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_linearize(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                 char *str;
 311
 312                 str = talloc_strdup(mem_ctx, name);
 313                 W_ERROR_HAVE_NO_MEMORY(str);
 314
 315                 if (strlen(str) == 0 || str[strlen(str)-1] != '/') {
 316                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 317                         return WERR_OK;
 318                 }
 319
 320                 str[strlen(str)-1] = '\0';
 321
 322                 domain_filter = talloc_asprintf(mem_ctx,
 323                                                 "(&(&(&(dnsRoot=%s)(objectclass=crossRef)))(nETBIOSName=*)(ncName=*))",
 324                                                 ldb_binary_encode_string(mem_ctx, str));
 325                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 326
 327                 break;
 328         }
 329         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 330                 char *p;
 331                 char *domain;
 332                 const char *account = NULL;
 333
 334                 domain = talloc_strdup(mem_ctx, name);
 335                 W_ERROR_HAVE_NO_MEMORY(domain);
 336
 337                 p = strchr(domain, '\\');
 338                 if (!p) {
 339                         /* invalid input format */
 340                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 341                         return WERR_OK;
 342                 }
 343                 p[0] = '\0';
 344
 345                 if (p[1]) {
 346                         account = &p[1];
 347                 }
 348
 349                 domain_filter = talloc_asprintf(mem_ctx,
 350                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 351                                                 ldb_binary_encode_string(mem_ctx, domain));
 352                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
 353                 if (account) {
 354                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 355                                                         ldb_binary_encode_string(mem_ctx, account));
 356                         W_ERROR_HAVE_NO_MEMORY(result_filter);
 357                 }
 358
 359                 talloc_free(domain);
 360                 break;
 361         }
 362
 363                 /* A LDAP DN as a string */
 364         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 365                 domain_filter = NULL;
 366                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
 367                 if (! ldb_dn_validate(name_dn)) {
 368                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 369                         return WERR_OK;
 370                 }
 371                 break;
 372         }
 373
 374                 /* A GUID as a string */
 375         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 376                 struct GUID guid;
 377                 char *ldap_guid;
 378                 NTSTATUS nt_status;
 379                 domain_filter = NULL;
 380
 381                 nt_status = GUID_from_string(name, &guid);
 382                 if (!NT_STATUS_IS_OK(nt_status)) {
 383                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 384                         return WERR_OK;
 385                 }
 386
 387                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 388                 if (!ldap_guid) {
 389                         return WERR_NOMEM;
 390                 }
 391                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 392                                                 ldap_guid);
 393                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 394                 break;
 395         }
 396         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 397                 domain_filter = NULL;
 398
 399                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 400                                                 ldb_binary_encode_string(mem_ctx, name),
 401                                                 ldb_binary_encode_string(mem_ctx, name));
 402                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 403                 break;
 404         }
 405
 406                 /* A S-1234-5678 style string */
 407         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 408                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 409                 char *ldap_sid;
 410
 411                 domain_filter = NULL;
 412                 if (!sid) {
 413                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 414                         return WERR_OK;
 415                 }
 416                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 417                                                    sid);
 418                 if (!ldap_sid) {
 419                         return WERR_NOMEM;
 420                 }
 421                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 422                                                 ldap_sid);
 423                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 424                 break;
 425         }
 426         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 427                 krb5_principal principal;
 428                 char *unparsed_name;
 429                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 430                 if (ret) {
 431                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 432                         return WERR_OK;
 433                 }
 434
 435                 domain_filter = NULL;
 436
 437                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 438                 if (ret) {
 439                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 440                         return WERR_NOMEM;
 441                 }
 442
 443                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 444                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 445                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 446
 447                 free(unparsed_name);
 448                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 449                 break;
 450         }
 451         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 452                 krb5_principal principal;
 453                 char *unparsed_name_short;
 454                 char *service;
 455                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 456                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
 457                 if (ret) {
 458                         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
 459                         char **realm;
 460                         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name,
 461                                                     KRB5_PRINCIPAL_PARSE_MUST_REALM, &principal);
 462                         if (ret) {
 463                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 464                                 return WERR_OK;
 465                         }
 466
 467                         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
 468                         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 469
 470                         info1->dns_domain_name  = talloc_strdup(info1, *realm);
 471                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 472
 473                         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 474
 475                         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 476                         return WERR_OK;
 477
 478                 } else if (principal->name.name_string.len < 2) {
 479                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 480                         return WERR_OK;
 481                 }
 482
 483                 domain_filter = NULL;
 484
 485                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal,
 486                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
 487                 if (ret) {
 488                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 489                         return WERR_NOMEM;
 490                 }
 491
 492                 service = principal->name.name_string.val[0];
 493                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 494                         /* the 'cn' attribute is just the leading part of the name */
 495                         char *computer_name;
 496                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 497                                                       strcspn(principal->name.name_string.val[1], "."));
 498                         if (computer_name == NULL) {
 499                                 return WERR_NOMEM;
 500                         }
 501
 502                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 503                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 504                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 505                 } else {
 506                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 507                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 508                 }
 509                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 510                 free(unparsed_name_short);
 511                 W_ERROR_HAVE_NO_MEMORY(result_filter);
 512
 513                 break;
 514         }
 515         default: {
 516                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 517                 return WERR_OK;
 518         }
 519
 520         }
 521
 522         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 523                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 524                                                  name_dn, name, info1);
 525         }
 526
 527         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 528                                     smb_krb5_context,
 529                                     format_flags, format_offered, format_desired,
 530                                     name_dn, name,
 531                                     domain_filter, result_filter,
 532                                     info1);
 533 }
 534
 535 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 536  * (FQDN_1779) into a canoical name without actually searching the
 537  * database */
 538
 539 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 540                                         uint32_t format_offered, uint32_t format_desired,
 541                                         struct ldb_dn *name_dn, const char *name,
 542                                         struct drsuapi_DsNameInfo1 *info1)
 543 {
 544         char *cracked;
 545         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 546                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 547                 return WERR_OK;
 548         }
 549
 550         switch (format_desired) {
 551         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 552                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 553                 break;
 554         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 555                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 556                 break;
 557         default:
 558                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 559                 return WERR_OK;
 560         }
 561         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 562         info1->result_name      = cracked;
 563         if (!cracked) {
 564                 return WERR_NOMEM;
 565         }
 566
 567         return WERR_OK;
 568 }
 569
 570 /* Given a filter for the domain, and one for the result, perform the
 571  * ldb search. The format offered and desired flags change the
 572  * behaviours, including what attributes to return.
 573  *
 574  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 575  */
 576
 577 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 578                                    struct smb_krb5_context *smb_krb5_context,
 579                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 580                                    struct ldb_dn *name_dn, const char *name,
 581                                    const char *domain_filter, const char *result_filter,
 582                                    struct drsuapi_DsNameInfo1 *info1)
 583 {
 584         int ldb_ret;
 585         struct ldb_message **domain_res = NULL;
 586         const char * const *domain_attrs;
 587         const char * const *result_attrs;
 588         struct ldb_message **result_res = NULL;
 589         struct ldb_dn *result_basedn;
 590         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
 591
 592         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 593         const char * const _result_attrs_null[] = { NULL };
 594
 595         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 596         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 597
 598         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 599         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", NULL};
 600
 601         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 602         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 603
 604         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 605         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 606
 607         /* here we need to set the attrs lists for domain and result lookups */
 608         switch (format_desired) {
 609         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 610         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 611                 domain_attrs = _domain_attrs_1779;
 612                 result_attrs = _result_attrs_null;
 613                 break;
 614         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 615                 domain_attrs = _domain_attrs_canonical;
 616                 result_attrs = _result_attrs_canonical;
 617                 break;
 618         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 619                 domain_attrs = _domain_attrs_nt4;
 620                 result_attrs = _result_attrs_nt4;
 621                 break;
 622         case DRSUAPI_DS_NAME_FORMAT_GUID:
 623                 domain_attrs = _domain_attrs_guid;
 624                 result_attrs = _result_attrs_guid;
 625                 break;
 626         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 627                 domain_attrs = _domain_attrs_display;
 628                 result_attrs = _result_attrs_display;
 629                 break;
 630         default:
 631                 return WERR_OK;
 632         }
 633
 634         if (domain_filter) {
 635                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 636                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 637                                        "%s", domain_filter);
 638         } else {
 639                 ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 640                                        "(ncName=%s)", ldb_dn_linearize(mem_ctx, samdb_base_dn(sam_ctx)));
 641         }
 642
 643         switch (ldb_ret) {
 644         case 1:
 645                 break;
 646         case 0:
 647                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 648                 return WERR_OK;
 649         case -1:
 650                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 651                 return WERR_OK;
 652         default:
 653                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 654                 return WERR_OK;
 655         }
 656
 657         info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 658         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
 659         info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 660
 661         if (result_filter) {
 662                 result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 663
 664                 ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 665                                        result_attrs, "%s", result_filter);
 666         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 667                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 668                                           result_attrs);
 669         } else {
 670                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res[0], "ncName", NULL);
 671                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 672                                           result_attrs);
 673         }
 674
 675         switch (ldb_ret) {
 676         case 1:
 677                 break;
 678         case 0:
 679                 switch (format_offered) {
 680                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 681                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 682                                                    smb_krb5_context,
 683                                                    format_flags, format_offered, format_desired,
 684                                                    name, info1);
 685
 686                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 687                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 688                                               format_flags, format_offered, format_desired,
 689                                               name, info1);
 690                 }
 691                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 692                 return WERR_OK;
 693         case -1:
 694                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 695                 return WERR_OK;
 696         default:
 697                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 698                 return WERR_OK;
 699         }
 700
 701         /* here we can use result_res[0] and domain_res[0] */
 702         switch (format_desired) {
 703         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 704                 info1->result_name      = ldb_dn_linearize(mem_ctx, result_res[0]->dn);
 705                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 706
 707                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 708                 return WERR_OK;
 709         }
 710         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 711                 info1->result_name      = samdb_result_string(result_res[0], "canonicalName", NULL);
 712                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 713                 return WERR_OK;
 714         }
 715         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 716                 /* Not in the virtual ldb attribute */
 717                 return DsCrackNameOneSyntactical(mem_ctx,
 718                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 719                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 720                                                  result_res[0]->dn, name, info1);
 721         }
 722         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 723                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result_res[0], "objectSid");
 724                 const char *_acc = "", *_dom = "";
 725
 726                 if (!sid || (sid->num_auths < 4) || (sid->num_auths > 5)) {
 727                         info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 728                         return WERR_OK;
 729                 }
 730
 731                 if (sid->num_auths == 4) {
 732                         ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res, domain_attrs,
 733                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, result_res[0]->dn));
 734                         if (ldb_ret != 1) {
 735                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 736                                 return WERR_OK;
 737                         }
 738                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 739                         W_ERROR_HAVE_NO_MEMORY(_dom);
 740
 741                 } else if (sid->num_auths == 5) {
 742                         const char *attrs[] = { NULL };
 743                         struct ldb_message **domain_res2;
 744                         struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 745                         if (!dom_sid) {
 746                                 return WERR_OK;
 747                         }
 748                         dom_sid->num_auths--;
 749                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 750                                                "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 751                         if (ldb_ret != 1) {
 752                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 753                                 return WERR_OK;
 754                         }
 755                         ldb_ret = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &domain_res2, domain_attrs,
 756                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, domain_res[0]->dn));
 757                         if (ldb_ret != 1) {
 758                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 759                                 return WERR_OK;
 760                         }
 761
 762                         _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 763                         W_ERROR_HAVE_NO_MEMORY(_dom);
 764
 765                         _acc = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 766                         W_ERROR_HAVE_NO_MEMORY(_acc);
 767                 }
 768
 769                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 770                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 771
 772                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 773                 return WERR_OK;
 774         }
 775         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 776                 struct GUID guid;
 777
 778                 guid = samdb_result_guid(result_res[0], "objectGUID");
 779
 780                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 781                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
 782
 783                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 784                 return WERR_OK;
 785         }
 786         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 787                 info1->result_name      = samdb_result_string(result_res[0], "displayName", NULL);
 788                 if (!info1->result_name) {
 789                         info1->result_name      = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 790                 }
 791                 if (!info1->result_name) {
 792                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 793                 } else {
 794                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 795                 }
 796                 return WERR_OK;
 797         }
 798         default:
 799                 return WERR_OK;
 800         }
 801
 802         return WERR_INVALID_PARAM;
 803 }
 804
 805 /* Given a user Principal Name (such as foo@bar.com),
 806  * return the user and domain DNs.  This is used in the KDC to then
 807  * return the Keys and evaluate policy */
 808
 809 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
 810                                    TALLOC_CTX *mem_ctx,
 811                                    const char *user_principal_name,
 812                                    struct ldb_dn **user_dn,
 813                                    struct ldb_dn **domain_dn)
 814 {
 815         WERROR werr;
 816         struct drsuapi_DsNameInfo1 info1;
 817         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 818                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 819                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 820                                   user_principal_name,
 821                                   &info1);
 822         if (!W_ERROR_IS_OK(werr)) {
 823                 return werror_to_ntstatus(werr);
 824         }
 825         switch (info1.status) {
 826         case DRSUAPI_DS_NAME_STATUS_OK:
 827                 break;
 828         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 829         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 830         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 831                 return NT_STATUS_NO_SUCH_USER;
 832         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 833         default:
 834                 return NT_STATUS_UNSUCCESSFUL;
 835         }
 836
 837         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 838
 839         if (domain_dn) {
 840                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 841                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 842                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 843                                           talloc_asprintf(mem_ctx, "%s/",
 844                                                           info1.dns_domain_name),
 845                                           &info1);
 846                 if (!W_ERROR_IS_OK(werr)) {
 847                         return werror_to_ntstatus(werr);
 848                 }
 849                 switch (info1.status) {
 850                 case DRSUAPI_DS_NAME_STATUS_OK:
 851                         break;
 852                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 853                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 854                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 855                         return NT_STATUS_NO_SUCH_USER;
 856                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 857                 default:
 858                         return NT_STATUS_UNSUCCESSFUL;
 859                 }
 860
 861                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 862         }
 863
 864         return NT_STATUS_OK;
 865
 866 }
 867
 868 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
 869  * return the user and domain DNs.  This is used in the KDC to then
 870  * return the Keys and evaluate policy */
 871
 872 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
 873                                       TALLOC_CTX *mem_ctx,
 874                                       const char *service_principal_name,
 875                                       struct ldb_dn **user_dn,
 876                                       struct ldb_dn **domain_dn)
 877 {
 878         WERROR werr;
 879         struct drsuapi_DsNameInfo1 info1;
 880         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 881                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 882                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 883                                   service_principal_name,
 884                                   &info1);
 885         if (!W_ERROR_IS_OK(werr)) {
 886                 return werror_to_ntstatus(werr);
 887         }
 888         switch (info1.status) {
 889         case DRSUAPI_DS_NAME_STATUS_OK:
 890                 break;
 891         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 892         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 893         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 894                 return NT_STATUS_NO_SUCH_USER;
 895         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 896         default:
 897                 return NT_STATUS_UNSUCCESSFUL;
 898         }
 899
 900         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 901
 902         if (domain_dn) {
 903                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 904                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 905                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 906                                           talloc_asprintf(mem_ctx, "%s/",
 907                                                           info1.dns_domain_name),
 908                                           &info1);
 909                 if (!W_ERROR_IS_OK(werr)) {
 910                         return werror_to_ntstatus(werr);
 911                 }
 912                 switch (info1.status) {
 913                 case DRSUAPI_DS_NAME_STATUS_OK:
 914                         break;
 915                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 916                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 917                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 918                         return NT_STATUS_NO_SUCH_USER;
 919                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 920                 default:
 921                         return NT_STATUS_UNSUCCESSFUL;
 922                 }
 923
 924                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
 925         }
 926
 927         return NT_STATUS_OK;
 928
 929 }
 930
 931 NTSTATUS crack_dn_to_nt4_name(TALLOC_CTX *mem_ctx,
 932                               const char *dn,
 933                               const char **nt4_domain, const char **nt4_account)
 934 {
 935         WERROR werr;
 936         struct drsuapi_DsNameInfo1 info1;
 937         struct ldb_context *ldb;
 938         char *p;
 939
 940         /* Handle anonymous bind */
 941         if (!dn || !*dn) {
 942                 *nt4_domain = "";
 943                 *nt4_account = "";
 944                 return NT_STATUS_OK;
 945         }
 946
 947         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
 948         if (ldb == NULL) {
 949                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 950         }
 951
 952         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
 953                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 954                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
 955                                   dn,
 956                                   &info1);
 957         if (!W_ERROR_IS_OK(werr)) {
 958                 return werror_to_ntstatus(werr);
 959         }
 960         switch (info1.status) {
 961         case DRSUAPI_DS_NAME_STATUS_OK:
 962                 break;
 963         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 964         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 965         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 966                 return NT_STATUS_NO_SUCH_USER;
 967         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 968         default:
 969                 return NT_STATUS_UNSUCCESSFUL;
 970         }
 971
 972         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
 973
 974         p = strchr(*nt4_domain, '\\');
 975         if (!p) {
 976                 return NT_STATUS_INVALID_PARAMETER;
 977         }
 978         p[0] = '\0';
 979
 980         if (p[1]) {
 981                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
 982         }
 983
 984         if (!*nt4_account || !*nt4_domain) {
 985                 return NT_STATUS_NO_MEMORY;
 986         }
 987
 988         return NT_STATUS_OK;
 989
 990 }