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                 talloc_free(domain_res);
 398                 while(s) {
 399                         s[0] = '\0';
 400                         s++;
 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                         talloc_free(tmp_dn);
 414                         switch (domain_res->count) {
 415                         case 1:
 416                                 break;
 417                         case 0:
 418                                 talloc_free(domain_res);
 419                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 420                                 return WERR_OK;
 421                         default:
 422                                 talloc_free(domain_res);
 423                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 424                                 return WERR_OK;
 425                         }
 426
 427                         tmp_dn = talloc_steal(mem_ctx, domain_res->msgs[0]->dn);
 428                         talloc_free(domain_res);
 429                         search_dn = tmp_dn;
 430                         account = s;
 431                         s = strchr(account, '/');
 432                 }
 433                 account = ldb_binary_encode_string(mem_ctx, account);
 434                 W_ERROR_HAVE_NO_MEMORY(account);
 435                 result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 436                                                 account);
 437                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 438         }
 439         *psearch_dn = search_dn;
 440         *presult_filter = result_filter;
 441         return WERR_OK;
 442 }
 443
 444 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 445
 446 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 447                           uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 448                           enum drsuapi_DsNameFormat format_desired,
 449                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 450 {
 451         krb5_error_code ret;
 452         const char *domain_filter = NULL;
 453         const char *result_filter = NULL;
 454         struct ldb_dn *name_dn = NULL;
 455         struct ldb_dn *search_dn = NULL;
 456
 457         struct smb_krb5_context *smb_krb5_context = NULL;
 458         int scope = LDB_SCOPE_SUBTREE;
 459
 460         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 461         info1->dns_domain_name = NULL;
 462         info1->result_name = NULL;
 463
 464         if (!name) {
 465                 return WERR_INVALID_PARAM;
 466         }
 467
 468         /* TODO: - fill the correct names in all cases!
 469          *       - handle format_flags
 470          */
 471
 472         /* here we need to set the domain_filter and/or the result_filter */
 473         switch (format_offered) {
 474         case DRSUAPI_DS_NAME_FORMAT_UNKNOWN:
 475         {
 476                 unsigned int i;
 477                 enum drsuapi_DsNameFormat formats[] = {
 478                         DRSUAPI_DS_NAME_FORMAT_FQDN_1779, DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 479                         DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT, DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 480                         DRSUAPI_DS_NAME_FORMAT_GUID, DRSUAPI_DS_NAME_FORMAT_DISPLAY,
 481                         DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 482                         DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY,
 483                         DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX
 484                 };
 485                 WERROR werr;
 486                 for (i=0; i < ARRAY_SIZE(formats); i++) {
 487                         werr = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, formats[i], format_desired, name, info1);
 488                         if (!W_ERROR_IS_OK(werr)) {
 489                                 return werr;
 490                         }
 491                         if (info1->status != DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 492                                 return werr;
 493                         }
 494                 }
 495                 return werr;
 496         }
 497
 498         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 499         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 500         {
 501                 char *str, *s, *account;
 502                 scope = LDB_SCOPE_ONELEVEL;
 503
 504                 if (strlen(name) == 0) {
 505                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 506                         return WERR_OK;
 507                 }
 508
 509                 str = talloc_strdup(mem_ctx, name);
 510                 W_ERROR_HAVE_NO_MEMORY(str);
 511
 512                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 513                         /* Look backwards for the \n, and replace it with / */
 514                         s = strrchr(str, '\n');
 515                         if (!s) {
 516                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 517                                 return WERR_OK;
 518                         }
 519                         s[0] = '/';
 520                 }
 521
 522                 s = strchr(str, '/');
 523                 if (!s) {
 524                         /* there must be at least one / */
 525                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 526                         return WERR_OK;
 527                 }
 528
 529                 s[0] = '\0';
 530                 s++;
 531
 532                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(dnsRoot=%s)(systemFlags:%s:=%u))",
 533                                                 ldb_binary_encode_string(mem_ctx, str),
 534                                                 LDB_OID_COMPARATOR_AND,
 535                                                 SYSTEM_FLAG_CR_NTDS_DOMAIN);
 536                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 537
 538                 /* There may not be anything after the domain component (search for the domain itself) */
 539                 account = s;
 540                 if (account && *account) {
 541                         WERROR werr = get_format_functional_filtering_param(sam_ctx,
 542                                                                                 mem_ctx,
 543                                                                                 account,
 544                                                                                 info1,
 545                                                                                 &search_dn,
 546                                                                                 domain_filter,
 547                                                                                 &result_filter);
 548                         if (!W_ERROR_IS_OK(werr)) {
 549                                 return werr;
 550                         }
 551                         if (info1->status != DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR)
 552                                 return WERR_OK;
 553                 }
 554                 break;
 555         }
 556         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 557                 char *p;
 558                 char *domain;
 559                 const char *account = NULL;
 560
 561                 domain = talloc_strdup(mem_ctx, name);
 562                 W_ERROR_HAVE_NO_MEMORY(domain);
 563
 564                 p = strchr(domain, '\\');
 565                 if (!p) {
 566                         /* invalid input format */
 567                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 568                         return WERR_OK;
 569                 }
 570                 p[0] = '\0';
 571
 572                 if (p[1]) {
 573                         account = &p[1];
 574                 }
 575
 576                 domain_filter = talloc_asprintf(mem_ctx,
 577                                                 "(&(objectClass=crossRef)(|(dnsRoot=%s)(netbiosName=%s))(systemFlags:%s:=%u))",
 578                                                 ldb_binary_encode_string(mem_ctx, domain),
 579                                                 ldb_binary_encode_string(mem_ctx, domain),
 580                                                 LDB_OID_COMPARATOR_AND,
 581                                                 SYSTEM_FLAG_CR_NTDS_DOMAIN);
 582                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 583                 if (account) {
 584                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 585                                                         ldb_binary_encode_string(mem_ctx, account));
 586                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 587                 }
 588
 589                 talloc_free(domain);
 590                 break;
 591         }
 592
 593                 /* A LDAP DN as a string */
 594         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 595                 domain_filter = NULL;
 596                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 597                 if (! ldb_dn_validate(name_dn)) {
 598                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 599                         return WERR_OK;
 600                 }
 601                 break;
 602         }
 603
 604                 /* A GUID as a string */
 605         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 606                 struct GUID guid;
 607                 char *ldap_guid;
 608                 NTSTATUS nt_status;
 609                 domain_filter = NULL;
 610
 611                 nt_status = GUID_from_string(name, &guid);
 612                 if (!NT_STATUS_IS_OK(nt_status)) {
 613                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 614                         return WERR_OK;
 615                 }
 616
 617                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 618                 if (!ldap_guid) {
 619                         return WERR_NOMEM;
 620                 }
 621                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 622                                                 ldap_guid);
 623                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 624                 break;
 625         }
 626         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 627                 domain_filter = NULL;
 628
 629                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 630                                                 ldb_binary_encode_string(mem_ctx, name),
 631                                                 ldb_binary_encode_string(mem_ctx, name));
 632                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 633                 break;
 634         }
 635
 636                 /* A S-1234-5678 style string */
 637         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 638                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 639                 char *ldap_sid;
 640
 641                 domain_filter = NULL;
 642                 if (!sid) {
 643                         info1->dns_domain_name = NULL;
 644                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 645                         return WERR_OK;
 646                 }
 647                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 648                                                    sid);
 649                 if (!ldap_sid) {
 650                         return WERR_NOMEM;
 651                 }
 652                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 653                                                 ldap_sid);
 654                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 655                 break;
 656         }
 657         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 658                 krb5_principal principal;
 659                 char *unparsed_name;
 660
 661                 ret = smb_krb5_init_context(mem_ctx,
 662                                             ldb_get_event_context(sam_ctx),
 663                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 664                                             &smb_krb5_context);
 665
 666                 if (ret) {
 667                         return WERR_NOMEM;
 668                 }
 669
 670                 /* Ensure we reject compleate junk first */
 671                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 672                 if (ret) {
 673                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 674                         return WERR_OK;
 675                 }
 676
 677                 domain_filter = NULL;
 678
 679                 /* By getting the unparsed name here, we ensure the escaping is correct (and trust the client less) */
 680                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 681                 if (ret) {
 682                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 683                         return WERR_NOMEM;
 684                 }
 685
 686                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 687
 688                 /* The ldb_binary_encode_string() here avoid LDAP filter injection attacks */
 689                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 690                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 691
 692                 free(unparsed_name);
 693                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 694                 break;
 695         }
 696         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 697                 krb5_principal principal;
 698                 char *unparsed_name_short;
 699                 const krb5_data *component;
 700                 char *service;
 701
 702                 ret = smb_krb5_init_context(mem_ctx,
 703                                             ldb_get_event_context(sam_ctx),
 704                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 705                                             &smb_krb5_context);
 706
 707                 if (ret) {
 708                         return WERR_NOMEM;
 709                 }
 710
 711                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 712                 if (ret == 0 &&
 713                     krb5_princ_size(smb_krb5_context->krb5_context,
 714                                                         principal) < 2) {
 715                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 716                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 717                         return WERR_OK;
 718                 } else if (ret == 0) {
 719                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 720                 }
 721                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 722                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 723                 if (ret) {
 724                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 725                                                          name, info1);
 726                 }
 727
 728                 domain_filter = NULL;
 729
 730                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 731                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 732                 if (ret) {
 733                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 734                         return WERR_NOMEM;
 735                 }
 736
 737                 component = krb5_princ_component(smb_krb5_context->krb5_context,
 738                                                  principal, 0);
 739                 service = (char *)component->data;
 740                 if ((krb5_princ_size(smb_krb5_context->krb5_context,
 741                                                         principal) == 2) &&
 742                         (strcasecmp(service, "host") == 0)) {
 743                         /* the 'cn' attribute is just the leading part of the name */
 744                         char *computer_name;
 745                         component = krb5_princ_component(
 746                                                 smb_krb5_context->krb5_context,
 747                                                 principal, 1);
 748                         computer_name = talloc_strndup(mem_ctx, (char *)component->data,
 749                                                         strcspn((char *)component->data, "."));
 750                         if (computer_name == NULL) {
 751                                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 752                                 free(unparsed_name_short);
 753                                 return WERR_NOMEM;
 754                         }
 755
 756                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 757                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 758                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 759                 } else {
 760                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 761                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 762                 }
 763                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 764                 free(unparsed_name_short);
 765                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 766
 767                 break;
 768         }
 769         default: {
 770                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 771                 return WERR_OK;
 772         }
 773         }
 774
 775         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 776                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 777                                                  name_dn, name, info1);
 778         }
 779
 780         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 781                                     smb_krb5_context,
 782                                     format_flags, format_offered, format_desired,
 783                                     name_dn, name,
 784                                     domain_filter, result_filter,
 785                                     info1, scope, search_dn);
 786 }
 787
 788 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 789  * (FQDN_1779) into a canoical name without actually searching the
 790  * database */
 791
 792 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 793                                         enum drsuapi_DsNameFormat format_offered,
 794                                         enum drsuapi_DsNameFormat format_desired,
 795                                         struct ldb_dn *name_dn, const char *name,
 796                                         struct drsuapi_DsNameInfo1 *info1)
 797 {
 798         char *cracked;
 799         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 800                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 801                 return WERR_OK;
 802         }
 803
 804         switch (format_desired) {
 805         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 806                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 807                 break;
 808         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 809                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 810                 break;
 811         default:
 812                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 813                 return WERR_OK;
 814         }
 815         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 816         info1->result_name      = cracked;
 817         if (!cracked) {
 818                 return WERR_NOMEM;
 819         }
 820
 821         return WERR_OK;
 822 }
 823
 824 /* Given a filter for the domain, and one for the result, perform the
 825  * ldb search. The format offered and desired flags change the
 826  * behaviours, including what attributes to return.
 827  *
 828  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 829  */
 830
 831 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 832                                    struct smb_krb5_context *smb_krb5_context,
 833                                    uint32_t format_flags, enum drsuapi_DsNameFormat format_offered,
 834                                    enum drsuapi_DsNameFormat format_desired,
 835                                    struct ldb_dn *name_dn, const char *name,
 836                                    const char *domain_filter, const char *result_filter,
 837                                    struct drsuapi_DsNameInfo1 *info1,
 838                                    int scope, struct ldb_dn *search_dn)
 839 {
 840         int ldb_ret;
 841         struct ldb_result *domain_res = NULL;
 842         const char * const *domain_attrs;
 843         const char * const *result_attrs;
 844         struct ldb_message **result_res = NULL;
 845         struct ldb_message *result = NULL;
 846         int i;
 847         char *p;
 848         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 849
 850         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 851         const char * const _result_attrs_null[] = { NULL };
 852
 853         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 854         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 855
 856         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 857         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 858
 859         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 860         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 861
 862         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 863         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 864
 865         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
 866         const char * const _result_attrs_none[] = { NULL};
 867
 868         /* here we need to set the attrs lists for domain and result lookups */
 869         switch (format_desired) {
 870         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 871         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 872                 domain_attrs = _domain_attrs_1779;
 873                 result_attrs = _result_attrs_null;
 874                 break;
 875         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 876                 domain_attrs = _domain_attrs_canonical;
 877                 result_attrs = _result_attrs_canonical;
 878                 break;
 879         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 880                 domain_attrs = _domain_attrs_nt4;
 881                 result_attrs = _result_attrs_nt4;
 882                 break;
 883         case DRSUAPI_DS_NAME_FORMAT_GUID:
 884                 domain_attrs = _domain_attrs_guid;
 885                 result_attrs = _result_attrs_guid;
 886                 break;
 887         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 888                 domain_attrs = _domain_attrs_display;
 889                 result_attrs = _result_attrs_display;
 890                 break;
 891         default:
 892                 domain_attrs = _domain_attrs_none;
 893                 result_attrs = _result_attrs_none;
 894                 break;
 895         }
 896
 897         if (domain_filter) {
 898                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 899                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 900                                              partitions_basedn,
 901                                              LDB_SCOPE_ONELEVEL,
 902                                              domain_attrs,
 903                                              "%s", domain_filter);
 904
 905                 if (ldb_ret != LDB_SUCCESS) {
 906                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
 907                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 908                         return WERR_OK;
 909                 }
 910
 911                 switch (domain_res->count) {
 912                 case 1:
 913                         break;
 914                 case 0:
 915                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 916                         return WERR_OK;
 917                 default:
 918                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 919                         return WERR_OK;
 920                 }
 921
 922                 info1->dns_domain_name  = ldb_msg_find_attr_as_string(domain_res->msgs[0], "dnsRoot", NULL);
 923                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 924                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 925         } else {
 926                 info1->dns_domain_name  = NULL;
 927                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 928         }
 929
 930         if (result_filter) {
 931                 int ret;
 932                 struct ldb_result *res;
 933                 uint32_t dsdb_flags = 0;
 934                 struct ldb_dn *real_search_dn;
 935
 936                 if (domain_res) {
 937                         if (!search_dn) {
 938                                 struct ldb_dn *tmp_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 939                                 real_search_dn = tmp_dn;
 940                         } else {
 941                                 real_search_dn = search_dn;
 942                         }
 943                 } else {
 944                         dsdb_flags = DSDB_SEARCH_SEARCH_ALL_PARTITIONS;
 945                         real_search_dn = NULL;
 946                 }
 947                 if (format_desired == DRSUAPI_DS_NAME_FORMAT_GUID){
 948                          dsdb_flags = dsdb_flags| DSDB_SEARCH_SHOW_DELETED;
 949                 }
 950
 951                 /* search with the 'phantom root' flag */
 952                 ret = dsdb_search(sam_ctx, mem_ctx, &res,
 953                                   real_search_dn,
 954                                   scope,
 955                                   result_attrs,
 956                                   dsdb_flags,
 957                                   "%s", result_filter);
 958                 if (ret != LDB_SUCCESS) {
 959                         DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s\n",
 960                                   ldb_errstring(sam_ctx)));
 961                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 962                         return WERR_OK;
 963                 }
 964
 965                 ldb_ret = res->count;
 966                 result_res = res->msgs;
 967         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 968                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 969                                           result_attrs);
 970         } else if (domain_res) {
 971                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 972                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 973                                           result_attrs);
 974         } else {
 975                 /* Can't happen */
 976                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not available: This can't happen...\n"));
 977                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 978                 return WERR_OK;
 979         }
 980
 981         switch (ldb_ret) {
 982         case 1:
 983                 result = result_res[0];
 984                 break;
 985         case 0:
 986                 switch (format_offered) {
 987                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 988                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 989                                                    smb_krb5_context,
 990                                                    format_flags, format_offered, format_desired,
 991                                                    name, info1);
 992
 993                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 994                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 995                                               format_flags, format_offered, format_desired,
 996                                               name, info1);
 997                 default:
 998                         break;
 999                 }
1000                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1001                 return WERR_OK;
1002         case -1:
1003                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s\n", ldb_errstring(sam_ctx)));
1004                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1005                 return WERR_OK;
1006         default:
1007                 switch (format_offered) {
1008                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
1009                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
1010                 {
1011                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
1012                         /* We may need to manually filter further */
1013                         for (i = 0; i < ldb_ret; i++) {
1014                                 switch (format_offered) {
1015                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
1016                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
1017                                         break;
1018                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
1019                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
1020                                         break;
1021                                 default:
1022                                         break;
1023                                 }
1024                                 if (strcasecmp_m(canonical_name, name) == 0) {
1025                                         result = result_res[i];
1026                                         break;
1027                                 }
1028                         }
1029                         if (!result) {
1030                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1031                                 return WERR_OK;
1032                         }
1033                 }
1034                 /* FALL TROUGH */
1035                 default:
1036                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1037                         return WERR_OK;
1038                 }
1039         }
1040
1041         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
1042         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
1043         p = strchr(info1->dns_domain_name, '/');
1044         if (p) {
1045                 p[0] = '\0';
1046         }
1047
1048         /* here we can use result and domain_res[0] */
1049         switch (format_desired) {
1050         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
1051                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
1052                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1053
1054                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1055                 return WERR_OK;
1056         }
1057         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
1058                 info1->result_name      = ldb_msg_find_attr_as_string(result, "canonicalName", NULL);
1059                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1060                 return WERR_OK;
1061         }
1062         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
1063                 /* Not in the virtual ldb attribute */
1064                 return DsCrackNameOneSyntactical(mem_ctx,
1065                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1066                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
1067                                                  result->dn, name, info1);
1068         }
1069         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
1070
1071                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
1072                 const char *_acc = "", *_dom = "";
1073                 if (sid == NULL) {
1074                         info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1075                         return WERR_OK;
1076                 }
1077
1078                 if (samdb_find_attribute(sam_ctx, result, "objectClass",
1079                                          "domain")) {
1080                         /* This can also find a DomainDNSZones entry,
1081                          * but it won't have the SID we just
1082                          * checked.  */
1083                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1084                                                      partitions_basedn,
1085                                                      LDB_SCOPE_ONELEVEL,
1086                                                      domain_attrs,
1087                                                      "(ncName=%s)", ldb_dn_get_linearized(result->dn));
1088
1089                         if (ldb_ret != LDB_SUCCESS) {
1090                                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
1091                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1092                                 return WERR_OK;
1093                         }
1094
1095                         switch (domain_res->count) {
1096                         case 1:
1097                                 break;
1098                         case 0:
1099                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1100                                 return WERR_OK;
1101                         default:
1102                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1103                                 return WERR_OK;
1104                         }
1105                         _dom = ldb_msg_find_attr_as_string(domain_res->msgs[0], "nETBIOSName", NULL);
1106                         W_ERROR_HAVE_NO_MEMORY(_dom);
1107                 } else {
1108                         _acc = ldb_msg_find_attr_as_string(result, "sAMAccountName", NULL);
1109                         if (!_acc) {
1110                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1111                                 return WERR_OK;
1112                         }
1113                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
1114                                 _dom = "BUILTIN";
1115                         } else {
1116                                 const char *attrs[] = { NULL };
1117                                 struct ldb_result *domain_res2;
1118                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
1119                                 if (!dom_sid) {
1120                                         return WERR_OK;
1121                                 }
1122                                 dom_sid->num_auths--;
1123                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1124                                                              NULL,
1125                                                              LDB_SCOPE_BASE,
1126                                                              attrs,
1127                                                              "(&(objectSid=%s)(objectClass=domain))",
1128                                                              ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
1129
1130                                 if (ldb_ret != LDB_SUCCESS) {
1131                                         DEBUG(2, ("DsCrackNameOneFilter domain search failed: %s\n", ldb_errstring(sam_ctx)));
1132                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1133                                         return WERR_OK;
1134                                 }
1135
1136                                 switch (domain_res->count) {
1137                                 case 1:
1138                                         break;
1139                                 case 0:
1140                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1141                                         return WERR_OK;
1142                                 default:
1143                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1144                                         return WERR_OK;
1145                                 }
1146
1147                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res2,
1148                                                              partitions_basedn,
1149                                                              LDB_SCOPE_ONELEVEL,
1150                                                              domain_attrs,
1151                                                              "(ncName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
1152
1153                                 if (ldb_ret != LDB_SUCCESS) {
1154                                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s\n", ldb_errstring(sam_ctx)));
1155                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1156                                         return WERR_OK;
1157                                 }
1158
1159                                 switch (domain_res2->count) {
1160                                 case 1:
1161                                         break;
1162                                 case 0:
1163                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1164                                         return WERR_OK;
1165                                 default:
1166                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1167                                         return WERR_OK;
1168                                 }
1169                                 _dom = ldb_msg_find_attr_as_string(domain_res2->msgs[0], "nETBIOSName", NULL);
1170                                 W_ERROR_HAVE_NO_MEMORY(_dom);
1171                         }
1172                 }
1173
1174                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
1175                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1176
1177                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1178                 return WERR_OK;
1179         }
1180         case DRSUAPI_DS_NAME_FORMAT_GUID: {
1181                 struct GUID guid;
1182
1183                 guid = samdb_result_guid(result, "objectGUID");
1184
1185                 info1->result_name      = GUID_string2(mem_ctx, &guid);
1186                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1187
1188                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1189                 return WERR_OK;
1190         }
1191         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
1192                 info1->result_name      = ldb_msg_find_attr_as_string(result, "displayName", NULL);
1193                 if (!info1->result_name) {
1194                         info1->result_name      = ldb_msg_find_attr_as_string(result, "sAMAccountName", NULL);
1195                 }
1196                 if (!info1->result_name) {
1197                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1198                 } else {
1199                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
1200                 }
1201                 return WERR_OK;
1202         }
1203         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
1204                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1205                 return WERR_OK;
1206         }
1207         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
1208         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
1209                 info1->dns_domain_name = NULL;
1210                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1211                 return WERR_OK;
1212         }
1213         default:
1214                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1215                 return WERR_OK;
1216         }
1217 }
1218
1219 /* Given a user Principal Name (such as foo@bar.com),
1220  * return the user and domain DNs.  This is used in the KDC to then
1221  * return the Keys and evaluate policy */
1222
1223 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1224                                    TALLOC_CTX *mem_ctx,
1225                                    const char *user_principal_name,
1226                                    struct ldb_dn **user_dn,
1227                                    struct ldb_dn **domain_dn)
1228 {
1229         WERROR werr;
1230         struct drsuapi_DsNameInfo1 info1;
1231         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1232                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1233                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1234                                   user_principal_name,
1235                                   &info1);
1236         if (!W_ERROR_IS_OK(werr)) {
1237                 return werror_to_ntstatus(werr);
1238         }
1239         switch (info1.status) {
1240         case DRSUAPI_DS_NAME_STATUS_OK:
1241                 break;
1242         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1243         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1244         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1245                 return NT_STATUS_NO_SUCH_USER;
1246         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1247         default:
1248                 return NT_STATUS_UNSUCCESSFUL;
1249         }
1250
1251         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1252
1253         if (domain_dn) {
1254                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1255                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1256                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1257                                           talloc_asprintf(mem_ctx, "%s/",
1258                                                           info1.dns_domain_name),
1259                                           &info1);
1260                 if (!W_ERROR_IS_OK(werr)) {
1261                         return werror_to_ntstatus(werr);
1262                 }
1263                 switch (info1.status) {
1264                 case DRSUAPI_DS_NAME_STATUS_OK:
1265                         break;
1266                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1267                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1268                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1269                         return NT_STATUS_NO_SUCH_USER;
1270                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1271                 default:
1272                         return NT_STATUS_UNSUCCESSFUL;
1273                 }
1274
1275                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1276         }
1277
1278         return NT_STATUS_OK;
1279 }
1280
1281 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1282  * return the user and domain DNs.  This is used in the KDC to then
1283  * return the Keys and evaluate policy */
1284
1285 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1286                                       TALLOC_CTX *mem_ctx,
1287                                       const char *service_principal_name,
1288                                       struct ldb_dn **user_dn,
1289                                       struct ldb_dn **domain_dn)
1290 {
1291         WERROR werr;
1292         struct drsuapi_DsNameInfo1 info1;
1293         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1294                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1295                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1296                                   service_principal_name,
1297                                   &info1);
1298         if (!W_ERROR_IS_OK(werr)) {
1299                 return werror_to_ntstatus(werr);
1300         }
1301         switch (info1.status) {
1302         case DRSUAPI_DS_NAME_STATUS_OK:
1303                 break;
1304         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1305         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1306         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1307                 return NT_STATUS_NO_SUCH_USER;
1308         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1309         default:
1310                 return NT_STATUS_UNSUCCESSFUL;
1311         }
1312
1313         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1314
1315         if (domain_dn) {
1316                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1317                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1318                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1319                                           talloc_asprintf(mem_ctx, "%s/",
1320                                                           info1.dns_domain_name),
1321                                           &info1);
1322                 if (!W_ERROR_IS_OK(werr)) {
1323                         return werror_to_ntstatus(werr);
1324                 }
1325                 switch (info1.status) {
1326                 case DRSUAPI_DS_NAME_STATUS_OK:
1327                         break;
1328                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1329                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1330                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1331                         return NT_STATUS_NO_SUCH_USER;
1332                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1333                 default:
1334                         return NT_STATUS_UNSUCCESSFUL;
1335                 }
1336
1337                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1338         }
1339
1340         return NT_STATUS_OK;
1341 }
1342
1343 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1344                                 struct tevent_context *ev_ctx,
1345                                 struct loadparm_context *lp_ctx,
1346                                 enum drsuapi_DsNameFormat format_offered,
1347                                 const char *name,
1348                                 const char **nt4_domain, const char **nt4_account)
1349 {
1350         WERROR werr;
1351         struct drsuapi_DsNameInfo1 info1;
1352         struct ldb_context *ldb;
1353         char *p;
1354
1355         /* Handle anonymous bind */
1356         if (!name || !*name) {
1357                 *nt4_domain = "";
1358                 *nt4_account = "";
1359                 return NT_STATUS_OK;
1360         }
1361
1362         ldb = samdb_connect(mem_ctx, ev_ctx, lp_ctx, system_session(lp_ctx), 0);
1363         if (ldb == NULL) {
1364                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1365         }
1366
1367         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1368                                   format_offered,
1369                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1370                                   name,
1371                                   &info1);
1372         if (!W_ERROR_IS_OK(werr)) {
1373                 return werror_to_ntstatus(werr);
1374         }
1375         switch (info1.status) {
1376         case DRSUAPI_DS_NAME_STATUS_OK:
1377                 break;
1378         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1379         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1380         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1381                 return NT_STATUS_NO_SUCH_USER;
1382         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1383         default:
1384                 return NT_STATUS_UNSUCCESSFUL;
1385         }
1386
1387         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1388         if (*nt4_domain == NULL) {
1389                 return NT_STATUS_NO_MEMORY;
1390         }
1391
1392         p = strchr(*nt4_domain, '\\');
1393         if (!p) {
1394                 return NT_STATUS_INVALID_PARAMETER;
1395         }
1396         p[0] = '\0';
1397
1398         *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1399         if (*nt4_account == NULL) {
1400                 return NT_STATUS_NO_MEMORY;
1401         }
1402
1403         return NT_STATUS_OK;
1404 }
1405
1406 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1407                                      struct tevent_context *ev_ctx,
1408                                      struct loadparm_context *lp_ctx,
1409                                      const char *name,
1410                                      const char **nt4_domain,
1411                                      const char **nt4_account)
1412 {
1413         enum drsuapi_DsNameFormat format_offered = DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
1414
1415         /* Handle anonymous bind */
1416         if (!name || !*name) {
1417                 *nt4_domain = "";
1418                 *nt4_account = "";
1419                 return NT_STATUS_OK;
1420         }
1421
1422         if (strchr_m(name, '=')) {
1423                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1424         } else if (strchr_m(name, '@')) {
1425                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1426         } else if (strchr_m(name, '\\')) {
1427                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1428         } else if (strchr_m(name, '/')) {
1429                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1430         } else {
1431                 return NT_STATUS_NO_SUCH_USER;
1432         }
1433
1434         return crack_name_to_nt4_name(mem_ctx, ev_ctx, lp_ctx, format_offered, name, nt4_domain, nt4_account);
1435 }
1436
1437
1438 WERROR dcesrv_drsuapi_ListRoles(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1439                                 const struct drsuapi_DsNameRequest1 *req1,
1440                                 struct drsuapi_DsNameCtr1 **ctr1)
1441 {
1442         struct drsuapi_DsNameInfo1 *names;
1443         uint32_t i;
1444         uint32_t count = 5;/*number of fsmo role owners we are going to return*/
1445
1446         *ctr1 = talloc(mem_ctx, struct drsuapi_DsNameCtr1);
1447         W_ERROR_HAVE_NO_MEMORY(*ctr1);
1448         names = talloc_array(mem_ctx, struct drsuapi_DsNameInfo1, count);
1449         W_ERROR_HAVE_NO_MEMORY(names);
1450
1451         for (i = 0; i < count; i++) {
1452                 WERROR werr;
1453                 struct ldb_dn *role_owner_dn, *fsmo_role_dn, *server_dn;
1454                 werr = dsdb_get_fsmo_role_info(mem_ctx, sam_ctx, i,
1455                                                &fsmo_role_dn, &role_owner_dn);
1456                 if(!W_ERROR_IS_OK(werr)) {
1457                         return werr;
1458                 }
1459                 server_dn = ldb_dn_copy(mem_ctx, role_owner_dn);
1460                 ldb_dn_remove_child_components(server_dn, 1);
1461                 names[i].status = DRSUAPI_DS_NAME_STATUS_OK;
1462                 names[i].dns_domain_name = samdb_dn_to_dnshostname(sam_ctx, mem_ctx,
1463                                                                    server_dn);
1464                 if(!names[i].dns_domain_name) {
1465                         DEBUG(4, ("list_roles: Failed to find dNSHostName for server %s\n",
1466                                   ldb_dn_get_linearized(server_dn)));
1467                 }
1468                 names[i].result_name = talloc_strdup(mem_ctx, ldb_dn_get_linearized(role_owner_dn));
1469         }
1470
1471         (*ctr1)->count = count;
1472         (*ctr1)->array = names;
1473
1474         return WERR_OK;
1475 }
1476
1477 WERROR dcesrv_drsuapi_CrackNamesByNameFormat(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1478                                              const struct drsuapi_DsNameRequest1 *req1,
1479                                              struct drsuapi_DsNameCtr1 **ctr1)
1480 {
1481         struct drsuapi_DsNameInfo1 *names;
1482         uint32_t i, count;
1483         WERROR status;
1484
1485         *ctr1 = talloc_zero(mem_ctx, struct drsuapi_DsNameCtr1);
1486         W_ERROR_HAVE_NO_MEMORY(*ctr1);
1487
1488         count = req1->count;
1489         names = talloc_array(mem_ctx, struct drsuapi_DsNameInfo1, count);
1490         W_ERROR_HAVE_NO_MEMORY(names);
1491
1492         for (i=0; i < count; i++) {
1493                 status = DsCrackNameOneName(sam_ctx, mem_ctx,
1494                                             req1->format_flags,
1495                                             req1->format_offered,
1496                                             req1->format_desired,
1497                                             req1->names[i].str,
1498                                             &names[i]);
1499                 if (!W_ERROR_IS_OK(status)) {
1500                         return status;
1501                 }
1502         }
1503
1504         (*ctr1)->count = count;
1505         (*ctr1)->array = names;
1506
1507         return WERR_OK;
1508 }
1509
1510 WERROR dcesrv_drsuapi_ListInfoServer(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1511                                      const struct drsuapi_DsNameRequest1 *req1,
1512                                      struct drsuapi_DsNameCtr1 **_ctr1)
1513 {
1514         struct drsuapi_DsNameInfo1 *names;
1515         struct ldb_result *res;
1516         struct ldb_dn *server_dn, *dn;
1517         struct drsuapi_DsNameCtr1 *ctr1;
1518         int ret, i;
1519         const char *str;
1520         const char *attrs[] = {
1521                 "dn",
1522                 "dNSHostName",
1523                 "serverReference",
1524                 NULL
1525         };
1526
1527         *_ctr1 = NULL;
1528
1529         ctr1 = talloc_zero(mem_ctx, struct drsuapi_DsNameCtr1);
1530         W_ERROR_HAVE_NO_MEMORY(ctr1);
1531
1532         /*
1533          * No magic value here, we have to return 3 entries according to the
1534          * MS-DRSR.pdf
1535          */
1536         ctr1->count = 3;
1537         names = talloc_zero_array(ctr1, struct drsuapi_DsNameInfo1,
1538                                   ctr1->count);
1539         W_ERROR_HAVE_NO_MEMORY(names);
1540         ctr1->array = names;
1541
1542         for (i=0; i < ctr1->count; i++) {
1543                 names[i].status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1544         }
1545         *_ctr1 = ctr1;
1546
1547         if (req1->count != 1) {
1548                 DEBUG(1, ("Expected a count of 1 for the ListInfoServer crackname \n"));
1549                 return WERR_OK;
1550         }
1551
1552         if (req1->names[0].str == NULL) {
1553                 return WERR_OK;
1554         }
1555
1556         server_dn = ldb_dn_new(mem_ctx, sam_ctx, req1->names[0].str);
1557         W_ERROR_HAVE_NO_MEMORY(server_dn);
1558
1559         ret = ldb_search(sam_ctx, mem_ctx, &res, server_dn, LDB_SCOPE_ONELEVEL,
1560                          NULL, "(objectClass=nTDSDSA)");
1561
1562         if (ret != LDB_SUCCESS) {
1563                 DEBUG(1, ("Search for objectClass=nTDSDSA "
1564                           "returned less than 1 objects\n"));
1565                 return WERR_OK;
1566         }
1567
1568         if (res->count != 1) {
1569                 DEBUG(1, ("Search for objectClass=nTDSDSA "
1570                           "returned less than 1 objects\n"));
1571                 return WERR_OK;
1572         }
1573
1574         if (res->msgs[0]->dn) {
1575                 names[0].result_name = ldb_dn_alloc_linearized(names, res->msgs[0]->dn);
1576                 W_ERROR_HAVE_NO_MEMORY(names[0].result_name);
1577                 names[0].status = DRSUAPI_DS_NAME_STATUS_OK;
1578         }
1579
1580         talloc_free(res);
1581
1582         ret = ldb_search(sam_ctx, mem_ctx, &res, server_dn, LDB_SCOPE_BASE,
1583                          attrs, "(objectClass=*)");
1584         if (ret != LDB_SUCCESS) {
1585                 DEBUG(1, ("Search for objectClass=* on dn %s"
1586                           "returned %s\n", req1->names[0].str,
1587                           ldb_strerror(ret)));
1588                 return WERR_OK;
1589         }
1590
1591         if (res->count != 1) {
1592                 DEBUG(1, ("Search for objectClass=* on dn %s"
1593                           "returned less than 1 objects\n", req1->names[0].str));
1594                 return WERR_OK;
1595         }
1596
1597         str = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
1598         if (str != NULL) {
1599                 names[1].result_name = talloc_strdup(names, str);
1600                 W_ERROR_HAVE_NO_MEMORY(names[1].result_name);
1601                 names[1].status = DRSUAPI_DS_NAME_STATUS_OK;
1602         }
1603
1604         dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, res->msgs[0], "serverReference");
1605         if (dn != NULL) {
1606                 names[2].result_name = ldb_dn_alloc_linearized(names, dn);
1607                 W_ERROR_HAVE_NO_MEMORY(names[2].result_name);
1608                 names[2].status = DRSUAPI_DS_NAME_STATUS_OK;
1609         }
1610
1611         talloc_free(dn);
1612         talloc_free(res);
1613
1614         return WERR_OK;
1615 }