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 "rpc_server/common/common.h"
  27 #include "lib/ldb/include/ldb_errors.h"
  28 #include "system/kerberos.h"
  29 #include "auth/kerberos/kerberos.h"
  30 #include "libcli/ldap/ldap.h"
  31 #include "libcli/security/security.h"
  32 #include "librpc/gen_ndr/ndr_misc.h"
  33 #include "auth/auth.h"
  34 #include "db_wrap.h"
  35 #include "dsdb/samdb/samdb.h"
  36
  37 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  38                                    struct smb_krb5_context *smb_krb5_context,
  39                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
  40                                    struct ldb_dn *name_dn, const char *name,
  41                                    const char *domain_filter, const char *result_filter,
  42                                    struct drsuapi_DsNameInfo1 *info1);
  43 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  44                                         uint32_t format_offered, uint32_t format_desired,
  45                                         struct ldb_dn *name_dn, const char *name,
  46                                         struct drsuapi_DsNameInfo1 *info1);
  47
  48 static WERROR dns_domain_from_principal(TALLOC_CTX *mem_ctx, struct smb_krb5_context *smb_krb5_context,
  49                                         const char *name,
  50                                         struct drsuapi_DsNameInfo1 *info1)
  51 {
  52         krb5_error_code ret;
  53         krb5_principal principal;
  54         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
  55         char **realm;
  56         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
  57                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
  58         if (ret) {
  59                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  60                 return WERR_OK;
  61         }
  62
  63         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
  64         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
  65
  66         info1->dns_domain_name  = talloc_strdup(mem_ctx, *realm);
  67         krb5_free_principal(smb_krb5_context->krb5_context, principal);
  68
  69         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
  70
  71         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
  72         return WERR_OK;
  73 }
  74
  75 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  76                                                       TALLOC_CTX *mem_ctx,
  77                                                       const char *alias_from,
  78                                                       char **alias_to)
  79 {
  80         int i;
  81         int ret;
  82         struct ldb_result *res;
  83         struct ldb_message_element *spnmappings;
  84         TALLOC_CTX *tmp_ctx;
  85         struct ldb_dn *service_dn;
  86         char *service_dn_str;
  87
  88         const char *directory_attrs[] = {
  89                 "sPNMappings",
  90                 NULL
  91         };
  92
  93         tmp_ctx = talloc_new(mem_ctx);
  94         if (!tmp_ctx) {
  95                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  96         }
  97
  98         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
  99         if ( ! ldb_dn_add_base(service_dn, samdb_config_dn(ldb_ctx))) {
 100                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 101         }
 102         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
 103         if ( ! service_dn_str) {
 104                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 105         }
 106
 107         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
 108                          directory_attrs, &res);
 109
 110         if (ret != LDB_SUCCESS) {
 111                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
 112                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 113         } else if (res->count != 1) {
 114                 talloc_free(res);
 115                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
 116                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 117         }
 118         talloc_steal(tmp_ctx, res);
 119
 120         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
 121         if (!spnmappings || spnmappings->num_values == 0) {
 122                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
 123                 talloc_free(tmp_ctx);
 124                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 125         }
 126
 127         for (i = 0; i < spnmappings->num_values; i++) {
 128                 char *mapping, *p, *str;
 129                 mapping = talloc_strdup(tmp_ctx,
 130                                         (const char *)spnmappings->values[i].data);
 131                 if (!mapping) {
 132                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 133                         talloc_free(tmp_ctx);
 134                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 135                 }
 136
 137                 /* C string manipulation sucks */
 138
 139                 p = strchr(mapping, '=');
 140                 if (!p) {
 141                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 142                                   service_dn_str, mapping));
 143                         talloc_free(tmp_ctx);
 144                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 145                 }
 146                 p[0] = '\0';
 147                 p++;
 148                 do {
 149                         str = p;
 150                         p = strchr(p, ',');
 151                         if (p) {
 152                                 p[0] = '\0';
 153                                 p++;
 154                         }
 155                         if (strcasecmp(str, alias_from) == 0) {
 156                                 *alias_to = mapping;
 157                                 talloc_steal(mem_ctx, mapping);
 158                                 talloc_free(tmp_ctx);
 159                                 return DRSUAPI_DS_NAME_STATUS_OK;
 160                         }
 161                 } while (p);
 162         }
 163         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 164         talloc_free(tmp_ctx);
 165         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 166 }
 167
 168 /* When cracking a ServicePrincipalName, many services may be served
 169  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 170  * but we translate it here, and search on host/.  This is done after
 171  * the cifs/ entry has been searched for, making this a fallback */
 172
 173 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 174                                   struct smb_krb5_context *smb_krb5_context,
 175                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 176                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 177 {
 178         WERROR wret;
 179         krb5_error_code ret;
 180         krb5_principal principal;
 181         const char *service, *dns_name;
 182         char *new_service;
 183         char *new_princ;
 184         enum drsuapi_DsNameStatus namestatus;
 185
 186         /* parse principal */
 187         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 188                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 189         if (ret) {
 190                 DEBUG(2, ("Could not parse principal: %s: %s",
 191                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 192                                                            ret, mem_ctx)));
 193                 return WERR_NOMEM;
 194         }
 195
 196         /* grab cifs/, http/ etc */
 197
 198         /* This is checked for in callers, but be safe */
 199         if (principal->name.name_string.len < 2) {
 200                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 201                 return WERR_OK;
 202         }
 203         service = principal->name.name_string.val[0];
 204         dns_name = principal->name.name_string.val[1];
 205
 206         /* MAP it */
 207         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 208                                           sam_ctx, mem_ctx,
 209                                           service, &new_service);
 210
 211         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 212                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 213                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 214                 if (!info1->dns_domain_name) {
 215                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 216                         return WERR_NOMEM;
 217                 }
 218                 return WERR_OK;
 219         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 220                 info1->status = namestatus;
 221                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 222                 return WERR_OK;
 223         }
 224
 225         /* ooh, very nasty playing around in the Principal... */
 226         free(principal->name.name_string.val[0]);
 227         principal->name.name_string.val[0] = strdup(new_service);
 228         if (!principal->name.name_string.val[0]) {
 229                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 230                 return WERR_NOMEM;
 231         }
 232
 233         /* reform principal */
 234         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 235                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
 236
 237         if (ret) {
 238                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 239                 return WERR_NOMEM;
 240         }
 241
 242         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 243                                   new_princ, info1);
 244         free(new_princ);
 245         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
 246                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 247                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 248                 if (!info1->dns_domain_name) {
 249                         wret = WERR_NOMEM;
 250                 }
 251         }
 252         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 253         return wret;
 254 }
 255
 256 /* Subcase of CrackNames, for the userPrincipalName */
 257
 258 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 259                              struct smb_krb5_context *smb_krb5_context,
 260                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 261                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 262 {
 263         int ldb_ret;
 264         WERROR status;
 265         const char *domain_filter = NULL;
 266         const char *result_filter = NULL;
 267         krb5_error_code ret;
 268         krb5_principal principal;
 269         char **realm;
 270         char *unparsed_name_short;
 271         const char *domain_attrs[] = { NULL };
 272         struct ldb_message **domain_res = NULL;
 273
 274         /* Prevent recursion */
 275         if (!name) {
 276                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 277                 return WERR_OK;
 278         }
 279
 280         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 281                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
 282         if (ret) {
 283                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 284                 return WERR_OK;
 285         }
 286
 287         domain_filter = NULL;
 288         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 289         domain_filter = talloc_asprintf(mem_ctx,
 290                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 291                                         ldb_binary_encode_string(mem_ctx, *realm),
 292                                         ldb_binary_encode_string(mem_ctx, *realm));
 293
 294         ldb_ret = gendb_search(sam_ctx, mem_ctx, samdb_partitions_dn(sam_ctx, mem_ctx),
 295                                &domain_res, domain_attrs,
 296                                "%s", domain_filter);
 297         switch (ldb_ret) {
 298         case 1:
 299                 break;
 300         case 0:
 301                 return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 302                                                  name, info1);
 303         case -1:
 304                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s", ldb_errstring(sam_ctx)));
 305                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 306                 return WERR_OK;
 307         default:
 308                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 309                 return WERR_OK;
 310         }
 311
 312         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 313                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 314         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 315
 316         if (ret) {
 317                 free(unparsed_name_short);
 318                 return WERR_NOMEM;
 319         }
 320
 321         /* This may need to be extended for more userPrincipalName variations */
 322         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 323                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 324         if (!result_filter || !domain_filter) {
 325                 free(unparsed_name_short);
 326                 return WERR_NOMEM;
 327         }
 328         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 329                                       smb_krb5_context,
 330                                       format_flags, format_offered, format_desired,
 331                                       NULL, unparsed_name_short, domain_filter, result_filter,
 332                                       info1);
 333         free(unparsed_name_short);
 334
 335         return status;
 336 }
 337
 338 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 339
 340 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 341                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 342                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 343 {
 344         krb5_error_code ret;
 345         const char *domain_filter = NULL;
 346         const char *result_filter = NULL;
 347         struct ldb_dn *name_dn = NULL;
 348
 349         struct smb_krb5_context *smb_krb5_context;
 350         ret = smb_krb5_init_context(mem_ctx,
 351                                     (struct event_context *)ldb_get_opaque(sam_ctx, "EventContext"),
 352                                     &smb_krb5_context);
 353
 354         if (ret) {
 355                 return WERR_NOMEM;
 356         }
 357
 358         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 359         info1->dns_domain_name = NULL;
 360         info1->result_name = NULL;
 361
 362         if (!name) {
 363                 return WERR_INVALID_PARAM;
 364         }
 365
 366         /* TODO: - fill the correct names in all cases!
 367          *       - handle format_flags
 368          */
 369
 370         /* here we need to set the domain_filter and/or the result_filter */
 371         switch (format_offered) {
 372         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 373         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 374         {
 375                 char *str, *s, *account;
 376
 377                 if (strlen(name) == 0) {
 378                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 379                         return WERR_OK;
 380                 }
 381
 382                 str = talloc_strdup(mem_ctx, name);
 383                 W_ERROR_HAVE_NO_MEMORY(str);
 384
 385                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 386                         /* Look backwards for the \n, and replace it with / */
 387                         s = strrchr(str, '\n');
 388                         if (!s) {
 389                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 390                                 return WERR_OK;
 391                         }
 392                         s[0] = '/';
 393                 }
 394
 395                 s = strchr(str, '/');
 396                 if (!s) {
 397                         /* there must be at least one / */
 398                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 399                         return WERR_OK;
 400                 }
 401
 402                 s[0] = '\0';
 403                 s++;
 404
 405                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))",
 406                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
 407                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 408
 409                 /* There may not be anything after the domain component (search for the domain itself) */
 410                 if (s[0]) {
 411
 412                         account = strrchr(s, '/');
 413                         if (!account) {
 414                                 account = s;
 415                         } else {
 416                                 account++;
 417                         }
 418                         account = ldb_binary_encode_string(mem_ctx, account);
 419                         W_ERROR_HAVE_NO_MEMORY(account);
 420                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 421                                                         account);
 422                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 423                 }
 424                 break;
 425         }
 426         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 427                 char *p;
 428                 char *domain;
 429                 const char *account = NULL;
 430
 431                 domain = talloc_strdup(mem_ctx, name);
 432                 W_ERROR_HAVE_NO_MEMORY(domain);
 433
 434                 p = strchr(domain, '\\');
 435                 if (!p) {
 436                         /* invalid input format */
 437                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 438                         return WERR_OK;
 439                 }
 440                 p[0] = '\0';
 441
 442                 if (p[1]) {
 443                         account = &p[1];
 444                 }
 445
 446                 domain_filter = talloc_asprintf(mem_ctx,
 447                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 448                                                 ldb_binary_encode_string(mem_ctx, domain));
 449                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 450                 if (account) {
 451                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 452                                                         ldb_binary_encode_string(mem_ctx, account));
 453                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 454                 }
 455
 456                 talloc_free(domain);
 457                 break;
 458         }
 459
 460                 /* A LDAP DN as a string */
 461         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 462                 domain_filter = NULL;
 463                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 464                 if (! ldb_dn_validate(name_dn)) {
 465                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 466                         return WERR_OK;
 467                 }
 468                 break;
 469         }
 470
 471                 /* A GUID as a string */
 472         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 473                 struct GUID guid;
 474                 char *ldap_guid;
 475                 NTSTATUS nt_status;
 476                 domain_filter = NULL;
 477
 478                 nt_status = GUID_from_string(name, &guid);
 479                 if (!NT_STATUS_IS_OK(nt_status)) {
 480                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 481                         return WERR_OK;
 482                 }
 483
 484                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 485                 if (!ldap_guid) {
 486                         return WERR_NOMEM;
 487                 }
 488                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 489                                                 ldap_guid);
 490                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 491                 break;
 492         }
 493         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 494                 domain_filter = NULL;
 495
 496                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 497                                                 ldb_binary_encode_string(mem_ctx, name),
 498                                                 ldb_binary_encode_string(mem_ctx, name));
 499                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 500                 break;
 501         }
 502
 503                 /* A S-1234-5678 style string */
 504         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 505                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 506                 char *ldap_sid;
 507
 508                 domain_filter = NULL;
 509                 if (!sid) {
 510                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 511                         return WERR_OK;
 512                 }
 513                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 514                                                    sid);
 515                 if (!ldap_sid) {
 516                         return WERR_NOMEM;
 517                 }
 518                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 519                                                 ldap_sid);
 520                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 521                 break;
 522         }
 523         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 524                 krb5_principal principal;
 525                 char *unparsed_name;
 526                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 527                 if (ret) {
 528                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 529                         return WERR_OK;
 530                 }
 531
 532                 domain_filter = NULL;
 533
 534                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 535                 if (ret) {
 536                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 537                         return WERR_NOMEM;
 538                 }
 539
 540                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 541                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 542                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 543
 544                 free(unparsed_name);
 545                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 546                 break;
 547         }
 548         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 549                 krb5_principal principal;
 550                 char *unparsed_name_short;
 551                 char *service;
 552                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 553                 if (ret == 0 && principal->name.name_string.len < 2) {
 554                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 555                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 556                         return WERR_OK;
 557                 }
 558                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 559                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 560                 if (ret) {
 561                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 562
 563                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 564                                                          name, info1);
 565                 }
 566
 567                 domain_filter = NULL;
 568
 569                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 570                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 571                 if (ret) {
 572                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 573                         return WERR_NOMEM;
 574                 }
 575
 576                 service = principal->name.name_string.val[0];
 577                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 578                         /* the 'cn' attribute is just the leading part of the name */
 579                         char *computer_name;
 580                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 581                                                       strcspn(principal->name.name_string.val[1], "."));
 582                         if (computer_name == NULL) {
 583                                 return WERR_NOMEM;
 584                         }
 585
 586                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 587                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 588                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 589                 } else {
 590                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 591                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 592                 }
 593                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 594                 free(unparsed_name_short);
 595                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 596
 597                 break;
 598         }
 599         default: {
 600                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 601                 return WERR_OK;
 602         }
 603
 604         }
 605
 606         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 607                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 608                                                  name_dn, name, info1);
 609         }
 610
 611         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 612                                     smb_krb5_context,
 613                                     format_flags, format_offered, format_desired,
 614                                     name_dn, name,
 615                                     domain_filter, result_filter,
 616                                     info1);
 617 }
 618
 619 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 620  * (FQDN_1779) into a canoical name without actually searching the
 621  * database */
 622
 623 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 624                                         uint32_t format_offered, uint32_t format_desired,
 625                                         struct ldb_dn *name_dn, const char *name,
 626                                         struct drsuapi_DsNameInfo1 *info1)
 627 {
 628         char *cracked;
 629         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 630                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 631                 return WERR_OK;
 632         }
 633
 634         switch (format_desired) {
 635         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 636                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 637                 break;
 638         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 639                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 640                 break;
 641         default:
 642                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 643                 return WERR_OK;
 644         }
 645         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 646         info1->result_name      = cracked;
 647         if (!cracked) {
 648                 return WERR_NOMEM;
 649         }
 650
 651         return WERR_OK;
 652 }
 653
 654 /* Given a filter for the domain, and one for the result, perform the
 655  * ldb search. The format offered and desired flags change the
 656  * behaviours, including what attributes to return.
 657  *
 658  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 659  */
 660
 661 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 662                                    struct smb_krb5_context *smb_krb5_context,
 663                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 664                                    struct ldb_dn *name_dn, const char *name,
 665                                    const char *domain_filter, const char *result_filter,
 666                                    struct drsuapi_DsNameInfo1 *info1)
 667 {
 668         int ldb_ret;
 669         struct ldb_message **domain_res = NULL;
 670         const char * const *domain_attrs;
 671         const char * const *result_attrs;
 672         struct ldb_message **result_res = NULL;
 673         struct ldb_message *result = NULL;
 674         struct ldb_dn *result_basedn = NULL;
 675         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 676         int i;
 677         char *p;
 678
 679         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 680         const char * const _result_attrs_null[] = { NULL };
 681
 682         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 683         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 684
 685         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 686         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 687
 688         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 689         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 690
 691         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 692         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 693
 694         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
 695         const char * const _result_attrs_none[] = { NULL};
 696
 697         /* here we need to set the attrs lists for domain and result lookups */
 698         switch (format_desired) {
 699         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 700         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 701                 domain_attrs = _domain_attrs_1779;
 702                 result_attrs = _result_attrs_null;
 703                 break;
 704         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 705                 domain_attrs = _domain_attrs_canonical;
 706                 result_attrs = _result_attrs_canonical;
 707                 break;
 708         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 709                 domain_attrs = _domain_attrs_nt4;
 710                 result_attrs = _result_attrs_nt4;
 711                 break;
 712         case DRSUAPI_DS_NAME_FORMAT_GUID:
 713                 domain_attrs = _domain_attrs_guid;
 714                 result_attrs = _result_attrs_guid;
 715                 break;
 716         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 717                 domain_attrs = _domain_attrs_display;
 718                 result_attrs = _result_attrs_display;
 719                 break;
 720         default:
 721                 domain_attrs = _domain_attrs_none;
 722                 result_attrs = _result_attrs_none;
 723                 break;
 724         }
 725
 726         if (domain_filter) {
 727                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 728                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 729                                        "%s", domain_filter);
 730                 switch (ldb_ret) {
 731                 case 1:
 732                         break;
 733                 case 0:
 734                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 735                         return WERR_OK;
 736                 case -1:
 737                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 738                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 739                         return WERR_OK;
 740                 default:
 741                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 742                         return WERR_OK;
 743                 }
 744
 745                 info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 746                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 747                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 748         } else {
 749                 info1->dns_domain_name  = NULL;
 750                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 751         }
 752
 753         if (result_filter) {
 754                 if (domain_res) {
 755                         result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 756
 757                         ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 758                                                result_attrs, "%s", result_filter);
 759                 } else {
 760                         /* search with the 'phantom root' flag */
 761                         struct ldb_request *req;
 762                         int ret;
 763                         struct ldb_result *res;
 764
 765                         res = talloc_zero(mem_ctx, struct ldb_result);
 766                         W_ERROR_HAVE_NO_MEMORY(res);
 767
 768                         ret = ldb_build_search_req(&req, sam_ctx, mem_ctx,
 769                                                    ldb_get_root_basedn(sam_ctx),
 770                                                    LDB_SCOPE_SUBTREE,
 771                                                    result_filter,
 772                                                    result_attrs,
 773                                                    NULL,
 774                                                    res,
 775                                                    ldb_search_default_callback);
 776                         if (ret == LDB_SUCCESS) {
 777                                 struct ldb_search_options_control *search_options;
 778                                 search_options = talloc(req, struct ldb_search_options_control);
 779                                 W_ERROR_HAVE_NO_MEMORY(search_options);
 780                                 search_options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
 781
 782                                 ret = ldb_request_add_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID, false, search_options);
 783                         }
 784                         if (ret != LDB_SUCCESS) {
 785                                 talloc_free(res);
 786                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 787                                 return WERR_OK;
 788                         }
 789
 790                         ldb_set_timeout(sam_ctx, req, 0); /* use default timeout */
 791
 792                         ret = ldb_request(sam_ctx, req);
 793
 794                         if (ret == LDB_SUCCESS) {
 795                                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 796                         }
 797
 798                         talloc_free(req);
 799
 800                         if (ret != LDB_SUCCESS) {
 801                                 DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s",
 802                                           ldb_errstring(sam_ctx)));
 803                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 804                                 return WERR_OK;
 805                         }
 806                         ldb_ret = res->count;
 807                         result_res = res->msgs;
 808                 }
 809         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 810                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 811                                           result_attrs);
 812         } else if (domain_res) {
 813                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 814                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 815                                           result_attrs);
 816         } else {
 817                 /* Can't happen */
 818                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not availible: This can't happen..."));
 819                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 820                 return WERR_OK;
 821         }
 822
 823         switch (ldb_ret) {
 824         case 1:
 825                 result = result_res[0];
 826                 break;
 827         case 0:
 828                 switch (format_offered) {
 829                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 830                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 831                                                    smb_krb5_context,
 832                                                    format_flags, format_offered, format_desired,
 833                                                    name, info1);
 834
 835                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 836                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 837                                               format_flags, format_offered, format_desired,
 838                                               name, info1);
 839                 }
 840                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 841                 return WERR_OK;
 842         case -1:
 843                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
 844                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 845                 return WERR_OK;
 846         default:
 847                 switch (format_offered) {
 848                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 849                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 850                 {
 851                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
 852                         /* We may need to manually filter further */
 853                         for (i = 0; i < ldb_ret; i++) {
 854                                 switch (format_offered) {
 855                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 856                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
 857                                         break;
 858                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 859                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
 860                                         break;
 861                                 }
 862                                 if (strcasecmp_m(canonical_name, name) == 0) {
 863                                         result = result_res[i];
 864                                         break;
 865                                 }
 866                         }
 867                         if (!result) {
 868                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 869                                 return WERR_OK;
 870                         }
 871                 }
 872                 default:
 873                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 874                         return WERR_OK;
 875                 }
 876         }
 877
 878         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
 879         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 880         p = strchr(info1->dns_domain_name, '/');
 881         if (p) {
 882                 p[0] = '\0';
 883         }
 884
 885         /* here we can use result and domain_res[0] */
 886         switch (format_desired) {
 887         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 888                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
 889                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 890
 891                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 892                 return WERR_OK;
 893         }
 894         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 895                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
 896                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 897                 return WERR_OK;
 898         }
 899         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 900                 /* Not in the virtual ldb attribute */
 901                 return DsCrackNameOneSyntactical(mem_ctx,
 902                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 903                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 904                                                  result->dn, name, info1);
 905         }
 906         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 907
 908                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
 909                 const char *_acc = "", *_dom = "";
 910
 911                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
 912                         ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 913                                                "(ncName=%s)", ldb_dn_get_linearized(result->dn));
 914                         if (ldb_ret != 1) {
 915                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 916                                 return WERR_OK;
 917                         }
 918                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 919                         W_ERROR_HAVE_NO_MEMORY(_dom);
 920                 } else {
 921                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
 922                         if (!_acc) {
 923                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 924                                 return WERR_OK;
 925                         }
 926                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
 927                                 _dom = "BUILTIN";
 928                         } else {
 929                                 const char *attrs[] = { NULL };
 930                                 struct ldb_message **domain_res2;
 931                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 932                                 if (!dom_sid) {
 933                                         return WERR_OK;
 934                                 }
 935                                 dom_sid->num_auths--;
 936                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 937                                                        "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 938                                 if (ldb_ret != 1) {
 939                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 940                                         return WERR_OK;
 941                                 }
 942                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res2, domain_attrs,
 943                                                        "(ncName=%s)", ldb_dn_get_linearized(domain_res[0]->dn));
 944                                 if (ldb_ret != 1) {
 945                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 946                                         return WERR_OK;
 947                                 }
 948
 949                                 _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 950                                 W_ERROR_HAVE_NO_MEMORY(_dom);
 951                         }
 952                 }
 953
 954                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 955                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 956
 957                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 958                 return WERR_OK;
 959         }
 960         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 961                 struct GUID guid;
 962
 963                 guid = samdb_result_guid(result, "objectGUID");
 964
 965                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 966                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 967
 968                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 969                 return WERR_OK;
 970         }
 971         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 972                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
 973                 if (!info1->result_name) {
 974                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
 975                 }
 976                 if (!info1->result_name) {
 977                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 978                 } else {
 979                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 980                 }
 981                 return WERR_OK;
 982         }
 983         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 984                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 985                 return WERR_OK;
 986         }
 987         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
 988         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 989                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 990                 return WERR_OK;
 991         }
 992         default:
 993                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 994                 return WERR_OK;
 995         }
 996 }
 997
 998 /* Given a user Principal Name (such as foo@bar.com),
 999  * return the user and domain DNs.  This is used in the KDC to then
1000  * return the Keys and evaluate policy */
1001
1002 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1003                                    TALLOC_CTX *mem_ctx,
1004                                    const char *user_principal_name,
1005                                    struct ldb_dn **user_dn,
1006                                    struct ldb_dn **domain_dn)
1007 {
1008         WERROR werr;
1009         struct drsuapi_DsNameInfo1 info1;
1010         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1011                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1012                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1013                                   user_principal_name,
1014                                   &info1);
1015         if (!W_ERROR_IS_OK(werr)) {
1016                 return werror_to_ntstatus(werr);
1017         }
1018         switch (info1.status) {
1019         case DRSUAPI_DS_NAME_STATUS_OK:
1020                 break;
1021         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1022         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1023         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1024                 return NT_STATUS_NO_SUCH_USER;
1025         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1026         default:
1027                 return NT_STATUS_UNSUCCESSFUL;
1028         }
1029
1030         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1031
1032         if (domain_dn) {
1033                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1034                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1035                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1036                                           talloc_asprintf(mem_ctx, "%s/",
1037                                                           info1.dns_domain_name),
1038                                           &info1);
1039                 if (!W_ERROR_IS_OK(werr)) {
1040                         return werror_to_ntstatus(werr);
1041                 }
1042                 switch (info1.status) {
1043                 case DRSUAPI_DS_NAME_STATUS_OK:
1044                         break;
1045                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1046                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1047                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1048                         return NT_STATUS_NO_SUCH_USER;
1049                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1050                 default:
1051                         return NT_STATUS_UNSUCCESSFUL;
1052                 }
1053
1054                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1055         }
1056
1057         return NT_STATUS_OK;
1058
1059 }
1060
1061 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1062  * return the user and domain DNs.  This is used in the KDC to then
1063  * return the Keys and evaluate policy */
1064
1065 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1066                                       TALLOC_CTX *mem_ctx,
1067                                       const char *service_principal_name,
1068                                       struct ldb_dn **user_dn,
1069                                       struct ldb_dn **domain_dn)
1070 {
1071         WERROR werr;
1072         struct drsuapi_DsNameInfo1 info1;
1073         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1074                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1075                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1076                                   service_principal_name,
1077                                   &info1);
1078         if (!W_ERROR_IS_OK(werr)) {
1079                 return werror_to_ntstatus(werr);
1080         }
1081         switch (info1.status) {
1082         case DRSUAPI_DS_NAME_STATUS_OK:
1083                 break;
1084         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1085         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1086         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1087                 return NT_STATUS_NO_SUCH_USER;
1088         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1089         default:
1090                 return NT_STATUS_UNSUCCESSFUL;
1091         }
1092
1093         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1094
1095         if (domain_dn) {
1096                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1097                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1098                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1099                                           talloc_asprintf(mem_ctx, "%s/",
1100                                                           info1.dns_domain_name),
1101                                           &info1);
1102                 if (!W_ERROR_IS_OK(werr)) {
1103                         return werror_to_ntstatus(werr);
1104                 }
1105                 switch (info1.status) {
1106                 case DRSUAPI_DS_NAME_STATUS_OK:
1107                         break;
1108                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1109                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1110                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1111                         return NT_STATUS_NO_SUCH_USER;
1112                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1113                 default:
1114                         return NT_STATUS_UNSUCCESSFUL;
1115                 }
1116
1117                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1118         }
1119
1120         return NT_STATUS_OK;
1121
1122 }
1123
1124 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1125                                 uint32_t format_offered,
1126                                 const char *name,
1127                                 const char **nt4_domain, const char **nt4_account)
1128 {
1129         WERROR werr;
1130         struct drsuapi_DsNameInfo1 info1;
1131         struct ldb_context *ldb;
1132         char *p;
1133
1134         /* Handle anonymous bind */
1135         if (!name || !*name) {
1136                 *nt4_domain = "";
1137                 *nt4_account = "";
1138                 return NT_STATUS_OK;
1139         }
1140
1141         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
1142         if (ldb == NULL) {
1143                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1144         }
1145
1146         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1147                                   format_offered,
1148                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1149                                   name,
1150                                   &info1);
1151         if (!W_ERROR_IS_OK(werr)) {
1152                 return werror_to_ntstatus(werr);
1153         }
1154         switch (info1.status) {
1155         case DRSUAPI_DS_NAME_STATUS_OK:
1156                 break;
1157         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1158         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1159         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1160                 return NT_STATUS_NO_SUCH_USER;
1161         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1162         default:
1163                 return NT_STATUS_UNSUCCESSFUL;
1164         }
1165
1166         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1167
1168         p = strchr(*nt4_domain, '\\');
1169         if (!p) {
1170                 return NT_STATUS_INVALID_PARAMETER;
1171         }
1172         p[0] = '\0';
1173
1174         if (p[1]) {
1175                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1176         }
1177
1178         if (!*nt4_account || !*nt4_domain) {
1179                 return NT_STATUS_NO_MEMORY;
1180         }
1181
1182         return NT_STATUS_OK;
1183 }
1184
1185 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1186                                      const char *name,
1187                                      const char **nt4_domain,
1188                                      const char **nt4_account)
1189 {
1190         uint32_t format_offered = DRSUAPI_DS_NAME_FORMAT_UKNOWN;
1191
1192         /* Handle anonymous bind */
1193         if (!name || !*name) {
1194                 *nt4_domain = "";
1195                 *nt4_account = "";
1196                 return NT_STATUS_OK;
1197         }
1198
1199         if (strchr_m(name, '=')) {
1200                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1201         } else if (strchr_m(name, '@')) {
1202                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1203         } else if (strchr_m(name, '\\')) {
1204                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1205         } else if (strchr_m(name, '/')) {
1206                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1207         }
1208
1209         return crack_name_to_nt4_name(mem_ctx, format_offered, name, nt4_domain, nt4_account);
1210 }