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 "param/param.h"
  38
  39 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  40                                    struct smb_krb5_context *smb_krb5_context,
  41                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
  42                                    struct ldb_dn *name_dn, const char *name,
  43                                    const char *domain_filter, const char *result_filter,
  44                                    struct drsuapi_DsNameInfo1 *info1);
  45 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  46                                         uint32_t format_offered, uint32_t format_desired,
  47                                         struct ldb_dn *name_dn, const char *name,
  48                                         struct drsuapi_DsNameInfo1 *info1);
  49
  50 static WERROR dns_domain_from_principal(TALLOC_CTX *mem_ctx, struct smb_krb5_context *smb_krb5_context,
  51                                         const char *name,
  52                                         struct drsuapi_DsNameInfo1 *info1)
  53 {
  54         krb5_error_code ret;
  55         krb5_principal principal;
  56         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
  57         const char *realm;
  58         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
  59                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
  60         if (ret) {
  61                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  62                 return WERR_OK;
  63         }
  64
  65         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
  66         realm = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
  67
  68         info1->dns_domain_name  = talloc_strdup(mem_ctx, realm);
  69         krb5_free_principal(smb_krb5_context->krb5_context, principal);
  70
  71         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
  72
  73         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
  74         return WERR_OK;
  75 }
  76
  77 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  78                                                       TALLOC_CTX *mem_ctx,
  79                                                       const char *alias_from,
  80                                                       char **alias_to)
  81 {
  82         int i;
  83         int ret;
  84         struct ldb_result *res;
  85         struct ldb_message_element *spnmappings;
  86         TALLOC_CTX *tmp_ctx;
  87         struct ldb_dn *service_dn;
  88         char *service_dn_str;
  89
  90         const char *directory_attrs[] = {
  91                 "sPNMappings",
  92                 NULL
  93         };
  94
  95         tmp_ctx = talloc_new(mem_ctx);
  96         if (!tmp_ctx) {
  97                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  98         }
  99
 100         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
 101         if ( ! ldb_dn_add_base(service_dn, samdb_config_dn(ldb_ctx))) {
 102                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 103         }
 104         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
 105         if ( ! service_dn_str) {
 106                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 107         }
 108
 109         ret = ldb_search(ldb_ctx, tmp_ctx, &res, service_dn, LDB_SCOPE_BASE,
 110                          directory_attrs, "(objectClass=nTDSService)");
 111
 112         if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) {
 113                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
 114                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 115         } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 116                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
 117                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 118         } else if (res->count != 1) {
 119                 talloc_free(res);
 120                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
 121                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 122         }
 123
 124         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
 125         if (!spnmappings || spnmappings->num_values == 0) {
 126                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
 127                 talloc_free(tmp_ctx);
 128                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 129         }
 130
 131         for (i = 0; i < spnmappings->num_values; i++) {
 132                 char *mapping, *p, *str;
 133                 mapping = talloc_strdup(tmp_ctx,
 134                                         (const char *)spnmappings->values[i].data);
 135                 if (!mapping) {
 136                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 137                         talloc_free(tmp_ctx);
 138                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 139                 }
 140
 141                 /* C string manipulation sucks */
 142
 143                 p = strchr(mapping, '=');
 144                 if (!p) {
 145                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 146                                   service_dn_str, mapping));
 147                         talloc_free(tmp_ctx);
 148                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 149                 }
 150                 p[0] = '\0';
 151                 p++;
 152                 do {
 153                         str = p;
 154                         p = strchr(p, ',');
 155                         if (p) {
 156                                 p[0] = '\0';
 157                                 p++;
 158                         }
 159                         if (strcasecmp(str, alias_from) == 0) {
 160                                 *alias_to = mapping;
 161                                 talloc_steal(mem_ctx, mapping);
 162                                 talloc_free(tmp_ctx);
 163                                 return DRSUAPI_DS_NAME_STATUS_OK;
 164                         }
 165                 } while (p);
 166         }
 167         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 168         talloc_free(tmp_ctx);
 169         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 170 }
 171
 172 /* When cracking a ServicePrincipalName, many services may be served
 173  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 174  * but we translate it here, and search on host/.  This is done after
 175  * the cifs/ entry has been searched for, making this a fallback */
 176
 177 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 178                                   struct smb_krb5_context *smb_krb5_context,
 179                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 180                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 181 {
 182         WERROR wret;
 183         krb5_error_code ret;
 184         krb5_principal principal;
 185         const char *service, *dns_name;
 186         char *new_service;
 187         char *new_princ;
 188         enum drsuapi_DsNameStatus namestatus;
 189
 190         /* parse principal */
 191         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 192                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 193         if (ret) {
 194                 DEBUG(2, ("Could not parse principal: %s: %s",
 195                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 196                                                            ret, mem_ctx)));
 197                 return WERR_NOMEM;
 198         }
 199
 200         /* grab cifs/, http/ etc */
 201
 202         /* This is checked for in callers, but be safe */
 203         if (principal->name.name_string.len < 2) {
 204                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 205                 return WERR_OK;
 206         }
 207         service = principal->name.name_string.val[0];
 208         dns_name = principal->name.name_string.val[1];
 209
 210         /* MAP it */
 211         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 212                                           sam_ctx, mem_ctx,
 213                                           service, &new_service);
 214
 215         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 216                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 217                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 218                 if (!info1->dns_domain_name) {
 219                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 220                         return WERR_NOMEM;
 221                 }
 222                 return WERR_OK;
 223         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 224                 info1->status = namestatus;
 225                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 226                 return WERR_OK;
 227         }
 228
 229         /* ooh, very nasty playing around in the Principal... */
 230         free(principal->name.name_string.val[0]);
 231         principal->name.name_string.val[0] = strdup(new_service);
 232         if (!principal->name.name_string.val[0]) {
 233                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 234                 return WERR_NOMEM;
 235         }
 236
 237         /* reform principal */
 238         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 239                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
 240
 241         if (ret) {
 242                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 243                 return WERR_NOMEM;
 244         }
 245
 246         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 247                                   new_princ, info1);
 248         free(new_princ);
 249         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
 250                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 251                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 252                 if (!info1->dns_domain_name) {
 253                         wret = WERR_NOMEM;
 254                 }
 255         }
 256         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 257         return wret;
 258 }
 259
 260 /* Subcase of CrackNames, for the userPrincipalName */
 261
 262 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 263                              struct smb_krb5_context *smb_krb5_context,
 264                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 265                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 266 {
 267         int ldb_ret;
 268         WERROR status;
 269         const char *domain_filter = NULL;
 270         const char *result_filter = NULL;
 271         krb5_error_code ret;
 272         krb5_principal principal;
 273         const char *realm;
 274         char *unparsed_name_short;
 275         const char *domain_attrs[] = { NULL };
 276         struct ldb_result *domain_res = NULL;
 277
 278         /* Prevent recursion */
 279         if (!name) {
 280                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 281                 return WERR_OK;
 282         }
 283
 284         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 285                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
 286         if (ret) {
 287                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 288                 return WERR_OK;
 289         }
 290
 291         realm = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
 292
 293         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 294                                      samdb_partitions_dn(sam_ctx, mem_ctx),
 295                                      LDB_SCOPE_ONELEVEL,
 296                                      domain_attrs,
 297                                      "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 298                                      ldb_binary_encode_string(mem_ctx, realm),
 299                                      ldb_binary_encode_string(mem_ctx, realm));
 300
 301         if (ldb_ret != LDB_SUCCESS) {
 302                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s", ldb_errstring(sam_ctx)));
 303                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 304                 return WERR_OK;
 305         }
 306
 307         switch (domain_res->count) {
 308         case 1:
 309                 break;
 310         case 0:
 311                 return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 312                                                  name, info1);
 313         default:
 314                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 315                 return WERR_OK;
 316         }
 317
 318         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 319                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 320         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 321
 322         if (ret) {
 323                 free(unparsed_name_short);
 324                 return WERR_NOMEM;
 325         }
 326
 327         /* This may need to be extended for more userPrincipalName variations */
 328         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 329                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 330
 331         domain_filter = talloc_asprintf(mem_ctx, "(distinguishedName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
 332
 333         if (!result_filter || !domain_filter) {
 334                 free(unparsed_name_short);
 335                 return WERR_NOMEM;
 336         }
 337         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 338                                       smb_krb5_context,
 339                                       format_flags, format_offered, format_desired,
 340                                       NULL, unparsed_name_short, domain_filter, result_filter,
 341                                       info1);
 342         free(unparsed_name_short);
 343
 344         return status;
 345 }
 346
 347 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 348
 349 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 350                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 351                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 352 {
 353         krb5_error_code ret;
 354         const char *domain_filter = NULL;
 355         const char *result_filter = NULL;
 356         struct ldb_dn *name_dn = NULL;
 357
 358         struct smb_krb5_context *smb_krb5_context = NULL;
 359
 360         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 361         info1->dns_domain_name = NULL;
 362         info1->result_name = NULL;
 363
 364         if (!name) {
 365                 return WERR_INVALID_PARAM;
 366         }
 367
 368         /* TODO: - fill the correct names in all cases!
 369          *       - handle format_flags
 370          */
 371
 372         /* here we need to set the domain_filter and/or the result_filter */
 373         switch (format_offered) {
 374         case DRSUAPI_DS_NAME_FORMAT_UNKNOWN:
 375         {
 376                 int i;
 377                 enum drsuapi_DsNameFormat formats[] = {
 378                         DRSUAPI_DS_NAME_FORMAT_FQDN_1779, DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 379                         DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT, DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 380                         DRSUAPI_DS_NAME_FORMAT_GUID, DRSUAPI_DS_NAME_FORMAT_DISPLAY,
 381                         DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 382                         DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY,
 383                         DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX
 384                 };
 385                 WERROR werr;
 386                 for (i=0; i < ARRAY_SIZE(formats); i++) {
 387                         werr = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, formats[i], format_desired, name, info1);
 388                         if (!W_ERROR_IS_OK(werr)) {
 389                                 return werr;
 390                         }
 391                         if (info1->status != DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 392                                 return werr;
 393                         }
 394                 }
 395                 return werr;
 396         }
 397
 398         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 399         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 400         {
 401                 char *str, *s, *account;
 402
 403                 if (strlen(name) == 0) {
 404                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 405                         return WERR_OK;
 406                 }
 407
 408                 str = talloc_strdup(mem_ctx, name);
 409                 W_ERROR_HAVE_NO_MEMORY(str);
 410
 411                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 412                         /* Look backwards for the \n, and replace it with / */
 413                         s = strrchr(str, '\n');
 414                         if (!s) {
 415                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 416                                 return WERR_OK;
 417                         }
 418                         s[0] = '/';
 419                 }
 420
 421                 s = strchr(str, '/');
 422                 if (!s) {
 423                         /* there must be at least one / */
 424                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 425                         return WERR_OK;
 426                 }
 427
 428                 s[0] = '\0';
 429                 s++;
 430
 431                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))",
 432                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
 433                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 434
 435                 /* There may not be anything after the domain component (search for the domain itself) */
 436                 if (s[0]) {
 437
 438                         account = strrchr(s, '/');
 439                         if (!account) {
 440                                 account = s;
 441                         } else {
 442                                 account++;
 443                         }
 444                         account = ldb_binary_encode_string(mem_ctx, account);
 445                         W_ERROR_HAVE_NO_MEMORY(account);
 446                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 447                                                         account);
 448                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 449                 }
 450                 break;
 451         }
 452         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 453                 char *p;
 454                 char *domain;
 455                 const char *account = NULL;
 456
 457                 domain = talloc_strdup(mem_ctx, name);
 458                 W_ERROR_HAVE_NO_MEMORY(domain);
 459
 460                 p = strchr(domain, '\\');
 461                 if (!p) {
 462                         /* invalid input format */
 463                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 464                         return WERR_OK;
 465                 }
 466                 p[0] = '\0';
 467
 468                 if (p[1]) {
 469                         account = &p[1];
 470                 }
 471
 472                 domain_filter = talloc_asprintf(mem_ctx,
 473                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 474                                                 ldb_binary_encode_string(mem_ctx, domain));
 475                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 476                 if (account) {
 477                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 478                                                         ldb_binary_encode_string(mem_ctx, account));
 479                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 480                 }
 481
 482                 talloc_free(domain);
 483                 break;
 484         }
 485
 486                 /* A LDAP DN as a string */
 487         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 488                 domain_filter = NULL;
 489                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 490                 if (! ldb_dn_validate(name_dn)) {
 491                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 492                         return WERR_OK;
 493                 }
 494                 break;
 495         }
 496
 497                 /* A GUID as a string */
 498         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 499                 struct GUID guid;
 500                 char *ldap_guid;
 501                 NTSTATUS nt_status;
 502                 domain_filter = NULL;
 503
 504                 nt_status = GUID_from_string(name, &guid);
 505                 if (!NT_STATUS_IS_OK(nt_status)) {
 506                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 507                         return WERR_OK;
 508                 }
 509
 510                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 511                 if (!ldap_guid) {
 512                         return WERR_NOMEM;
 513                 }
 514                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 515                                                 ldap_guid);
 516                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 517                 break;
 518         }
 519         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 520                 domain_filter = NULL;
 521
 522                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 523                                                 ldb_binary_encode_string(mem_ctx, name),
 524                                                 ldb_binary_encode_string(mem_ctx, name));
 525                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 526                 break;
 527         }
 528
 529                 /* A S-1234-5678 style string */
 530         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 531                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 532                 char *ldap_sid;
 533
 534                 domain_filter = NULL;
 535                 if (!sid) {
 536                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 537                         return WERR_OK;
 538                 }
 539                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 540                                                    sid);
 541                 if (!ldap_sid) {
 542                         return WERR_NOMEM;
 543                 }
 544                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 545                                                 ldap_sid);
 546                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 547                 break;
 548         }
 549         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 550                 krb5_principal principal;
 551                 char *unparsed_name;
 552
 553                 ret = smb_krb5_init_context(mem_ctx,
 554                                             ldb_get_event_context(sam_ctx),
 555                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 556                                             &smb_krb5_context);
 557
 558                 if (ret) {
 559                         return WERR_NOMEM;
 560                 }
 561
 562                 /* Ensure we reject compleate junk first */
 563                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 564                 if (ret) {
 565                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 566                         return WERR_OK;
 567                 }
 568
 569                 domain_filter = NULL;
 570
 571                 /* By getting the unparsed name here, we ensure the escaping is correct (and trust the client less) */
 572                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 573                 if (ret) {
 574                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 575                         return WERR_NOMEM;
 576                 }
 577
 578                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 579
 580                 /* The ldb_binary_encode_string() here avoid LDAP filter injection attacks */
 581                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 582                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 583
 584                 free(unparsed_name);
 585                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 586                 break;
 587         }
 588         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 589                 krb5_principal principal;
 590                 char *unparsed_name_short;
 591                 char *service;
 592
 593                 ret = smb_krb5_init_context(mem_ctx,
 594                                             ldb_get_event_context(sam_ctx),
 595                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"),
 596                                             &smb_krb5_context);
 597
 598                 if (ret) {
 599                         return WERR_NOMEM;
 600                 }
 601
 602                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 603                 if (ret == 0 && principal->name.name_string.len < 2) {
 604                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 605                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 606                         return WERR_OK;
 607                 }
 608                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 609                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 610                 if (ret) {
 611                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 612
 613                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
 614                                                          name, info1);
 615                 }
 616
 617                 domain_filter = NULL;
 618
 619                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 620                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 621                 if (ret) {
 622                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 623                         return WERR_NOMEM;
 624                 }
 625
 626                 service = principal->name.name_string.val[0];
 627                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 628                         /* the 'cn' attribute is just the leading part of the name */
 629                         char *computer_name;
 630                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 631                                                       strcspn(principal->name.name_string.val[1], "."));
 632                         if (computer_name == NULL) {
 633                                 return WERR_NOMEM;
 634                         }
 635
 636                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 637                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 638                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 639                 } else {
 640                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 641                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 642                 }
 643                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 644                 free(unparsed_name_short);
 645                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 646
 647                 break;
 648         }
 649         default: {
 650                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 651                 return WERR_OK;
 652         }
 653
 654         }
 655
 656         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 657                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 658                                                  name_dn, name, info1);
 659         }
 660
 661         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 662                                     smb_krb5_context,
 663                                     format_flags, format_offered, format_desired,
 664                                     name_dn, name,
 665                                     domain_filter, result_filter,
 666                                     info1);
 667 }
 668
 669 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 670  * (FQDN_1779) into a canoical name without actually searching the
 671  * database */
 672
 673 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 674                                         uint32_t format_offered, uint32_t format_desired,
 675                                         struct ldb_dn *name_dn, const char *name,
 676                                         struct drsuapi_DsNameInfo1 *info1)
 677 {
 678         char *cracked;
 679         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 680                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 681                 return WERR_OK;
 682         }
 683
 684         switch (format_desired) {
 685         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 686                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 687                 break;
 688         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 689                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 690                 break;
 691         default:
 692                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 693                 return WERR_OK;
 694         }
 695         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 696         info1->result_name      = cracked;
 697         if (!cracked) {
 698                 return WERR_NOMEM;
 699         }
 700
 701         return WERR_OK;
 702 }
 703
 704 /* Given a filter for the domain, and one for the result, perform the
 705  * ldb search. The format offered and desired flags change the
 706  * behaviours, including what attributes to return.
 707  *
 708  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 709  */
 710
 711 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 712                                    struct smb_krb5_context *smb_krb5_context,
 713                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 714                                    struct ldb_dn *name_dn, const char *name,
 715                                    const char *domain_filter, const char *result_filter,
 716                                    struct drsuapi_DsNameInfo1 *info1)
 717 {
 718         int ldb_ret;
 719         struct ldb_result *domain_res = NULL;
 720         const char * const *domain_attrs;
 721         const char * const *result_attrs;
 722         struct ldb_message **result_res = NULL;
 723         struct ldb_message *result = NULL;
 724         struct ldb_dn *result_basedn = 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                 if (domain_res) {
 813                         result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 814
 815                         ret = ldb_search(sam_ctx, mem_ctx, &res,
 816                                                  result_basedn, LDB_SCOPE_SUBTREE,
 817                                                  result_attrs, "%s", result_filter);
 818                         if (ret != LDB_SUCCESS) {
 819                                 talloc_free(result_res);
 820                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 821                                 return WERR_OK;
 822                         }
 823                         ldb_ret = res->count;
 824                         result_res = res->msgs;
 825                 } else {
 826                         /* search with the 'phantom root' flag */
 827                         struct ldb_request *req;
 828
 829                         res = talloc_zero(mem_ctx, struct ldb_result);
 830                         W_ERROR_HAVE_NO_MEMORY(res);
 831
 832                         ret = ldb_build_search_req(&req, sam_ctx, mem_ctx,
 833                                                    ldb_get_root_basedn(sam_ctx),
 834                                                    LDB_SCOPE_SUBTREE,
 835                                                    result_filter,
 836                                                    result_attrs,
 837                                                    NULL,
 838                                                    res,
 839                                                    ldb_search_default_callback,
 840                                                    NULL);
 841                         if (ret == LDB_SUCCESS) {
 842                                 struct ldb_search_options_control *search_options;
 843                                 search_options = talloc(req, struct ldb_search_options_control);
 844                                 W_ERROR_HAVE_NO_MEMORY(search_options);
 845                                 search_options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
 846
 847                                 ret = ldb_request_add_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID, false, search_options);
 848                         }
 849                         if (ret != LDB_SUCCESS) {
 850                                 talloc_free(res);
 851                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 852                                 return WERR_OK;
 853                         }
 854
 855                         ret = ldb_request(sam_ctx, req);
 856
 857                         if (ret == LDB_SUCCESS) {
 858                                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 859                         }
 860
 861                         talloc_free(req);
 862
 863                         if (ret != LDB_SUCCESS) {
 864                                 DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s",
 865                                           ldb_errstring(sam_ctx)));
 866                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 867                                 return WERR_OK;
 868                         }
 869                         ldb_ret = res->count;
 870                         result_res = res->msgs;
 871                 }
 872         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 873                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 874                                           result_attrs);
 875         } else if (domain_res) {
 876                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
 877                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 878                                           result_attrs);
 879         } else {
 880                 /* Can't happen */
 881                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not availible: This can't happen..."));
 882                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 883                 return WERR_OK;
 884         }
 885
 886         switch (ldb_ret) {
 887         case 1:
 888                 result = result_res[0];
 889                 break;
 890         case 0:
 891                 switch (format_offered) {
 892                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 893                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 894                                                    smb_krb5_context,
 895                                                    format_flags, format_offered, format_desired,
 896                                                    name, info1);
 897
 898                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 899                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 900                                               format_flags, format_offered, format_desired,
 901                                               name, info1);
 902                 }
 903                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 904                 return WERR_OK;
 905         case -1:
 906                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
 907                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 908                 return WERR_OK;
 909         default:
 910                 switch (format_offered) {
 911                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 912                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 913                 {
 914                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
 915                         /* We may need to manually filter further */
 916                         for (i = 0; i < ldb_ret; i++) {
 917                                 switch (format_offered) {
 918                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 919                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
 920                                         break;
 921                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 922                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
 923                                         break;
 924                                 }
 925                                 if (strcasecmp_m(canonical_name, name) == 0) {
 926                                         result = result_res[i];
 927                                         break;
 928                                 }
 929                         }
 930                         if (!result) {
 931                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 932                                 return WERR_OK;
 933                         }
 934                 }
 935                 default:
 936                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 937                         return WERR_OK;
 938                 }
 939         }
 940
 941         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
 942         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 943         p = strchr(info1->dns_domain_name, '/');
 944         if (p) {
 945                 p[0] = '\0';
 946         }
 947
 948         /* here we can use result and domain_res[0] */
 949         switch (format_desired) {
 950         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 951                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
 952                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 953
 954                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 955                 return WERR_OK;
 956         }
 957         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 958                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
 959                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 960                 return WERR_OK;
 961         }
 962         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 963                 /* Not in the virtual ldb attribute */
 964                 return DsCrackNameOneSyntactical(mem_ctx,
 965                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 966                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 967                                                  result->dn, name, info1);
 968         }
 969         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 970
 971                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
 972                 const char *_acc = "", *_dom = "";
 973
 974                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
 975
 976                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
 977                                                      partitions_basedn,
 978                                                      LDB_SCOPE_ONELEVEL,
 979                                                      domain_attrs,
 980                                                      "(ncName=%s)", ldb_dn_get_linearized(result->dn));
 981
 982                         if (ldb_ret != LDB_SUCCESS) {
 983                                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 984                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 985                                 return WERR_OK;
 986                         }
 987
 988                         switch (domain_res->count) {
 989                         case 1:
 990                                 break;
 991                         case 0:
 992                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 993                                 return WERR_OK;
 994                         default:
 995                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 996                                 return WERR_OK;
 997                         }
 998                         _dom = samdb_result_string(domain_res->msgs[0], "nETBIOSName", NULL);
 999                         W_ERROR_HAVE_NO_MEMORY(_dom);
1000                 } else {
1001                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
1002                         if (!_acc) {
1003                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1004                                 return WERR_OK;
1005                         }
1006                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
1007                                 _dom = "BUILTIN";
1008                         } else {
1009                                 const char *attrs[] = { NULL };
1010                                 struct ldb_result *domain_res2;
1011                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
1012                                 if (!dom_sid) {
1013                                         return WERR_OK;
1014                                 }
1015                                 dom_sid->num_auths--;
1016                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1017                                                              NULL,
1018                                                              LDB_SCOPE_BASE,
1019                                                              attrs,
1020                                                              "(&(objectSid=%s)(objectClass=domain))",
1021                                                              ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
1022
1023                                 if (ldb_ret != LDB_SUCCESS) {
1024                                         DEBUG(2, ("DsCrackNameOneFilter domain search failed: %s", ldb_errstring(sam_ctx)));
1025                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1026                                         return WERR_OK;
1027                                 }
1028
1029                                 switch (domain_res->count) {
1030                                 case 1:
1031                                         break;
1032                                 case 0:
1033                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1034                                         return WERR_OK;
1035                                 default:
1036                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1037                                         return WERR_OK;
1038                                 }
1039
1040                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res2,
1041                                                              partitions_basedn,
1042                                                              LDB_SCOPE_ONELEVEL,
1043                                                              domain_attrs,
1044                                                              "(ncName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
1045
1046                                 if (ldb_ret != LDB_SUCCESS) {
1047                                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
1048                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1049                                         return WERR_OK;
1050                                 }
1051
1052                                 switch (domain_res2->count) {
1053                                 case 1:
1054                                         break;
1055                                 case 0:
1056                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1057                                         return WERR_OK;
1058                                 default:
1059                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1060                                         return WERR_OK;
1061                                 }
1062                                 _dom = samdb_result_string(domain_res2->msgs[0], "nETBIOSName", NULL);
1063                                 W_ERROR_HAVE_NO_MEMORY(_dom);
1064                         }
1065                 }
1066
1067                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
1068                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1069
1070                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1071                 return WERR_OK;
1072         }
1073         case DRSUAPI_DS_NAME_FORMAT_GUID: {
1074                 struct GUID guid;
1075
1076                 guid = samdb_result_guid(result, "objectGUID");
1077
1078                 info1->result_name      = GUID_string2(mem_ctx, &guid);
1079                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1080
1081                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1082                 return WERR_OK;
1083         }
1084         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
1085                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
1086                 if (!info1->result_name) {
1087                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
1088                 }
1089                 if (!info1->result_name) {
1090                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1091                 } else {
1092                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
1093                 }
1094                 return WERR_OK;
1095         }
1096         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
1097                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1098                 return WERR_OK;
1099         }
1100         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
1101         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
1102                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1103                 return WERR_OK;
1104         }
1105         default:
1106                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1107                 return WERR_OK;
1108         }
1109 }
1110
1111 /* Given a user Principal Name (such as foo@bar.com),
1112  * return the user and domain DNs.  This is used in the KDC to then
1113  * return the Keys and evaluate policy */
1114
1115 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1116                                    TALLOC_CTX *mem_ctx,
1117                                    const char *user_principal_name,
1118                                    struct ldb_dn **user_dn,
1119                                    struct ldb_dn **domain_dn)
1120 {
1121         WERROR werr;
1122         struct drsuapi_DsNameInfo1 info1;
1123         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1124                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1125                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1126                                   user_principal_name,
1127                                   &info1);
1128         if (!W_ERROR_IS_OK(werr)) {
1129                 return werror_to_ntstatus(werr);
1130         }
1131         switch (info1.status) {
1132         case DRSUAPI_DS_NAME_STATUS_OK:
1133                 break;
1134         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1135         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1136         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1137                 return NT_STATUS_NO_SUCH_USER;
1138         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1139         default:
1140                 return NT_STATUS_UNSUCCESSFUL;
1141         }
1142
1143         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1144
1145         if (domain_dn) {
1146                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1147                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1148                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1149                                           talloc_asprintf(mem_ctx, "%s/",
1150                                                           info1.dns_domain_name),
1151                                           &info1);
1152                 if (!W_ERROR_IS_OK(werr)) {
1153                         return werror_to_ntstatus(werr);
1154                 }
1155                 switch (info1.status) {
1156                 case DRSUAPI_DS_NAME_STATUS_OK:
1157                         break;
1158                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1159                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1160                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1161                         return NT_STATUS_NO_SUCH_USER;
1162                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1163                 default:
1164                         return NT_STATUS_UNSUCCESSFUL;
1165                 }
1166
1167                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1168         }
1169
1170         return NT_STATUS_OK;
1171 }
1172
1173 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1174  * return the user and domain DNs.  This is used in the KDC to then
1175  * return the Keys and evaluate policy */
1176
1177 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1178                                       TALLOC_CTX *mem_ctx,
1179                                       const char *service_principal_name,
1180                                       struct ldb_dn **user_dn,
1181                                       struct ldb_dn **domain_dn)
1182 {
1183         WERROR werr;
1184         struct drsuapi_DsNameInfo1 info1;
1185         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1186                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1187                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1188                                   service_principal_name,
1189                                   &info1);
1190         if (!W_ERROR_IS_OK(werr)) {
1191                 return werror_to_ntstatus(werr);
1192         }
1193         switch (info1.status) {
1194         case DRSUAPI_DS_NAME_STATUS_OK:
1195                 break;
1196         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1197         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1198         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1199                 return NT_STATUS_NO_SUCH_USER;
1200         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1201         default:
1202                 return NT_STATUS_UNSUCCESSFUL;
1203         }
1204
1205         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1206
1207         if (domain_dn) {
1208                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1209                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1210                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1211                                           talloc_asprintf(mem_ctx, "%s/",
1212                                                           info1.dns_domain_name),
1213                                           &info1);
1214                 if (!W_ERROR_IS_OK(werr)) {
1215                         return werror_to_ntstatus(werr);
1216                 }
1217                 switch (info1.status) {
1218                 case DRSUAPI_DS_NAME_STATUS_OK:
1219                         break;
1220                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1221                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1222                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1223                         return NT_STATUS_NO_SUCH_USER;
1224                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1225                 default:
1226                         return NT_STATUS_UNSUCCESSFUL;
1227                 }
1228
1229                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1230         }
1231
1232         return NT_STATUS_OK;
1233 }
1234
1235 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1236                                 struct tevent_context *ev_ctx,
1237                                 struct loadparm_context *lp_ctx,
1238                                 uint32_t format_offered,
1239                                 const char *name,
1240                                 const char **nt4_domain, const char **nt4_account)
1241 {
1242         WERROR werr;
1243         struct drsuapi_DsNameInfo1 info1;
1244         struct ldb_context *ldb;
1245         char *p;
1246
1247         /* Handle anonymous bind */
1248         if (!name || !*name) {
1249                 *nt4_domain = "";
1250                 *nt4_account = "";
1251                 return NT_STATUS_OK;
1252         }
1253
1254         ldb = samdb_connect(mem_ctx, ev_ctx, lp_ctx, system_session(mem_ctx, lp_ctx));
1255         if (ldb == NULL) {
1256                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1257         }
1258
1259         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1260                                   format_offered,
1261                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1262                                   name,
1263                                   &info1);
1264         if (!W_ERROR_IS_OK(werr)) {
1265                 return werror_to_ntstatus(werr);
1266         }
1267         switch (info1.status) {
1268         case DRSUAPI_DS_NAME_STATUS_OK:
1269                 break;
1270         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1271         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1272         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1273                 return NT_STATUS_NO_SUCH_USER;
1274         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1275         default:
1276                 return NT_STATUS_UNSUCCESSFUL;
1277         }
1278
1279         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1280         if (*nt4_domain == NULL) {
1281                 return NT_STATUS_NO_MEMORY;
1282         }
1283
1284         p = strchr(*nt4_domain, '\\');
1285         if (!p) {
1286                 return NT_STATUS_INVALID_PARAMETER;
1287         }
1288         p[0] = '\0';
1289
1290         *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1291         if (*nt4_account == NULL) {
1292                 return NT_STATUS_NO_MEMORY;
1293         }
1294
1295         return NT_STATUS_OK;
1296 }
1297
1298 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1299                                      struct tevent_context *ev_ctx,
1300                                      struct loadparm_context *lp_ctx,
1301                                      const char *name,
1302                                      const char **nt4_domain,
1303                                      const char **nt4_account)
1304 {
1305         uint32_t format_offered = DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
1306
1307         /* Handle anonymous bind */
1308         if (!name || !*name) {
1309                 *nt4_domain = "";
1310                 *nt4_account = "";
1311                 return NT_STATUS_OK;
1312         }
1313
1314         if (strchr_m(name, '=')) {
1315                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1316         } else if (strchr_m(name, '@')) {
1317                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1318         } else if (strchr_m(name, '\\')) {
1319                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1320         } else if (strchr_m(name, '/')) {
1321                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1322         } else {
1323                 return NT_STATUS_NO_SUCH_USER;
1324         }
1325
1326         return crack_name_to_nt4_name(mem_ctx, ev_ctx, lp_ctx, format_offered, name, nt4_domain, nt4_account);
1327 }