source4/dsdb/samdb/cracknames.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    crachnames implementation for the drsuapi pipe
   5    DsCrackNames()
   6
   7    Copyright (C) Stefan Metzmacher 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   9    Copyright (C) Matthieu Patou <mat@matws.net> 2012
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "librpc/gen_ndr/drsuapi.h"
  27 #include "lib/events/events.h"
  28 #include <ldb.h>
  29 #include <ldb_errors.h>
  30 #include "auth/kerberos/kerberos.h"
  31 #include "libcli/ldap/ldap_ndr.h"
  32 #include "libcli/security/security.h"
  33 #include "auth/auth.h"
  34 #include "../lib/util/util_ldb.h"
  35 #include "dsdb/samdb/samdb.h"
  36 #include "dsdb/common/util.h"
  37 #include "param/param.h"
  38
  39 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  40                                    struct smb_krb5_context *smb_krb5_context,
  41                                    uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
  42                                    enum drsuapi_DsNameFormat format_desired,
  43                                    struct ldb_dn *name_dn, const char *name,
  44                                    const char *domain_filter, const char *result_filter,
  45                                    struct drsuapi_DsNameInfo1 *info1, int scope, struct ldb_dn *search_dn);
  46 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  47                                         enum drsuapi_DsNameFormat format_offered,
  48                                         enum drsuapi_DsNameFormat format_desired,
  49                                         struct ldb_dn *name_dn, const char *name,
  50                                         struct drsuapi_DsNameInfo1 *info1);
  51
  52 static WERROR dns_domain_from_principal(TALLOC_CTX *mem_ctx, struct smb_krb5_context *smb_krb5_context,
  53                                         const char *name,
  54                                         struct drsuapi_DsNameInfo1 *info1)
  55 {
  56         krb5_error_code ret;
  57         krb5_principal principal;
  58         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
  59         const char *realm;
  60         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
  61                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
  62         if (ret) {
  63                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  64                 return WERR_OK;
  65         }
  66
  67         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
  68         realm = smb_krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
  69
  70         info1->dns_domain_name  = talloc_strdup(mem_ctx, realm);
  71         krb5_free_principal(smb_krb5_context->krb5_context, principal);
  72
  73         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
  74
  75         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
  76         return WERR_OK;
  77 }
  78
  79 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  80                                                       TALLOC_CTX *mem_ctx,
  81                                                       const char *alias_from,
  82                                                       char **alias_to)
  83 {
  84         unsigned int i;
  85         int ret;
  86         struct ldb_result *res;
  87         struct ldb_message_element *spnmappings;
  88         TALLOC_CTX *tmp_ctx;
  89         struct ldb_dn *service_dn;
  90         char *service_dn_str;
  91
  92         const char *directory_attrs[] = {
  93                 "sPNMappings",
  94                 NULL
  95         };
  96
  97         tmp_ctx = talloc_new(mem_ctx);
  98         if (!tmp_ctx) {
  99                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 100         }
 101
 102         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
 103         if ( ! ldb_dn_add_base(service_dn, ldb_get_config_basedn(ldb_ctx))) {
 104                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 105         }
 106         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
 107         if ( ! service_dn_str) {
 108                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 109         }
 110
 111         ret = ldb_search(ldb_ctx, tmp_ctx, &res, service_dn, LDB_SCOPE_BASE,
 112                          directory_attrs, "(objectClass=nTDSService)");
 113
 114         if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) {
 115                 DEBUG(1, ("ldb_search: dn: %s not found: %s\n", service_dn_str, ldb_errstring(ldb_ctx)));
 116                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 117         } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 118                 DEBUG(1, ("ldb_search: dn: %s not found\n", service_dn_str));
 119                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 120         } else if (res->count != 1) {
 121                 talloc_free(res);
 122                 DEBUG(1, ("ldb_search: dn: %s not found\n", service_dn_str));
 123                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 124         }
 125
 126         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
 127         if (!spnmappings || spnmappings->num_values == 0) {
 128                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute\n", service_dn_str));
 129                 talloc_free(tmp_ctx);
 130                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 131         }
 132
 133         for (i = 0; i < spnmappings->num_values; i++) {
 134                 char *mapping, *p, *str;
 135                 mapping = talloc_strdup(tmp_ctx,
 136                                         (const char *)spnmappings->values[i].data);
 137                 if (!mapping) {
 138                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 139                         talloc_free(tmp_ctx);
 140                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 141                 }
 142
 143                 /* C string manipulation sucks */
 144
 145                 p = strchr(mapping, '=');
 146                 if (!p) {
 147                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 148                                   service_dn_str, mapping));
 149                         talloc_free(tmp_ctx);
 150                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 151                 }
 152                 p[0] = '\0';
 153                 p++;
 154                 do {
 155                         str = p;
 156                         p = strchr(p, ',');
 157                         if (p) {
 158                                 p[0] = '\0';
 159                                 p++;
 160                         }
 161                         if (strcasecmp(str, alias_from) == 0) {
 162                                 *alias_to = mapping;
 163                                 talloc_steal(mem_ctx, mapping);
 164                                 talloc_free(tmp_ctx);
 165                                 return DRSUAPI_DS_NAME_STATUS_OK;
 166                         }
 167                 } while (p);
 168         }
 169         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 170         talloc_free(tmp_ctx);
 171         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 172 }
 173
 174 /* When cracking a ServicePrincipalName, many services may be served
 175  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 176  * but we translate it here, and search on host/.  This is done after
 177  * the cifs/ entry has been searched for, making this a fallback */
 178
 179 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 180                                   struct smb_krb5_context *smb_krb5_context,
 181                                   uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 182                                   enum drsuapi_DsNameFormat format_desired,
 183                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 184 {
 185         WERROR wret;
 186         krb5_error_code ret;
 187         krb5_principal principal;
 188         const krb5_data *component;
 189         const char *service, *dns_name;
 190         char *new_service;
 191         char *new_princ;
 192         enum drsuapi_DsNameStatus namestatus;
 193
 194         /* parse principal */
 195         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 196                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 197         if (ret) {
 198                 DEBUG(2, ("Could not parse principal: %s: %s\n",
 199                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 200                                                            ret, mem_ctx)));
 201                 return WERR_NOMEM;
 202         }
 203
 204         /* grab cifs/, http/ etc */
 205
 206         /* This is checked for in callers, but be safe */
 207         if (krb5_princ_size(smb_krb5_context->krb5_context, principal) < 2) {
 208                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 209                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 210                 return WERR_OK;
 211         }
 212         component = krb5_princ_component(smb_krb5_context->krb5_context,
 213                                          principal, 0);
 214         service = (const char *)component->data;
 215         component = krb5_princ_component(smb_krb5_context->krb5_context,
 216                                          principal, 1);
 217         dns_name = (const char *)component->data;
 218
 219         /* MAP it */
 220         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 221                                           sam_ctx, mem_ctx,
 222                                           service, &new_service);
 223
 224         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 225                 wret = WERR_OK;
 226                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 227                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 228                 if (!info1->dns_domain_name) {
 229                         wret = WERR_NOMEM;
 230                 }
 231                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 232                 return wret;
 233         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 234                 info1->status = namestatus;
 235                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 236                 return WERR_OK;
 237         }
 238
 239         /* reform principal */
 240         new_princ = talloc_asprintf(mem_ctx, "%s/%s", new_service, dns_name);
 241         if (!new_princ) {
 242                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 243                 return WERR_NOMEM;
 244         }
 245
 246         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 247                                   new_princ, info1);
 248         talloc_free(new_princ);
 249         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
 250                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 251                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 252                 if (!info1->dns_domain_name) {
 253                         wret = WERR_NOMEM;
 254                 }
 255         }
 256         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 257         return wret;
 258 }
 259
 260 /* Subcase of CrackNames, for the userPrincipalName */
 261
 262 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 263                              struct smb_krb5_context *smb_krb5_context,
 264                              uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 265                              enum drsuapi_DsNameFormat format_desired,
 266                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 267 {
 268         int ldb_ret;
 269         WERROR status;
 270         const char *domain_filter = NULL;
 271         const char *result_filter = NULL;
 272         krb5_error_code ret;
 273         krb5_principal principal;
 274         const char *realm;
 275         char *unparsed_name_short;
 276         const char *domain_attrs[] = { NULL };
 277         struct ldb_result *domain_res = NULL;
 278
 279         /* Prevent recursion */
 280         if (!name) {
 281                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 282                 return WERR_OK;
 283         }
 284
 285         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 286                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
 287         if (ret) {
 288                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 289                 return WERR_OK;
 290         }
 291
 292         realm = smb_krb5_principal_get_realm(smb_krb5_context->krb5_context,
 293                                              principal);
 294
 295         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 296                              samdb_partitions_dn(sam_ctx, mem_ctx),
 297                              LDB_SCOPE_ONELEVEL,
 298                              domain_attrs,
 299                              "(&(objectClass=crossRef)(|(dnsRoot=%s)(netbiosName=%s))(systemFlags:%s:=%u))",
 300                              ldb_binary_encode_string(mem_ctx, realm),
 301                              ldb_binary_encode_string(mem_ctx, realm),
 302                              LDB_OID_COMPARATOR_AND,
 303                              SYSTEM_FLAG_CR_NTDS_DOMAIN);
 304
 305         if (ldb_ret != LDB_SUCCESS) {
 306                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
 307                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 308                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 309                 return WERR_OK;
 310         }
 311
 312         switch (domain_res->count) {
 313         case 1:
 314                 break;
 315         case 0:
 316                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 317                 return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 318                                                  name, info1);
 319         default:
 320                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 321                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 322                 return WERR_OK;
 323         }
 324
 325         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 326                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 327         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 328
 329         if (ret) {
 330                 free(unparsed_name_short);
 331                 return WERR_NOMEM;
 332         }
 333
 334         /* This may need to be extended for more userPrincipalName variations */
 335         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 336                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 337
 338         domain_filter = talloc_asprintf(mem_ctx, "(distinguishedName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
 339
 340         if (!result_filter || !domain_filter) {
 341                 free(unparsed_name_short);
 342                 return WERR_NOMEM;
 343         }
 344         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 345                                       smb_krb5_context,
 346                                       format_flags, format_offered, format_desired,
 347                                       NULL, unparsed_name_short, domain_filter, result_filter,
 348                                       info1, LDB_SCOPE_SUBTREE, NULL);
 349         free(unparsed_name_short);
 350
 351         return status;
 352 }
 353
 354 /*
 355  * This function will workout the filtering parameter in order to be able to do
 356  * the adapted search when the incomming format is format_functional.
 357  * This boils down to defining the search_dn (passed as pointer to ldb_dn *) and the
 358  * ldap filter request.
 359  * Main input parameters are:
 360  * * name, which is the portion of the functional name after the
 361  * first '/'.
 362  * * domain_filter, which is a ldap search filter used to find the NC DN given the
 363  * function name to crack.
 364  */
 365 static WERROR get_format_functional_filtering_param(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 366                         char *name, struct drsuapi_DsNameInfo1 *info1,
 367                         struct ldb_dn **psearch_dn, const char *domain_filter, const char **presult_filter)
 368 {
 369         struct ldb_result *domain_res = NULL;
 370         const char * const domain_attrs[] = {"ncName", NULL};
 371         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 372         int ldb_ret;
 373         char *account,  *s, *result_filter = NULL;
 374         struct ldb_dn *search_dn = NULL;
 375
 376         *psearch_dn = NULL;
 377         *presult_filter = NULL;
 378
 379         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 380                                 partitions_basedn,
 381                                 LDB_SCOPE_ONELEVEL,
 382                                 domain_attrs,
 383                                 "%s", domain_filter);
 384
 385         if (ldb_ret != LDB_SUCCESS) {
 386                 DEBUG(2, ("DsCrackNameOne domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
 387                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 388                 return WERR_FOOBAR;
 389         }
 390
 391         if (domain_res->count == 1) {
 392                 struct ldb_dn *tmp_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 393                 const char * const name_attrs[] = {"name", NULL};
 394
 395                 account = name;
 396                 s = strchr(account, '/');
 397                 while(s) {
 398                         s[0] = '\0';
 399                         s++;
 400                         talloc_free(domain_res);
 401
 402                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 403                                                 tmp_dn,
 404                                                 LDB_SCOPE_ONELEVEL,
 405                                                 name_attrs,
 406                                                 "name=%s", account);
 407
 408                         if (ldb_ret != LDB_SUCCESS) {
 409                                 DEBUG(2, ("DsCrackNameOne domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
 410                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 411                                 return WERR_OK;
 412                         }
 413                         switch (domain_res->count) {
 414                         case 1:
 415                                 break;
 416                         case 0:
 417                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 418                                 return WERR_OK;
 419                         default:
 420                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 421                                 return WERR_OK;
 422                         }
 423
 424                         talloc_free(tmp_dn);
 425                         tmp_dn = talloc_steal(mem_ctx, domain_res->msgs[0]->dn);
 426                         talloc_free(domain_res);
 427                         search_dn = tmp_dn;
 428                         account = s;
 429                         s = strchr(account, '/');
 430                 }
 431                 account = ldb_binary_encode_string(mem_ctx, account);
 432                 W_ERROR_HAVE_NO_MEMORY(account);
 433                 result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 434                                                 account);
 435                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 436         }
 437         *psearch_dn = search_dn;
 438         *presult_filter = result_filter;
 439         return WERR_OK;
 440 }
 441
 442 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 443
 444 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 445                           uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 446                           enum drsuapi_DsNameFormat format_desired,
 447                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 448 {
 449         krb5_error_code ret;
 450         const char *domain_filter = NULL;
 451         const char *result_filter = NULL;
 452         struct ldb_dn *name_dn = NULL;
 453         struct ldb_dn *search_dn = NULL;
 454
 455         struct smb_krb5_context *smb_krb5_context = NULL;
 456         int scope = LDB_SCOPE_SUBTREE;
 457
 458         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 459         info1->dns_domain_name = NULL;
 460         info1->result_name = NULL;
 461
 462         if (!name) {
 463                 return WERR_INVALID_PARAM;
 464         }
 465
 466         /* TODO: - fill the correct names in all cases!
 467          *       - handle format_flags
 468          */
 469
 470         /* here we need to set the domain_filter and/or the result_filter */
 471         switch (format_offered) {
 472         case DRSUAPI_DS_NAME_FORMAT_UNKNOWN:
 473         {
 474                 unsigned int i;
 475                 enum drsuapi_DsNameFormat formats[] = {
 476                         DRSUAPI_DS_NAME_FORMAT_FQDN_1779, DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 477                         DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT, DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 478                         DRSUAPI_DS_NAME_FORMAT_GUID, DRSUAPI_DS_NAME_FORMAT_DISPLAY,
 479                         DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 480                         DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY,
 481                         DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX
 482                 };
 483                 WERROR werr;
 484                 for (i=0; i < ARRAY_SIZE(formats); i++) {
 485                         werr = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, formats[i], format_desired, name, info1);
 486                         if (!W_ERROR_IS_OK(werr)) {
 487                                 return werr;
 488                         }
 489                         if (info1->status != DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 490                                 return werr;
 491                         }
 492                 }
 493                 return werr;
 494         }
 495
 496         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 497         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 498         {
 499                 char *str, *s, *account;
 500                 scope = LDB_SCOPE_ONELEVEL;
 501
 502                 if (strlen(name) == 0) {
 503                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 504                         return WERR_OK;
 505                 }
 506
 507                 str = talloc_strdup(mem_ctx, name);
 508                 W_ERROR_HAVE_NO_MEMORY(str);
 509
 510                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 511                         /* Look backwards for the \n, and replace it with / */
 512                         s = strrchr(str, '\n');
 513                         if (!s) {
 514                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 515                                 return WERR_OK;
 516                         }
 517                         s[0] = '/';
 518                 }
 519
 520                 s = strchr(str, '/');
 521                 if (!s) {
 522                         /* there must be at least one / */
 523                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 524                         return WERR_OK;
 525                 }
 526
 527                 s[0] = '\0';
 528                 s++;
 529
 530                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(dnsRoot=%s)(systemFlags:%s:=%u))",
 531                                                 ldb_binary_encode_string(mem_ctx, str),
 532                                                 LDB_OID_COMPARATOR_AND,
 533                                                 SYSTEM_FLAG_CR_NTDS_DOMAIN);
 534                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 535
 536                 /* There may not be anything after the domain component (search for the domain itself) */
 537                 account = s;
 538                 if (account && *account) {
 539                         WERROR werr = get_format_functional_filtering_param(sam_ctx,
 540                                                                                 mem_ctx,
 541                                                                                 account,
 542                                                                                 info1,
 543                                                                                 &search_dn,
 544                                                                                 domain_filter,
 545                                                                                 &result_filter);
 546                         if (!W_ERROR_IS_OK(werr)) {
 547                                 return werr;
 548                         }
 549                         if (info1->status != DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR)
 550                                 return WERR_OK;
 551                 }
 552                 break;
 553         }
 554         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 555                 char *p;
 556                 char *domain;
 557                 const char *account = NULL;
 558
 559                 domain = talloc_strdup(mem_ctx, name);
 560                 W_ERROR_HAVE_NO_MEMORY(domain);
 561
 562                 p = strchr(domain, '\\');
 563                 if (!p) {
 564                         /* invalid input format */
 565                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 566                         return WERR_OK;
 567                 }
 568                 p[0] = '\0';
 569
 570                 if (p[1]) {
 571                         account = &p[1];
 572                 }
 573
 574                 domain_filter = talloc_asprintf(mem_ctx,
 575                                                 "(&(objectClass=crossRef)(|(dnsRoot=%s)(netbiosName=%s))(systemFlags:%s:=%u))",
 576                                                 ldb_binary_encode_string(mem_ctx, domain),
 577                                                 ldb_binary_encode_string(mem_ctx, domain),
 578                                                 LDB_OID_COMPARATOR_AND,
 579                                                 SYSTEM_FLAG_CR_NTDS_DOMAIN);
 580                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 581                 if (account) {
 582                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 583                                                         ldb_binary_encode_string(mem_ctx, account));
 584                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 585                 }
 586
 587                 talloc_free(domain);
 588                 break;
 589         }
 590
 591                 /* A LDAP DN as a string */
 592         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 593                 domain_filter = NULL;
 594                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 595                 if (! ldb_dn_validate(name_dn)) {
 596                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 597                         return WERR_OK;
 598                 }
 599                 break;
 600         }
 601
 602                 /* A GUID as a string */
 603         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 604                 struct GUID guid;
 605                 char *ldap_guid;
 606                 NTSTATUS nt_status;
 607                 domain_filter = NULL;
 608
 609                 nt_status = GUID_from_string(name, &guid);
 610                 if (!NT_STATUS_IS_OK(nt_status)) {
 611                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 612                         return WERR_OK;
 613                 }
 614
 615                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 616                 if (!ldap_guid) {
 617                         return WERR_NOMEM;
 618                 }
 619                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 620                                                 ldap_guid);
 621                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 622                 break;
 623         }
 624         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 625                 domain_filter = NULL;
 626
 627                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 628                                                 ldb_binary_encode_string(mem_ctx, name),
 629                                                 ldb_binary_encode_string(mem_ctx, name));
 630                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 631                 break;
 632         }
 633
 634                 /* A S-1234-5678 style string */
 635         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 636                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 637                 char *ldap_sid;
 638
 639                 domain_filter = NULL;
 640                 if (!sid) {
 641                         info1->dns_domain_name = NULL;
 642                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 643                         return WERR_OK;
 644                 }
 645                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 646                                                    sid);
 647                 if (!ldap_sid) {
 648                         return WERR_NOMEM;
 649                 }
 650                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 651                                                 ldap_sid);
 652                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 653                 break;
 654         }
 655         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 656                 krb5_principal principal;
 657                 char *unparsed_name;
 658
 659                 ret = smb_krb5_init_context(mem_ctx,
 660                                             ldb_get_event_context(sam_ctx),
 661                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 662                                             &smb_krb5_context);
 663
 664                 if (ret) {
 665                         return WERR_NOMEM;
 666                 }
 667
 668                 /* Ensure we reject compleate junk first */
 669                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 670                 if (ret) {
 671                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 672                         return WERR_OK;
 673                 }
 674
 675                 domain_filter = NULL;
 676
 677                 /* By getting the unparsed name here, we ensure the escaping is correct (and trust the client less) */
 678                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 679                 if (ret) {
 680                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 681                         return WERR_NOMEM;
 682                 }
 683
 684                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 685
 686                 /* The ldb_binary_encode_string() here avoid LDAP filter injection attacks */
 687                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 688                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 689
 690                 free(unparsed_name);
 691                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 692                 break;
 693         }
 694         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 695                 krb5_principal principal;
 696                 char *unparsed_name_short;
 697                 const krb5_data *component;
 698                 char *service;
 699
 700                 ret = smb_krb5_init_context(mem_ctx,
 701                                             ldb_get_event_context(sam_ctx),
 702                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 703                                             &smb_krb5_context);
 704
 705                 if (ret) {
 706                         return WERR_NOMEM;
 707                 }
 708
 709                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 710                 if (ret == 0 &&
 711                     krb5_princ_size(smb_krb5_context->krb5_context,
 712                                                         principal) < 2) {
 713                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 714                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 715                         return WERR_OK;
 716                 } else if (ret == 0) {
 717                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 718                 }
 719                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 720                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 721                 if (ret) {
 722                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 723                                                          name, info1);
 724                 }
 725
 726                 domain_filter = NULL;
 727
 728                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 729                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 730                 if (ret) {
 731                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 732                         return WERR_NOMEM;
 733                 }
 734
 735                 component = krb5_princ_component(smb_krb5_context->krb5_context,
 736                                                  principal, 0);
 737                 service = (char *)component->data;
 738                 if ((krb5_princ_size(smb_krb5_context->krb5_context,
 739                                                         principal) == 2) &&
 740                         (strcasecmp(service, "host") == 0)) {
 741                         /* the 'cn' attribute is just the leading part of the name */
 742                         char *computer_name;
 743                         component = krb5_princ_component(
 744                                                 smb_krb5_context->krb5_context,
 745                                                 principal, 1);
 746                         computer_name = talloc_strndup(mem_ctx, (char *)component->data,
 747                                                         strcspn((char *)component->data, "."));
 748                         if (computer_name == NULL) {
 749                                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 750                                 free(unparsed_name_short);
 751                                 return WERR_NOMEM;
 752                         }
 753
 754                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 755                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 756                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 757                 } else {
 758                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 759                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 760                 }
 761                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 762                 free(unparsed_name_short);
 763                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 764
 765                 break;
 766         }
 767         default: {
 768                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 769                 return WERR_OK;
 770         }
 771         }
 772
 773         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 774                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 775                                                  name_dn, name, info1);
 776         }
 777
 778         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 779                                     smb_krb5_context,
 780                                     format_flags, format_offered, format_desired,
 781                                     name_dn, name,
 782                                     domain_filter, result_filter,
 783                                     info1, scope, search_dn);
 784 }
 785
 786 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 787  * (FQDN_1779) into a canoical name without actually searching the
 788  * database */
 789
 790 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 791                                         enum drsuapi_DsNameFormat format_offered,
 792                                         enum drsuapi_DsNameFormat format_desired,
 793                                         struct ldb_dn *name_dn, const char *name,
 794                                         struct drsuapi_DsNameInfo1 *info1)
 795 {
 796         char *cracked;
 797         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 798                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 799                 return WERR_OK;
 800         }
 801
 802         switch (format_desired) {
 803         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 804                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 805                 break;
 806         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 807                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 808                 break;
 809         default:
 810                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 811                 return WERR_OK;
 812         }
 813         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 814         info1->result_name      = cracked;
 815         if (!cracked) {
 816                 return WERR_NOMEM;
 817         }
 818
 819         return WERR_OK;
 820 }
 821
 822 /* Given a filter for the domain, and one for the result, perform the
 823  * ldb search. The format offered and desired flags change the
 824  * behaviours, including what attributes to return.
 825  *
 826  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 827  */
 828
 829 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 830                                    struct smb_krb5_context *smb_krb5_context,
 831                                    uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 832                                    enum drsuapi_DsNameFormat format_desired,
 833                                    struct ldb_dn *name_dn, const char *name,
 834                                    const char *domain_filter, const char *result_filter,
 835                                    struct drsuapi_DsNameInfo1 *info1,
 836                                    int scope, struct ldb_dn *search_dn)
 837 {
 838         int ldb_ret;
 839         struct ldb_result *domain_res = NULL;
 840         const char * const *domain_attrs;
 841         const char * const *result_attrs;
 842         struct ldb_message **result_res = NULL;
 843         struct ldb_message *result = NULL;
 844         int i;
 845         char *p;
 846         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 847
 848         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 849         const char * const _result_attrs_null[] = { NULL };
 850
 851         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 852         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 853
 854         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 855         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 856
 857         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 858         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 859
 860         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 861         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 862
 863         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
 864         const char * const _result_attrs_none[] = { NULL};
 865
 866         /* here we need to set the attrs lists for domain and result lookups */
 867         switch (format_desired) {
 868         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 869         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 870                 domain_attrs = _domain_attrs_1779;
 871                 result_attrs = _result_attrs_null;
 872                 break;
 873         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 874                 domain_attrs = _domain_attrs_canonical;
 875                 result_attrs = _result_attrs_canonical;
 876                 break;
 877         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 878                 domain_attrs = _domain_attrs_nt4;
 879                 result_attrs = _result_attrs_nt4;
 880                 break;
 881         case DRSUAPI_DS_NAME_FORMAT_GUID:
 882                 domain_attrs = _domain_attrs_guid;
 883                 result_attrs = _result_attrs_guid;
 884                 break;
 885         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 886                 domain_attrs = _domain_attrs_display;
 887                 result_attrs = _result_attrs_display;
 888                 break;
 889         default:
 890                 domain_attrs = _domain_attrs_none;
 891                 result_attrs = _result_attrs_none;
 892                 break;
 893         }
 894
 895         if (domain_filter) {
 896                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 897                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 898                                              partitions_basedn,
 899                                              LDB_SCOPE_ONELEVEL,
 900                                              domain_attrs,
 901                                              "%s", domain_filter);
 902
 903                 if (ldb_ret != LDB_SUCCESS) {
 904                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
 905                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 906                         return WERR_OK;
 907                 }
 908
 909                 switch (domain_res->count) {
 910                 case 1:
 911                         break;
 912                 case 0:
 913                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 914                         return WERR_OK;
 915                 default:
 916                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 917                         return WERR_OK;
 918                 }
 919
 920                 info1->dns_domain_name  = ldb_msg_find_attr_as_string(domain_res->msgs[0], "dnsRoot", NULL);
 921                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 922                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 923         } else {
 924                 info1->dns_domain_name  = NULL;
 925                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 926         }
 927
 928         if (result_filter) {
 929                 int ret;
 930                 struct ldb_result *res;
 931                 uint32_t dsdb_flags = 0;
 932                 struct ldb_dn *real_search_dn;
 933
 934                 if (domain_res) {
 935                         if (!search_dn) {
 936                                 struct ldb_dn *tmp_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 937                                 real_search_dn = tmp_dn;
 938                         } else {
 939                                 real_search_dn = search_dn;
 940                         }
 941                 } else {
 942                         dsdb_flags = DSDB_SEARCH_SEARCH_ALL_PARTITIONS;
 943                         real_search_dn = NULL;
 944                 }
 945                 if (format_desired == DRSUAPI_DS_NAME_FORMAT_GUID){
 946                          dsdb_flags = dsdb_flags| DSDB_SEARCH_SHOW_DELETED;
 947                 }
 948
 949                 /* search with the 'phantom root' flag */
 950                 ret = dsdb_search(sam_ctx, mem_ctx, &res,
 951                                   real_search_dn,
 952                                   scope,
 953                                   result_attrs,
 954                                   dsdb_flags,
 955                                   "%s", result_filter);
 956                 if (ret != LDB_SUCCESS) {
 957                         DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s\n",
 958                                   ldb_errstring(sam_ctx)));
 959                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 960                         return WERR_OK;
 961                 }
 962
 963                 ldb_ret = res->count;
 964                 result_res = res->msgs;
 965         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 966                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 967                                           result_attrs);
 968         } else if (domain_res) {
 969                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 970                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 971                                           result_attrs);
 972         } else {
 973                 /* Can't happen */
 974                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not available: This can't happen...\n"));
 975                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 976                 return WERR_OK;
 977         }
 978
 979         switch (ldb_ret) {
 980         case 1:
 981                 result = result_res[0];
 982                 break;
 983         case 0:
 984                 switch (format_offered) {
 985                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 986                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 987                                                    smb_krb5_context,
 988                                                    format_flags, format_offered, format_desired,
 989                                                    name, info1);
 990
 991                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 992                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 993                                               format_flags, format_offered, format_desired,
 994                                               name, info1);
 995                 default:
 996                         break;
 997                 }
 998                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 999                 return WERR_OK;
1000         case -1:
1001                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s\n", ldb_errstring(sam_ctx)));
1002                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1003                 return WERR_OK;
1004         default:
1005                 switch (format_offered) {
1006                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
1007                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
1008                 {
1009                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
1010                         /* We may need to manually filter further */
1011                         for (i = 0; i < ldb_ret; i++) {
1012                                 switch (format_offered) {
1013                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
1014                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
1015                                         break;
1016                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
1017                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
1018                                         break;
1019                                 default:
1020                                         break;
1021                                 }
1022                                 if (strcasecmp_m(canonical_name, name) == 0) {
1023                                         result = result_res[i];
1024                                         break;
1025                                 }
1026                         }
1027                         if (!result) {
1028                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1029                                 return WERR_OK;
1030                         }
1031                 }
1032                 default:
1033                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1034                         return WERR_OK;
1035                 }
1036         }
1037
1038         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
1039         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
1040         p = strchr(info1->dns_domain_name, '/');
1041         if (p) {
1042                 p[0] = '\0';
1043         }
1044
1045         /* here we can use result and domain_res[0] */
1046         switch (format_desired) {
1047         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
1048                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
1049                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1050
1051                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1052                 return WERR_OK;
1053         }
1054         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
1055                 info1->result_name      = ldb_msg_find_attr_as_string(result, "canonicalName", NULL);
1056                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1057                 return WERR_OK;
1058         }
1059         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
1060                 /* Not in the virtual ldb attribute */
1061                 return DsCrackNameOneSyntactical(mem_ctx,
1062                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1063                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
1064                                                  result->dn, name, info1);
1065         }
1066         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
1067
1068                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
1069                 const char *_acc = "", *_dom = "";
1070
1071                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
1072
1073                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1074                                                      partitions_basedn,
1075                                                      LDB_SCOPE_ONELEVEL,
1076                                                      domain_attrs,
1077                                                      "(ncName=%s)", ldb_dn_get_linearized(result->dn));
1078
1079                         if (ldb_ret != LDB_SUCCESS) {
1080                                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
1081                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1082                                 return WERR_OK;
1083                         }
1084
1085                         switch (domain_res->count) {
1086                         case 1:
1087                                 break;
1088                         case 0:
1089                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1090                                 return WERR_OK;
1091                         default:
1092                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1093                                 return WERR_OK;
1094                         }
1095                         _dom = ldb_msg_find_attr_as_string(domain_res->msgs[0], "nETBIOSName", NULL);
1096                         W_ERROR_HAVE_NO_MEMORY(_dom);
1097                 } else {
1098                         _acc = ldb_msg_find_attr_as_string(result, "sAMAccountName", NULL);
1099                         if (!_acc) {
1100                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1101                                 return WERR_OK;
1102                         }
1103                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
1104                                 _dom = "BUILTIN";
1105                         } else {
1106                                 const char *attrs[] = { NULL };
1107                                 struct ldb_result *domain_res2;
1108                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
1109                                 if (!dom_sid) {
1110                                         return WERR_OK;
1111                                 }
1112                                 dom_sid->num_auths--;
1113                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1114                                                              NULL,
1115                                                              LDB_SCOPE_BASE,
1116                                                              attrs,
1117                                                              "(&(objectSid=%s)(objectClass=domain))",
1118                                                              ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
1119
1120                                 if (ldb_ret != LDB_SUCCESS) {
1121                                         DEBUG(2, ("DsCrackNameOneFilter domain search failed: %s\n", ldb_errstring(sam_ctx)));
1122                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1123                                         return WERR_OK;
1124                                 }
1125
1126                                 switch (domain_res->count) {
1127                                 case 1:
1128                                         break;
1129                                 case 0:
1130                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1131                                         return WERR_OK;
1132                                 default:
1133                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1134                                         return WERR_OK;
1135                                 }
1136
1137                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res2,
1138                                                              partitions_basedn,
1139                                                              LDB_SCOPE_ONELEVEL,
1140                                                              domain_attrs,
1141                                                              "(ncName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
1142
1143                                 if (ldb_ret != LDB_SUCCESS) {
1144                                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
1145                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1146                                         return WERR_OK;
1147                                 }
1148
1149                                 switch (domain_res2->count) {
1150                                 case 1:
1151                                         break;
1152                                 case 0:
1153                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1154                                         return WERR_OK;
1155                                 default:
1156                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1157                                         return WERR_OK;
1158                                 }
1159                                 _dom = ldb_msg_find_attr_as_string(domain_res2->msgs[0], "nETBIOSName", NULL);
1160                                 W_ERROR_HAVE_NO_MEMORY(_dom);
1161                         }
1162                 }
1163
1164                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
1165                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1166
1167                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1168                 return WERR_OK;
1169         }
1170         case DRSUAPI_DS_NAME_FORMAT_GUID: {
1171                 struct GUID guid;
1172
1173                 guid = samdb_result_guid(result, "objectGUID");
1174
1175                 info1->result_name      = GUID_string2(mem_ctx, &guid);
1176                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1177
1178                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1179                 return WERR_OK;
1180         }
1181         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
1182                 info1->result_name      = ldb_msg_find_attr_as_string(result, "displayName", NULL);
1183                 if (!info1->result_name) {
1184                         info1->result_name      = ldb_msg_find_attr_as_string(result, "sAMAccountName", NULL);
1185                 }
1186                 if (!info1->result_name) {
1187                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1188                 } else {
1189                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
1190                 }
1191                 return WERR_OK;
1192         }
1193         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
1194                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1195                 return WERR_OK;
1196         }
1197         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
1198         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
1199                 info1->dns_domain_name = NULL;
1200                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1201                 return WERR_OK;
1202         }
1203         default:
1204                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1205                 return WERR_OK;
1206         }
1207 }
1208
1209 /* Given a user Principal Name (such as foo@bar.com),
1210  * return the user and domain DNs.  This is used in the KDC to then
1211  * return the Keys and evaluate policy */
1212
1213 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1214                                    TALLOC_CTX *mem_ctx,
1215                                    const char *user_principal_name,
1216                                    struct ldb_dn **user_dn,
1217                                    struct ldb_dn **domain_dn)
1218 {
1219         WERROR werr;
1220         struct drsuapi_DsNameInfo1 info1;
1221         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1222                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1223                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1224                                   user_principal_name,
1225                                   &info1);
1226         if (!W_ERROR_IS_OK(werr)) {
1227                 return werror_to_ntstatus(werr);
1228         }
1229         switch (info1.status) {
1230         case DRSUAPI_DS_NAME_STATUS_OK:
1231                 break;
1232         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1233         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1234         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1235                 return NT_STATUS_NO_SUCH_USER;
1236         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1237         default:
1238                 return NT_STATUS_UNSUCCESSFUL;
1239         }
1240
1241         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1242
1243         if (domain_dn) {
1244                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1245                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1246                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1247                                           talloc_asprintf(mem_ctx, "%s/",
1248                                                           info1.dns_domain_name),
1249                                           &info1);
1250                 if (!W_ERROR_IS_OK(werr)) {
1251                         return werror_to_ntstatus(werr);
1252                 }
1253                 switch (info1.status) {
1254                 case DRSUAPI_DS_NAME_STATUS_OK:
1255                         break;
1256                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1257                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1258                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1259                         return NT_STATUS_NO_SUCH_USER;
1260                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1261                 default:
1262                         return NT_STATUS_UNSUCCESSFUL;
1263                 }
1264
1265                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1266         }
1267
1268         return NT_STATUS_OK;
1269 }
1270
1271 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1272  * return the user and domain DNs.  This is used in the KDC to then
1273  * return the Keys and evaluate policy */
1274
1275 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1276                                       TALLOC_CTX *mem_ctx,
1277                                       const char *service_principal_name,
1278                                       struct ldb_dn **user_dn,
1279                                       struct ldb_dn **domain_dn)
1280 {
1281         WERROR werr;
1282         struct drsuapi_DsNameInfo1 info1;
1283         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1284                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1285                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1286                                   service_principal_name,
1287                                   &info1);
1288         if (!W_ERROR_IS_OK(werr)) {
1289                 return werror_to_ntstatus(werr);
1290         }
1291         switch (info1.status) {
1292         case DRSUAPI_DS_NAME_STATUS_OK:
1293                 break;
1294         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1295         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1296         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1297                 return NT_STATUS_NO_SUCH_USER;
1298         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1299         default:
1300                 return NT_STATUS_UNSUCCESSFUL;
1301         }
1302
1303         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1304
1305         if (domain_dn) {
1306                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1307                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1308                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1309                                           talloc_asprintf(mem_ctx, "%s/",
1310                                                           info1.dns_domain_name),
1311                                           &info1);
1312                 if (!W_ERROR_IS_OK(werr)) {
1313                         return werror_to_ntstatus(werr);
1314                 }
1315                 switch (info1.status) {
1316                 case DRSUAPI_DS_NAME_STATUS_OK:
1317                         break;
1318                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1319                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1320                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1321                         return NT_STATUS_NO_SUCH_USER;
1322                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1323                 default:
1324                         return NT_STATUS_UNSUCCESSFUL;
1325                 }
1326
1327                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1328         }
1329
1330         return NT_STATUS_OK;
1331 }
1332
1333 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1334                                 struct tevent_context *ev_ctx,
1335                                 struct loadparm_context *lp_ctx,
1336                                 enum drsuapi_DsNameFormat format_offered,
1337                                 const char *name,
1338                                 const char **nt4_domain, const char **nt4_account)
1339 {
1340         WERROR werr;
1341         struct drsuapi_DsNameInfo1 info1;
1342         struct ldb_context *ldb;
1343         char *p;
1344
1345         /* Handle anonymous bind */
1346         if (!name || !*name) {
1347                 *nt4_domain = "";
1348                 *nt4_account = "";
1349                 return NT_STATUS_OK;
1350         }
1351
1352         ldb = samdb_connect(mem_ctx, ev_ctx, lp_ctx, system_session(lp_ctx), 0);
1353         if (ldb == NULL) {
1354                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1355         }
1356
1357         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1358                                   format_offered,
1359                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1360                                   name,
1361                                   &info1);
1362         if (!W_ERROR_IS_OK(werr)) {
1363                 return werror_to_ntstatus(werr);
1364         }
1365         switch (info1.status) {
1366         case DRSUAPI_DS_NAME_STATUS_OK:
1367                 break;
1368         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1369         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1370         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1371                 return NT_STATUS_NO_SUCH_USER;
1372         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1373         default:
1374                 return NT_STATUS_UNSUCCESSFUL;
1375         }
1376
1377         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1378         if (*nt4_domain == NULL) {
1379                 return NT_STATUS_NO_MEMORY;
1380         }
1381
1382         p = strchr(*nt4_domain, '\\');
1383         if (!p) {
1384                 return NT_STATUS_INVALID_PARAMETER;
1385         }
1386         p[0] = '\0';
1387
1388         *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1389         if (*nt4_account == NULL) {
1390                 return NT_STATUS_NO_MEMORY;
1391         }
1392
1393         return NT_STATUS_OK;
1394 }
1395
1396 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1397                                      struct tevent_context *ev_ctx,
1398                                      struct loadparm_context *lp_ctx,
1399                                      const char *name,
1400                                      const char **nt4_domain,
1401                                      const char **nt4_account)
1402 {
1403         enum drsuapi_DsNameFormat format_offered = DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
1404
1405         /* Handle anonymous bind */
1406         if (!name || !*name) {
1407                 *nt4_domain = "";
1408                 *nt4_account = "";
1409                 return NT_STATUS_OK;
1410         }
1411
1412         if (strchr_m(name, '=')) {
1413                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1414         } else if (strchr_m(name, '@')) {
1415                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1416         } else if (strchr_m(name, '\\')) {
1417                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1418         } else if (strchr_m(name, '/')) {
1419                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1420         } else {
1421                 return NT_STATUS_NO_SUCH_USER;
1422         }
1423
1424         return crack_name_to_nt4_name(mem_ctx, ev_ctx, lp_ctx, format_offered, name, nt4_domain, nt4_account);
1425 }
1426
1427
1428 WERROR dcesrv_drsuapi_ListRoles(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1429                                 const struct drsuapi_DsNameRequest1 *req1,
1430                                 struct drsuapi_DsNameCtr1 **ctr1)
1431 {
1432         struct drsuapi_DsNameInfo1 *names;
1433         uint32_t i;
1434         uint32_t count = 5;/*number of fsmo role owners we are going to return*/
1435
1436         *ctr1 = talloc(mem_ctx, struct drsuapi_DsNameCtr1);
1437         W_ERROR_HAVE_NO_MEMORY(*ctr1);
1438         names = talloc_array(mem_ctx, struct drsuapi_DsNameInfo1, count);
1439         W_ERROR_HAVE_NO_MEMORY(names);
1440
1441         for (i = 0; i < count; i++) {
1442                 WERROR werr;
1443                 struct ldb_dn *role_owner_dn, *fsmo_role_dn, *server_dn;
1444                 werr = dsdb_get_fsmo_role_info(mem_ctx, sam_ctx, i,
1445                                                &fsmo_role_dn, &role_owner_dn);
1446                 if(!W_ERROR_IS_OK(werr)) {
1447                         return werr;
1448                 }
1449                 server_dn = ldb_dn_copy(mem_ctx, role_owner_dn);
1450                 ldb_dn_remove_child_components(server_dn, 1);
1451                 names[i].status = DRSUAPI_DS_NAME_STATUS_OK;
1452                 names[i].dns_domain_name = samdb_dn_to_dnshostname(sam_ctx, mem_ctx,
1453                                                                    server_dn);
1454                 if(!names[i].dns_domain_name) {
1455                         DEBUG(4, ("list_roles: Failed to find dNSHostName for server %s\n",
1456                                   ldb_dn_get_linearized(server_dn)));
1457                 }
1458                 names[i].result_name = talloc_strdup(mem_ctx, ldb_dn_get_linearized(role_owner_dn));
1459         }
1460
1461         (*ctr1)->count = count;
1462         (*ctr1)->array = names;
1463
1464         return WERR_OK;
1465 }
1466
1467 WERROR dcesrv_drsuapi_CrackNamesByNameFormat(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1468                                              const struct drsuapi_DsNameRequest1 *req1,
1469                                              struct drsuapi_DsNameCtr1 **ctr1)
1470 {
1471         struct drsuapi_DsNameInfo1 *names;
1472         uint32_t i, count;
1473         WERROR status;
1474
1475         *ctr1 = talloc_zero(mem_ctx, struct drsuapi_DsNameCtr1);
1476         W_ERROR_HAVE_NO_MEMORY(*ctr1);
1477
1478         count = req1->count;
1479         names = talloc_array(mem_ctx, struct drsuapi_DsNameInfo1, count);
1480         W_ERROR_HAVE_NO_MEMORY(names);
1481
1482         for (i=0; i < count; i++) {
1483                 status = DsCrackNameOneName(sam_ctx, mem_ctx,
1484                                             req1->format_flags,
1485                                             req1->format_offered,
1486                                             req1->format_desired,
1487                                             req1->names[i].str,
1488                                             &names[i]);
1489                 if (!W_ERROR_IS_OK(status)) {
1490                         return status;
1491                 }
1492         }
1493
1494         (*ctr1)->count = count;
1495         (*ctr1)->array = names;
1496
1497         return WERR_OK;
1498 }
1499
1500 WERROR dcesrv_drsuapi_ListInfoServer(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1501                                      const struct drsuapi_DsNameRequest1 *req1,
1502                                      struct drsuapi_DsNameCtr1 **_ctr1)
1503 {
1504         struct drsuapi_DsNameInfo1 *names;
1505         struct ldb_result *res;
1506         struct ldb_dn *server_dn, *dn;
1507         struct drsuapi_DsNameCtr1 *ctr1;
1508         int ret, i;
1509         const char *str;
1510         const char *attrs[] = {
1511                 "dn",
1512                 "dNSHostName",
1513                 "serverReference",
1514                 NULL
1515         };
1516
1517         *_ctr1 = NULL;
1518
1519         ctr1 = talloc_zero(mem_ctx, struct drsuapi_DsNameCtr1);
1520         W_ERROR_HAVE_NO_MEMORY(ctr1);
1521
1522         /*
1523          * No magic value here, we have to return 3 entries according to the
1524          * MS-DRSR.pdf
1525          */
1526         ctr1->count = 3;
1527         names = talloc_zero_array(ctr1, struct drsuapi_DsNameInfo1,
1528                                   ctr1->count);
1529         W_ERROR_HAVE_NO_MEMORY(names);
1530         ctr1->array = names;
1531
1532         for (i=0; i < ctr1->count; i++) {
1533                 names[i].status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1534         }
1535         *_ctr1 = ctr1;
1536
1537         if (req1->count != 1) {
1538                 DEBUG(1, ("Expected a count of 1 for the ListInfoServer crackname \n"));
1539                 return WERR_OK;
1540         }
1541
1542         if (req1->names[0].str == NULL) {
1543                 return WERR_OK;
1544         }
1545
1546         server_dn = ldb_dn_new(mem_ctx, sam_ctx, req1->names[0].str);
1547         W_ERROR_HAVE_NO_MEMORY(server_dn);
1548
1549         ret = ldb_search(sam_ctx, mem_ctx, &res, server_dn, LDB_SCOPE_ONELEVEL,
1550                          NULL, "(objectClass=nTDSDSA)");
1551
1552         if (ret != LDB_SUCCESS) {
1553                 DEBUG(1, ("Search for objectClass=nTDSDSA "
1554                           "returned less than 1 objects\n"));
1555                 return WERR_OK;
1556         }
1557
1558         if (res->count != 1) {
1559                 DEBUG(1, ("Search for objectClass=nTDSDSA "
1560                           "returned less than 1 objects\n"));
1561                 return WERR_OK;
1562         }
1563
1564         if (res->msgs[0]->dn) {
1565                 names[0].result_name = ldb_dn_alloc_linearized(names, res->msgs[0]->dn);
1566                 W_ERROR_HAVE_NO_MEMORY(names[0].result_name);
1567                 names[0].status = DRSUAPI_DS_NAME_STATUS_OK;
1568         }
1569
1570         talloc_free(res);
1571
1572         ret = ldb_search(sam_ctx, mem_ctx, &res, server_dn, LDB_SCOPE_BASE,
1573                          attrs, "(objectClass=*)");
1574         if (ret != LDB_SUCCESS) {
1575                 DEBUG(1, ("Search for objectClass=* on dn %s"
1576                           "returned %s\n", req1->names[0].str,
1577                           ldb_strerror(ret)));
1578                 return WERR_OK;
1579         }
1580
1581         if (res->count != 1) {
1582                 DEBUG(1, ("Search for objectClass=* on dn %s"
1583                           "returned less than 1 objects\n", req1->names[0].str));
1584                 return WERR_OK;
1585         }
1586
1587         str = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
1588         if (str != NULL) {
1589                 names[1].result_name = talloc_strdup(names, str);
1590                 W_ERROR_HAVE_NO_MEMORY(names[1].result_name);
1591                 names[1].status = DRSUAPI_DS_NAME_STATUS_OK;
1592         }
1593
1594         dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, res->msgs[0], "serverReference");
1595         if (dn != NULL) {
1596                 names[2].result_name = ldb_dn_alloc_linearized(names, dn);
1597                 W_ERROR_HAVE_NO_MEMORY(names[2].result_name);
1598                 names[2].status = DRSUAPI_DS_NAME_STATUS_OK;
1599         }
1600
1601         talloc_free(dn);
1602         talloc_free(res);
1603
1604         return WERR_OK;
1605 }