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 "librpc/gen_ndr/ndr_security.h"
  39 #include "dsdb/samdb/samdb.h"
  40 #include "librpc/gen_ndr/ndr_security.h"
  41 #include "param/param.h"
  42
  43 struct extended_access_check_attribute {
  44         const char *oa_name;
  45         const uint32_t requires_rights;
  46 };
  47
  48 struct acl_private {
  49         bool acl_perform;
  50         const char **password_attrs;
  51 };
  52
  53 struct acl_context {
  54         struct ldb_module *module;
  55         struct ldb_request *req;
  56         bool am_system;
  57         bool allowedAttributes;
  58         bool allowedAttributesEffective;
  59         bool allowedChildClasses;
  60         bool allowedChildClassesEffective;
  61         bool sDRightsEffective;
  62         const char * const *attrs;
  63 };
  64
  65 bool is_root_base_dn(struct ldb_context *ldb, struct ldb_dn *dn_to_check)
  66 {
  67         int result;
  68         struct ldb_dn *root_base_dn = ldb_get_root_basedn(ldb);
  69         result = ldb_dn_compare(root_base_dn,dn_to_check);
  70         return (result==0);
  71 }
  72
  73 static struct security_token *acl_user_token(struct ldb_module *module)
  74 {
  75         struct ldb_context *ldb = ldb_module_get_ctx(module);
  76         struct auth_session_info *session_info
  77                 = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
  78         if(!session_info) {
  79                 return NULL;
  80         }
  81         return session_info->security_token;
  82 }
  83
  84 static int acl_module_init(struct ldb_module *module)
  85 {
  86         struct ldb_context *ldb;
  87         struct acl_private *data;
  88         int ret, i;
  89         TALLOC_CTX *mem_ctx = talloc_new(module);
  90         static const char *attrs[] = { "passwordAttribute", NULL };
  91         struct ldb_result *res;
  92         struct ldb_message *msg;
  93         struct ldb_message_element *password_attributes;
  94
  95         ldb = ldb_module_get_ctx(module);
  96
  97         ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
  98         if (ret != LDB_SUCCESS) {
  99                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 100                           "acl_module_init: Unable to register control with rootdse!\n");
 101                 return LDB_ERR_OPERATIONS_ERROR;
 102         }
 103
 104         data = talloc(module, struct acl_private);
 105         if (data == NULL) {
 106                 ldb_oom(ldb);
 107                 return LDB_ERR_OPERATIONS_ERROR;
 108         }
 109
 110         data->password_attrs = NULL;
 111         data->acl_perform = lp_parm_bool(ldb_get_opaque(ldb, "loadparm"),
 112                                          NULL, "acl", "perform", false);
 113         ldb_module_set_private(module, data);
 114
 115         if (!mem_ctx) {
 116                 ldb_oom(ldb);
 117                 return LDB_ERR_OPERATIONS_ERROR;
 118         }
 119
 120         ret = ldb_search(ldb, mem_ctx, &res,
 121                          ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
 122                          LDB_SCOPE_BASE, attrs, NULL);
 123         if (ret != LDB_SUCCESS) {
 124                 goto done;
 125         }
 126         if (res->count == 0) {
 127                 goto done;
 128         }
 129
 130         if (res->count > 1) {
 131                 talloc_free(mem_ctx);
 132                 return LDB_ERR_CONSTRAINT_VIOLATION;
 133         }
 134
 135         msg = res->msgs[0];
 136
 137         password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
 138         if (!password_attributes) {
 139                 goto done;
 140         }
 141         data->password_attrs = talloc_array(data, const char *, password_attributes->num_values + 1);
 142         if (!data->password_attrs) {
 143                 talloc_free(mem_ctx);
 144                 ldb_oom(ldb);
 145                 return LDB_ERR_OPERATIONS_ERROR;
 146         }
 147         for (i=0; i < password_attributes->num_values; i++) {
 148                 data->password_attrs[i] = (const char *)password_attributes->values[i].data;
 149                 talloc_steal(data->password_attrs, password_attributes->values[i].data);
 150         }
 151         data->password_attrs[i] = NULL;
 152
 153 done:
 154         talloc_free(mem_ctx);
 155         return ldb_next_init(module);
 156 }
 157
 158 static int get_sd_from_ldb_message(TALLOC_CTX *mem_ctx,
 159                                    struct ldb_message *acl_res,
 160                                    struct security_descriptor **sd)
 161 {
 162         struct ldb_message_element *sd_element;
 163         enum ndr_err_code ndr_err;
 164
 165         sd_element = ldb_msg_find_element(acl_res, "nTSecurityDescriptor");
 166         if (!sd_element) {
 167                 *sd = NULL;
 168                 return LDB_SUCCESS;
 169         }
 170         *sd = talloc(mem_ctx, struct security_descriptor);
 171         if(!*sd) {
 172                 return LDB_ERR_OPERATIONS_ERROR;
 173         }
 174         ndr_err = ndr_pull_struct_blob(&sd_element->values[0], *sd, NULL, *sd,
 175                                        (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 176
 177         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 178                 return LDB_ERR_OPERATIONS_ERROR;
 179         }
 180
 181         return LDB_SUCCESS;
 182 }
 183
 184 static const struct GUID *get_oc_guid_from_message(struct ldb_module *module,
 185                                                    struct ldb_message *msg)
 186 {
 187         struct ldb_message_element *oc_el;
 188         struct ldb_context *ldb = ldb_module_get_ctx(module);
 189
 190         oc_el = ldb_msg_find_element(msg, "objectClass");
 191         if (!oc_el) {
 192                 return NULL;
 193         }
 194
 195         return class_schemaid_guid_by_lDAPDisplayName(dsdb_get_schema(ldb),
 196                                                       (char *)oc_el->values[oc_el->num_values-1].data);
 197 }
 198
 199 static int get_dom_sid_from_ldb_message(TALLOC_CTX *mem_ctx,
 200                                    struct ldb_message *acl_res,
 201                                    struct dom_sid **sid)
 202 {
 203         struct ldb_message_element *sid_element;
 204         enum ndr_err_code ndr_err;
 205
 206         sid_element = ldb_msg_find_element(acl_res, "objectSid");
 207         if (!sid_element) {
 208                 *sid = NULL;
 209                 return LDB_SUCCESS;
 210         }
 211         *sid = talloc(mem_ctx, struct dom_sid);
 212         if(!*sid) {
 213                 return LDB_ERR_OPERATIONS_ERROR;
 214         }
 215         ndr_err = ndr_pull_struct_blob(&sid_element->values[0], *sid, NULL, *sid,
 216                                        (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 217
 218         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 219                 return LDB_ERR_OPERATIONS_ERROR;
 220         }
 221
 222         return LDB_SUCCESS;
 223 }
 224
 225
 226 static void acl_debug(struct security_descriptor *sd,
 227                       struct security_token *token,
 228                       struct ldb_dn *dn,
 229                       bool denied,
 230                       int level)
 231 {
 232         if (denied) {
 233                 DEBUG(level, ("Access on %s denied", ldb_dn_get_linearized(dn)));
 234         } else {
 235                 DEBUG(level, ("Access on %s granted", ldb_dn_get_linearized(dn)));
 236         }
 237
 238         DEBUG(level,("Security context: %s\n",
 239                      ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_token,"", token)));
 240         DEBUG(level,("Security descriptor: %s\n",
 241                      ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_descriptor,"", sd)));
 242 }
 243
 244 static int check_access_on_dn(struct ldb_module *module,
 245                               TALLOC_CTX *mem_ctx,
 246                               struct ldb_dn *dn,
 247                               uint32_t access,
 248                               struct object_tree *tree)
 249 {
 250         int ret;
 251         struct ldb_context *ldb = ldb_module_get_ctx(module);
 252         struct ldb_result *acl_res;
 253         struct security_descriptor *sd = NULL;
 254         struct dom_sid *sid = NULL;
 255         NTSTATUS status;
 256         uint32_t access_granted;
 257         static const char *acl_attrs[] = {
 258                 "nTSecurityDescriptor",
 259                 "objectSid",
 260                 NULL
 261         };
 262
 263         ret = ldb_search(ldb, mem_ctx, &acl_res, dn, LDB_SCOPE_BASE, acl_attrs, NULL);
 264         /* we sould be able to find the parent */
 265         if (ret != LDB_SUCCESS) {
 266                 DEBUG(10,("acl: failed to find object %s\n", ldb_dn_get_linearized(dn)));
 267                 return ret;
 268         }
 269
 270         ret = get_sd_from_ldb_message(mem_ctx, acl_res->msgs[0], &sd);
 271         if (ret != LDB_SUCCESS) {
 272                 return LDB_ERR_OPERATIONS_ERROR;
 273         }
 274         /* Theoretically we pass the check if the object has no sd */
 275         if (!sd) {
 276                 return LDB_SUCCESS;
 277         }
 278         ret = get_dom_sid_from_ldb_message(mem_ctx, acl_res->msgs[0], &sid);
 279         if (ret != LDB_SUCCESS) {
 280                 return LDB_ERR_OPERATIONS_ERROR;
 281         }
 282
 283         status = sec_access_check_ds(sd, acl_user_token(module),
 284                                      access,
 285                                      &access_granted,
 286                                      tree,
 287                                      sid);
 288         if (!NT_STATUS_IS_OK(status)) {
 289                 acl_debug(sd,
 290                           acl_user_token(module),
 291                           dn,
 292                           true,
 293                           10);
 294                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 295         }
 296         return LDB_SUCCESS;
 297 }
 298
 299 static int acl_check_access_on_attribute(struct ldb_module *module,
 300                                          TALLOC_CTX *mem_ctx,
 301                                          struct security_descriptor *sd,
 302                                          struct dom_sid *rp_sid,
 303                                          uint32_t access,
 304                                          struct dsdb_attribute *attr)
 305 {
 306         int ret;
 307         NTSTATUS status;
 308         uint32_t access_granted;
 309         struct object_tree *root = NULL;
 310         struct object_tree *new_node = NULL;
 311         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 312         struct security_token *token = acl_user_token(module);
 313         if (attr) {
 314                 if (!GUID_all_zero(&attr->attributeSecurityGUID)) {
 315                         if (!insert_in_object_tree(tmp_ctx,
 316                                                    &attr->attributeSecurityGUID, access,
 317                                                    &root, &new_node)) {
 318                                 DEBUG(10, ("acl_search: cannot add to object tree securityGUID\n"));
 319                                 goto fail;
 320                         }
 321
 322                         if (!insert_in_object_tree(tmp_ctx,
 323                                                    &attr->schemaIDGUID, access, &new_node, &new_node)) {
 324                                 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
 325                                 goto fail;
 326                         }
 327                 }
 328                 else {
 329                         if (!insert_in_object_tree(tmp_ctx,
 330                                                    &attr->schemaIDGUID, access, &root, &new_node)) {
 331                                 DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
 332                                 goto fail;
 333                         }
 334                 }
 335         }
 336         status = sec_access_check_ds(sd, token,
 337                                      access,
 338                                      &access_granted,
 339                                      root,
 340                                      rp_sid);
 341         if (!NT_STATUS_IS_OK(status)) {
 342                 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 343         }
 344         else {
 345                 ret = LDB_SUCCESS;
 346         }
 347         return ret;
 348 fail:
 349         return LDB_ERR_OPERATIONS_ERROR;
 350 }
 351
 352 static int acl_check_access_on_class(struct ldb_module *module,
 353                                      TALLOC_CTX *mem_ctx,
 354                                      struct security_descriptor *sd,
 355                                      struct dom_sid *rp_sid,
 356                                      uint32_t access,
 357                                      const char *class_name)
 358 {
 359         int ret;
 360         struct ldb_context *ldb = ldb_module_get_ctx(module);
 361         NTSTATUS status;
 362         uint32_t access_granted;
 363         struct object_tree *root = NULL;
 364         struct object_tree *new_node = NULL;
 365         struct GUID *guid;
 366         const struct dsdb_schema *schema = dsdb_get_schema(ldb);
 367         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 368         struct security_token *token = acl_user_token(module);
 369         if (class_name) {
 370                 guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
 371                 if (!guid) {
 372                         DEBUG(10, ("acl_search: cannot find class %s\n",
 373                                    class_name));
 374                         goto fail;
 375                 }
 376                 if (!insert_in_object_tree(tmp_ctx,
 377                                            guid, access,
 378                                            &root, &new_node)) {
 379                         DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
 380                         goto fail;
 381                 }
 382         }
 383         status = sec_access_check_ds(sd, token,
 384                                      access,
 385                                      &access_granted,
 386                                      root,
 387                                      rp_sid);
 388         if (!NT_STATUS_IS_OK(status)) {
 389                 ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 390         }
 391         else {
 392                 ret = LDB_SUCCESS;
 393         }
 394         return ret;
 395 fail:
 396         return LDB_ERR_OPERATIONS_ERROR;
 397 }
 398
 399 static int acl_allowedAttributes(struct ldb_module *module,
 400                                  struct ldb_message *sd_msg,
 401                                  struct ldb_message *msg,
 402                                  struct acl_context *ac)
 403 {
 404         struct ldb_message_element *oc_el;
 405         struct ldb_context *ldb = ldb_module_get_ctx(module);
 406         const struct dsdb_schema *schema = dsdb_get_schema(ldb);
 407         TALLOC_CTX *mem_ctx;
 408         const char **attr_list;
 409         int i, ret;
 410
 411         /* If we don't have a schema yet, we can't do anything... */
 412         if (schema == NULL) {
 413                 return LDB_SUCCESS;
 414         }
 415
 416         /* Must remove any existing attribute */
 417         if (ac->allowedAttributes) {
 418                 ldb_msg_remove_attr(msg, "allowedAttributes");
 419         }
 420
 421         mem_ctx = talloc_new(msg);
 422         if (!mem_ctx) {
 423                 ldb_oom(ldb);
 424                 return LDB_ERR_OPERATIONS_ERROR;
 425         }
 426
 427         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 428         attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
 429         if (!attr_list) {
 430                 ldb_asprintf_errstring(ldb, "acl: Failed to get list of attributes");
 431                 talloc_free(mem_ctx);
 432                 return LDB_ERR_OPERATIONS_ERROR;
 433         }
 434         if (ac->allowedAttributes) {
 435                 for (i=0; attr_list && attr_list[i]; i++) {
 436                         ldb_msg_add_string(msg, "allowedAttributes", attr_list[i]);
 437                 }
 438         }
 439         if (ac->allowedAttributesEffective) {
 440                 struct security_descriptor *sd;
 441                 struct dom_sid *sid = NULL;
 442                 struct ldb_control *as_system = ldb_request_get_control(ac->req,
 443                                                                         LDB_CONTROL_AS_SYSTEM_OID);
 444                 ldb_msg_remove_attr(msg, "allowedAttributesEffective");
 445                 if (ac->am_system || as_system) {
 446                         for (i=0; attr_list && attr_list[i]; i++) {
 447                                 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
 448                         }
 449                         return LDB_SUCCESS;
 450                 }
 451
 452                 ret = get_sd_from_ldb_message(mem_ctx, sd_msg, &sd);
 453
 454                 if (ret != LDB_SUCCESS) {
 455                         return ret;
 456                 }
 457                 ret = get_dom_sid_from_ldb_message(mem_ctx, sd_msg, &sid);
 458
 459                 if (ret != LDB_SUCCESS) {
 460                         return ret;
 461                 }
 462                 for (i=0; attr_list && attr_list[i]; i++) {
 463                         struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
 464                                                                                         attr_list[i]);
 465                         if (!attr) {
 466                                 return LDB_ERR_OPERATIONS_ERROR;
 467                         }
 468                         /* remove constructed attributes */
 469                         if (attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED
 470                             || attr->systemOnly
 471                             || (attr->linkID != 0 && attr->linkID % 2 != 0 )) {
 472                                 continue;
 473                         }
 474                         ret = acl_check_access_on_attribute(module,
 475                                                             msg,
 476                                                             sd,
 477                                                             sid,
 478                                                             SEC_ADS_WRITE_PROP,
 479                                                             attr);
 480                         if (ret == LDB_SUCCESS) {
 481                                 ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
 482                         }
 483                 }
 484         }
 485         return LDB_SUCCESS;
 486 }
 487
 488 static int acl_childClasses(struct ldb_module *module,
 489                             struct ldb_message *sd_msg,
 490                             struct ldb_message *msg,
 491                             const char *attrName)
 492 {
 493         struct ldb_message_element *oc_el;
 494         struct ldb_message_element *allowedClasses;
 495         struct ldb_context *ldb = ldb_module_get_ctx(module);
 496         const struct dsdb_schema *schema = dsdb_get_schema(ldb);
 497         const struct dsdb_class *sclass;
 498         int i, j, ret;
 499
 500         /* If we don't have a schema yet, we can't do anything... */
 501         if (schema == NULL) {
 502                 return LDB_SUCCESS;
 503         }
 504
 505         /* Must remove any existing attribute, or else confusion reins */
 506         ldb_msg_remove_attr(msg, attrName);
 507         ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
 508         if (ret != LDB_SUCCESS) {
 509                 return ret;
 510         }
 511
 512         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 513
 514         for (i=0; oc_el && i < oc_el->num_values; i++) {
 515                 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
 516                 if (!sclass) {
 517                         /* We don't know this class?  what is going on? */
 518                         continue;
 519                 }
 520
 521                 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
 522                         ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
 523                 }
 524         }
 525         if (allowedClasses->num_values > 1) {
 526                 qsort(allowedClasses->values,
 527                       allowedClasses->num_values,
 528                       sizeof(*allowedClasses->values),
 529                       (comparison_fn_t)data_blob_cmp);
 530
 531                 for (i=1 ; i < allowedClasses->num_values; i++) {
 532                         struct ldb_val *val1 = &allowedClasses->values[i-1];
 533                         struct ldb_val *val2 = &allowedClasses->values[i];
 534                         if (data_blob_cmp(val1, val2) == 0) {
 535                                 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof(struct ldb_val));
 536                                 allowedClasses->num_values--;
 537                                 i--;
 538                         }
 539                 }
 540         }
 541
 542         return LDB_SUCCESS;
 543 }
 544
 545 static int acl_childClassesEffective(struct ldb_module *module,
 546                                      struct ldb_message *sd_msg,
 547                                      struct ldb_message *msg,
 548                                      struct acl_context *ac)
 549 {
 550         struct ldb_message_element *oc_el;
 551         struct ldb_message_element *allowedClasses = NULL;
 552         struct ldb_context *ldb = ldb_module_get_ctx(module);
 553         const struct dsdb_schema *schema = dsdb_get_schema(ldb);
 554         const struct dsdb_class *sclass;
 555         struct security_descriptor *sd;
 556         struct ldb_control *as_system = ldb_request_get_control(ac->req,
 557                                                                 LDB_CONTROL_AS_SYSTEM_OID);
 558         struct dom_sid *sid = NULL;
 559         int i, j, ret;
 560
 561         if (ac->am_system || as_system) {
 562                 return acl_childClasses(module, sd_msg, msg, "allowedChildClassesEffective");
 563         }
 564
 565         /* If we don't have a schema yet, we can't do anything... */
 566         if (schema == NULL) {
 567                 return LDB_SUCCESS;
 568         }
 569
 570         /* Must remove any existing attribute, or else confusion reins */
 571         ldb_msg_remove_attr(msg, "allowedChildClassesEffective");
 572
 573         oc_el = ldb_msg_find_element(sd_msg, "objectClass");
 574         ret = get_sd_from_ldb_message(msg, sd_msg, &sd);
 575         if (ret != LDB_SUCCESS) {
 576                 return ret;
 577         }
 578         ret = get_dom_sid_from_ldb_message(msg, sd_msg, &sid);
 579
 580         if (ret != LDB_SUCCESS) {
 581                 return ret;
 582         }
 583         for (i=0; oc_el && i < oc_el->num_values; i++) {
 584                 sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
 585                 if (!sclass) {
 586                         /* We don't know this class?  what is going on? */
 587                         continue;
 588                 }
 589
 590                 for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
 591                         ret = acl_check_access_on_class(module,
 592                                                         msg,
 593                                                         sd,
 594                                                         sid,
 595                                                         SEC_ADS_CREATE_CHILD,
 596                                                         sclass->possibleInferiors[j]);
 597                         if (ret == LDB_SUCCESS) {
 598                                 ldb_msg_add_string(msg, "allowedChildClassesEffective",
 599                                                    sclass->possibleInferiors[j]);
 600                         }
 601                 }
 602         }
 603         allowedClasses = ldb_msg_find_element(msg, "allowedChildClassesEffective");
 604         if (!allowedClasses) {
 605                 return LDB_SUCCESS;
 606         }
 607
 608         if (allowedClasses->num_values > 1) {
 609                 qsort(allowedClasses->values,
 610                       allowedClasses->num_values,
 611                       sizeof(*allowedClasses->values),
 612                       (comparison_fn_t)data_blob_cmp);
 613                 for (i=1 ; i < allowedClasses->num_values; i++) {
 614                         struct ldb_val *val1 = &allowedClasses->values[i-1];
 615                         struct ldb_val *val2 = &allowedClasses->values[i];
 616                         if (data_blob_cmp(val1, val2) == 0) {
 617                                 memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val));
 618                                 allowedClasses->num_values--;
 619                                 i--;
 620                         }
 621                 }
 622         }
 623         return LDB_SUCCESS;
 624 }
 625
 626 static int acl_sDRightsEffective(struct ldb_module *module,
 627                                  struct ldb_message *sd_msg,
 628                                  struct ldb_message *msg,
 629                                  struct acl_context *ac)
 630 {
 631         struct ldb_message_element *rightsEffective;
 632         int ret;
 633         struct security_descriptor *sd;
 634         struct ldb_control *as_system = ldb_request_get_control(ac->req,
 635                                                                 LDB_CONTROL_AS_SYSTEM_OID);
 636         struct dom_sid *sid = NULL;
 637         uint32_t flags = 0;
 638
 639         /* Must remove any existing attribute, or else confusion reins */
 640         ldb_msg_remove_attr(msg, "sDRightsEffective");
 641         ret = ldb_msg_add_empty(msg, "sDRightsEffective", 0, &rightsEffective);
 642         if (ret != LDB_SUCCESS) {
 643                 return ret;
 644         }
 645         if (ac->am_system || as_system) {
 646                 flags = SECINFO_OWNER | SECINFO_GROUP |  SECINFO_SACL |  SECINFO_DACL;
 647         }
 648         else {
 649                 /* Get the security descriptor from the message */
 650                 ret = get_sd_from_ldb_message(msg, sd_msg, &sd);
 651                 if (ret != LDB_SUCCESS) {
 652                         return ret;
 653                 }
 654                 ret = get_dom_sid_from_ldb_message(msg, sd_msg, &sid);
 655
 656                 if (ret != LDB_SUCCESS) {
 657                         return ret;
 658                 }
 659                 ret = acl_check_access_on_attribute(module,
 660                                                     msg,
 661                                                     sd,
 662                                                     sid,
 663                                                     SEC_STD_WRITE_OWNER,
 664                                                     NULL);
 665                 if (ret == LDB_SUCCESS) {
 666                         flags |= SECINFO_OWNER | SECINFO_GROUP;
 667                 }
 668                 ret = acl_check_access_on_attribute(module,
 669                                                     msg,
 670                                                     sd,
 671                                                     sid,
 672                                                     SEC_STD_WRITE_DAC,
 673                                                     NULL);
 674                 if (ret == LDB_SUCCESS) {
 675                         flags |= SECINFO_DACL;
 676                 }
 677                 ret = acl_check_access_on_attribute(module,
 678                                                     msg,
 679                                                     sd,
 680                                                     sid,
 681                                                     SEC_FLAG_SYSTEM_SECURITY,
 682                                                     NULL);
 683                 if (ret == LDB_SUCCESS) {
 684                         flags |= SECINFO_SACL;
 685                 }
 686         }
 687         ldb_msg_add_fmt(msg, "sDRightsEffective", "%u", flags);
 688         return LDB_SUCCESS;
 689 }
 690
 691 static int acl_add(struct ldb_module *module, struct ldb_request *req)
 692 {
 693         int ret;
 694         struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.add.message->dn);
 695         struct ldb_context *ldb;
 696         struct ldb_message_element *oc_el;
 697         const struct GUID *guid;
 698         struct object_tree *root = NULL;
 699         struct object_tree *new_node = NULL;
 700         struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
 701
 702         if (dsdb_module_am_system(module) || as_system) {
 703                 return ldb_next_request(module, req);
 704         }
 705
 706         if (ldb_dn_is_special(req->op.add.message->dn)) {
 707                 return ldb_next_request(module, req);
 708         }
 709         ldb = ldb_module_get_ctx(module);
 710         /* Creating an NC. There is probably something we should do here,
 711          * but we will establish that later */
 712         if ((ldb_dn_compare(req->op.add.message->dn, (ldb_get_schema_basedn(ldb))) == 0) ||
 713             (ldb_dn_compare(req->op.add.message->dn, (ldb_get_config_basedn(ldb))) == 0) ||
 714             (ldb_dn_compare(req->op.add.message->dn, (ldb_get_root_basedn(ldb))) == 0)) {
 715                 return ldb_next_request(module, req);
 716         }
 717
 718         oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
 719         if (!oc_el || oc_el->num_values == 0) {
 720                 DEBUG(10,("acl:operation error %s\n", ldb_dn_get_linearized(req->op.add.message->dn)));
 721                 return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
 722         }
 723
 724         guid = class_schemaid_guid_by_lDAPDisplayName(dsdb_get_schema(ldb),
 725                                                       (char *)oc_el->values[oc_el->num_values-1].data);
 726
 727         if (!insert_in_object_tree(req, guid, SEC_ADS_CREATE_CHILD, &root, &new_node)) {
 728                 return LDB_ERR_OPERATIONS_ERROR;
 729         }
 730
 731         ret = check_access_on_dn(module, req, parent, SEC_ADS_CREATE_CHILD, root);
 732         if (ret != LDB_SUCCESS) {
 733                 return ret;
 734         }
 735
 736         return ldb_next_request(module, req);
 737 }
 738
 739 static int acl_modify(struct ldb_module *module, struct ldb_request *req)
 740 {
 741         int ret;
 742         struct ldb_context *ldb = ldb_module_get_ctx(module);
 743         const struct dsdb_schema *schema = dsdb_get_schema(ldb);
 744         int i;
 745         bool modify_sd = false;
 746         const struct GUID *guid;
 747         uint32_t access_granted;
 748         struct object_tree *root = NULL;
 749         struct object_tree *new_node = NULL;
 750         NTSTATUS status;
 751         struct ldb_result *acl_res;
 752         struct security_descriptor *sd;
 753         struct dom_sid *sid = NULL;
 754         struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
 755         TALLOC_CTX *tmp_ctx = talloc_new(req);
 756         static const char *acl_attrs[] = {
 757                 "nTSecurityDescriptor",
 758                 "objectClass",
 759                 "objectSid",
 760                 NULL
 761         };
 762
 763         /* Don't print this debug statement if elements[0].name is going to be NULL */
 764         if(req->op.mod.message->num_elements > 0)
 765         {
 766                 DEBUG(10, ("ldb:acl_modify: %s\n", req->op.mod.message->elements[0].name));
 767         }
 768         if (dsdb_module_am_system(module) || as_system) {
 769                 return ldb_next_request(module, req);
 770         }
 771         if (ldb_dn_is_special(req->op.mod.message->dn)) {
 772                 return ldb_next_request(module, req);
 773         }
 774         ret = ldb_search(ldb, req, &acl_res, req->op.mod.message->dn,
 775                          LDB_SCOPE_BASE, acl_attrs, NULL);
 776
 777         if (ret != LDB_SUCCESS) {
 778                 return ret;
 779         }
 780
 781         ret = get_sd_from_ldb_message(req, acl_res->msgs[0], &sd);
 782         if (ret != LDB_SUCCESS) {
 783                 DEBUG(10, ("acl_modify: cannot get descriptor\n"));
 784                 return ret;
 785         }
 786         /* Theoretically we pass the check if the object has no sd */
 787         if (!sd) {
 788                 return LDB_SUCCESS;
 789         }
 790
 791         guid = get_oc_guid_from_message(module,acl_res->msgs[0]);
 792         if (!guid) {
 793                 DEBUG(10, ("acl_modify: cannot get guid\n"));
 794                 goto fail;
 795         }
 796
 797         ret = get_dom_sid_from_ldb_message(req, acl_res->msgs[0], &sid);
 798         if (ret != LDB_SUCCESS) {
 799                 return LDB_ERR_OPERATIONS_ERROR;
 800         }
 801
 802         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
 803                                    &root, &new_node)) {
 804                 DEBUG(10, ("acl_modify: cannot add to object tree\n"));
 805                 goto fail;
 806         }
 807         for (i=0; i < req->op.mod.message->num_elements; i++){
 808                 const struct dsdb_attribute *attr;
 809                 /* clearTextPassword is not in schema */
 810                 if (strcmp("clearTextPassword", req->op.mod.message->elements[i].name) == 0) {
 811                         attr = dsdb_attribute_by_lDAPDisplayName(schema, "unicodePwd");
 812                 } else {
 813                         attr = dsdb_attribute_by_lDAPDisplayName(schema,
 814                                                                  req->op.mod.message->elements[i].name);
 815                 }
 816                 if (strcmp("nTSecurityDescriptor", req->op.mod.message->elements[i].name) == 0) {
 817                         modify_sd = true;
 818                 } else {
 819
 820                         if (!attr) {
 821                                 DEBUG(10, ("acl_modify: cannot find attribute %s\n",
 822                                            req->op.mod.message->elements[i].name));
 823                                 goto fail;
 824                         }
 825                         if (!insert_in_object_tree(tmp_ctx,
 826                                                    &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
 827                                                    &new_node, &new_node)) {
 828                                 DEBUG(10, ("acl_modify: cannot add to object tree securityGUID\n"));
 829                                 goto fail;
 830                         }
 831
 832                         if (!insert_in_object_tree(tmp_ctx,
 833                                                    &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
 834                                 DEBUG(10, ("acl_modify: cannot add to object tree attributeGUID\n"));
 835                                 goto fail;
 836                         }
 837                 }
 838         }
 839
 840         if (root->num_of_children > 0) {
 841                 status = sec_access_check_ds(sd, acl_user_token(module),
 842                                              SEC_ADS_WRITE_PROP,
 843                                              &access_granted,
 844                                              root,
 845                                              sid);
 846
 847                 if (!NT_STATUS_IS_OK(status)) {
 848                         DEBUG(10, ("Object %s nas no write property access\n",
 849                                    ldb_dn_get_linearized(req->op.mod.message->dn)));
 850                         acl_debug(sd,
 851                                   acl_user_token(module),
 852                                   req->op.mod.message->dn,
 853                                   true,
 854                                   10);
 855                         talloc_free(tmp_ctx);
 856                         return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 857                 }
 858         }
 859         if (modify_sd) {
 860                 status = sec_access_check_ds(sd, acl_user_token(module),
 861                                              SEC_STD_WRITE_DAC,
 862                                              &access_granted,
 863                                              NULL,
 864                                              sid);
 865
 866                 if (!NT_STATUS_IS_OK(status)) {
 867                         DEBUG(10, ("Object %s nas no write dacl access\n",
 868                                    ldb_dn_get_linearized(req->op.mod.message->dn)));
 869                         acl_debug(sd,
 870                                   acl_user_token(module),
 871                                   req->op.mod.message->dn,
 872                                   true,
 873                                   10);
 874                         talloc_free(tmp_ctx);
 875                         return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
 876                 }
 877         }
 878
 879         talloc_free(tmp_ctx);
 880         return ldb_next_request(module, req);
 881 fail:
 882         talloc_free(tmp_ctx);
 883         return LDB_ERR_OPERATIONS_ERROR;
 884 }
 885
 886 /* similar to the modify for the time being.
 887  * We need to concider the special delete tree case, though - TODO */
 888 static int acl_delete(struct ldb_module *module, struct ldb_request *req)
 889 {
 890         int ret;
 891         struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.del.dn);
 892         struct ldb_context *ldb;
 893         struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
 894
 895         DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req->op.del.dn)));
 896         if (dsdb_module_am_system(module) || as_system) {
 897                 return ldb_next_request(module, req);
 898         }
 899
 900         if (ldb_dn_is_special(req->op.del.dn)) {
 901                 return ldb_next_request(module, req);
 902         }
 903         ldb = ldb_module_get_ctx(module);
 904         /* first check if we have delete object right */
 905         ret = check_access_on_dn(module, req, req->op.del.dn, SEC_STD_DELETE, NULL);
 906         if (ret == LDB_SUCCESS) {
 907                 return ldb_next_request(module, req);
 908         }
 909
 910         /* Nope, we don't have delete object. Lets check if we have delete child on the parent */
 911         /* No parent, so check fails */
 912         if ((ldb_dn_compare(req->op.del.dn, (ldb_get_schema_basedn(ldb))) == 0) ||
 913             (ldb_dn_compare(req->op.del.dn, (ldb_get_config_basedn(ldb))) == 0) ||
 914             (ldb_dn_compare(req->op.del.dn, (ldb_get_root_basedn(ldb))) == 0)) {
 915                 DEBUG(10,("acl:deleting an NC\n"));
 916                 return ldb_module_done(req, NULL, NULL, LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS);
 917         }
 918
 919         ret = check_access_on_dn(module, req, parent, SEC_ADS_DELETE_CHILD, NULL);
 920         if (ret != LDB_SUCCESS) {
 921                 return ret;
 922         }
 923         return ldb_next_request(module, req);
 924 }
 925
 926 static int acl_rename(struct ldb_module *module, struct ldb_request *req)
 927 {
 928         int ret;
 929         struct ldb_dn *oldparent = ldb_dn_get_parent(req, req->op.rename.olddn);
 930         struct ldb_dn *newparent = ldb_dn_get_parent(req, req->op.rename.newdn);
 931         struct ldb_context *ldb;
 932         struct security_descriptor *sd = NULL;
 933         struct dom_sid *sid = NULL;
 934         struct ldb_result *acl_res;
 935         const struct GUID *guid;
 936         struct object_tree *root = NULL;
 937         struct object_tree *new_node = NULL;
 938         struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
 939         TALLOC_CTX *tmp_ctx = talloc_new(req);
 940         NTSTATUS status;
 941         uint32_t access_granted;
 942         static const char *acl_attrs[] = {
 943                 "nTSecurityDescriptor",
 944                 "objectClass",
 945                 "objectSid",
 946                 NULL
 947         };
 948
 949         DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)));
 950         if (dsdb_module_am_system(module) || as_system) {
 951                 return ldb_next_request(module, req);
 952         }
 953         if (ldb_dn_is_special(req->op.rename.olddn)) {
 954                 return ldb_next_request(module, req);
 955         }
 956         ldb = ldb_module_get_ctx(module);
 957
 958         /* TODO search to include deleted objects */
 959         ret = ldb_search(ldb, req, &acl_res, req->op.rename.olddn,
 960                          LDB_SCOPE_BASE, acl_attrs, NULL);
 961         /* we sould be able to find the parent */
 962         if (ret != LDB_SUCCESS) {
 963                 DEBUG(10,("acl: failed to find object %s\n",
 964                           ldb_dn_get_linearized(req->op.rename.olddn)));
 965                 return ret;
 966         }
 967
 968         guid = get_oc_guid_from_message(module,acl_res->msgs[0]);
 969         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
 970                                    &root, &new_node)) {
 971                 return LDB_ERR_OPERATIONS_ERROR;
 972         };
 973
 974         guid = attribute_schemaid_guid_by_lDAPDisplayName(dsdb_get_schema(ldb),
 975                                                           "name");
 976         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
 977                                    &new_node, &new_node)) {
 978                 return LDB_ERR_OPERATIONS_ERROR;
 979         };
 980
 981         ret = get_sd_from_ldb_message(req, acl_res->msgs[0], &sd);
 982
 983         if (ret != LDB_SUCCESS) {
 984                 return LDB_ERR_OPERATIONS_ERROR;
 985         }
 986         /* Theoretically we pass the check if the object has no sd */
 987         if (!sd) {
 988                 return LDB_SUCCESS;
 989         }
 990         ret = get_dom_sid_from_ldb_message(req, acl_res->msgs[0], &sid);
 991         if (ret != LDB_SUCCESS) {
 992                 return LDB_ERR_OPERATIONS_ERROR;
 993         }
 994
 995         status = sec_access_check_ds(sd, acl_user_token(module),
 996                                      SEC_ADS_WRITE_PROP,
 997                                      &access_granted,
 998                                      root,
 999                                      sid);
1000
1001         if (!NT_STATUS_IS_OK(status)) {
1002                 DEBUG(10, ("Object %s nas no wp on name\n",
1003                            ldb_dn_get_linearized(req->op.rename.olddn)));
1004                 acl_debug(sd,
1005                           acl_user_token(module),
1006                           req->op.rename.olddn,
1007                           true,
1008                           10);
1009                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1010         }
1011
1012         if (ldb_dn_compare(oldparent, newparent) == 0) {
1013                 /* regular rename, not move, nothing more to do */
1014                 return ldb_next_request(module, req);
1015         }
1016
1017         /* What exactly to do in this case? It would fail anyway.. */
1018         if ((ldb_dn_compare(req->op.rename.newdn, (ldb_get_schema_basedn(ldb))) == 0) ||
1019             (ldb_dn_compare(req->op.rename.newdn, (ldb_get_config_basedn(ldb))) == 0) ||
1020             (ldb_dn_compare(req->op.rename.newdn, (ldb_get_root_basedn(ldb))) == 0)) {
1021                 DEBUG(10,("acl:moving as an NC\n"));
1022                 return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
1023         }
1024         /* new parent should have create child */
1025         talloc_free(tmp_ctx);
1026         tmp_ctx = talloc_new(req);
1027         root = NULL;
1028         new_node = NULL;
1029         guid = get_oc_guid_from_message(module,acl_res->msgs[0]);
1030         if (!guid) {
1031                 DEBUG(10,("acl:renamed object has no object class\n"));
1032                 return ldb_module_done(req, NULL, NULL,  LDB_ERR_OPERATIONS_ERROR);
1033         }
1034         if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_CREATE_CHILD,
1035                                    &root, &new_node)) {
1036                 return LDB_ERR_OPERATIONS_ERROR;
1037         }
1038         ret = check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, root);
1039         if (ret != LDB_SUCCESS) {
1040                 DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
1041                 return ret;
1042         }
1043         /* do we have delete object on the object? */
1044
1045         status = sec_access_check_ds(sd, acl_user_token(module),
1046                                      SEC_STD_DELETE,
1047                                      &access_granted,
1048                                      NULL,
1049                                      sid);
1050
1051         if (NT_STATUS_IS_OK(status)) {
1052                 return ldb_next_request(module, req);
1053         }
1054         /* what about delete child on the current parent */
1055         ret = check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL);
1056         if (ret != LDB_SUCCESS) {
1057                 DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
1058                 return ldb_module_done(req, NULL, NULL, ret);
1059         }
1060         return ldb_next_request(module, req);
1061 }
1062
1063 static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
1064 {
1065         struct ldb_context *ldb;
1066         struct acl_context *ac;
1067         struct acl_private *data;
1068         struct ldb_result *acl_res;
1069         static const char *acl_attrs[] = {
1070                 "objectClass",
1071                 "nTSecurityDescriptor",
1072                 "objectSid",
1073                 NULL
1074         };
1075         int ret, i;
1076
1077         ac = talloc_get_type(req->context, struct acl_context);
1078         data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
1079         ldb = ldb_module_get_ctx(ac->module);
1080
1081         if (!ares) {
1082                 return ldb_module_done(ac->req, NULL, NULL,
1083                                        LDB_ERR_OPERATIONS_ERROR);
1084         }
1085         if (ares->error != LDB_SUCCESS) {
1086                 return ldb_module_done(ac->req, ares->controls,
1087                                        ares->response, ares->error);
1088         }
1089
1090         switch (ares->type) {
1091         case LDB_REPLY_ENTRY:
1092                 if (ac->allowedAttributes
1093                     || ac->allowedChildClasses
1094                     || ac->allowedChildClassesEffective
1095                     || ac->allowedAttributesEffective
1096                     || ac->sDRightsEffective) {
1097                         ret = ldb_search(ldb, ac, &acl_res, ares->message->dn, LDB_SCOPE_BASE, acl_attrs, NULL);
1098                         if (ret != LDB_SUCCESS) {
1099                                 return ldb_module_done(ac->req, NULL, NULL, ret);
1100                         }
1101                         if (ac->allowedAttributes || ac->allowedAttributesEffective) {
1102                                 ret = acl_allowedAttributes(ac->module, acl_res->msgs[0], ares->message, ac);
1103                                 if (ret != LDB_SUCCESS) {
1104                                         return ldb_module_done(ac->req, NULL, NULL, ret);
1105                                 }
1106                         }
1107                         if (ac->allowedChildClasses) {
1108                                 ret = acl_childClasses(ac->module, acl_res->msgs[0],
1109                                                        ares->message, "allowedChildClasses");
1110                                 if (ret != LDB_SUCCESS) {
1111                                         return ldb_module_done(ac->req, NULL, NULL, ret);
1112                                 }
1113                         }
1114                         if (ac->allowedChildClassesEffective) {
1115                                 ret = acl_childClassesEffective(ac->module,
1116                                                                 acl_res->msgs[0], ares->message, ac);
1117                                 if (ret != LDB_SUCCESS) {
1118                                         return ldb_module_done(ac->req, NULL, NULL, ret);
1119                                 }
1120                         }
1121                         if (ac->sDRightsEffective) {
1122                                 ret = acl_sDRightsEffective(ac->module,
1123                                                             acl_res->msgs[0], ares->message, ac);
1124                                 if (ret != LDB_SUCCESS) {
1125                                         return ldb_module_done(ac->req, NULL, NULL, ret);
1126                                 }
1127                         }
1128                 }
1129                 if (data && data->password_attrs) {
1130                         if (!ac->am_system) {
1131                                 for (i = 0; data->password_attrs[i]; i++) {
1132                                         ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
1133                                 }
1134                         }
1135                 }
1136                 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
1137
1138         case LDB_REPLY_REFERRAL:
1139                 return ldb_module_send_referral(ac->req, ares->referral);
1140
1141         case LDB_REPLY_DONE:
1142                 return ldb_module_done(ac->req, ares->controls,
1143                                        ares->response, LDB_SUCCESS);
1144
1145         }
1146         return LDB_SUCCESS;
1147 }
1148
1149 static int acl_search(struct ldb_module *module, struct ldb_request *req)
1150 {
1151         struct ldb_context *ldb;
1152         struct acl_context *ac;
1153         struct ldb_request *down_req;
1154         struct acl_private *data;
1155         int ret, i;
1156
1157         ldb = ldb_module_get_ctx(module);
1158
1159         ac = talloc_zero(req, struct acl_context);
1160         if (ac == NULL) {
1161                 ldb_oom(ldb);
1162                 return LDB_ERR_OPERATIONS_ERROR;
1163         }
1164         data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
1165
1166         ac->module = module;
1167         ac->req = req;
1168         ac->am_system = dsdb_module_am_system(module);
1169         ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
1170         ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
1171         ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
1172         ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
1173         ac->sDRightsEffective = ldb_attr_in_list(req->op.search.attrs, "sDRightsEffective");
1174
1175         /* replace any attributes in the parse tree that are private,
1176            so we don't allow a search for 'userPassword=penguin',
1177            just as we would not allow that attribute to be returned */
1178         if (ac->am_system) {
1179                 /* FIXME: We should copy the tree and keep the original unmodified. */
1180                 /* remove password attributes */
1181                 if (data && data->password_attrs) {
1182                         for (i = 0; data->password_attrs[i]; i++) {
1183                                 ldb_parse_tree_attr_replace(req->op.search.tree,
1184                                                             data->password_attrs[i],
1185                                                             "kludgeACLredactedattribute");
1186                         }
1187                 }
1188         }
1189         ret = ldb_build_search_req_ex(&down_req,
1190                                       ldb, ac,
1191                                       req->op.search.base,
1192                                       req->op.search.scope,
1193                                       req->op.search.tree,
1194                                       req->op.search.attrs,
1195                                       req->controls,
1196                                       ac, acl_search_callback,
1197                                       req);
1198         if (ret != LDB_SUCCESS) {
1199                 return ret;
1200         }
1201         /* perform the search */
1202         return ldb_next_request(module, down_req);
1203 }
1204
1205 _PUBLIC_ const struct ldb_module_ops ldb_acl_module_ops = {
1206         .name              = "acl",
1207         .search            = acl_search,
1208         .add               = acl_add,
1209         .modify            = acl_modify,
1210         .del               = acl_delete,
1211         .rename            = acl_rename,
1212         .init_context      = acl_module_init
1213 };