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 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 enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  50                                                       TALLOC_CTX *mem_ctx,
  51                                                       const char *alias_from,
  52                                                       char **alias_to)
  53 {
  54         int i;
  55         int ret;
  56         struct ldb_result *res;
  57         struct ldb_message_element *spnmappings;
  58         TALLOC_CTX *tmp_ctx;
  59         struct ldb_dn *service_dn;
  60         char *service_dn_str;
  61
  62         const char *directory_attrs[] = {
  63                 "sPNMappings",
  64                 NULL
  65         };
  66
  67         tmp_ctx = talloc_new(mem_ctx);
  68         if (!tmp_ctx) {
  69                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  70         }
  71
  72         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services,CN=Configuration");
  73         if ( ! ldb_dn_add_base(service_dn, samdb_base_dn(ldb_ctx))) {
  74                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  75         }
  76         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
  77         if ( ! service_dn_str) {
  78                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  79         }
  80
  81         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
  82                          directory_attrs, &res);
  83
  84         if (ret != LDB_SUCCESS) {
  85                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
  86                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  87         } else if (res->count != 1) {
  88                 talloc_free(res);
  89                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
  90                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  91         }
  92         talloc_steal(tmp_ctx, res);
  93
  94         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
  95         if (!spnmappings || spnmappings->num_values == 0) {
  96                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
  97                 talloc_free(tmp_ctx);
  98                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  99         }
 100
 101         for (i = 0; i < spnmappings->num_values; i++) {
 102                 char *mapping, *p, *str;
 103                 mapping = talloc_strdup(tmp_ctx,
 104                                         (const char *)spnmappings->values[i].data);
 105                 if (!mapping) {
 106                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 107                         talloc_free(tmp_ctx);
 108                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 109                 }
 110
 111                 /* C string manipulation sucks */
 112
 113                 p = strchr(mapping, '=');
 114                 if (!p) {
 115                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 116                                   service_dn_str, mapping));
 117                         talloc_free(tmp_ctx);
 118                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 119                 }
 120                 p[0] = '\0';
 121                 p++;
 122                 do {
 123                         str = p;
 124                         p = strchr(p, ',');
 125                         if (p) {
 126                                 p[0] = '\0';
 127                                 p++;
 128                         }
 129                         if (strcasecmp(str, alias_from) == 0) {
 130                                 *alias_to = mapping;
 131                                 talloc_steal(mem_ctx, mapping);
 132                                 talloc_free(tmp_ctx);
 133                                 return DRSUAPI_DS_NAME_STATUS_OK;
 134                         }
 135                 } while (p);
 136         }
 137         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 138         talloc_free(tmp_ctx);
 139         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 140 }
 141
 142 /* When cracking a ServicePrincipalName, many services may be served
 143  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 144  * but we translate it here, and search on host/.  This is done after
 145  * the cifs/ entry has been searched for, making this a fallback */
 146
 147 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 148                                   struct smb_krb5_context *smb_krb5_context,
 149                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 150                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 151 {
 152         WERROR wret;
 153         krb5_error_code ret;
 154         krb5_principal principal;
 155         const char *service;
 156         char *new_service;
 157         char *new_princ;
 158         enum drsuapi_DsNameStatus namestatus;
 159
 160         /* parse principal */
 161         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context,
 162                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 163         if (ret) {
 164                 DEBUG(2, ("Could not parse principal: %s: %s",
 165                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 166                                                            ret, mem_ctx)));
 167                 return WERR_NOMEM;
 168         }
 169
 170         /* grab cifs/, http/ etc */
 171
 172         /* This is checked for in callers, but be safe */
 173         if (principal->name.name_string.len < 2) {
 174                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 175                 return WERR_OK;
 176         }
 177         service = principal->name.name_string.val[0];
 178
 179         /* MAP it */
 180         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 181                                           sam_ctx, mem_ctx,
 182                                           service, &new_service);
 183
 184         if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 185                 info1->status = namestatus;
 186                 return WERR_OK;
 187         }
 188
 189         if (ret != 0) {
 190                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 191                 return WERR_OK;
 192         }
 193
 194         /* ooh, very nasty playing around in the Principal... */
 195         free(principal->name.name_string.val[0]);
 196         principal->name.name_string.val[0] = strdup(new_service);
 197         if (!principal->name.name_string.val[0]) {
 198                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 199                 return WERR_NOMEM;
 200         }
 201
 202         /* reform principal */
 203         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 204                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
 205
 206         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 207
 208         if (ret) {
 209                 return WERR_NOMEM;
 210         }
 211
 212         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 213                                   new_princ, info1);
 214         free(new_princ);
 215         return wret;
 216 }
 217
 218 /* Subcase of CrackNames, for the userPrincipalName */
 219
 220 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 221                              struct smb_krb5_context *smb_krb5_context,
 222                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 223                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 224 {
 225         WERROR status;
 226         const char *domain_filter = NULL;
 227         const char *result_filter = NULL;
 228         krb5_error_code ret;
 229         krb5_principal principal;
 230         char **realm;
 231         char *unparsed_name_short;
 232
 233         /* Prevent recursion */
 234         if (!name) {
 235                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 236                 return WERR_OK;
 237         }
 238
 239         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 240                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
 241         if (ret) {
 242                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 243                 return WERR_OK;
 244         }
 245
 246         domain_filter = NULL;
 247         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 248         domain_filter = talloc_asprintf(mem_ctx,
 249                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 250                                         ldb_binary_encode_string(mem_ctx, *realm),
 251                                         ldb_binary_encode_string(mem_ctx, *realm));
 252         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 253                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 254         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 255
 256         if (ret) {
 257                 free(unparsed_name_short);
 258                 return WERR_NOMEM;
 259         }
 260
 261         /* This may need to be extended for more userPrincipalName variations */
 262         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 263                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 264         if (!result_filter || !domain_filter) {
 265                 free(unparsed_name_short);
 266                 return WERR_NOMEM;
 267         }
 268         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 269                                       smb_krb5_context,
 270                                       format_flags, format_offered, format_desired,
 271                                       NULL, unparsed_name_short, domain_filter, result_filter,
 272                                       info1);
 273         free(unparsed_name_short);
 274         return status;
 275 }
 276
 277 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 278
 279 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 280                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 281                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 282 {
 283         krb5_error_code ret;
 284         const char *domain_filter = NULL;
 285         const char *result_filter = NULL;
 286         struct ldb_dn *name_dn = NULL;
 287
 288         struct smb_krb5_context *smb_krb5_context;
 289         ret = smb_krb5_init_context(mem_ctx, &smb_krb5_context);
 290
 291         if (ret) {
 292                 return WERR_NOMEM;
 293         }
 294
 295         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 296         info1->dns_domain_name = NULL;
 297         info1->result_name = NULL;
 298
 299         if (!name) {
 300                 return WERR_INVALID_PARAM;
 301         }
 302
 303         /* TODO: - fill the correct names in all cases!
 304          *       - handle format_flags
 305          */
 306
 307         /* here we need to set the domain_filter and/or the result_filter */
 308         switch (format_offered) {
 309         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 310         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 311         {
 312                 char *str, *s, *account;
 313
 314                 if (strlen(name) == 0) {
 315                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 316                         return WERR_OK;
 317                 }
 318
 319                 str = talloc_strdup(mem_ctx, name);
 320                 W_ERROR_HAVE_NO_MEMORY(str);
 321
 322                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
 323                         /* Look backwards for the \n, and replace it with / */
 324                         s = strrchr(str, '\n');
 325                         if (!s) {
 326                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 327                                 return WERR_OK;
 328                         }
 329                         s[0] = '/';
 330                 }
 331
 332                 s = strchr(str, '/');
 333                 if (!s) {
 334                         /* there must be at least one / */
 335                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 336                         return WERR_OK;
 337                 }
 338
 339                 s[0] = '\0';
 340                 s++;
 341
 342                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))",
 343                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
 344                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 345
 346                 /* There may not be anything after the domain component (search for the domain itself) */
 347                 if (s[0]) {
 348
 349                         account = strrchr(s, '/');
 350                         if (!account) {
 351                                 account = s;
 352                         } else {
 353                                 account++;
 354                         }
 355                         account = ldb_binary_encode_string(mem_ctx, account);
 356                         W_ERROR_HAVE_NO_MEMORY(account);
 357                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
 358                                                         account);
 359                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 360                 }
 361                 break;
 362         }
 363         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 364                 char *p;
 365                 char *domain;
 366                 const char *account = NULL;
 367
 368                 domain = talloc_strdup(mem_ctx, name);
 369                 W_ERROR_HAVE_NO_MEMORY(domain);
 370
 371                 p = strchr(domain, '\\');
 372                 if (!p) {
 373                         /* invalid input format */
 374                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 375                         return WERR_OK;
 376                 }
 377                 p[0] = '\0';
 378
 379                 if (p[1]) {
 380                         account = &p[1];
 381                 }
 382
 383                 domain_filter = talloc_asprintf(mem_ctx,
 384                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 385                                                 ldb_binary_encode_string(mem_ctx, domain));
 386                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 387                 if (account) {
 388                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 389                                                         ldb_binary_encode_string(mem_ctx, account));
 390                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 391                 }
 392
 393                 talloc_free(domain);
 394                 break;
 395         }
 396
 397                 /* A LDAP DN as a string */
 398         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 399                 domain_filter = NULL;
 400                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 401                 if (! ldb_dn_validate(name_dn)) {
 402                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 403                         return WERR_OK;
 404                 }
 405                 break;
 406         }
 407
 408                 /* A GUID as a string */
 409         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 410                 struct GUID guid;
 411                 char *ldap_guid;
 412                 NTSTATUS nt_status;
 413                 domain_filter = NULL;
 414
 415                 nt_status = GUID_from_string(name, &guid);
 416                 if (!NT_STATUS_IS_OK(nt_status)) {
 417                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 418                         return WERR_OK;
 419                 }
 420
 421                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 422                 if (!ldap_guid) {
 423                         return WERR_NOMEM;
 424                 }
 425                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 426                                                 ldap_guid);
 427                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 428                 break;
 429         }
 430         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 431                 domain_filter = NULL;
 432
 433                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 434                                                 ldb_binary_encode_string(mem_ctx, name),
 435                                                 ldb_binary_encode_string(mem_ctx, name));
 436                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 437                 break;
 438         }
 439
 440                 /* A S-1234-5678 style string */
 441         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 442                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 443                 char *ldap_sid;
 444
 445                 domain_filter = NULL;
 446                 if (!sid) {
 447                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 448                         return WERR_OK;
 449                 }
 450                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 451                                                    sid);
 452                 if (!ldap_sid) {
 453                         return WERR_NOMEM;
 454                 }
 455                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 456                                                 ldap_sid);
 457                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 458                 break;
 459         }
 460         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 461                 krb5_principal principal;
 462                 char *unparsed_name;
 463                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 464                 if (ret) {
 465                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 466                         return WERR_OK;
 467                 }
 468
 469                 domain_filter = NULL;
 470
 471                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 472                 if (ret) {
 473                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 474                         return WERR_NOMEM;
 475                 }
 476
 477                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 478                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 479                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 480
 481                 free(unparsed_name);
 482                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 483                 break;
 484         }
 485         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 486                 krb5_principal principal;
 487                 char *unparsed_name_short;
 488                 char *service;
 489                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 490                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 491                 if (ret) {
 492                         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
 493                         char **realm;
 494                         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 495                                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
 496                         if (ret) {
 497                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 498                                 return WERR_OK;
 499                         }
 500
 501                         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
 502                         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 503
 504                         info1->dns_domain_name  = talloc_strdup(info1, *realm);
 505                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 506
 507                         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 508
 509                         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 510                         return WERR_OK;
 511
 512                 } else if (principal->name.name_string.len < 2) {
 513                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 514                         return WERR_OK;
 515                 }
 516
 517                 domain_filter = NULL;
 518
 519                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 520                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 521                 if (ret) {
 522                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 523                         return WERR_NOMEM;
 524                 }
 525
 526                 service = principal->name.name_string.val[0];
 527                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 528                         /* the 'cn' attribute is just the leading part of the name */
 529                         char *computer_name;
 530                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 531                                                       strcspn(principal->name.name_string.val[1], "."));
 532                         if (computer_name == NULL) {
 533                                 return WERR_NOMEM;
 534                         }
 535
 536                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 537                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 538                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 539                 } else {
 540                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 541                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 542                 }
 543                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 544                 free(unparsed_name_short);
 545                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 546
 547                 break;
 548         }
 549         default: {
 550                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 551                 return WERR_OK;
 552         }
 553
 554         }
 555
 556         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 557                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 558                                                  name_dn, name, info1);
 559         }
 560
 561         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 562                                     smb_krb5_context,
 563                                     format_flags, format_offered, format_desired,
 564                                     name_dn, name,
 565                                     domain_filter, result_filter,
 566                                     info1);
 567 }
 568
 569 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 570  * (FQDN_1779) into a canoical name without actually searching the
 571  * database */
 572
 573 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 574                                         uint32_t format_offered, uint32_t format_desired,
 575                                         struct ldb_dn *name_dn, const char *name,
 576                                         struct drsuapi_DsNameInfo1 *info1)
 577 {
 578         char *cracked;
 579         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 580                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 581                 return WERR_OK;
 582         }
 583
 584         switch (format_desired) {
 585         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 586                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 587                 break;
 588         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 589                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 590                 break;
 591         default:
 592                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 593                 return WERR_OK;
 594         }
 595         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 596         info1->result_name      = cracked;
 597         if (!cracked) {
 598                 return WERR_NOMEM;
 599         }
 600
 601         return WERR_OK;
 602 }
 603
 604 /* Given a filter for the domain, and one for the result, perform the
 605  * ldb search. The format offered and desired flags change the
 606  * behaviours, including what attributes to return.
 607  *
 608  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 609  */
 610
 611 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 612                                    struct smb_krb5_context *smb_krb5_context,
 613                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 614                                    struct ldb_dn *name_dn, const char *name,
 615                                    const char *domain_filter, const char *result_filter,
 616                                    struct drsuapi_DsNameInfo1 *info1)
 617 {
 618         int ldb_ret;
 619         struct ldb_message **domain_res = NULL;
 620         const char * const *domain_attrs;
 621         const char * const *result_attrs;
 622         struct ldb_message **result_res = NULL;
 623         struct ldb_message *result = NULL;
 624         struct ldb_dn *result_basedn;
 625         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 626         int i;
 627
 628         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 629         const char * const _result_attrs_null[] = { NULL };
 630
 631         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 632         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 633
 634         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 635         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
 636
 637         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 638         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 639
 640         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 641         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 642
 643         /* here we need to set the attrs lists for domain and result lookups */
 644         switch (format_desired) {
 645         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 646         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 647                 domain_attrs = _domain_attrs_1779;
 648                 result_attrs = _result_attrs_null;
 649                 break;
 650         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 651                 domain_attrs = _domain_attrs_canonical;
 652                 result_attrs = _result_attrs_canonical;
 653                 break;
 654         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 655                 domain_attrs = _domain_attrs_nt4;
 656                 result_attrs = _result_attrs_nt4;
 657                 break;
 658         case DRSUAPI_DS_NAME_FORMAT_GUID:
 659                 domain_attrs = _domain_attrs_guid;
 660                 result_attrs = _result_attrs_guid;
 661                 break;
 662         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 663                 domain_attrs = _domain_attrs_display;
 664                 result_attrs = _result_attrs_display;
 665                 break;
 666         default:
 667                 return WERR_OK;
 668         }
 669
 670         if (domain_filter) {
 671                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 672                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 673                                        "%s", domain_filter);
 674         } else {
 675                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 676                                        "(ncName=%s)", ldb_dn_get_linearized(samdb_base_dn(sam_ctx)));
 677         }
 678
 679         switch (ldb_ret) {
 680         case 1:
 681                 break;
 682         case 0:
 683                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 684                 return WERR_OK;
 685         case -1:
 686                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
 687                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 688                 return WERR_OK;
 689         default:
 690                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 691                 return WERR_OK;
 692         }
 693
 694         info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 695         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 696         info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 697
 698         if (result_filter) {
 699                 result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 700
 701                 ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 702                                        result_attrs, "%s", result_filter);
 703         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 704                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 705                                           result_attrs);
 706         } else {
 707                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 708                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 709                                           result_attrs);
 710         }
 711
 712         switch (ldb_ret) {
 713         case 1:
 714                 result = result_res[0];
 715                 break;
 716         case 0:
 717                 switch (format_offered) {
 718                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 719                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 720                                                    smb_krb5_context,
 721                                                    format_flags, format_offered, format_desired,
 722                                                    name, info1);
 723
 724                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 725                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 726                                               format_flags, format_offered, format_desired,
 727                                               name, info1);
 728                 }
 729                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 730                 return WERR_OK;
 731         case -1:
 732                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
 733                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 734                 return WERR_OK;
 735         default:
 736                 switch (format_offered) {
 737                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 738                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 739                 {
 740                         const char *canonical_name;
 741                         /* We may need to manually filter further */
 742                         for (i = 0; i < ldb_ret; i++) {
 743                                 switch (format_offered) {
 744                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 745                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
 746                                         break;
 747                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 748                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
 749                                         break;
 750                                 }
 751                                 if (strcasecmp_m(canonical_name, name) == 0) {
 752                                         result = result_res[i];
 753                                         break;
 754                                 }
 755                         }
 756                         if (!result) {
 757                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 758                                 return WERR_OK;
 759                         }
 760                 }
 761                 default:
 762                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 763                         return WERR_OK;
 764                 }
 765         }
 766
 767         /* here we can use result and domain_res[0] */
 768         switch (format_desired) {
 769         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 770                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
 771                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 772
 773                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 774                 return WERR_OK;
 775         }
 776         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 777                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
 778                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 779                 return WERR_OK;
 780         }
 781         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 782                 /* Not in the virtual ldb attribute */
 783                 return DsCrackNameOneSyntactical(mem_ctx,
 784                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 785                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 786                                                  result->dn, name, info1);
 787         }
 788         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 789
 790                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
 791                 const char *_acc = "", *_dom = "";
 792
 793                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
 794                         ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 795                                                "(ncName=%s)", ldb_dn_get_linearized(result->dn));
 796                         if (ldb_ret != 1) {
 797                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 798                                 return WERR_OK;
 799                         }
 800                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 801                         W_ERROR_HAVE_NO_MEMORY(_dom);
 802                 } else {
 803                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
 804                         if (!_acc) {
 805                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 806                                 return WERR_OK;
 807                         }
 808                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
 809                                 _dom = "BUILTIN";
 810                         } else {
 811                                 const char *attrs[] = { NULL };
 812                                 struct ldb_message **domain_res2;
 813                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 814                                 if (!dom_sid) {
 815                                         return WERR_OK;
 816                                 }
 817                                 dom_sid->num_auths--;
 818                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 819                                                        "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 820                                 if (ldb_ret != 1) {
 821                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 822                                         return WERR_OK;
 823                                 }
 824                                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res2, domain_attrs,
 825                                                        "(ncName=%s)", ldb_dn_get_linearized(domain_res[0]->dn));
 826                                 if (ldb_ret != 1) {
 827                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 828                                         return WERR_OK;
 829                                 }
 830
 831                                 _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 832                                 W_ERROR_HAVE_NO_MEMORY(_dom);
 833                         }
 834                 }
 835
 836                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 837                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 838
 839                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 840                 return WERR_OK;
 841         }
 842         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 843                 struct GUID guid;
 844
 845                 guid = samdb_result_guid(result, "objectGUID");
 846
 847                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 848                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 849
 850                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 851                 return WERR_OK;
 852         }
 853         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 854                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
 855                 if (!info1->result_name) {
 856                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
 857                 }
 858                 if (!info1->result_name) {
 859                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 860                 } else {
 861                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 862                 }
 863                 return WERR_OK;
 864         }
 865         default:
 866                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 867                 return WERR_OK;
 868         }
 869
 870         return WERR_INVALID_PARAM;
 871 }
 872
 873 /* Given a user Principal Name (such as foo@bar.com),
 874  * return the user and domain DNs.  This is used in the KDC to then
 875  * return the Keys and evaluate policy */
 876
 877 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
 878                                    TALLOC_CTX *mem_ctx,
 879                                    const char *user_principal_name,
 880                                    struct ldb_dn **user_dn,
 881                                    struct ldb_dn **domain_dn)
 882 {
 883         WERROR werr;
 884         struct drsuapi_DsNameInfo1 info1;
 885         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 886                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 887                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 888                                   user_principal_name,
 889                                   &info1);
 890         if (!W_ERROR_IS_OK(werr)) {
 891                 return werror_to_ntstatus(werr);
 892         }
 893         switch (info1.status) {
 894         case DRSUAPI_DS_NAME_STATUS_OK:
 895                 break;
 896         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 897         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 898         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 899                 return NT_STATUS_NO_SUCH_USER;
 900         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 901         default:
 902                 return NT_STATUS_UNSUCCESSFUL;
 903         }
 904
 905         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 906
 907         if (domain_dn) {
 908                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 909                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 910                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 911                                           talloc_asprintf(mem_ctx, "%s/",
 912                                                           info1.dns_domain_name),
 913                                           &info1);
 914                 if (!W_ERROR_IS_OK(werr)) {
 915                         return werror_to_ntstatus(werr);
 916                 }
 917                 switch (info1.status) {
 918                 case DRSUAPI_DS_NAME_STATUS_OK:
 919                         break;
 920                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 921                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 922                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 923                         return NT_STATUS_NO_SUCH_USER;
 924                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 925                 default:
 926                         return NT_STATUS_UNSUCCESSFUL;
 927                 }
 928
 929                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 930         }
 931
 932         return NT_STATUS_OK;
 933
 934 }
 935
 936 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
 937  * return the user and domain DNs.  This is used in the KDC to then
 938  * return the Keys and evaluate policy */
 939
 940 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
 941                                       TALLOC_CTX *mem_ctx,
 942                                       const char *service_principal_name,
 943                                       struct ldb_dn **user_dn,
 944                                       struct ldb_dn **domain_dn)
 945 {
 946         WERROR werr;
 947         struct drsuapi_DsNameInfo1 info1;
 948         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 949                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 950                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 951                                   service_principal_name,
 952                                   &info1);
 953         if (!W_ERROR_IS_OK(werr)) {
 954                 return werror_to_ntstatus(werr);
 955         }
 956         switch (info1.status) {
 957         case DRSUAPI_DS_NAME_STATUS_OK:
 958                 break;
 959         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 960         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 961         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 962                 return NT_STATUS_NO_SUCH_USER;
 963         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 964         default:
 965                 return NT_STATUS_UNSUCCESSFUL;
 966         }
 967
 968         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 969
 970         if (domain_dn) {
 971                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 972                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 973                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 974                                           talloc_asprintf(mem_ctx, "%s/",
 975                                                           info1.dns_domain_name),
 976                                           &info1);
 977                 if (!W_ERROR_IS_OK(werr)) {
 978                         return werror_to_ntstatus(werr);
 979                 }
 980                 switch (info1.status) {
 981                 case DRSUAPI_DS_NAME_STATUS_OK:
 982                         break;
 983                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 984                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 985                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 986                         return NT_STATUS_NO_SUCH_USER;
 987                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 988                 default:
 989                         return NT_STATUS_UNSUCCESSFUL;
 990                 }
 991
 992                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 993         }
 994
 995         return NT_STATUS_OK;
 996
 997 }
 998
 999 NTSTATUS crack_dn_to_nt4_name(TALLOC_CTX *mem_ctx,
1000                               const char *dn,
1001                               const char **nt4_domain, const char **nt4_account)
1002 {
1003         WERROR werr;
1004         struct drsuapi_DsNameInfo1 info1;
1005         struct ldb_context *ldb;
1006         char *p;
1007
1008         /* Handle anonymous bind */
1009         if (!dn || !*dn) {
1010                 *nt4_domain = "";
1011                 *nt4_account = "";
1012                 return NT_STATUS_OK;
1013         }
1014
1015         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
1016         if (ldb == NULL) {
1017                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1018         }
1019
1020         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1021                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
1022                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1023                                   dn,
1024                                   &info1);
1025         if (!W_ERROR_IS_OK(werr)) {
1026                 return werror_to_ntstatus(werr);
1027         }
1028         switch (info1.status) {
1029         case DRSUAPI_DS_NAME_STATUS_OK:
1030                 break;
1031         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1032         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1033         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1034                 return NT_STATUS_NO_SUCH_USER;
1035         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1036         default:
1037                 return NT_STATUS_UNSUCCESSFUL;
1038         }
1039
1040         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1041
1042         p = strchr(*nt4_domain, '\\');
1043         if (!p) {
1044                 return NT_STATUS_INVALID_PARAMETER;
1045         }
1046         p[0] = '\0';
1047
1048         if (p[1]) {
1049                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1050         }
1051
1052         if (!*nt4_account || !*nt4_domain) {
1053                 return NT_STATUS_NO_MEMORY;
1054         }
1055
1056         return NT_STATUS_OK;
1057
1058 }