2 Unix SMB/CIFS implementation.
4 Database Glue between Samba and the KDC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2009
7 Copyright (C) Simo Sorce <idra@samba.org> 2010
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "libcli/security/security.h"
26 #include "auth/auth.h"
27 #include "auth/auth_sam.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "dsdb/common/util.h"
30 #include "librpc/gen_ndr/ndr_drsblobs.h"
31 #include "param/param.h"
32 #include "../lib/crypto/md4.h"
33 #include "system/kerberos.h"
34 #include "auth/kerberos/kerberos.h"
36 #include "kdc/samba_kdc.h"
37 #include "kdc/kdc-policy.h"
39 #define SAMBA_KVNO_GET_KRBTGT(kvno) \
40 ((uint16_t)(((uint32_t)kvno) >> 16))
42 #define SAMBA_KVNO_AND_KRBTGT(kvno, krbtgt) \
43 ((krb5_kvno)((((uint32_t)kvno) & 0xFFFF) | \
44 ((((uint32_t)krbtgt) << 16) & 0xFFFF0000)))
46 enum samba_kdc_ent_type
47 { SAMBA_KDC_ENT_TYPE_CLIENT
, SAMBA_KDC_ENT_TYPE_SERVER
,
48 SAMBA_KDC_ENT_TYPE_KRBTGT
, SAMBA_KDC_ENT_TYPE_TRUST
, SAMBA_KDC_ENT_TYPE_ANY
};
50 enum trust_direction
{
52 INBOUND
= LSA_TRUST_DIRECTION_INBOUND
,
53 OUTBOUND
= LSA_TRUST_DIRECTION_OUTBOUND
56 static const char *trust_attrs
[] = {
61 "msDS-SupportedEncryptionTypes",
68 static KerberosTime
ldb_msg_find_krb5time_ldap_time(struct ldb_message
*msg
, const char *attr
, KerberosTime default_val
)
74 gentime
= ldb_msg_find_attr_as_string(msg
, attr
, NULL
);
78 tmp
= strptime(gentime
, "%Y%m%d%H%M%SZ", &tm
);
86 static HDBFlags
uf2HDBFlags(krb5_context context
, uint32_t userAccountControl
, enum samba_kdc_ent_type ent_type
)
88 HDBFlags flags
= int2HDBFlags(0);
90 /* we don't allow kadmin deletes */
93 /* mark the principal as invalid to start with */
98 /* All accounts are servers, but this may be disabled again in the caller */
101 /* Account types - clear the invalid bit if it turns out to be valid */
102 if (userAccountControl
& UF_NORMAL_ACCOUNT
) {
103 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
109 if (userAccountControl
& UF_INTERDOMAIN_TRUST_ACCOUNT
) {
110 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
115 if (userAccountControl
& UF_WORKSTATION_TRUST_ACCOUNT
) {
116 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
121 if (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) {
122 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
128 /* Not permitted to act as a client if disabled */
129 if (userAccountControl
& UF_ACCOUNTDISABLE
) {
132 if (userAccountControl
& UF_LOCKOUT
) {
136 if (userAccountControl & UF_PASSWORD_NOTREQD) {
141 UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
143 if (userAccountControl
& UF_TEMP_DUPLICATE_ACCOUNT
) {
147 /* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in samba_kdc_message2entry() */
150 if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
154 if (userAccountControl
& UF_SMARTCARD_REQUIRED
) {
155 flags
.require_hwauth
= 1;
157 if (userAccountControl
& UF_TRUSTED_FOR_DELEGATION
) {
158 flags
.ok_as_delegate
= 1;
160 if (!(userAccountControl
& UF_NOT_DELEGATED
)) {
161 flags
.forwardable
= 1;
165 if (userAccountControl
& UF_DONT_REQUIRE_PREAUTH
) {
166 flags
.require_preauth
= 0;
168 flags
.require_preauth
= 1;
174 static int samba_kdc_entry_destructor(struct samba_kdc_entry
*p
)
176 hdb_entry_ex
*entry_ex
= p
->entry_ex
;
177 free_hdb_entry(&entry_ex
->entry
);
181 static void samba_kdc_free_entry(krb5_context context
, hdb_entry_ex
*entry_ex
)
183 /* this function is called only from hdb_free_entry().
184 * Make sure we neutralize the destructor or we will
185 * get a double free later when hdb_free_entry() will
186 * try to call free_hdb_entry() */
187 talloc_set_destructor(entry_ex
->ctx
, NULL
);
189 /* now proceed to free the talloc part */
190 talloc_free(entry_ex
->ctx
);
193 static krb5_error_code
samba_kdc_message2entry_keys(krb5_context context
,
194 struct samba_kdc_db_context
*kdc_db_ctx
,
196 struct ldb_message
*msg
,
199 uint32_t userAccountControl
,
200 enum samba_kdc_ent_type ent_type
,
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 uint16_t allocated_keys
= 0;
215 int rodc_krbtgt_number
= 0;
217 uint32_t supported_enctypes
218 = ldb_msg_find_attr_as_uint(msg
,
219 "msDS-SupportedEncryptionTypes",
222 if (rid
== DOMAIN_RID_KRBTGT
|| is_rodc
) {
223 /* KDCs (and KDCs on RODCs) use AES */
224 supported_enctypes
|= ENC_HMAC_SHA1_96_AES128
| ENC_HMAC_SHA1_96_AES256
;
225 } else if (userAccountControl
& (UF_PARTIAL_SECRETS_ACCOUNT
|UF_SERVER_TRUST_ACCOUNT
)) {
226 /* DCs and RODCs comptuer accounts use AES */
227 supported_enctypes
|= ENC_HMAC_SHA1_96_AES128
| ENC_HMAC_SHA1_96_AES256
;
228 } else if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
||
229 (ent_type
== SAMBA_KDC_ENT_TYPE_ANY
)) {
230 /* for AS-REQ the client chooses the enc types it
231 * supports, and this will vary between computers a
234 * likewise for 'any' return as much as is supported,
235 * to export into a keytab */
236 supported_enctypes
= ENC_ALL_TYPES
;
239 /* If UF_USE_DES_KEY_ONLY has been set, then don't allow use of the newer enc types */
240 if (userAccountControl
& UF_USE_DES_KEY_ONLY
) {
241 supported_enctypes
= ENC_CRC32
|ENC_RSA_MD5
;
243 /* Otherwise, add in the default enc types */
244 supported_enctypes
|= ENC_CRC32
| ENC_RSA_MD5
| ENC_RC4_HMAC_MD5
;
247 /* Is this the krbtgt or a RODC krbtgt */
249 rodc_krbtgt_number
= ldb_msg_find_attr_as_int(msg
, "msDS-SecondaryKrbTgtNumber", -1);
251 if (rodc_krbtgt_number
== -1) {
256 entry_ex
->entry
.keys
.val
= NULL
;
257 entry_ex
->entry
.keys
.len
= 0;
259 kvno
= ldb_msg_find_attr_as_int(msg
, "msDS-KeyVersionNumber", 0);
261 kvno
= SAMBA_KVNO_AND_KRBTGT(kvno
, rodc_krbtgt_number
);
263 entry_ex
->entry
.kvno
= kvno
;
265 /* Get keys from the db */
267 hash
= samdb_result_hash(mem_ctx
, msg
, "unicodePwd");
268 sc_val
= ldb_msg_find_ldb_val(msg
, "supplementalCredentials");
270 /* unicodePwd for enctype 0x17 (23) if present */
275 /* supplementalCredentials if present */
277 ndr_err
= ndr_pull_struct_blob_all(sc_val
, mem_ctx
, &scb
,
278 (ndr_pull_flags_fn_t
)ndr_pull_supplementalCredentialsBlob
);
279 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
280 dump_data(0, sc_val
->data
, sc_val
->length
);
285 if (scb
.sub
.signature
!= SUPPLEMENTAL_CREDENTIALS_SIGNATURE
) {
286 NDR_PRINT_DEBUG(supplementalCredentialsBlob
, &scb
);
291 for (i
=0; i
< scb
.sub
.num_packages
; i
++) {
292 if (strcmp("Primary:Kerberos-Newer-Keys", scb
.sub
.packages
[i
].name
) == 0) {
293 scpk
= &scb
.sub
.packages
[i
];
294 if (!scpk
->data
|| !scpk
->data
[0]) {
300 } else if (strcmp("Primary:Kerberos", scb
.sub
.packages
[i
].name
) == 0) {
301 scpk
= &scb
.sub
.packages
[i
];
302 if (!scpk
->data
|| !scpk
->data
[0]) {
306 * we don't break here in hope to find
307 * a Kerberos-Newer-Keys package
313 * Primary:Kerberos-Newer-Keys or Primary:Kerberos element
314 * of supplementalCredentials
319 blob
= strhex_to_data_blob(mem_ctx
, scpk
->data
);
325 /* we cannot use ndr_pull_struct_blob_all() here, as w2k and w2k3 add padding bytes */
326 ndr_err
= ndr_pull_struct_blob(&blob
, mem_ctx
, &_pkb
,
327 (ndr_pull_flags_fn_t
)ndr_pull_package_PrimaryKerberosBlob
);
328 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
330 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: could not parse package_PrimaryKerberosBlob");
331 krb5_warnx(context
, "samba_kdc_message2entry_keys: could not parse package_PrimaryKerberosBlob");
335 if (newer_keys
&& _pkb
.version
!= 4) {
337 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
338 krb5_warnx(context
, "samba_kdc_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
342 if (!newer_keys
&& _pkb
.version
!= 3) {
344 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: could not parse Primary:Kerberos not version 3");
345 krb5_warnx(context
, "samba_kdc_message2entry_keys: could not parse Primary:Kerberos not version 3");
349 if (_pkb
.version
== 4) {
350 pkb4
= &_pkb
.ctr
.ctr4
;
351 allocated_keys
+= pkb4
->num_keys
;
352 } else if (_pkb
.version
== 3) {
353 pkb3
= &_pkb
.ctr
.ctr3
;
354 allocated_keys
+= pkb3
->num_keys
;
358 if (allocated_keys
== 0) {
359 if (kdc_db_ctx
->rodc
) {
360 /* We are on an RODC, but don't have keys for this account. Signal this to the caller */
361 return HDB_ERR_NOT_FOUND_HERE
;
364 /* oh, no password. Apparently (comment in
365 * hdb-ldap.c) this violates the ASN.1, but this
366 * allows an entry with no keys (yet). */
370 /* allocate space to decode into */
371 entry_ex
->entry
.keys
.len
= 0;
372 entry_ex
->entry
.keys
.val
= calloc(allocated_keys
, sizeof(Key
));
373 if (entry_ex
->entry
.keys
.val
== NULL
) {
378 if (hash
&& (supported_enctypes
& ENC_RC4_HMAC_MD5
)) {
382 key
.salt
= NULL
; /* No salt for this enc type */
384 ret
= krb5_keyblock_init(context
,
385 ENCTYPE_ARCFOUR_HMAC
,
386 hash
->hash
, sizeof(hash
->hash
),
392 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
393 entry_ex
->entry
.keys
.len
++;
397 for (i
=0; i
< pkb4
->num_keys
; i
++) {
400 if (!pkb4
->keys
[i
].value
) continue;
402 if (!(kerberos_enctype_to_bitmap(pkb4
->keys
[i
].keytype
) & supported_enctypes
)) {
409 if (pkb4
->salt
.string
) {
412 salt
= data_blob_string_const(pkb4
->salt
.string
);
414 key
.salt
= calloc(1, sizeof(*key
.salt
));
415 if (key
.salt
== NULL
) {
420 key
.salt
->type
= hdb_pw_salt
;
422 ret
= krb5_data_copy(&key
.salt
->salt
, salt
.data
, salt
.length
);
430 /* TODO: maybe pass the iteration_count somehow... */
432 ret
= krb5_keyblock_init(context
,
433 pkb4
->keys
[i
].keytype
,
434 pkb4
->keys
[i
].value
->data
,
435 pkb4
->keys
[i
].value
->length
,
437 if (ret
== KRB5_PROG_ETYPE_NOSUPP
) {
438 DEBUG(2,("Unsupported keytype ignored - type %u\n",
439 pkb4
->keys
[i
].keytype
));
452 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
453 entry_ex
->entry
.keys
.len
++;
456 for (i
=0; i
< pkb3
->num_keys
; i
++) {
459 if (!pkb3
->keys
[i
].value
) continue;
461 if (!(kerberos_enctype_to_bitmap(pkb3
->keys
[i
].keytype
) & supported_enctypes
)) {
468 if (pkb3
->salt
.string
) {
471 salt
= data_blob_string_const(pkb3
->salt
.string
);
473 key
.salt
= calloc(1, sizeof(*key
.salt
));
474 if (key
.salt
== NULL
) {
479 key
.salt
->type
= hdb_pw_salt
;
481 ret
= krb5_data_copy(&key
.salt
->salt
, salt
.data
, salt
.length
);
489 ret
= krb5_keyblock_init(context
,
490 pkb3
->keys
[i
].keytype
,
491 pkb3
->keys
[i
].value
->data
,
492 pkb3
->keys
[i
].value
->length
,
503 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
504 entry_ex
->entry
.keys
.len
++;
510 entry_ex
->entry
.keys
.len
= 0;
512 if (entry_ex
->entry
.keys
.len
== 0 && entry_ex
->entry
.keys
.val
) {
513 free(entry_ex
->entry
.keys
.val
);
514 entry_ex
->entry
.keys
.val
= NULL
;
520 * Construct an hdb_entry from a directory entry.
522 static krb5_error_code
samba_kdc_message2entry(krb5_context context
,
523 struct samba_kdc_db_context
*kdc_db_ctx
,
524 TALLOC_CTX
*mem_ctx
, krb5_const_principal principal
,
525 enum samba_kdc_ent_type ent_type
,
527 struct ldb_dn
*realm_dn
,
528 struct ldb_message
*msg
,
529 hdb_entry_ex
*entry_ex
)
531 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
532 uint32_t userAccountControl
;
534 krb5_error_code ret
= 0;
535 krb5_boolean is_computer
= FALSE
;
537 struct samba_kdc_entry
*p
;
542 bool is_rodc
= false;
543 struct ldb_message_element
*objectclasses
;
544 struct ldb_val computer_val
;
545 const char *samAccountName
= ldb_msg_find_attr_as_string(msg
, "samAccountName", NULL
);
546 computer_val
.data
= discard_const_p(uint8_t,"computer");
547 computer_val
.length
= strlen((const char *)computer_val
.data
);
549 if (ldb_msg_find_element(msg
, "msDS-SecondaryKrbTgtNumber")) {
553 if (!samAccountName
) {
555 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry: no samAccountName present");
559 objectclasses
= ldb_msg_find_element(msg
, "objectClass");
561 if (objectclasses
&& ldb_msg_find_val(objectclasses
, &computer_val
)) {
565 memset(entry_ex
, 0, sizeof(*entry_ex
));
567 p
= talloc(mem_ctx
, struct samba_kdc_entry
);
573 p
->kdc_db_ctx
= kdc_db_ctx
;
574 p
->entry_ex
= entry_ex
;
575 p
->realm_dn
= talloc_reference(p
, realm_dn
);
581 talloc_set_destructor(p
, samba_kdc_entry_destructor
);
583 /* make sure we do not have bogus data in there */
584 memset(&entry_ex
->entry
, 0, sizeof(hdb_entry
));
587 entry_ex
->free_entry
= samba_kdc_free_entry
;
589 userAccountControl
= ldb_msg_find_attr_as_uint(msg
, "userAccountControl", 0);
592 entry_ex
->entry
.principal
= malloc(sizeof(*(entry_ex
->entry
.principal
)));
593 if (ent_type
== SAMBA_KDC_ENT_TYPE_ANY
&& principal
== NULL
) {
594 krb5_make_principal(context
, &entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
), samAccountName
, NULL
);
596 ret
= copy_Principal(principal
, entry_ex
->entry
.principal
);
598 krb5_clear_error_message(context
);
602 /* While we have copied the client principal, tests
603 * show that Win2k3 returns the 'corrected' realm, not
604 * the client-specified realm. This code attempts to
605 * replace the client principal's realm with the one
606 * we determine from our records */
608 /* this has to be with malloc() */
609 krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
));
612 /* First try and figure out the flags based on the userAccountControl */
613 entry_ex
->entry
.flags
= uf2HDBFlags(context
, userAccountControl
, ent_type
);
615 /* Windows 2008 seems to enforce this (very sensible) rule by
616 * default - don't allow offline attacks on a user's password
617 * by asking for a ticket to them as a service (encrypted with
618 * their probably patheticly insecure password) */
620 if (entry_ex
->entry
.flags
.server
621 && lpcfg_parm_bool(lp_ctx
, NULL
, "kdc", "require spn for service", true)) {
622 if (!is_computer
&& !ldb_msg_find_attr_as_string(msg
, "servicePrincipalName", NULL
)) {
623 entry_ex
->entry
.flags
.server
= 0;
627 if (flags
& HDB_F_ADMIN_DATA
) {
628 /* These (created_by, modified_by) parts of the entry are not relevant for Samba4's use
629 * of the Heimdal KDC. They are stored in a the traditional
630 * DB for audit purposes, and still form part of the structure
633 /* use 'whenCreated' */
634 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
635 /* use 'kadmin' for now (needed by mit_samba) */
636 krb5_make_principal(context
,
637 &entry_ex
->entry
.created_by
.principal
,
638 lpcfg_realm(lp_ctx
), "kadmin", NULL
);
640 entry_ex
->entry
.modified_by
= (Event
*) malloc(sizeof(Event
));
641 if (entry_ex
->entry
.modified_by
== NULL
) {
643 krb5_set_error_message(context
, ret
, "malloc: out of memory");
647 /* use 'whenChanged' */
648 entry_ex
->entry
.modified_by
->time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenChanged", 0);
649 /* use 'kadmin' for now (needed by mit_samba) */
650 krb5_make_principal(context
,
651 &entry_ex
->entry
.modified_by
->principal
,
652 lpcfg_realm(lp_ctx
), "kadmin", NULL
);
656 /* The lack of password controls etc applies to krbtgt by
657 * virtue of being that particular RID */
658 status
= dom_sid_split_rid(NULL
, samdb_result_dom_sid(mem_ctx
, msg
, "objectSid"), NULL
, &rid
);
660 if (!NT_STATUS_IS_OK(status
)) {
665 if (rid
== DOMAIN_RID_KRBTGT
) {
666 entry_ex
->entry
.valid_end
= NULL
;
667 entry_ex
->entry
.pw_end
= NULL
;
669 entry_ex
->entry
.flags
.invalid
= 0;
670 entry_ex
->entry
.flags
.server
= 1;
672 /* Don't mark all requests for the krbtgt/realm as
673 * 'change password', as otherwise we could get into
674 * trouble, and not enforce the password expirty.
675 * Instead, only do it when request is for the kpasswd service */
676 if (ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
677 && principal
->name
.name_string
.len
== 2
678 && (strcmp(principal
->name
.name_string
.val
[0], "kadmin") == 0)
679 && (strcmp(principal
->name
.name_string
.val
[1], "changepw") == 0)
680 && lpcfg_is_my_domain_or_realm(lp_ctx
, principal
->realm
)) {
681 entry_ex
->entry
.flags
.change_pw
= 1;
683 entry_ex
->entry
.flags
.client
= 0;
684 entry_ex
->entry
.flags
.forwardable
= 1;
685 entry_ex
->entry
.flags
.ok_as_delegate
= 1;
686 } else if (is_rodc
) {
687 /* The RODC krbtgt account is like the main krbtgt,
688 * but it does not have a changepw or kadmin
691 entry_ex
->entry
.valid_end
= NULL
;
692 entry_ex
->entry
.pw_end
= NULL
;
694 /* Also don't allow the RODC krbtgt to be a client (it should not be needed) */
695 entry_ex
->entry
.flags
.client
= 0;
696 entry_ex
->entry
.flags
.invalid
= 0;
697 entry_ex
->entry
.flags
.server
= 1;
699 entry_ex
->entry
.flags
.client
= 0;
700 entry_ex
->entry
.flags
.forwardable
= 1;
701 entry_ex
->entry
.flags
.ok_as_delegate
= 0;
702 } else if (entry_ex
->entry
.flags
.server
&& ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
) {
703 /* The account/password expiry only applies when the account is used as a
704 * client (ie password login), not when used as a server */
706 /* Make very well sure we don't use this for a client,
707 * it could bypass the password restrictions */
708 entry_ex
->entry
.flags
.client
= 0;
710 entry_ex
->entry
.valid_end
= NULL
;
711 entry_ex
->entry
.pw_end
= NULL
;
714 NTTIME must_change_time
715 = samdb_result_force_password_change(kdc_db_ctx
->samdb
, mem_ctx
,
717 if (must_change_time
== 0x7FFFFFFFFFFFFFFFULL
) {
718 entry_ex
->entry
.pw_end
= NULL
;
720 entry_ex
->entry
.pw_end
= malloc(sizeof(*entry_ex
->entry
.pw_end
));
721 if (entry_ex
->entry
.pw_end
== NULL
) {
725 *entry_ex
->entry
.pw_end
= nt_time_to_unix(must_change_time
);
728 acct_expiry
= samdb_result_account_expires(msg
);
729 if (acct_expiry
== 0x7FFFFFFFFFFFFFFFULL
) {
730 entry_ex
->entry
.valid_end
= NULL
;
732 entry_ex
->entry
.valid_end
= malloc(sizeof(*entry_ex
->entry
.valid_end
));
733 if (entry_ex
->entry
.valid_end
== NULL
) {
737 *entry_ex
->entry
.valid_end
= nt_time_to_unix(acct_expiry
);
741 entry_ex
->entry
.valid_start
= NULL
;
743 entry_ex
->entry
.max_life
= malloc(sizeof(*entry_ex
->entry
.max_life
));
744 if (entry_ex
->entry
.max_life
== NULL
) {
749 if (ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
) {
750 *entry_ex
->entry
.max_life
= nt_time_to_unix(kdc_db_ctx
->policy
.service_tkt_lifetime
);
751 } else if (ent_type
== SAMBA_KDC_ENT_TYPE_KRBTGT
|| ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
) {
752 *entry_ex
->entry
.max_life
= nt_time_to_unix(kdc_db_ctx
->policy
.user_tkt_lifetime
);
754 *entry_ex
->entry
.max_life
= MIN(nt_time_to_unix(kdc_db_ctx
->policy
.service_tkt_lifetime
),
755 nt_time_to_unix(kdc_db_ctx
->policy
.user_tkt_lifetime
));
758 entry_ex
->entry
.max_renew
= malloc(sizeof(*entry_ex
->entry
.max_life
));
759 if (entry_ex
->entry
.max_renew
== NULL
) {
764 *entry_ex
->entry
.max_renew
= nt_time_to_unix(kdc_db_ctx
->policy
.user_tkt_renewaltime
);
766 entry_ex
->entry
.generation
= NULL
;
768 /* Get keys from the db */
769 ret
= samba_kdc_message2entry_keys(context
, kdc_db_ctx
, p
, msg
,
770 rid
, is_rodc
, userAccountControl
,
773 /* Could be bougus data in the entry, or out of memory */
777 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
778 if (entry_ex
->entry
.etypes
== NULL
) {
779 krb5_clear_error_message(context
);
783 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
784 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
785 if (entry_ex
->entry
.etypes
->val
== NULL
) {
786 krb5_clear_error_message(context
);
790 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
791 entry_ex
->entry
.etypes
->val
[i
] = entry_ex
->entry
.keys
.val
[i
].key
.keytype
;
795 p
->msg
= talloc_steal(p
, msg
);
799 /* This doesn't free ent itself, that is for the eventual caller to do */
800 hdb_free_entry(context
, entry_ex
);
802 talloc_steal(kdc_db_ctx
, entry_ex
->ctx
);
809 * Construct an hdb_entry from a directory entry.
811 static krb5_error_code
samba_kdc_trust_message2entry(krb5_context context
,
812 struct samba_kdc_db_context
*kdc_db_ctx
,
813 TALLOC_CTX
*mem_ctx
, krb5_const_principal principal
,
814 enum trust_direction direction
,
815 struct ldb_dn
*realm_dn
,
816 struct ldb_message
*msg
,
817 hdb_entry_ex
*entry_ex
)
819 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
820 const char *dnsdomain
;
821 const char *realm
= lpcfg_realm(lp_ctx
);
822 DATA_BLOB password_utf16
;
823 struct samr_Password password_hash
;
824 const struct ldb_val
*password_val
;
825 struct trustAuthInOutBlob password_blob
;
826 struct samba_kdc_entry
*p
;
828 enum ndr_err_code ndr_err
;
829 int ret
, trust_direction_flags
;
832 p
= talloc(mem_ctx
, struct samba_kdc_entry
);
838 p
->kdc_db_ctx
= kdc_db_ctx
;
839 p
->entry_ex
= entry_ex
;
840 p
->realm_dn
= realm_dn
;
842 talloc_set_destructor(p
, samba_kdc_entry_destructor
);
844 /* make sure we do not have bogus data in there */
845 memset(&entry_ex
->entry
, 0, sizeof(hdb_entry
));
848 entry_ex
->free_entry
= samba_kdc_free_entry
;
850 /* use 'whenCreated' */
851 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
852 /* use 'kadmin' for now (needed by mit_samba) */
853 krb5_make_principal(context
,
854 &entry_ex
->entry
.created_by
.principal
,
855 realm
, "kadmin", NULL
);
857 entry_ex
->entry
.valid_start
= NULL
;
859 trust_direction_flags
= ldb_msg_find_attr_as_int(msg
, "trustDirection", 0);
861 if (direction
== INBOUND
) {
862 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthIncoming");
864 } else { /* OUTBOUND */
865 dnsdomain
= ldb_msg_find_attr_as_string(msg
, "trustPartner", NULL
);
867 realm
= strupper_talloc(mem_ctx
, dnsdomain
);
868 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthOutgoing");
871 if (!password_val
|| !(trust_direction_flags
& direction
)) {
876 ndr_err
= ndr_pull_struct_blob(password_val
, mem_ctx
, &password_blob
,
877 (ndr_pull_flags_fn_t
)ndr_pull_trustAuthInOutBlob
);
878 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
883 entry_ex
->entry
.kvno
= -1;
884 for (i
=0; i
< password_blob
.count
; i
++) {
885 if (password_blob
.current
.array
[i
].AuthType
== TRUST_AUTH_TYPE_VERSION
) {
886 entry_ex
->entry
.kvno
= password_blob
.current
.array
[i
].AuthInfo
.version
.version
;
890 for (i
=0; i
< password_blob
.count
; i
++) {
891 if (password_blob
.current
.array
[i
].AuthType
== TRUST_AUTH_TYPE_CLEAR
) {
892 password_utf16
= data_blob_const(password_blob
.current
.array
[i
].AuthInfo
.clear
.password
,
893 password_blob
.current
.array
[i
].AuthInfo
.clear
.size
);
894 /* In the future, generate all sorts of
895 * hashes, but for now we can't safely convert
896 * the random strings windows uses into
899 /* but as it is utf16 already, we can get the NT password/arcfour-hmac-md5 key */
900 mdfour(password_hash
.hash
, password_utf16
.data
, password_utf16
.length
);
902 } else if (password_blob
.current
.array
[i
].AuthType
== TRUST_AUTH_TYPE_NT4OWF
) {
903 password_hash
= password_blob
.current
.array
[i
].AuthInfo
.nt4owf
.password
;
908 if (i
< password_blob
.count
) {
910 /* Must have found a cleartext or MD4 password */
911 entry_ex
->entry
.keys
.val
= calloc(1, sizeof(Key
));
914 key
.salt
= NULL
; /* No salt for this enc type */
916 if (entry_ex
->entry
.keys
.val
== NULL
) {
921 ret
= krb5_keyblock_init(context
,
922 ENCTYPE_ARCFOUR_HMAC
,
923 password_hash
.hash
, sizeof(password_hash
.hash
),
926 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
927 entry_ex
->entry
.keys
.len
++;
930 entry_ex
->entry
.principal
= malloc(sizeof(*(entry_ex
->entry
.principal
)));
932 ret
= copy_Principal(principal
, entry_ex
->entry
.principal
);
934 krb5_clear_error_message(context
);
938 /* While we have copied the client principal, tests
939 * show that Win2k3 returns the 'corrected' realm, not
940 * the client-specified realm. This code attempts to
941 * replace the client principal's realm with the one
942 * we determine from our records */
944 krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, realm
);
945 entry_ex
->entry
.flags
= int2HDBFlags(0);
946 entry_ex
->entry
.flags
.immutable
= 1;
947 entry_ex
->entry
.flags
.invalid
= 0;
948 entry_ex
->entry
.flags
.server
= 1;
949 entry_ex
->entry
.flags
.require_preauth
= 1;
951 entry_ex
->entry
.pw_end
= NULL
;
953 entry_ex
->entry
.max_life
= NULL
;
955 entry_ex
->entry
.max_renew
= NULL
;
957 entry_ex
->entry
.generation
= NULL
;
959 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
960 if (entry_ex
->entry
.etypes
== NULL
) {
961 krb5_clear_error_message(context
);
965 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
966 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
967 if (entry_ex
->entry
.etypes
->val
== NULL
) {
968 krb5_clear_error_message(context
);
972 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
973 entry_ex
->entry
.etypes
->val
[i
] = entry_ex
->entry
.keys
.val
[i
].key
.keytype
;
977 p
->msg
= talloc_steal(p
, msg
);
981 /* This doesn't free ent itself, that is for the eventual caller to do */
982 hdb_free_entry(context
, entry_ex
);
984 talloc_steal(kdc_db_ctx
, entry_ex
->ctx
);
991 static krb5_error_code
samba_kdc_lookup_trust(krb5_context context
, struct ldb_context
*ldb_ctx
,
994 struct ldb_dn
*realm_dn
,
995 struct ldb_message
**pmsg
)
1000 const char * const *attrs
= trust_attrs
;
1002 struct ldb_result
*res
= NULL
;
1003 filter
= talloc_asprintf(mem_ctx
, "(&(objectClass=trustedDomain)(|(flatname=%s)(trustPartner=%s)))", realm
, realm
);
1007 krb5_set_error_message(context
, ret
, "talloc_asprintf: out of memory");
1011 lret
= ldb_search(ldb_ctx
, mem_ctx
, &res
,
1012 ldb_get_default_basedn(ldb_ctx
),
1013 LDB_SCOPE_SUBTREE
, attrs
, "%s", filter
);
1014 if (lret
!= LDB_SUCCESS
) {
1015 DEBUG(3, ("Failed to search for %s: %s\n", filter
, ldb_errstring(ldb_ctx
)));
1016 return HDB_ERR_NOENTRY
;
1017 } else if (res
->count
== 0 || res
->count
> 1) {
1018 DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter
, res
->count
));
1020 return HDB_ERR_NOENTRY
;
1022 talloc_steal(mem_ctx
, res
->msgs
);
1023 *pmsg
= res
->msgs
[0];
1028 static krb5_error_code
samba_kdc_lookup_client(krb5_context context
,
1029 struct samba_kdc_db_context
*kdc_db_ctx
,
1030 TALLOC_CTX
*mem_ctx
,
1031 krb5_const_principal principal
,
1033 struct ldb_dn
**realm_dn
,
1034 struct ldb_message
**msg
) {
1036 char *principal_string
;
1037 krb5_error_code ret
;
1039 ret
= krb5_unparse_name(context
, principal
, &principal_string
);
1045 nt_status
= sam_get_results_principal(kdc_db_ctx
->samdb
,
1046 mem_ctx
, principal_string
, attrs
,
1048 free(principal_string
);
1049 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_SUCH_USER
)) {
1050 return HDB_ERR_NOENTRY
;
1051 } else if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_MEMORY
)) {
1053 } else if (!NT_STATUS_IS_OK(nt_status
)) {
1060 static krb5_error_code
samba_kdc_fetch_client(krb5_context context
,
1061 struct samba_kdc_db_context
*kdc_db_ctx
,
1062 TALLOC_CTX
*mem_ctx
,
1063 krb5_const_principal principal
,
1065 hdb_entry_ex
*entry_ex
) {
1066 struct ldb_dn
*realm_dn
;
1067 krb5_error_code ret
;
1068 struct ldb_message
*msg
= NULL
;
1070 ret
= samba_kdc_lookup_client(context
, kdc_db_ctx
,
1071 mem_ctx
, principal
, user_attrs
,
1077 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1078 principal
, SAMBA_KDC_ENT_TYPE_CLIENT
,
1080 realm_dn
, msg
, entry_ex
);
1084 static krb5_error_code
samba_kdc_fetch_krbtgt(krb5_context context
,
1085 struct samba_kdc_db_context
*kdc_db_ctx
,
1086 TALLOC_CTX
*mem_ctx
,
1087 krb5_const_principal principal
,
1089 uint32_t krbtgt_number
,
1090 hdb_entry_ex
*entry_ex
)
1092 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
1093 krb5_error_code ret
;
1094 struct ldb_message
*msg
= NULL
;
1095 struct ldb_dn
*realm_dn
= ldb_get_default_basedn(kdc_db_ctx
->samdb
);
1097 krb5_principal alloc_principal
= NULL
;
1098 if (principal
->name
.name_string
.len
!= 2
1099 || (strcmp(principal
->name
.name_string
.val
[0], KRB5_TGS_NAME
) != 0)) {
1101 return HDB_ERR_NOENTRY
;
1104 /* krbtgt case. Either us or a trusted realm */
1106 if (lpcfg_is_my_domain_or_realm(lp_ctx
, principal
->realm
)
1107 && lpcfg_is_my_domain_or_realm(lp_ctx
, principal
->name
.name_string
.val
[1])) {
1108 /* us, or someone quite like us */
1109 /* Cludge, cludge cludge. If the realm part of krbtgt/realm,
1110 * is in our db, then direct the caller at our primary
1115 if (krbtgt_number
== kdc_db_ctx
->my_krbtgt_number
) {
1116 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
,
1117 &msg
, kdc_db_ctx
->krbtgt_dn
, LDB_SCOPE_BASE
,
1119 "(objectClass=user)");
1121 /* We need to look up an RODC krbtgt (perhaps
1122 * ours, if we are an RODC, perhaps another
1123 * RODC if we are a read-write DC */
1124 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
,
1125 &msg
, realm_dn
, LDB_SCOPE_SUBTREE
,
1127 DSDB_SEARCH_SHOW_EXTENDED_DN
,
1128 "(&(objectClass=user)(msDS-SecondaryKrbTgtNumber=%u))", (unsigned)(krbtgt_number
));
1131 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1132 krb5_warnx(context
, "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1133 (unsigned)(krbtgt_number
));
1134 krb5_set_error_message(context
, HDB_ERR_NOENTRY
,
1135 "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1136 (unsigned)(krbtgt_number
));
1137 return HDB_ERR_NOENTRY
;
1138 } else if (lret
!= LDB_SUCCESS
) {
1139 krb5_warnx(context
, "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1140 (unsigned)(krbtgt_number
));
1141 krb5_set_error_message(context
, HDB_ERR_NOENTRY
,
1142 "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1143 (unsigned)(krbtgt_number
));
1144 return HDB_ERR_NOENTRY
;
1147 if (flags
& HDB_F_CANON
) {
1148 ret
= krb5_copy_principal(context
, principal
, &alloc_principal
);
1153 /* When requested to do so, ensure that the
1154 * both realm values in the principal are set
1155 * to the upper case, canonical realm */
1156 free(alloc_principal
->name
.name_string
.val
[1]);
1157 alloc_principal
->name
.name_string
.val
[1] = strdup(lpcfg_realm(lp_ctx
));
1158 if (!alloc_principal
->name
.name_string
.val
[1]) {
1160 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: strdup() failed!");
1163 principal
= alloc_principal
;
1166 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1167 principal
, SAMBA_KDC_ENT_TYPE_KRBTGT
,
1168 flags
, realm_dn
, msg
, entry_ex
);
1169 if (flags
& HDB_F_CANON
) {
1170 /* This is again copied in the message2entry call */
1171 krb5_free_principal(context
, alloc_principal
);
1174 krb5_warnx(context
, "samba_kdc_fetch: self krbtgt message2entry failed");
1179 enum trust_direction direction
= UNKNOWN
;
1180 const char *realm
= NULL
;
1182 /* Either an inbound or outbound trust */
1184 if (strcasecmp(lpcfg_realm(lp_ctx
), principal
->realm
) == 0) {
1185 /* look for inbound trust */
1186 direction
= INBOUND
;
1187 realm
= principal
->name
.name_string
.val
[1];
1188 } else if (strcasecmp(lpcfg_realm(lp_ctx
), principal
->name
.name_string
.val
[1]) == 0) {
1189 /* look for outbound trust */
1190 direction
= OUTBOUND
;
1191 realm
= principal
->realm
;
1193 krb5_warnx(context
, "samba_kdc_fetch: not our realm for trusts ('%s', '%s')",
1194 principal
->realm
, principal
->name
.name_string
.val
[1]);
1195 krb5_set_error_message(context
, HDB_ERR_NOENTRY
, "samba_kdc_fetch: not our realm for trusts ('%s', '%s')",
1196 principal
->realm
, principal
->name
.name_string
.val
[1]);
1197 return HDB_ERR_NOENTRY
;
1200 /* Trusted domains are under CN=system */
1202 ret
= samba_kdc_lookup_trust(context
, kdc_db_ctx
->samdb
,
1204 realm
, realm_dn
, &msg
);
1207 krb5_warnx(context
, "samba_kdc_fetch: could not find principal in DB");
1208 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: could not find principal in DB");
1212 ret
= samba_kdc_trust_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1213 principal
, direction
,
1214 realm_dn
, msg
, entry_ex
);
1216 krb5_warnx(context
, "samba_kdc_fetch: trust_message2entry failed");
1223 static krb5_error_code
samba_kdc_lookup_server(krb5_context context
,
1224 struct samba_kdc_db_context
*kdc_db_ctx
,
1225 TALLOC_CTX
*mem_ctx
,
1226 krb5_const_principal principal
,
1228 struct ldb_dn
**realm_dn
,
1229 struct ldb_message
**msg
)
1231 krb5_error_code ret
;
1232 if (principal
->name
.name_string
.len
>= 2) {
1233 /* 'normal server' case */
1236 struct ldb_dn
*user_dn
;
1237 char *principal_string
;
1239 ret
= krb5_unparse_name_flags(context
, principal
,
1240 KRB5_PRINCIPAL_UNPARSE_NO_REALM
,
1246 /* At this point we may find the host is known to be
1247 * in a different realm, so we should generate a
1248 * referral instead */
1249 nt_status
= crack_service_principal_name(kdc_db_ctx
->samdb
,
1250 mem_ctx
, principal_string
,
1251 &user_dn
, realm_dn
);
1252 free(principal_string
);
1254 if (!NT_STATUS_IS_OK(nt_status
)) {
1255 return HDB_ERR_NOENTRY
;
1258 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
,
1260 msg
, user_dn
, LDB_SCOPE_BASE
,
1261 attrs
, DSDB_SEARCH_SHOW_EXTENDED_DN
, "(objectClass=*)");
1262 if (ldb_ret
!= LDB_SUCCESS
) {
1263 return HDB_ERR_NOENTRY
;
1268 char *filter
= NULL
;
1271 /* server as client principal case, but we must not lookup userPrincipalNames */
1272 *realm_dn
= ldb_get_default_basedn(kdc_db_ctx
->samdb
);
1273 realm
= krb5_principal_get_realm(context
, principal
);
1275 /* TODO: Check if it is our realm, otherwise give referall */
1277 ret
= krb5_unparse_name_flags(context
, principal
, KRB5_PRINCIPAL_UNPARSE_NO_REALM
, &short_princ
);
1280 krb5_set_error_message(context
, ret
, "samba_kdc_lookup_principal: could not parse principal");
1281 krb5_warnx(context
, "samba_kdc_lookup_principal: could not parse principal");
1285 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
, msg
,
1286 *realm_dn
, LDB_SCOPE_SUBTREE
,
1288 DSDB_SEARCH_SHOW_EXTENDED_DN
,
1289 "(&(objectClass=user)(samAccountName=%s))",
1290 ldb_binary_encode_string(mem_ctx
, short_princ
));
1292 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1293 DEBUG(3, ("Failed find a entry for %s\n", filter
));
1294 return HDB_ERR_NOENTRY
;
1296 if (lret
!= LDB_SUCCESS
) {
1297 DEBUG(3, ("Failed single search for for %s - %s\n",
1298 filter
, ldb_errstring(kdc_db_ctx
->samdb
)));
1299 return HDB_ERR_NOENTRY
;
1306 static krb5_error_code
samba_kdc_fetch_server(krb5_context context
,
1307 struct samba_kdc_db_context
*kdc_db_ctx
,
1308 TALLOC_CTX
*mem_ctx
,
1309 krb5_const_principal principal
,
1311 hdb_entry_ex
*entry_ex
)
1313 krb5_error_code ret
;
1314 struct ldb_dn
*realm_dn
;
1315 struct ldb_message
*msg
;
1317 ret
= samba_kdc_lookup_server(context
, kdc_db_ctx
, mem_ctx
, principal
,
1318 server_attrs
, &realm_dn
, &msg
);
1323 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1324 principal
, SAMBA_KDC_ENT_TYPE_SERVER
,
1326 realm_dn
, msg
, entry_ex
);
1328 krb5_warnx(context
, "samba_kdc_fetch: message2entry failed");
1334 krb5_error_code
samba_kdc_fetch(krb5_context context
,
1335 struct samba_kdc_db_context
*kdc_db_ctx
,
1336 krb5_const_principal principal
,
1339 hdb_entry_ex
*entry_ex
)
1341 krb5_error_code ret
= HDB_ERR_NOENTRY
;
1342 TALLOC_CTX
*mem_ctx
;
1343 unsigned int krbtgt_number
;
1344 if (flags
& HDB_F_KVNO_SPECIFIED
) {
1345 krbtgt_number
= SAMBA_KVNO_GET_KRBTGT(kvno
);
1346 if (kdc_db_ctx
->rodc
) {
1347 if (krbtgt_number
!= kdc_db_ctx
->my_krbtgt_number
) {
1348 return HDB_ERR_NOT_FOUND_HERE
;
1352 krbtgt_number
= kdc_db_ctx
->my_krbtgt_number
;
1355 mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_fetch context");
1358 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: talloc_named() failed!");
1362 if (flags
& HDB_F_GET_CLIENT
) {
1363 ret
= samba_kdc_fetch_client(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1364 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1366 if (flags
& HDB_F_GET_SERVER
) {
1367 /* krbtgt fits into this situation for trusted realms, and for resolving different versions of our own realm name */
1368 ret
= samba_kdc_fetch_krbtgt(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, krbtgt_number
, entry_ex
);
1369 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1371 /* We return 'no entry' if it does not start with krbtgt/, so move to the common case quickly */
1372 ret
= samba_kdc_fetch_server(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1373 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1375 if (flags
& HDB_F_GET_KRBTGT
) {
1376 ret
= samba_kdc_fetch_krbtgt(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, krbtgt_number
, entry_ex
);
1377 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1381 talloc_free(mem_ctx
);
1385 struct samba_kdc_seq
{
1388 struct ldb_message
**msgs
;
1389 struct ldb_dn
*realm_dn
;
1392 static krb5_error_code
samba_kdc_seq(krb5_context context
,
1393 struct samba_kdc_db_context
*kdc_db_ctx
,
1394 hdb_entry_ex
*entry
)
1396 krb5_error_code ret
;
1397 struct samba_kdc_seq
*priv
= kdc_db_ctx
->seq_ctx
;
1398 TALLOC_CTX
*mem_ctx
;
1399 hdb_entry_ex entry_ex
;
1400 memset(&entry_ex
, '\0', sizeof(entry_ex
));
1403 return HDB_ERR_NOENTRY
;
1406 mem_ctx
= talloc_named(priv
, 0, "samba_kdc_seq context");
1410 krb5_set_error_message(context
, ret
, "samba_kdc_seq: talloc_named() failed!");
1414 if (priv
->index
< priv
->count
) {
1415 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1416 NULL
, SAMBA_KDC_ENT_TYPE_ANY
,
1417 HDB_F_ADMIN_DATA
|HDB_F_GET_ANY
,
1418 priv
->realm_dn
, priv
->msgs
[priv
->index
++], entry
);
1420 ret
= HDB_ERR_NOENTRY
;
1425 kdc_db_ctx
->seq_ctx
= NULL
;
1427 talloc_free(mem_ctx
);
1433 krb5_error_code
samba_kdc_firstkey(krb5_context context
,
1434 struct samba_kdc_db_context
*kdc_db_ctx
,
1435 hdb_entry_ex
*entry
)
1437 struct ldb_context
*ldb_ctx
= kdc_db_ctx
->samdb
;
1438 struct samba_kdc_seq
*priv
= kdc_db_ctx
->seq_ctx
;
1440 struct ldb_result
*res
= NULL
;
1441 krb5_error_code ret
;
1442 TALLOC_CTX
*mem_ctx
;
1447 kdc_db_ctx
->seq_ctx
= NULL
;
1450 priv
= (struct samba_kdc_seq
*) talloc(kdc_db_ctx
, struct samba_kdc_seq
);
1453 krb5_set_error_message(context
, ret
, "talloc: out of memory");
1459 priv
->realm_dn
= ldb_get_default_basedn(ldb_ctx
);
1462 mem_ctx
= talloc_named(priv
, 0, "samba_kdc_firstkey context");
1466 krb5_set_error_message(context
, ret
, "samba_kdc_firstkey: talloc_named() failed!");
1470 ret
= krb5_get_default_realm(context
, &realm
);
1476 lret
= ldb_search(ldb_ctx
, priv
, &res
,
1477 priv
->realm_dn
, LDB_SCOPE_SUBTREE
, user_attrs
,
1478 "(objectClass=user)");
1480 if (lret
!= LDB_SUCCESS
) {
1482 return HDB_ERR_NOENTRY
;
1485 priv
->count
= res
->count
;
1486 priv
->msgs
= talloc_steal(priv
, res
->msgs
);
1489 kdc_db_ctx
->seq_ctx
= priv
;
1491 ret
= samba_kdc_seq(context
, kdc_db_ctx
, entry
);
1495 kdc_db_ctx
->seq_ctx
= NULL
;
1497 talloc_free(mem_ctx
);
1502 krb5_error_code
samba_kdc_nextkey(krb5_context context
,
1503 struct samba_kdc_db_context
*kdc_db_ctx
,
1504 hdb_entry_ex
*entry
)
1506 return samba_kdc_seq(context
, kdc_db_ctx
, entry
);
1509 /* Check if a given entry may delegate or do s4u2self to this target principal
1511 * This is currently a very nasty hack - allowing only delegation to itself.
1513 * This is shared between the constrained delegation and S4U2Self code.
1516 samba_kdc_check_identical_client_and_server(krb5_context context
,
1517 struct samba_kdc_db_context
*kdc_db_ctx
,
1518 hdb_entry_ex
*entry
,
1519 krb5_const_principal target_principal
)
1521 krb5_error_code ret
;
1522 krb5_principal enterprise_prinicpal
= NULL
;
1523 struct ldb_dn
*realm_dn
;
1524 struct ldb_message
*msg
;
1525 struct dom_sid
*orig_sid
;
1526 struct dom_sid
*target_sid
;
1527 struct samba_kdc_entry
*p
= talloc_get_type(entry
->ctx
, struct samba_kdc_entry
);
1528 const char *delegation_check_attrs
[] = {
1532 TALLOC_CTX
*mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_check_constrained_delegation");
1536 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: talloc_named() failed!");
1540 if (target_principal
->name
.name_type
== KRB5_NT_ENTERPRISE_PRINCIPAL
) {
1541 /* Need to reparse the enterprise principal to find the real target */
1542 if (target_principal
->name
.name_string
.len
!= 1) {
1543 ret
= KRB5_PARSE_MALFORMED
;
1544 krb5_set_error_message(context
, ret
, "samba_kdc_check_constrained_delegation: request for delegation to enterprise principal with wrong (%d) number of components",
1545 target_principal
->name
.name_string
.len
);
1546 talloc_free(mem_ctx
);
1549 ret
= krb5_parse_name(context
, target_principal
->name
.name_string
.val
[0],
1550 &enterprise_prinicpal
);
1552 talloc_free(mem_ctx
);
1555 target_principal
= enterprise_prinicpal
;
1558 ret
= samba_kdc_lookup_server(context
, kdc_db_ctx
, mem_ctx
, target_principal
,
1559 delegation_check_attrs
, &realm_dn
, &msg
);
1561 krb5_free_principal(context
, enterprise_prinicpal
);
1564 talloc_free(mem_ctx
);
1568 orig_sid
= samdb_result_dom_sid(mem_ctx
, p
->msg
, "objectSid");
1569 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
1571 /* Allow delegation to the same principal, even if by a different
1572 * name. The easy and safe way to prove this is by SID
1574 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
1575 talloc_free(mem_ctx
);
1576 return KRB5KDC_ERR_BADOPTION
;
1579 talloc_free(mem_ctx
);
1583 /* Certificates printed by a the Certificate Authority might have a
1584 * slightly different form of the user principal name to that in the
1585 * database. Allow a mismatch where they both refer to the same
1589 samba_kdc_check_pkinit_ms_upn_match(krb5_context context
,
1590 struct samba_kdc_db_context
*kdc_db_ctx
,
1591 hdb_entry_ex
*entry
,
1592 krb5_const_principal certificate_principal
)
1594 krb5_error_code ret
;
1595 struct ldb_dn
*realm_dn
;
1596 struct ldb_message
*msg
;
1597 struct dom_sid
*orig_sid
;
1598 struct dom_sid
*target_sid
;
1599 struct samba_kdc_entry
*p
= talloc_get_type(entry
->ctx
, struct samba_kdc_entry
);
1600 const char *ms_upn_check_attrs
[] = {
1604 TALLOC_CTX
*mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_check_pkinit_ms_upn_match");
1608 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: talloc_named() failed!");
1612 ret
= samba_kdc_lookup_client(context
, kdc_db_ctx
,
1613 mem_ctx
, certificate_principal
,
1614 ms_upn_check_attrs
, &realm_dn
, &msg
);
1617 talloc_free(mem_ctx
);
1621 orig_sid
= samdb_result_dom_sid(mem_ctx
, p
->msg
, "objectSid");
1622 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
1624 /* Consider these to be the same principal, even if by a different
1625 * name. The easy and safe way to prove this is by SID
1627 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
1628 talloc_free(mem_ctx
);
1629 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
1632 talloc_free(mem_ctx
);
1636 NTSTATUS
samba_kdc_setup_db_ctx(TALLOC_CTX
*mem_ctx
, struct samba_kdc_base_context
*base_ctx
,
1637 struct samba_kdc_db_context
**kdc_db_ctx_out
)
1640 struct ldb_message
*msg
;
1641 struct auth_session_info
*session_info
;
1642 struct samba_kdc_db_context
*kdc_db_ctx
;
1643 /* The idea here is very simple. Using Kerberos to
1644 * authenticate the KDC to the LDAP server is higly likely to
1647 * In future we may set this up to use EXERNAL and SSL
1648 * certificates, for now it will almost certainly be NTLMSSP_SET_USERNAME
1651 kdc_db_ctx
= talloc_zero(mem_ctx
, struct samba_kdc_db_context
);
1652 if (kdc_db_ctx
== NULL
) {
1653 return NT_STATUS_NO_MEMORY
;
1655 kdc_db_ctx
->ev_ctx
= base_ctx
->ev_ctx
;
1656 kdc_db_ctx
->lp_ctx
= base_ctx
->lp_ctx
;
1658 kdc_get_policy(base_ctx
->lp_ctx
, NULL
, &kdc_db_ctx
->policy
);
1660 session_info
= system_session(kdc_db_ctx
->lp_ctx
);
1661 if (session_info
== NULL
) {
1662 return NT_STATUS_INTERNAL_ERROR
;
1665 /* Setup the link to LDB */
1666 kdc_db_ctx
->samdb
= samdb_connect(kdc_db_ctx
, base_ctx
->ev_ctx
,
1667 base_ctx
->lp_ctx
, session_info
, 0);
1668 if (kdc_db_ctx
->samdb
== NULL
) {
1669 DEBUG(1, ("hdb_samba4_create: Cannot open samdb for KDC backend!"));
1670 talloc_free(kdc_db_ctx
);
1671 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1674 /* Find out our own krbtgt kvno */
1675 ldb_ret
= samdb_rodc(kdc_db_ctx
->samdb
, &kdc_db_ctx
->rodc
);
1676 if (ldb_ret
!= LDB_SUCCESS
) {
1677 DEBUG(1, ("hdb_samba4_create: Cannot determine if we are an RODC in KDC backend: %s\n",
1678 ldb_errstring(kdc_db_ctx
->samdb
)));
1679 talloc_free(kdc_db_ctx
);
1680 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1682 if (kdc_db_ctx
->rodc
) {
1683 int my_krbtgt_number
;
1684 const char *secondary_keytab
[] = { "msDS-SecondaryKrbTgtNumber", NULL
};
1685 struct ldb_dn
*account_dn
;
1686 struct ldb_dn
*server_dn
= samdb_server_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
);
1688 DEBUG(1, ("hdb_samba4_create: Cannot determine server DN in KDC backend: %s\n",
1689 ldb_errstring(kdc_db_ctx
->samdb
)));
1690 talloc_free(kdc_db_ctx
);
1691 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1694 ldb_ret
= samdb_reference_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
, server_dn
,
1695 "serverReference", &account_dn
);
1696 if (ldb_ret
!= LDB_SUCCESS
) {
1697 DEBUG(1, ("hdb_samba4_create: Cannot determine server account in KDC backend: %s\n",
1698 ldb_errstring(kdc_db_ctx
->samdb
)));
1699 talloc_free(kdc_db_ctx
);
1700 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1703 ldb_ret
= samdb_reference_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
, account_dn
,
1704 "msDS-KrbTgtLink", &kdc_db_ctx
->krbtgt_dn
);
1705 talloc_free(account_dn
);
1706 if (ldb_ret
!= LDB_SUCCESS
) {
1707 DEBUG(1, ("hdb_samba4_create: Cannot determine RODC krbtgt account in KDC backend: %s\n",
1708 ldb_errstring(kdc_db_ctx
->samdb
)));
1709 talloc_free(kdc_db_ctx
);
1710 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1713 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
, kdc_db_ctx
,
1714 &msg
, kdc_db_ctx
->krbtgt_dn
, LDB_SCOPE_BASE
,
1717 "(&(objectClass=user)(msDS-SecondaryKrbTgtNumber=*))");
1718 if (ldb_ret
!= LDB_SUCCESS
) {
1719 DEBUG(1, ("hdb_samba4_create: Cannot read krbtgt account %s in KDC backend to get msDS-SecondaryKrbTgtNumber: %s: %s\n",
1720 ldb_dn_get_linearized(kdc_db_ctx
->krbtgt_dn
),
1721 ldb_errstring(kdc_db_ctx
->samdb
),
1722 ldb_strerror(ldb_ret
)));
1723 talloc_free(kdc_db_ctx
);
1724 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1726 my_krbtgt_number
= ldb_msg_find_attr_as_int(msg
, "msDS-SecondaryKrbTgtNumber", -1);
1727 if (my_krbtgt_number
== -1) {
1728 DEBUG(1, ("hdb_samba4_create: Cannot read msDS-SecondaryKrbTgtNumber from krbtgt account %s in KDC backend: got %d\n",
1729 ldb_dn_get_linearized(kdc_db_ctx
->krbtgt_dn
),
1731 talloc_free(kdc_db_ctx
);
1732 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1734 kdc_db_ctx
->my_krbtgt_number
= my_krbtgt_number
;
1737 kdc_db_ctx
->my_krbtgt_number
= 0;
1738 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
, kdc_db_ctx
,
1739 &msg
, NULL
, LDB_SCOPE_SUBTREE
,
1742 "(&(objectClass=user)(samAccountName=krbtgt))");
1744 if (ldb_ret
!= LDB_SUCCESS
) {
1745 DEBUG(1, ("samba_kdc_fetch: could not find own KRBTGT in DB: %s\n", ldb_errstring(kdc_db_ctx
->samdb
)));
1746 talloc_free(kdc_db_ctx
);
1747 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
1749 kdc_db_ctx
->krbtgt_dn
= talloc_steal(kdc_db_ctx
, msg
->dn
);
1750 kdc_db_ctx
->my_krbtgt_number
= 0;
1753 *kdc_db_ctx_out
= kdc_db_ctx
;
1754 return NT_STATUS_OK
;