source4/dsdb/samdb/cracknames.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    endpoint server for the drsuapi pipe
   5    DsCrackNames()
   6
   7    Copyright (C) Stefan Metzmacher 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/gen_ndr/drsuapi.h"
  26 #include "lib/events/events.h"
  27 #include "rpc_server/common/common.h"
  28 #include "lib/ldb/include/ldb.h"
  29 #include "lib/ldb/include/ldb_errors.h"
  30 #include "system/kerberos.h"
  31 #include "auth/kerberos/kerberos.h"
  32 #include "libcli/ldap/ldap_ndr.h"
  33 #include "libcli/security/security.h"
  34 #include "auth/auth.h"
  35 #include "../lib/util/util_ldb.h"
  36 #include "dsdb/samdb/samdb.h"
  37 #include "dsdb/common/util.h"
  38 #include "param/param.h"
  39
  40 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  41                                    struct smb_krb5_context *smb_krb5_context,
  42                                    uint32_t format_flags, uint32_t format_offered, uint32_t 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);
  46 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  47                                         uint32_t format_offered, uint32_t format_desired,
  48                                         struct ldb_dn *name_dn, const char *name,
  49                                         struct drsuapi_DsNameInfo1 *info1);
  50
  51 static WERROR dns_domain_from_principal(TALLOC_CTX *mem_ctx, struct smb_krb5_context *smb_krb5_context,
  52                                         const char *name,
  53                                         struct drsuapi_DsNameInfo1 *info1)
  54 {
  55         krb5_error_code ret;
  56         krb5_principal principal;
  57         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
  58         const char *realm;
  59         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
  60                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
  61         if (ret) {
  62                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  63                 return WERR_OK;
  64         }
  65
  66         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
  67         realm = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
  68
  69         info1->dns_domain_name  = talloc_strdup(mem_ctx, realm);
  70         krb5_free_principal(smb_krb5_context->krb5_context, principal);
  71
  72         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
  73
  74         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
  75         return WERR_OK;
  76 }
  77
  78 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  79                                                       TALLOC_CTX *mem_ctx,
  80                                                       const char *alias_from,
  81                                                       char **alias_to)
  82 {
  83         int i;
  84         int ret;
  85         struct ldb_result *res;
  86         struct ldb_message_element *spnmappings;
  87         TALLOC_CTX *tmp_ctx;
  88         struct ldb_dn *service_dn;
  89         char *service_dn_str;
  90
  91         const char *directory_attrs[] = {
  92                 "sPNMappings",
  93                 NULL
  94         };
  95
  96         tmp_ctx = talloc_new(mem_ctx);
  97         if (!tmp_ctx) {
  98                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  99         }
 100
 101         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
 102         if ( ! ldb_dn_add_base(service_dn, samdb_config_dn(ldb_ctx))) {
 103                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 104         }
 105         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
 106         if ( ! service_dn_str) {
 107                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 108         }
 109
 110         ret = ldb_search(ldb_ctx, tmp_ctx, &res, service_dn, LDB_SCOPE_BASE,
 111                          directory_attrs, "(objectClass=nTDSService)");
 112
 113         if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) {
 114                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
 115                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 116         } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 117                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
 118                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 119         } else if (res->count != 1) {
 120                 talloc_free(res);
 121                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
 122                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 123         }
 124
 125         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
 126         if (!spnmappings || spnmappings->num_values == 0) {
 127                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
 128                 talloc_free(tmp_ctx);
 129                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 130         }
 131
 132         for (i = 0; i < spnmappings->num_values; i++) {
 133                 char *mapping, *p, *str;
 134                 mapping = talloc_strdup(tmp_ctx,
 135                                         (const char *)spnmappings->values[i].data);
 136                 if (!mapping) {
 137                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 138                         talloc_free(tmp_ctx);
 139                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 140                 }
 141
 142                 /* C string manipulation sucks */
 143
 144                 p = strchr(mapping, '=');
 145                 if (!p) {
 146                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 147                                   service_dn_str, mapping));
 148                         talloc_free(tmp_ctx);
 149                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 150                 }
 151                 p[0] = '\0';
 152                 p++;
 153                 do {
 154                         str = p;
 155                         p = strchr(p, ',');
 156                         if (p) {
 157                                 p[0] = '\0';
 158                                 p++;
 159                         }
 160                         if (strcasecmp(str, alias_from) == 0) {
 161                                 *alias_to = mapping;
 162                                 talloc_steal(mem_ctx, mapping);
 163                                 talloc_free(tmp_ctx);
 164                                 return DRSUAPI_DS_NAME_STATUS_OK;
 165                         }
 166                 } while (p);
 167         }
 168         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 169         talloc_free(tmp_ctx);
 170         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 171 }
 172
 173 /* When cracking a ServicePrincipalName, many services may be served
 174  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 175  * but we translate it here, and search on host/.  This is done after
 176  * the cifs/ entry has been searched for, making this a fallback */
 177
 178 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 179                                   struct smb_krb5_context *smb_krb5_context,
 180                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 181                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 182 {
 183         WERROR wret;
 184         krb5_error_code ret;
 185         krb5_principal principal;
 186         const char *service, *dns_name;
 187         char *new_service;
 188         char *new_princ;
 189         enum drsuapi_DsNameStatus namestatus;
 190
 191         /* parse principal */
 192         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 193                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 194         if (ret) {
 195                 DEBUG(2, ("Could not parse principal: %s: %s",
 196                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 197                                                            ret, mem_ctx)));
 198                 return WERR_NOMEM;
 199         }
 200
 201         /* grab cifs/, http/ etc */
 202
 203         /* This is checked for in callers, but be safe */
 204         if (principal->name.name_string.len < 2) {
 205                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 206                 return WERR_OK;
 207         }
 208         service = principal->name.name_string.val[0];
 209         dns_name = principal->name.name_string.val[1];
 210
 211         /* MAP it */
 212         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 213                                           sam_ctx, mem_ctx,
 214                                           service, &new_service);
 215
 216         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 217                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 218                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 219                 if (!info1->dns_domain_name) {
 220                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 221                         return WERR_NOMEM;
 222                 }
 223                 return WERR_OK;
 224         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 225                 info1->status = namestatus;
 226                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 227                 return WERR_OK;
 228         }
 229
 230         /* ooh, very nasty playing around in the Principal... */
 231         free(principal->name.name_string.val[0]);
 232         principal->name.name_string.val[0] = strdup(new_service);
 233         if (!principal->name.name_string.val[0]) {
 234                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 235                 return WERR_NOMEM;
 236         }
 237
 238         /* reform principal */
 239         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 240                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
 241
 242         if (ret) {
 243                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 244                 return WERR_NOMEM;
 245         }
 246
 247         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 248                                   new_princ, info1);
 249         free(new_princ);
 250         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
 251                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 252                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 253                 if (!info1->dns_domain_name) {
 254                         wret = WERR_NOMEM;
 255                 }
 256         }
 257         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 258         return wret;
 259 }
 260
 261 /* Subcase of CrackNames, for the userPrincipalName */
 262
 263 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 264                              struct smb_krb5_context *smb_krb5_context,
 265                              uint32_t format_flags, uint32_t format_offered, uint32_t 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 = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
 293
 294         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 295                                      samdb_partitions_dn(sam_ctx, mem_ctx),
 296                                      LDB_SCOPE_ONELEVEL,
 297                                      domain_attrs,
 298                                      "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 299                                      ldb_binary_encode_string(mem_ctx, realm),
 300                                      ldb_binary_encode_string(mem_ctx, realm));
 301
 302         if (ldb_ret != LDB_SUCCESS) {
 303                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s", ldb_errstring(sam_ctx)));
 304                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 305                 return WERR_OK;
 306         }
 307
 308         switch (domain_res->count) {
 309         case 1:
 310                 break;
 311         case 0:
 312                 return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 313                                                  name, info1);
 314         default:
 315                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 316                 return WERR_OK;
 317         }
 318
 319         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 320                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 321         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 322
 323         if (ret) {
 324                 free(unparsed_name_short);
 325                 return WERR_NOMEM;
 326         }
 327
 328         /* This may need to be extended for more userPrincipalName variations */
 329         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 330                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 331
 332         domain_filter = talloc_asprintf(mem_ctx, "(distinguishedName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
 333
 334         if (!result_filter || !domain_filter) {
 335                 free(unparsed_name_short);
 336                 return WERR_NOMEM;
 337         }
 338         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 339                                       smb_krb5_context,
 340                                       format_flags, format_offered, format_desired,
 341                                       NULL, unparsed_name_short, domain_filter, result_filter,
 342                                       info1);
 343         free(unparsed_name_short);
 344
 345         return status;
 346 }
 347
 348 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 349
 350 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 351                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 352                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 353 {
 354         krb5_error_code ret;
 355         const char *domain_filter = NULL;
 356         const char *result_filter = NULL;
 357         struct ldb_dn *name_dn = NULL;
 358
 359         struct smb_krb5_context *smb_krb5_context = NULL;
 360
 361         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 362         info1->dns_domain_name = NULL;
 363         info1->result_name = NULL;
 364
 365         if (!name) {
 366                 return WERR_INVALID_PARAM;
 367         }
 368
 369         /* TODO: - fill the correct names in all cases!
 370          *       - handle format_flags
 371          */
 372
 373         /* here we need to set the domain_filter and/or the result_filter */
 374         switch (format_offered) {
 375         case DRSUAPI_DS_NAME_FORMAT_UNKNOWN:
 376         {
 377                 int i;
 378                 enum drsuapi_DsNameFormat formats[] = {
 379                         DRSUAPI_DS_NAME_FORMAT_FQDN_1779, DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 380                         DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT, DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 381                         DRSUAPI_DS_NAME_FORMAT_GUID, DRSUAPI_DS_NAME_FORMAT_DISPLAY,
 382                         DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 383                         DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY,
 384                         DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX
 385                 };
 386                 WERROR werr;
 387                 for (i=0; i < ARRAY_SIZE(formats); i++) {
 388                         werr = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, formats[i], format_desired, name, info1);
 389                         if (!W_ERROR_IS_OK(werr)) {
 390                                 return werr;
 391                         }
 392                         if (info1->status != DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 393                                 return werr;
 394                         }
 395                 }
 396                 return werr;
 397         }
 398
 399         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 400         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 401         {
 402                 char *str, *s, *account;
 403
 404                 if (strlen(name) == 0) {
 405                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 406                         return WERR_OK;
 407                 }
 408
 409                 str = talloc_strdup(mem_ctx, name);
 410                 W_ERROR_HAVE_NO_MEMORY(str);
 411
 412                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 413                         /* Look backwards for the \n, and replace it with / */
 414                         s = strrchr(str, '\n');
 415                         if (!s) {
 416                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 417                                 return WERR_OK;
 418                         }
 419                         s[0] = '/';
 420                 }
 421
 422                 s = strchr(str, '/');
 423                 if (!s) {
 424                         /* there must be at least one / */
 425                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 426                         return WERR_OK;
 427                 }
 428
 429                 s[0] = '\0';
 430                 s++;
 431
 432                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))",
 433                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
 434                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 435
 436                 /* There may not be anything after the domain component (search for the domain itself) */
 437                 if (s[0]) {
 438
 439                         account = strrchr(s, '/');
 440                         if (!account) {
 441                                 account = s;
 442                         } else {
 443                                 account++;
 444                         }
 445                         account = ldb_binary_encode_string(mem_ctx, account);
 446                         W_ERROR_HAVE_NO_MEMORY(account);
 447                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 448                                                         account);
 449                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 450                 }
 451                 break;
 452         }
 453         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 454                 char *p;
 455                 char *domain;
 456                 const char *account = NULL;
 457
 458                 domain = talloc_strdup(mem_ctx, name);
 459                 W_ERROR_HAVE_NO_MEMORY(domain);
 460
 461                 p = strchr(domain, '\\');
 462                 if (!p) {
 463                         /* invalid input format */
 464                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 465                         return WERR_OK;
 466                 }
 467                 p[0] = '\0';
 468
 469                 if (p[1]) {
 470                         account = &p[1];
 471                 }
 472
 473                 domain_filter = talloc_asprintf(mem_ctx,
 474                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 475                                                 ldb_binary_encode_string(mem_ctx, domain));
 476                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 477                 if (account) {
 478                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 479                                                         ldb_binary_encode_string(mem_ctx, account));
 480                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 481                 }
 482
 483                 talloc_free(domain);
 484                 break;
 485         }
 486
 487                 /* A LDAP DN as a string */
 488         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 489                 domain_filter = NULL;
 490                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 491                 if (! ldb_dn_validate(name_dn)) {
 492                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 493                         return WERR_OK;
 494                 }
 495                 break;
 496         }
 497
 498                 /* A GUID as a string */
 499         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 500                 struct GUID guid;
 501                 char *ldap_guid;
 502                 NTSTATUS nt_status;
 503                 domain_filter = NULL;
 504
 505                 nt_status = GUID_from_string(name, &guid);
 506                 if (!NT_STATUS_IS_OK(nt_status)) {
 507                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 508                         return WERR_OK;
 509                 }
 510
 511                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 512                 if (!ldap_guid) {
 513                         return WERR_NOMEM;
 514                 }
 515                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 516                                                 ldap_guid);
 517                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 518                 break;
 519         }
 520         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 521                 domain_filter = NULL;
 522
 523                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 524                                                 ldb_binary_encode_string(mem_ctx, name),
 525                                                 ldb_binary_encode_string(mem_ctx, name));
 526                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 527                 break;
 528         }
 529
 530                 /* A S-1234-5678 style string */
 531         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 532                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 533                 char *ldap_sid;
 534
 535                 domain_filter = NULL;
 536                 if (!sid) {
 537                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 538                         return WERR_OK;
 539                 }
 540                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 541                                                    sid);
 542                 if (!ldap_sid) {
 543                         return WERR_NOMEM;
 544                 }
 545                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 546                                                 ldap_sid);
 547                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 548                 break;
 549         }
 550         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 551                 krb5_principal principal;
 552                 char *unparsed_name;
 553
 554                 ret = smb_krb5_init_context(mem_ctx,
 555                                             ldb_get_event_context(sam_ctx),
 556                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 557                                             &smb_krb5_context);
 558
 559                 if (ret) {
 560                         return WERR_NOMEM;
 561                 }
 562
 563                 /* Ensure we reject compleate junk first */
 564                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 565                 if (ret) {
 566                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 567                         return WERR_OK;
 568                 }
 569
 570                 domain_filter = NULL;
 571
 572                 /* By getting the unparsed name here, we ensure the escaping is correct (and trust the client less) */
 573                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 574                 if (ret) {
 575                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 576                         return WERR_NOMEM;
 577                 }
 578
 579                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 580
 581                 /* The ldb_binary_encode_string() here avoid LDAP filter injection attacks */
 582                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 583                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 584
 585                 free(unparsed_name);
 586                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 587                 break;
 588         }
 589         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 590                 krb5_principal principal;
 591                 char *unparsed_name_short;
 592                 char *service;
 593
 594                 ret = smb_krb5_init_context(mem_ctx,
 595                                             ldb_get_event_context(sam_ctx),
 596                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 597                                             &smb_krb5_context);
 598
 599                 if (ret) {
 600                         return WERR_NOMEM;
 601                 }
 602
 603                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 604                 if (ret == 0 && principal->name.name_string.len < 2) {
 605                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 606                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 607                         return WERR_OK;
 608                 }
 609                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 610                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 611                 if (ret) {
 612                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 613
 614                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 615                                                          name, info1);
 616                 }
 617
 618                 domain_filter = NULL;
 619
 620                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 621                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 622                 if (ret) {
 623                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 624                         return WERR_NOMEM;
 625                 }
 626
 627                 service = principal->name.name_string.val[0];
 628                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 629                         /* the 'cn' attribute is just the leading part of the name */
 630                         char *computer_name;
 631                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 632                                                       strcspn(principal->name.name_string.val[1], "."));
 633                         if (computer_name == NULL) {
 634                                 return WERR_NOMEM;
 635                         }
 636
 637                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 638                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 639                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 640                 } else {
 641                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 642                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 643                 }
 644                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 645                 free(unparsed_name_short);
 646                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 647
 648                 break;
 649         }
 650         default: {
 651                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 652                 return WERR_OK;
 653         }
 654
 655         }
 656
 657         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 658                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 659                                                  name_dn, name, info1);
 660         }
 661
 662         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 663                                     smb_krb5_context,
 664                                     format_flags, format_offered, format_desired,
 665                                     name_dn, name,
 666                                     domain_filter, result_filter,
 667                                     info1);
 668 }
 669
 670 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 671  * (FQDN_1779) into a canoical name without actually searching the
 672  * database */
 673
 674 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 675                                         uint32_t format_offered, uint32_t format_desired,
 676                                         struct ldb_dn *name_dn, const char *name,
 677                                         struct drsuapi_DsNameInfo1 *info1)
 678 {
 679         char *cracked;
 680         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 681                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 682                 return WERR_OK;
 683         }
 684
 685         switch (format_desired) {
 686         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 687                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 688                 break;
 689         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 690                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 691                 break;
 692         default:
 693                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 694                 return WERR_OK;
 695         }
 696         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 697         info1->result_name      = cracked;
 698         if (!cracked) {
 699                 return WERR_NOMEM;
 700         }
 701
 702         return WERR_OK;
 703 }
 704
 705 /* Given a filter for the domain, and one for the result, perform the
 706  * ldb search. The format offered and desired flags change the
 707  * behaviours, including what attributes to return.
 708  *
 709  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 710  */
 711
 712 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 713                                    struct smb_krb5_context *smb_krb5_context,
 714                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 715                                    struct ldb_dn *name_dn, const char *name,
 716                                    const char *domain_filter, const char *result_filter,
 717                                    struct drsuapi_DsNameInfo1 *info1)
 718 {
 719         int ldb_ret;
 720         struct ldb_result *domain_res = NULL;
 721         const char * const *domain_attrs;
 722         const char * const *result_attrs;
 723         struct ldb_message **result_res = NULL;
 724         struct ldb_message *result = NULL;
 725         int i;
 726         char *p;
 727         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 728
 729         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 730         const char * const _result_attrs_null[] = { NULL };
 731
 732         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 733         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 734
 735         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 736         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 737
 738         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 739         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 740
 741         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 742         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 743
 744         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
 745         const char * const _result_attrs_none[] = { NULL};
 746
 747         /* here we need to set the attrs lists for domain and result lookups */
 748         switch (format_desired) {
 749         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 750         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 751                 domain_attrs = _domain_attrs_1779;
 752                 result_attrs = _result_attrs_null;
 753                 break;
 754         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 755                 domain_attrs = _domain_attrs_canonical;
 756                 result_attrs = _result_attrs_canonical;
 757                 break;
 758         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 759                 domain_attrs = _domain_attrs_nt4;
 760                 result_attrs = _result_attrs_nt4;
 761                 break;
 762         case DRSUAPI_DS_NAME_FORMAT_GUID:
 763                 domain_attrs = _domain_attrs_guid;
 764                 result_attrs = _result_attrs_guid;
 765                 break;
 766         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 767                 domain_attrs = _domain_attrs_display;
 768                 result_attrs = _result_attrs_display;
 769                 break;
 770         default:
 771                 domain_attrs = _domain_attrs_none;
 772                 result_attrs = _result_attrs_none;
 773                 break;
 774         }
 775
 776         if (domain_filter) {
 777                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 778                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 779                                              partitions_basedn,
 780                                              LDB_SCOPE_ONELEVEL,
 781                                              domain_attrs,
 782                                              "%s", domain_filter);
 783
 784                 if (ldb_ret != LDB_SUCCESS) {
 785                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 786                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 787                         return WERR_OK;
 788                 }
 789
 790                 switch (domain_res->count) {
 791                 case 1:
 792                         break;
 793                 case 0:
 794                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 795                         return WERR_OK;
 796                 default:
 797                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 798                         return WERR_OK;
 799                 }
 800
 801                 info1->dns_domain_name  = samdb_result_string(domain_res->msgs[0], "dnsRoot", NULL);
 802                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 803                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 804         } else {
 805                 info1->dns_domain_name  = NULL;
 806                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 807         }
 808
 809         if (result_filter) {
 810                 int ret;
 811                 struct ldb_result *res;
 812                 uint32_t dsdb_flags = 0;
 813                 struct ldb_dn *search_dn;
 814
 815                 if (domain_res) {
 816                         dsdb_flags = 0;
 817                         search_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 818                 } else {
 819                         dsdb_flags = DSDB_SEARCH_SEARCH_ALL_PARTITIONS;
 820                         search_dn = ldb_get_root_basedn(sam_ctx);
 821                 }
 822
 823                 /* search with the 'phantom root' flag */
 824                 ret = dsdb_search(sam_ctx, mem_ctx, &res,
 825                                   search_dn,
 826                                   LDB_SCOPE_SUBTREE,
 827                                   result_attrs,
 828                                   DSDB_SEARCH_SEARCH_ALL_PARTITIONS,
 829                                   "%s", result_filter);
 830                 if (ret != LDB_SUCCESS) {
 831                         DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s",
 832                                   ldb_errstring(sam_ctx)));
 833                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 834                         return WERR_OK;
 835                 }
 836
 837                 ldb_ret = res->count;
 838                 result_res = res->msgs;
 839         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 840                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 841                                           result_attrs);
 842         } else if (domain_res) {
 843                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 844                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 845                                           result_attrs);
 846         } else {
 847                 /* Can't happen */
 848                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not availible: This can't happen..."));
 849                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 850                 return WERR_OK;
 851         }
 852
 853         switch (ldb_ret) {
 854         case 1:
 855                 result = result_res[0];
 856                 break;
 857         case 0:
 858                 switch (format_offered) {
 859                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 860                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 861                                                    smb_krb5_context,
 862                                                    format_flags, format_offered, format_desired,
 863                                                    name, info1);
 864
 865                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 866                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 867                                               format_flags, format_offered, format_desired,
 868                                               name, info1);
 869                 }
 870                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 871                 return WERR_OK;
 872         case -1:
 873                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
 874                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 875                 return WERR_OK;
 876         default:
 877                 switch (format_offered) {
 878                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 879                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 880                 {
 881                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
 882                         /* We may need to manually filter further */
 883                         for (i = 0; i < ldb_ret; i++) {
 884                                 switch (format_offered) {
 885                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 886                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
 887                                         break;
 888                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 889                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
 890                                         break;
 891                                 }
 892                                 if (strcasecmp_m(canonical_name, name) == 0) {
 893                                         result = result_res[i];
 894                                         break;
 895                                 }
 896                         }
 897                         if (!result) {
 898                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 899                                 return WERR_OK;
 900                         }
 901                 }
 902                 default:
 903                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 904                         return WERR_OK;
 905                 }
 906         }
 907
 908         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
 909         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 910         p = strchr(info1->dns_domain_name, '/');
 911         if (p) {
 912                 p[0] = '\0';
 913         }
 914
 915         /* here we can use result and domain_res[0] */
 916         switch (format_desired) {
 917         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 918                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
 919                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 920
 921                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 922                 return WERR_OK;
 923         }
 924         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 925                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
 926                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 927                 return WERR_OK;
 928         }
 929         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 930                 /* Not in the virtual ldb attribute */
 931                 return DsCrackNameOneSyntactical(mem_ctx,
 932                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 933                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 934                                                  result->dn, name, info1);
 935         }
 936         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 937
 938                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
 939                 const char *_acc = "", *_dom = "";
 940
 941                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
 942
 943                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 944                                                      partitions_basedn,
 945                                                      LDB_SCOPE_ONELEVEL,
 946                                                      domain_attrs,
 947                                                      "(ncName=%s)", ldb_dn_get_linearized(result->dn));
 948
 949                         if (ldb_ret != LDB_SUCCESS) {
 950                                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 951                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 952                                 return WERR_OK;
 953                         }
 954
 955                         switch (domain_res->count) {
 956                         case 1:
 957                                 break;
 958                         case 0:
 959                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 960                                 return WERR_OK;
 961                         default:
 962                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 963                                 return WERR_OK;
 964                         }
 965                         _dom = samdb_result_string(domain_res->msgs[0], "nETBIOSName", NULL);
 966                         W_ERROR_HAVE_NO_MEMORY(_dom);
 967                 } else {
 968                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
 969                         if (!_acc) {
 970                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 971                                 return WERR_OK;
 972                         }
 973                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
 974                                 _dom = "BUILTIN";
 975                         } else {
 976                                 const char *attrs[] = { NULL };
 977                                 struct ldb_result *domain_res2;
 978                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 979                                 if (!dom_sid) {
 980                                         return WERR_OK;
 981                                 }
 982                                 dom_sid->num_auths--;
 983                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 984                                                              NULL,
 985                                                              LDB_SCOPE_BASE,
 986                                                              attrs,
 987                                                              "(&(objectSid=%s)(objectClass=domain))",
 988                                                              ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 989
 990                                 if (ldb_ret != LDB_SUCCESS) {
 991                                         DEBUG(2, ("DsCrackNameOneFilter domain search failed: %s", ldb_errstring(sam_ctx)));
 992                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 993                                         return WERR_OK;
 994                                 }
 995
 996                                 switch (domain_res->count) {
 997                                 case 1:
 998                                         break;
 999                                 case 0:
1000                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1001                                         return WERR_OK;
1002                                 default:
1003                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1004                                         return WERR_OK;
1005                                 }
1006
1007                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res2,
1008                                                              partitions_basedn,
1009                                                              LDB_SCOPE_ONELEVEL,
1010                                                              domain_attrs,
1011                                                              "(ncName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
1012
1013                                 if (ldb_ret != LDB_SUCCESS) {
1014                                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
1015                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1016                                         return WERR_OK;
1017                                 }
1018
1019                                 switch (domain_res2->count) {
1020                                 case 1:
1021                                         break;
1022                                 case 0:
1023                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1024                                         return WERR_OK;
1025                                 default:
1026                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1027                                         return WERR_OK;
1028                                 }
1029                                 _dom = samdb_result_string(domain_res2->msgs[0], "nETBIOSName", NULL);
1030                                 W_ERROR_HAVE_NO_MEMORY(_dom);
1031                         }
1032                 }
1033
1034                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
1035                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1036
1037                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1038                 return WERR_OK;
1039         }
1040         case DRSUAPI_DS_NAME_FORMAT_GUID: {
1041                 struct GUID guid;
1042
1043                 guid = samdb_result_guid(result, "objectGUID");
1044
1045                 info1->result_name      = GUID_string2(mem_ctx, &guid);
1046                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1047
1048                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1049                 return WERR_OK;
1050         }
1051         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
1052                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
1053                 if (!info1->result_name) {
1054                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
1055                 }
1056                 if (!info1->result_name) {
1057                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1058                 } else {
1059                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
1060                 }
1061                 return WERR_OK;
1062         }
1063         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
1064                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1065                 return WERR_OK;
1066         }
1067         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
1068         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
1069                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1070                 return WERR_OK;
1071         }
1072         default:
1073                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1074                 return WERR_OK;
1075         }
1076 }
1077
1078 /* Given a user Principal Name (such as foo@bar.com),
1079  * return the user and domain DNs.  This is used in the KDC to then
1080  * return the Keys and evaluate policy */
1081
1082 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1083                                    TALLOC_CTX *mem_ctx,
1084                                    const char *user_principal_name,
1085                                    struct ldb_dn **user_dn,
1086                                    struct ldb_dn **domain_dn)
1087 {
1088         WERROR werr;
1089         struct drsuapi_DsNameInfo1 info1;
1090         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1091                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1092                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1093                                   user_principal_name,
1094                                   &info1);
1095         if (!W_ERROR_IS_OK(werr)) {
1096                 return werror_to_ntstatus(werr);
1097         }
1098         switch (info1.status) {
1099         case DRSUAPI_DS_NAME_STATUS_OK:
1100                 break;
1101         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1102         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1103         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1104                 return NT_STATUS_NO_SUCH_USER;
1105         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1106         default:
1107                 return NT_STATUS_UNSUCCESSFUL;
1108         }
1109
1110         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1111
1112         if (domain_dn) {
1113                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1114                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1115                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1116                                           talloc_asprintf(mem_ctx, "%s/",
1117                                                           info1.dns_domain_name),
1118                                           &info1);
1119                 if (!W_ERROR_IS_OK(werr)) {
1120                         return werror_to_ntstatus(werr);
1121                 }
1122                 switch (info1.status) {
1123                 case DRSUAPI_DS_NAME_STATUS_OK:
1124                         break;
1125                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1126                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1127                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1128                         return NT_STATUS_NO_SUCH_USER;
1129                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1130                 default:
1131                         return NT_STATUS_UNSUCCESSFUL;
1132                 }
1133
1134                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1135         }
1136
1137         return NT_STATUS_OK;
1138 }
1139
1140 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1141  * return the user and domain DNs.  This is used in the KDC to then
1142  * return the Keys and evaluate policy */
1143
1144 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1145                                       TALLOC_CTX *mem_ctx,
1146                                       const char *service_principal_name,
1147                                       struct ldb_dn **user_dn,
1148                                       struct ldb_dn **domain_dn)
1149 {
1150         WERROR werr;
1151         struct drsuapi_DsNameInfo1 info1;
1152         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1153                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1154                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1155                                   service_principal_name,
1156                                   &info1);
1157         if (!W_ERROR_IS_OK(werr)) {
1158                 return werror_to_ntstatus(werr);
1159         }
1160         switch (info1.status) {
1161         case DRSUAPI_DS_NAME_STATUS_OK:
1162                 break;
1163         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1164         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1165         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1166                 return NT_STATUS_NO_SUCH_USER;
1167         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1168         default:
1169                 return NT_STATUS_UNSUCCESSFUL;
1170         }
1171
1172         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1173
1174         if (domain_dn) {
1175                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1176                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1177                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1178                                           talloc_asprintf(mem_ctx, "%s/",
1179                                                           info1.dns_domain_name),
1180                                           &info1);
1181                 if (!W_ERROR_IS_OK(werr)) {
1182                         return werror_to_ntstatus(werr);
1183                 }
1184                 switch (info1.status) {
1185                 case DRSUAPI_DS_NAME_STATUS_OK:
1186                         break;
1187                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1188                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1189                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1190                         return NT_STATUS_NO_SUCH_USER;
1191                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1192                 default:
1193                         return NT_STATUS_UNSUCCESSFUL;
1194                 }
1195
1196                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1197         }
1198
1199         return NT_STATUS_OK;
1200 }
1201
1202 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1203                                 struct tevent_context *ev_ctx,
1204                                 struct loadparm_context *lp_ctx,
1205                                 uint32_t format_offered,
1206                                 const char *name,
1207                                 const char **nt4_domain, const char **nt4_account)
1208 {
1209         WERROR werr;
1210         struct drsuapi_DsNameInfo1 info1;
1211         struct ldb_context *ldb;
1212         char *p;
1213
1214         /* Handle anonymous bind */
1215         if (!name || !*name) {
1216                 *nt4_domain = "";
1217                 *nt4_account = "";
1218                 return NT_STATUS_OK;
1219         }
1220
1221         ldb = samdb_connect(mem_ctx, ev_ctx, lp_ctx, system_session(lp_ctx));
1222         if (ldb == NULL) {
1223                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1224         }
1225
1226         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1227                                   format_offered,
1228                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1229                                   name,
1230                                   &info1);
1231         if (!W_ERROR_IS_OK(werr)) {
1232                 return werror_to_ntstatus(werr);
1233         }
1234         switch (info1.status) {
1235         case DRSUAPI_DS_NAME_STATUS_OK:
1236                 break;
1237         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1238         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1239         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1240                 return NT_STATUS_NO_SUCH_USER;
1241         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1242         default:
1243                 return NT_STATUS_UNSUCCESSFUL;
1244         }
1245
1246         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1247         if (*nt4_domain == NULL) {
1248                 return NT_STATUS_NO_MEMORY;
1249         }
1250
1251         p = strchr(*nt4_domain, '\\');
1252         if (!p) {
1253                 return NT_STATUS_INVALID_PARAMETER;
1254         }
1255         p[0] = '\0';
1256
1257         *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1258         if (*nt4_account == NULL) {
1259                 return NT_STATUS_NO_MEMORY;
1260         }
1261
1262         return NT_STATUS_OK;
1263 }
1264
1265 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1266                                      struct tevent_context *ev_ctx,
1267                                      struct loadparm_context *lp_ctx,
1268                                      const char *name,
1269                                      const char **nt4_domain,
1270                                      const char **nt4_account)
1271 {
1272         uint32_t format_offered = DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
1273
1274         /* Handle anonymous bind */
1275         if (!name || !*name) {
1276                 *nt4_domain = "";
1277                 *nt4_account = "";
1278                 return NT_STATUS_OK;
1279         }
1280
1281         if (strchr_m(name, '=')) {
1282                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1283         } else if (strchr_m(name, '@')) {
1284                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1285         } else if (strchr_m(name, '\\')) {
1286                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1287         } else if (strchr_m(name, '/')) {
1288                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1289         } else {
1290                 return NT_STATUS_NO_SUCH_USER;
1291         }
1292
1293         return crack_name_to_nt4_name(mem_ctx, ev_ctx, lp_ctx, format_offered, name, nt4_domain, nt4_account);
1294 }