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 "auth/auth.h"
  34 #include "db_wrap.h"
  35 #include "dsdb/samdb/samdb.h"
  36 #include "librpc/gen_ndr/ndr_security.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                                    const 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                                         const 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_string_compose(tmp_ctx, samdb_base_dn(tmp_ctx),
  73                                            "CN=Directory Service,CN=Windows NT"
  74                                            ",CN=Services,CN=Configuration");
  75         service_dn_str = ldb_dn_linearize(tmp_ctx, service_dn);
  76
  77         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
  78                          directory_attrs, &res);
  79
  80         if (ret != LDB_SUCCESS) {
  81                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
  82                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  83         } else if (res->count != 1) {
  84                 talloc_free(res);
  85                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
  86                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  87         }
  88         talloc_steal(tmp_ctx, res);
  89
  90         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
  91         if (!spnmappings || spnmappings->num_values == 0) {
  92                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
  93                 talloc_free(tmp_ctx);
  94                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  95         }
  96
  97         for (i = 0; i < spnmappings->num_values; i++) {
  98                 char *mapping, *p, *str;
  99                 mapping = talloc_strdup(tmp_ctx,
 100                                         (const char *)spnmappings->values[i].data);
 101                 if (!mapping) {
 102                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 103                         talloc_free(tmp_ctx);
 104                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 105                 }
 106
 107                 /* C string manipulation sucks */
 108
 109                 p = strchr(mapping, '=');
 110                 if (!p) {
 111                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 112                                   service_dn_str, mapping));
 113                         talloc_free(tmp_ctx);
 114                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 115                 }
 116                 p[0] = '\0';
 117                 p++;
 118                 do {
 119                         str = p;
 120                         p = strchr(p, ',');
 121                         if (p) {
 122                                 p[0] = '\0';
 123                                 p++;
 124                         }
 125                         if (strcasecmp(str, alias_from) == 0) {
 126                                 *alias_to = mapping;
 127                                 talloc_steal(mem_ctx, mapping);
 128                                 talloc_free(tmp_ctx);
 129                                 return DRSUAPI_DS_NAME_STATUS_OK;
 130                         }
 131                 } while (p);
 132         }
 133         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 134         talloc_free(tmp_ctx);
 135         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 136 }
 137
 138 /* When cracking a ServicePrincipalName, many services may be served
 139  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 140  * but we translate it here, and search on host/.  This is done after
 141  * the cifs/ entry has been searched for, making this a fallback */
 142
 143 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 144                                   struct smb_krb5_context *smb_krb5_context,
 145                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 146                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 147 {
 148         WERROR wret;
 149         krb5_error_code ret;
 150         krb5_principal principal;
 151         const char *service;
 152         char *new_service;
 153         char *new_princ;
 154         enum drsuapi_DsNameStatus namestatus;
 155
 156         /* parse principal */
 157         ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context,
 158                                       name, &principal);
 159         if (ret) {
 160                 DEBUG(2, ("Could not parse principal: %s: %s",
 161                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 162                                                            ret, mem_ctx)));
 163                 return WERR_NOMEM;
 164         }
 165
 166         /* grab cifs/, http/ etc */
 167
 168         /* This is checked for in callers, but be safe */
 169         if (principal->name.name_string.len < 2) {
 170                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 171                 return WERR_OK;
 172         }
 173         service = principal->name.name_string.val[0];
 174
 175         /* MAP it */
 176         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 177                                           sam_ctx, mem_ctx,
 178                                           service, &new_service);
 179
 180         if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 181                 info1->status = namestatus;
 182                 return WERR_OK;
 183         }
 184
 185         if (ret != 0) {
 186                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 187                 return WERR_OK;
 188         }
 189
 190         /* ooh, very nasty playing around in the Principal... */
 191         free(principal->name.name_string.val[0]);
 192         principal->name.name_string.val[0] = strdup(new_service);
 193         if (!principal->name.name_string.val[0]) {
 194                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 195                 return WERR_NOMEM;
 196         }
 197
 198         /* reform principal */
 199         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &new_princ);
 200
 201         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 202
 203         if (ret) {
 204                 return WERR_NOMEM;
 205         }
 206
 207         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 208                                   new_princ, info1);
 209         free(new_princ);
 210         return wret;
 211 }
 212
 213 /* Subcase of CrackNames, for the userPrincipalName */
 214
 215 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 216                              struct smb_krb5_context *smb_krb5_context,
 217                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 218                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 219 {
 220         WERROR status;
 221         const char *domain_filter = NULL;
 222         const char *result_filter = NULL;
 223         krb5_error_code ret;
 224         krb5_principal principal;
 225         char **realm;
 226         char *unparsed_name_short;
 227
 228         /* Prevent recursion */
 229         if (!name) {
 230                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 231                 return WERR_OK;
 232         }
 233
 234         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 235         if (ret) {
 236                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 237                 return WERR_OK;
 238         }
 239
 240         domain_filter = NULL;
 241         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 242         domain_filter = talloc_asprintf(mem_ctx,
 243                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 244                                         ldb_binary_encode_string(mem_ctx, *realm),
 245                                         ldb_binary_encode_string(mem_ctx, *realm));
 246         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 247         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 248
 249         if (ret) {
 250                 free(unparsed_name_short);
 251                 return WERR_NOMEM;
 252         }
 253
 254         /* This may need to be extended for more userPrincipalName variations */
 255         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 256                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 257         if (!result_filter || !domain_filter) {
 258                 free(unparsed_name_short);
 259                 return WERR_NOMEM;
 260         }
 261         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 262                                       smb_krb5_context,
 263                                       format_flags, format_offered, format_desired,
 264                                       NULL, unparsed_name_short, domain_filter, result_filter,
 265                                       info1);
 266         free(unparsed_name_short);
 267         return status;
 268 }
 269
 270 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 271
 272 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 273                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 274                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 275 {
 276         krb5_error_code ret;
 277         const char *domain_filter = NULL;
 278         const char *result_filter = NULL;
 279         struct ldb_dn *name_dn = NULL;
 280
 281         struct smb_krb5_context *smb_krb5_context;
 282         ret = smb_krb5_init_context(mem_ctx, &smb_krb5_context);
 283
 284         if (ret) {
 285                 return WERR_NOMEM;
 286         }
 287
 288         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 289         info1->dns_domain_name = NULL;
 290         info1->result_name = NULL;
 291
 292         if (!name) {
 293                 return WERR_INVALID_PARAM;
 294         }
 295
 296         /* TODO: - fill the correct names in all cases!
 297          *       - handle format_flags
 298          */
 299
 300         /* here we need to set the domain_filter and/or the result_filter */
 301         switch (format_offered) {
 302         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 303                 char *str;
 304
 305                 str = talloc_strdup(mem_ctx, name);
 306                 WERR_TALLOC_CHECK(str);
 307
 308                 if (strlen(str) == 0 || str[strlen(str)-1] != '/') {
 309                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 310                         return WERR_OK;
 311                 }
 312
 313                 str[strlen(str)-1] = '\0';
 314
 315                 domain_filter = talloc_asprintf(mem_ctx,
 316                                                 "(&(&(&(dnsRoot=%s)(objectclass=crossRef)))(nETBIOSName=*)(ncName=*))",
 317                                                 ldb_binary_encode_string(mem_ctx, str));
 318                 WERR_TALLOC_CHECK(domain_filter);
 319
 320                 break;
 321         }
 322         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 323                 char *p;
 324                 char *domain;
 325                 const char *account = NULL;
 326
 327                 domain = talloc_strdup(mem_ctx, name);
 328                 WERR_TALLOC_CHECK(domain);
 329
 330                 p = strchr(domain, '\\');
 331                 if (!p) {
 332                         /* invalid input format */
 333                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 334                         return WERR_OK;
 335                 }
 336                 p[0] = '\0';
 337
 338                 if (p[1]) {
 339                         account = &p[1];
 340                 }
 341
 342                 domain_filter = talloc_asprintf(mem_ctx,
 343                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 344                                                 ldb_binary_encode_string(mem_ctx, domain));
 345                 WERR_TALLOC_CHECK(domain_filter);
 346                 if (account) {
 347                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 348                                                         ldb_binary_encode_string(mem_ctx, account));
 349                         WERR_TALLOC_CHECK(result_filter);
 350                 }
 351
 352                 talloc_free(domain);
 353                 break;
 354         }
 355
 356                 /* A LDAP DN as a string */
 357         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 358                 name_dn = ldb_dn_explode(mem_ctx, name);
 359                 domain_filter = NULL;
 360                 if (!name_dn) {
 361                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 362                         return WERR_OK;
 363                 }
 364                 break;
 365         }
 366
 367                 /* A GUID as a string */
 368         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 369                 struct GUID guid;
 370                 char *ldap_guid;
 371                 NTSTATUS nt_status;
 372                 domain_filter = NULL;
 373
 374                 nt_status = GUID_from_string(name, &guid);
 375                 if (!NT_STATUS_IS_OK(nt_status)) {
 376                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 377                         return WERR_OK;
 378                 }
 379
 380                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 381                 if (!ldap_guid) {
 382                         return WERR_NOMEM;
 383                 }
 384                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 385                                                 ldap_guid);
 386                 WERR_TALLOC_CHECK(result_filter);
 387                 break;
 388         }
 389         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 390                 domain_filter = NULL;
 391
 392                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 393                                                 ldb_binary_encode_string(mem_ctx, name),
 394                                                 ldb_binary_encode_string(mem_ctx, name));
 395                 WERR_TALLOC_CHECK(result_filter);
 396                 break;
 397         }
 398
 399                 /* A S-1234-5678 style string */
 400         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 401                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 402                 char *ldap_sid;
 403
 404                 domain_filter = NULL;
 405                 if (!sid) {
 406                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 407                         return WERR_OK;
 408                 }
 409                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 410                                                    sid);
 411                 if (!ldap_sid) {
 412                         return WERR_NOMEM;
 413                 }
 414                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 415                                                 ldap_sid);
 416                 WERR_TALLOC_CHECK(result_filter);
 417                 break;
 418         }
 419         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 420                 krb5_principal principal;
 421                 char *unparsed_name;
 422                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 423                 if (ret) {
 424                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 425                         return WERR_OK;
 426                 }
 427
 428                 domain_filter = NULL;
 429
 430                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 431                 if (ret) {
 432                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 433                         return WERR_NOMEM;
 434                 }
 435
 436                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 437                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 438                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 439
 440                 free(unparsed_name);
 441                 WERR_TALLOC_CHECK(result_filter);
 442                 break;
 443         }
 444         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 445                 krb5_principal principal;
 446                 char *unparsed_name_short;
 447                 char *service;
 448                 ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context, name, &principal);
 449                 if (ret) {
 450                         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
 451                         char **realm;
 452                         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 453                         if (ret) {
 454                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 455                                 return WERR_OK;
 456                         }
 457
 458                         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
 459                         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 460
 461                         info1->dns_domain_name  = talloc_strdup(info1, *realm);
 462                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 463
 464                         WERR_TALLOC_CHECK(info1->dns_domain_name);
 465
 466                         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 467                         return WERR_OK;
 468
 469                 } else if (principal->name.name_string.len < 2) {
 470                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 471                         return WERR_OK;
 472                 }
 473
 474                 domain_filter = NULL;
 475
 476                 ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 477                 if (ret) {
 478                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 479                         return WERR_NOMEM;
 480                 }
 481
 482                 service = principal->name.name_string.val[0];
 483                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 484                         /* the 'cn' attribute is just the leading part of the name */
 485                         char *computer_name;
 486                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 487                                                       strcspn(principal->name.name_string.val[1], "."));
 488                         if (computer_name == NULL) {
 489                                 return WERR_NOMEM;
 490                         }
 491
 492                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 493                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 494                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 495                 } else {
 496                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 497                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 498                 }
 499                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 500                 free(unparsed_name_short);
 501                 WERR_TALLOC_CHECK(result_filter);
 502
 503                 break;
 504         }
 505         default: {
 506                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 507                 return WERR_OK;
 508         }
 509
 510         }
 511
 512         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 513                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 514                                                  name_dn, name, info1);
 515         }
 516
 517         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 518                                     smb_krb5_context,
 519                                     format_flags, format_offered, format_desired,
 520                                     name_dn, name,
 521                                     domain_filter, result_filter,
 522                                     info1);
 523 }
 524
 525 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 526  * (FQDN_1779) into a canoical name without actually searching the
 527  * database */
 528
 529 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 530                                         uint32_t format_offered, uint32_t format_desired,
 531                                         const struct ldb_dn *name_dn, const char *name,
 532                                         struct drsuapi_DsNameInfo1 *info1)
 533 {
 534         char *cracked;
 535         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 536                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 537                 return WERR_OK;
 538         }
 539
 540         switch (format_desired) {
 541         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 542                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 543                 break;
 544         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 545                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 546                 break;
 547         default:
 548                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 549                 return WERR_OK;
 550         }
 551         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 552         info1->result_name      = cracked;
 553         if (!cracked) {
 554                 return WERR_NOMEM;
 555         }
 556
 557         return WERR_OK;
 558 }
 559
 560 /* Given a filter for the domain, and one for the result, perform the
 561  * ldb search. The format offered and desired flags change the
 562  * behaviours, including what attributes to return.
 563  *
 564  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 565  */
 566
 567 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 568                                    struct smb_krb5_context *smb_krb5_context,
 569                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 570                                    const struct ldb_dn *name_dn, const char *name,
 571                                    const char *domain_filter, const char *result_filter,
 572                                    struct drsuapi_DsNameInfo1 *info1)
 573 {
 574         int ldb_ret;
 575         struct ldb_message **domain_res = NULL;
 576         const char * const *domain_attrs;
 577         const char * const *result_attrs;
 578         struct ldb_message **result_res = NULL;
 579         const struct ldb_dn *result_basedn;
 580
 581         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
 582         const char * const _result_attrs_null[] = { NULL };
 583
 584         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
 585         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
 586
 587         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 588         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", NULL};
 589
 590         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
 591         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
 592
 593         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
 594         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
 595
 596         /* here we need to set the attrs lists for domain and result lookups */
 597         switch (format_desired) {
 598         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 599         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 600                 domain_attrs = _domain_attrs_1779;
 601                 result_attrs = _result_attrs_null;
 602                 break;
 603         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 604                 domain_attrs = _domain_attrs_canonical;
 605                 result_attrs = _result_attrs_canonical;
 606                 break;
 607         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
 608                 domain_attrs = _domain_attrs_nt4;
 609                 result_attrs = _result_attrs_nt4;
 610                 break;
 611         case DRSUAPI_DS_NAME_FORMAT_GUID:
 612                 domain_attrs = _domain_attrs_guid;
 613                 result_attrs = _result_attrs_guid;
 614                 break;
 615         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:
 616                 domain_attrs = _domain_attrs_display;
 617                 result_attrs = _result_attrs_display;
 618                 break;
 619         default:
 620                 return WERR_OK;
 621         }
 622
 623         if (domain_filter) {
 624                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 625                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 626                                        "%s", domain_filter);
 627         } else {
 628                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 629                                        "(ncName=%s)", ldb_dn_linearize(mem_ctx, samdb_base_dn(mem_ctx)));
 630         }
 631
 632         switch (ldb_ret) {
 633         case 1:
 634                 break;
 635         case 0:
 636                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 637                 return WERR_OK;
 638         case -1:
 639                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 640                 return WERR_OK;
 641         default:
 642                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 643                 return WERR_OK;
 644         }
 645
 646         info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 647         WERR_TALLOC_CHECK(info1->dns_domain_name);
 648         info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 649
 650         if (result_filter) {
 651                 result_basedn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 652
 653                 ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 654                                        result_attrs, "%s", result_filter);
 655         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 656                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 657                                           result_attrs);
 658         } else {
 659                 name_dn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 660                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 661                                           result_attrs);
 662         }
 663
 664         switch (ldb_ret) {
 665         case 1:
 666                 break;
 667         case 0:
 668                 switch (format_offered) {
 669                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 670                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 671                                                    smb_krb5_context,
 672                                                    format_flags, format_offered, format_desired,
 673                                                    name, info1);
 674
 675                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 676                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 677                                               format_flags, format_offered, format_desired,
 678                                               name, info1);
 679                 }
 680                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 681                 return WERR_OK;
 682         case -1:
 683                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 684                 return WERR_OK;
 685         default:
 686                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 687                 return WERR_OK;
 688         }
 689
 690         /* here we can use result_res[0] and domain_res[0] */
 691         switch (format_desired) {
 692         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 693                 info1->result_name      = ldb_dn_linearize(mem_ctx, result_res[0]->dn);
 694                 WERR_TALLOC_CHECK(info1->result_name);
 695
 696                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 697                 return WERR_OK;
 698         }
 699         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 700                 info1->result_name      = samdb_result_string(result_res[0], "canonicalName", NULL);
 701                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 702                 return WERR_OK;
 703         }
 704         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 705                 /* Not in the virtual ldb attribute */
 706                 return DsCrackNameOneSyntactical(mem_ctx,
 707                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 708                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 709                                                  result_res[0]->dn, name, info1);
 710         }
 711         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 712                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result_res[0], "objectSid");
 713                 const char *_acc = "", *_dom = "";
 714
 715                 if (!sid || (sid->num_auths < 4) || (sid->num_auths > 5)) {
 716                         info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 717                         return WERR_OK;
 718                 }
 719
 720                 if (sid->num_auths == 4) {
 721                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 722                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, result_res[0]->dn));
 723                         if (ldb_ret != 1) {
 724                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 725                                 return WERR_OK;
 726                         }
 727                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 728                         WERR_TALLOC_CHECK(_dom);
 729
 730                 } else if (sid->num_auths == 5) {
 731                         const char *attrs[] = { NULL };
 732                         struct ldb_message **domain_res2;
 733                         struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 734                         if (!dom_sid) {
 735                                 return WERR_OK;
 736                         }
 737                         dom_sid->num_auths--;
 738                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 739                                                "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 740                         if (ldb_ret != 1) {
 741                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 742                                 return WERR_OK;
 743                         }
 744                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res2, domain_attrs,
 745                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, domain_res[0]->dn));
 746                         if (ldb_ret != 1) {
 747                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 748                                 return WERR_OK;
 749                         }
 750
 751                         _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 752                         WERR_TALLOC_CHECK(_dom);
 753
 754                         _acc = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 755                         WERR_TALLOC_CHECK(_acc);
 756                 }
 757
 758                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 759                 WERR_TALLOC_CHECK(info1->result_name);
 760
 761                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 762                 return WERR_OK;
 763         }
 764         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 765                 struct GUID guid;
 766
 767                 guid = samdb_result_guid(result_res[0], "objectGUID");
 768
 769                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 770                 WERR_TALLOC_CHECK(info1->result_name);
 771
 772                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 773                 return WERR_OK;
 774         }
 775         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 776                 info1->result_name      = samdb_result_string(result_res[0], "displayName", NULL);
 777                 if (!info1->result_name) {
 778                         info1->result_name      = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 779                 }
 780                 if (!info1->result_name) {
 781                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 782                 } else {
 783                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 784                 }
 785                 return WERR_OK;
 786         }
 787         default:
 788                 return WERR_OK;
 789         }
 790
 791         return WERR_INVALID_PARAM;
 792 }
 793
 794 /* Given a user Principal Name (such as foo@bar.com),
 795  * return the user and domain DNs.  This is used in the KDC to then
 796  * return the Keys and evaluate policy */
 797
 798 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
 799                                    TALLOC_CTX *mem_ctx,
 800                                    const char *user_principal_name,
 801                                    struct ldb_dn **user_dn,
 802                                    struct ldb_dn **domain_dn)
 803 {
 804         WERROR werr;
 805         struct drsuapi_DsNameInfo1 info1;
 806         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 807                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 808                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 809                                   user_principal_name,
 810                                   &info1);
 811         if (!W_ERROR_IS_OK(werr)) {
 812                 return werror_to_ntstatus(werr);
 813         }
 814         switch (info1.status) {
 815         case DRSUAPI_DS_NAME_STATUS_OK:
 816                 break;
 817         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 818         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 819         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 820                 return NT_STATUS_NO_SUCH_USER;
 821         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 822         default:
 823                 return NT_STATUS_UNSUCCESSFUL;
 824         }
 825
 826         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 827
 828         if (domain_dn) {
 829                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 830                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 831                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 832                                           talloc_asprintf(mem_ctx, "%s/",
 833                                                           info1.dns_domain_name),
 834                                           &info1);
 835                 if (!W_ERROR_IS_OK(werr)) {
 836                         return werror_to_ntstatus(werr);
 837                 }
 838                 switch (info1.status) {
 839                 case DRSUAPI_DS_NAME_STATUS_OK:
 840                         break;
 841                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 842                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 843                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 844                         return NT_STATUS_NO_SUCH_USER;
 845                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 846                 default:
 847                         return NT_STATUS_UNSUCCESSFUL;
 848                 }
 849
 850                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 851         }
 852
 853         return NT_STATUS_OK;
 854
 855 }
 856
 857 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
 858  * return the user and domain DNs.  This is used in the KDC to then
 859  * return the Keys and evaluate policy */
 860
 861 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
 862                                       TALLOC_CTX *mem_ctx,
 863                                       const char *service_principal_name,
 864                                       struct ldb_dn **user_dn,
 865                                       struct ldb_dn **domain_dn)
 866 {
 867         WERROR werr;
 868         struct drsuapi_DsNameInfo1 info1;
 869         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 870                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 871                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 872                                   service_principal_name,
 873                                   &info1);
 874         if (!W_ERROR_IS_OK(werr)) {
 875                 return werror_to_ntstatus(werr);
 876         }
 877         switch (info1.status) {
 878         case DRSUAPI_DS_NAME_STATUS_OK:
 879                 break;
 880         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 881         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 882         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 883                 return NT_STATUS_NO_SUCH_USER;
 884         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 885         default:
 886                 return NT_STATUS_UNSUCCESSFUL;
 887         }
 888
 889         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 890
 891         if (domain_dn) {
 892                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 893                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 894                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 895                                           talloc_asprintf(mem_ctx, "%s/",
 896                                                           info1.dns_domain_name),
 897                                           &info1);
 898                 if (!W_ERROR_IS_OK(werr)) {
 899                         return werror_to_ntstatus(werr);
 900                 }
 901                 switch (info1.status) {
 902                 case DRSUAPI_DS_NAME_STATUS_OK:
 903                         break;
 904                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 905                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 906                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 907                         return NT_STATUS_NO_SUCH_USER;
 908                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 909                 default:
 910                         return NT_STATUS_UNSUCCESSFUL;
 911                 }
 912
 913                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 914         }
 915
 916         return NT_STATUS_OK;
 917
 918 }
 919
 920 NTSTATUS crack_dn_to_nt4_name(TALLOC_CTX *mem_ctx,
 921                               const char *dn,
 922                               const char **nt4_domain, const char **nt4_account)
 923 {
 924         WERROR werr;
 925         struct drsuapi_DsNameInfo1 info1;
 926         struct ldb_context *ldb;
 927         char *p;
 928
 929         /* Handle anonymous bind */
 930         if (!dn || !*dn) {
 931                 *nt4_domain = "";
 932                 *nt4_account = "";
 933                 return NT_STATUS_OK;
 934         }
 935
 936         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
 937         if (ldb == NULL) {
 938                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 939         }
 940
 941         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
 942                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 943                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
 944                                   dn,
 945                                   &info1);
 946         if (!W_ERROR_IS_OK(werr)) {
 947                 return werror_to_ntstatus(werr);
 948         }
 949         switch (info1.status) {
 950         case DRSUAPI_DS_NAME_STATUS_OK:
 951                 break;
 952         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 953         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 954         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 955                 return NT_STATUS_NO_SUCH_USER;
 956         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 957         default:
 958                 return NT_STATUS_UNSUCCESSFUL;
 959         }
 960
 961         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
 962
 963         p = strchr(*nt4_domain, '\\');
 964         if (!p) {
 965                 return NT_STATUS_INVALID_PARAMETER;
 966         }
 967         p[0] = '\0';
 968
 969         if (p[1]) {
 970                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
 971         }
 972
 973         if (!*nt4_account || !*nt4_domain) {
 974                 return NT_STATUS_NO_MEMORY;
 975         }
 976
 977         return NT_STATUS_OK;
 978
 979 }