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/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 "dsdb/samdb/samdb.h"
  32 #include "libcli/ldap/ldap.h"
  33 #include "libcli/security/proto.h"
  34 #include "auth/auth.h"
  35 #include "db_wrap.h"
  36
  37 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  38                                    struct smb_krb5_context *smb_krb5_context,
  39                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
  40                                    const struct ldb_dn *name_dn, const char *name,
  41                                    const char *domain_filter, const char *result_filter,
  42                                    struct drsuapi_DsNameInfo1 *info1);
  43 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  44                                         uint32_t format_offered, uint32_t format_desired,
  45                                         const struct ldb_dn *name_dn, const char *name,
  46                                         struct drsuapi_DsNameInfo1 *info1);
  47
  48 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  49                                                       TALLOC_CTX *mem_ctx,
  50                                                       const char *alias_from,
  51                                                       char **alias_to)
  52 {
  53         int i;
  54         int ret;
  55         struct ldb_result *res;
  56         struct ldb_message_element *spnmappings;
  57         TALLOC_CTX *tmp_ctx;
  58         struct ldb_dn *service_dn;
  59         char *service_dn_str;
  60
  61         const char *directory_attrs[] = {
  62                 "sPNMappings",
  63                 NULL
  64         };
  65
  66         tmp_ctx = talloc_new(mem_ctx);
  67         if (!tmp_ctx) {
  68                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  69         }
  70
  71         service_dn = ldb_dn_string_compose(tmp_ctx, samdb_base_dn(tmp_ctx),
  72                                            "CN=Directory Service,CN=Windows NT"
  73                                            ",CN=Services,CN=Configuration");
  74         service_dn_str = ldb_dn_linearize(tmp_ctx, service_dn);
  75
  76         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
  77                          directory_attrs, &res);
  78
  79         if (ret != LDB_SUCCESS) {
  80                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
  81                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  82         } else if (res->count != 1) {
  83                 talloc_free(res);
  84                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
  85                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  86         }
  87         talloc_steal(tmp_ctx, res);
  88
  89         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
  90         if (!spnmappings || spnmappings->num_values == 0) {
  91                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
  92                 talloc_free(tmp_ctx);
  93                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  94         }
  95
  96         for (i = 0; i < spnmappings->num_values; i++) {
  97                 char *mapping, *p, *str;
  98                 mapping = talloc_strdup(tmp_ctx,
  99                                         (const char *)spnmappings->values[i].data);
 100                 if (!mapping) {
 101                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 102                         talloc_free(tmp_ctx);
 103                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 104                 }
 105
 106                 /* C string manipulation sucks */
 107
 108                 p = strchr(mapping, '=');
 109                 if (!p) {
 110                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 111                                   service_dn_str, mapping));
 112                         talloc_free(tmp_ctx);
 113                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 114                 }
 115                 p[0] = '\0';
 116                 p++;
 117                 do {
 118                         str = p;
 119                         p = strchr(p, ',');
 120                         if (p) {
 121                                 p[0] = '\0';
 122                                 p++;
 123                         }
 124                         if (strcasecmp(str, alias_from) == 0) {
 125                                 *alias_to = mapping;
 126                                 talloc_steal(mem_ctx, mapping);
 127                                 talloc_free(tmp_ctx);
 128                                 return DRSUAPI_DS_NAME_STATUS_OK;
 129                         }
 130                 } while (p);
 131         }
 132         DEBUG(1, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 133         talloc_free(tmp_ctx);
 134         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 135 }
 136
 137 /* When cracking a ServicePrincipalName, many services may be served
 138  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 139  * but we translate it here, and search on host/.  This is done after
 140  * the cifs/ entry has been searched for, making this a fallback */
 141
 142 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 143                                   struct smb_krb5_context *smb_krb5_context,
 144                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 145                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 146 {
 147         WERROR wret;
 148         krb5_error_code ret;
 149         krb5_principal principal;
 150         const char *service;
 151         char *new_service;
 152         char *new_princ;
 153         enum drsuapi_DsNameStatus namestatus;
 154
 155         /* parse principal */
 156         ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context,
 157                                       name, &principal);
 158         if (ret) {
 159                 DEBUG(2, ("Could not parse principal: %s: %s",
 160                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 161                                                            ret, mem_ctx)));
 162                 return WERR_NOMEM;
 163         }
 164
 165         /* grab cifs/, http/ etc */
 166
 167         /* This is checked for in callers, but be safe */
 168         if (principal->name.name_string.len < 2) {
 169                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 170                 return WERR_OK;
 171         }
 172         service = principal->name.name_string.val[0];
 173
 174         /* MAP it */
 175         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 176                                           sam_ctx, mem_ctx,
 177                                           service, &new_service);
 178
 179         if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 180                 info1->status = namestatus;
 181                 return WERR_OK;
 182         }
 183
 184         if (ret != 0) {
 185                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 186                 return WERR_OK;
 187         }
 188
 189         /* ooh, very nasty playing around in the Principal... */
 190         free(principal->name.name_string.val[0]);
 191         principal->name.name_string.val[0] = strdup(new_service);
 192         if (!principal->name.name_string.val[0]) {
 193                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 194                 return WERR_NOMEM;
 195         }
 196
 197         /* reform principal */
 198         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &new_princ);
 199
 200         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 201
 202         if (ret) {
 203                 return WERR_NOMEM;
 204         }
 205
 206         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 207                                   new_princ, info1);
 208         free(new_princ);
 209         return wret;
 210 }
 211
 212 /* Subcase of CrackNames, for the userPrincipalName */
 213
 214 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 215                              struct smb_krb5_context *smb_krb5_context,
 216                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 217                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 218 {
 219         WERROR status;
 220         const char *domain_filter = NULL;
 221         const char *result_filter = NULL;
 222         krb5_error_code ret;
 223         krb5_principal principal;
 224         char **realm;
 225         char *unparsed_name_short;
 226
 227         /* Prevent recursion */
 228         if (!name) {
 229                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 230                 return WERR_OK;
 231         }
 232
 233         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 234         if (ret) {
 235                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 236                 return WERR_OK;
 237         }
 238
 239         domain_filter = NULL;
 240         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 241         domain_filter = talloc_asprintf(mem_ctx,
 242                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 243                                         ldb_binary_encode_string(mem_ctx, *realm),
 244                                         ldb_binary_encode_string(mem_ctx, *realm));
 245         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 246         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 247
 248         if (ret) {
 249                 free(unparsed_name_short);
 250                 return WERR_NOMEM;
 251         }
 252
 253         /* This may need to be extended for more userPrincipalName variations */
 254         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 255                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 256         if (!result_filter || !domain_filter) {
 257                 free(unparsed_name_short);
 258                 return WERR_NOMEM;
 259         }
 260         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 261                                       smb_krb5_context,
 262                                       format_flags, format_offered, format_desired,
 263                                       NULL, unparsed_name_short, domain_filter, result_filter,
 264                                       info1);
 265         free(unparsed_name_short);
 266         return status;
 267 }
 268
 269 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 270
 271 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 272                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 273                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 274 {
 275         krb5_error_code ret;
 276         const char *domain_filter = NULL;
 277         const char *result_filter = NULL;
 278         struct ldb_dn *name_dn = NULL;
 279
 280         struct smb_krb5_context *smb_krb5_context;
 281         ret = smb_krb5_init_context(mem_ctx, &smb_krb5_context);
 282
 283         if (ret) {
 284                 return WERR_NOMEM;
 285         }
 286
 287         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 288         info1->dns_domain_name = NULL;
 289         info1->result_name = NULL;
 290
 291         if (!name) {
 292                 return WERR_INVALID_PARAM;
 293         }
 294
 295         /* TODO: - fill the correct names in all cases!
 296          *       - handle format_flags
 297          */
 298
 299         /* here we need to set the domain_filter and/or the result_filter */
 300         switch (format_offered) {
 301         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 302                 char *str;
 303
 304                 str = talloc_strdup(mem_ctx, name);
 305                 WERR_TALLOC_CHECK(str);
 306
 307                 if (strlen(str) == 0 || str[strlen(str)-1] != '/') {
 308                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 309                         return WERR_OK;
 310                 }
 311
 312                 str[strlen(str)-1] = '\0';
 313
 314                 domain_filter = talloc_asprintf(mem_ctx,
 315                                                 "(&(&(&(dnsRoot=%s)(objectclass=crossRef)))(nETBIOSName=*)(ncName=*))",
 316                                                 ldb_binary_encode_string(mem_ctx, str));
 317                 WERR_TALLOC_CHECK(domain_filter);
 318
 319                 break;
 320         }
 321         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 322                 char *p;
 323                 char *domain;
 324                 const char *account = NULL;
 325
 326                 domain = talloc_strdup(mem_ctx, name);
 327                 WERR_TALLOC_CHECK(domain);
 328
 329                 p = strchr(domain, '\\');
 330                 if (!p) {
 331                         /* invalid input format */
 332                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 333                         return WERR_OK;
 334                 }
 335                 p[0] = '\0';
 336
 337                 if (p[1]) {
 338                         account = &p[1];
 339                 }
 340
 341                 domain_filter = talloc_asprintf(mem_ctx,
 342                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 343                                                 ldb_binary_encode_string(mem_ctx, domain));
 344                 WERR_TALLOC_CHECK(domain_filter);
 345                 if (account) {
 346                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 347                                                         ldb_binary_encode_string(mem_ctx, account));
 348                         WERR_TALLOC_CHECK(result_filter);
 349                 }
 350
 351                 talloc_free(domain);
 352                 break;
 353         }
 354
 355                 /* A LDAP DN as a string */
 356         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 357                 name_dn = ldb_dn_explode(mem_ctx, name);
 358                 domain_filter = NULL;
 359                 if (!name_dn) {
 360                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 361                         return WERR_OK;
 362                 }
 363                 break;
 364         }
 365
 366                 /* A GUID as a string */
 367         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 368                 struct GUID guid;
 369                 char *ldap_guid;
 370                 NTSTATUS nt_status;
 371                 domain_filter = NULL;
 372
 373                 nt_status = GUID_from_string(name, &guid);
 374                 if (!NT_STATUS_IS_OK(nt_status)) {
 375                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 376                         return WERR_OK;
 377                 }
 378
 379                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 380                 if (!ldap_guid) {
 381                         return WERR_NOMEM;
 382                 }
 383                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 384                                                 ldap_guid);
 385                 WERR_TALLOC_CHECK(result_filter);
 386                 break;
 387         }
 388         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 389                 domain_filter = NULL;
 390
 391                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 392                                                 ldb_binary_encode_string(mem_ctx, name),
 393                                                 ldb_binary_encode_string(mem_ctx, name));
 394                 WERR_TALLOC_CHECK(result_filter);
 395                 break;
 396         }
 397
 398                 /* A S-1234-5678 style string */
 399         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 400                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 401                 char *ldap_sid;
 402
 403                 domain_filter = NULL;
 404                 if (!sid) {
 405                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 406                         return WERR_OK;
 407                 }
 408                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 409                                                    sid);
 410                 if (!ldap_sid) {
 411                         return WERR_NOMEM;
 412                 }
 413                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 414                                                 ldap_sid);
 415                 WERR_TALLOC_CHECK(result_filter);
 416                 break;
 417         }
 418         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 419                 krb5_principal principal;
 420                 char *unparsed_name;
 421                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 422                 if (ret) {
 423                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 424                         return WERR_OK;
 425                 }
 426
 427                 domain_filter = NULL;
 428
 429                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 430                 if (ret) {
 431                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 432                         return WERR_NOMEM;
 433                 }
 434
 435                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 436                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 437                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 438
 439                 free(unparsed_name);
 440                 WERR_TALLOC_CHECK(result_filter);
 441                 break;
 442         }
 443         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 444                 krb5_principal principal;
 445                 char *unparsed_name_short;
 446                 char *service;
 447                 ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context, name, &principal);
 448                 if (ret) {
 449                         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
 450                         char **realm;
 451                         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 452                         if (ret) {
 453                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 454                                 return WERR_OK;
 455                         }
 456
 457                         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
 458                         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 459
 460                         info1->dns_domain_name  = talloc_strdup(info1, *realm);
 461                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 462
 463                         WERR_TALLOC_CHECK(info1->dns_domain_name);
 464
 465                         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 466                         return WERR_OK;
 467
 468                 } else if (principal->name.name_string.len < 2) {
 469                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 470                         return WERR_OK;
 471                 }
 472
 473                 domain_filter = NULL;
 474
 475                 ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 476                 if (ret) {
 477                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 478                         return WERR_NOMEM;
 479                 }
 480
 481                 service = principal->name.name_string.val[0];
 482                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 483                         /* the 'cn' attribute is just the leading part of the name */
 484                         char *computer_name;
 485                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 486                                                       strcspn(principal->name.name_string.val[1], "."));
 487                         if (computer_name == NULL) {
 488                                 return WERR_NOMEM;
 489                         }
 490
 491                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 492                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 493                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 494                 } else {
 495                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 496                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 497                 }
 498                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 499                 free(unparsed_name_short);
 500                 WERR_TALLOC_CHECK(result_filter);
 501
 502                 break;
 503         }
 504         default: {
 505                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 506                 return WERR_OK;
 507         }
 508
 509         }
 510
 511         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 512                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 513                                                  name_dn, name, info1);
 514         }
 515
 516         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 517                                     smb_krb5_context,
 518                                     format_flags, format_offered, format_desired,
 519                                     name_dn, name,
 520                                     domain_filter, result_filter,
 521                                     info1);
 522 }
 523
 524 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 525  * (FQDN_1779) into a canoical name without actually searching the
 526  * database */
 527
 528 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 529                                         uint32_t format_offered, uint32_t format_desired,
 530                                         const struct ldb_dn *name_dn, const char *name,
 531                                         struct drsuapi_DsNameInfo1 *info1)
 532 {
 533         char *cracked;
 534         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 535                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 536                 return WERR_OK;
 537         }
 538
 539         switch (format_desired) {
 540         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 541                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 542                 break;
 543         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 544                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 545                 break;
 546         default:
 547                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 548                 return WERR_OK;
 549         }
 550         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 551         info1->result_name      = cracked;
 552         if (!cracked) {
 553                 return WERR_NOMEM;
 554         }
 555
 556         return WERR_OK;
 557 }
 558
 559 /* Given a filter for the domain, and one for the result, perform the
 560  * ldb search. The format offered and desired flags change the
 561  * behaviours, including what attributes to return.
 562  *
 563  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 564  */
 565
 566 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 567                                    struct smb_krb5_context *smb_krb5_context,
 568                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 569                                    const struct ldb_dn *name_dn, const char *name,
 570                                    const char *domain_filter, const char *result_filter,
 571                                    struct drsuapi_DsNameInfo1 *info1)
 572 {
 573         int ldb_ret;
 574         struct ldb_message **domain_res = NULL;
 575         const char * const *domain_attrs;
 576         const char * const *result_attrs;
 577         struct ldb_message **result_res = NULL;
 578         const struct ldb_dn *result_basedn;
 579
 580         /* here we need to set the attrs lists for domain and result lookups */
 581         switch (format_desired) {
 582         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 583         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 584                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 585                 const char * const _result_attrs[] = { NULL};
 586
 587                 domain_attrs = _domain_attrs;
 588                 result_attrs = _result_attrs;
 589                 break;
 590         }
 591         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 592                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 593                 const char * const _result_attrs[] = { "canonicalName", NULL };
 594
 595                 domain_attrs = _domain_attrs;
 596                 result_attrs = _result_attrs;
 597                 break;
 598         }
 599         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 600                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 601                 const char * const _result_attrs[] = { "sAMAccountName", "objectSid", NULL};
 602
 603                 domain_attrs = _domain_attrs;
 604                 result_attrs = _result_attrs;
 605                 break;
 606         }
 607         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 608                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 609                 const char * const _result_attrs[] = { "objectGUID", NULL};
 610
 611                 domain_attrs = _domain_attrs;
 612                 result_attrs = _result_attrs;
 613                 break;
 614         }
 615         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 616                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 617                 const char * const _result_attrs[] = { "displayName", "samAccountName", NULL};
 618
 619                 domain_attrs = _domain_attrs;
 620                 result_attrs = _result_attrs;
 621                 break;
 622         }
 623         default:
 624                 return WERR_OK;
 625         }
 626
 627         if (domain_filter) {
 628                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 629                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 630                                        "%s", domain_filter);
 631         } else {
 632                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 633                                        "(ncName=%s)", ldb_dn_linearize(mem_ctx, samdb_base_dn(mem_ctx)));
 634         }
 635
 636         switch (ldb_ret) {
 637         case 1:
 638                 break;
 639         case 0:
 640                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 641                 return WERR_OK;
 642         case -1:
 643                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 644                 return WERR_OK;
 645         default:
 646                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 647                 return WERR_OK;
 648         }
 649
 650         info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 651         WERR_TALLOC_CHECK(info1->dns_domain_name);
 652         info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 653
 654         if (result_filter) {
 655                 result_basedn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 656
 657                 ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 658                                        result_attrs, "%s", result_filter);
 659         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 660                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 661                                           result_attrs);
 662         } else {
 663                 name_dn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 664                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 665                                           result_attrs);
 666         }
 667
 668         switch (ldb_ret) {
 669         case 1:
 670                 break;
 671         case 0:
 672                 switch (format_offered) {
 673                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 674                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 675                                                    smb_krb5_context,
 676                                                    format_flags, format_offered, format_desired,
 677                                                    name, info1);
 678
 679                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 680                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 681                                               format_flags, format_offered, format_desired,
 682                                               name, info1);
 683                 }
 684                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 685                 return WERR_OK;
 686         case -1:
 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         /* here we can use result_res[0] and domain_res[0] */
 695         switch (format_desired) {
 696         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 697                 info1->result_name      = ldb_dn_linearize(mem_ctx, result_res[0]->dn);
 698                 WERR_TALLOC_CHECK(info1->result_name);
 699
 700                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 701                 return WERR_OK;
 702         }
 703         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 704                 info1->result_name      = samdb_result_string(result_res[0], "canonicalName", NULL);
 705                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 706                 return WERR_OK;
 707         }
 708         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 709                 /* Not in the virtual ldb attribute */
 710                 return DsCrackNameOneSyntactical(mem_ctx,
 711                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 712                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 713                                                  result_res[0]->dn, name, info1);
 714         }
 715         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 716                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result_res[0], "objectSid");
 717                 const char *_acc = "", *_dom = "";
 718
 719                 if (!sid || (sid->num_auths < 4) || (sid->num_auths > 5)) {
 720                         info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 721                         return WERR_OK;
 722                 }
 723
 724                 if (sid->num_auths == 4) {
 725                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 726                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, result_res[0]->dn));
 727                         if (ldb_ret != 1) {
 728                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 729                                 return WERR_OK;
 730                         }
 731                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 732                         WERR_TALLOC_CHECK(_dom);
 733
 734                 } else if (sid->num_auths == 5) {
 735                         const char *attrs[] = { NULL };
 736                         struct ldb_message **domain_res2;
 737                         struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 738                         if (!dom_sid) {
 739                                 return WERR_OK;
 740                         }
 741                         dom_sid->num_auths--;
 742                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 743                                                "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 744                         if (ldb_ret != 1) {
 745                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 746                                 return WERR_OK;
 747                         }
 748                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res2, domain_attrs,
 749                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, domain_res[0]->dn));
 750                         if (ldb_ret != 1) {
 751                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 752                                 return WERR_OK;
 753                         }
 754
 755                         _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 756                         WERR_TALLOC_CHECK(_dom);
 757
 758                         _acc = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 759                         WERR_TALLOC_CHECK(_acc);
 760                 }
 761
 762                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 763                 WERR_TALLOC_CHECK(info1->result_name);
 764
 765                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 766                 return WERR_OK;
 767         }
 768         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 769                 struct GUID guid;
 770
 771                 guid = samdb_result_guid(result_res[0], "objectGUID");
 772
 773                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 774                 WERR_TALLOC_CHECK(info1->result_name);
 775
 776                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 777                 return WERR_OK;
 778         }
 779         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 780                 info1->result_name      = samdb_result_string(result_res[0], "displayName", NULL);
 781                 if (!info1->result_name) {
 782                         info1->result_name      = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 783                 }
 784                 if (!info1->result_name) {
 785                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 786                 } else {
 787                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 788                 }
 789                 return WERR_OK;
 790         }
 791         default:
 792                 return WERR_OK;
 793         }
 794
 795         return WERR_INVALID_PARAM;
 796 }
 797
 798 /* Given a user Principal Name (such as foo@bar.com),
 799  * return the user and domain DNs.  This is used in the KDC to then
 800  * return the Keys and evaluate policy */
 801
 802 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
 803                                    TALLOC_CTX *mem_ctx,
 804                                    const char *user_principal_name,
 805                                    struct ldb_dn **user_dn,
 806                                    struct ldb_dn **domain_dn)
 807 {
 808         WERROR werr;
 809         struct drsuapi_DsNameInfo1 info1;
 810         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 811                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 812                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 813                                   user_principal_name,
 814                                   &info1);
 815         if (!W_ERROR_IS_OK(werr)) {
 816                 return werror_to_ntstatus(werr);
 817         }
 818         switch (info1.status) {
 819         case DRSUAPI_DS_NAME_STATUS_OK:
 820                 break;
 821         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 822         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 823         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 824                 return NT_STATUS_NO_SUCH_USER;
 825         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 826         default:
 827                 return NT_STATUS_UNSUCCESSFUL;
 828         }
 829
 830         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 831
 832         if (domain_dn) {
 833                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 834                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 835                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 836                                           talloc_asprintf(mem_ctx, "%s/",
 837                                                           info1.dns_domain_name),
 838                                           &info1);
 839                 if (!W_ERROR_IS_OK(werr)) {
 840                         return werror_to_ntstatus(werr);
 841                 }
 842                 switch (info1.status) {
 843                 case DRSUAPI_DS_NAME_STATUS_OK:
 844                         break;
 845                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 846                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 847                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 848                         return NT_STATUS_NO_SUCH_USER;
 849                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 850                 default:
 851                         return NT_STATUS_UNSUCCESSFUL;
 852                 }
 853
 854                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 855         }
 856
 857         return NT_STATUS_OK;
 858
 859 }
 860
 861 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
 862  * return the user and domain DNs.  This is used in the KDC to then
 863  * return the Keys and evaluate policy */
 864
 865 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
 866                                       TALLOC_CTX *mem_ctx,
 867                                       const char *service_principal_name,
 868                                       struct ldb_dn **user_dn,
 869                                       struct ldb_dn **domain_dn)
 870 {
 871         WERROR werr;
 872         struct drsuapi_DsNameInfo1 info1;
 873         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 874                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 875                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 876                                   service_principal_name,
 877                                   &info1);
 878         if (!W_ERROR_IS_OK(werr)) {
 879                 return werror_to_ntstatus(werr);
 880         }
 881         switch (info1.status) {
 882         case DRSUAPI_DS_NAME_STATUS_OK:
 883                 break;
 884         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 885         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 886         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 887                 return NT_STATUS_NO_SUCH_USER;
 888         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 889         default:
 890                 return NT_STATUS_UNSUCCESSFUL;
 891         }
 892
 893         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 894
 895         if (domain_dn) {
 896                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 897                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 898                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 899                                           talloc_asprintf(mem_ctx, "%s/",
 900                                                           info1.dns_domain_name),
 901                                           &info1);
 902                 if (!W_ERROR_IS_OK(werr)) {
 903                         return werror_to_ntstatus(werr);
 904                 }
 905                 switch (info1.status) {
 906                 case DRSUAPI_DS_NAME_STATUS_OK:
 907                         break;
 908                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 909                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 910                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 911                         return NT_STATUS_NO_SUCH_USER;
 912                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 913                 default:
 914                         return NT_STATUS_UNSUCCESSFUL;
 915                 }
 916
 917                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 918         }
 919
 920         return NT_STATUS_OK;
 921
 922 }
 923
 924 NTSTATUS crack_dn_to_nt4_name(TALLOC_CTX *mem_ctx,
 925                               const char *dn,
 926                               const char **nt4_domain, const char **nt4_account)
 927 {
 928         WERROR werr;
 929         struct drsuapi_DsNameInfo1 info1;
 930         struct ldb_context *ldb;
 931         char *p;
 932
 933         /* Handle anonymous bind */
 934         if (!dn || !*dn) {
 935                 *nt4_domain = "";
 936                 *nt4_account = "";
 937                 return NT_STATUS_OK;
 938         }
 939
 940         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
 941         if (ldb == NULL) {
 942                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 943         }
 944
 945         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
 946                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 947                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
 948                                   dn,
 949                                   &info1);
 950         if (!W_ERROR_IS_OK(werr)) {
 951                 return werror_to_ntstatus(werr);
 952         }
 953         switch (info1.status) {
 954         case DRSUAPI_DS_NAME_STATUS_OK:
 955                 break;
 956         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 957         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 958         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 959                 return NT_STATUS_NO_SUCH_USER;
 960         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 961         default:
 962                 return NT_STATUS_UNSUCCESSFUL;
 963         }
 964
 965         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
 966
 967         p = strchr(*nt4_domain, '\\');
 968         if (!p) {
 969                 return NT_STATUS_INVALID_PARAMETER;
 970         }
 971         p[0] = '\0';
 972
 973         if (p[1]) {
 974                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
 975         }
 976
 977         if (!*nt4_account || !*nt4_domain) {
 978                 return NT_STATUS_NO_MEMORY;
 979         }
 980
 981         return NT_STATUS_OK;
 982
 983 }