source4/dsdb/samdb/ldb_modules/acl.c

   1 /*
   2   ldb database library
   3
   4   Copyright (C) Simo Sorce 2006-2008
   5   Copyright (C) Nadezhda Ivanova 2009
   6   Copyright (C) Anatoliy Atanasov  2009
   7
   8   This program is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 3 of the License, or
  11   (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /*
  23  *  Name: ldb
  24  *
  25  *  Component: ldb ACL module
  26  *
  27  *  Description: Module that performs authorisation access checks based on the
  28  *               account's security context and the DACL of the object being polled.
  29  *               Only DACL checks implemented at this point
  30  *
  31  *  Authors: Nadezhda Ivanova, Anatoliy Atanasov
  32  */
  33
  34 #include "includes.h"
  35 #include "ldb_module.h"
  36 #include "auth/auth.h"
  37 #include "libcli/security/security.h"
  38 #include "dsdb/samdb/samdb.h"
  39 #include "librpc/gen_ndr/ndr_security.h"
  40 #include "param/param.h"
  41 #include "dsdb/samdb/ldb_modules/util.h"
  42 #include "lib/util/tsort.h"
  43 #include "system/kerberos.h"
  44 #include "auth/kerberos/kerberos.h"
  45
  46 struct extended_access_check_attribute {
  47         const char *oa_name;
  48         const uint32_t requires_rights;
  49 };
  50
  51 struct acl_private {
  52         bool acl_search;
  53         const char **password_attrs;
  54         void *cached_schema_ptr;
  55         uint64_t cached_schema_metadata_usn;
  56         uint64_t cached_schema_loaded_usn;
  57         const char **confidential_attrs;
  58 };
  59
  60 struct acl_context {
  61         struct ldb_module *module;
  62         struct ldb_request *req;
  63         bool am_system;
  64         bool am_administrator;
  65         bool modify_search;
  66         bool constructed_attrs;
  67         bool allowedAttributes;
  68         bool allowedAttributesEffective;
  69         bool allowedChildClasses;
  70         bool allowedChildClassesEffective;
  71         bool sDRightsEffective;
  72         bool userPassword;
  73         const char * const *attrs;
  74         struct dsdb_schema *schema;
  75 };
  76
  77 static int acl_module_init(struct ldb_module *module)
  78 {
  79         struct ldb_context *ldb;
  80         struct acl_private *data;
  81         int ret;
  82         unsigned int i, n, j;
  83         TALLOC_CTX *mem_ctx;
  84         static const char * const attrs[] = { "passwordAttribute", NULL };
  85         static const char * const secret_attrs[] = {
  86                 DSDB_SECRET_ATTRIBUTES
  87         };
  88         struct ldb_result *res;
  89         struct ldb_message *msg;
  90         struct ldb_message_element *password_attributes;
  91
  92         ldb = ldb_module_get_ctx(module);
  93
  94         ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
  95         if (ret != LDB_SUCCESS) {
  96                 ldb_debug(ldb, LDB_DEBUG_ERROR,
  97                           "acl_module_init: Unable to register control with rootdse!\n");
  98                 return ldb_operr(ldb);
  99         }
 100
 101         data = talloc_zero(module, struct acl_private);
 102         if (data == NULL) {
 103                 return ldb_oom(ldb);
 104         }
 105
 106         data->acl_search = lpcfg_parm_bool(ldb_get_opaque(ldb, "loadparm"),
 107                                         NULL, "acl", "search", true);
 108         ldb_module_set_private(module, data);
 109
 110         mem_ctx = talloc_new(module);
 111         if (!mem_ctx) {
 112                 return ldb_oom(ldb);
 113         }
 114
 115         ret = dsdb_module_search_dn(module, mem_ctx, &res,
 116                                     ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
 117                                     attrs,
 118                                     DSDB_FLAG_NEXT_MODULE |
 119                                     DSDB_FLAG_AS_SYSTEM,
 120                                     NULL);
 121         if (ret != LDB_SUCCESS) {
 122                 goto done;
 123         }
 124         if (res->count == 0) {
 125                 goto done;
 126         }
 127
 128         if (res->count > 1) {
 129                 talloc_free(mem_ctx);
 130                 return LDB_ERR_CONSTRAINT_VIOLATION;
 131         }
 132
 133         msg = res->msgs[0];
 134
 135         password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
 136         if (!password_attributes) {
 137                 goto done;
 138         }
 139         data->password_attrs = talloc_array(data, const char *,
 140                         password_attributes->num_values +
 141                         ARRAY_SIZE(secret_attrs) + 1);
 142         if (!data->password_attrs) {
 143                 talloc_free(mem_ctx);
 144                 return ldb_oom(ldb);
 145         }
 146
 147         n = 0;
 148         for (i=0; i < password_attributes->num_values; i++) {
 149                 data->password_attrs[n] = (const char *)password_attributes->values[i].data;
 150                 talloc_steal(data->password_attrs, password_attributes->values[i].data);
 151                 n++;
 152         }
 153
 154         for (i=0; i < ARRAY_SIZE(secret_attrs); i++) {
 155                 bool found = false;
 156
 157                 for (j=0; j < n; j++) {
 158                         if (strcasecmp(data->password_attrs[j], secret_attrs[i]) == 0) {
 159                                 found = true;
 160                                 break;
 161                         }
 162                 }
 163
 164                 if (found) {
 165                         continue;
 166                 }
 167
 168                 data->password_attrs[n] = talloc_strdup(data->password_attrs,
 169                                                         secret_attrs[i]);
 170                 if (data->password_attrs[n] == NULL) {
 171                         talloc_free(mem_ctx);
 172                         return ldb_oom(ldb);
 173                 }
 174                 n++;
 175         }
 176         data->password_attrs[n] = NULL;
 177
 178 done:
 179         talloc_free(mem_ctx);
 180         return ldb_next_init(module);
 181 }
 182
 183 static int acl_allowedAttributes(struct ldb_module *module,
 184                                  const struct dsdb_schema *schema,
 185                                  struct ldb_message *sd_msg,
 186                                  struct ldb_message *msg,
 187                                  struct acl_context *ac)
 188 {
 189         struct ldb_message_element *oc_el;
 190         struct ldb_context *ldb = ldb_module_get_ctx(module);
 191         TALLOC_CTX *mem_ctx;
 192         const char **attr_list;
 193         int i, ret;
 194
 195         /* If we don't have a schema yet, we can't do anything... */
 196         if (schema == NULL) {
 197                 ldb_asprintf_errstring(ldb, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
 198                 return LDB_ERR_OPERATIONS_ERROR;
 199         }
 200
 201         /* Must remove any existing attribute */
 202         if (ac->allowedAttributes) {
 203                 ldb_msg_remove_attr(msg, "allowedAttributes");
 204         }
 205
 206         mem_ctx = talloc_new(msg);
 207         if (!mem_ctx) {
 208                 return ldb_oom(ldb);
 209         }
 210
 211         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 212         attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
 213         if (!attr_list) {
 214                 ldb_asprintf_errstring(ldb, "acl: Failed to get list of attributes");
 215                 talloc_free(mem_ctx);
 216                 return LDB_ERR_OPERATIONS_ERROR;
 217         }
 218         if (ac->allowedAttributes) {
 219                 for (i=0; attr_list && attr_list[i]; i++) {
 220                         ldb_msg_add_string(msg, "allowedAttributes", attr_list[i]);
 221                 }
 222         }
 223         if (ac->allowedAttributesEffective) {
 224                 struct security_descriptor *sd;
 225                 struct dom_sid *sid = NULL;
 226                 struct ldb_control *as_system = ldb_request_get_control(ac->req,
 227                                                                         LDB_CONTROL_AS_SYSTEM_OID);
 228
 229                 if (as_system != NULL) {
 230                         as_system->critical = 0;
 231                 }
 232
 233                 ldb_msg_remove_attr(msg, "allowedAttributesEffective");
 234                 if (ac->am_system || as_system) {
 235                         for (i=0; attr_list && attr_list[i]; i++) {
 236                                 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
 237                         }
 238                         return LDB_SUCCESS;
 239                 }
 240
 241                 ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), mem_ctx, sd_msg, &sd);
 242
 243                 if (ret != LDB_SUCCESS) {
 244                         return ret;
 245                 }
 246
 247                 sid = samdb_result_dom_sid(mem_ctx, sd_msg, "objectSid");
 248                 for (i=0; attr_list && attr_list[i]; i++) {
 249                         const struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
 250                                                                                         attr_list[i]);
 251                         if (!attr) {
 252                                 return ldb_operr(ldb);
 253                         }
 254                         /* remove constructed attributes */
 255                         if (attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED
 256                             || attr->systemOnly
 257                             || (attr->linkID != 0 && attr->linkID % 2 != 0 )) {
 258                                 continue;
 259                         }
 260                         ret = acl_check_access_on_attribute(module,
 261                                                             msg,
 262                                                             sd,
 263                                                             sid,
 264                                                             SEC_ADS_WRITE_PROP,
 265                                                             attr);
 266                         if (ret == LDB_SUCCESS) {
 267                                 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
 268                         }
 269                 }
 270         }
 271         return LDB_SUCCESS;
 272 }
 273
 274 static int acl_childClasses(struct ldb_module *module,
 275                             const struct dsdb_schema *schema,
 276                             struct ldb_message *sd_msg,
 277                             struct ldb_message *msg,
 278                             const char *attrName)
 279 {
 280         struct ldb_message_element *oc_el;
 281         struct ldb_message_element *allowedClasses;
 282         const struct dsdb_class *sclass;
 283         unsigned int i, j;
 284         int ret;
 285
 286         /* If we don't have a schema yet, we can't do anything... */
 287         if (schema == NULL) {
 288                 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
 289                 return LDB_ERR_OPERATIONS_ERROR;
 290         }
 291
 292         /* Must remove any existing attribute, or else confusion reins */
 293         ldb_msg_remove_attr(msg, attrName);
 294         ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
 295         if (ret != LDB_SUCCESS) {
 296                 return ret;
 297         }
 298
 299         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 300
 301         for (i=0; oc_el && i < oc_el->num_values; i++) {
 302                 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
 303                 if (!sclass) {
 304                         /* We don't know this class?  what is going on? */
 305                         continue;
 306                 }
 307
 308                 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
 309                         ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
 310                 }
 311         }
 312         if (allowedClasses->num_values > 1) {
 313                 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
 314                 for (i=1 ; i < allowedClasses->num_values; i++) {
 315                         struct ldb_val *val1 = &allowedClasses->values[i-1];
 316                         struct ldb_val *val2 = &allowedClasses->values[i];
 317                         if (data_blob_cmp(val1, val2) == 0) {
 318                                 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof(struct ldb_val));
 319                                 allowedClasses->num_values--;
 320                                 i--;
 321                         }
 322                 }
 323         }
 324
 325         return LDB_SUCCESS;
 326 }
 327
 328 static int acl_check_access_on_class(struct ldb_module *module,
 329                                      const struct dsdb_schema *schema,
 330                                      TALLOC_CTX *mem_ctx,
 331                                      struct security_descriptor *sd,
 332                                      struct security_token *token,
 333                                      struct dom_sid *rp_sid,
 334                                      uint32_t access_mask,
 335                                      const char *class_name)
 336 {
 337         int ret;
 338         NTSTATUS status;
 339         uint32_t access_granted;
 340         struct object_tree *root = NULL;
 341         struct object_tree *new_node = NULL;
 342         const struct GUID *guid;
 343
 344         if (class_name != NULL) {
 345                 guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
 346                 if (!guid) {
 347                         DEBUG(10, ("acl_search: cannot find class %s\n",
 348                                    class_name));
 349                         goto fail;
 350                 }
 351                 if (!insert_in_object_tree(mem_ctx,
 352                                            guid, access_mask,
 353                                            &root, &new_node)) {
 354                         DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
 355                         goto fail;
 356                 }
 357         }
 358
 359         status = sec_access_check_ds(sd, token,
 360                                      access_mask,
 361                                      &access_granted,
 362                                      root,
 363                                      rp_sid);
 364         if (!NT_STATUS_IS_OK(status)) {
 365                 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 366         } else {
 367                 ret = LDB_SUCCESS;
 368         }
 369         return ret;
 370 fail:
 371         return ldb_operr(ldb_module_get_ctx(module));
 372 }
 373
 374 static int acl_childClassesEffective(struct ldb_module *module,
 375                                      const struct dsdb_schema *schema,
 376                                      struct ldb_message *sd_msg,
 377                                      struct ldb_message *msg,
 378                                      struct acl_context *ac)
 379 {
 380         struct ldb_message_element *oc_el;
 381         struct ldb_message_element *allowedClasses = NULL;
 382         const struct dsdb_class *sclass;
 383         struct security_descriptor *sd;
 384         struct ldb_control *as_system = ldb_request_get_control(ac->req,
 385                                                                 LDB_CONTROL_AS_SYSTEM_OID);
 386         struct dom_sid *sid = NULL;
 387         unsigned int i, j;
 388         int ret;
 389
 390         if (as_system != NULL) {
 391                 as_system->critical = 0;
 392         }
 393
 394         if (ac->am_system || as_system) {
 395                 return acl_childClasses(module, schema, sd_msg, msg, "allowedChildClassesEffective");
 396         }
 397
 398         /* If we don't have a schema yet, we can't do anything... */
 399         if (schema == NULL) {
 400                 ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
 401                 return LDB_ERR_OPERATIONS_ERROR;
 402         }
 403
 404         /* Must remove any existing attribute, or else confusion reins */
 405         ldb_msg_remove_attr(msg, "allowedChildClassesEffective");
 406
 407         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 408         ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), msg, sd_msg, &sd);
 409         if (ret != LDB_SUCCESS) {
 410                 return ret;
 411         }
 412
 413         sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
 414         for (i=0; oc_el && i < oc_el->num_values; i++) {
 415                 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
 416                 if (!sclass) {
 417                         /* We don't know this class?  what is going on? */
 418                         continue;
 419                 }
 420
 421                 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
 422                         ret = acl_check_access_on_class(module,
 423                                                         schema,
 424                                                         msg,
 425                                                         sd,
 426                                                         acl_user_token(module),
 427                                                         sid,
 428                                                         SEC_ADS_CREATE_CHILD,
 429                                                         sclass->possibleInferiors[j]);
 430                         if (ret == LDB_SUCCESS) {
 431                                 ldb_msg_add_string(msg, "allowedChildClassesEffective",
 432                                                    sclass->possibleInferiors[j]);
 433                         }
 434                 }
 435         }
 436         allowedClasses = ldb_msg_find_element(msg, "allowedChildClassesEffective");
 437         if (!allowedClasses) {
 438                 return LDB_SUCCESS;
 439         }
 440
 441         if (allowedClasses->num_values > 1) {
 442                 TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
 443                 for (i=1 ; i < allowedClasses->num_values; i++) {
 444                         struct ldb_val *val1 = &allowedClasses->values[i-1];
 445                         struct ldb_val *val2 = &allowedClasses->values[i];
 446                         if (data_blob_cmp(val1, val2) == 0) {
 447                                 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val));
 448                                 allowedClasses->num_values--;
 449                                 i--;
 450                         }
 451                 }
 452         }
 453         return LDB_SUCCESS;
 454 }
 455
 456 static int acl_sDRightsEffective(struct ldb_module *module,
 457                                  struct ldb_message *sd_msg,
 458                                  struct ldb_message *msg,
 459                                  struct acl_context *ac)
 460 {
 461         struct ldb_context *ldb = ldb_module_get_ctx(module);
 462         struct ldb_message_element *rightsEffective;
 463         int ret;
 464         struct security_descriptor *sd;
 465         struct ldb_control *as_system = ldb_request_get_control(ac->req,
 466                                                                 LDB_CONTROL_AS_SYSTEM_OID);
 467         struct dom_sid *sid = NULL;
 468         uint32_t flags = 0;
 469
 470         if (as_system != NULL) {
 471                 as_system->critical = 0;
 472         }
 473
 474         /* Must remove any existing attribute, or else confusion reins */
 475         ldb_msg_remove_attr(msg, "sDRightsEffective");
 476         ret = ldb_msg_add_empty(msg, "sDRightsEffective", 0, &rightsEffective);
 477         if (ret != LDB_SUCCESS) {
 478                 return ret;
 479         }
 480         if (ac->am_system || as_system) {
 481                 flags = SECINFO_OWNER | SECINFO_GROUP |  SECINFO_SACL |  SECINFO_DACL;
 482         }
 483         else {
 484                 const struct dsdb_attribute *attr;
 485
 486                 attr = dsdb_attribute_by_lDAPDisplayName(ac->schema,
 487                                                          "nTSecurityDescriptor");
 488                 if (attr == NULL) {
 489                         return ldb_operr(ldb);
 490                 }
 491
 492                 /* Get the security descriptor from the message */
 493                 ret = dsdb_get_sd_from_ldb_message(ldb, msg, sd_msg, &sd);
 494                 if (ret != LDB_SUCCESS) {
 495                         return ret;
 496                 }
 497                 sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
 498                 ret = acl_check_access_on_attribute(module,
 499                                                     msg,
 500                                                     sd,
 501                                                     sid,
 502                                                     SEC_STD_WRITE_OWNER,
 503                                                     attr);
 504                 if (ret == LDB_SUCCESS) {
 505                         flags |= SECINFO_OWNER | SECINFO_GROUP;
 506                 }
 507                 ret = acl_check_access_on_attribute(module,
 508                                                     msg,
 509                                                     sd,
 510                                                     sid,
 511                                                     SEC_STD_WRITE_DAC,
 512                                                     attr);
 513                 if (ret == LDB_SUCCESS) {
 514                         flags |= SECINFO_DACL;
 515                 }
 516                 ret = acl_check_access_on_attribute(module,
 517                                                     msg,
 518                                                     sd,
 519                                                     sid,
 520                                                     SEC_FLAG_SYSTEM_SECURITY,
 521                                                     attr);
 522                 if (ret == LDB_SUCCESS) {
 523                         flags |= SECINFO_SACL;
 524                 }
 525         }
 526         return samdb_msg_add_uint(ldb_module_get_ctx(module), msg, msg,
 527                                   "sDRightsEffective", flags);
 528 }
 529
 530 static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
 531                                   struct ldb_context *ldb,
 532                                   const char *spn_value,
 533                                   uint32_t userAccountControl,
 534                                   const char *samAccountName,
 535                                   const char *dnsHostName,
 536                                   const char *netbios_name,
 537                                   const char *ntds_guid)
 538 {
 539         int ret;
 540         krb5_context krb_ctx;
 541         krb5_error_code kerr;
 542         krb5_principal principal;
 543         char *instanceName;
 544         char *serviceType;
 545         char *serviceName;
 546         const char *forest_name = samdb_forest_name(ldb, mem_ctx);
 547         const char *base_domain = samdb_default_domain_name(ldb, mem_ctx);
 548         struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
 549                                                           struct loadparm_context);
 550         bool is_dc = (userAccountControl & UF_SERVER_TRUST_ACCOUNT) ||
 551                 (userAccountControl & UF_PARTIAL_SECRETS_ACCOUNT);
 552
 553         if (strcasecmp_m(spn_value, samAccountName) == 0) {
 554                 /* MacOS X sets this value, and setting an SPN of your
 555                  * own samAccountName is both pointless and safe */
 556                 return LDB_SUCCESS;
 557         }
 558
 559         kerr = smb_krb5_init_context_basic(mem_ctx,
 560                                            lp_ctx,
 561                                            &krb_ctx);
 562         if (kerr != 0) {
 563                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
 564                                  "Could not initialize kerberos context.");
 565         }
 566
 567         ret = krb5_parse_name(krb_ctx, spn_value, &principal);
 568         if (ret) {
 569                 krb5_free_context(krb_ctx);
 570                 return LDB_ERR_CONSTRAINT_VIOLATION;
 571         }
 572
 573         if (principal->name.name_string.len < 2) {
 574                 goto fail;
 575         }
 576
 577         instanceName = principal->name.name_string.val[1];
 578         serviceType = principal->name.name_string.val[0];
 579         if (principal->name.name_string.len == 3) {
 580                 serviceName = principal->name.name_string.val[2];
 581         } else {
 582                 serviceName = NULL;
 583         }
 584
 585         if (serviceName) {
 586                 if (!is_dc) {
 587                         goto fail;
 588                 }
 589                 if (strcasecmp(serviceType, "ldap") == 0) {
 590                         if (strcasecmp(serviceName, netbios_name) != 0 &&
 591                             strcasecmp(serviceName, forest_name) != 0) {
 592                                 goto fail;
 593                         }
 594
 595                 } else if (strcasecmp(serviceType, "gc") == 0) {
 596                         if (strcasecmp(serviceName, forest_name) != 0) {
 597                                 goto fail;
 598                         }
 599                 } else {
 600                         if (strcasecmp(serviceName, base_domain) != 0 &&
 601                             strcasecmp(serviceName, netbios_name) != 0) {
 602                                 goto fail;
 603                         }
 604                 }
 605         }
 606         /* instanceName can be samAccountName without $ or dnsHostName
 607          * or "ntds_guid._msdcs.forest_domain for DC objects */
 608         if (strlen(instanceName) == (strlen(samAccountName) - 1)
 609             && strncasecmp(instanceName, samAccountName, strlen(samAccountName) - 1) == 0) {
 610                 goto success;
 611         } else if (dnsHostName != NULL && strcasecmp(instanceName, dnsHostName) == 0) {
 612                 goto success;
 613         } else if (is_dc) {
 614                 const char *guid_str;
 615                 guid_str = talloc_asprintf(mem_ctx,"%s._msdcs.%s",
 616                                            ntds_guid,
 617                                            forest_name);
 618                 if (strcasecmp(instanceName, guid_str) == 0) {
 619                         goto success;
 620                 }
 621         }
 622
 623 fail:
 624         krb5_free_principal(krb_ctx, principal);
 625         krb5_free_context(krb_ctx);
 626         return LDB_ERR_CONSTRAINT_VIOLATION;
 627
 628 success:
 629         krb5_free_principal(krb_ctx, principal);
 630         krb5_free_context(krb_ctx);
 631         return LDB_SUCCESS;
 632 }
 633
 634 static int acl_check_spn(TALLOC_CTX *mem_ctx,
 635                          struct ldb_module *module,
 636                          struct ldb_request *req,
 637                          struct security_descriptor *sd,
 638                          struct dom_sid *sid,
 639                          const struct GUID *oc_guid,
 640                          const struct dsdb_attribute *attr)
 641 {
 642         int ret;
 643         unsigned int i;
 644         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 645         struct ldb_context *ldb = ldb_module_get_ctx(module);
 646         struct ldb_result *acl_res;
 647         struct ldb_result *netbios_res;
 648         struct ldb_message_element *el;
 649         struct ldb_dn *partitions_dn = samdb_partitions_dn(ldb, tmp_ctx);
 650         uint32_t userAccountControl;
 651         const char *samAccountName;
 652         const char *dnsHostName;
 653         const char *netbios_name;
 654         struct GUID ntds;
 655         char *ntds_guid = NULL;
 656
 657         static const char *acl_attrs[] = {
 658                 "samAccountName",
 659                 "dnsHostName",
 660                 "userAccountControl",
 661                 NULL
 662         };
 663         static const char *netbios_attrs[] = {
 664                 "nETBIOSName",
 665                 NULL
 666         };
 667
 668         /* if we have wp, we can do whatever we like */
 669         if (acl_check_access_on_attribute(module,
 670                                           tmp_ctx,
 671                                           sd,
 672                                           sid,
 673                                           SEC_ADS_WRITE_PROP,
 674                                           attr) == LDB_SUCCESS) {
 675                 talloc_free(tmp_ctx);
 676                 return LDB_SUCCESS;
 677         }
 678
 679         ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
 680                                        GUID_DRS_VALIDATE_SPN,
 681                                        SEC_ADS_SELF_WRITE,
 682                                        sid);
 683
 684         if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
 685                 dsdb_acl_debug(sd, acl_user_token(module),
 686                                req->op.mod.message->dn,
 687                                true,
 688                                10);
 689                 talloc_free(tmp_ctx);
 690                 return ret;
 691         }
 692
 693         ret = dsdb_module_search_dn(module, tmp_ctx,
 694                                     &acl_res, req->op.mod.message->dn,
 695                                     acl_attrs,
 696                                     DSDB_FLAG_NEXT_MODULE |
 697                                     DSDB_FLAG_AS_SYSTEM |
 698                                     DSDB_SEARCH_SHOW_RECYCLED,
 699                                     req);
 700         if (ret != LDB_SUCCESS) {
 701                 talloc_free(tmp_ctx);
 702                 return ret;
 703         }
 704
 705         userAccountControl = ldb_msg_find_attr_as_uint(acl_res->msgs[0], "userAccountControl", 0);
 706         dnsHostName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "dnsHostName", NULL);
 707         samAccountName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "samAccountName", NULL);
 708
 709         ret = dsdb_module_search(module, tmp_ctx,
 710                                  &netbios_res, partitions_dn,
 711                                  LDB_SCOPE_ONELEVEL,
 712                                  netbios_attrs,
 713                                  DSDB_FLAG_NEXT_MODULE |
 714                                  DSDB_FLAG_AS_SYSTEM,
 715                                  req,
 716                                  "(ncName=%s)",
 717                                  ldb_dn_get_linearized(ldb_get_default_basedn(ldb)));
 718
 719         netbios_name = ldb_msg_find_attr_as_string(netbios_res->msgs[0], "nETBIOSName", NULL);
 720
 721         el = ldb_msg_find_element(req->op.mod.message, "servicePrincipalName");
 722         if (!el) {
 723                 talloc_free(tmp_ctx);
 724                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
 725                                          "Error finding element for servicePrincipalName.");
 726         }
 727
 728         /* NTDSDSA objectGuid of object we are checking SPN for */
 729         if (userAccountControl & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
 730                 ret = dsdb_module_find_ntdsguid_for_computer(module, tmp_ctx,
 731                                                              req->op.mod.message->dn, &ntds, req);
 732                 if (ret != LDB_SUCCESS) {
 733                         ldb_asprintf_errstring(ldb, "Failed to find NTDSDSA objectGuid for %s: %s",
 734                                                ldb_dn_get_linearized(req->op.mod.message->dn),
 735                                                ldb_strerror(ret));
 736                         talloc_free(tmp_ctx);
 737                         return LDB_ERR_OPERATIONS_ERROR;
 738                 }
 739                 ntds_guid = GUID_string(tmp_ctx, &ntds);
 740         }
 741
 742         for (i=0; i < el->num_values; i++) {
 743                 ret = acl_validate_spn_value(tmp_ctx,
 744                                              ldb,
 745                                              (char *)el->values[i].data,
 746                                              userAccountControl,
 747                                              samAccountName,
 748                                              dnsHostName,
 749                                              netbios_name,
 750                                              ntds_guid);
 751                 if (ret != LDB_SUCCESS) {
 752                         talloc_free(tmp_ctx);
 753                         return ret;
 754                 }
 755         }
 756         talloc_free(tmp_ctx);
 757         return LDB_SUCCESS;
 758 }
 759
 760 static int acl_add(struct ldb_module *module, struct ldb_request *req)
 761 {
 762         int ret;
 763         struct ldb_dn *parent;
 764         struct ldb_context *ldb;
 765         const struct dsdb_schema *schema;
 766         struct ldb_message_element *oc_el;
 767         const struct GUID *guid;
 768         struct ldb_dn *nc_root;
 769         struct ldb_control *as_system;
 770
 771         if (ldb_dn_is_special(req->op.add.message->dn)) {
 772                 return ldb_next_request(module, req);
 773         }
 774
 775         as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
 776         if (as_system != NULL) {
 777                 as_system->critical = 0;
 778         }
 779
 780         if (dsdb_module_am_system(module) || as_system) {
 781                 return ldb_next_request(module, req);
 782         }
 783
 784         ldb = ldb_module_get_ctx(module);
 785
 786         parent = ldb_dn_get_parent(req, req->op.add.message->dn);
 787         if (parent == NULL) {
 788                 return ldb_oom(ldb);
 789         }
 790
 791         /* Creating an NC. There is probably something we should do here,
 792          * but we will establish that later */
 793
 794         ret = dsdb_find_nc_root(ldb, req, req->op.add.message->dn, &nc_root);
 795         if (ret != LDB_SUCCESS) {
 796                 return ret;
 797         }
 798         if (ldb_dn_compare(nc_root, req->op.add.message->dn) == 0) {
 799                 talloc_free(nc_root);
 800                 return ldb_next_request(module, req);
 801         }
 802         talloc_free(nc_root);
 803
 804         schema = dsdb_get_schema(ldb, req);
 805         if (!schema) {
 806                 return ldb_operr(ldb);
 807         }
 808
 809         oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
 810         if (!oc_el || oc_el->num_values == 0) {
 811                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
 812                                        "acl: unable to find objectClass on %s\n",
 813                                        ldb_dn_get_linearized(req->op.add.message->dn));
 814                 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
 815         }
 816
 817         guid = class_schemaid_guid_by_lDAPDisplayName(schema,
 818                                                       (char *)oc_el->values[oc_el->num_values-1].data);
 819         ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_CREATE_CHILD, guid, req);
 820         if (ret != LDB_SUCCESS) {
 821                 return ret;
 822         }
 823         return ldb_next_request(module, req);
 824 }
 825
 826 /* ckecks if modifications are allowed on "Member" attribute */
 827 static int acl_check_self_membership(TALLOC_CTX *mem_ctx,
 828                                      struct ldb_module *module,
 829                                      struct ldb_request *req,
 830                                      struct security_descriptor *sd,
 831                                      struct dom_sid *sid,
 832                                      const struct GUID *oc_guid,
 833                                      const struct dsdb_attribute *attr)
 834 {
 835         int ret;
 836         unsigned int i;
 837         struct ldb_context *ldb = ldb_module_get_ctx(module);
 838         struct ldb_dn *user_dn;
 839         struct ldb_message_element *member_el;
 840         /* if we have wp, we can do whatever we like */
 841         if (acl_check_access_on_attribute(module,
 842                                           mem_ctx,
 843                                           sd,
 844                                           sid,
 845                                           SEC_ADS_WRITE_PROP,
 846                                           attr) == LDB_SUCCESS) {
 847                 return LDB_SUCCESS;
 848         }
 849         /* if we are adding/deleting ourselves, check for self membership */
 850         ret = dsdb_find_dn_by_sid(ldb, mem_ctx,
 851                                   &acl_user_token(module)->sids[PRIMARY_USER_SID_INDEX],
 852                                   &user_dn);
 853         if (ret != LDB_SUCCESS) {
 854                 return ret;
 855         }
 856         member_el = ldb_msg_find_element(req->op.mod.message, "member");
 857         if (!member_el) {
 858                 return ldb_operr(ldb);
 859         }
 860         /* user can only remove oneself */
 861         if (member_el->num_values == 0) {
 862                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 863         }
 864         for (i = 0; i < member_el->num_values; i++) {
 865                 if (strcasecmp((const char *)member_el->values[i].data,
 866                                ldb_dn_get_extended_linearized(mem_ctx, user_dn, 1)) != 0) {
 867                         return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 868                 }
 869         }
 870         ret = acl_check_extended_right(mem_ctx, sd, acl_user_token(module),
 871                                        GUID_DRS_SELF_MEMBERSHIP,
 872                                        SEC_ADS_SELF_WRITE,
 873                                        sid);
 874         if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
 875                 dsdb_acl_debug(sd, acl_user_token(module),
 876                                req->op.mod.message->dn,
 877                                true,
 878                                10);
 879         }
 880         return ret;
 881 }
 882
 883 static int acl_check_password_rights(TALLOC_CTX *mem_ctx,
 884                                      struct ldb_module *module,
 885                                      struct ldb_request *req,
 886                                      struct security_descriptor *sd,
 887                                      struct dom_sid *sid,
 888                                      const struct GUID *oc_guid,
 889                                      bool userPassword)
 890 {
 891         int ret = LDB_SUCCESS;
 892         unsigned int del_attr_cnt = 0, add_attr_cnt = 0, rep_attr_cnt = 0;
 893         struct ldb_message_element *el;
 894         struct ldb_message *msg;
 895         const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
 896                                         "unicodePwd", "dBCSPwd", NULL }, **l;
 897         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 898
 899         msg = ldb_msg_copy_shallow(tmp_ctx, req->op.mod.message);
 900         if (msg == NULL) {
 901                 return ldb_module_oom(module);
 902         }
 903         for (l = passwordAttrs; *l != NULL; l++) {
 904                 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
 905                         continue;
 906                 }
 907
 908                 while ((el = ldb_msg_find_element(msg, *l)) != NULL) {
 909                         if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
 910                                 ++del_attr_cnt;
 911                         }
 912                         if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_ADD) {
 913                                 ++add_attr_cnt;
 914                         }
 915                         if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
 916                                 ++rep_attr_cnt;
 917                         }
 918                         ldb_msg_remove_element(msg, el);
 919                 }
 920         }
 921
 922         /* single deletes will be handled by the "password_hash" LDB module
 923          * later in the stack, so we let it though here */
 924         if ((del_attr_cnt > 0) && (add_attr_cnt == 0) && (rep_attr_cnt == 0)) {
 925                 talloc_free(tmp_ctx);
 926                 return LDB_SUCCESS;
 927         }
 928
 929         if (ldb_request_get_control(req,
 930                                     DSDB_CONTROL_PASSWORD_CHANGE_OID) != NULL) {
 931                 /* The "DSDB_CONTROL_PASSWORD_CHANGE_OID" control means that we
 932                  * have a user password change and not a set as the message
 933                  * looks like. In it's value blob it contains the NT and/or LM
 934                  * hash of the old password specified by the user.
 935                  * This control is used by the SAMR and "kpasswd" password
 936                  * change mechanisms. */
 937                 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
 938                                                GUID_DRS_USER_CHANGE_PASSWORD,
 939                                                SEC_ADS_CONTROL_ACCESS,
 940                                                sid);
 941         }
 942         else if (rep_attr_cnt > 0 || (add_attr_cnt != del_attr_cnt)) {
 943                 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
 944                                                GUID_DRS_FORCE_CHANGE_PASSWORD,
 945                                                SEC_ADS_CONTROL_ACCESS,
 946                                                sid);
 947         }
 948         else if (add_attr_cnt == 1 && del_attr_cnt == 1) {
 949                 ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
 950                                                GUID_DRS_USER_CHANGE_PASSWORD,
 951                                                SEC_ADS_CONTROL_ACCESS,
 952                                                sid);
 953                 /* Very strange, but we get constraint violation in this case */
 954                 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
 955                         ret = LDB_ERR_CONSTRAINT_VIOLATION;
 956                 }
 957         }
 958         if (ret != LDB_SUCCESS) {
 959                 dsdb_acl_debug(sd, acl_user_token(module),
 960                                req->op.mod.message->dn,
 961                                true,
 962                                10);
 963         }
 964         talloc_free(tmp_ctx);
 965         return ret;
 966 }
 967
 968 static const struct GUID *get_oc_guid_from_message(const struct dsdb_schema *schema,
 969                                                    struct ldb_message *msg)
 970 {
 971         struct ldb_message_element *oc_el;
 972         const struct dsdb_class *object_class;
 973
 974         oc_el = ldb_msg_find_element(msg, "objectClass");
 975         if (!oc_el) {
 976                 return NULL;
 977         }
 978
 979         object_class = dsdb_get_last_structural_class(schema, oc_el);
 980         if (object_class == NULL) {
 981                 return NULL;
 982         }
 983
 984         return &object_class->schemaIDGUID;
 985 }
 986
 987
 988 static int acl_modify(struct ldb_module *module, struct ldb_request *req)
 989 {
 990         int ret;
 991         struct ldb_context *ldb = ldb_module_get_ctx(module);
 992         const struct dsdb_schema *schema;
 993         unsigned int i;
 994         const struct GUID *guid;
 995         uint32_t access_granted;
 996         NTSTATUS status;
 997         struct ldb_result *acl_res;
 998         struct security_descriptor *sd;
 999         struct dom_sid *sid = NULL;
1000         struct ldb_control *as_system;
1001         bool userPassword;
1002         TALLOC_CTX *tmp_ctx;
1003         const struct ldb_message *msg = req->op.mod.message;
1004         static const char *acl_attrs[] = {
1005                 "nTSecurityDescriptor",
1006                 "objectClass",
1007                 "objectSid",
1008                 NULL
1009         };
1010
1011         if (ldb_dn_is_special(msg->dn)) {
1012                 return ldb_next_request(module, req);
1013         }
1014
1015         as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1016         if (as_system != NULL) {
1017                 as_system->critical = 0;
1018         }
1019
1020         /* Don't print this debug statement if elements[0].name is going to be NULL */
1021         if (msg->num_elements > 0) {
1022                 DEBUG(10, ("ldb:acl_modify: %s\n", msg->elements[0].name));
1023         }
1024         if (dsdb_module_am_system(module) || as_system) {
1025                 return ldb_next_request(module, req);
1026         }
1027
1028         tmp_ctx = talloc_new(req);
1029         if (tmp_ctx == NULL) {
1030                 return ldb_oom(ldb);
1031         }
1032
1033         ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res, msg->dn,
1034                                     acl_attrs,
1035                                     DSDB_FLAG_NEXT_MODULE |
1036                                     DSDB_FLAG_AS_SYSTEM |
1037                                     DSDB_SEARCH_SHOW_RECYCLED,
1038                                     req);
1039
1040         if (ret != LDB_SUCCESS) {
1041                 goto fail;
1042         }
1043
1044         userPassword = dsdb_user_password_support(module, req, req);
1045
1046         schema = dsdb_get_schema(ldb, tmp_ctx);
1047         if (!schema) {
1048                 talloc_free(tmp_ctx);
1049                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1050                                  "acl_modify: Error obtaining schema.");
1051         }
1052
1053         ret = dsdb_get_sd_from_ldb_message(ldb, tmp_ctx, acl_res->msgs[0], &sd);
1054         if (ret != LDB_SUCCESS) {
1055                 talloc_free(tmp_ctx);
1056                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1057                                  "acl_modify: Error retrieving security descriptor.");
1058         }
1059         /* Theoretically we pass the check if the object has no sd */
1060         if (!sd) {
1061                 goto success;
1062         }
1063
1064         guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1065         if (!guid) {
1066                 talloc_free(tmp_ctx);
1067                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1068                                  "acl_modify: Error retrieving object class GUID.");
1069         }
1070         sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
1071         for (i=0; i < msg->num_elements; i++) {
1072                 const struct ldb_message_element *el = &msg->elements[i];
1073                 const struct dsdb_attribute *attr;
1074
1075                 attr = dsdb_attribute_by_lDAPDisplayName(schema,
1076                                                          el->name);
1077
1078                 if (ldb_attr_cmp("nTSecurityDescriptor", el->name) == 0) {
1079                         uint32_t sd_flags = dsdb_request_sd_flags(req, NULL);
1080                         uint32_t access_mask = 0;
1081
1082                         if (sd_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
1083                                 access_mask |= SEC_STD_WRITE_OWNER;
1084                         }
1085                         if (sd_flags & SECINFO_DACL) {
1086                                 access_mask |= SEC_STD_WRITE_DAC;
1087                         }
1088                         if (sd_flags & SECINFO_SACL) {
1089                                 access_mask |= SEC_FLAG_SYSTEM_SECURITY;
1090                         }
1091
1092                         status = sec_access_check_ds(sd, acl_user_token(module),
1093                                              access_mask,
1094                                              &access_granted,
1095                                              NULL,
1096                                              sid);
1097
1098                         if (!NT_STATUS_IS_OK(status)) {
1099                                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1100                                                        "Object %s has no write dacl access\n",
1101                                                        ldb_dn_get_linearized(msg->dn));
1102                                 dsdb_acl_debug(sd,
1103                                                acl_user_token(module),
1104                                                msg->dn,
1105                                                true,
1106                                                10);
1107                                 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1108                                 goto fail;
1109                         }
1110                 } else if (ldb_attr_cmp("member", el->name) == 0) {
1111                         ret = acl_check_self_membership(tmp_ctx,
1112                                                         module,
1113                                                         req,
1114                                                         sd,
1115                                                         sid,
1116                                                         guid,
1117                                                         attr);
1118                         if (ret != LDB_SUCCESS) {
1119                                 goto fail;
1120                         }
1121                 } else if (ldb_attr_cmp("dBCSPwd", el->name) == 0) {
1122                         /* this one is not affected by any rights, we should let it through
1123                            so that passwords_hash returns the correct error */
1124                         continue;
1125                 } else if (ldb_attr_cmp("unicodePwd", el->name) == 0 ||
1126                            (userPassword && ldb_attr_cmp("userPassword", el->name) == 0) ||
1127                            ldb_attr_cmp("clearTextPassword", el->name) == 0) {
1128                         ret = acl_check_password_rights(tmp_ctx,
1129                                                         module,
1130                                                         req,
1131                                                         sd,
1132                                                         sid,
1133                                                         guid,
1134                                                         userPassword);
1135                         if (ret != LDB_SUCCESS) {
1136                                 goto fail;
1137                         }
1138                 } else if (ldb_attr_cmp("servicePrincipalName", el->name) == 0) {
1139                         ret = acl_check_spn(tmp_ctx,
1140                                             module,
1141                                             req,
1142                                             sd,
1143                                             sid,
1144                                             guid,
1145                                             attr);
1146                         if (ret != LDB_SUCCESS) {
1147                                 goto fail;
1148                         }
1149                 } else {
1150                         struct object_tree *root = NULL;
1151                         struct object_tree *new_node = NULL;
1152
1153                 /* This basic attribute existence check with the right errorcode
1154                  * is needed since this module is the first one which requests
1155                  * schema attribute information.
1156                  * The complete attribute checking is done in the
1157                  * "objectclass_attrs" module behind this one.
1158                  */
1159                         if (!attr) {
1160                                 ldb_asprintf_errstring(ldb, "acl_modify: attribute '%s' on entry '%s' was not found in the schema!",
1161                                                        el->name,
1162                                                ldb_dn_get_linearized(msg->dn));
1163                                 ret =  LDB_ERR_NO_SUCH_ATTRIBUTE;
1164                                 goto fail;
1165                         }
1166
1167                         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1168                                                    &root, &new_node)) {
1169                                 talloc_free(tmp_ctx);
1170                                 return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
1171                                                  "acl_modify: Error adding new node in object tree.");
1172                         }
1173
1174                         if (!insert_in_object_tree(tmp_ctx,
1175                                                    &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
1176                                                    &new_node, &new_node)) {
1177                                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1178                                                        "acl_modify: cannot add to object tree securityGUID\n");
1179                                 ret = LDB_ERR_OPERATIONS_ERROR;
1180                                 goto fail;
1181                         }
1182
1183                         if (!insert_in_object_tree(tmp_ctx,
1184                                                    &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
1185                                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1186                                                        "acl_modify: cannot add to object tree attributeGUID\n");
1187                                 ret = LDB_ERR_OPERATIONS_ERROR;
1188                                 goto fail;
1189                         }
1190
1191                         status = sec_access_check_ds(sd, acl_user_token(module),
1192                                                      SEC_ADS_WRITE_PROP,
1193                                                      &access_granted,
1194                                                      root,
1195                                                      sid);
1196                         if (!NT_STATUS_IS_OK(status)) {
1197                                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1198                                                        "Object %s has no write property access\n",
1199                                                        ldb_dn_get_linearized(msg->dn));
1200                                 dsdb_acl_debug(sd,
1201                                                acl_user_token(module),
1202                                                msg->dn,
1203                                                true,
1204                                                10);
1205                                 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1206                                 goto fail;
1207                         }
1208                 }
1209         }
1210
1211 success:
1212         talloc_free(tmp_ctx);
1213         return ldb_next_request(module, req);
1214 fail:
1215         talloc_free(tmp_ctx);
1216         return ret;
1217 }
1218
1219 /* similar to the modify for the time being.
1220  * We need to consider the special delete tree case, though - TODO */
1221 static int acl_delete(struct ldb_module *module, struct ldb_request *req)
1222 {
1223         int ret;
1224         struct ldb_dn *parent;
1225         struct ldb_context *ldb;
1226         struct ldb_dn *nc_root;
1227         struct ldb_control *as_system;
1228
1229         if (ldb_dn_is_special(req->op.del.dn)) {
1230                 return ldb_next_request(module, req);
1231         }
1232
1233         as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1234         if (as_system != NULL) {
1235                 as_system->critical = 0;
1236         }
1237
1238         if (dsdb_module_am_system(module) || as_system) {
1239                 return ldb_next_request(module, req);
1240         }
1241
1242         DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req->op.del.dn)));
1243
1244         ldb = ldb_module_get_ctx(module);
1245
1246         parent = ldb_dn_get_parent(req, req->op.del.dn);
1247         if (parent == NULL) {
1248                 return ldb_oom(ldb);
1249         }
1250
1251         /* Make sure we aren't deleting a NC */
1252
1253         ret = dsdb_find_nc_root(ldb, req, req->op.del.dn, &nc_root);
1254         if (ret != LDB_SUCCESS) {
1255                 return ret;
1256         }
1257         if (ldb_dn_compare(nc_root, req->op.del.dn) == 0) {
1258                 talloc_free(nc_root);
1259                 DEBUG(10,("acl:deleting a NC\n"));
1260                 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1261                 return ldb_module_done(req, NULL, NULL,
1262                                        LDB_ERR_UNWILLING_TO_PERFORM);
1263         }
1264         talloc_free(nc_root);
1265
1266         if (ldb_request_get_control(req, LDB_CONTROL_TREE_DELETE_OID)) {
1267                 ret = dsdb_module_check_access_on_dn(module, req,
1268                                                      req->op.del.dn,
1269                                                      SEC_ADS_DELETE_TREE, NULL,
1270                                                      req);
1271                 if (ret != LDB_SUCCESS) {
1272                         return ret;
1273                 }
1274
1275                 return ldb_next_request(module, req);
1276         }
1277
1278         /* First check if we have delete object right */
1279         ret = dsdb_module_check_access_on_dn(module, req, req->op.del.dn,
1280                                              SEC_STD_DELETE, NULL, req);
1281         if (ret == LDB_SUCCESS) {
1282                 return ldb_next_request(module, req);
1283         }
1284
1285         /* Nope, we don't have delete object. Lets check if we have delete
1286          * child on the parent */
1287         ret = dsdb_module_check_access_on_dn(module, req, parent,
1288                                              SEC_ADS_DELETE_CHILD, NULL, req);
1289         if (ret != LDB_SUCCESS) {
1290                 return ret;
1291         }
1292
1293         return ldb_next_request(module, req);
1294 }
1295
1296 static int acl_rename(struct ldb_module *module, struct ldb_request *req)
1297 {
1298         int ret;
1299         struct ldb_dn *oldparent;
1300         struct ldb_dn *newparent;
1301         const struct dsdb_schema *schema;
1302         struct ldb_context *ldb;
1303         struct security_descriptor *sd = NULL;
1304         struct dom_sid *sid = NULL;
1305         struct ldb_result *acl_res;
1306         const struct GUID *guid;
1307         struct ldb_dn *nc_root;
1308         struct object_tree *root = NULL;
1309         struct object_tree *new_node = NULL;
1310         struct ldb_control *as_system;
1311         TALLOC_CTX *tmp_ctx;
1312         NTSTATUS status;
1313         uint32_t access_granted;
1314         const char *rdn_name;
1315         static const char *acl_attrs[] = {
1316                 "nTSecurityDescriptor",
1317                 "objectClass",
1318                 "objectSid",
1319                 NULL
1320         };
1321
1322         if (ldb_dn_is_special(req->op.rename.olddn)) {
1323                 return ldb_next_request(module, req);
1324         }
1325
1326         as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1327         if (as_system != NULL) {
1328                 as_system->critical = 0;
1329         }
1330
1331         DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)));
1332         if (dsdb_module_am_system(module) || as_system) {
1333                 return ldb_next_request(module, req);
1334         }
1335
1336         ldb = ldb_module_get_ctx(module);
1337
1338         tmp_ctx = talloc_new(req);
1339         if (tmp_ctx == NULL) {
1340                 return ldb_oom(ldb);
1341         }
1342
1343         oldparent = ldb_dn_get_parent(tmp_ctx, req->op.rename.olddn);
1344         if (oldparent == NULL) {
1345                 return ldb_oom(ldb);
1346         }
1347         newparent = ldb_dn_get_parent(tmp_ctx, req->op.rename.newdn);
1348         if (newparent == NULL) {
1349                 return ldb_oom(ldb);
1350         }
1351
1352         /* Make sure we aren't renaming/moving a NC */
1353
1354         ret = dsdb_find_nc_root(ldb, req, req->op.rename.olddn, &nc_root);
1355         if (ret != LDB_SUCCESS) {
1356                 return ret;
1357         }
1358         if (ldb_dn_compare(nc_root, req->op.rename.olddn) == 0) {
1359                 talloc_free(nc_root);
1360                 DEBUG(10,("acl:renaming/moving a NC\n"));
1361                 /* Windows returns "ERR_UNWILLING_TO_PERFORM */
1362                 return ldb_module_done(req, NULL, NULL,
1363                                        LDB_ERR_UNWILLING_TO_PERFORM);
1364         }
1365         talloc_free(nc_root);
1366
1367         /* Look for the parent */
1368
1369         ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res,
1370                                     req->op.rename.olddn, acl_attrs,
1371                                     DSDB_FLAG_NEXT_MODULE |
1372                                     DSDB_FLAG_AS_SYSTEM |
1373                                     DSDB_SEARCH_SHOW_RECYCLED, req);
1374         /* we sould be able to find the parent */
1375         if (ret != LDB_SUCCESS) {
1376                 DEBUG(10,("acl: failed to find object %s\n",
1377                           ldb_dn_get_linearized(req->op.rename.olddn)));
1378                 talloc_free(tmp_ctx);
1379                 return ret;
1380         }
1381
1382         schema = dsdb_get_schema(ldb, acl_res);
1383         if (!schema) {
1384                 talloc_free(tmp_ctx);
1385                 return ldb_operr(ldb);
1386         }
1387
1388         guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1389         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1390                                    &root, &new_node)) {
1391                 talloc_free(tmp_ctx);
1392                 return ldb_operr(ldb);
1393         };
1394
1395         guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
1396                                                           "name");
1397         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1398                                    &new_node, &new_node)) {
1399                 talloc_free(tmp_ctx);
1400                 return ldb_operr(ldb);
1401         };
1402
1403         rdn_name = ldb_dn_get_rdn_name(req->op.rename.olddn);
1404         if (rdn_name == NULL) {
1405                 talloc_free(tmp_ctx);
1406                 return ldb_operr(ldb);
1407         }
1408         guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
1409                                                           rdn_name);
1410         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
1411                                    &new_node, &new_node)) {
1412                 talloc_free(tmp_ctx);
1413                 return ldb_operr(ldb);
1414         };
1415
1416         ret = dsdb_get_sd_from_ldb_message(ldb, req, acl_res->msgs[0], &sd);
1417
1418         if (ret != LDB_SUCCESS) {
1419                 talloc_free(tmp_ctx);
1420                 return ldb_operr(ldb);
1421         }
1422         /* Theoretically we pass the check if the object has no sd */
1423         if (!sd) {
1424                 talloc_free(tmp_ctx);
1425                 return LDB_SUCCESS;
1426         }
1427         sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
1428         status = sec_access_check_ds(sd, acl_user_token(module),
1429                                      SEC_ADS_WRITE_PROP,
1430                                      &access_granted,
1431                                      root,
1432                                      sid);
1433
1434         if (!NT_STATUS_IS_OK(status)) {
1435                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1436                                        "Object %s has no wp on name\n",
1437                                        ldb_dn_get_linearized(req->op.rename.olddn));
1438                 dsdb_acl_debug(sd,
1439                           acl_user_token(module),
1440                           req->op.rename.olddn,
1441                           true,
1442                           10);
1443                 talloc_free(tmp_ctx);
1444                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1445         }
1446
1447         if (ldb_dn_compare(oldparent, newparent) == 0) {
1448                 /* regular rename, not move, nothing more to do */
1449                 talloc_free(tmp_ctx);
1450                 return ldb_next_request(module, req);
1451         }
1452
1453         /* new parent should have create child */
1454         root = NULL;
1455         new_node = NULL;
1456         guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
1457         if (!guid) {
1458                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1459                                        "acl:renamed object has no object class\n");
1460                 talloc_free(tmp_ctx);
1461                 return ldb_module_done(req, NULL, NULL,  LDB_ERR_OPERATIONS_ERROR);
1462         }
1463
1464         ret = dsdb_module_check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, guid, req);
1465         if (ret != LDB_SUCCESS) {
1466                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1467                                        "acl:access_denied renaming %s",
1468                                        ldb_dn_get_linearized(req->op.rename.olddn));
1469                 talloc_free(tmp_ctx);
1470                 return ret;
1471         }
1472         /* do we have delete object on the object? */
1473
1474         status = sec_access_check_ds(sd, acl_user_token(module),
1475                                      SEC_STD_DELETE,
1476                                      &access_granted,
1477                                      NULL,
1478                                      sid);
1479
1480         if (NT_STATUS_IS_OK(status)) {
1481                 talloc_free(tmp_ctx);
1482                 return ldb_next_request(module, req);
1483         }
1484         /* what about delete child on the current parent */
1485         ret = dsdb_module_check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL, req);
1486         if (ret != LDB_SUCCESS) {
1487                 ldb_asprintf_errstring(ldb_module_get_ctx(module),
1488                                        "acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn));
1489                 talloc_free(tmp_ctx);
1490                 return ldb_module_done(req, NULL, NULL, ret);
1491         }
1492
1493         talloc_free(tmp_ctx);
1494
1495         return ldb_next_request(module, req);
1496 }
1497
1498 static int acl_search_update_confidential_attrs(struct acl_context *ac,
1499                                                 struct acl_private *data)
1500 {
1501         struct dsdb_attribute *a;
1502         uint32_t n = 0;
1503
1504         if (data->acl_search) {
1505                 /*
1506                  * If acl:search is activated, the acl_read module
1507                  * protects confidential attributes.
1508                  */
1509                 return LDB_SUCCESS;
1510         }
1511
1512         if ((ac->schema == data->cached_schema_ptr) &&
1513             (ac->schema->loaded_usn == data->cached_schema_loaded_usn) &&
1514             (ac->schema->metadata_usn == data->cached_schema_metadata_usn))
1515         {
1516                 return LDB_SUCCESS;
1517         }
1518
1519         data->cached_schema_ptr = NULL;
1520         data->cached_schema_loaded_usn = 0;
1521         data->cached_schema_metadata_usn = 0;
1522         TALLOC_FREE(data->confidential_attrs);
1523
1524         if (ac->schema == NULL) {
1525                 return LDB_SUCCESS;
1526         }
1527
1528         for (a = ac->schema->attributes; a; a = a->next) {
1529                 const char **attrs = data->confidential_attrs;
1530
1531                 if (!(a->searchFlags & SEARCH_FLAG_CONFIDENTIAL)) {
1532                         continue;
1533                 }
1534
1535                 attrs = talloc_realloc(data, attrs, const char *, n + 2);
1536                 if (attrs == NULL) {
1537                         TALLOC_FREE(data->confidential_attrs);
1538                         return ldb_module_oom(ac->module);
1539                 }
1540
1541                 attrs[n] = a->lDAPDisplayName;
1542                 attrs[n+1] = NULL;
1543                 n++;
1544
1545                 data->confidential_attrs = attrs;
1546         }
1547
1548         data->cached_schema_ptr = ac->schema;
1549         data->cached_schema_loaded_usn = ac->schema->loaded_usn;
1550         data->cached_schema_metadata_usn = ac->schema->metadata_usn;
1551
1552         return LDB_SUCCESS;
1553 }
1554
1555 static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
1556 {
1557         struct acl_context *ac;
1558         struct acl_private *data;
1559         struct ldb_result *acl_res;
1560         static const char *acl_attrs[] = {
1561                 "objectClass",
1562                 "nTSecurityDescriptor",
1563                 "objectSid",
1564                 NULL
1565         };
1566         int ret;
1567         unsigned int i;
1568
1569         ac = talloc_get_type(req->context, struct acl_context);
1570         data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
1571         if (!ares) {
1572                 return ldb_module_done(ac->req, NULL, NULL,
1573                                        LDB_ERR_OPERATIONS_ERROR);
1574         }
1575         if (ares->error != LDB_SUCCESS) {
1576                 return ldb_module_done(ac->req, ares->controls,
1577                                        ares->response, ares->error);
1578         }
1579
1580         switch (ares->type) {
1581         case LDB_REPLY_ENTRY:
1582                 if (ac->constructed_attrs) {
1583                         ret = dsdb_module_search_dn(ac->module, ac, &acl_res, ares->message->dn,
1584                                                     acl_attrs,
1585                                                     DSDB_FLAG_NEXT_MODULE |
1586                                                     DSDB_FLAG_AS_SYSTEM |
1587                                                     DSDB_SEARCH_SHOW_RECYCLED,
1588                                                     req);
1589                         if (ret != LDB_SUCCESS) {
1590                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1591                         }
1592                 }
1593
1594                 if (ac->allowedAttributes || ac->allowedAttributesEffective) {
1595                         ret = acl_allowedAttributes(ac->module, ac->schema,
1596                                                     acl_res->msgs[0],
1597                                                     ares->message, ac);
1598                         if (ret != LDB_SUCCESS) {
1599                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1600                         }
1601                 }
1602
1603                 if (ac->allowedChildClasses) {
1604                         ret = acl_childClasses(ac->module, ac->schema,
1605                                                acl_res->msgs[0],
1606                                                ares->message,
1607                                                "allowedChildClasses");
1608                         if (ret != LDB_SUCCESS) {
1609                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1610                         }
1611                 }
1612
1613                 if (ac->allowedChildClassesEffective) {
1614                         ret = acl_childClassesEffective(ac->module, ac->schema,
1615                                                         acl_res->msgs[0],
1616                                                         ares->message, ac);
1617                         if (ret != LDB_SUCCESS) {
1618                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1619                         }
1620                 }
1621
1622                 if (ac->sDRightsEffective) {
1623                         ret = acl_sDRightsEffective(ac->module,
1624                                                     acl_res->msgs[0],
1625                                                     ares->message, ac);
1626                         if (ret != LDB_SUCCESS) {
1627                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1628                         }
1629                 }
1630
1631                 if (data == NULL) {
1632                         return ldb_module_send_entry(ac->req, ares->message,
1633                                                      ares->controls);
1634                 }
1635
1636                 if (ac->am_system) {
1637                         return ldb_module_send_entry(ac->req, ares->message,
1638                                                      ares->controls);
1639                 }
1640
1641                 if (data->password_attrs != NULL) {
1642                         for (i = 0; data->password_attrs[i]; i++) {
1643                                 if ((!ac->userPassword) &&
1644                                     (ldb_attr_cmp(data->password_attrs[i],
1645                                                   "userPassword") == 0))
1646                                 {
1647                                                 continue;
1648                                 }
1649
1650                                 ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
1651                         }
1652                 }
1653
1654                 if (ac->am_administrator) {
1655                         return ldb_module_send_entry(ac->req, ares->message,
1656                                                      ares->controls);
1657                 }
1658
1659                 ret = acl_search_update_confidential_attrs(ac, data);
1660                 if (ret != LDB_SUCCESS) {
1661                         return ret;
1662                 }
1663
1664                 if (data->confidential_attrs != NULL) {
1665                         for (i = 0; data->confidential_attrs[i]; i++) {
1666                                 ldb_msg_remove_attr(ares->message,
1667                                                     data->confidential_attrs[i]);
1668                         }
1669                 }
1670
1671                 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
1672
1673         case LDB_REPLY_REFERRAL:
1674                 return ldb_module_send_referral(ac->req, ares->referral);
1675
1676         case LDB_REPLY_DONE:
1677                 return ldb_module_done(ac->req, ares->controls,
1678                                        ares->response, LDB_SUCCESS);
1679
1680         }
1681         return LDB_SUCCESS;
1682 }
1683
1684 static int acl_search(struct ldb_module *module, struct ldb_request *req)
1685 {
1686         struct ldb_context *ldb;
1687         struct acl_context *ac;
1688         struct ldb_parse_tree *down_tree;
1689         struct ldb_request *down_req;
1690         struct acl_private *data;
1691         int ret;
1692         unsigned int i;
1693
1694         if (ldb_dn_is_special(req->op.search.base)) {
1695                 return ldb_next_request(module, req);
1696         }
1697
1698         ldb = ldb_module_get_ctx(module);
1699
1700         ac = talloc_zero(req, struct acl_context);
1701         if (ac == NULL) {
1702                 return ldb_oom(ldb);
1703         }
1704         data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
1705
1706         ac->module = module;
1707         ac->req = req;
1708         ac->am_system = dsdb_module_am_system(module);
1709         ac->am_administrator = dsdb_module_am_administrator(module);
1710         ac->constructed_attrs = false;
1711         ac->modify_search = true;
1712         ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
1713         ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
1714         ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
1715         ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
1716         ac->sDRightsEffective = ldb_attr_in_list(req->op.search.attrs, "sDRightsEffective");
1717         ac->userPassword = true;
1718         ac->schema = dsdb_get_schema(ldb, ac);
1719
1720         ac->constructed_attrs |= ac->allowedAttributes;
1721         ac->constructed_attrs |= ac->allowedChildClasses;
1722         ac->constructed_attrs |= ac->allowedChildClassesEffective;
1723         ac->constructed_attrs |= ac->allowedAttributesEffective;
1724         ac->constructed_attrs |= ac->sDRightsEffective;
1725
1726         if (data == NULL) {
1727                 ac->modify_search = false;
1728         }
1729         if (ac->am_system) {
1730                 ac->modify_search = false;
1731         }
1732
1733         if (!ac->constructed_attrs && !ac->modify_search) {
1734                 talloc_free(ac);
1735                 return ldb_next_request(module, req);
1736         }
1737
1738         if (!ac->am_system) {
1739                 ac->userPassword = dsdb_user_password_support(module, ac, req);
1740         }
1741
1742         ret = acl_search_update_confidential_attrs(ac, data);
1743         if (ret != LDB_SUCCESS) {
1744                 return ret;
1745         }
1746
1747         down_tree = ldb_parse_tree_copy_shallow(ac, req->op.search.tree);
1748         if (down_tree == NULL) {
1749                 return ldb_oom(ldb);
1750         }
1751
1752         if (!ac->am_system && data->password_attrs) {
1753                 for (i = 0; data->password_attrs[i]; i++) {
1754                         if ((!ac->userPassword) &&
1755                             (ldb_attr_cmp(data->password_attrs[i],
1756                                           "userPassword") == 0))
1757                         {
1758                                 continue;
1759                         }
1760
1761                         ldb_parse_tree_attr_replace(down_tree,
1762                                                     data->password_attrs[i],
1763                                                     "kludgeACLredactedattribute");
1764                 }
1765         }
1766
1767         if (!ac->am_system && !ac->am_administrator && data->confidential_attrs) {
1768                 for (i = 0; data->confidential_attrs[i]; i++) {
1769                         ldb_parse_tree_attr_replace(down_tree,
1770                                                     data->confidential_attrs[i],
1771                                                     "kludgeACLredactedattribute");
1772                 }
1773         }
1774
1775         ret = ldb_build_search_req_ex(&down_req,
1776                                       ldb, ac,
1777                                       req->op.search.base,
1778                                       req->op.search.scope,
1779                                       down_tree,
1780                                       req->op.search.attrs,
1781                                       req->controls,
1782                                       ac, acl_search_callback,
1783                                       req);
1784         LDB_REQ_SET_LOCATION(down_req);
1785         if (ret != LDB_SUCCESS) {
1786                 return ret;
1787         }
1788         /* perform the search */
1789         return ldb_next_request(module, down_req);
1790 }
1791
1792 static int acl_extended(struct ldb_module *module, struct ldb_request *req)
1793 {
1794         struct ldb_context *ldb = ldb_module_get_ctx(module);
1795         struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
1796
1797         /* allow everybody to read the sequence number */
1798         if (strcmp(req->op.extended.oid,
1799                    LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
1800                 return ldb_next_request(module, req);
1801         }
1802
1803         if (dsdb_module_am_system(module) ||
1804             dsdb_module_am_administrator(module) || as_system) {
1805                 return ldb_next_request(module, req);
1806         } else {
1807                 ldb_asprintf_errstring(ldb,
1808                                        "acl_extended: "
1809                                        "attempted database modify not permitted. "
1810                                        "User %s is not SYSTEM or an administrator",
1811                                        acl_user_name(req, module));
1812                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1813         }
1814 }
1815
1816 static const struct ldb_module_ops ldb_acl_module_ops = {
1817         .name              = "acl",
1818         .search            = acl_search,
1819         .add               = acl_add,
1820         .modify            = acl_modify,
1821         .del               = acl_delete,
1822         .rename            = acl_rename,
1823         .extended          = acl_extended,
1824         .init_context      = acl_module_init
1825 };
1826
1827 int ldb_acl_module_init(const char *version)
1828 {
1829         LDB_MODULE_CHECK_VERSION(version);
1830         return ldb_register_module(&ldb_acl_module_ops);
1831 }