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