source/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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "librpc/gen_ndr/drsuapi.h"
  27 #include "rpc_server/common/common.h"
  28 #include "lib/ldb/include/ldb_errors.h"
  29 #include "system/kerberos.h"
  30 #include "auth/kerberos/kerberos.h"
  31 #include "libcli/ldap/ldap.h"
  32 #include "libcli/security/security.h"
  33 #include "librpc/gen_ndr/ndr_misc.h"
  34 #include "auth/auth.h"
  35 #include "db_wrap.h"
  36 #include "dsdb/samdb/samdb.h"
  37
  38 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  39                                    struct smb_krb5_context *smb_krb5_context,
  40                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
  41                                    struct ldb_dn *name_dn, const char *name,
  42                                    const char *domain_filter, const char *result_filter,
  43                                    struct drsuapi_DsNameInfo1 *info1);
  44 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  45                                         uint32_t format_offered, uint32_t format_desired,
  46                                         struct ldb_dn *name_dn, const char *name,
  47                                         struct drsuapi_DsNameInfo1 *info1);
  48
  49 static WERROR dns_domain_from_principal(struct smb_krb5_context *smb_krb5_context,
  50                                         const char *name,
  51                                         struct drsuapi_DsNameInfo1 *info1)
  52 {
  53         krb5_error_code ret;
  54         krb5_principal principal;
  55         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
  56         char **realm;
  57         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
  58                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
  59         if (ret) {
  60                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  61                 return WERR_OK;
  62         }
  63
  64         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
  65         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
  66
  67         info1->dns_domain_name  = talloc_strdup(info1, *realm);
  68         krb5_free_principal(smb_krb5_context->krb5_context, principal);
  69
  70         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
  71
  72         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
  73         return WERR_OK;
  74 }
  75
  76 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  77                                                       TALLOC_CTX *mem_ctx,
  78                                                       const char *alias_from,
  79                                                       char **alias_to)
  80 {
  81         int i;
  82         int ret;
  83         struct ldb_result *res;
  84         struct ldb_message_element *spnmappings;
  85         TALLOC_CTX *tmp_ctx;
  86         struct ldb_dn *service_dn;
  87         char *service_dn_str;
  88
  89         const char *directory_attrs[] = {
  90                 "sPNMappings",
  91                 NULL
  92         };
  93
  94         tmp_ctx = talloc_new(mem_ctx);
  95         if (!tmp_ctx) {
  96                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  97         }
  98
  99         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
 100         if ( ! ldb_dn_add_base(service_dn, samdb_config_dn(ldb_ctx))) {
 101                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 102         }
 103         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
 104         if ( ! service_dn_str) {
 105                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 106         }
 107
 108         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
 109                          directory_attrs, &res);
 110
 111         if (ret != LDB_SUCCESS) {
 112                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
 113                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 114         } else if (res->count != 1) {
 115                 talloc_free(res);
 116                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
 117                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 118         }
 119         talloc_steal(tmp_ctx, res);
 120
 121         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
 122         if (!spnmappings || spnmappings->num_values == 0) {
 123                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
 124                 talloc_free(tmp_ctx);
 125                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 126         }
 127
 128         for (i = 0; i < spnmappings->num_values; i++) {
 129                 char *mapping, *p, *str;
 130                 mapping = talloc_strdup(tmp_ctx,
 131                                         (const char *)spnmappings->values[i].data);
 132                 if (!mapping) {
 133                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 134                         talloc_free(tmp_ctx);
 135                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 136                 }
 137
 138                 /* C string manipulation sucks */
 139
 140                 p = strchr(mapping, '=');
 141                 if (!p) {
 142                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 143                                   service_dn_str, mapping));
 144                         talloc_free(tmp_ctx);
 145                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 146                 }
 147                 p[0] = '\0';
 148                 p++;
 149                 do {
 150                         str = p;
 151                         p = strchr(p, ',');
 152                         if (p) {
 153                                 p[0] = '\0';
 154                                 p++;
 155                         }
 156                         if (strcasecmp(str, alias_from) == 0) {
 157                                 *alias_to = mapping;
 158                                 talloc_steal(mem_ctx, mapping);
 159                                 talloc_free(tmp_ctx);
 160                                 return DRSUAPI_DS_NAME_STATUS_OK;
 161                         }
 162                 } while (p);
 163         }
 164         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 165         talloc_free(tmp_ctx);
 166         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 167 }
 168
 169 /* When cracking a ServicePrincipalName, many services may be served
 170  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 171  * but we translate it here, and search on host/.  This is done after
 172  * the cifs/ entry has been searched for, making this a fallback */
 173
 174 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 175                                   struct smb_krb5_context *smb_krb5_context,
 176                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 177                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 178 {
 179         WERROR wret;
 180         krb5_error_code ret;
 181         krb5_principal principal;
 182         const char *service, *dns_name;
 183         char *new_service;
 184         char *new_princ;
 185         enum drsuapi_DsNameStatus namestatus;
 186
 187         /* parse principal */
 188         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 189                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 190         if (ret) {
 191                 DEBUG(2, ("Could not parse principal: %s: %s",
 192                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 193                                                            ret, mem_ctx)));
 194                 return WERR_NOMEM;
 195         }
 196
 197         /* grab cifs/, http/ etc */
 198
 199         /* This is checked for in callers, but be safe */
 200         if (principal->name.name_string.len < 2) {
 201                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 202                 return WERR_OK;
 203         }
 204         service = principal->name.name_string.val[0];
 205         dns_name = principal->name.name_string.val[1];
 206
 207         /* MAP it */
 208         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 209                                           sam_ctx, mem_ctx,
 210                                           service, &new_service);
 211
 212         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
 213                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 214                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 215                 if (!info1->dns_domain_name) {
 216                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 217                         return WERR_NOMEM;
 218                 }
 219                 return WERR_OK;
 220         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 221                 info1->status = namestatus;
 222                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 223                 return WERR_OK;
 224         }
 225
 226         /* ooh, very nasty playing around in the Principal... */
 227         free(principal->name.name_string.val[0]);
 228         principal->name.name_string.val[0] = strdup(new_service);
 229         if (!principal->name.name_string.val[0]) {
 230                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 231                 return WERR_NOMEM;
 232         }
 233
 234         /* reform principal */
 235         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 236                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
 237
 238         if (ret) {
 239                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 240                 return WERR_NOMEM;
 241         }
 242
 243         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 244                                   new_princ, info1);
 245         free(new_princ);
 246         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
 247                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 248                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
 249                 if (!info1->dns_domain_name) {
 250                         wret = WERR_NOMEM;
 251                 }
 252         }
 253         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 254         return wret;
 255 }
 256
 257 /* Subcase of CrackNames, for the userPrincipalName */
 258
 259 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 260                              struct smb_krb5_context *smb_krb5_context,
 261                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 262                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 263 {
 264         int ldb_ret;
 265         WERROR status;
 266         const char *domain_filter = NULL;
 267         const char *result_filter = NULL;
 268         krb5_error_code ret;
 269         krb5_principal principal;
 270         char **realm;
 271         char *unparsed_name_short;
 272         const char *domain_attrs[] = { NULL };
 273         struct ldb_message **domain_res = NULL;
 274
 275         /* Prevent recursion */
 276         if (!name) {
 277                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 278                 return WERR_OK;
 279         }
 280
 281         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 282                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
 283         if (ret) {
 284                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 285                 return WERR_OK;
 286         }
 287
 288         domain_filter = NULL;
 289         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 290         domain_filter = talloc_asprintf(mem_ctx,
 291                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 292                                         ldb_binary_encode_string(mem_ctx, *realm),
 293                                         ldb_binary_encode_string(mem_ctx, *realm));
 294
 295         ldb_ret = gendb_search(sam_ctx, mem_ctx, samdb_partitions_dn(sam_ctx, mem_ctx),
 296                                &domain_res, domain_attrs,
 297                                "%s", domain_filter);
 298         switch (ldb_ret) {
 299         case 1:
 300                 break;
 301         case 0:
 302                 return dns_domain_from_principal(smb_krb5_context,
 303                                                  name, info1);
 304         case -1:
 305                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s", ldb_errstring(sam_ctx)));
 306                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 307                 return WERR_OK;
 308         default:
 309                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 310                 return WERR_OK;
 311         }
 312
 313         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 314                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 315         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 316
 317         if (ret) {
 318                 free(unparsed_name_short);
 319                 return WERR_NOMEM;
 320         }
 321
 322         /* This may need to be extended for more userPrincipalName variations */
 323         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 324                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 325         if (!result_filter || !domain_filter) {
 326                 free(unparsed_name_short);
 327                 return WERR_NOMEM;
 328         }
 329         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 330                                       smb_krb5_context,
 331                                       format_flags, format_offered, format_desired,
 332                                       NULL, unparsed_name_short, domain_filter, result_filter,
 333                                       info1);
 334         free(unparsed_name_short);
 335
 336         return status;
 337 }
 338
 339 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 340
 341 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 342                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 343                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 344 {
 345         krb5_error_code ret;
 346         const char *domain_filter = NULL;
 347         const char *result_filter = NULL;
 348         struct ldb_dn *name_dn = NULL;
 349
 350         struct smb_krb5_context *smb_krb5_context;
 351         ret = smb_krb5_init_context(mem_ctx,
 352                                     ldb_get_opaque(sam_ctx, "EventContext"),
 353                                     &smb_krb5_context);
 354
 355         if (ret) {
 356                 return WERR_NOMEM;
 357         }
 358
 359         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 360         info1->dns_domain_name = NULL;
 361         info1->result_name = NULL;
 362
 363         if (!name) {
 364                 return WERR_INVALID_PARAM;
 365         }
 366
 367         /* TODO: - fill the correct names in all cases!
 368          *       - handle format_flags
 369          */
 370
 371         /* here we need to set the domain_filter and/or the result_filter */
 372         switch (format_offered) {
 373         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 374         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 375         {
 376                 char *str, *s, *account;
 377
 378                 if (strlen(name) == 0) {
 379                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 380                         return WERR_OK;
 381                 }
 382
 383                 str = talloc_strdup(mem_ctx, name);
 384                 W_ERROR_HAVE_NO_MEMORY(str);
 385
 386                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 387                         /* Look backwards for the \n, and replace it with / */
 388                         s = strrchr(str, '\n');
 389                         if (!s) {
 390                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 391                                 return WERR_OK;
 392                         }
 393                         s[0] = '/';
 394                 }
 395
 396                 s = strchr(str, '/');
 397                 if (!s) {
 398                         /* there must be at least one / */
 399                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 400                         return WERR_OK;
 401                 }
 402
 403                 s[0] = '\0';
 404                 s++;
 405
 406                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))",
 407                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
 408                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 409
 410                 /* There may not be anything after the domain component (search for the domain itself) */
 411                 if (s[0]) {
 412
 413                         account = strrchr(s, '/');
 414                         if (!account) {
 415                                 account = s;
 416                         } else {
 417                                 account++;
 418                         }
 419                         account = ldb_binary_encode_string(mem_ctx, account);
 420                         W_ERROR_HAVE_NO_MEMORY(account);
 421                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 422                                                         account);
 423                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 424                 }
 425                 break;
 426         }
 427         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 428                 char *p;
 429                 char *domain;
 430                 const char *account = NULL;
 431
 432                 domain = talloc_strdup(mem_ctx, name);
 433                 W_ERROR_HAVE_NO_MEMORY(domain);
 434
 435                 p = strchr(domain, '\\');
 436                 if (!p) {
 437                         /* invalid input format */
 438                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 439                         return WERR_OK;
 440                 }
 441                 p[0] = '\0';
 442
 443                 if (p[1]) {
 444                         account = &p[1];
 445                 }
 446
 447                 domain_filter = talloc_asprintf(mem_ctx,
 448                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 449                                                 ldb_binary_encode_string(mem_ctx, domain));
 450                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 451                 if (account) {
 452                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 453                                                         ldb_binary_encode_string(mem_ctx, account));
 454                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 455                 }
 456
 457                 talloc_free(domain);
 458                 break;
 459         }
 460
 461                 /* A LDAP DN as a string */
 462         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 463                 domain_filter = NULL;
 464                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 465                 if (! ldb_dn_validate(name_dn)) {
 466                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 467                         return WERR_OK;
 468                 }
 469                 break;
 470         }
 471
 472                 /* A GUID as a string */
 473         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 474                 struct GUID guid;
 475                 char *ldap_guid;
 476                 NTSTATUS nt_status;
 477                 domain_filter = NULL;
 478
 479                 nt_status = GUID_from_string(name, &guid);
 480                 if (!NT_STATUS_IS_OK(nt_status)) {
 481                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 482                         return WERR_OK;
 483                 }
 484
 485                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 486                 if (!ldap_guid) {
 487                         return WERR_NOMEM;
 488                 }
 489                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 490                                                 ldap_guid);
 491                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 492                 break;
 493         }
 494         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 495                 domain_filter = NULL;
 496
 497                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 498                                                 ldb_binary_encode_string(mem_ctx, name),
 499                                                 ldb_binary_encode_string(mem_ctx, name));
 500                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 501                 break;
 502         }
 503
 504                 /* A S-1234-5678 style string */
 505         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 506                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 507                 char *ldap_sid;
 508
 509                 domain_filter = NULL;
 510                 if (!sid) {
 511                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 512                         return WERR_OK;
 513                 }
 514                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 515                                                    sid);
 516                 if (!ldap_sid) {
 517                         return WERR_NOMEM;
 518                 }
 519                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 520                                                 ldap_sid);
 521                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 522                 break;
 523         }
 524         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 525                 krb5_principal principal;
 526                 char *unparsed_name;
 527                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 528                 if (ret) {
 529                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 530                         return WERR_OK;
 531                 }
 532
 533                 domain_filter = NULL;
 534
 535                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 536                 if (ret) {
 537                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 538                         return WERR_NOMEM;
 539                 }
 540
 541                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 542                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 543                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 544
 545                 free(unparsed_name);
 546                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 547                 break;
 548         }
 549         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 550                 krb5_principal principal;
 551                 char *unparsed_name_short;
 552                 char *service;
 553                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 554                 if (ret == 0 && principal->name.name_string.len < 2) {
 555                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 556                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 557                         return WERR_OK;
 558                 }
 559                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 560                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 561                 if (ret) {
 562                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 563
 564                         return dns_domain_from_principal(smb_krb5_context,
 565                                                          name, info1);
 566                 }
 567
 568                 domain_filter = NULL;
 569
 570                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 571                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 572                 if (ret) {
 573                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 574                         return WERR_NOMEM;
 575                 }
 576
 577                 service = principal->name.name_string.val[0];
 578                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 579                         /* the 'cn' attribute is just the leading part of the name */
 580                         char *computer_name;
 581                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 582                                                       strcspn(principal->name.name_string.val[1], "."));
 583                         if (computer_name == NULL) {
 584                                 return WERR_NOMEM;
 585                         }
 586
 587                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 588                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 589                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 590                 } else {
 591                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 592                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 593                 }
 594                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 595                 free(unparsed_name_short);
 596                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 597
 598                 break;
 599         }
 600         default: {
 601                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 602                 return WERR_OK;
 603         }
 604
 605         }
 606
 607         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 608                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 609                                                  name_dn, name, info1);
 610         }
 611
 612         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 613                                     smb_krb5_context,
 614                                     format_flags, format_offered, format_desired,
 615                                     name_dn, name,
 616                                     domain_filter, result_filter,
 617                                     info1);
 618 }
 619
 620 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 621  * (FQDN_1779) into a canoical name without actually searching the
 622  * database */
 623
 624 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 625                                         uint32_t format_offered, uint32_t format_desired,
 626                                         struct ldb_dn *name_dn, const char *name,
 627                                         struct drsuapi_DsNameInfo1 *info1)
 628 {
 629         char *cracked;
 630         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 631                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 632                 return WERR_OK;
 633         }
 634
 635         switch (format_desired) {
 636         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 637                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 638                 break;
 639         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 640                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 641                 break;
 642         default:
 643                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 644                 return WERR_OK;
 645         }
 646         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 647         info1->result_name      = cracked;
 648         if (!cracked) {
 649                 return WERR_NOMEM;
 650         }
 651
 652         return WERR_OK;
 653 }
 654
 655 /* Given a filter for the domain, and one for the result, perform the
 656  * ldb search. The format offered and desired flags change the
 657  * behaviours, including what attributes to return.
 658  *
 659  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 660  */
 661
 662 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 663                                    struct smb_krb5_context *smb_krb5_context,
 664                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 665                                    struct ldb_dn *name_dn, const char *name,
 666                                    const char *domain_filter, const char *result_filter,
 667                                    struct drsuapi_DsNameInfo1 *info1)
 668 {
 669         int ldb_ret;
 670         struct ldb_message **domain_res = NULL;
 671         const char * const *domain_attrs;
 672         const char * const *result_attrs;
 673         struct ldb_message **result_res = NULL;
 674         struct ldb_message *result = NULL;
 675         struct ldb_dn *result_basedn = NULL;
 676         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 677         int i;
 678         char *p;
 679
 680         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 681         const char * const _result_attrs_null[] = { NULL };
 682
 683         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 684         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 685
 686         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 687         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 688
 689         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 690         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 691
 692         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 693         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 694
 695         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
 696         const char * const _result_attrs_none[] = { NULL};
 697
 698         /* here we need to set the attrs lists for domain and result lookups */
 699         switch (format_desired) {
 700         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 701         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 702                 domain_attrs = _domain_attrs_1779;
 703                 result_attrs = _result_attrs_null;
 704                 break;
 705         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 706                 domain_attrs = _domain_attrs_canonical;
 707                 result_attrs = _result_attrs_canonical;
 708                 break;
 709         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 710                 domain_attrs = _domain_attrs_nt4;
 711                 result_attrs = _result_attrs_nt4;
 712                 break;
 713         case DRSUAPI_DS_NAME_FORMAT_GUID:
 714                 domain_attrs = _domain_attrs_guid;
 715                 result_attrs = _result_attrs_guid;
 716                 break;
 717         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 718                 domain_attrs = _domain_attrs_display;
 719                 result_attrs = _result_attrs_display;
 720                 break;
 721         default:
 722                 domain_attrs = _domain_attrs_none;
 723                 result_attrs = _result_attrs_none;
 724                 break;
 725         }
 726
 727         if (domain_filter) {
 728                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 729                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 730                                        "%s", domain_filter);
 731                 switch (ldb_ret) {
 732                 case 1:
 733                         break;
 734                 case 0:
 735                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 736                         return WERR_OK;
 737                 case -1:
 738                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 739                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 740                         return WERR_OK;
 741                 default:
 742                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 743                         return WERR_OK;
 744                 }
 745
 746                 info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 747                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 748                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 749         } else {
 750                 info1->dns_domain_name  = NULL;
 751                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 752         }
 753
 754         if (result_filter) {
 755                 if (domain_res) {
 756                         result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 757
 758                         ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 759                                                result_attrs, "%s", result_filter);
 760                 } else {
 761                         /* search with the 'phantom root' flag */
 762                         struct ldb_request *req;
 763                         int ret;
 764                         struct ldb_result *res;
 765
 766                         res = talloc_zero(mem_ctx, struct ldb_result);
 767                         W_ERROR_HAVE_NO_MEMORY(res);
 768
 769                         ret = ldb_build_search_req(&req, sam_ctx, mem_ctx,
 770                                                    ldb_get_root_basedn(sam_ctx),
 771                                                    LDB_SCOPE_SUBTREE,
 772                                                    result_filter,
 773                                                    result_attrs,
 774                                                    NULL,
 775                                                    res,
 776                                                    ldb_search_default_callback);
 777                         if (ret == LDB_SUCCESS) {
 778                                 struct ldb_search_options_control *search_options;
 779                                 search_options = talloc(req, struct ldb_search_options_control);
 780                                 W_ERROR_HAVE_NO_MEMORY(search_options);
 781                                 search_options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
 782
 783                                 ret = ldb_request_add_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID, false, search_options);
 784                         }
 785                         if (ret != LDB_SUCCESS) {
 786                                 talloc_free(res);
 787                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 788                                 return WERR_OK;
 789                         }
 790
 791                         ldb_set_timeout(sam_ctx, req, 0); /* use default timeout */
 792
 793                         ret = ldb_request(sam_ctx, req);
 794
 795                         if (ret == LDB_SUCCESS) {
 796                                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 797                         }
 798
 799                         talloc_free(req);
 800
 801                         if (ret != LDB_SUCCESS) {
 802                                 DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s",
 803                                           ldb_errstring(sam_ctx)));
 804                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 805                                 return WERR_OK;
 806                         }
 807                         ldb_ret = res->count;
 808                         result_res = res->msgs;
 809                 }
 810         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 811                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 812                                           result_attrs);
 813         } else if (domain_res) {
 814                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 815                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 816                                           result_attrs);
 817         } else {
 818                 /* Can't happen */
 819                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not availible: This can't happen..."));
 820                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 821                 return WERR_OK;
 822         }
 823
 824         switch (ldb_ret) {
 825         case 1:
 826                 result = result_res[0];
 827                 break;
 828         case 0:
 829                 switch (format_offered) {
 830                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 831                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 832                                                    smb_krb5_context,
 833                                                    format_flags, format_offered, format_desired,
 834                                                    name, info1);
 835
 836                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 837                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 838                                               format_flags, format_offered, format_desired,
 839                                               name, info1);
 840                 }
 841                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 842                 return WERR_OK;
 843         case -1:
 844                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
 845                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 846                 return WERR_OK;
 847         default:
 848                 switch (format_offered) {
 849                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 850                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 851                 {
 852                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
 853                         /* We may need to manually filter further */
 854                         for (i = 0; i < ldb_ret; i++) {
 855                                 switch (format_offered) {
 856                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 857                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
 858                                         break;
 859                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 860                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
 861                                         break;
 862                                 }
 863                                 if (strcasecmp_m(canonical_name, name) == 0) {
 864                                         result = result_res[i];
 865                                         break;
 866                                 }
 867                         }
 868                         if (!result) {
 869                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 870                                 return WERR_OK;
 871                         }
 872                 }
 873                 default:
 874                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 875                         return WERR_OK;
 876                 }
 877         }
 878
 879         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
 880         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 881         p = strchr(info1->dns_domain_name, '/');
 882         if (p) {
 883                 p[0] = '\0';
 884         }
 885
 886         /* here we can use result and domain_res[0] */
 887         switch (format_desired) {
 888         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 889                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
 890                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 891
 892                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 893                 return WERR_OK;
 894         }
 895         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 896                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
 897                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 898                 return WERR_OK;
 899         }
 900         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 901                 /* Not in the virtual ldb attribute */
 902                 return DsCrackNameOneSyntactical(mem_ctx,
 903                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 904                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 905                                                  result->dn, name, info1);
 906         }
 907         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 908
 909                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
 910                 const char *_acc = "", *_dom = "";
 911
 912                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
 913                         ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 914                                                "(ncName=%s)", ldb_dn_get_linearized(result->dn));
 915                         if (ldb_ret != 1) {
 916                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 917                                 return WERR_OK;
 918                         }
 919                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 920                         W_ERROR_HAVE_NO_MEMORY(_dom);
 921                 } else {
 922                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
 923                         if (!_acc) {
 924                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 925                                 return WERR_OK;
 926                         }
 927                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
 928                                 _dom = "BUILTIN";
 929                         } else {
 930                                 const char *attrs[] = { NULL };
 931                                 struct ldb_message **domain_res2;
 932                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 933                                 if (!dom_sid) {
 934                                         return WERR_OK;
 935                                 }
 936                                 dom_sid->num_auths--;
 937                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 938                                                        "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 939                                 if (ldb_ret != 1) {
 940                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 941                                         return WERR_OK;
 942                                 }
 943                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res2, domain_attrs,
 944                                                        "(ncName=%s)", ldb_dn_get_linearized(domain_res[0]->dn));
 945                                 if (ldb_ret != 1) {
 946                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 947                                         return WERR_OK;
 948                                 }
 949
 950                                 _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 951                                 W_ERROR_HAVE_NO_MEMORY(_dom);
 952                         }
 953                 }
 954
 955                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 956                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 957
 958                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 959                 return WERR_OK;
 960         }
 961         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 962                 struct GUID guid;
 963
 964                 guid = samdb_result_guid(result, "objectGUID");
 965
 966                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 967                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 968
 969                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 970                 return WERR_OK;
 971         }
 972         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 973                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
 974                 if (!info1->result_name) {
 975                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
 976                 }
 977                 if (!info1->result_name) {
 978                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 979                 } else {
 980                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 981                 }
 982                 return WERR_OK;
 983         }
 984         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 985                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 986                 return WERR_OK;
 987         }
 988         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN:
 989         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 990                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 991                 return WERR_OK;
 992         }
 993         default:
 994                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 995                 return WERR_OK;
 996         }
 997 }
 998
 999 /* Given a user Principal Name (such as foo@bar.com),
1000  * return the user and domain DNs.  This is used in the KDC to then
1001  * return the Keys and evaluate policy */
1002
1003 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
1004                                    TALLOC_CTX *mem_ctx,
1005                                    const char *user_principal_name,
1006                                    struct ldb_dn **user_dn,
1007                                    struct ldb_dn **domain_dn)
1008 {
1009         WERROR werr;
1010         struct drsuapi_DsNameInfo1 info1;
1011         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1012                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1013                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1014                                   user_principal_name,
1015                                   &info1);
1016         if (!W_ERROR_IS_OK(werr)) {
1017                 return werror_to_ntstatus(werr);
1018         }
1019         switch (info1.status) {
1020         case DRSUAPI_DS_NAME_STATUS_OK:
1021                 break;
1022         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1023         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1024         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1025                 return NT_STATUS_NO_SUCH_USER;
1026         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1027         default:
1028                 return NT_STATUS_UNSUCCESSFUL;
1029         }
1030
1031         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1032
1033         if (domain_dn) {
1034                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1035                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1036                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1037                                           talloc_asprintf(mem_ctx, "%s/",
1038                                                           info1.dns_domain_name),
1039                                           &info1);
1040                 if (!W_ERROR_IS_OK(werr)) {
1041                         return werror_to_ntstatus(werr);
1042                 }
1043                 switch (info1.status) {
1044                 case DRSUAPI_DS_NAME_STATUS_OK:
1045                         break;
1046                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1047                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1048                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1049                         return NT_STATUS_NO_SUCH_USER;
1050                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1051                 default:
1052                         return NT_STATUS_UNSUCCESSFUL;
1053                 }
1054
1055                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1056         }
1057
1058         return NT_STATUS_OK;
1059
1060 }
1061
1062 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1063  * return the user and domain DNs.  This is used in the KDC to then
1064  * return the Keys and evaluate policy */
1065
1066 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
1067                                       TALLOC_CTX *mem_ctx,
1068                                       const char *service_principal_name,
1069                                       struct ldb_dn **user_dn,
1070                                       struct ldb_dn **domain_dn)
1071 {
1072         WERROR werr;
1073         struct drsuapi_DsNameInfo1 info1;
1074         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1075                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1076                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1077                                   service_principal_name,
1078                                   &info1);
1079         if (!W_ERROR_IS_OK(werr)) {
1080                 return werror_to_ntstatus(werr);
1081         }
1082         switch (info1.status) {
1083         case DRSUAPI_DS_NAME_STATUS_OK:
1084                 break;
1085         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1086         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1087         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1088                 return NT_STATUS_NO_SUCH_USER;
1089         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1090         default:
1091                 return NT_STATUS_UNSUCCESSFUL;
1092         }
1093
1094         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1095
1096         if (domain_dn) {
1097                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1098                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1099                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1100                                           talloc_asprintf(mem_ctx, "%s/",
1101                                                           info1.dns_domain_name),
1102                                           &info1);
1103                 if (!W_ERROR_IS_OK(werr)) {
1104                         return werror_to_ntstatus(werr);
1105                 }
1106                 switch (info1.status) {
1107                 case DRSUAPI_DS_NAME_STATUS_OK:
1108                         break;
1109                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1110                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1111                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1112                         return NT_STATUS_NO_SUCH_USER;
1113                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1114                 default:
1115                         return NT_STATUS_UNSUCCESSFUL;
1116                 }
1117
1118                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1119         }
1120
1121         return NT_STATUS_OK;
1122
1123 }
1124
1125 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1126                                 uint32_t format_offered,
1127                                 const char *name,
1128                                 const char **nt4_domain, const char **nt4_account)
1129 {
1130         WERROR werr;
1131         struct drsuapi_DsNameInfo1 info1;
1132         struct ldb_context *ldb;
1133         char *p;
1134
1135         /* Handle anonymous bind */
1136         if (!name || !*name) {
1137                 *nt4_domain = "";
1138                 *nt4_account = "";
1139                 return NT_STATUS_OK;
1140         }
1141
1142         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
1143         if (ldb == NULL) {
1144                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1145         }
1146
1147         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1148                                   format_offered,
1149                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1150                                   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         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1168
1169         p = strchr(*nt4_domain, '\\');
1170         if (!p) {
1171                 return NT_STATUS_INVALID_PARAMETER;
1172         }
1173         p[0] = '\0';
1174
1175         if (p[1]) {
1176                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1177         }
1178
1179         if (!*nt4_account || !*nt4_domain) {
1180                 return NT_STATUS_NO_MEMORY;
1181         }
1182
1183         return NT_STATUS_OK;
1184 }
1185
1186 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1187                                      const char *name,
1188                                      const char **nt4_domain,
1189                                      const char **nt4_account)
1190 {
1191         uint32_t format_offered = DRSUAPI_DS_NAME_FORMAT_UKNOWN;
1192
1193         /* Handle anonymous bind */
1194         if (!name || !*name) {
1195                 *nt4_domain = "";
1196                 *nt4_account = "";
1197                 return NT_STATUS_OK;
1198         }
1199
1200         if (strchr_m(name, '=')) {
1201                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1202         } else if (strchr_m(name, '@')) {
1203                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1204         } else if (strchr_m(name, '\\')) {
1205                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1206         } else if (strchr_m(name, '/')) {
1207                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1208         }
1209
1210         return crack_name_to_nt4_name(mem_ctx, format_offered, name, nt4_domain, nt4_account);
1211 }