2 * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
3 * Copyright (c) 2004, Andrew Bartlett <abartlet@samba.org>.
4 * Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include "system/time.h"
38 #include "dsdb/common/flags.h"
40 #include "lib/ldb/include/ldb.h"
41 #include "lib/ldb/include/ldb_errors.h"
42 #include "librpc/gen_ndr/netlogon.h"
43 #include "auth/auth.h"
44 #include "auth/auth_sam.h"
46 #include "dsdb/samdb/samdb.h"
49 { HDB_LDB_ENT_TYPE_CLIENT, HDB_LDB_ENT_TYPE_SERVER,
50 HDB_LDB_ENT_TYPE_KRBTGT, HDB_LDB_ENT_TYPE_ANY };
52 static const char * const krb5_attrs[] = {
57 "servicePrincipalName",
69 "msDS-KeyVersionNumber",
73 static const char *realm_ref_attrs[] = {
79 static KerberosTime ldb_msg_find_krb5time_ldap_time(struct ldb_message *msg, const char *attr, KerberosTime default_val)
85 gentime = ldb_msg_find_attr_as_string(msg, attr, NULL);
89 tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
97 static HDBFlags uf2HDBFlags(krb5_context context, int userAccountControl, enum hdb_ldb_ent_type ent_type)
99 HDBFlags flags = int2HDBFlags(0);
101 /* we don't allow kadmin deletes */
104 /* mark the principal as invalid to start with */
109 /* All accounts are servers, but this may be disabled again in the caller */
112 /* Account types - clear the invalid bit if it turns out to be valid */
113 if (userAccountControl & UF_NORMAL_ACCOUNT) {
114 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
120 if (userAccountControl & UF_INTERDOMAIN_TRUST_ACCOUNT) {
121 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
126 if (userAccountControl & UF_WORKSTATION_TRUST_ACCOUNT) {
127 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
132 if (userAccountControl & UF_SERVER_TRUST_ACCOUNT) {
133 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
139 /* Not permitted to act as a client if disabled */
140 if (userAccountControl & UF_ACCOUNTDISABLE) {
143 if (userAccountControl & UF_LOCKOUT) {
147 if (userAccountControl & UF_PASSWORD_NOTREQD) {
152 UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
154 if (userAccountControl & UF_TEMP_DUPLICATE_ACCOUNT) {
158 /* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in LDB_message2entry() */
161 if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
165 if (userAccountControl & UF_SMARTCARD_REQUIRED) {
166 flags.require_hwauth = 1;
168 if (userAccountControl & UF_TRUSTED_FOR_DELEGATION) {
169 flags.ok_as_delegate = 1;
171 if (!(userAccountControl & UF_NOT_DELEGATED)) {
172 flags.forwardable = 1;
176 if (userAccountControl & UF_DONT_REQUIRE_PREAUTH) {
177 flags.require_preauth = 0;
179 flags.require_preauth = 1;
185 static int hdb_ldb_destrutor(struct hdb_ldb_private *private)
187 hdb_entry_ex *entry_ex = private->entry_ex;
188 free_hdb_entry(&entry_ex->entry);
192 static void hdb_ldb_free_entry(krb5_context context, hdb_entry_ex *entry_ex)
194 talloc_free(entry_ex->ctx);
198 * Construct an hdb_entry from a directory entry.
200 static krb5_error_code LDB_message2entry(krb5_context context, HDB *db,
201 TALLOC_CTX *mem_ctx, krb5_const_principal principal,
202 enum hdb_ldb_ent_type ent_type,
203 struct ldb_message *msg,
204 struct ldb_message *realm_ref_msg,
205 hdb_entry_ex *entry_ex)
207 unsigned int userAccountControl;
209 krb5_error_code ret = 0;
210 krb5_boolean is_computer = FALSE;
211 const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg, "dnsRoot", NULL);
212 char *realm = strupper_talloc(mem_ctx, dnsdomain);
213 struct ldb_dn *domain_dn = samdb_result_dn(mem_ctx, realm_ref_msg, "nCName", ldb_dn_new(mem_ctx));
215 struct hdb_ldb_private *private;
217 struct ldb_message_element *ldb_keys;
219 struct ldb_message_element *objectclasses;
220 struct ldb_val computer_val;
221 computer_val.data = discard_const_p(uint8_t,"computer");
222 computer_val.length = strlen((const char *)computer_val.data);
224 objectclasses = ldb_msg_find_element(msg, "objectClass");
226 if (objectclasses && ldb_msg_find_val(objectclasses, &computer_val)) {
230 memset(entry_ex, 0, sizeof(*entry_ex));
233 krb5_set_error_string(context, "talloc_strdup: out of memory");
238 private = talloc(mem_ctx, struct hdb_ldb_private);
244 private->entry_ex = entry_ex;
246 talloc_set_destructor(private, hdb_ldb_destrutor);
248 entry_ex->ctx = private;
249 entry_ex->free_entry = hdb_ldb_free_entry;
251 userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
254 entry_ex->entry.principal = malloc(sizeof(*(entry_ex->entry.principal)));
255 if (ent_type == HDB_LDB_ENT_TYPE_ANY && principal == NULL) {
256 const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
257 if (!samAccountName) {
258 krb5_set_error_string(context, "LDB_message2entry: no samAccountName present");
262 samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
263 krb5_make_principal(context, &entry_ex->entry.principal, realm, samAccountName, NULL);
266 ret = copy_Principal(principal, entry_ex->entry.principal);
268 krb5_clear_error_string(context);
272 /* While we have copied the client principal, tests
273 * show that Win2k3 returns the 'corrected' realm, not
274 * the client-specified realm. This code attempts to
275 * replace the client principal's realm with the one
276 * we determine from our records */
278 /* this has to be with malloc() */
279 strdup_realm = strdup(realm);
282 krb5_clear_error_string(context);
285 free(*krb5_princ_realm(context, entry_ex->entry.principal));
286 krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
289 entry_ex->entry.kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0);
291 entry_ex->entry.flags = uf2HDBFlags(context, userAccountControl, ent_type);
293 if (ent_type == HDB_LDB_ENT_TYPE_KRBTGT) {
294 entry_ex->entry.flags.invalid = 0;
295 entry_ex->entry.flags.server = 1;
296 entry_ex->entry.flags.forwardable = 1;
297 entry_ex->entry.flags.ok_as_delegate = 1;
300 if (lp_parm_bool(-1, "kdc", "require spn for service", True)) {
301 if (!is_computer && !ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL)) {
302 entry_ex->entry.flags.server = 0;
306 /* use 'whenCreated' */
307 entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
309 entry_ex->entry.created_by.principal = NULL;
311 entry_ex->entry.modified_by = (Event *) malloc(sizeof(Event));
312 if (entry_ex->entry.modified_by == NULL) {
313 krb5_set_error_string(context, "malloc: out of memory");
318 /* use 'whenChanged' */
319 entry_ex->entry.modified_by->time = ldb_msg_find_krb5time_ldap_time(msg, "whenChanged", 0);
321 entry_ex->entry.modified_by->principal = NULL;
323 entry_ex->entry.valid_start = NULL;
325 acct_expiry = samdb_result_nttime(msg, "accountExpires", (NTTIME)-1);
326 if ((acct_expiry == (NTTIME)-1) ||
327 (acct_expiry == 0x7FFFFFFFFFFFFFFFULL)) {
328 entry_ex->entry.valid_end = NULL;
330 entry_ex->entry.valid_end = malloc(sizeof(*entry_ex->entry.valid_end));
331 if (entry_ex->entry.valid_end == NULL) {
335 *entry_ex->entry.valid_end = nt_time_to_unix(acct_expiry);
338 if (ent_type != HDB_LDB_ENT_TYPE_KRBTGT) {
339 NTTIME must_change_time
340 = samdb_result_force_password_change((struct ldb_context *)db->hdb_db, mem_ctx,
342 if (must_change_time == 0x7FFFFFFFFFFFFFFFULL) {
343 entry_ex->entry.pw_end = NULL;
345 entry_ex->entry.pw_end = malloc(sizeof(*entry_ex->entry.pw_end));
346 if (entry_ex->entry.pw_end == NULL) {
350 *entry_ex->entry.pw_end = nt_time_to_unix(must_change_time);
353 entry_ex->entry.pw_end = NULL;
356 entry_ex->entry.max_life = NULL;
358 entry_ex->entry.max_renew = NULL;
360 entry_ex->entry.generation = NULL;
362 /* Get krb5Key from the db */
364 ldb_keys = ldb_msg_find_element(msg, "krb5Key");
367 /* oh, no password. Apparently (comment in
368 * hdb-ldap.c) this violates the ASN.1, but this
369 * allows an entry with no keys (yet). */
370 entry_ex->entry.keys.val = NULL;
371 entry_ex->entry.keys.len = 0;
373 /* allocate space to decode into */
374 entry_ex->entry.keys.val = calloc(ldb_keys->num_values, sizeof(Key));
375 if (entry_ex->entry.keys.val == NULL) {
380 entry_ex->entry.keys.len = 0;
382 /* Decode Kerberos keys into the hdb structure */
383 for (i=0; i < ldb_keys->num_values; i++) {
386 ret = decode_Key(ldb_keys->values[i].data, ldb_keys->values[i].length,
389 /* Could be bougus data in the entry, or out of memory */
393 if (userAccountControl & UF_USE_DES_KEY_ONLY) {
394 switch (key.key.keytype) {
396 entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
397 entry_ex->entry.keys.len++;
399 /* We must use DES keys only */
403 entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
404 entry_ex->entry.keys.len++;
409 entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
410 if (entry_ex->entry.etypes == NULL) {
411 krb5_clear_error_string(context);
415 entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
416 entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
417 if (entry_ex->entry.etypes->val == NULL) {
418 krb5_clear_error_string(context);
422 for (i=0; i < entry_ex->entry.etypes->len; i++) {
423 entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
427 private->msg = talloc_steal(private, msg);
428 private->realm_ref_msg = talloc_steal(private, realm_ref_msg);
429 private->samdb = (struct ldb_context *)db->hdb_db;
431 entry_ex->check_client_access = hdb_ldb_check_client_access;
432 entry_ex->authz_data_tgs_req = hdb_ldb_authz_data_tgs_req;
433 entry_ex->authz_data_as_req = hdb_ldb_authz_data_as_req;
437 /* This doesn't free ent itself, that is for the eventual caller to do */
438 hdb_free_entry(context, entry_ex);
440 talloc_steal(db, entry_ex->ctx);
446 static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_context *ldb_ctx,
448 krb5_const_principal principal,
449 enum hdb_ldb_ent_type ent_type,
450 const struct ldb_dn *realm_dn,
451 struct ldb_message ***pmsg)
456 const char * const *princ_attrs = krb5_attrs;
459 char *short_princ_talloc;
461 struct ldb_result *res = NULL;
463 ret = krb5_unparse_name_norealm(context, principal, &short_princ);
466 krb5_set_error_string(context, "LDB_lookup_principal: could not parse principal");
467 krb5_warnx(context, "LDB_lookup_principal: could not parse principal");
471 short_princ_talloc = talloc_strdup(mem_ctx, short_princ);
473 if (!short_princ_talloc) {
474 krb5_set_error_string(context, "LDB_lookup_principal: talloc_strdup() failed!");
479 case HDB_LDB_ENT_TYPE_CLIENT:
482 case HDB_LDB_ENT_TYPE_ANY:
485 case HDB_LDB_ENT_TYPE_KRBTGT:
486 filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
489 case HDB_LDB_ENT_TYPE_SERVER:
490 filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
496 krb5_set_error_string(context, "talloc_asprintf: out of memory");
500 lret = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_SUBTREE, filter, princ_attrs, &res);
502 if (lret != LDB_SUCCESS) {
503 DEBUG(3, ("Failed to search for %s: %s\n", filter, ldb_errstring(ldb_ctx)));
504 return HDB_ERR_NOENTRY;
505 } else if (res->count == 0 || res->count > 1) {
506 DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter, res->count));
508 return HDB_ERR_NOENTRY;
510 talloc_steal(mem_ctx, res->msgs);
516 static krb5_error_code LDB_lookup_realm(krb5_context context, struct ldb_context *ldb_ctx,
519 struct ldb_message ***pmsg)
522 char *cross_ref_filter;
523 struct ldb_result *cross_ref_res;
524 const struct ldb_dn *partitions_basedn = samdb_partitions_dn(ldb_ctx, mem_ctx);
526 cross_ref_filter = talloc_asprintf(mem_ctx,
527 "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
529 if (!cross_ref_filter) {
530 krb5_set_error_string(context, "asprintf: out of memory");
534 ret = ldb_search(ldb_ctx, partitions_basedn, LDB_SCOPE_SUBTREE, cross_ref_filter, realm_ref_attrs, &cross_ref_res);
536 if (ret != LDB_SUCCESS) {
537 DEBUG(3, ("Failed to search for %s: %s\n", cross_ref_filter, ldb_errstring(ldb_ctx)));
538 talloc_free(cross_ref_res);
539 return HDB_ERR_NOENTRY;
540 } else if (cross_ref_res->count == 0 || cross_ref_res->count > 1) {
541 DEBUG(3, ("Failed find a single entry for %s: got %d\n", cross_ref_filter, cross_ref_res->count));
542 talloc_free(cross_ref_res);
543 return HDB_ERR_NOENTRY;
547 *pmsg = cross_ref_res->msgs;
548 talloc_steal(mem_ctx, cross_ref_res->msgs);
550 talloc_free(cross_ref_res);
556 static krb5_error_code LDB_open(krb5_context context, HDB *db, int flags, mode_t mode)
558 if (db->hdb_master_key_set) {
559 krb5_warnx(context, "LDB_open: use of a master key incompatible with LDB\n");
560 krb5_set_error_string(context, "LDB_open: use of a master key incompatible with LDB\n");
561 return HDB_ERR_NOENTRY;
567 static krb5_error_code LDB_close(krb5_context context, HDB *db)
572 static krb5_error_code LDB_lock(krb5_context context, HDB *db, int operation)
577 static krb5_error_code LDB_unlock(krb5_context context, HDB *db)
582 static krb5_error_code LDB_rename(krb5_context context, HDB *db, const char *new_name)
584 return HDB_ERR_DB_INUSE;
587 static krb5_error_code LDB_fetch_client(krb5_context context, HDB *db,
589 krb5_const_principal principal,
591 hdb_entry_ex *entry_ex) {
593 char *principal_string;
595 struct ldb_message **msg = NULL;
596 struct ldb_message **realm_ref_msg = NULL;
598 ret = krb5_unparse_name(context, principal, &principal_string);
604 nt_status = sam_get_results_principal((struct ldb_context *)db->hdb_db,
605 mem_ctx, principal_string,
606 &msg, &realm_ref_msg);
607 free(principal_string);
608 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
609 return HDB_ERR_NOENTRY;
610 } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MEMORY)) {
612 } else if (!NT_STATUS_IS_OK(nt_status)) {
616 ret = LDB_message2entry(context, db, mem_ctx,
617 principal, HDB_LDB_ENT_TYPE_CLIENT,
618 msg[0], realm_ref_msg[0], entry_ex);
622 static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
624 krb5_const_principal principal,
626 hdb_entry_ex *entry_ex)
629 struct ldb_message **msg = NULL;
630 struct ldb_message **realm_ref_msg = NULL;
631 const struct ldb_dn *realm_dn;
633 krb5_principal alloc_principal = NULL;
634 if (principal->name.name_string.len != 2
635 || (strcmp(principal->name.name_string.val[0], KRB5_TGS_NAME) != 0)) {
637 return HDB_ERR_NOENTRY;
640 /* krbtgt case. Either us or a trusted realm */
641 if ((LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
642 mem_ctx, principal->name.name_string.val[1], &realm_ref_msg) == 0)) {
644 /* Cludge, cludge cludge. If the realm part of krbtgt/realm,
645 * is in our db, then direct the caller at our primary
648 const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg[0], "dnsRoot", NULL);
649 char *realm_fixed = strupper_talloc(mem_ctx, dnsdomain);
651 krb5_set_error_string(context, "strupper_talloc: out of memory");
655 ret = krb5_copy_principal(context, principal, &alloc_principal);
660 free(alloc_principal->name.name_string.val[1]);
661 alloc_principal->name.name_string.val[1] = strdup(realm_fixed);
662 talloc_free(realm_fixed);
663 if (!alloc_principal->name.name_string.val[1]) {
664 krb5_set_error_string(context, "LDB_fetch: strdup() failed!");
667 principal = alloc_principal;
668 realm_dn = samdb_result_dn(mem_ctx, realm_ref_msg[0], "nCName", NULL);
671 /* we should lookup trusted domains */
672 return HDB_ERR_NOENTRY;
675 realm_dn = samdb_result_dn(mem_ctx, realm_ref_msg[0], "nCName", NULL);
677 ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
679 principal, HDB_LDB_ENT_TYPE_KRBTGT, realm_dn, &msg);
682 krb5_warnx(context, "LDB_fetch: could not find principal in DB");
683 krb5_set_error_string(context, "LDB_fetch: could not find principal in DB");
687 ret = LDB_message2entry(context, db, mem_ctx,
688 principal, HDB_LDB_ENT_TYPE_KRBTGT,
689 msg[0], realm_ref_msg[0], entry_ex);
691 krb5_warnx(context, "LDB_fetch: message2entry failed");
696 static krb5_error_code LDB_fetch_server(krb5_context context, HDB *db,
698 krb5_const_principal principal,
700 hdb_entry_ex *entry_ex)
704 struct ldb_message **msg = NULL;
705 struct ldb_message **realm_ref_msg = NULL;
706 const struct ldb_dn *partitions_basedn = samdb_partitions_dn(db->hdb_db, mem_ctx);
707 if (principal->name.name_string.len >= 2) {
708 /* 'normal server' case */
711 struct ldb_dn *user_dn, *domain_dn;
712 char *principal_string;
714 ret = krb5_unparse_name_norealm(context, principal, &principal_string);
719 /* At this point we may find the host is known to be
720 * in a different realm, so we should generate a
721 * referral instead */
722 nt_status = crack_service_principal_name((struct ldb_context *)db->hdb_db,
723 mem_ctx, principal_string,
724 &user_dn, &domain_dn);
725 free(principal_string);
727 if (!NT_STATUS_IS_OK(nt_status)) {
728 return HDB_ERR_NOENTRY;
731 ldb_ret = gendb_search_dn((struct ldb_context *)db->hdb_db,
732 mem_ctx, user_dn, &msg, krb5_attrs);
735 return HDB_ERR_NOENTRY;
738 ldb_ret = gendb_search((struct ldb_context *)db->hdb_db,
739 mem_ctx, partitions_basedn, &realm_ref_msg, realm_ref_attrs,
740 "ncName=%s", ldb_dn_linearize(mem_ctx, domain_dn));
743 return HDB_ERR_NOENTRY;
747 const struct ldb_dn *realm_dn;
748 /* server as client principal case, but we must not lookup userPrincipalNames */
750 realm = krb5_principal_get_realm(context, principal);
752 ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
753 mem_ctx, realm, &realm_ref_msg);
755 return HDB_ERR_NOENTRY;
758 realm_dn = samdb_result_dn(mem_ctx, realm_ref_msg[0], "nCName", NULL);
760 ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
762 principal, HDB_LDB_ENT_TYPE_SERVER, realm_dn, &msg);
769 ret = LDB_message2entry(context, db, mem_ctx,
770 principal, HDB_LDB_ENT_TYPE_SERVER,
771 msg[0], realm_ref_msg[0], entry_ex);
773 krb5_warnx(context, "LDB_fetch: message2entry failed");
779 static krb5_error_code LDB_fetch(krb5_context context, HDB *db,
780 krb5_const_principal principal,
782 hdb_entry_ex *entry_ex)
784 krb5_error_code ret = HDB_ERR_NOENTRY;
786 TALLOC_CTX *mem_ctx = talloc_named(db, 0, "LDB_fetch context");
789 krb5_set_error_string(context, "LDB_fetch: talloc_named() failed!");
793 if (flags & HDB_F_GET_CLIENT) {
794 ret = LDB_fetch_client(context, db, mem_ctx, principal, flags, entry_ex);
795 if (ret != HDB_ERR_NOENTRY) goto done;
797 if (flags & HDB_F_GET_SERVER) {
798 ret = LDB_fetch_server(context, db, mem_ctx, principal, flags, entry_ex);
799 if (ret != HDB_ERR_NOENTRY) goto done;
800 ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
801 if (ret != HDB_ERR_NOENTRY) goto done;
803 if (flags & HDB_F_GET_KRBTGT) {
804 ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
805 if (ret != HDB_ERR_NOENTRY) goto done;
809 talloc_free(mem_ctx);
813 static krb5_error_code LDB_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
815 return HDB_ERR_DB_INUSE;
818 static krb5_error_code LDB_remove(krb5_context context, HDB *db, krb5_const_principal principal)
820 return HDB_ERR_DB_INUSE;
824 struct ldb_context *ctx;
827 struct ldb_message **msgs;
828 struct ldb_message **realm_ref_msgs;
831 static krb5_error_code LDB_seq(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
834 struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_openp;
836 hdb_entry_ex entry_ex;
837 memset(&entry_ex, '\0', sizeof(entry_ex));
840 return HDB_ERR_NOENTRY;
843 mem_ctx = talloc_named(priv, 0, "LDB_seq context");
846 krb5_set_error_string(context, "LDB_seq: talloc_named() failed!");
850 if (priv->index < priv->count) {
851 ret = LDB_message2entry(context, db, mem_ctx,
852 NULL, HDB_LDB_ENT_TYPE_ANY,
853 priv->msgs[priv->index++],
854 priv->realm_ref_msgs[0], entry);
856 ret = HDB_ERR_NOENTRY;
861 db->hdb_openp = NULL;
863 talloc_free(mem_ctx);
869 static krb5_error_code LDB_firstkey(krb5_context context, HDB *db, unsigned flags,
872 struct ldb_context *ldb_ctx = (struct ldb_context *)db->hdb_db;
873 struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_openp;
875 struct ldb_dn *realm_dn = NULL;
876 struct ldb_result *res = NULL;
877 struct ldb_message **realm_ref_msgs = NULL;
887 priv = (struct hdb_ldb_seq *) talloc(db, struct hdb_ldb_seq);
889 krb5_set_error_string(context, "talloc: out of memory");
896 priv->realm_ref_msgs = NULL;
899 mem_ctx = talloc_named(priv, 0, "LDB_firstkey context");
902 krb5_set_error_string(context, "LDB_firstkey: talloc_named() failed!");
906 ret = krb5_get_default_realm(context, &realm);
912 ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
913 mem_ctx, realm, &realm_ref_msgs);
919 krb5_warnx(context, "LDB_firstkey: could not find realm\n");
920 return HDB_ERR_NOENTRY;
923 realm_dn = samdb_result_dn(mem_ctx, realm_ref_msgs[0], "nCName", NULL);
925 priv->realm_ref_msgs = talloc_steal(priv, realm_ref_msgs);
927 lret = ldb_search(ldb_ctx, realm_dn,
928 LDB_SCOPE_SUBTREE, "(objectClass=user)",
931 if (lret != LDB_SUCCESS) {
933 return HDB_ERR_NOENTRY;
936 priv->count = res->count;
937 priv->msgs = talloc_steal(priv, res->msgs);
940 db->hdb_openp = priv;
942 ret = LDB_seq(context, db, flags, entry);
946 db->hdb_openp = NULL;
948 talloc_free(mem_ctx);
953 static krb5_error_code LDB_nextkey(krb5_context context, HDB *db, unsigned flags,
956 return LDB_seq(context, db, flags, entry);
959 static krb5_error_code LDB_destroy(krb5_context context, HDB *db)
965 /* This interface is to be called by the KDC, which is expecting Samba
966 * calling conventions. It is also called by a wrapper
967 * (hdb_ldb_create) from the kpasswdd -> krb5 -> keytab_hdb -> hdb
970 NTSTATUS kdc_hdb_ldb_create(TALLOC_CTX *mem_ctx,
971 krb5_context context, struct HDB **db, const char *arg)
974 struct auth_session_info *session_info;
975 *db = talloc(mem_ctx, HDB);
977 krb5_set_error_string(context, "malloc: out of memory");
978 return NT_STATUS_NO_MEMORY;
981 (*db)->hdb_master_key_set = 0;
982 (*db)->hdb_db = NULL;
984 nt_status = auth_system_session_info(*db, &session_info);
985 if (!NT_STATUS_IS_OK(nt_status)) {
989 /* The idea here is very simple. Using Kerberos to
990 * authenticate the KDC to the LDAP server is higly likely to
993 * In future we may set this up to use EXERNAL and SSL
994 * certificates, for now it will almost certainly be NTLMSSP
997 cli_credentials_set_kerberos_state(session_info->credentials,
998 CRED_DONT_USE_KERBEROS);
1000 /* Setup the link to LDB */
1001 (*db)->hdb_db = samdb_connect(*db, session_info);
1002 if ((*db)->hdb_db == NULL) {
1003 DEBUG(1, ("hdb_ldb_create: Cannot open samdb for KDC backend!"));
1004 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
1007 (*db)->hdb_openp = 0;
1008 (*db)->hdb_open = LDB_open;
1009 (*db)->hdb_close = LDB_close;
1010 (*db)->hdb_fetch = LDB_fetch;
1011 (*db)->hdb_store = LDB_store;
1012 (*db)->hdb_remove = LDB_remove;
1013 (*db)->hdb_firstkey = LDB_firstkey;
1014 (*db)->hdb_nextkey = LDB_nextkey;
1015 (*db)->hdb_lock = LDB_lock;
1016 (*db)->hdb_unlock = LDB_unlock;
1017 (*db)->hdb_rename = LDB_rename;
1018 /* we don't implement these, as we are not a lockable database */
1019 (*db)->hdb__get = NULL;
1020 (*db)->hdb__put = NULL;
1021 /* kadmin should not be used for deletes - use other tools instead */
1022 (*db)->hdb__del = NULL;
1023 (*db)->hdb_destroy = LDB_destroy;
1025 return NT_STATUS_OK;
1028 krb5_error_code hdb_ldb_create(krb5_context context, struct HDB **db, const char *arg)
1031 /* Disgusting, ugly hack, but it means one less private hook */
1032 nt_status = kdc_hdb_ldb_create(context->mem_ctx, context, db, arg);
1034 if (NT_STATUS_IS_OK(nt_status)) {