source4/kdc/hdb-ldb.c

   1 /*
   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>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  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.
  17  *
  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.
  21  *
  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
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "includes.h"
  36 #include "system/time.h"
  37 #include "dsdb/common/flags.h"
  38 #include "lib/ldb/include/ldb.h"
  39 #include "lib/ldb/include/ldb_errors.h"
  40 #include "librpc/gen_ndr/netlogon.h"
  41 #include "auth/auth.h"
  42 #include "auth/credentials/credentials.h"
  43 #include "auth/auth_sam.h"
  44 #include "util/util_ldb.h"
  45 #include "dsdb/samdb/samdb.h"
  46 #include "librpc/ndr/libndr.h"
  47 #include "librpc/gen_ndr/ndr_drsblobs.h"
  48 #include "libcli/auth/libcli_auth.h"
  49 #include "param/param.h"
  50 #include "events/events.h"
  51 #include "kdc/kdc.h"
  52
  53 enum hdb_ldb_ent_type
  54 { HDB_LDB_ENT_TYPE_CLIENT, HDB_LDB_ENT_TYPE_SERVER,
  55   HDB_LDB_ENT_TYPE_KRBTGT, HDB_LDB_ENT_TYPE_ANY };
  56
  57 static const char *realm_ref_attrs[] = {
  58         "nCName",
  59         "dnsRoot",
  60         NULL
  61 };
  62
  63 static KerberosTime ldb_msg_find_krb5time_ldap_time(struct ldb_message *msg, const char *attr, KerberosTime default_val)
  64 {
  65     const char *tmp;
  66     const char *gentime;
  67     struct tm tm;
  68
  69     gentime = ldb_msg_find_attr_as_string(msg, attr, NULL);
  70     if (!gentime)
  71         return default_val;
  72
  73     tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
  74     if (tmp == NULL) {
  75             return default_val;
  76     }
  77
  78     return timegm(&tm);
  79 }
  80
  81 static HDBFlags uf2HDBFlags(krb5_context context, int userAccountControl, enum hdb_ldb_ent_type ent_type)
  82 {
  83         HDBFlags flags = int2HDBFlags(0);
  84
  85         /* we don't allow kadmin deletes */
  86         flags.immutable = 1;
  87
  88         /* mark the principal as invalid to start with */
  89         flags.invalid = 1;
  90
  91         flags.renewable = 1;
  92
  93         /* All accounts are servers, but this may be disabled again in the caller */
  94         flags.server = 1;
  95
  96         /* Account types - clear the invalid bit if it turns out to be valid */
  97         if (userAccountControl & UF_NORMAL_ACCOUNT) {
  98                 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
  99                         flags.client = 1;
 100                 }
 101                 flags.invalid = 0;
 102         }
 103
 104         if (userAccountControl & UF_INTERDOMAIN_TRUST_ACCOUNT) {
 105                 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
 106                         flags.client = 1;
 107                 }
 108                 flags.invalid = 0;
 109         }
 110         if (userAccountControl & UF_WORKSTATION_TRUST_ACCOUNT) {
 111                 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
 112                         flags.client = 1;
 113                 }
 114                 flags.invalid = 0;
 115         }
 116         if (userAccountControl & UF_SERVER_TRUST_ACCOUNT) {
 117                 if (ent_type == HDB_LDB_ENT_TYPE_CLIENT || ent_type == HDB_LDB_ENT_TYPE_ANY) {
 118                         flags.client = 1;
 119                 }
 120                 flags.invalid = 0;
 121         }
 122
 123         /* Not permitted to act as a client if disabled */
 124         if (userAccountControl & UF_ACCOUNTDISABLE) {
 125                 flags.client = 0;
 126         }
 127         if (userAccountControl & UF_LOCKOUT) {
 128                 flags.invalid = 1;
 129         }
 130 /*
 131         if (userAccountControl & UF_PASSWORD_NOTREQD) {
 132                 flags.invalid = 1;
 133         }
 134 */
 135 /*
 136         UF_PASSWORD_CANT_CHANGE and UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED are irrelevent
 137 */
 138         if (userAccountControl & UF_TEMP_DUPLICATE_ACCOUNT) {
 139                 flags.invalid = 1;
 140         }
 141
 142 /* UF_DONT_EXPIRE_PASSWD and UF_USE_DES_KEY_ONLY handled in LDB_message2entry() */
 143
 144 /*
 145         if (userAccountControl & UF_MNS_LOGON_ACCOUNT) {
 146                 flags.invalid = 1;
 147         }
 148 */
 149         if (userAccountControl & UF_SMARTCARD_REQUIRED) {
 150                 flags.require_hwauth = 1;
 151         }
 152         if (userAccountControl & UF_TRUSTED_FOR_DELEGATION) {
 153                 flags.ok_as_delegate = 1;
 154         }
 155         if (!(userAccountControl & UF_NOT_DELEGATED)) {
 156                 flags.forwardable = 1;
 157                 flags.proxiable = 1;
 158         }
 159
 160         if (userAccountControl & UF_DONT_REQUIRE_PREAUTH) {
 161                 flags.require_preauth = 0;
 162         } else {
 163                 flags.require_preauth = 1;
 164
 165         }
 166         return flags;
 167 }
 168
 169 static int hdb_ldb_destrutor(struct hdb_ldb_private *private)
 170 {
 171     hdb_entry_ex *entry_ex = private->entry_ex;
 172     free_hdb_entry(&entry_ex->entry);
 173     return 0;
 174 }
 175
 176 static void hdb_ldb_free_entry(krb5_context context, hdb_entry_ex *entry_ex)
 177 {
 178         talloc_free(entry_ex->ctx);
 179 }
 180
 181 static krb5_error_code LDB_message2entry_keys(krb5_context context,
 182                                               struct smb_iconv_convenience *iconv_convenience,
 183                                               TALLOC_CTX *mem_ctx,
 184                                               struct ldb_message *msg,
 185                                               unsigned int userAccountControl,
 186                                               hdb_entry_ex *entry_ex)
 187 {
 188         krb5_error_code ret = 0;
 189         enum ndr_err_code ndr_err;
 190         struct samr_Password *hash;
 191         const struct ldb_val *sc_val;
 192         struct supplementalCredentialsBlob scb;
 193         struct supplementalCredentialsPackage *scp = NULL;
 194         struct package_PrimaryKerberosBlob _pkb;
 195         struct package_PrimaryKerberosCtr3 *pkb3 = NULL;
 196         uint32_t i;
 197         uint32_t allocated_keys = 0;
 198
 199         entry_ex->entry.keys.val = NULL;
 200         entry_ex->entry.keys.len = 0;
 201
 202         entry_ex->entry.kvno = ldb_msg_find_attr_as_int(msg, "msDS-KeyVersionNumber", 0);
 203
 204         /* Get keys from the db */
 205
 206         hash = samdb_result_hash(mem_ctx, msg, "unicodePwd");
 207         sc_val = ldb_msg_find_ldb_val(msg, "supplementalCredentials");
 208
 209         /* unicodePwd for enctype 0x17 (23) if present */
 210         if (hash) {
 211                 allocated_keys++;
 212         }
 213
 214         /* supplementalCredentials if present */
 215         if (sc_val) {
 216                 ndr_err = ndr_pull_struct_blob_all(sc_val, mem_ctx, iconv_convenience, &scb,
 217                                                    (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
 218                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 219                         dump_data(0, sc_val->data, sc_val->length);
 220                         ret = EINVAL;
 221                         goto out;
 222                 }
 223
 224                 for (i=0; i < scb.sub.num_packages; i++) {
 225                         if (scb.sub.packages[i].unknown1 != 0x00000001) {
 226                                 continue;
 227                         }
 228
 229                         if (strcmp("Primary:Kerberos", scb.sub.packages[i].name) != 0) {
 230                                 continue;
 231                         }
 232
 233                         if (!scb.sub.packages[i].data || !scb.sub.packages[i].data[0]) {
 234                                 continue;
 235                         }
 236
 237                         scp = &scb.sub.packages[i];
 238                         break;
 239                 }
 240         }
 241         /* Primary:Kerberos element of supplementalCredentials */
 242         if (scp) {
 243                 DATA_BLOB blob;
 244
 245                 blob = strhex_to_data_blob(scp->data);
 246                 if (!blob.data) {
 247                         ret = ENOMEM;
 248                         goto out;
 249                 }
 250                 talloc_steal(mem_ctx, blob.data);
 251
 252                 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
 253                 ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, iconv_convenience, &_pkb,
 254                                                (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 255                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 256                         krb5_set_error_string(context, "LDB_message2entry_keys: could not parse package_PrimaryKerberosBlob");
 257                         krb5_warnx(context, "LDB_message2entry_keys: could not parse package_PrimaryKerberosBlob");
 258                         ret = EINVAL;
 259                         goto out;
 260                 }
 261
 262                 if (_pkb.version != 3) {
 263                         krb5_set_error_string(context, "LDB_message2entry_keys: could not parse PrimaryKerberos not version 3");
 264                         krb5_warnx(context, "LDB_message2entry_keys: could not parse PrimaryKerberos not version 3");
 265                         ret = EINVAL;
 266                         goto out;
 267                 }
 268
 269                 pkb3 = &_pkb.ctr.ctr3;
 270
 271                 allocated_keys += pkb3->num_keys;
 272         }
 273
 274         if (allocated_keys == 0) {
 275                 /* oh, no password.  Apparently (comment in
 276                  * hdb-ldap.c) this violates the ASN.1, but this
 277                  * allows an entry with no keys (yet). */
 278                 return 0;
 279         }
 280
 281         /* allocate space to decode into */
 282         entry_ex->entry.keys.len = 0;
 283         entry_ex->entry.keys.val = calloc(allocated_keys, sizeof(Key));
 284         if (entry_ex->entry.keys.val == NULL) {
 285                 ret = ENOMEM;
 286                 goto out;
 287         }
 288
 289         if (hash && !(userAccountControl & UF_USE_DES_KEY_ONLY)) {
 290                 Key key;
 291
 292                 key.mkvno = 0;
 293                 key.salt = NULL; /* No salt for this enc type */
 294
 295                 ret = krb5_keyblock_init(context,
 296                                          ENCTYPE_ARCFOUR_HMAC_MD5,
 297                                          hash->hash, sizeof(hash->hash),
 298                                          &key.key);
 299                 if (ret) {
 300                         goto out;
 301                 }
 302
 303                 entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
 304                 entry_ex->entry.keys.len++;
 305         }
 306
 307         if (pkb3) {
 308                 for (i=0; i < pkb3->num_keys; i++) {
 309                         bool use = true;
 310                         Key key;
 311
 312                         if (!pkb3->keys[i].value) continue;
 313
 314                         if (userAccountControl & UF_USE_DES_KEY_ONLY) {
 315                                 switch (pkb3->keys[i].keytype) {
 316                                 case ENCTYPE_DES_CBC_CRC:
 317                                 case ENCTYPE_DES_CBC_MD5:
 318                                         break;
 319                                 default:
 320                                         use = false;
 321                                         break;
 322                                 }
 323                         }
 324
 325                         if (!use) continue;
 326
 327                         key.mkvno = 0;
 328
 329                         if (pkb3->salt.string) {
 330                                 DATA_BLOB salt;
 331
 332                                 salt = data_blob_string_const(pkb3->salt.string);
 333
 334                                 key.salt = calloc(1, sizeof(*key.salt));
 335                                 if (key.salt == NULL) {
 336                                         ret = ENOMEM;
 337                                         goto out;
 338                                 }
 339
 340                                 key.salt->type = hdb_pw_salt;
 341
 342                                 ret = krb5_data_copy(&key.salt->salt, salt.data, salt.length);
 343                                 if (ret) {
 344                                         free(key.salt);
 345                                         key.salt = NULL;
 346                                         goto out;
 347                                 }
 348                         }
 349
 350                         ret = krb5_keyblock_init(context,
 351                                                  pkb3->keys[i].keytype,
 352                                                  pkb3->keys[i].value->data,
 353                                                  pkb3->keys[i].value->length,
 354                                                  &key.key);
 355                         if (ret) {
 356                                 if (key.salt) {
 357                                         free_Salt(key.salt);
 358                                         free(key.salt);
 359                                         key.salt = NULL;
 360                                 }
 361                                 goto out;
 362                         }
 363
 364                         entry_ex->entry.keys.val[entry_ex->entry.keys.len] = key;
 365                         entry_ex->entry.keys.len++;
 366                 }
 367         }
 368
 369 out:
 370         if (ret != 0) {
 371                 entry_ex->entry.keys.len = 0;
 372         }
 373         if (entry_ex->entry.keys.len == 0 && entry_ex->entry.keys.val) {
 374                 free(entry_ex->entry.keys.val);
 375                 entry_ex->entry.keys.val = NULL;
 376         }
 377         return ret;
 378 }
 379
 380 /*
 381  * Construct an hdb_entry from a directory entry.
 382  */
 383 static krb5_error_code LDB_message2entry(krb5_context context, HDB *db,
 384                                          TALLOC_CTX *mem_ctx, krb5_const_principal principal,
 385                                          enum hdb_ldb_ent_type ent_type,
 386                                          struct ldb_message *msg,
 387                                          struct ldb_message *realm_ref_msg,
 388                                          hdb_entry_ex *entry_ex)
 389 {
 390         unsigned int userAccountControl;
 391         int i;
 392         krb5_error_code ret = 0;
 393         krb5_boolean is_computer = FALSE;
 394         const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg, "dnsRoot", NULL);
 395         char *realm = strupper_talloc(mem_ctx, dnsdomain);
 396         struct loadparm_context *lp_ctx = ldb_get_opaque((struct ldb_context *)db->hdb_db, "loadparm");
 397         struct ldb_dn *domain_dn = samdb_result_dn((struct ldb_context *)db->hdb_db,
 398                                                         mem_ctx,
 399                                                         realm_ref_msg,
 400                                                         "nCName",
 401                                                         ldb_dn_new(mem_ctx, (struct ldb_context *)db->hdb_db, NULL));
 402
 403         struct hdb_ldb_private *private;
 404         NTTIME acct_expiry;
 405
 406         struct ldb_message_element *objectclasses;
 407         struct ldb_val computer_val;
 408         computer_val.data = discard_const_p(uint8_t,"computer");
 409         computer_val.length = strlen((const char *)computer_val.data);
 410
 411         objectclasses = ldb_msg_find_element(msg, "objectClass");
 412
 413         if (objectclasses && ldb_msg_find_val(objectclasses, &computer_val)) {
 414                 is_computer = TRUE;
 415         }
 416
 417         memset(entry_ex, 0, sizeof(*entry_ex));
 418
 419         if (!realm) {
 420                 krb5_set_error_string(context, "talloc_strdup: out of memory");
 421                 ret = ENOMEM;
 422                 goto out;
 423         }
 424
 425         private = talloc(mem_ctx, struct hdb_ldb_private);
 426         if (!private) {
 427                 ret = ENOMEM;
 428                 goto out;
 429         }
 430
 431         private->entry_ex = entry_ex;
 432         private->iconv_convenience = lp_iconv_convenience(lp_ctx);
 433         private->netbios_name = lp_netbios_name(lp_ctx);
 434
 435         talloc_set_destructor(private, hdb_ldb_destrutor);
 436
 437         entry_ex->ctx = private;
 438         entry_ex->free_entry = hdb_ldb_free_entry;
 439
 440         userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
 441
 442
 443         entry_ex->entry.principal = malloc(sizeof(*(entry_ex->entry.principal)));
 444         if (ent_type == HDB_LDB_ENT_TYPE_ANY && principal == NULL) {
 445                 const char *samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
 446                 if (!samAccountName) {
 447                         krb5_set_error_string(context, "LDB_message2entry: no samAccountName present");
 448                         ret = ENOENT;
 449                         goto out;
 450                 }
 451                 samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
 452                 krb5_make_principal(context, &entry_ex->entry.principal, realm, samAccountName, NULL);
 453         } else {
 454                 char *strdup_realm;
 455                 ret = copy_Principal(principal, entry_ex->entry.principal);
 456                 if (ret) {
 457                         krb5_clear_error_string(context);
 458                         goto out;
 459                 }
 460
 461                 /* While we have copied the client principal, tests
 462                  * show that Win2k3 returns the 'corrected' realm, not
 463                  * the client-specified realm.  This code attempts to
 464                  * replace the client principal's realm with the one
 465                  * we determine from our records */
 466
 467                 /* this has to be with malloc() */
 468                 strdup_realm = strdup(realm);
 469                 if (!strdup_realm) {
 470                         ret = ENOMEM;
 471                         krb5_clear_error_string(context);
 472                         goto out;
 473                 }
 474                 free(*krb5_princ_realm(context, entry_ex->entry.principal));
 475                 krb5_princ_set_realm(context, entry_ex->entry.principal, &strdup_realm);
 476         }
 477
 478         entry_ex->entry.flags = uf2HDBFlags(context, userAccountControl, ent_type);
 479
 480         if (ent_type == HDB_LDB_ENT_TYPE_KRBTGT) {
 481                 entry_ex->entry.flags.invalid = 0;
 482                 entry_ex->entry.flags.server = 1;
 483                 entry_ex->entry.flags.forwardable = 1;
 484                 entry_ex->entry.flags.ok_as_delegate = 1;
 485         }
 486
 487         if (lp_parm_bool(lp_ctx, NULL, "kdc", "require spn for service", true)) {
 488                 if (!is_computer && !ldb_msg_find_attr_as_string(msg, "servicePrincipalName", NULL)) {
 489                         entry_ex->entry.flags.server = 0;
 490                 }
 491         }
 492
 493         /* use 'whenCreated' */
 494         entry_ex->entry.created_by.time = ldb_msg_find_krb5time_ldap_time(msg, "whenCreated", 0);
 495         /* use '???' */
 496         entry_ex->entry.created_by.principal = NULL;
 497
 498         entry_ex->entry.modified_by = (Event *) malloc(sizeof(Event));
 499         if (entry_ex->entry.modified_by == NULL) {
 500                 krb5_set_error_string(context, "malloc: out of memory");
 501                 ret = ENOMEM;
 502                 goto out;
 503         }
 504
 505         /* use 'whenChanged' */
 506         entry_ex->entry.modified_by->time = ldb_msg_find_krb5time_ldap_time(msg, "whenChanged", 0);
 507         /* use '???' */
 508         entry_ex->entry.modified_by->principal = NULL;
 509
 510         entry_ex->entry.valid_start = NULL;
 511
 512         acct_expiry = samdb_result_account_expires(msg);
 513         if (acct_expiry == 0x7FFFFFFFFFFFFFFFULL) {
 514                 entry_ex->entry.valid_end = NULL;
 515         } else {
 516                 entry_ex->entry.valid_end = malloc(sizeof(*entry_ex->entry.valid_end));
 517                 if (entry_ex->entry.valid_end == NULL) {
 518                         ret = ENOMEM;
 519                         goto out;
 520                 }
 521                 *entry_ex->entry.valid_end = nt_time_to_unix(acct_expiry);
 522         }
 523
 524         if (ent_type != HDB_LDB_ENT_TYPE_KRBTGT) {
 525                 NTTIME must_change_time
 526                         = samdb_result_force_password_change((struct ldb_context *)db->hdb_db, mem_ctx,
 527                                                              domain_dn, msg);
 528                 if (must_change_time == 0x7FFFFFFFFFFFFFFFULL) {
 529                         entry_ex->entry.pw_end = NULL;
 530                 } else {
 531                         entry_ex->entry.pw_end = malloc(sizeof(*entry_ex->entry.pw_end));
 532                         if (entry_ex->entry.pw_end == NULL) {
 533                                 ret = ENOMEM;
 534                                 goto out;
 535                         }
 536                         *entry_ex->entry.pw_end = nt_time_to_unix(must_change_time);
 537                 }
 538         } else {
 539                 entry_ex->entry.pw_end = NULL;
 540         }
 541
 542         entry_ex->entry.max_life = NULL;
 543
 544         entry_ex->entry.max_renew = NULL;
 545
 546         entry_ex->entry.generation = NULL;
 547
 548         /* Get keys from the db */
 549         ret = LDB_message2entry_keys(context, private->iconv_convenience, private, msg, userAccountControl, entry_ex);
 550         if (ret) {
 551                 /* Could be bougus data in the entry, or out of memory */
 552                 goto out;
 553         }
 554
 555         entry_ex->entry.etypes = malloc(sizeof(*(entry_ex->entry.etypes)));
 556         if (entry_ex->entry.etypes == NULL) {
 557                 krb5_clear_error_string(context);
 558                 ret = ENOMEM;
 559                 goto out;
 560         }
 561         entry_ex->entry.etypes->len = entry_ex->entry.keys.len;
 562         entry_ex->entry.etypes->val = calloc(entry_ex->entry.etypes->len, sizeof(int));
 563         if (entry_ex->entry.etypes->val == NULL) {
 564                 krb5_clear_error_string(context);
 565                 ret = ENOMEM;
 566                 goto out;
 567         }
 568         for (i=0; i < entry_ex->entry.etypes->len; i++) {
 569                 entry_ex->entry.etypes->val[i] = entry_ex->entry.keys.val[i].key.keytype;
 570         }
 571
 572
 573         private->msg = talloc_steal(private, msg);
 574         private->realm_ref_msg = talloc_steal(private, realm_ref_msg);
 575         private->samdb = (struct ldb_context *)db->hdb_db;
 576
 577 out:
 578         if (ret != 0) {
 579                 /* This doesn't free ent itself, that is for the eventual caller to do */
 580                 hdb_free_entry(context, entry_ex);
 581         } else {
 582                 talloc_steal(db, entry_ex->ctx);
 583         }
 584
 585         return ret;
 586 }
 587
 588 static krb5_error_code LDB_lookup_principal(krb5_context context, struct ldb_context *ldb_ctx,
 589                                             TALLOC_CTX *mem_ctx,
 590                                             krb5_const_principal principal,
 591                                             enum hdb_ldb_ent_type ent_type,
 592                                             struct ldb_dn *realm_dn,
 593                                             struct ldb_message ***pmsg)
 594 {
 595         krb5_error_code ret;
 596         int lret;
 597         char *filter = NULL;
 598         const char * const *princ_attrs = user_attrs;
 599
 600         char *short_princ;
 601         char *short_princ_talloc;
 602
 603         struct ldb_result *res = NULL;
 604
 605         ret = krb5_unparse_name_flags(context, principal,  KRB5_PRINCIPAL_UNPARSE_NO_REALM, &short_princ);
 606
 607         if (ret != 0) {
 608                 krb5_set_error_string(context, "LDB_lookup_principal: could not parse principal");
 609                 krb5_warnx(context, "LDB_lookup_principal: could not parse principal");
 610                 return ret;
 611         }
 612
 613         short_princ_talloc = talloc_strdup(mem_ctx, short_princ);
 614         free(short_princ);
 615         if (!short_princ_talloc) {
 616                 krb5_set_error_string(context, "LDB_lookup_principal: talloc_strdup() failed!");
 617                 return ENOMEM;
 618         }
 619
 620         switch (ent_type) {
 621         case HDB_LDB_ENT_TYPE_CLIENT:
 622                 /* Can't happen */
 623                 return EINVAL;
 624         case HDB_LDB_ENT_TYPE_ANY:
 625                 /* Can't happen */
 626                 return EINVAL;
 627         case HDB_LDB_ENT_TYPE_KRBTGT:
 628                 filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 629                                          KRB5_TGS_NAME);
 630                 break;
 631         case HDB_LDB_ENT_TYPE_SERVER:
 632                 filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 633                                          short_princ_talloc);
 634                 break;
 635         }
 636
 637         if (!filter) {
 638                 krb5_set_error_string(context, "talloc_asprintf: out of memory");
 639                 return ENOMEM;
 640         }
 641
 642         lret = ldb_search(ldb_ctx, realm_dn, LDB_SCOPE_SUBTREE, filter, princ_attrs, &res);
 643
 644         if (lret != LDB_SUCCESS) {
 645                 DEBUG(3, ("Failed to search for %s: %s\n", filter, ldb_errstring(ldb_ctx)));
 646                 return HDB_ERR_NOENTRY;
 647         } else if (res->count == 0 || res->count > 1) {
 648                 DEBUG(3, ("Failed find a single entry for %s: got %d\n", filter, res->count));
 649                 talloc_free(res);
 650                 return HDB_ERR_NOENTRY;
 651         }
 652         talloc_steal(mem_ctx, res->msgs);
 653         *pmsg = res->msgs;
 654         talloc_free(res);
 655         return 0;
 656 }
 657
 658 static krb5_error_code LDB_lookup_realm(krb5_context context, struct ldb_context *ldb_ctx,
 659                                         TALLOC_CTX *mem_ctx,
 660                                         const char *realm,
 661                                         struct ldb_message ***pmsg)
 662 {
 663         int ret;
 664         struct ldb_result *cross_ref_res;
 665         struct ldb_dn *partitions_basedn = samdb_partitions_dn(ldb_ctx, mem_ctx);
 666
 667         ret = ldb_search_exp_fmt(ldb_ctx, mem_ctx, &cross_ref_res,
 668                         partitions_basedn, LDB_SCOPE_SUBTREE, realm_ref_attrs,
 669                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 670                         realm, realm);
 671
 672         if (ret != LDB_SUCCESS) {
 673                 DEBUG(3, ("Failed to search to lookup realm(%s): %s\n", realm, ldb_errstring(ldb_ctx)));
 674                 talloc_free(cross_ref_res);
 675                 return HDB_ERR_NOENTRY;
 676         } else if (cross_ref_res->count == 0 || cross_ref_res->count > 1) {
 677                 DEBUG(3, ("Failed find a single entry for realm %s: got %d\n", realm, cross_ref_res->count));
 678                 talloc_free(cross_ref_res);
 679                 return HDB_ERR_NOENTRY;
 680         }
 681
 682         if (pmsg) {
 683                 *pmsg = cross_ref_res->msgs;
 684                 talloc_steal(mem_ctx, cross_ref_res->msgs);
 685         }
 686         talloc_free(cross_ref_res);
 687
 688         return 0;
 689 }
 690
 691
 692 static krb5_error_code LDB_open(krb5_context context, HDB *db, int flags, mode_t mode)
 693 {
 694         if (db->hdb_master_key_set) {
 695                 krb5_warnx(context, "LDB_open: use of a master key incompatible with LDB\n");
 696                 krb5_set_error_string(context, "LDB_open: use of a master key incompatible with LDB\n");
 697                 return HDB_ERR_NOENTRY;
 698         }
 699
 700         return 0;
 701 }
 702
 703 static krb5_error_code LDB_close(krb5_context context, HDB *db)
 704 {
 705         return 0;
 706 }
 707
 708 static krb5_error_code LDB_lock(krb5_context context, HDB *db, int operation)
 709 {
 710         return 0;
 711 }
 712
 713 static krb5_error_code LDB_unlock(krb5_context context, HDB *db)
 714 {
 715         return 0;
 716 }
 717
 718 static krb5_error_code LDB_rename(krb5_context context, HDB *db, const char *new_name)
 719 {
 720         return HDB_ERR_DB_INUSE;
 721 }
 722
 723 static krb5_error_code LDB_fetch_client(krb5_context context, HDB *db,
 724                                         TALLOC_CTX *mem_ctx,
 725                                         krb5_const_principal principal,
 726                                         unsigned flags,
 727                                         hdb_entry_ex *entry_ex) {
 728         NTSTATUS nt_status;
 729         char *principal_string;
 730         krb5_error_code ret;
 731         struct ldb_message **msg = NULL;
 732         struct ldb_message **realm_ref_msg = NULL;
 733
 734         ret = krb5_unparse_name(context, principal, &principal_string);
 735
 736         if (ret != 0) {
 737                 return ret;
 738         }
 739
 740         nt_status = sam_get_results_principal((struct ldb_context *)db->hdb_db,
 741                                               mem_ctx, principal_string,
 742                                               &msg, &realm_ref_msg);
 743         free(principal_string);
 744         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
 745                 return HDB_ERR_NOENTRY;
 746         } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MEMORY)) {
 747                 return ENOMEM;
 748         } else if (!NT_STATUS_IS_OK(nt_status)) {
 749                 return EINVAL;
 750         }
 751
 752         ret = LDB_message2entry(context, db, mem_ctx,
 753                                 principal, HDB_LDB_ENT_TYPE_CLIENT,
 754                                 msg[0], realm_ref_msg[0], entry_ex);
 755         return ret;
 756 }
 757
 758 static krb5_error_code LDB_fetch_krbtgt(krb5_context context, HDB *db,
 759                                         TALLOC_CTX *mem_ctx,
 760                                         krb5_const_principal principal,
 761                                         unsigned flags,
 762                                         hdb_entry_ex *entry_ex)
 763 {
 764         krb5_error_code ret;
 765         struct ldb_message **msg = NULL;
 766         struct ldb_message **realm_ref_msg = NULL;
 767         struct ldb_dn *realm_dn;
 768
 769         krb5_principal alloc_principal = NULL;
 770         if (principal->name.name_string.len != 2
 771             || (strcmp(principal->name.name_string.val[0], KRB5_TGS_NAME) != 0)) {
 772                 /* Not a krbtgt */
 773                 return HDB_ERR_NOENTRY;
 774         }
 775
 776         /* krbtgt case.  Either us or a trusted realm */
 777         if ((LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
 778                               mem_ctx, principal->name.name_string.val[1], &realm_ref_msg) == 0)) {
 779                 /* us */
 780                 /* Cludge, cludge cludge.  If the realm part of krbtgt/realm,
 781                  * is in our db, then direct the caller at our primary
 782                  * krgtgt */
 783
 784                 const char *dnsdomain = ldb_msg_find_attr_as_string(realm_ref_msg[0], "dnsRoot", NULL);
 785                 char *realm_fixed = strupper_talloc(mem_ctx, dnsdomain);
 786                 if (!realm_fixed) {
 787                         krb5_set_error_string(context, "strupper_talloc: out of memory");
 788                         return ENOMEM;
 789                 }
 790
 791                 ret = krb5_copy_principal(context, principal, &alloc_principal);
 792                 if (ret) {
 793                         return ret;
 794                 }
 795
 796                 free(alloc_principal->name.name_string.val[1]);
 797                 alloc_principal->name.name_string.val[1] = strdup(realm_fixed);
 798                 talloc_free(realm_fixed);
 799                 if (!alloc_principal->name.name_string.val[1]) {
 800                         krb5_set_error_string(context, "LDB_fetch: strdup() failed!");
 801                         return ENOMEM;
 802                 }
 803                 principal = alloc_principal;
 804                 realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msg[0], "nCName", NULL);
 805         } else {
 806                 /* we should lookup trusted domains */
 807                 return HDB_ERR_NOENTRY;
 808         }
 809
 810         realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msg[0], "nCName", NULL);
 811
 812         ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
 813                                    mem_ctx,
 814                                    principal, HDB_LDB_ENT_TYPE_KRBTGT, realm_dn, &msg);
 815
 816         if (ret != 0) {
 817                 krb5_warnx(context, "LDB_fetch: could not find principal in DB");
 818                 krb5_set_error_string(context, "LDB_fetch: could not find principal in DB");
 819                 return ret;
 820         }
 821
 822         ret = LDB_message2entry(context, db, mem_ctx,
 823                                 principal, HDB_LDB_ENT_TYPE_KRBTGT,
 824                                 msg[0], realm_ref_msg[0], entry_ex);
 825         if (ret != 0) {
 826                 krb5_warnx(context, "LDB_fetch: message2entry failed");
 827         }
 828         return ret;
 829 }
 830
 831 static krb5_error_code LDB_fetch_server(krb5_context context, HDB *db,
 832                                         TALLOC_CTX *mem_ctx,
 833                                         krb5_const_principal principal,
 834                                         unsigned flags,
 835                                         hdb_entry_ex *entry_ex)
 836 {
 837         krb5_error_code ret;
 838         const char *realm;
 839         struct ldb_message **msg = NULL;
 840         struct ldb_message **realm_ref_msg = NULL;
 841         struct ldb_dn *partitions_basedn = samdb_partitions_dn(db->hdb_db, mem_ctx);
 842         if (principal->name.name_string.len >= 2) {
 843                 /* 'normal server' case */
 844                 int ldb_ret;
 845                 NTSTATUS nt_status;
 846                 struct ldb_dn *user_dn, *domain_dn;
 847                 char *principal_string;
 848
 849                 ret = krb5_unparse_name_flags(context, principal,
 850                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM,
 851                                               &principal_string);
 852                 if (ret != 0) {
 853                         return ret;
 854                 }
 855
 856                 /* At this point we may find the host is known to be
 857                  * in a different realm, so we should generate a
 858                  * referral instead */
 859                 nt_status = crack_service_principal_name((struct ldb_context *)db->hdb_db,
 860                                                          mem_ctx, principal_string,
 861                                                          &user_dn, &domain_dn);
 862                 free(principal_string);
 863
 864                 if (!NT_STATUS_IS_OK(nt_status)) {
 865                         return HDB_ERR_NOENTRY;
 866                 }
 867
 868                 ldb_ret = gendb_search_dn((struct ldb_context *)db->hdb_db,
 869                                           mem_ctx, user_dn, &msg, user_attrs);
 870
 871                 if (ldb_ret != 1) {
 872                         return HDB_ERR_NOENTRY;
 873                 }
 874
 875                 ldb_ret = gendb_search((struct ldb_context *)db->hdb_db,
 876                                        mem_ctx, partitions_basedn, &realm_ref_msg, realm_ref_attrs,
 877                                        "ncName=%s", ldb_dn_get_linearized(domain_dn));
 878
 879                 if (ldb_ret != 1) {
 880                         return HDB_ERR_NOENTRY;
 881                 }
 882
 883         } else {
 884                 struct ldb_dn *realm_dn;
 885                 /* server as client principal case, but we must not lookup userPrincipalNames */
 886
 887                 realm = krb5_principal_get_realm(context, principal);
 888
 889                 ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
 890                                        mem_ctx, realm, &realm_ref_msg);
 891                 if (ret != 0) {
 892                         return HDB_ERR_NOENTRY;
 893                 }
 894
 895                 realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msg[0], "nCName", NULL);
 896
 897                 ret = LDB_lookup_principal(context, (struct ldb_context *)db->hdb_db,
 898                                            mem_ctx,
 899                                            principal, HDB_LDB_ENT_TYPE_SERVER, realm_dn, &msg);
 900
 901                 if (ret != 0) {
 902                         return ret;
 903                 }
 904         }
 905
 906         ret = LDB_message2entry(context, db, mem_ctx,
 907                                 principal, HDB_LDB_ENT_TYPE_SERVER,
 908                                 msg[0], realm_ref_msg[0], entry_ex);
 909         if (ret != 0) {
 910                 krb5_warnx(context, "LDB_fetch: message2entry failed");
 911         }
 912
 913         return ret;
 914 }
 915
 916 static krb5_error_code LDB_fetch(krb5_context context, HDB *db,
 917                                  krb5_const_principal principal,
 918                                  unsigned flags,
 919                                  hdb_entry_ex *entry_ex)
 920 {
 921         krb5_error_code ret = HDB_ERR_NOENTRY;
 922
 923         TALLOC_CTX *mem_ctx = talloc_named(db, 0, "LDB_fetch context");
 924
 925         if (!mem_ctx) {
 926                 krb5_set_error_string(context, "LDB_fetch: talloc_named() failed!");
 927                 return ENOMEM;
 928         }
 929
 930         if (flags & HDB_F_GET_CLIENT) {
 931                 ret = LDB_fetch_client(context, db, mem_ctx, principal, flags, entry_ex);
 932                 if (ret != HDB_ERR_NOENTRY) goto done;
 933         }
 934         if (flags & HDB_F_GET_SERVER) {
 935                 ret = LDB_fetch_server(context, db, mem_ctx, principal, flags, entry_ex);
 936                 if (ret != HDB_ERR_NOENTRY) goto done;
 937                 ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
 938                 if (ret != HDB_ERR_NOENTRY) goto done;
 939         }
 940         if (flags & HDB_F_GET_KRBTGT) {
 941                 ret = LDB_fetch_krbtgt(context, db, mem_ctx, principal, flags, entry_ex);
 942                 if (ret != HDB_ERR_NOENTRY) goto done;
 943         }
 944
 945 done:
 946         talloc_free(mem_ctx);
 947         return ret;
 948 }
 949
 950 static krb5_error_code LDB_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
 951 {
 952         return HDB_ERR_DB_INUSE;
 953 }
 954
 955 static krb5_error_code LDB_remove(krb5_context context, HDB *db, krb5_const_principal principal)
 956 {
 957         return HDB_ERR_DB_INUSE;
 958 }
 959
 960 struct hdb_ldb_seq {
 961         struct ldb_context *ctx;
 962         int index;
 963         int count;
 964         struct ldb_message **msgs;
 965         struct ldb_message **realm_ref_msgs;
 966 };
 967
 968 static krb5_error_code LDB_seq(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
 969 {
 970         krb5_error_code ret;
 971         struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_dbc;
 972         TALLOC_CTX *mem_ctx;
 973         hdb_entry_ex entry_ex;
 974         memset(&entry_ex, '\0', sizeof(entry_ex));
 975
 976         if (!priv) {
 977                 return HDB_ERR_NOENTRY;
 978         }
 979
 980         mem_ctx = talloc_named(priv, 0, "LDB_seq context");
 981
 982         if (!mem_ctx) {
 983                 krb5_set_error_string(context, "LDB_seq: talloc_named() failed!");
 984                 return ENOMEM;
 985         }
 986
 987         if (priv->index < priv->count) {
 988                 ret = LDB_message2entry(context, db, mem_ctx,
 989                                         NULL, HDB_LDB_ENT_TYPE_ANY,
 990                                         priv->msgs[priv->index++],
 991                                         priv->realm_ref_msgs[0], entry);
 992         } else {
 993                 ret = HDB_ERR_NOENTRY;
 994         }
 995
 996         if (ret != 0) {
 997                 talloc_free(priv);
 998                 db->hdb_dbc = NULL;
 999         } else {
1000                 talloc_free(mem_ctx);
1001         }
1002
1003         return ret;
1004 }
1005
1006 static krb5_error_code LDB_firstkey(krb5_context context, HDB *db, unsigned flags,
1007                                         hdb_entry_ex *entry)
1008 {
1009         struct ldb_context *ldb_ctx = (struct ldb_context *)db->hdb_db;
1010         struct hdb_ldb_seq *priv = (struct hdb_ldb_seq *)db->hdb_dbc;
1011         char *realm;
1012         struct ldb_dn *realm_dn = NULL;
1013         struct ldb_result *res = NULL;
1014         struct ldb_message **realm_ref_msgs = NULL;
1015         krb5_error_code ret;
1016         TALLOC_CTX *mem_ctx;
1017         int lret;
1018
1019         if (priv) {
1020                 talloc_free(priv);
1021                 db->hdb_dbc = NULL;
1022         }
1023
1024         priv = (struct hdb_ldb_seq *) talloc(db, struct hdb_ldb_seq);
1025         if (!priv) {
1026                 krb5_set_error_string(context, "talloc: out of memory");
1027                 return ENOMEM;
1028         }
1029
1030         priv->ctx = ldb_ctx;
1031         priv->index = 0;
1032         priv->msgs = NULL;
1033         priv->realm_ref_msgs = NULL;
1034         priv->count = 0;
1035
1036         mem_ctx = talloc_named(priv, 0, "LDB_firstkey context");
1037
1038         if (!mem_ctx) {
1039                 krb5_set_error_string(context, "LDB_firstkey: talloc_named() failed!");
1040                 return ENOMEM;
1041         }
1042
1043         ret = krb5_get_default_realm(context, &realm);
1044         if (ret != 0) {
1045                 talloc_free(priv);
1046                 return ret;
1047         }
1048
1049         ret = LDB_lookup_realm(context, (struct ldb_context *)db->hdb_db,
1050                                mem_ctx, realm, &realm_ref_msgs);
1051
1052         free(realm);
1053
1054         if (ret != 0) {
1055                 talloc_free(priv);
1056                 krb5_warnx(context, "LDB_firstkey: could not find realm\n");
1057                 return HDB_ERR_NOENTRY;
1058         }
1059
1060         realm_dn = samdb_result_dn((struct ldb_context *)db->hdb_db, mem_ctx, realm_ref_msgs[0], "nCName", NULL);
1061
1062         priv->realm_ref_msgs = talloc_steal(priv, realm_ref_msgs);
1063
1064         lret = ldb_search(ldb_ctx, realm_dn,
1065                                  LDB_SCOPE_SUBTREE, "(objectClass=user)",
1066                                  user_attrs, &res);
1067
1068         if (lret != LDB_SUCCESS) {
1069                 talloc_free(priv);
1070                 return HDB_ERR_NOENTRY;
1071         }
1072
1073         priv->count = res->count;
1074         priv->msgs = talloc_steal(priv, res->msgs);
1075         talloc_free(res);
1076
1077         db->hdb_dbc = priv;
1078
1079         ret = LDB_seq(context, db, flags, entry);
1080
1081         if (ret != 0) {
1082                 talloc_free(priv);
1083                 db->hdb_dbc = NULL;
1084         } else {
1085                 talloc_free(mem_ctx);
1086         }
1087         return ret;
1088 }
1089
1090 static krb5_error_code LDB_nextkey(krb5_context context, HDB *db, unsigned flags,
1091                                    hdb_entry_ex *entry)
1092 {
1093         return LDB_seq(context, db, flags, entry);
1094 }
1095
1096 static krb5_error_code LDB_destroy(krb5_context context, HDB *db)
1097 {
1098         talloc_free(db);
1099         return 0;
1100 }
1101
1102 /* This interface is to be called by the KDC, which is expecting Samba
1103  * calling conventions.  It is also called by a wrapper
1104  * (hdb_ldb_create) from the kpasswdd -> krb5 -> keytab_hdb -> hdb
1105  * code */
1106
1107 NTSTATUS kdc_hdb_ldb_create(TALLOC_CTX *mem_ctx,
1108                             struct event_context *ev_ctx,
1109                             struct loadparm_context *lp_ctx,
1110                             krb5_context context, struct HDB **db, const char *arg)
1111 {
1112         NTSTATUS nt_status;
1113         struct auth_session_info *session_info;
1114         *db = talloc(mem_ctx, HDB);
1115         if (!*db) {
1116                 krb5_set_error_string(context, "malloc: out of memory");
1117                 return NT_STATUS_NO_MEMORY;
1118         }
1119
1120         (*db)->hdb_master_key_set = 0;
1121         (*db)->hdb_db = NULL;
1122
1123         nt_status = auth_system_session_info(*db, lp_ctx, &session_info);
1124         if (!NT_STATUS_IS_OK(nt_status)) {
1125                 return nt_status;
1126         }
1127
1128         /* The idea here is very simple.  Using Kerberos to
1129          * authenticate the KDC to the LDAP server is higly likely to
1130          * be circular.
1131          *
1132          * In future we may set this up to use EXERNAL and SSL
1133          * certificates, for now it will almost certainly be NTLMSSP
1134         */
1135
1136         cli_credentials_set_kerberos_state(session_info->credentials,
1137                                            CRED_DONT_USE_KERBEROS);
1138
1139         /* Setup the link to LDB */
1140         (*db)->hdb_db = samdb_connect(*db, ev_ctx, lp_ctx, session_info);
1141         if ((*db)->hdb_db == NULL) {
1142                 DEBUG(1, ("hdb_ldb_create: Cannot open samdb for KDC backend!"));
1143                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
1144         }
1145
1146         (*db)->hdb_dbc = NULL;
1147         (*db)->hdb_open = LDB_open;
1148         (*db)->hdb_close = LDB_close;
1149         (*db)->hdb_fetch = LDB_fetch;
1150         (*db)->hdb_store = LDB_store;
1151         (*db)->hdb_remove = LDB_remove;
1152         (*db)->hdb_firstkey = LDB_firstkey;
1153         (*db)->hdb_nextkey = LDB_nextkey;
1154         (*db)->hdb_lock = LDB_lock;
1155         (*db)->hdb_unlock = LDB_unlock;
1156         (*db)->hdb_rename = LDB_rename;
1157         /* we don't implement these, as we are not a lockable database */
1158         (*db)->hdb__get = NULL;
1159         (*db)->hdb__put = NULL;
1160         /* kadmin should not be used for deletes - use other tools instead */
1161         (*db)->hdb__del = NULL;
1162         (*db)->hdb_destroy = LDB_destroy;
1163
1164         return NT_STATUS_OK;
1165 }
1166
1167 krb5_error_code hdb_ldb_create(krb5_context context, struct HDB **db, const char *arg)
1168 {
1169         NTSTATUS nt_status;
1170         /* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
1171         nt_status = kdc_hdb_ldb_create(kdc_mem_ctx, event_context_find(kdc_mem_ctx), kdc_lp_ctx,
1172                                        context, db, arg);
1173
1174         if (NT_STATUS_IS_OK(nt_status)) {
1175                 return 0;
1176         }
1177         return EINVAL;
1178 }