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/db-glue.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",
69 static time_t ldb_msg_find_krb5time_ldap_time(struct ldb_message
*msg
, const char *attr
, time_t default_val
)
75 gentime
= ldb_msg_find_attr_as_string(msg
, attr
, NULL
);
79 tmp
= strptime(gentime
, "%Y%m%d%H%M%SZ", &tm
);
87 static HDBFlags
uf2HDBFlags(krb5_context context
, uint32_t userAccountControl
, enum samba_kdc_ent_type ent_type
)
89 HDBFlags flags
= int2HDBFlags(0);
91 /* we don't allow kadmin deletes */
94 /* mark the principal as invalid to start with */
99 /* All accounts are servers, but this may be disabled again in the caller */
102 /* Account types - clear the invalid bit if it turns out to be valid */
103 if (userAccountControl
& UF_NORMAL_ACCOUNT
) {
104 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
110 if (userAccountControl
& UF_INTERDOMAIN_TRUST_ACCOUNT
) {
111 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
116 if (userAccountControl
& UF_WORKSTATION_TRUST_ACCOUNT
) {
117 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
122 if (userAccountControl
& UF_SERVER_TRUST_ACCOUNT
) {
123 if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
|| ent_type
== SAMBA_KDC_ENT_TYPE_ANY
) {
129 /* Not permitted to act as a client if disabled */
130 if (userAccountControl
& UF_ACCOUNTDISABLE
) {
133 if (userAccountControl
& UF_LOCKOUT
) {
134 flags
.locked_out
= 1;
137 if (userAccountControl & UF_PASSWORD_NOTREQD) {
142 UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
144 if (userAccountControl
& UF_TEMP_DUPLICATE_ACCOUNT
) {
148 /* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in samba_kdc_message2entry() */
151 if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
155 if (userAccountControl
& UF_SMARTCARD_REQUIRED
) {
156 flags
.require_hwauth
= 1;
158 if (userAccountControl
& UF_TRUSTED_FOR_DELEGATION
) {
159 flags
.ok_as_delegate
= 1;
161 if (userAccountControl
& UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION
) {
163 * this is confusing...
165 * UF_TRUSTED_FOR_DELEGATION
170 * UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION
171 * => trusted_for_delegation
173 flags
.trusted_for_delegation
= 1;
175 if (!(userAccountControl
& UF_NOT_DELEGATED
)) {
176 flags
.forwardable
= 1;
180 if (userAccountControl
& UF_DONT_REQUIRE_PREAUTH
) {
181 flags
.require_preauth
= 0;
183 flags
.require_preauth
= 1;
189 static int samba_kdc_entry_destructor(struct samba_kdc_entry
*p
)
191 if (p
->entry_ex
!= NULL
) {
192 hdb_entry_ex
*entry_ex
= p
->entry_ex
;
193 free_hdb_entry(&entry_ex
->entry
);
199 static void samba_kdc_free_entry(krb5_context context
, hdb_entry_ex
*entry_ex
)
201 /* this function is called only from hdb_free_entry().
202 * Make sure we neutralize the destructor or we will
203 * get a double free later when hdb_free_entry() will
204 * try to call free_hdb_entry() */
205 talloc_set_destructor(entry_ex
->ctx
, NULL
);
207 /* now proceed to free the talloc part */
208 talloc_free(entry_ex
->ctx
);
211 static krb5_error_code
samba_kdc_message2entry_keys(krb5_context context
,
212 struct samba_kdc_db_context
*kdc_db_ctx
,
214 struct ldb_message
*msg
,
217 uint32_t userAccountControl
,
218 enum samba_kdc_ent_type ent_type
,
219 hdb_entry_ex
*entry_ex
)
221 krb5_error_code ret
= 0;
222 enum ndr_err_code ndr_err
;
223 struct samr_Password
*hash
;
224 const struct ldb_val
*sc_val
;
225 struct supplementalCredentialsBlob scb
;
226 struct supplementalCredentialsPackage
*scpk
= NULL
;
227 bool newer_keys
= false;
228 struct package_PrimaryKerberosBlob _pkb
;
229 struct package_PrimaryKerberosCtr3
*pkb3
= NULL
;
230 struct package_PrimaryKerberosCtr4
*pkb4
= NULL
;
232 uint16_t allocated_keys
= 0;
233 int rodc_krbtgt_number
= 0;
235 uint32_t supported_enctypes
236 = ldb_msg_find_attr_as_uint(msg
,
237 "msDS-SupportedEncryptionTypes",
240 if (rid
== DOMAIN_RID_KRBTGT
|| is_rodc
) {
241 /* KDCs (and KDCs on RODCs) use AES */
242 supported_enctypes
|= ENC_HMAC_SHA1_96_AES128
| ENC_HMAC_SHA1_96_AES256
;
243 } else if (userAccountControl
& (UF_PARTIAL_SECRETS_ACCOUNT
|UF_SERVER_TRUST_ACCOUNT
)) {
244 /* DCs and RODCs comptuer accounts use AES */
245 supported_enctypes
|= ENC_HMAC_SHA1_96_AES128
| ENC_HMAC_SHA1_96_AES256
;
246 } else if (ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
||
247 (ent_type
== SAMBA_KDC_ENT_TYPE_ANY
)) {
248 /* for AS-REQ the client chooses the enc types it
249 * supports, and this will vary between computers a
252 * likewise for 'any' return as much as is supported,
253 * to export into a keytab */
254 supported_enctypes
= ENC_ALL_TYPES
;
257 /* If UF_USE_DES_KEY_ONLY has been set, then don't allow use of the newer enc types */
258 if (userAccountControl
& UF_USE_DES_KEY_ONLY
) {
259 supported_enctypes
= ENC_CRC32
|ENC_RSA_MD5
;
261 /* Otherwise, add in the default enc types */
262 supported_enctypes
|= ENC_CRC32
| ENC_RSA_MD5
| ENC_RC4_HMAC_MD5
;
265 /* Is this the krbtgt or a RODC krbtgt */
267 rodc_krbtgt_number
= ldb_msg_find_attr_as_int(msg
, "msDS-SecondaryKrbTgtNumber", -1);
269 if (rodc_krbtgt_number
== -1) {
274 entry_ex
->entry
.keys
.val
= NULL
;
275 entry_ex
->entry
.keys
.len
= 0;
277 kvno
= ldb_msg_find_attr_as_int(msg
, "msDS-KeyVersionNumber", 0);
279 kvno
= SAMBA_KVNO_AND_KRBTGT(kvno
, rodc_krbtgt_number
);
281 entry_ex
->entry
.kvno
= kvno
;
283 /* Get keys from the db */
285 hash
= samdb_result_hash(mem_ctx
, msg
, "unicodePwd");
286 sc_val
= ldb_msg_find_ldb_val(msg
, "supplementalCredentials");
288 /* unicodePwd for enctype 0x17 (23) if present */
293 /* supplementalCredentials if present */
295 ndr_err
= ndr_pull_struct_blob_all(sc_val
, mem_ctx
, &scb
,
296 (ndr_pull_flags_fn_t
)ndr_pull_supplementalCredentialsBlob
);
297 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
298 dump_data(0, sc_val
->data
, sc_val
->length
);
303 if (scb
.sub
.signature
!= SUPPLEMENTAL_CREDENTIALS_SIGNATURE
) {
304 NDR_PRINT_DEBUG(supplementalCredentialsBlob
, &scb
);
309 for (i
=0; i
< scb
.sub
.num_packages
; i
++) {
310 if (strcmp("Primary:Kerberos-Newer-Keys", scb
.sub
.packages
[i
].name
) == 0) {
311 scpk
= &scb
.sub
.packages
[i
];
312 if (!scpk
->data
|| !scpk
->data
[0]) {
318 } else if (strcmp("Primary:Kerberos", scb
.sub
.packages
[i
].name
) == 0) {
319 scpk
= &scb
.sub
.packages
[i
];
320 if (!scpk
->data
|| !scpk
->data
[0]) {
324 * we don't break here in hope to find
325 * a Kerberos-Newer-Keys package
331 * Primary:Kerberos-Newer-Keys or Primary:Kerberos element
332 * of supplementalCredentials
337 blob
= strhex_to_data_blob(mem_ctx
, scpk
->data
);
343 /* we cannot use ndr_pull_struct_blob_all() here, as w2k and w2k3 add padding bytes */
344 ndr_err
= ndr_pull_struct_blob(&blob
, mem_ctx
, &_pkb
,
345 (ndr_pull_flags_fn_t
)ndr_pull_package_PrimaryKerberosBlob
);
346 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
348 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: could not parse package_PrimaryKerberosBlob");
349 krb5_warnx(context
, "samba_kdc_message2entry_keys: could not parse package_PrimaryKerberosBlob");
353 if (newer_keys
&& _pkb
.version
!= 4) {
355 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
356 krb5_warnx(context
, "samba_kdc_message2entry_keys: Primary:Kerberos-Newer-Keys not version 4");
360 if (!newer_keys
&& _pkb
.version
!= 3) {
362 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry_keys: could not parse Primary:Kerberos not version 3");
363 krb5_warnx(context
, "samba_kdc_message2entry_keys: could not parse Primary:Kerberos not version 3");
367 if (_pkb
.version
== 4) {
368 pkb4
= &_pkb
.ctr
.ctr4
;
369 allocated_keys
+= pkb4
->num_keys
;
370 } else if (_pkb
.version
== 3) {
371 pkb3
= &_pkb
.ctr
.ctr3
;
372 allocated_keys
+= pkb3
->num_keys
;
376 if (allocated_keys
== 0) {
377 if (kdc_db_ctx
->rodc
) {
378 /* We are on an RODC, but don't have keys for this account. Signal this to the caller */
379 /* TODO: We need to call a generalised version of auth_sam_trigger_repl_secret from here */
380 return HDB_ERR_NOT_FOUND_HERE
;
383 /* oh, no password. Apparently (comment in
384 * hdb-ldap.c) this violates the ASN.1, but this
385 * allows an entry with no keys (yet). */
389 /* allocate space to decode into */
390 entry_ex
->entry
.keys
.len
= 0;
391 entry_ex
->entry
.keys
.val
= calloc(allocated_keys
, sizeof(Key
));
392 if (entry_ex
->entry
.keys
.val
== NULL
) {
397 if (hash
&& (supported_enctypes
& ENC_RC4_HMAC_MD5
)) {
401 key
.salt
= NULL
; /* No salt for this enc type */
403 ret
= smb_krb5_keyblock_init_contents(context
,
404 ENCTYPE_ARCFOUR_HMAC
,
412 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
413 entry_ex
->entry
.keys
.len
++;
417 for (i
=0; i
< pkb4
->num_keys
; i
++) {
420 if (!pkb4
->keys
[i
].value
) continue;
422 if (!(kerberos_enctype_to_bitmap(pkb4
->keys
[i
].keytype
) & supported_enctypes
)) {
429 if (pkb4
->salt
.string
) {
432 salt
= data_blob_string_const(pkb4
->salt
.string
);
434 key
.salt
= calloc(1, sizeof(*key
.salt
));
435 if (key
.salt
== NULL
) {
440 key
.salt
->type
= KRB5_PW_SALT
;
442 ret
= krb5_copy_data_contents(&key
.salt
->salt
,
452 /* TODO: maybe pass the iteration_count somehow... */
454 ret
= smb_krb5_keyblock_init_contents(context
,
455 pkb4
->keys
[i
].keytype
,
456 pkb4
->keys
[i
].value
->data
,
457 pkb4
->keys
[i
].value
->length
,
459 if (ret
== KRB5_PROG_ETYPE_NOSUPP
) {
460 DEBUG(2,("Unsupported keytype ignored - type %u\n",
461 pkb4
->keys
[i
].keytype
));
474 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
475 entry_ex
->entry
.keys
.len
++;
478 for (i
=0; i
< pkb3
->num_keys
; i
++) {
481 if (!pkb3
->keys
[i
].value
) continue;
483 if (!(kerberos_enctype_to_bitmap(pkb3
->keys
[i
].keytype
) & supported_enctypes
)) {
490 if (pkb3
->salt
.string
) {
493 salt
= data_blob_string_const(pkb3
->salt
.string
);
495 key
.salt
= calloc(1, sizeof(*key
.salt
));
496 if (key
.salt
== NULL
) {
501 key
.salt
->type
= KRB5_PW_SALT
;
503 ret
= krb5_copy_data_contents(&key
.salt
->salt
,
513 ret
= smb_krb5_keyblock_init_contents(context
,
514 pkb3
->keys
[i
].keytype
,
515 pkb3
->keys
[i
].value
->data
,
516 pkb3
->keys
[i
].value
->length
,
527 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
528 entry_ex
->entry
.keys
.len
++;
534 entry_ex
->entry
.keys
.len
= 0;
536 if (entry_ex
->entry
.keys
.len
== 0 && entry_ex
->entry
.keys
.val
) {
537 free(entry_ex
->entry
.keys
.val
);
538 entry_ex
->entry
.keys
.val
= NULL
;
543 static int principal_comp_strcmp_int(krb5_context context
,
544 krb5_const_principal principal
,
545 unsigned int component
,
552 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
553 p
= krb5_principal_get_comp_string(context
, principal
, component
);
560 if (component
>= krb5_princ_size(context
, principal
)) {
564 d
= krb5_princ_component(context
, principal
, component
);
573 return strncasecmp(p
, string
, len
);
575 return strncmp(p
, string
, len
);
579 static int principal_comp_strcasecmp(krb5_context context
,
580 krb5_const_principal principal
,
581 unsigned int component
,
584 return principal_comp_strcmp_int(context
, principal
,
585 component
, string
, true);
588 static int principal_comp_strcmp(krb5_context context
,
589 krb5_const_principal principal
,
590 unsigned int component
,
593 return principal_comp_strcmp_int(context
, principal
,
594 component
, string
, false);
598 * Construct an hdb_entry from a directory entry.
600 static krb5_error_code
samba_kdc_message2entry(krb5_context context
,
601 struct samba_kdc_db_context
*kdc_db_ctx
,
603 krb5_const_principal principal
,
604 enum samba_kdc_ent_type ent_type
,
606 struct ldb_dn
*realm_dn
,
607 struct ldb_message
*msg
,
608 hdb_entry_ex
*entry_ex
)
610 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
611 uint32_t userAccountControl
;
612 uint32_t msDS_User_Account_Control_Computed
;
614 krb5_error_code ret
= 0;
615 krb5_boolean is_computer
= FALSE
;
617 struct samba_kdc_entry
*p
;
622 bool is_rodc
= false;
623 struct ldb_message_element
*objectclasses
;
624 struct ldb_val computer_val
;
625 const char *samAccountName
= ldb_msg_find_attr_as_string(msg
, "samAccountName", NULL
);
626 computer_val
.data
= discard_const_p(uint8_t,"computer");
627 computer_val
.length
= strlen((const char *)computer_val
.data
);
629 if (ldb_msg_find_element(msg
, "msDS-SecondaryKrbTgtNumber")) {
633 if (!samAccountName
) {
635 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry: no samAccountName present");
639 objectclasses
= ldb_msg_find_element(msg
, "objectClass");
641 if (objectclasses
&& ldb_msg_find_val(objectclasses
, &computer_val
)) {
645 ZERO_STRUCTP(entry_ex
);
647 p
= talloc_zero(mem_ctx
, struct samba_kdc_entry
);
653 p
->kdc_db_ctx
= kdc_db_ctx
;
654 p
->entry_ex
= entry_ex
;
655 p
->realm_dn
= talloc_reference(p
, realm_dn
);
661 talloc_set_destructor(p
, samba_kdc_entry_destructor
);
663 /* make sure we do not have bogus data in there */
664 memset(&entry_ex
->entry
, 0, sizeof(hdb_entry
));
667 entry_ex
->free_entry
= samba_kdc_free_entry
;
669 userAccountControl
= ldb_msg_find_attr_as_uint(msg
, "userAccountControl", 0);
671 msDS_User_Account_Control_Computed
672 = ldb_msg_find_attr_as_uint(msg
,
673 "msDS-User-Account-Control-Computed",
677 * This brings in the lockout flag, block the account if not
678 * found. We need the weird UF_ACCOUNTDISABLE check because
679 * we do not want to fail open if the value is not returned,
680 * but 0 is a valid value (all OK)
682 if (msDS_User_Account_Control_Computed
== UF_ACCOUNTDISABLE
) {
684 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry: "
685 "no msDS-User-Account-Control-Computed present");
688 userAccountControl
|= msDS_User_Account_Control_Computed
;
692 * If we are set to canonicalize, we get back the fixed UPPER
693 * case realm, and the real username (ie matching LDAP
696 * Otherwise, if we are set to enterprise, we
697 * get back the whole principal as-sent
699 * Finally, if we are not set to canonicalize, we get back the
700 * fixed UPPER case realm, but the as-sent username
703 if (ent_type
== SAMBA_KDC_ENT_TYPE_KRBTGT
) {
704 if (flags
& (HDB_F_CANON
)) {
706 * When requested to do so, ensure that the
707 * both realm values in the principal are set
708 * to the upper case, canonical realm
710 ret
= smb_krb5_make_principal(context
, &entry_ex
->entry
.principal
,
711 lpcfg_realm(lp_ctx
), "krbtgt",
712 lpcfg_realm(lp_ctx
), NULL
);
714 krb5_clear_error_message(context
);
717 smb_krb5_principal_set_type(context
, entry_ex
->entry
.principal
, KRB5_NT_SRV_INST
);
719 ret
= krb5_copy_principal(context
, principal
, &entry_ex
->entry
.principal
);
721 krb5_clear_error_message(context
);
725 * this appears to be required regardless of
726 * the canonicalize flag from the client
728 ret
= smb_krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
));
730 krb5_clear_error_message(context
);
735 } else if (ent_type
== SAMBA_KDC_ENT_TYPE_ANY
&& principal
== NULL
) {
736 ret
= smb_krb5_make_principal(context
, &entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
), samAccountName
, NULL
);
738 krb5_clear_error_message(context
);
741 } else if (flags
& HDB_F_CANON
&& flags
& HDB_F_FOR_AS_REQ
) {
743 * HDB_F_CANON maps from the canonicalize flag in the
744 * packet, and has a different meaning between AS-REQ
745 * and TGS-REQ. We only change the principal in the AS-REQ case
747 ret
= smb_krb5_make_principal(context
, &entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
), samAccountName
, NULL
);
749 krb5_clear_error_message(context
);
753 ret
= krb5_copy_principal(context
, principal
, &entry_ex
->entry
.principal
);
755 krb5_clear_error_message(context
);
759 if (smb_krb5_principal_get_type(context
, principal
) != KRB5_NT_ENTERPRISE_PRINCIPAL
) {
760 /* While we have copied the client principal, tests
761 * show that Win2k3 returns the 'corrected' realm, not
762 * the client-specified realm. This code attempts to
763 * replace the client principal's realm with the one
764 * we determine from our records */
766 /* this has to be with malloc() */
767 ret
= smb_krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, lpcfg_realm(lp_ctx
));
769 krb5_clear_error_message(context
);
775 /* First try and figure out the flags based on the userAccountControl */
776 entry_ex
->entry
.flags
= uf2HDBFlags(context
, userAccountControl
, ent_type
);
778 /* Windows 2008 seems to enforce this (very sensible) rule by
779 * default - don't allow offline attacks on a user's password
780 * by asking for a ticket to them as a service (encrypted with
781 * their probably patheticly insecure password) */
783 if (entry_ex
->entry
.flags
.server
784 && lpcfg_parm_bool(lp_ctx
, NULL
, "kdc", "require spn for service", true)) {
785 if (!is_computer
&& !ldb_msg_find_attr_as_string(msg
, "servicePrincipalName", NULL
)) {
786 entry_ex
->entry
.flags
.server
= 0;
790 * To give the correct type of error to the client, we must
791 * not just return the entry without .server set, we must
792 * pretend the principal does not exist. Otherwise we may
793 * return ERR_POLICY instead of
794 * KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN
796 if (ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
&& entry_ex
->entry
.flags
.server
== 0) {
797 ret
= HDB_ERR_NOENTRY
;
798 krb5_set_error_message(context
, ret
, "samba_kdc_message2entry: no servicePrincipalName present for this server, refusing with no-such-entry");
801 if (flags
& HDB_F_ADMIN_DATA
) {
802 /* These (created_by, modified_by) parts of the entry are not relevant for Samba4's use
803 * of the Heimdal KDC. They are stored in a the traditional
804 * DB for audit purposes, and still form part of the structure
807 /* use 'whenCreated' */
808 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
809 /* use 'kadmin' for now (needed by mit_samba) */
811 ret
= smb_krb5_make_principal(context
,
812 &entry_ex
->entry
.created_by
.principal
,
813 lpcfg_realm(lp_ctx
), "kadmin", NULL
);
815 krb5_clear_error_message(context
);
819 entry_ex
->entry
.modified_by
= (Event
*) malloc(sizeof(Event
));
820 if (entry_ex
->entry
.modified_by
== NULL
) {
822 krb5_set_error_message(context
, ret
, "malloc: out of memory");
826 /* use 'whenChanged' */
827 entry_ex
->entry
.modified_by
->time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenChanged", 0);
828 /* use 'kadmin' for now (needed by mit_samba) */
829 ret
= smb_krb5_make_principal(context
,
830 &entry_ex
->entry
.modified_by
->principal
,
831 lpcfg_realm(lp_ctx
), "kadmin", NULL
);
833 krb5_clear_error_message(context
);
839 /* The lack of password controls etc applies to krbtgt by
840 * virtue of being that particular RID */
841 status
= dom_sid_split_rid(NULL
, samdb_result_dom_sid(mem_ctx
, msg
, "objectSid"), NULL
, &rid
);
843 if (!NT_STATUS_IS_OK(status
)) {
848 if (rid
== DOMAIN_RID_KRBTGT
) {
851 entry_ex
->entry
.valid_end
= NULL
;
852 entry_ex
->entry
.pw_end
= NULL
;
854 entry_ex
->entry
.flags
.invalid
= 0;
855 entry_ex
->entry
.flags
.server
= 1;
857 realm
= smb_krb5_principal_get_realm(context
, principal
);
863 /* Don't mark all requests for the krbtgt/realm as
864 * 'change password', as otherwise we could get into
865 * trouble, and not enforce the password expirty.
866 * Instead, only do it when request is for the kpasswd service */
867 if (ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
868 && krb5_princ_size(context
, principal
) == 2
869 && (principal_comp_strcmp(context
, principal
, 0, "kadmin") == 0)
870 && (principal_comp_strcmp(context
, principal
, 1, "changepw") == 0)
871 && lpcfg_is_my_domain_or_realm(lp_ctx
, realm
)) {
872 entry_ex
->entry
.flags
.change_pw
= 1;
877 entry_ex
->entry
.flags
.client
= 0;
878 entry_ex
->entry
.flags
.forwardable
= 1;
879 entry_ex
->entry
.flags
.ok_as_delegate
= 1;
880 } else if (is_rodc
) {
881 /* The RODC krbtgt account is like the main krbtgt,
882 * but it does not have a changepw or kadmin
885 entry_ex
->entry
.valid_end
= NULL
;
886 entry_ex
->entry
.pw_end
= NULL
;
888 /* Also don't allow the RODC krbtgt to be a client (it should not be needed) */
889 entry_ex
->entry
.flags
.client
= 0;
890 entry_ex
->entry
.flags
.invalid
= 0;
891 entry_ex
->entry
.flags
.server
= 1;
893 entry_ex
->entry
.flags
.client
= 0;
894 entry_ex
->entry
.flags
.forwardable
= 1;
895 entry_ex
->entry
.flags
.ok_as_delegate
= 0;
896 } else if (entry_ex
->entry
.flags
.server
&& ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
) {
897 /* The account/password expiry only applies when the account is used as a
898 * client (ie password login), not when used as a server */
900 /* Make very well sure we don't use this for a client,
901 * it could bypass the password restrictions */
902 entry_ex
->entry
.flags
.client
= 0;
904 entry_ex
->entry
.valid_end
= NULL
;
905 entry_ex
->entry
.pw_end
= NULL
;
908 NTTIME must_change_time
909 = samdb_result_force_password_change(kdc_db_ctx
->samdb
, mem_ctx
,
911 if (must_change_time
== 0x7FFFFFFFFFFFFFFFULL
) {
912 entry_ex
->entry
.pw_end
= NULL
;
914 entry_ex
->entry
.pw_end
= malloc(sizeof(*entry_ex
->entry
.pw_end
));
915 if (entry_ex
->entry
.pw_end
== NULL
) {
919 *entry_ex
->entry
.pw_end
= nt_time_to_unix(must_change_time
);
922 acct_expiry
= samdb_result_account_expires(msg
);
923 if (acct_expiry
== 0x7FFFFFFFFFFFFFFFULL
) {
924 entry_ex
->entry
.valid_end
= NULL
;
926 entry_ex
->entry
.valid_end
= malloc(sizeof(*entry_ex
->entry
.valid_end
));
927 if (entry_ex
->entry
.valid_end
== NULL
) {
931 *entry_ex
->entry
.valid_end
= nt_time_to_unix(acct_expiry
);
935 entry_ex
->entry
.valid_start
= NULL
;
937 entry_ex
->entry
.max_life
= malloc(sizeof(*entry_ex
->entry
.max_life
));
938 if (entry_ex
->entry
.max_life
== NULL
) {
943 if (ent_type
== SAMBA_KDC_ENT_TYPE_SERVER
) {
944 *entry_ex
->entry
.max_life
= kdc_db_ctx
->policy
.svc_tkt_lifetime
;
945 } else if (ent_type
== SAMBA_KDC_ENT_TYPE_KRBTGT
|| ent_type
== SAMBA_KDC_ENT_TYPE_CLIENT
) {
946 *entry_ex
->entry
.max_life
= kdc_db_ctx
->policy
.usr_tkt_lifetime
;
948 *entry_ex
->entry
.max_life
= MIN(kdc_db_ctx
->policy
.svc_tkt_lifetime
,
949 kdc_db_ctx
->policy
.usr_tkt_lifetime
);
952 entry_ex
->entry
.max_renew
= malloc(sizeof(*entry_ex
->entry
.max_life
));
953 if (entry_ex
->entry
.max_renew
== NULL
) {
958 *entry_ex
->entry
.max_renew
= kdc_db_ctx
->policy
.renewal_lifetime
;
960 /* Get keys from the db */
961 ret
= samba_kdc_message2entry_keys(context
, kdc_db_ctx
, p
, msg
,
962 rid
, is_rodc
, userAccountControl
,
965 /* Could be bougus data in the entry, or out of memory */
969 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
970 if (entry_ex
->entry
.etypes
== NULL
) {
971 krb5_clear_error_message(context
);
975 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
976 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
977 if (entry_ex
->entry
.etypes
->val
== NULL
) {
978 krb5_clear_error_message(context
);
982 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
983 entry_ex
->entry
.etypes
->val
[i
] = KRB5_KEY_TYPE(&entry_ex
->entry
.keys
.val
[i
].key
);
987 p
->msg
= talloc_steal(p
, msg
);
991 /* This doesn't free ent itself, that is for the eventual caller to do */
992 hdb_free_entry(context
, entry_ex
);
993 ZERO_STRUCTP(entry_ex
);
995 talloc_steal(kdc_db_ctx
, entry_ex
->ctx
);
1002 * Construct an hdb_entry from a directory entry.
1003 * The kvno is what the remote client asked for
1005 static krb5_error_code
samba_kdc_trust_message2entry(krb5_context context
,
1006 struct samba_kdc_db_context
*kdc_db_ctx
,
1007 TALLOC_CTX
*mem_ctx
, krb5_const_principal principal
,
1008 enum trust_direction direction
,
1009 struct ldb_dn
*realm_dn
,
1012 struct ldb_message
*msg
,
1013 hdb_entry_ex
*entry_ex
)
1015 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
1016 const char *dnsdomain
;
1017 const char *realm
= lpcfg_realm(lp_ctx
);
1018 DATA_BLOB password_utf16
= data_blob_null
;
1019 DATA_BLOB password_utf8
= data_blob_null
;
1020 struct samr_Password _password_hash
;
1021 const struct samr_Password
*password_hash
= NULL
;
1022 const struct ldb_val
*password_val
;
1023 struct trustAuthInOutBlob password_blob
;
1024 struct samba_kdc_entry
*p
;
1026 uint32_t current_kvno
;
1027 uint32_t num_keys
= 0;
1028 enum ndr_err_code ndr_err
;
1029 int ret
, trust_direction_flags
;
1031 struct AuthenticationInformationArray
*auth_array
;
1032 uint32_t supported_enctypes
= ENC_RC4_HMAC_MD5
;
1034 if (dsdb_functional_level(kdc_db_ctx
->samdb
) >= DS_DOMAIN_FUNCTION_2008
) {
1035 supported_enctypes
= ldb_msg_find_attr_as_uint(msg
,
1036 "msDS-SupportedEncryptionTypes",
1037 supported_enctypes
);
1040 trust_direction_flags
= ldb_msg_find_attr_as_int(msg
, "trustDirection", 0);
1042 if (direction
== INBOUND
) {
1043 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthIncoming");
1045 } else { /* OUTBOUND */
1046 dnsdomain
= ldb_msg_find_attr_as_string(msg
, "trustPartner", NULL
);
1048 realm
= strupper_talloc(mem_ctx
, dnsdomain
);
1049 password_val
= ldb_msg_find_ldb_val(msg
, "trustAuthOutgoing");
1052 if (!password_val
|| !(trust_direction_flags
& direction
)) {
1053 krb5_clear_error_message(context
);
1054 ret
= HDB_ERR_NOENTRY
;
1058 ndr_err
= ndr_pull_struct_blob(password_val
, mem_ctx
, &password_blob
,
1059 (ndr_pull_flags_fn_t
)ndr_pull_trustAuthInOutBlob
);
1060 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
1061 krb5_clear_error_message(context
);
1066 p
= talloc(mem_ctx
, struct samba_kdc_entry
);
1072 p
->kdc_db_ctx
= kdc_db_ctx
;
1073 p
->entry_ex
= entry_ex
;
1074 p
->realm_dn
= realm_dn
;
1076 talloc_set_destructor(p
, samba_kdc_entry_destructor
);
1078 /* make sure we do not have bogus data in there */
1079 memset(&entry_ex
->entry
, 0, sizeof(hdb_entry
));
1082 entry_ex
->free_entry
= samba_kdc_free_entry
;
1084 /* use 'whenCreated' */
1085 entry_ex
->entry
.created_by
.time
= ldb_msg_find_krb5time_ldap_time(msg
, "whenCreated", 0);
1086 /* use 'kadmin' for now (needed by mit_samba) */
1087 ret
= smb_krb5_make_principal(context
,
1088 &entry_ex
->entry
.created_by
.principal
,
1089 realm
, "kadmin", NULL
);
1091 krb5_clear_error_message(context
);
1095 ret
= krb5_copy_principal(context
, principal
, &entry_ex
->entry
.principal
);
1097 krb5_clear_error_message(context
);
1102 * While we have copied the client principal, tests
1103 * show that Win2k3 returns the 'corrected' realm, not
1104 * the client-specified realm. This code attempts to
1105 * replace the client principal's realm with the one
1106 * we determine from our records
1109 ret
= smb_krb5_principal_set_realm(context
, entry_ex
->entry
.principal
, realm
);
1111 krb5_clear_error_message(context
);
1115 entry_ex
->entry
.valid_start
= NULL
;
1117 /* we need to work out if we are going to use the current or
1118 * the previous password hash.
1119 * We base this on the kvno the client passes in. If the kvno
1120 * passed in is equal to the current kvno in our database then
1121 * we use the current structure. If it is the current kvno-1,
1122 * then we use the previous substrucure.
1125 /* first work out the current kvno */
1127 for (i
=0; i
< password_blob
.count
; i
++) {
1128 if (password_blob
.current
.array
[i
].AuthType
== TRUST_AUTH_TYPE_VERSION
) {
1129 current_kvno
= password_blob
.current
.array
[i
].AuthInfo
.version
.version
;
1133 /* work out whether we will use the previous or current
1135 if (password_blob
.previous
.count
== 0) {
1136 /* there is no previous password */
1137 use_previous
= false;
1138 } else if (!(flags
& HDB_F_KVNO_SPECIFIED
) ||
1139 kvno
== current_kvno
) {
1140 use_previous
= false;
1141 } else if ((kvno
+1 == current_kvno
) ||
1142 (kvno
== 255 && current_kvno
== 0)) {
1143 use_previous
= true;
1145 DEBUG(1,(__location__
": Request for unknown kvno %u - current kvno is %u\n",
1146 kvno
, current_kvno
));
1147 krb5_clear_error_message(context
);
1148 ret
= HDB_ERR_NOENTRY
;
1153 auth_array
= &password_blob
.previous
;
1155 auth_array
= &password_blob
.current
;
1158 /* use the kvno the client specified, if available */
1159 if (flags
& HDB_F_KVNO_SPECIFIED
) {
1160 entry_ex
->entry
.kvno
= kvno
;
1162 entry_ex
->entry
.kvno
= current_kvno
;
1165 for (i
=0; i
< auth_array
->count
; i
++) {
1166 if (auth_array
->array
[i
].AuthType
== TRUST_AUTH_TYPE_CLEAR
) {
1169 password_utf16
= data_blob_const(auth_array
->array
[i
].AuthInfo
.clear
.password
,
1170 auth_array
->array
[i
].AuthInfo
.clear
.size
);
1171 if (password_utf16
.length
== 0) {
1175 if (supported_enctypes
& ENC_RC4_HMAC_MD5
) {
1176 mdfour(_password_hash
.hash
, password_utf16
.data
, password_utf16
.length
);
1177 if (password_hash
== NULL
) {
1180 password_hash
= &_password_hash
;
1183 if (!(supported_enctypes
& (ENC_HMAC_SHA1_96_AES128
|ENC_HMAC_SHA1_96_AES256
))) {
1187 ok
= convert_string_talloc(mem_ctx
,
1188 CH_UTF16MUNGED
, CH_UTF8
,
1189 password_utf16
.data
,
1190 password_utf16
.length
,
1191 (void *)&password_utf8
.data
,
1192 &password_utf8
.length
);
1194 krb5_clear_error_message(context
);
1199 if (supported_enctypes
& ENC_HMAC_SHA1_96_AES128
) {
1202 if (supported_enctypes
& ENC_HMAC_SHA1_96_AES256
) {
1206 } else if (auth_array
->array
[i
].AuthType
== TRUST_AUTH_TYPE_NT4OWF
) {
1207 if (supported_enctypes
& ENC_RC4_HMAC_MD5
) {
1208 password_hash
= &auth_array
->array
[i
].AuthInfo
.nt4owf
.password
;
1214 /* Must have found a cleartext or MD4 password */
1215 if (num_keys
== 0) {
1216 DEBUG(1,(__location__
": no usable key found\n"));
1217 krb5_clear_error_message(context
);
1218 ret
= HDB_ERR_NOENTRY
;
1222 entry_ex
->entry
.keys
.val
= calloc(num_keys
, sizeof(Key
));
1223 if (entry_ex
->entry
.keys
.val
== NULL
) {
1224 krb5_clear_error_message(context
);
1229 if (password_utf8
.length
!= 0) {
1231 krb5_const_principal salt_principal
= entry_ex
->entry
.principal
;
1233 krb5_data cleartext_data
;
1235 cleartext_data
.data
= password_utf8
.data
;
1236 cleartext_data
.length
= password_utf8
.length
;
1238 ret
= smb_krb5_get_pw_salt(context
,
1245 if (supported_enctypes
& ENC_HMAC_SHA1_96_AES256
) {
1246 ret
= smb_krb5_create_key_from_string(context
,
1250 ENCTYPE_AES256_CTS_HMAC_SHA1_96
,
1253 kerberos_free_data_contents(context
, &salt
);
1257 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
1258 entry_ex
->entry
.keys
.len
++;
1261 if (supported_enctypes
& ENC_HMAC_SHA1_96_AES128
) {
1262 ret
= smb_krb5_create_key_from_string(context
,
1266 ENCTYPE_AES128_CTS_HMAC_SHA1_96
,
1269 kerberos_free_data_contents(context
, &salt
);
1273 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
1274 entry_ex
->entry
.keys
.len
++;
1277 kerberos_free_data_contents(context
, &salt
);
1280 if (password_hash
!= NULL
) {
1283 ret
= smb_krb5_keyblock_init_contents(context
,
1284 ENCTYPE_ARCFOUR_HMAC
,
1285 password_hash
->hash
,
1286 sizeof(password_hash
->hash
),
1292 entry_ex
->entry
.keys
.val
[entry_ex
->entry
.keys
.len
] = key
;
1293 entry_ex
->entry
.keys
.len
++;
1296 entry_ex
->entry
.flags
= int2HDBFlags(0);
1297 entry_ex
->entry
.flags
.immutable
= 1;
1298 entry_ex
->entry
.flags
.invalid
= 0;
1299 entry_ex
->entry
.flags
.server
= 1;
1300 entry_ex
->entry
.flags
.require_preauth
= 1;
1302 entry_ex
->entry
.pw_end
= NULL
;
1304 entry_ex
->entry
.max_life
= NULL
;
1306 entry_ex
->entry
.max_renew
= NULL
;
1308 entry_ex
->entry
.etypes
= malloc(sizeof(*(entry_ex
->entry
.etypes
)));
1309 if (entry_ex
->entry
.etypes
== NULL
) {
1310 krb5_clear_error_message(context
);
1314 entry_ex
->entry
.etypes
->len
= entry_ex
->entry
.keys
.len
;
1315 entry_ex
->entry
.etypes
->val
= calloc(entry_ex
->entry
.etypes
->len
, sizeof(int));
1316 if (entry_ex
->entry
.etypes
->val
== NULL
) {
1317 krb5_clear_error_message(context
);
1321 for (i
=0; i
< entry_ex
->entry
.etypes
->len
; i
++) {
1322 entry_ex
->entry
.etypes
->val
[i
] = KRB5_KEY_TYPE(&entry_ex
->entry
.keys
.val
[i
].key
);
1326 p
->msg
= talloc_steal(p
, msg
);
1330 /* This doesn't free ent itself, that is for the eventual caller to do */
1331 hdb_free_entry(context
, entry_ex
);
1333 talloc_steal(kdc_db_ctx
, entry_ex
->ctx
);
1340 static krb5_error_code
samba_kdc_lookup_trust(krb5_context context
, struct ldb_context
*ldb_ctx
,
1341 TALLOC_CTX
*mem_ctx
,
1343 struct ldb_dn
*realm_dn
,
1344 struct ldb_message
**pmsg
)
1347 const char * const *attrs
= trust_attrs
;
1349 status
= sam_get_results_trust(ldb_ctx
,
1350 mem_ctx
, realm
, realm
, attrs
,
1352 if (NT_STATUS_IS_OK(status
)) {
1354 } else if (NT_STATUS_EQUAL(status
, NT_STATUS_NOT_FOUND
)) {
1355 return HDB_ERR_NOENTRY
;
1356 } else if (NT_STATUS_EQUAL(status
, NT_STATUS_NO_MEMORY
)) {
1358 krb5_set_error_message(context
, ret
, "get_sam_result_trust: out of memory");
1362 krb5_set_error_message(context
, ret
, "get_sam_result_trust: %s", nt_errstr(status
));
1367 static krb5_error_code
samba_kdc_lookup_client(krb5_context context
,
1368 struct samba_kdc_db_context
*kdc_db_ctx
,
1369 TALLOC_CTX
*mem_ctx
,
1370 krb5_const_principal principal
,
1372 struct ldb_dn
**realm_dn
,
1373 struct ldb_message
**msg
) {
1375 char *principal_string
;
1377 if (smb_krb5_principal_get_type(context
, principal
) == KRB5_NT_ENTERPRISE_PRINCIPAL
) {
1378 principal_string
= smb_krb5_principal_get_comp_string(mem_ctx
, context
,
1380 if (principal_string
== NULL
) {
1383 nt_status
= sam_get_results_principal(kdc_db_ctx
->samdb
,
1384 mem_ctx
, principal_string
, attrs
,
1386 TALLOC_FREE(principal_string
);
1388 krb5_error_code ret
;
1389 ret
= krb5_unparse_name(context
, principal
, &principal_string
);
1393 nt_status
= sam_get_results_principal(kdc_db_ctx
->samdb
,
1394 mem_ctx
, principal_string
, attrs
,
1396 free(principal_string
);
1399 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_SUCH_USER
)) {
1400 return HDB_ERR_NOENTRY
;
1401 } else if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_NO_MEMORY
)) {
1403 } else if (!NT_STATUS_IS_OK(nt_status
)) {
1410 static krb5_error_code
samba_kdc_fetch_client(krb5_context context
,
1411 struct samba_kdc_db_context
*kdc_db_ctx
,
1412 TALLOC_CTX
*mem_ctx
,
1413 krb5_const_principal principal
,
1415 hdb_entry_ex
*entry_ex
) {
1416 struct ldb_dn
*realm_dn
;
1417 krb5_error_code ret
;
1418 struct ldb_message
*msg
= NULL
;
1420 ret
= samba_kdc_lookup_client(context
, kdc_db_ctx
,
1421 mem_ctx
, principal
, user_attrs
,
1427 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1428 principal
, SAMBA_KDC_ENT_TYPE_CLIENT
,
1430 realm_dn
, msg
, entry_ex
);
1434 static krb5_error_code
samba_kdc_fetch_krbtgt(krb5_context context
,
1435 struct samba_kdc_db_context
*kdc_db_ctx
,
1436 TALLOC_CTX
*mem_ctx
,
1437 krb5_const_principal principal
,
1440 hdb_entry_ex
*entry_ex
)
1442 struct loadparm_context
*lp_ctx
= kdc_db_ctx
->lp_ctx
;
1443 krb5_error_code ret
;
1444 struct ldb_message
*msg
= NULL
;
1445 struct ldb_dn
*realm_dn
= ldb_get_default_basedn(kdc_db_ctx
->samdb
);
1446 char *realm_from_princ
, *realm_from_princ_malloc
;
1447 char *realm_princ_comp
= smb_krb5_principal_get_comp_string(mem_ctx
, context
, principal
, 1);
1449 realm_from_princ_malloc
= smb_krb5_principal_get_realm(context
, principal
);
1450 if (realm_from_princ_malloc
== NULL
) {
1452 return HDB_ERR_NOENTRY
;
1454 realm_from_princ
= talloc_strdup(mem_ctx
, realm_from_princ_malloc
);
1455 free(realm_from_princ_malloc
);
1456 if (realm_from_princ
== NULL
) {
1457 return HDB_ERR_NOENTRY
;
1460 if (krb5_princ_size(context
, principal
) != 2
1461 || (principal_comp_strcmp(context
, principal
, 0, KRB5_TGS_NAME
) != 0)) {
1463 return HDB_ERR_NOENTRY
;
1466 /* krbtgt case. Either us or a trusted realm */
1468 if (lpcfg_is_my_domain_or_realm(lp_ctx
, realm_from_princ
)
1469 && lpcfg_is_my_domain_or_realm(lp_ctx
, realm_princ_comp
)) {
1470 /* us, or someone quite like us */
1471 /* Cludge, cludge cludge. If the realm part of krbtgt/realm,
1472 * is in our db, then direct the caller at our primary
1476 unsigned int krbtgt_number
;
1477 /* w2k8r2 sometimes gives us a kvno of 255 for inter-domain
1478 trust tickets. We don't yet know what this means, but we do
1479 seem to need to treat it as unspecified */
1480 if (flags
& HDB_F_KVNO_SPECIFIED
) {
1481 krbtgt_number
= SAMBA_KVNO_GET_KRBTGT(kvno
);
1482 if (kdc_db_ctx
->rodc
) {
1483 if (krbtgt_number
!= kdc_db_ctx
->my_krbtgt_number
) {
1484 return HDB_ERR_NOT_FOUND_HERE
;
1488 krbtgt_number
= kdc_db_ctx
->my_krbtgt_number
;
1491 if (krbtgt_number
== kdc_db_ctx
->my_krbtgt_number
) {
1492 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
,
1493 &msg
, kdc_db_ctx
->krbtgt_dn
, LDB_SCOPE_BASE
,
1494 krbtgt_attrs
, DSDB_SEARCH_NO_GLOBAL_CATALOG
,
1495 "(objectClass=user)");
1497 /* We need to look up an RODC krbtgt (perhaps
1498 * ours, if we are an RODC, perhaps another
1499 * RODC if we are a read-write DC */
1500 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
,
1501 &msg
, realm_dn
, LDB_SCOPE_SUBTREE
,
1503 DSDB_SEARCH_SHOW_EXTENDED_DN
| DSDB_SEARCH_NO_GLOBAL_CATALOG
,
1504 "(&(objectClass=user)(msDS-SecondaryKrbTgtNumber=%u))", (unsigned)(krbtgt_number
));
1507 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1508 krb5_warnx(context
, "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1509 (unsigned)(krbtgt_number
));
1510 krb5_set_error_message(context
, HDB_ERR_NOENTRY
,
1511 "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1512 (unsigned)(krbtgt_number
));
1513 return HDB_ERR_NOENTRY
;
1514 } else if (lret
!= LDB_SUCCESS
) {
1515 krb5_warnx(context
, "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1516 (unsigned)(krbtgt_number
));
1517 krb5_set_error_message(context
, HDB_ERR_NOENTRY
,
1518 "samba_kdc_fetch: could not find KRBTGT number %u in DB!",
1519 (unsigned)(krbtgt_number
));
1520 return HDB_ERR_NOENTRY
;
1523 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1524 principal
, SAMBA_KDC_ENT_TYPE_KRBTGT
,
1525 flags
, realm_dn
, msg
, entry_ex
);
1527 krb5_warnx(context
, "samba_kdc_fetch: self krbtgt message2entry failed");
1532 enum trust_direction direction
= UNKNOWN
;
1533 const char *realm
= NULL
;
1535 /* Either an inbound or outbound trust */
1537 if (strcasecmp(lpcfg_realm(lp_ctx
), realm_from_princ
) == 0) {
1538 /* look for inbound trust */
1539 direction
= INBOUND
;
1540 realm
= realm_princ_comp
;
1541 } else if (principal_comp_strcasecmp(context
, principal
, 1, lpcfg_realm(lp_ctx
)) == 0) {
1542 /* look for outbound trust */
1543 direction
= OUTBOUND
;
1544 realm
= realm_from_princ
;
1546 krb5_warnx(context
, "samba_kdc_fetch: not our realm for trusts ('%s', '%s')",
1549 krb5_set_error_message(context
, HDB_ERR_NOENTRY
, "samba_kdc_fetch: not our realm for trusts ('%s', '%s')",
1552 return HDB_ERR_NOENTRY
;
1555 /* Trusted domains are under CN=system */
1557 ret
= samba_kdc_lookup_trust(context
, kdc_db_ctx
->samdb
,
1559 realm
, realm_dn
, &msg
);
1562 krb5_warnx(context
, "samba_kdc_fetch: could not find principal in DB");
1563 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: could not find principal in DB");
1567 ret
= samba_kdc_trust_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1568 principal
, direction
,
1569 realm_dn
, flags
, kvno
, msg
, entry_ex
);
1571 krb5_warnx(context
, "samba_kdc_fetch: trust_message2entry failed for %s",
1572 ldb_dn_get_linearized(msg
->dn
));
1573 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: "
1574 "trust_message2entry failed for %s",
1575 ldb_dn_get_linearized(msg
->dn
));
1582 static krb5_error_code
samba_kdc_lookup_server(krb5_context context
,
1583 struct samba_kdc_db_context
*kdc_db_ctx
,
1584 TALLOC_CTX
*mem_ctx
,
1585 krb5_const_principal principal
,
1588 struct ldb_dn
**realm_dn
,
1589 struct ldb_message
**msg
)
1591 krb5_error_code ret
;
1592 if ((smb_krb5_principal_get_type(context
, principal
) != KRB5_NT_ENTERPRISE_PRINCIPAL
)
1593 && krb5_princ_size(context
, principal
) >= 2) {
1594 /* 'normal server' case */
1597 struct ldb_dn
*user_dn
;
1598 char *principal_string
;
1600 ret
= krb5_unparse_name_flags(context
, principal
,
1601 KRB5_PRINCIPAL_UNPARSE_NO_REALM
,
1607 /* At this point we may find the host is known to be
1608 * in a different realm, so we should generate a
1609 * referral instead */
1610 nt_status
= crack_service_principal_name(kdc_db_ctx
->samdb
,
1611 mem_ctx
, principal_string
,
1612 &user_dn
, realm_dn
);
1613 free(principal_string
);
1615 if (!NT_STATUS_IS_OK(nt_status
)) {
1616 return HDB_ERR_NOENTRY
;
1619 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
,
1621 msg
, user_dn
, LDB_SCOPE_BASE
,
1623 DSDB_SEARCH_SHOW_EXTENDED_DN
| DSDB_SEARCH_NO_GLOBAL_CATALOG
,
1625 if (ldb_ret
!= LDB_SUCCESS
) {
1626 return HDB_ERR_NOENTRY
;
1629 } else if (!(flags
& HDB_F_FOR_AS_REQ
)
1630 && smb_krb5_principal_get_type(context
, principal
) == KRB5_NT_ENTERPRISE_PRINCIPAL
) {
1632 * The behaviour of accepting an
1633 * KRB5_NT_ENTERPRISE_PRINCIPAL server principal
1634 * containing a UPN only applies to TGS-REQ packets,
1635 * not AS-REQ packets.
1637 return samba_kdc_lookup_client(context
, kdc_db_ctx
,
1638 mem_ctx
, principal
, attrs
,
1643 * - the AS-REQ, where we only accept
1644 * samAccountName based lookups for the server, no
1645 * matter if the name is an
1646 * KRB5_NT_ENTERPRISE_PRINCIPAL or not
1647 * - for the TGS-REQ when we are not given an
1648 * KRB5_NT_ENTERPRISE_PRINCIPAL, which also must
1649 * only lookup samAccountName based names.
1653 krb5_principal enterprise_prinicpal
= NULL
;
1655 if (smb_krb5_principal_get_type(context
, principal
) == KRB5_NT_ENTERPRISE_PRINCIPAL
) {
1657 /* Need to reparse the enterprise principal to find the real target */
1658 if (krb5_princ_size(context
, principal
) != 1) {
1659 ret
= KRB5_PARSE_MALFORMED
;
1660 krb5_set_error_message(context
, ret
, "samba_kdc_lookup_server: request for an "
1661 "enterprise principal with wrong (%d) number of components",
1662 krb5_princ_size(context
, principal
));
1665 str
= smb_krb5_principal_get_comp_string(mem_ctx
, context
, principal
, 0);
1667 return KRB5_PARSE_MALFORMED
;
1669 ret
= krb5_parse_name(context
, str
,
1670 &enterprise_prinicpal
);
1675 principal
= enterprise_prinicpal
;
1678 /* server as client principal case, but we must not lookup userPrincipalNames */
1679 *realm_dn
= ldb_get_default_basedn(kdc_db_ctx
->samdb
);
1681 /* TODO: Check if it is our realm, otherwise give referral */
1683 ret
= krb5_unparse_name_flags(context
, principal
,
1684 KRB5_PRINCIPAL_UNPARSE_NO_REALM
|
1685 KRB5_PRINCIPAL_UNPARSE_DISPLAY
,
1689 krb5_set_error_message(context
, ret
, "samba_kdc_lookup_principal: could not parse principal");
1690 krb5_warnx(context
, "samba_kdc_lookup_principal: could not parse principal");
1694 lret
= dsdb_search_one(kdc_db_ctx
->samdb
, mem_ctx
, msg
,
1695 *realm_dn
, LDB_SCOPE_SUBTREE
,
1697 DSDB_SEARCH_SHOW_EXTENDED_DN
| DSDB_SEARCH_NO_GLOBAL_CATALOG
,
1698 "(&(objectClass=user)(samAccountName=%s))",
1699 ldb_binary_encode_string(mem_ctx
, short_princ
));
1700 if (lret
== LDB_ERR_NO_SUCH_OBJECT
) {
1701 DEBUG(3, ("Failed to find an entry for %s\n", short_princ
));
1703 return HDB_ERR_NOENTRY
;
1705 if (lret
!= LDB_SUCCESS
) {
1706 DEBUG(3, ("Failed single search for %s - %s\n",
1707 short_princ
, ldb_errstring(kdc_db_ctx
->samdb
)));
1709 return HDB_ERR_NOENTRY
;
1714 return HDB_ERR_NOENTRY
;
1719 static krb5_error_code
samba_kdc_fetch_server(krb5_context context
,
1720 struct samba_kdc_db_context
*kdc_db_ctx
,
1721 TALLOC_CTX
*mem_ctx
,
1722 krb5_const_principal principal
,
1724 hdb_entry_ex
*entry_ex
)
1726 krb5_error_code ret
;
1727 struct ldb_dn
*realm_dn
;
1728 struct ldb_message
*msg
;
1730 ret
= samba_kdc_lookup_server(context
, kdc_db_ctx
, mem_ctx
, principal
,
1731 flags
, server_attrs
, &realm_dn
, &msg
);
1736 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1737 principal
, SAMBA_KDC_ENT_TYPE_SERVER
,
1739 realm_dn
, msg
, entry_ex
);
1741 krb5_warnx(context
, "samba_kdc_fetch: message2entry failed");
1747 krb5_error_code
samba_kdc_fetch(krb5_context context
,
1748 struct samba_kdc_db_context
*kdc_db_ctx
,
1749 krb5_const_principal principal
,
1752 hdb_entry_ex
*entry_ex
)
1754 krb5_error_code ret
= HDB_ERR_NOENTRY
;
1755 TALLOC_CTX
*mem_ctx
;
1757 mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_fetch context");
1760 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: talloc_named() failed!");
1764 if (flags
& HDB_F_GET_CLIENT
) {
1765 ret
= samba_kdc_fetch_client(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1766 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1768 if (flags
& HDB_F_GET_SERVER
) {
1769 /* krbtgt fits into this situation for trusted realms, and for resolving different versions of our own realm name */
1770 ret
= samba_kdc_fetch_krbtgt(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, kvno
, entry_ex
);
1771 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1773 /* We return 'no entry' if it does not start with krbtgt/, so move to the common case quickly */
1774 ret
= samba_kdc_fetch_server(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, entry_ex
);
1775 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1777 if (flags
& HDB_F_GET_KRBTGT
) {
1778 ret
= samba_kdc_fetch_krbtgt(context
, kdc_db_ctx
, mem_ctx
, principal
, flags
, kvno
, entry_ex
);
1779 if (ret
!= HDB_ERR_NOENTRY
) goto done
;
1783 talloc_free(mem_ctx
);
1787 struct samba_kdc_seq
{
1790 struct ldb_message
**msgs
;
1791 struct ldb_dn
*realm_dn
;
1794 static krb5_error_code
samba_kdc_seq(krb5_context context
,
1795 struct samba_kdc_db_context
*kdc_db_ctx
,
1796 hdb_entry_ex
*entry
)
1798 krb5_error_code ret
;
1799 struct samba_kdc_seq
*priv
= kdc_db_ctx
->seq_ctx
;
1800 const char *realm
= lpcfg_realm(kdc_db_ctx
->lp_ctx
);
1801 struct ldb_message
*msg
= NULL
;
1802 const char *sAMAccountName
= NULL
;
1803 krb5_principal principal
= NULL
;
1804 TALLOC_CTX
*mem_ctx
;
1807 return HDB_ERR_NOENTRY
;
1810 mem_ctx
= talloc_named(priv
, 0, "samba_kdc_seq context");
1814 krb5_set_error_message(context
, ret
, "samba_kdc_seq: talloc_named() failed!");
1818 while (priv
->index
< priv
->count
) {
1819 msg
= priv
->msgs
[priv
->index
++];
1821 sAMAccountName
= ldb_msg_find_attr_as_string(msg
, "sAMAccountName", NULL
);
1822 if (sAMAccountName
!= NULL
) {
1827 if (sAMAccountName
== NULL
) {
1828 ret
= HDB_ERR_NOENTRY
;
1832 ret
= smb_krb5_make_principal(context
, &principal
,
1833 realm
, sAMAccountName
, NULL
);
1838 ret
= samba_kdc_message2entry(context
, kdc_db_ctx
, mem_ctx
,
1839 principal
, SAMBA_KDC_ENT_TYPE_ANY
,
1840 HDB_F_ADMIN_DATA
|HDB_F_GET_ANY
,
1841 priv
->realm_dn
, msg
, entry
);
1844 if (principal
!= NULL
) {
1845 krb5_free_principal(context
, principal
);
1850 kdc_db_ctx
->seq_ctx
= NULL
;
1852 talloc_free(mem_ctx
);
1858 krb5_error_code
samba_kdc_firstkey(krb5_context context
,
1859 struct samba_kdc_db_context
*kdc_db_ctx
,
1860 hdb_entry_ex
*entry
)
1862 struct ldb_context
*ldb_ctx
= kdc_db_ctx
->samdb
;
1863 struct samba_kdc_seq
*priv
= kdc_db_ctx
->seq_ctx
;
1865 struct ldb_result
*res
= NULL
;
1866 krb5_error_code ret
;
1867 TALLOC_CTX
*mem_ctx
;
1872 kdc_db_ctx
->seq_ctx
= NULL
;
1875 priv
= (struct samba_kdc_seq
*) talloc(kdc_db_ctx
, struct samba_kdc_seq
);
1878 krb5_set_error_message(context
, ret
, "talloc: out of memory");
1884 priv
->realm_dn
= ldb_get_default_basedn(ldb_ctx
);
1887 mem_ctx
= talloc_named(priv
, 0, "samba_kdc_firstkey context");
1891 krb5_set_error_message(context
, ret
, "samba_kdc_firstkey: talloc_named() failed!");
1895 ret
= krb5_get_default_realm(context
, &realm
);
1900 krb5_free_default_realm(context
, realm
);
1902 lret
= dsdb_search(ldb_ctx
, priv
, &res
,
1903 priv
->realm_dn
, LDB_SCOPE_SUBTREE
, user_attrs
,
1904 DSDB_SEARCH_NO_GLOBAL_CATALOG
,
1905 "(objectClass=user)");
1907 if (lret
!= LDB_SUCCESS
) {
1909 return HDB_ERR_NOENTRY
;
1912 priv
->count
= res
->count
;
1913 priv
->msgs
= talloc_steal(priv
, res
->msgs
);
1916 kdc_db_ctx
->seq_ctx
= priv
;
1918 ret
= samba_kdc_seq(context
, kdc_db_ctx
, entry
);
1922 kdc_db_ctx
->seq_ctx
= NULL
;
1924 talloc_free(mem_ctx
);
1929 krb5_error_code
samba_kdc_nextkey(krb5_context context
,
1930 struct samba_kdc_db_context
*kdc_db_ctx
,
1931 hdb_entry_ex
*entry
)
1933 return samba_kdc_seq(context
, kdc_db_ctx
, entry
);
1936 /* Check if a given entry may delegate or do s4u2self to this target principal
1938 * This is currently a very nasty hack - allowing only delegation to itself.
1941 samba_kdc_check_s4u2self(krb5_context context
,
1942 struct samba_kdc_db_context
*kdc_db_ctx
,
1943 struct samba_kdc_entry
*skdc_entry
,
1944 krb5_const_principal target_principal
)
1946 krb5_error_code ret
;
1947 struct ldb_dn
*realm_dn
;
1948 struct ldb_message
*msg
;
1949 struct dom_sid
*orig_sid
;
1950 struct dom_sid
*target_sid
;
1951 const char *delegation_check_attrs
[] = {
1955 TALLOC_CTX
*mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_check_s4u2self");
1959 krb5_set_error_message(context
, ret
, "samba_kdc_check_s4u2self: talloc_named() failed!");
1963 ret
= samba_kdc_lookup_server(context
, kdc_db_ctx
, mem_ctx
, target_principal
,
1964 HDB_F_GET_CLIENT
|HDB_F_GET_SERVER
,
1965 delegation_check_attrs
, &realm_dn
, &msg
);
1968 talloc_free(mem_ctx
);
1972 orig_sid
= samdb_result_dom_sid(mem_ctx
, skdc_entry
->msg
, "objectSid");
1973 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
1975 /* Allow delegation to the same principal, even if by a different
1976 * name. The easy and safe way to prove this is by SID
1978 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
1979 talloc_free(mem_ctx
);
1980 return KRB5KDC_ERR_BADOPTION
;
1983 talloc_free(mem_ctx
);
1987 /* Certificates printed by a the Certificate Authority might have a
1988 * slightly different form of the user principal name to that in the
1989 * database. Allow a mismatch where they both refer to the same
1993 samba_kdc_check_pkinit_ms_upn_match(krb5_context context
,
1994 struct samba_kdc_db_context
*kdc_db_ctx
,
1995 struct samba_kdc_entry
*skdc_entry
,
1996 krb5_const_principal certificate_principal
)
1998 krb5_error_code ret
;
1999 struct ldb_dn
*realm_dn
;
2000 struct ldb_message
*msg
;
2001 struct dom_sid
*orig_sid
;
2002 struct dom_sid
*target_sid
;
2003 const char *ms_upn_check_attrs
[] = {
2007 TALLOC_CTX
*mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_check_pkinit_ms_upn_match");
2011 krb5_set_error_message(context
, ret
, "samba_kdc_fetch: talloc_named() failed!");
2015 ret
= samba_kdc_lookup_client(context
, kdc_db_ctx
,
2016 mem_ctx
, certificate_principal
,
2017 ms_upn_check_attrs
, &realm_dn
, &msg
);
2020 talloc_free(mem_ctx
);
2024 orig_sid
= samdb_result_dom_sid(mem_ctx
, skdc_entry
->msg
, "objectSid");
2025 target_sid
= samdb_result_dom_sid(mem_ctx
, msg
, "objectSid");
2027 /* Consider these to be the same principal, even if by a different
2028 * name. The easy and safe way to prove this is by SID
2030 if (!(orig_sid
&& target_sid
&& dom_sid_equal(orig_sid
, target_sid
))) {
2031 talloc_free(mem_ctx
);
2032 #ifdef KRB5_KDC_ERR_CLIENT_NAME_MISMATCH /* Heimdal */
2033 return KRB5_KDC_ERR_CLIENT_NAME_MISMATCH
;
2034 #elif defined(KRB5KDC_ERR_CLIENT_NAME_MISMATCH) /* MIT */
2035 return KRB5KDC_ERR_CLIENT_NAME_MISMATCH
;
2039 talloc_free(mem_ctx
);
2044 * Check if a given entry may delegate to this target principal
2048 samba_kdc_check_s4u2proxy(krb5_context context
,
2049 struct samba_kdc_db_context
*kdc_db_ctx
,
2050 struct samba_kdc_entry
*skdc_entry
,
2051 krb5_const_principal target_principal
)
2053 krb5_error_code ret
;
2055 const char *client_dn
= NULL
;
2056 const char *target_principal_name
= NULL
;
2057 struct ldb_message_element
*el
;
2062 TALLOC_CTX
*mem_ctx
= talloc_named(kdc_db_ctx
, 0, "samba_kdc_check_s4u2proxy");
2066 krb5_set_error_message(context
, ret
,
2067 "samba_kdc_check_s4u2proxy:"
2068 " talloc_named() failed!");
2072 client_dn
= ldb_dn_get_linearized(skdc_entry
->msg
->dn
);
2078 krb5_set_error_message(context
, ret
,
2079 "samba_kdc_check_s4u2proxy:"
2080 " ldb_dn_get_linearized() failed!");
2085 * The main heimdal code already checked that the target_principal
2086 * belongs to the same realm as the client.
2088 * So we just need the principal without the realm,
2089 * as that is what is configured in the "msDS-AllowedToDelegateTo"
2092 ret
= krb5_unparse_name_flags(context
, target_principal
,
2093 KRB5_PRINCIPAL_UNPARSE_NO_REALM
, &tmp
);
2095 talloc_free(mem_ctx
);
2096 krb5_set_error_message(context
, ret
,
2097 "samba_kdc_check_s4u2proxy:"
2098 " krb5_unparse_name() failed!");
2101 DEBUG(10,("samba_kdc_check_s4u2proxy: client[%s] for target[%s]\n",
2104 target_principal_name
= talloc_strdup(mem_ctx
, tmp
);
2106 if (target_principal_name
== NULL
) {
2108 krb5_set_error_message(context
, ret
,
2109 "samba_kdc_check_s4u2proxy:"
2110 " talloc_strdup() failed!");
2114 el
= ldb_msg_find_element(skdc_entry
->msg
, "msDS-AllowedToDelegateTo");
2119 val
= data_blob_string_const(target_principal_name
);
2121 for (i
=0; i
<el
->num_values
; i
++) {
2122 struct ldb_val
*val1
= &val
;
2123 struct ldb_val
*val2
= &el
->values
[i
];
2126 if (val1
->length
!= val2
->length
) {
2130 cmp
= strncasecmp((const char *)val1
->data
,
2131 (const char *)val2
->data
,
2145 DEBUG(10,("samba_kdc_check_s4u2proxy: client[%s] allowed target[%s]\n",
2147 talloc_free(mem_ctx
);
2151 krb5_set_error_message(context
, ret
,
2152 "samba_kdc_check_s4u2proxy: client[%s] "
2153 "not allowed for delegation to target[%s]",
2155 target_principal_name
);
2156 talloc_free(mem_ctx
);
2157 return KRB5KDC_ERR_BADOPTION
;
2160 NTSTATUS
samba_kdc_setup_db_ctx(TALLOC_CTX
*mem_ctx
, struct samba_kdc_base_context
*base_ctx
,
2161 struct samba_kdc_db_context
**kdc_db_ctx_out
)
2164 struct ldb_message
*msg
;
2165 struct auth_session_info
*session_info
;
2166 struct samba_kdc_db_context
*kdc_db_ctx
;
2167 /* The idea here is very simple. Using Kerberos to
2168 * authenticate the KDC to the LDAP server is higly likely to
2171 * In future we may set this up to use EXERNAL and SSL
2172 * certificates, for now it will almost certainly be NTLMSSP_SET_USERNAME
2175 kdc_db_ctx
= talloc_zero(mem_ctx
, struct samba_kdc_db_context
);
2176 if (kdc_db_ctx
== NULL
) {
2177 return NT_STATUS_NO_MEMORY
;
2179 kdc_db_ctx
->ev_ctx
= base_ctx
->ev_ctx
;
2180 kdc_db_ctx
->lp_ctx
= base_ctx
->lp_ctx
;
2182 /* get default kdc policy */
2183 lpcfg_default_kdc_policy(base_ctx
->lp_ctx
,
2184 &kdc_db_ctx
->policy
.svc_tkt_lifetime
,
2185 &kdc_db_ctx
->policy
.usr_tkt_lifetime
,
2186 &kdc_db_ctx
->policy
.renewal_lifetime
);
2188 session_info
= system_session(kdc_db_ctx
->lp_ctx
);
2189 if (session_info
== NULL
) {
2190 return NT_STATUS_INTERNAL_ERROR
;
2193 /* Setup the link to LDB */
2194 kdc_db_ctx
->samdb
= samdb_connect(kdc_db_ctx
, base_ctx
->ev_ctx
,
2195 base_ctx
->lp_ctx
, session_info
, 0);
2196 if (kdc_db_ctx
->samdb
== NULL
) {
2197 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot open samdb for KDC backend!"));
2198 talloc_free(kdc_db_ctx
);
2199 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2202 /* Find out our own krbtgt kvno */
2203 ldb_ret
= samdb_rodc(kdc_db_ctx
->samdb
, &kdc_db_ctx
->rodc
);
2204 if (ldb_ret
!= LDB_SUCCESS
) {
2205 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot determine if we are an RODC in KDC backend: %s\n",
2206 ldb_errstring(kdc_db_ctx
->samdb
)));
2207 talloc_free(kdc_db_ctx
);
2208 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2210 if (kdc_db_ctx
->rodc
) {
2211 int my_krbtgt_number
;
2212 const char *secondary_keytab
[] = { "msDS-SecondaryKrbTgtNumber", NULL
};
2213 struct ldb_dn
*account_dn
;
2214 struct ldb_dn
*server_dn
= samdb_server_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
);
2216 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot determine server DN in KDC backend: %s\n",
2217 ldb_errstring(kdc_db_ctx
->samdb
)));
2218 talloc_free(kdc_db_ctx
);
2219 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2222 ldb_ret
= samdb_reference_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
, server_dn
,
2223 "serverReference", &account_dn
);
2224 if (ldb_ret
!= LDB_SUCCESS
) {
2225 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot determine server account in KDC backend: %s\n",
2226 ldb_errstring(kdc_db_ctx
->samdb
)));
2227 talloc_free(kdc_db_ctx
);
2228 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2231 ldb_ret
= samdb_reference_dn(kdc_db_ctx
->samdb
, kdc_db_ctx
, account_dn
,
2232 "msDS-KrbTgtLink", &kdc_db_ctx
->krbtgt_dn
);
2233 talloc_free(account_dn
);
2234 if (ldb_ret
!= LDB_SUCCESS
) {
2235 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot determine RODC krbtgt account in KDC backend: %s\n",
2236 ldb_errstring(kdc_db_ctx
->samdb
)));
2237 talloc_free(kdc_db_ctx
);
2238 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2241 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
, kdc_db_ctx
,
2242 &msg
, kdc_db_ctx
->krbtgt_dn
, LDB_SCOPE_BASE
,
2244 DSDB_SEARCH_NO_GLOBAL_CATALOG
,
2245 "(&(objectClass=user)(msDS-SecondaryKrbTgtNumber=*))");
2246 if (ldb_ret
!= LDB_SUCCESS
) {
2247 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot read krbtgt account %s in KDC backend to get msDS-SecondaryKrbTgtNumber: %s: %s\n",
2248 ldb_dn_get_linearized(kdc_db_ctx
->krbtgt_dn
),
2249 ldb_errstring(kdc_db_ctx
->samdb
),
2250 ldb_strerror(ldb_ret
)));
2251 talloc_free(kdc_db_ctx
);
2252 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2254 my_krbtgt_number
= ldb_msg_find_attr_as_int(msg
, "msDS-SecondaryKrbTgtNumber", -1);
2255 if (my_krbtgt_number
== -1) {
2256 DEBUG(1, ("samba_kdc_setup_db_ctx: Cannot read msDS-SecondaryKrbTgtNumber from krbtgt account %s in KDC backend: got %d\n",
2257 ldb_dn_get_linearized(kdc_db_ctx
->krbtgt_dn
),
2259 talloc_free(kdc_db_ctx
);
2260 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2262 kdc_db_ctx
->my_krbtgt_number
= my_krbtgt_number
;
2265 kdc_db_ctx
->my_krbtgt_number
= 0;
2266 ldb_ret
= dsdb_search_one(kdc_db_ctx
->samdb
, kdc_db_ctx
,
2268 ldb_get_default_basedn(kdc_db_ctx
->samdb
),
2271 DSDB_SEARCH_NO_GLOBAL_CATALOG
,
2272 "(&(objectClass=user)(samAccountName=krbtgt))");
2274 if (ldb_ret
!= LDB_SUCCESS
) {
2275 DEBUG(1, ("samba_kdc_fetch: could not find own KRBTGT in DB: %s\n", ldb_errstring(kdc_db_ctx
->samdb
)));
2276 talloc_free(kdc_db_ctx
);
2277 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
2279 kdc_db_ctx
->krbtgt_dn
= talloc_steal(kdc_db_ctx
, msg
->dn
);
2280 kdc_db_ctx
->my_krbtgt_number
= 0;
2283 *kdc_db_ctx_out
= kdc_db_ctx
;
2284 return NT_STATUS_OK
;