_keys
= false;
210 struct package_PrimaryKerberosBlob _pkb
;
211 struct package_PrimaryKerberosCtr3
*pkb3
= NULL
;
212 struct package_PrimaryKerberosCtr4
*pkb4
= NULL
;
214 uint32_t allocated_keys
= 0;
216 entry_ex
->entry
.keys
.val
= NULL
;
217 entry_ex
->entry
.keys
.len
= 0;
219 entry_ex
->entry
.kvno
= ldb_msg_find_attr_as_int(msg
, "msDS-KeyVersionNumber", 0);
221 /* Get keys from the db */
223 hash
= samdb_result_hash(mem_ctx
, msg
, "unicodePwd");
224 sc_val
= ldb_msg_find_ldb_val(msg
, "supplementalCredentials");
226 /* unicodePwd for enctype 0x17 (23) if present */
231 /* supplementalCredentials if present */
233 ndr_err
= ndr_pull_struct_blob_all(sc_val
, mem_ctx
, iconv_convenience
, &scb
,
234 (ndr_pull_flags_fn_t
)ndr_pull_supplementalCredentialsBlob
);
235 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
236 dump_data(0, sc_val
->data
, sc_val
->length
);
241 if (scb
.sub
.signature
!= SUPPLEMENTAL_CREDENTIALS_SIGNATURE
) {
242 NDR_PRINT_DEBUG(supplementalCredentialsBlob
, &scb
);
247 for (i
=0; i
< scb
.sub
.num_packages
; i
++) {
248 if (strcmp("Primary:Kerberos-Newer-Keys", scb
.sub
.packages
[i
].name
) == 0) {
249 scpk
= &scb
.sub
.packages
[i
];
250 if (!scpk
->data
|| !scpk
->data
[0]) {
256 } else if (strcmp("Primary:Kerberos", scb
.sub
.packages
[i
].name
) == 0) {
257 scpk
= &scb
.sub
.packages
[i
];
258 if (!scpk
->data
|| !scpk
->data
[0]) {
262 * we don't break here in hope to find
263 * a Kerberos-Newer-Keys package
269 * Primary:Kerberos-Newer-Keys or Primary:Kerberos element
270 * of supplementalCredentials
275 blob
= strhex_to_data_blob(mem_ctx
, scpk
->data
);
281 /* we cannot use ndr_pull_struct_blob_all() here, as w2k and w2k3 add padding bytes */
282 ndr_err
= ndr_pull_struct_blob(&blob
, mem_ctx
, iconv_convenience
, &_pkb
,
283 (ndr_pull_flags_fn_t
)ndr_pull_package_PrimaryKerberosBlob
);
284 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
286 krb5_set_error_message(context
, ret
, "hdb_samba4_message2entry_keys: could not parse package_PrimaryKerberosBlob");
287 krb5_warnx(context
, "hdb_samba4_message2entry_keys: could not parse package_PrimaryKerberosBlob");
291 if (newer_keys
&& _pkb
.version
!= 4) {
293 krb5_set_error_message(context
, ret
, "hdb_samba4_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
294 krb5_warnx(context
, "hdb_samba4_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
298 if (!newer_keys
&& _pkb
.version
!= 3) {
300 krb5_set_error_message(context
, ret
, "hdb_samba4_message2entry_keys: could not parse Primary:Kerberos not version 3");
301 krb5_warnx(context
, "hdb_samba4_message2entry_keys: could not parse Primary:Kerberos not version 3");
305 if (_pkb
.version
== 4) {
306 pkb4
= &_pkb
.ctr
.ctr4
;
307 allocated_keys
+= pkb4
->num_keys
;
308 } else if (_pkb
.version
== 3) {
309 pkb3
= &_pkb
.ctr
.ctr3
;
310 allocated_keys
+= pkb3
->num_keys
;
314 if (allocated_keys
== 0) {
315 /* oh, no password. Apparently (comment in
316 * hdb-ldap.c) this violates the ASN.1, but this
317 * allows an entry with no keys (yet). */
321 /* allocate space to decode into */
322 entry_ex
->entry
.keys
.len
= 0;
323 entry_ex
->entry
.keys
.val
= calloc(allocated_keys
, sizeof(Key
));
324 if (entry_ex
->entry
.keys
.val
== NULL
) {
329 if (hash
&& !(userAccountControl
& UF_USE_DES_KEY_ONLY
)) {
333 key
.salt
= NULL
; /* No salt for this enc type */
335 ret
= krb5_keyblock_init(context
,
336 ENCTYPE_ARCFOUR_HMAC
,
337 hash
->hash
, sizeof(hash
->hash
),
343 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
344 entry_ex
->entry
.keys
.len
++;
348 for (i
=0; i
< pkb4
->num_keys
; i
++) {
352 if (!pkb4
->keys
[i
].value
) continue;
354 if (userAccountControl
& UF_USE_DES_KEY_ONLY
) {
355 switch (pkb4
->keys
[i
].keytype
) {
356 case ENCTYPE_DES_CBC_CRC
:
357 case ENCTYPE_DES_CBC_MD5
:
370 if (pkb4
->salt
.string
) {
373 salt
= data_blob_string_const(pkb4
->salt
.string
);
375 key
.salt
= calloc(1, sizeof(*key
.salt
));
376 if (key
.salt
== NULL
) {
381 key
.salt
->type
= hdb_pw_salt
;
383 ret
= krb5_data_copy(&key
.salt
->salt
, salt
.data
, salt
.length
);
391 /* TODO: maybe pass the iteration_count somehow... */
393 ret
= krb5_keyblock_init(context
,
394 pkb4
->keys
[i
].keytype
,
395 pkb4
->keys
[i
].value
->data
,
396 pkb4
->keys
[i
].value
->length
,
398 if (ret
== KRB5_PROG_ETYPE_NOSUPP
) {
399 DEBUG(2,("Unsupported keytype ignored - type %u\n",
400 pkb4
->keys
[i
].keytype
));
413 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
414 entry_ex
->entry
.keys
.len
++;
417 for (i
=0; i
< pkb3
->num_keys
; i
++) {
421 if (!pkb3
->keys
[i
].value
) continue;
423 if (userAccountControl
& UF_USE_DES_KEY_ONLY
) {
424 switch (pkb3
->keys
[i
].keytype
) {
425 case ENCTYPE_DES_CBC_CRC
:
426 case ENCTYPE_DES_CBC_MD5
:
439 if (pkb3
->salt
.string
) {
442 salt
= data_blob_string_const(pkb3
->salt
.string
);
444 key
.salt
= calloc(1, sizeof(*key
.salt
));
445 if (key
.salt
== NULL
) {
450 key
.salt
->type
= hdb_pw_salt
;
452 ret
= krb5_data_copy(&key
.salt
->salt
, salt
.data
, salt
.length
);
460 ret
= krb5_keyblock_init(context
,
461 pkb3
->keys
[i
].keytype
,
462 pkb3
->keys
[i
].value
->data
,
463 pkb3
->keys
[i
].value
->length
,
474 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
475 entry_ex
->entry
.keys
.len
++;
481 entry_ex
->entry
.keys
.len
= 0;
483 if (entry_ex
->entry
.keys
.len
== 0 && entry_ex
->entry
.keys
.val
) {
484 free(entry_ex
->entry
.keys
.val
);
485 entry_ex
->entry
.keys
.val
= NULL
;
491 * Construct an hdb_entry from a directory entry.
493 static krb5_error_code
hdb_samba4_message2entry(krb5_context context
, HDB
*db
,
494 struct loadparm_context
*lp_ctx
,
495 TALLOC_CTX
*mem_ctx
, krb5_const_principal principal
,
496 enum hdb_samba4_ent_type ent_type
,
497 struct ldb_dn
*realm_dn
,
498 struct ldb_message
*msg
,
499 hdb_entry_ex
*entry_ex
)
501 unsigned int userAccountControl
;
503 krb5_error_code ret
= 0;
504 krb5_boolean is_computer
= FALSE
;
505 char *realm
= strupper_talloc(mem_ctx
, lp_realm(lp_ctx
));
507 struct hdb_samba4_private
*p
;
512 struct ldb_message_element
*objectclasses
;
513 struct ldb_val computer_val
;
514 const char *samAccountName
= ldb_msg_find_attr_as_string(msg
, "samAccountName", NULL
);
515 computer_val
.data
= discard_const_p(uint8_t,"computer");
516 computer_val
.length
= strlen((const char *)computer_val
.data
);
518 if (!samAccountName
) {
520 krb5_set_error_message(context
, ret
, "hdb_samba4_message2entry: no samAccountName present");
524 objectclasses
= ldb_msg_find_element(msg
, "objectClass");
526 if (objectclasses
&& ldb_msg_find_val(objectclasses
, &computer_val
)) {
530 memset(entry_ex
, 0, sizeof(*entry_ex
));
534 krb5_set_error_message(context
, ret
, "talloc_strdup: out of memory");
538 p
= talloc(mem_ctx
, struct hdb_samba4_private
);
544 p
->entry_ex
= entry_ex
;
545 p
->iconv_convenience
= lp_iconv_convenience(lp_ctx
);
547 p
->realm_dn
= talloc_reference(p
, realm_dn
);
553 talloc_set_destructor(p
, hdb_samba4_destructor
);
556 entry_ex
->free_entry
= hdb_samba4_free_entry
;
558 userAccountControl
= ldb_msg_find_attr_as_uint(msg
, "userAccountControl", 0);
561 entry_ex
->entry
.principal
= malloc(sizeof(*(entry_ex
->entry
.principal
)));
562 if (ent_type
== HDB_SAMBA4_ENT_TYPE_ANY
&& principal
== NULL
) {
563 krb5_make_principal(context
, &entry_ex
->entry
.principal
, realm
, samAccountName
, NULL
);
565 ret
= copy_Principal(principal
, entry_ex
->entry
.principal
);
567 krb5_clear_error_message(context
);
571 /* While we have copied the client principal, tests
572 * show that Win2k3 returns the 'corrected' realm, not
573 * the client-specified realm. This code attempts to
574 * replace the client principal's realm with the one
575 * we determine from our records */
577 /* this has to be with malloc() */
578 krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, realm
);
581 /* First try and figure out the flags based on the userAccountControl */
582 entry_ex
->entry
.flags
= uf2HDBFlags(context
, userAccountControl
, ent_type
);
584 /* Windows 2008 seems to enforce this (very sensible) rule by
585 * default - don't allow offline attacks on a user's password
586 * by asking for a ticket to them as a service (encrypted with
587 * their probably patheticly insecure password) */
589 if (entry_ex
->entry
.flags
.server
590 && lp_parm_bool(lp_ctx
, NULL
, "kdc", "require spn for service", true)) {
591 if (!is_computer
&& !ldb_msg_find_attr_as_string(msg
, "servicePrincipalName", NULL
)) {
592 entry_ex
->entry
.flags
.server
= 0;
597 /* These (created_by, modified_by) parts of the entry are not relevant for Samba4's use
598 * of the Heimdal KDC. They are stored in a the traditional
599 * DB for audit purposes, and still form part of the structure
602 /* use 'whenCreated' */
603 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
605 entry_ex
->entry
.created_by
.principal
= NULL
;
607 entry_ex
->entry
.modified_by
= (Event
*) malloc(sizeof(Event
));
608 if (entry_ex
->entry
.modified_by
== NULL
) {
610 krb5_set_error_message(context
, ret
, "malloc: out of memory");
614 /* use 'whenChanged' */
615 entry_ex
->entry
.modified_by
->time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenChanged", 0);
617 entry_ex
->entry
.modified_by
->principal
= NULL
;
621 /* The lack of password controls etc applies to krbtgt by
622 * virtue of being that particular RID */
623 status
= dom_sid_split_rid(NULL
, samdb_result_dom_sid(mem_ctx
, msg
, "objectSid"), NULL
, &rid
);
625 if (!NT_STATUS_IS_OK(status
)) {
630 if (rid
== DOMAIN_RID_KRBTGT
) {
631 entry_ex
->entry
.valid_end
= NULL
;
632 entry_ex
->entry
.pw_end
= NULL
;
634 entry_ex
->entry
.flags
.invalid
= 0;
635 entry_ex
->entry
.flags
.server
= 1;
637 /* Don't mark all requests for the krbtgt/realm as
638 * 'change password', as otherwise we could get into
639 * trouble, and not enforce the password expirty.
640 * Instead, only do it when request is for the kpasswd service */
641 if (ent_type
== HDB_SAMBA4_ENT_TYPE_SERVER
642 && principal
->name
.name_string
.len
== 2
643 && (strcmp(principal
->name
.name_string
.val
[0], "kadmin") == 0)
644 && (strcmp(principal
->name
.name_string
.val
[1], "changepw") == 0)
645 && lp_is_my_domain_or_realm(lp_ctx
, principal
->realm
)) {
646 entry_ex
->entry
.flags
.change_pw
= 1;
648 entry_ex
->entry
.flags
.client
= 0;
649 entry_ex
->entry
.flags
.forwardable
= 1;
650 entry_ex
->entry
.flags
.ok_as_delegate
= 1;
651 } else if (entry_ex
->entry
.flags
.server
&& ent_type
== HDB_SAMBA4_ENT_TYPE_SERVER
) {
652 /* The account/password expiry only applies when the account is used as a
653 * client (ie password login), not when used as a server */
655 /* Make very well sure we don't use this for a client,
656 * it could bypass the password restrictions */
657 entry_ex
->entry
.flags
.client
= 0;
659 entry_ex
->entry
.valid_end
= NULL
;
660 entry_ex
->entry
.pw_end
= NULL
;
663 NTTIME must_change_time
664 = samdb_result_force_password_change((struct ldb_context
*)db
->hdb_db
, mem_ctx
,
666 if (must_change_time
== 0x7FFFFFFFFFFFFFFFULL
) {
667 entry_ex
->entry
.pw_end
= NULL
;
669 entry_ex
->entry
.pw_end
= malloc(sizeof(*entry_ex
->entry
.pw_end
));
670 if (entry_ex
->entry
.pw_end
== NULL
) {
674 *entry_ex
->entry
.pw_end
= nt_time_to_unix(must_change_time
);
677 acct_expiry
= samdb_result_account_expires(msg
);
678 if (acct_expiry
== 0x7FFFFFFFFFFFFFFFULL
) {
679 entry_ex
->entry
.valid_end
= NULL
;
681 entry_ex
->entry
.valid_end
= malloc(sizeof(*entry_ex
->entry
.valid_end
));
682 if (entry_ex
->entry
.valid_end
== NULL
) {
686 *entry_ex
->entry
.valid_end
= nt_time_to_unix(acct_expiry
);
690 entry_ex
->entry
.valid_start
= NULL
;
692 entry_ex
->entry
.max_life
= NULL
;
694 entry_ex
->entry
.max_renew
= NULL
;
696 entry_ex
->entry
.generation
= NULL
;
698 /* Get keys from the db */
699 ret
= hdb_samba4_message2entry_keys(context
, p
->iconv_convenience
, p
, msg
, userAccountControl
, entry_ex
);
701 /* Could be bougus data in the entry, or out of memory */
705 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
706 if (entry_ex
->entry
.etypes
== NULL
) {
707 krb5_clear_error_message(context
);
711 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
712 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
713 if (entry_ex
->entry
.etypes
->val
== NULL
) {
714 krb5_clear_error_message(context
);
718 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
719 entry_ex
->entry
.etypes
->val
[i
] = entry_ex
->entry
.keys
.val
[i
].key
.keytype
;
723 p
->msg
= talloc_steal(p
, msg
);
724 p
->samdb
= (struct ldb_context
*)db
->hdb_db
;
728 /* This doesn't free ent itself, that is for the eventual caller to do */
729 hdb_free_entry(context
, entry_ex
);
731 talloc_steal(db
, entry_ex
->ctx
);
738 * Construct an hdb_entry from a directory entry.
740 static krb5_error_code
hdb_samba4_trust_message2entry(krb5_context context
, HDB
*db
,
741 struct loadparm_context
*lp_ctx
,
742 TALLOC_CTX
*mem_ctx
, krb5_const_principal principal
,
743 enum trust_direction direction
,
744 struct ldb_dn
*realm_dn
,
745 struct ldb_message
*msg
,
746 hdb_entry_ex
*entry_ex
)
749 const char *dnsdomain
;
751 DATA_BLOB password_utf16
;
752 struct samr_Password password_hash
;
753 const struct ldb_val
*password_val
;
754 struct trustAuthInOutBlob password_blob
;
755 struct hdb_samba4_private
*p
;
757 enum ndr_err_code ndr_err
;
758 int i
, ret
, trust_direction_flags
;
760 p
= talloc(mem_ctx
, struct hdb_samba4_private
);
766 p
->entry_ex
= entry_ex
;
767 p
->iconv_convenience
= lp_iconv_convenience(lp_ctx
);
769 p
->realm_dn
= realm_dn
;
771 talloc_set_destructor(p
, hdb_samba4_destructor
);
774 entry_ex
->free_entry
= hdb_samba4_free_entry
;
776 /* use 'whenCreated' */
777 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
779 entry_ex
->entry
.created_by
.principal
= NULL
;
781 entry_ex
->entry
.valid_start
= NULL
;
783 trust_direction_flags
= ldb_msg_find_attr_as_int(msg
, "trustDirection", 0);
785 if (direction
== INBOUND
) {
786 realm
= strupper_talloc(mem_ctx
, lp_realm(lp_ctx
));
787 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthIncoming");
789 } else { /* OUTBOUND */
790 dnsdomain
= ldb_msg_find_attr_as_string(msg
, "trustPartner", NULL
);
791 realm
= strupper_talloc(mem_ctx
, dnsdomain
);
792 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthOutgoing");
795 if (!password_val
|| !(trust_direction_flags
& direction
)) {
800 ndr_err
= ndr_pull_struct_blob(password_val
, mem_ctx
, p
->iconv_convenience
, &password_blob
,
801 (ndr_pull_flags_fn_t
)ndr_pull_trustAuthInOutBlob
);
802 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
807 entry_ex
->entry
.kvno
= -1;
808 for (i
=0; i
< password_blob
.count
; i
++) {
809 if (password_blob
.current
->array
[i
].AuthType
== TRUST_AUTH_TYPE_VERSION
) {
810 entry_ex
->entry
.kvno
= password_blob
.current
->array
[i
].AuthInfo
.version
.version
;
814 for (i
=0; i
< password_blob
.count
; i
++) {
815 if (password_blob
.current
->array
[i
].AuthType
== TRUST_AUTH_TYPE_CLEAR
) {
816 password_utf16
= data_blob_const(password_blob
.current
->array
[i
].AuthInfo
.clear
.password
,
817 password_blob
.current
->array
[i
].AuthInfo
.clear
.size
);
818 /* In the future, generate all sorts of
819 * hashes, but for now we can't safely convert
820 * the random strings windows uses into
823 /* but as it is utf16 already, we can get the NT password/arcfour-hmac-md5 key */
824 mdfour(password_hash
.hash
, password_utf16
.data
, password_utf16
.length
);
826 } else if (password_blob
.current
->array
[i
].AuthType
== TRUST_AUTH_TYPE_NT4OWF
) {
827 password_hash
= password_blob
.current
->array
[i
].AuthInfo
.nt4owf
.password
;
831 entry_ex
->entry
.keys
.len
= 0;
832 entry_ex
->entry
.keys
.val
= NULL
;
834 if (i
< password_blob
.count
) {
836 /* Must have found a cleartext or MD4 password */
837 entry_ex
->entry
.keys
.val
= calloc(1, sizeof(Key
));
840 key
.salt
= NULL
; /* No salt for this enc type */
842 if (entry_ex
->entry
.keys
.val
== NULL
) {
847 ret
= krb5_keyblock_init(context
,
848 ENCTYPE_ARCFOUR_HMAC
,
849 password_hash
.hash
, sizeof(password_hash
.hash
),
852 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
853 entry_ex
->entry
.keys
.len
++;
856 entry_ex
->entry
.principal
= malloc(sizeof(*(entry_ex
->entry
.principal
)));
858 ret
= copy_Principal(principal
, entry_ex
->entry
.principal
);
860 krb5_clear_error_message(context
);
864 /* While we have copied the client principal, tests
865 * show that Win2k3 returns the 'corrected' realm, not
866 * the client-specified realm. This code attempts to
867 * replace the client principal's realm with the one
868 * we determine from our records */
870 krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, realm
);
871 entry_ex
->entry
.flags
= int2HDBFlags(0);
872 entry_ex
->entry
.flags
.immutable
= 1;
873 entry_ex
->entry
.flags
.invalid
= 0;
874 entry_ex
->entry
.flags
.server
= 1;
875 entry_ex
->entry
.flags
.require_preauth
= 1;
877 entry_ex
->entry
.pw_end
= NULL
;
879 entry_ex
->entry
.max_life
= NULL
;
881 entry_ex
->entry
.max_renew
= NULL
;
883 entry_ex
->entry
.generation
= NULL
;
885 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
886 if (entry_ex
->entry
.etypes
== NULL
) {
887 krb5_clear_error_message(context
);
891 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
892 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
893 if (entry_ex
->entry
.etypes
->val
== NULL
) {
894 krb5_clear_error_message(context
);
898 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
899 entry_ex
->entry
.etypes
->val
[i
] = entry_ex
->entry
.keys
.val
[i
].key
.keytype
;
903 p
->msg
= talloc_steal(p
, msg
);
904 p
->samdb
= (struct ldb_context
*)db
->hdb_db
;
908 /* This doesn't free ent itself, that is for the eventual caller to do */
909 hdb_free_entry(context
, entry_ex
);
911 talloc_steal(db
, entry_ex
->ctx
);
918 static krb5_error_code
hdb_samba4_lookup_trust(krb5_context context
, struct ldb_context
*ldb_ctx
,
921 struct ldb_dn
*realm_dn
,
922 struct ldb_message
**pmsg
)
927 const char * const *attrs
= trust_attrs
;
929 struct ldb_result
*res
= NULL
;
930 filter
= talloc_asprintf(mem_ctx
, "(&(objectClass=trustedDomain)(|(flatname=%s)(trustPartner=%s)))", realm
, realm
);
934 krb5_set_error_message(context
, ret
, "talloc_asprintf: out of memory");
938 lret
= ldb_search(ldb_ctx
, mem_ctx
, &res
,
939 ldb_get_default_basedn(ldb_ctx
),
940 LDB_SCOPE_SUBTREE
, attrs
, "%s", filter
);
941 if (lret
!= LDB_SUCCESS
) {
942 DEBUG(3, ("Failed to search for %s: %s\n", filter
, ldb_errstring(ldb_ctx
)));
943 return HDB_ERR_NOENTRY
;
944 } else if (res
->count
== 0 || res
->count
> 1) {
945 DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter
, res
->count
));
947 return HDB_ERR_NOENTRY
;
949 talloc_steal(mem_ctx
, res
->msgs
);
950 *pmsg
= res
->msgs
[0];
955 static krb5_error_code
hdb_samba4_open(krb5_context context
, HDB
*db
, int flags
, mode_t mode
)
957 if (db
->hdb_master_key_set
) {
958 krb5_error_code ret
= HDB_ERR_NOENTRY
;
959 krb5_warnx(context
, "hdb_samba4_open: use of a master key incompatible with LDB\n");
960 krb5_set_error_message(context
, ret
, "hdb_samba4_open: use of a master key incompatible with LDB\n");
967 static krb5_error_code
hdb_samba4_close(krb5_context context
, HDB
*db
)
972 static krb5_error_code
hdb_samba4_lock(krb5_context context
, HDB
*db
, int operation
)
977 static krb5_error_code
hdb_samba4_unlock(krb5_context context
, HDB
*db
)
982 static krb5_error_code
hdb_samba4_rename(krb5_context context
, HDB
*db
, const char *new_name
)
984 return HDB_ERR_DB_INUSE
;
987 static krb5_error_code
hdb_samba4_lookup_client(krb5_context context
, HDB
*db
,
988 struct loadparm_context
*lp_ctx
,
990 krb5_const_principal principal
,
992 struct ldb_dn
**realm_dn
,
993 struct ldb_message
**msg
) {
995 char *principal_string
;
998 ret
= krb5_unparse_name(context
, principal
, &principal_string
);
1004 nt_status
= sam_get_results_principal((struct ldb_context
*)db
->hdb_db
,
1005 mem_ctx
, principal_string
, attrs
,
1007 free(principal_string
);
1008 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_SUCH_USER
)) {
1009 return HDB_ERR_NOENTRY
;
1010 } else if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_MEMORY
)) {
1012 } else if (!NT_STATUS_IS_OK(nt_status
)) {
1019 static krb5_error_code
hdb_samba4_fetch_client(krb5_context context
, HDB
*db
,
1020 struct loadparm_context
*lp_ctx
,
1021 TALLOC_CTX
*mem_ctx
,
1022 krb5_const_principal principal
,
1024 hdb_entry_ex
*entry_ex
) {
1025 struct ldb_dn
*realm_dn
;
1026 krb5_error_code ret
;
1027 struct ldb_message
*msg
= NULL
;
1029 ret
= hdb_samba4_lookup_client(context
, db
, lp_ctx
,
1030 mem_ctx
, principal
, user_attrs
,
1036 ret
= hdb_samba4_message2entry(context
, db
, lp_ctx
, mem_ctx
,
1037 principal
, HDB_SAMBA4_ENT_TYPE_CLIENT
,
1038 realm_dn
, msg
, entry_ex
);
1042 static krb5_error_code
hdb_samba4_fetch_krbtgt(krb5_context context
, HDB
*db
,
1043 struct loadparm_context
*lp_ctx
,
1044 TALLOC_CTX
*mem_ctx
,
1045 krb5_const_principal principal
,
1047 hdb_entry_ex
*entry_ex
)
1049 krb5_error_code ret
;
1050 struct ldb_message
*msg
= NULL
;
1051 struct ldb_dn
*realm_dn
= ldb_get_default_basedn(db
->hdb_db
);
1054 krb5_principal alloc_principal
= NULL
;
1055 if (principal
->name
.name_string
.len
!= 2
1056 || (strcmp(principal
->name
.name_string
.val
[0], KRB5_TGS_NAME
) != 0)) {
1058 return HDB_ERR_NOENTRY
;
1061 /* krbtgt case. Either us or a trusted realm */
1063 if (lp_is_my_domain_or_realm(lp_ctx
, principal
->realm
)
1064 && lp_is_my_domain_or_realm(lp_ctx
, principal
->name
.name_string
.val
[1])) {
1066 /* Cludge, cludge cludge. If the realm part of krbtgt/realm,
1067 * is in our db, then direct the caller at our primary
1073 lret
= gendb_search_single_extended_dn(db
->hdb_db
, mem_ctx
,
1074 realm_dn
, LDB_SCOPE_SUBTREE
,
1076 "(&(objectClass=user)(samAccountName=krbtgt))");
1077 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1078 krb5_warnx(context
, "hdb_samba4_fetch: could not find own KRBTGT in DB!");
1079 krb5_set_error_message(context
, HDB_ERR_NOENTRY
, "hdb_samba4_fetch: could not find own KRBTGT in DB!");
1080 return HDB_ERR_NOENTRY
;
1081 } else if (lret
!= LDB_SUCCESS
) {
1082 krb5_warnx(context
, "hdb_samba4_fetch: could not find own KRBTGT in DB: %s", ldb_errstring(db
->hdb_db
));
1083 krb5_set_error_message(context
, HDB_ERR_NOENTRY
, "hdb_samba4_fetch: could not find own KRBTGT in DB: %s", ldb_errstring(db
->hdb_db
));
1084 return HDB_ERR_NOENTRY
;
1087 realm_fixed
= strupper_talloc(mem_ctx
, lp_realm(lp_ctx
));
1090 krb5_set_error_message(context
, ret
, "strupper_talloc: out of memory");
1094 ret
= krb5_copy_principal(context
, principal
, &alloc_principal
);
1099 free(alloc_principal
->name
.name_string
.val
[1]);
1100 alloc_principal
->name
.name_string
.val
[1] = strdup(realm_fixed
);
1101 talloc_free(realm_fixed
);
1102 if (!alloc_principal
->name
.name_string
.val
[1]) {
1104 krb5_set_error_message(context
, ret
, "hdb_samba4_fetch: strdup() failed!");
1107 principal
= alloc_principal
;
1109 ret
= hdb_samba4_message2entry(context
, db
, lp_ctx
, mem_ctx
,
1110 principal
, HDB_SAMBA4_ENT_TYPE_KRBTGT
,
1111 realm_dn
, msg
, entry_ex
);
1113 krb5_warnx(context
, "hdb_samba4_fetch: self krbtgt message2entry failed");
1118 enum trust_direction direction
= UNKNOWN
;
1120 /* Either an inbound or outbound trust */
1122 if (strcasecmp(lp_realm(lp_ctx
), principal
->realm
) == 0) {
1123 /* look for inbound trust */
1124 direction
= INBOUND
;
1125 realm
= principal
->name
.name_string
.val
[1];
1128 if (strcasecmp(lp_realm(lp_ctx
), principal
->name
.name_string
.val
[1]) == 0) {
1129 /* look for outbound trust */
1130 direction
= OUTBOUND
;
1131 realm
= principal
->realm
;
1134 /* Trusted domains are under CN=system */
1136 ret
= hdb_samba4_lookup_trust(context
, (struct ldb_context
*)db
->hdb_db
,
1138 realm
, realm_dn
, &msg
);
1141 krb5_warnx(context
, "hdb_samba4_fetch: could not find principal in DB");
1142 krb5_set_error_message(context
, ret
, "hdb_samba4_fetch: could not find principal in DB");
1146 ret
= hdb_samba4_trust_message2entry(context
, db
, lp_ctx
, mem_ctx
,
1147 principal
, direction
,
1148 realm_dn
, msg
, entry_ex
);
1150 krb5_warnx(context
, "hdb_samba4_fetch: trust_message2entry failed");
1155 /* we should lookup trusted domains */
1156 return HDB_ERR_NOENTRY
;
1161 static krb5_error_code
hdb_samba4_lookup_server(krb5_context context
, HDB
*db
,
1162 struct loadparm_context
*lp_ctx
,
1163 TALLOC_CTX
*mem_ctx
,
1164 krb5_const_principal principal
,
1166 struct ldb_dn
**realm_dn
,
1167 struct ldb_message
**msg
)
1169 krb5_error_code ret
;
1171 if (principal
->name
.name_string
.len
>= 2) {
1172 /* 'normal server' case */
1175 struct ldb_dn
*user_dn
;
1176 char *principal_string
;
1178 ret
= krb5_unparse_name_flags(context
, principal
,
1179 KRB5_PRINCIPAL_UNPARSE_NO_REALM
,
1185 /* At this point we may find the host is known to be
1186 * in a different realm, so we should generate a
1187 * referral instead */
1188 nt_status
= crack_service_principal_name((struct ldb_context
*)db
->hdb_db
,
1189 mem_ctx
, principal_string
,
1190 &user_dn
, realm_dn
);
1191 free(principal_string
);
1193 if (!NT_STATUS_IS_OK(nt_status
)) {
1194 return HDB_ERR_NOENTRY
;
1197 ldb_ret
= gendb_search_single_extended_dn((struct ldb_context
*)db
->hdb_db
,
1199 user_dn
, LDB_SCOPE_BASE
,
1202 if (ldb_ret
!= LDB_SUCCESS
) {
1203 return HDB_ERR_NOENTRY
;
1208 char *filter
= NULL
;
1210 /* server as client principal case, but we must not lookup userPrincipalNames */
1211 *realm_dn
= ldb_get_default_basedn(db
->hdb_db
);
1212 realm
= krb5_principal_get_realm(context
, principal
);
1214 /* TODO: Check if it is our realm, otherwise give referall */
1216 ret
= krb5_unparse_name_flags(context
, principal
, KRB5_PRINCIPAL_UNPARSE_NO_REALM
, &short_princ
);
1219 krb5_set_error_message(context
, ret
, "hdb_samba4_lookup_principal: could not parse principal");
1220 krb5_warnx(context
, "hdb_samba4_lookup_principal: could not parse principal");
1224 lret
= gendb_search_single_extended_dn(db
->hdb_db
, mem_ctx
,
1225 *realm_dn
, LDB_SCOPE_SUBTREE
,
1226 msg
, attrs
, "(&(objectClass=user)(samAccountName=%s))",
1227 ldb_binary_encode_string(mem_ctx
, short_princ
));
1229 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1230 DEBUG(3, ("Failed find a entry for %s\n", filter
));
1231 return HDB_ERR_NOENTRY
;
1233 if (lret
!= LDB_SUCCESS
) {
1234 DEBUG(3, ("Failed single search for for %s - %s\n",
1235 filter
, ldb_errstring(db
->hdb_db
)));
1236 return HDB_ERR_NOENTRY
;
1243 static krb5_error_code
hdb_samba4_fetch_server(krb5_context context
, HDB
*db
,
1244 struct loadparm_context
*lp_ctx
,
1245 TALLOC_CTX
*mem_ctx
,
1246 krb5_const_principal principal
,
1248 hdb_entry_ex
*entry_ex
)
1250 krb5_error_code ret
;
1251 struct ldb_dn
*realm_dn
;
1252 struct ldb_message
*msg
;
1254 ret
= hdb_samba4_lookup_server(context
, db
, lp_ctx
, mem_ctx
, principal
,
1255 server_attrs
, &realm_dn
, &msg
);
1260 ret
= hdb_samba4_message2entry(context
, db
, lp_ctx
, mem_ctx
,
1261 principal
, HDB_SAMBA4_ENT_TYPE_SERVER
,
1262 realm_dn
, msg
, entry_ex
);
1264 krb5_warnx(context
, "hdb_samba4_fetch: message2entry failed");
1270 static krb5_error_code
hdb_samba4_fetch(krb5_context context
, HDB
*db
,
1271 krb5_const_principal principal
,
1273 hdb_entry_ex
*entry_ex
)
1275 krb5_error_code ret
= HDB_ERR_NOENTRY
;
1276 TALLOC_CTX
*mem_ctx
= talloc_named(db
, 0, "hdb_samba4_fetch context");
1277 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(db
->hdb_db
, "loadparm"), struct loadparm_context
);
1281 krb5_set_error_message(context
, ret
, "hdb_samba4_fetch: talloc_named() failed!");
1285 if (flags
& HDB_F_GET_CLIENT
) {
1286 ret
= hdb_samba4_fetch_client(context
, db
, lp_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1287 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1289 if (flags
& HDB_F_GET_SERVER
) {
1290 /* krbtgt fits into this situation for trusted realms, and for resolving different versions of our own realm name */
1291 ret
= hdb_samba4_fetch_krbtgt(context
, db
, lp_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1292 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1294 /* We return 'no entry' if it does not start with krbtgt/, so move to the common case quickly */
1295 ret
= hdb_samba4_fetch_server(context
, db
, lp_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1296 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1298 if (flags
& HDB_F_GET_KRBTGT
) {
1299 ret
= hdb_samba4_fetch_krbtgt(context
, db
, lp_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1300 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1304 talloc_free(mem_ctx
);
1308 static krb5_error_code
hdb_samba4_store(krb5_context context
, HDB
*db
, unsigned flags
, hdb_entry_ex
*entry
)
1310 return HDB_ERR_DB_INUSE
;
1313 static krb5_error_code
hdb_samba4_remove(krb5_context context
, HDB
*db
, krb5_const_principal principal
)
1315 return HDB_ERR_DB_INUSE
;
1318 struct hdb_samba4_seq
{
1319 struct ldb_context
*ctx
;
1320 struct loadparm_context
*lp_ctx
;
1323 struct ldb_message
**msgs
;
1324 struct ldb_dn
*realm_dn
;
1327 static krb5_error_code
hdb_samba4_seq(krb5_context context
, HDB
*db
, unsigned flags
, hdb_entry_ex
*entry
)
1329 krb5_error_code ret
;
1330 struct hdb_samba4_seq
*priv
= (struct hdb_samba4_seq
*)db
->hdb_dbc
;
1331 TALLOC_CTX
*mem_ctx
;
1332 hdb_entry_ex entry_ex
;
1333 memset(&entry_ex
, '\0', sizeof(entry_ex
));
1336 return HDB_ERR_NOENTRY
;
1339 mem_ctx
= talloc_named(priv
, 0, "hdb_samba4_seq context");
1343 krb5_set_error_message(context
, ret
, "hdb_samba4_seq: talloc_named() failed!");
1347 if (priv
->index
< priv
->count
) {
1348 ret
= hdb_samba4_message2entry(context
, db
, priv
->lp_ctx
,
1350 NULL
, HDB_SAMBA4_ENT_TYPE_ANY
,
1351 priv
->realm_dn
, priv
->msgs
[priv
->index
++], entry
);
1353 ret
= HDB_ERR_NOENTRY
;
1359 talloc_free(mem_ctx
);
1365 static krb5_error_code
hdb_samba4_firstkey(krb5_context context
, HDB
*db
, unsigned flags
,
1366 hdb_entry_ex
*entry
)
1368 struct ldb_context
*ldb_ctx
= (struct ldb_context
*)db
->hdb_db
;
1369 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb_ctx
, "loadparm"),
1370 struct loadparm_context
);
1371 struct hdb_samba4_seq
*priv
= (struct hdb_samba4_seq
*)db
->hdb_dbc
;
1373 struct ldb_result
*res
= NULL
;
1374 krb5_error_code ret
;
1375 TALLOC_CTX
*mem_ctx
;
1383 priv
= (struct hdb_samba4_seq
*) talloc(db
, struct hdb_samba4_seq
);
1386 krb5_set_error_message(context
, ret
, "talloc: out of memory");
1390 priv
->ctx
= ldb_ctx
;
1391 priv
->lp_ctx
= lp_ctx
;
1394 priv
->realm_dn
= ldb_get_default_basedn(ldb_ctx
);
1397 mem_ctx
= talloc_named(priv
, 0, "hdb_samba4_firstkey context");
1401 krb5_set_error_message(context
, ret
, "hdb_samba4_firstkey: talloc_named() failed!");
1405 ret
= krb5_get_default_realm(context
, &realm
);
1411 lret
= ldb_search(ldb_ctx
, priv
, &res
,
1412 priv
->realm_dn
, LDB_SCOPE_SUBTREE
, user_attrs
,
1413 "(objectClass=user)");
1415 if (lret
!= LDB_SUCCESS
) {
1417 return HDB_ERR_NOENTRY
;
1420 priv
->count
= res
->count
;
1421 priv
->msgs
= talloc_steal(priv
, res
->msgs
);
1426 ret
= hdb_samba4_seq(context
, db
, flags
, entry
);
1432 talloc_free(mem_ctx
);
1437 static krb5_error_code
hdb_samba4_nextkey(krb5_context context
, HDB
*db
, unsigned flags
,
1438 hdb_entry_ex
*entry
)
1440 return hdb_samba4_seq(context
, db
, flags
, entry
);
1443 static krb5_error_code
hdb_samba4_destroy(krb5_context context
, HDB
*db
)
1450 /* Check if a given entry may delegate to this target principal
1452 * This is currently a very nasty hack - allowing only delegation to itself.
1454 krb5_error_code
hdb_samba4_check_constrained_delegation(krb5_context context
, HDB
*db
,
1455 hdb_entry_ex
*entry
,
1456 krb5_const_principal target_principal
)
1458 struct ldb_context
*ldb_ctx
= (struct ldb_context
*)db
->hdb_db
;
1459 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb_ctx
, "loadparm"),
1460 struct loadparm_context
);
1461 krb5_error_code ret
;
1462 krb5_principal enterprise_prinicpal
= NULL
;
1463 struct ldb_dn
*realm_dn
;
1464 struct ldb_message
*msg
;
1465 struct dom_sid
*orig_sid
;
1466 struct dom_sid
*target_sid
;
1467 struct hdb_samba4_private
*p
= talloc_get_type(entry
->ctx
, struct hdb_samba4_private
);
1468 const char *delegation_check_attrs
[] = {
1472 TALLOC_CTX
*mem_ctx
= talloc_named(db
, 0, "hdb_samba4_check_constrained_delegation");
1476 krb5_set_error_message(context
, ret
, "hdb_samba4_fetch: talloc_named() failed!");
1480 if (target_principal
->name
.name_type
== KRB5_NT_ENTERPRISE_PRINCIPAL
) {
1481 /* Need to reparse the enterprise principal to find the real target */
1482 if (target_principal
->name
.name_string
.len
!= 1) {
1483 ret
= KRB5_PARSE_MALFORMED
;
1484 krb5_set_error_message(context
, ret
, "hdb_samba4_check_constrained_delegation: request for delegation to enterprise principal with wrong (%d) number of components",
1485 target_principal
->name
.name_string
.len
);
1486 talloc_free(mem_ctx
);
1489 ret
= krb5_parse_name(context
, target_principal
->name
.name_string
.val
[0],
1490 &enterprise_prinicpal
);
1492 talloc_free(mem_ctx
);
1495 target_principal
= enterprise_prinicpal
;
1498 ret
= hdb_samba4_lookup_server(context
, db
, lp_ctx
, mem_ctx
, target_principal
,
1499 delegation_check_attrs
, &realm_dn
, &msg
);
1501 krb5_free_principal(context
, enterprise_prinicpal
);
1504 talloc_free(mem_ctx
);
1508 orig_sid
= samdb_result_dom_sid(mem_ctx
, p
->msg
, "objectSid");
1509 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
1511 /* Allow delegation to the same principal, even if by a different
1512 * name. The easy and safe way to prove this is by SID
1514 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
1515 talloc_free(mem_ctx
);
1516 return KRB5KDC_ERR_BADOPTION
;
1519 talloc_free(mem_ctx
);
1523 /* Certificates printed by a the Certificate Authority might have a
1524 * slightly different form of the user principal name to that in the
1525 * database. Allow a mismatch where they both refer to the same
1528 krb5_error_code
hdb_samba4_check_pkinit_ms_upn_match(krb5_context context
, HDB
*db
,
1529 hdb_entry_ex
*entry
,
1530 krb5_const_principal certificate_principal
)
1532 struct ldb_context
*ldb_ctx
= (struct ldb_context
*)db
->hdb_db
;
1533 struct loadparm_context
*lp_ctx
= talloc_get_type(ldb_get_opaque(ldb_ctx
, "loadparm"),
1534 struct loadparm_context
);
1535 krb5_error_code ret
;
1536 struct ldb_dn
*realm_dn
;
1537 struct ldb_message
*msg
;
1538 struct dom_sid
*orig_sid
;
1539 struct dom_sid
*target_sid
;
1540 struct hdb_samba4_private
*p
= talloc_get_type(entry
->ctx
, struct hdb_samba4_private
);
1541 const char *ms_upn_check_attrs
[] = {
1545 TALLOC_CTX
*mem_ctx
= talloc_named(db
, 0, "hdb_samba4_check_constrained_delegation");
1549 krb5_set_error_message(context
, ret
, "hdb_samba4_fetch: talloc_named() failed!");
1553 ret
= hdb_samba4_lookup_client(context
, db
, lp_ctx
,
1554 mem_ctx
, certificate_principal
,
1555 ms_upn_check_attrs
, &realm_dn
, &msg
);
1558 talloc_free(mem_ctx
);
1562 orig_sid
= samdb_result_dom_sid(mem_ctx
, p
->msg
, "objectSid");
1563 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
1565 /* Consider these to be the same principal, even if by a different
1566 * name. The easy and safe way to prove this is by SID
1568 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
1569 talloc_free(mem_ctx
);
1570 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1573 talloc_free(mem_ctx
);
1577 /* This interface is to be called by the KDC and libnet_keytab_dump, which is expecting Samba
1578 * calling conventions. It is also called by a wrapper
1579 * (hdb_samba4_create) from the kpasswdd -> krb5 -> keytab_hdb -> hdb
1582 NTSTATUS
hdb_samba4_create_kdc(TALLOC_CTX
*mem_ctx
,
1583 struct tevent_context
*ev_ctx
,
1584 struct loadparm_context
*lp_ctx
,
1585 krb5_context context
, struct HDB
**db
)
1587 struct auth_session_info
*session_info
;
1590 *db
= talloc(mem_ctx
, HDB
);
1592 krb5_set_error_message(context
, ENOMEM
, "malloc: out of memory");
1593 return NT_STATUS_NO_MEMORY
;
1596 (*db
)->hdb_master_key_set
= 0;
1597 (*db
)->hdb_db
= NULL
;
1598 (*db
)->hdb_capability_flags
= 0;
1601 /* we would prefer to use system_session(), as that would
1602 * allow us to share the samdb backend context with other parts of the
1603 * system. For now we can't as we need to override the
1604 * credentials to set CRED_DONT_USE_KERBEROS, which would
1605 * break other users of the system_session */
1606 DEBUG(0,("FIXME: Using new system session for hdb\n"));
1607 nt_status
= auth_system_session_info(*db
, lp_ctx
, &session_info
);
1608 if (!NT_STATUS_IS_OK(nt_status
)) {
1612 session_info
= system_session(lp_ctx
);
1613 if (session_info
== NULL
) {
1614 return NT_STATUS_INTERNAL_ERROR
;
1618 /* The idea here is very simple. Using Kerberos to
1619 * authenticate the KDC to the LDAP server is higly likely to
1622 * In future we may set this up to use EXERNAL and SSL
1623 * certificates, for now it will almost certainly be NTLMSSP_SET_USERNAME
1626 cli_credentials_set_kerberos_state(session_info
->credentials
,
1627 CRED_DONT_USE_KERBEROS
);
1629 /* Setup the link to LDB */
1630 (*db
)->hdb_db
= samdb_connect(*db
, ev_ctx
, lp_ctx
, session_info
);
1631 if ((*db
)->hdb_db
== NULL
) {
1632 DEBUG(1, ("hdb_samba4_create: Cannot open samdb for KDC backend!"));
1633 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1636 (*db
)->hdb_dbc
= NULL
;
1637 (*db
)->hdb_open
= hdb_samba4_open
;
1638 (*db
)->hdb_close
= hdb_samba4_close
;
1639 (*db
)->hdb_fetch
= hdb_samba4_fetch
;
1640 (*db
)->hdb_store
= hdb_samba4_store
;
1641 (*db
)->hdb_remove
= hdb_samba4_remove
;
1642 (*db
)->hdb_firstkey
= hdb_samba4_firstkey
;
1643 (*db
)->hdb_nextkey
= hdb_samba4_nextkey
;
1644 (*db
)->hdb_lock
= hdb_samba4_lock
;
1645 (*db
)->hdb_unlock
= hdb_samba4_unlock
;
1646 (*db
)->hdb_rename
= hdb_samba4_rename
;
1647 /* we don't implement these, as we are not a lockable database */
1648 (*db
)->hdb__get
= NULL
;
1649 (*db
)->hdb__put
= NULL
;
1650 /* kadmin should not be used for deletes - use other tools instead */
1651 (*db
)->hdb__del
= NULL
;
1652 (*db
)->hdb_destroy
= hdb_samba4_destroy
;
1654 (*db
)->hdb_auth_status
= NULL
;
1655 (*db
)->hdb_check_constrained_delegation
= hdb_samba4_check_constrained_delegation
;
1656 (*db
)->hdb_check_pkinit_ms_upn_match
= hdb_samba4_check_pkinit_ms_upn_match
;
1658 return NT_STATUS_OK
;
1661 static krb5_error_code
hdb_samba4_create(krb5_context context
, struct HDB
**db
, const char *arg
)
1665 struct hdb_samba4_context
*hdb_samba4_context
;
1667 if (sscanf(arg
, "&%p", &ptr
) != 1) {
1670 hdb_samba4_context
= talloc_get_type_abort(ptr
, struct hdb_samba4_context
);
1671 /* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
1672 nt_status
= hdb_samba4_create_kdc(hdb_samba4_context
, hdb_samba4_context
->ev_ctx
, hdb_samba4_context
->lp_ctx
,
1675 if (NT_STATUS_IS_OK(nt_status
)) {
1681 /* Only used in the hdb-backed keytab code
1682 * for a keytab of 'samba4&<address>', to find
1683 * kpasswd's key in the main DB, and to
1684 * copy all the keys into a file (libnet_keytab_export)
1686 * The <address> is the string form of a pointer to a talloced struct hdb_samba_context
1688 struct hdb_method hdb_samba4
= {
1689 .interface_version
= HDB_INTERFACE_VERSION
,
1691 .create
= hdb_samba4_create