libcli/security/create_descriptor.c

   1 /*
   2    Copyright (C) Nadezhda Ivanova 2009
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 /*
  19  *  Name: create_descriptor
  20  *
  21  *  Component: routines for calculating and creating security descriptors
  22  *  as described in MS-DTYP 2.5.3.x
  23  *
  24  *  Description:
  25  *
  26  *
  27  *  Author: Nadezhda Ivanova
  28  */
  29 #include "replace.h"
  30 #include "lib/util/debug.h"
  31 #include "libcli/security/security.h"
  32 #include "librpc/gen_ndr/ndr_security.h"
  33
  34 /* Todos:
  35  * build the security token dacl as follows:
  36  * SYSTEM: GA, OWNER: GA, LOGIN_SID:GW|GE
  37  * Need session id information for the login SID. Probably
  38  * the best place for this is during token creation
  39  *
  40  * Implement SD Invariants
  41  * ACE sorting rules
  42  * LDAP_SERVER_SD_FLAGS_OID control
  43  * ADTS 7.1.3.3 needs to be clarified
  44  */
  45
  46 /* the mapping function for generic rights for DS.(GA,GR,GW,GX)
  47  * The mapping function is passed as an argument to the
  48  * descriptor calculating routine and depends on the security
  49  * manager that calls the calculating routine.
  50  * TODO: need similar mappings for the file system and
  51  * registry security managers in order to make this code
  52  * generic for all security managers
  53  */
  54
  55 uint32_t map_generic_rights_ds(uint32_t access_mask)
  56 {
  57         if (access_mask & SEC_GENERIC_ALL) {
  58                 access_mask |= SEC_ADS_GENERIC_ALL;
  59                 access_mask &= ~SEC_GENERIC_ALL;
  60         }
  61
  62         if (access_mask & SEC_GENERIC_EXECUTE) {
  63                 access_mask |= SEC_ADS_GENERIC_EXECUTE;
  64                 access_mask &= ~SEC_GENERIC_EXECUTE;
  65         }
  66
  67         if (access_mask & SEC_GENERIC_WRITE) {
  68                 access_mask |= SEC_ADS_GENERIC_WRITE;
  69                 access_mask &= ~SEC_GENERIC_WRITE;
  70         }
  71
  72         if (access_mask & SEC_GENERIC_READ) {
  73                 access_mask |= SEC_ADS_GENERIC_READ;
  74                 access_mask &= ~SEC_GENERIC_READ;
  75         }
  76
  77         return access_mask;
  78 }
  79
  80 /* Not sure what this has to be,
  81 * and it does not seem to have any influence */
  82 static bool object_in_list(const struct GUID *object_list, const struct GUID *object)
  83 {
  84         size_t i;
  85
  86         if (object_list == NULL) {
  87                 return true;
  88         }
  89
  90         if (GUID_all_zero(object)) {
  91                 return true;
  92         }
  93
  94         for (i=0; ; i++) {
  95                 if (GUID_all_zero(&object_list[i])) {
  96                         return false;
  97                 }
  98                 if (!GUID_equal(&object_list[i], object)) {
  99                         continue;
 100                 }
 101
 102                 return true;
 103         }
 104
 105         return false;
 106 }
 107
 108 /* returns true if the ACE gontains generic information
 109  * that needs to be processed additionally */
 110
 111 static bool desc_ace_has_generic(const struct security_ace *ace)
 112 {
 113         if (ace->access_mask & SEC_GENERIC_ALL || ace->access_mask & SEC_GENERIC_READ ||
 114             ace->access_mask & SEC_GENERIC_WRITE || ace->access_mask & SEC_GENERIC_EXECUTE) {
 115                 return true;
 116         }
 117         if (dom_sid_equal(&ace->trustee, &global_sid_Creator_Owner) ||
 118             dom_sid_equal(&ace->trustee, &global_sid_Creator_Group)) {
 119                 return true;
 120         }
 121         return false;
 122 }
 123
 124 /* creates an ace in which the generic information is expanded */
 125
 126 static void desc_expand_generic(struct security_ace *new_ace,
 127                                 struct dom_sid *owner,
 128                                 struct dom_sid *group)
 129 {
 130         new_ace->access_mask = map_generic_rights_ds(new_ace->access_mask);
 131         if (dom_sid_equal(&new_ace->trustee, &global_sid_Creator_Owner)) {
 132                 new_ace->trustee = *owner;
 133         }
 134         if (dom_sid_equal(&new_ace->trustee, &global_sid_Creator_Group)) {
 135                 new_ace->trustee = *group;
 136         }
 137         new_ace->flags = 0x0;
 138 }
 139
 140 static struct security_acl *calculate_inherited_from_parent(TALLOC_CTX *mem_ctx,
 141                                                             struct security_acl *acl,
 142                                                             bool is_container,
 143                                                             struct dom_sid *owner,
 144                                                             struct dom_sid *group,
 145                                                             struct GUID *object_list)
 146 {
 147         uint32_t i;
 148         struct security_acl *tmp_acl = NULL;
 149
 150         if (!acl) {
 151                 return NULL;
 152         }
 153         tmp_acl = talloc_zero(mem_ctx, struct security_acl);
 154         if (!tmp_acl) {
 155                 return NULL;
 156         }
 157
 158         for (i=0; i < acl->num_aces; i++) {
 159                 const struct security_ace *ace = &acl->aces[i];
 160                 const struct GUID *inherited_object = NULL;
 161                 const struct GUID *inherited_property = NULL;
 162                 struct security_ace *tmp_ace = NULL;
 163                 bool applies = false;
 164                 bool inherited_only = false;
 165                 bool expand_ace = false;
 166                 bool expand_only = false;
 167
 168                 if (is_container && (ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 169                         applies = true;
 170                 } else if (!is_container && (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
 171                         applies = true;
 172                 }
 173
 174                 if (!applies) {
 175                         /*
 176                          * If the ace doesn't apply to the
 177                          * current node, we should only keep
 178                          * it as SEC_ACE_FLAG_OBJECT_INHERIT
 179                          * on a container. We'll add
 180                          * SEC_ACE_FLAG_INHERITED_ACE
 181                          * and SEC_ACE_FLAG_INHERIT_ONLY below.
 182                          *
 183                          * Otherwise we should completely ignore it.
 184                          */
 185                         if (!(ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
 186                                 continue;
 187                         }
 188                 }
 189
 190                 switch (ace->type) {
 191                 case SEC_ACE_TYPE_ACCESS_ALLOWED:
 192                 case SEC_ACE_TYPE_ACCESS_DENIED:
 193                 case SEC_ACE_TYPE_SYSTEM_AUDIT:
 194                 case SEC_ACE_TYPE_SYSTEM_ALARM:
 195                 case SEC_ACE_TYPE_ALLOWED_COMPOUND:
 196                         break;
 197
 198                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 199                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 200                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 201                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 202                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK_OBJECT:
 203                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK_OBJECT:
 204                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK_OBJECT:
 205                         if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
 206                                 inherited_property = &ace->object.object.type.type;
 207                         }
 208                         if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
 209                                 inherited_object = &ace->object.object.inherited_type.inherited_type;
 210                         }
 211
 212                         if (inherited_object != NULL && !object_in_list(object_list, inherited_object)) {
 213                                 /*
 214                                  * An explicit object class schemaId is given,
 215                                  * but doesn't belong to the current object.
 216                                  */
 217                                 applies = false;
 218                         }
 219
 220                         break;
 221
 222                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK:
 223                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK:
 224                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK:
 225                         break;
 226                 case SEC_ACE_TYPE_SYSTEM_RESOURCE_ATTRIBUTE:
 227                         break;
 228                 case SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK:
 229                 case SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK_OBJECT:
 230                 case SEC_ACE_TYPE_SYSTEM_MANDATORY_LABEL:
 231                 case SEC_ACE_TYPE_SYSTEM_SCOPED_POLICY_ID:
 232                 default:
 233                         DBG_WARNING("ACE type %d is not handled\n", ace->type);
 234                         TALLOC_FREE(tmp_acl);
 235                         return NULL;
 236                 }
 237
 238                 if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
 239                         if (!applies) {
 240                                 /*
 241                                  * If the ACE doesn't apply to
 242                                  * the current object, we should
 243                                  * ignore it as it should not be
 244                                  * inherited any further
 245                                  */
 246                                 continue;
 247                         }
 248                         /*
 249                          * We should only keep the expanded version
 250                          * of the ACE on the current object.
 251                          */
 252                         expand_ace = true;
 253                         expand_only = true;
 254                 } else if (applies) {
 255                         /*
 256                          * We check if should also add
 257                          * the expanded version of the ACE
 258                          * in addition, in case we should
 259                          * expand generic access bits or
 260                          * special sids.
 261                          *
 262                          * In that case we need to
 263                          * keep the original ACE with
 264                          * SEC_ACE_FLAG_INHERIT_ONLY.
 265                          */
 266                         expand_ace = desc_ace_has_generic(ace);
 267                         if (expand_ace) {
 268                                 inherited_only = true;
 269                         }
 270                 } else {
 271                         /*
 272                          * If the ACE doesn't apply
 273                          * to the current object,
 274                          * we need to keep it with
 275                          * SEC_ACE_FLAG_INHERIT_ONLY
 276                          * in order to apply them to
 277                          * grandchildren
 278                          */
 279                         inherited_only = true;
 280                 }
 281
 282                 if (expand_ace) {
 283                         tmp_acl->aces = talloc_realloc(tmp_acl,
 284                                                        tmp_acl->aces,
 285                                                        struct security_ace,
 286                                                        tmp_acl->num_aces+1);
 287                         if (tmp_acl->aces == NULL) {
 288                                 TALLOC_FREE(tmp_acl);
 289                                 return NULL;
 290                         }
 291
 292                         tmp_ace = &tmp_acl->aces[tmp_acl->num_aces];
 293                         tmp_acl->num_aces++;
 294
 295                         *tmp_ace = *ace;
 296
 297                         /*
 298                          * Expand generic access bits as well as special
 299                          * sids.
 300                          */
 301                         desc_expand_generic(tmp_ace, owner, group);
 302
 303                         /*
 304                          * Expanded ACEs are marked as inherited,
 305                          * but never inherited any further to
 306                          * grandchildren.
 307                          */
 308                         tmp_ace->flags |= SEC_ACE_FLAG_INHERITED_ACE;
 309                         tmp_ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
 310                         tmp_ace->flags &= ~SEC_ACE_FLAG_OBJECT_INHERIT;
 311                         tmp_ace->flags &= ~SEC_ACE_FLAG_NO_PROPAGATE_INHERIT;
 312
 313                         /*
 314                          * Expanded ACEs never have an explicit
 315                          * object class schemaId, so clear it
 316                          * if present.
 317                          */
 318                         if (inherited_object != NULL) {
 319                                 tmp_ace->object.object.flags &= ~SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT;
 320                         }
 321
 322                         /*
 323                          * If the ACE had an explicit object class
 324                          * schemaId, but no attribute/propertySet
 325                          * we need to downgrade the _OBJECT variants
 326                          * to the normal ones.
 327                          */
 328                         if (inherited_property == NULL) {
 329                                 switch (tmp_ace->type) {
 330                                 case SEC_ACE_TYPE_ACCESS_ALLOWED:
 331                                 case SEC_ACE_TYPE_ACCESS_DENIED:
 332                                 case SEC_ACE_TYPE_SYSTEM_AUDIT:
 333                                 case SEC_ACE_TYPE_SYSTEM_ALARM:
 334                                 case SEC_ACE_TYPE_ALLOWED_COMPOUND:
 335                                         break;
 336                                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 337                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_ALLOWED;
 338                                         break;
 339                                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 340                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_DENIED;
 341                                         break;
 342                                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 343                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_ALARM;
 344                                         break;
 345                                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 346                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_AUDIT;
 347                                         break;
 348                                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK_OBJECT:
 349                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK;
 350                                         break;
 351                                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK_OBJECT:
 352                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK;
 353                                         break;
 354                                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK_OBJECT:
 355                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK;
 356                                         break;
 357                                 default:
 358                                         /*
 359                                          * SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK_OBJECT
 360                                          * is reserved.
 361                                          */
 362                                         break;
 363                                 }
 364                         }
 365
 366                         if (expand_only) {
 367                                 continue;
 368                         }
 369                 }
 370
 371                 tmp_acl->aces = talloc_realloc(tmp_acl,
 372                                                tmp_acl->aces,
 373                                                struct security_ace,
 374                                                tmp_acl->num_aces+1);
 375                 if (tmp_acl->aces == NULL) {
 376                         TALLOC_FREE(tmp_acl);
 377                         return NULL;
 378                 }
 379
 380                 tmp_ace = &tmp_acl->aces[tmp_acl->num_aces];
 381                 tmp_acl->num_aces++;
 382
 383                 *tmp_ace = *ace;
 384                 tmp_ace->flags |= SEC_ACE_FLAG_INHERITED_ACE;
 385
 386                 if (inherited_only) {
 387                         tmp_ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
 388                 } else {
 389                         tmp_ace->flags &= ~SEC_ACE_FLAG_INHERIT_ONLY;
 390                 }
 391
 392                 if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
 393                         tmp_ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
 394                         tmp_ace->flags &= ~SEC_ACE_FLAG_OBJECT_INHERIT;
 395                         tmp_ace->flags &= ~SEC_ACE_FLAG_NO_PROPAGATE_INHERIT;
 396                 }
 397         }
 398         if (tmp_acl->num_aces == 0) {
 399                 TALLOC_FREE(tmp_acl);
 400                 return NULL;
 401         }
 402         if (acl) {
 403                 tmp_acl->revision = acl->revision;
 404         }
 405         return tmp_acl;
 406 }
 407
 408 static struct security_acl *process_user_acl(TALLOC_CTX *mem_ctx,
 409                                              struct security_acl *acl,
 410                                              bool is_container,
 411                                              struct dom_sid *owner,
 412                                              struct dom_sid *group,
 413                                              struct GUID *object_list,
 414                                              bool is_protected)
 415 {
 416         uint32_t i;
 417         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 418         struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
 419         struct security_acl *new_acl;
 420
 421         if (!acl)
 422                 return NULL;
 423
 424         if (!tmp_acl)
 425                 return NULL;
 426
 427         tmp_acl->revision = acl->revision;
 428         DBG_DEBUG("acl revision %d\n", acl->revision);
 429
 430         for (i=0; i < acl->num_aces; i++){
 431                 struct security_ace *ace = &acl->aces[i];
 432                 /* Remove ID flags from user-provided ACEs
 433                  * if we break inheritance, ignore them otherwise */
 434                 if (ace->flags & SEC_ACE_FLAG_INHERITED_ACE) {
 435                         if (is_protected) {
 436                                 ace->flags &= ~SEC_ACE_FLAG_INHERITED_ACE;
 437                         } else {
 438                                 continue;
 439                         }
 440                 }
 441
 442                 if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY &&
 443                     !(ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT ||
 444                       ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
 445                         continue;
 446
 447                 tmp_acl->aces = talloc_realloc(tmp_acl,
 448                                                tmp_acl->aces,
 449                                                struct security_ace,
 450                                                tmp_acl->num_aces+1);
 451                 tmp_acl->aces[tmp_acl->num_aces] = *ace;
 452                 tmp_acl->num_aces++;
 453                 if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
 454                         continue;
 455                 }
 456                 /* if the ACE contains CO, CG, GA, GE, GR or GW, and is inheritable
 457                  * it has to be expanded to two aces, the original as IO,
 458                  * and another one where these are translated */
 459                 if (desc_ace_has_generic(ace)) {
 460                         if (!(ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 461                                 desc_expand_generic(&tmp_acl->aces[tmp_acl->num_aces-1],
 462                                                     owner,
 463                                                     group);
 464                         } else {
 465                                 /*The original ACE becomes read only */
 466                                 tmp_acl->aces[tmp_acl->num_aces-1].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
 467                                 tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces,
 468                                                                struct security_ace,
 469                                                                tmp_acl->num_aces+1);
 470                                 /* add a new ACE with expanded generic info */
 471                                 tmp_acl->aces[tmp_acl->num_aces] = *ace;
 472                                 desc_expand_generic(&tmp_acl->aces[tmp_acl->num_aces],
 473                                                     owner,
 474                                                     group);
 475                                 tmp_acl->num_aces++;
 476                         }
 477                 }
 478         }
 479         new_acl = security_acl_dup(mem_ctx,tmp_acl);
 480
 481         if (new_acl)
 482                 new_acl->revision = acl->revision;
 483
 484         talloc_free(tmp_ctx);
 485         return new_acl;
 486 }
 487
 488 static void cr_descr_log_descriptor(struct security_descriptor *sd,
 489                                     const char *message,
 490                                     int level)
 491 {
 492         if (sd) {
 493                 DEBUG(level,("%s: %s\n", message,
 494                              ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_descriptor,
 495                                                      "", sd)));
 496         }
 497         else {
 498                 DEBUG(level,("%s: NULL\n", message));
 499         }
 500 }
 501
 502 #if 0
 503 static void cr_descr_log_acl(struct security_acl *acl,
 504                                     const char *message,
 505                                     int level)
 506 {
 507         if (acl) {
 508                 DEBUG(level,("%s: %s\n", message,
 509                              ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_acl,
 510                                                      "", acl)));
 511         }
 512         else {
 513                 DEBUG(level,("%s: NULL\n", message));
 514         }
 515 }
 516 #endif
 517
 518 static bool compute_acl(struct security_descriptor *parent_sd,
 519                         struct security_descriptor *creator_sd,
 520                         bool is_container,
 521                         uint32_t inherit_flags,
 522                         struct GUID *object_list,
 523                         uint32_t (*generic_map)(uint32_t access_mask),
 524                         struct security_token *token,
 525                         struct security_descriptor *new_sd) /* INOUT argument */
 526 {
 527         struct security_acl *user_dacl, *user_sacl, *inherited_dacl, *inherited_sacl;
 528         int level = 10;
 529
 530         if (!parent_sd || !(inherit_flags & SEC_DACL_AUTO_INHERIT)) {
 531                 inherited_dacl = NULL;
 532         } else if (creator_sd && (creator_sd->type & SEC_DESC_DACL_PROTECTED)) {
 533                 inherited_dacl = NULL;
 534         } else {
 535                 inherited_dacl = calculate_inherited_from_parent(new_sd,
 536                                                                  parent_sd->dacl,
 537                                                                  is_container,
 538                                                                  new_sd->owner_sid,
 539                                                                  new_sd->group_sid,
 540                                                                  object_list);
 541         }
 542
 543
 544         if (!parent_sd || !(inherit_flags & SEC_SACL_AUTO_INHERIT)) {
 545                 inherited_sacl = NULL;
 546         } else if (creator_sd && (creator_sd->type & SEC_DESC_SACL_PROTECTED)) {
 547                 inherited_sacl = NULL;
 548         } else {
 549                 inherited_sacl = calculate_inherited_from_parent(new_sd,
 550                                                                  parent_sd->sacl,
 551                                                                  is_container,
 552                                                                  new_sd->owner_sid,
 553                                                                  new_sd->group_sid,
 554                                                                  object_list);
 555         }
 556
 557         if (!creator_sd || (inherit_flags & SEC_DEFAULT_DESCRIPTOR)) {
 558                 user_dacl = NULL;
 559                 user_sacl = NULL;
 560         } else {
 561                 user_dacl = process_user_acl(new_sd,
 562                                              creator_sd->dacl,
 563                                              is_container,
 564                                              new_sd->owner_sid,
 565                                              new_sd->group_sid,
 566                                              object_list,
 567                                              creator_sd->type & SEC_DESC_DACL_PROTECTED);
 568                 user_sacl = process_user_acl(new_sd,
 569                                              creator_sd->sacl,
 570                                              is_container,
 571                                              new_sd->owner_sid,
 572                                              new_sd->group_sid,
 573                                              object_list,
 574                                              creator_sd->type & SEC_DESC_SACL_PROTECTED);
 575         }
 576         cr_descr_log_descriptor(parent_sd, __location__"parent_sd", level);
 577         cr_descr_log_descriptor(creator_sd,__location__ "creator_sd", level);
 578
 579         new_sd->dacl = security_acl_concatenate(new_sd, user_dacl, inherited_dacl);
 580         if (new_sd->dacl) {
 581                 new_sd->type |= SEC_DESC_DACL_PRESENT;
 582         }
 583         if (inherited_dacl) {
 584                 new_sd->type |= SEC_DESC_DACL_AUTO_INHERITED;
 585         }
 586
 587         new_sd->sacl = security_acl_concatenate(new_sd, user_sacl, inherited_sacl);
 588         if (new_sd->sacl) {
 589                 new_sd->type |= SEC_DESC_SACL_PRESENT;
 590         }
 591         if (inherited_sacl) {
 592                 new_sd->type |= SEC_DESC_SACL_AUTO_INHERITED;
 593         }
 594         /* This is a hack to handle the fact that
 595          * apprantly any AI flag provided by the user is preserved */
 596         if (creator_sd)
 597                 new_sd->type |= creator_sd->type;
 598         cr_descr_log_descriptor(new_sd, __location__"final sd", level);
 599         return true;
 600 }
 601
 602 struct security_descriptor *create_security_descriptor(TALLOC_CTX *mem_ctx,
 603                                                        struct security_descriptor *parent_sd,
 604                                                        struct security_descriptor *creator_sd,
 605                                                        bool is_container,
 606                                                        struct GUID *object_list,
 607                                                        uint32_t inherit_flags,
 608                                                        struct security_token *token,
 609                                                        struct dom_sid *default_owner, /* valid only for DS, NULL for the other RSs */
 610                                                        struct dom_sid *default_group, /* valid only for DS, NULL for the other RSs */
 611                                                        uint32_t (*generic_map)(uint32_t access_mask))
 612 {
 613         struct security_descriptor *new_sd;
 614         struct dom_sid *new_owner = NULL;
 615         struct dom_sid *new_group = NULL;
 616
 617         new_sd = security_descriptor_initialise(mem_ctx);
 618         if (!new_sd) {
 619                 return NULL;
 620         }
 621
 622         if (!creator_sd || !creator_sd->owner_sid) {
 623                 if ((inherit_flags & SEC_OWNER_FROM_PARENT) && parent_sd) {
 624                         new_owner = parent_sd->owner_sid;
 625                 } else if (!default_owner) {
 626                         new_owner = &token->sids[PRIMARY_USER_SID_INDEX];
 627                 } else {
 628                         new_owner = default_owner;
 629                         new_sd->type |= SEC_DESC_OWNER_DEFAULTED;
 630                 }
 631         } else {
 632                 new_owner = creator_sd->owner_sid;
 633         }
 634
 635         if (!creator_sd || !creator_sd->group_sid){
 636                 if ((inherit_flags & SEC_GROUP_FROM_PARENT) && parent_sd) {
 637                         new_group = parent_sd->group_sid;
 638                 } else if (!default_group && token->num_sids > PRIMARY_GROUP_SID_INDEX) {
 639                         new_group = &token->sids[PRIMARY_GROUP_SID_INDEX];
 640                 } else if (!default_group) {
 641                         /* This will happen only for anonymous, which has no other groups */
 642                         new_group = &token->sids[PRIMARY_USER_SID_INDEX];
 643                 } else {
 644                         new_group = default_group;
 645                         new_sd->type |= SEC_DESC_GROUP_DEFAULTED;
 646                 }
 647         } else {
 648                 new_group = creator_sd->group_sid;
 649         }
 650
 651         new_sd->owner_sid = talloc_memdup(new_sd, new_owner, sizeof(struct dom_sid));
 652         new_sd->group_sid = talloc_memdup(new_sd, new_group, sizeof(struct dom_sid));
 653         if (!new_sd->owner_sid || !new_sd->group_sid){
 654                 talloc_free(new_sd);
 655                 return NULL;
 656         }
 657
 658         if (!compute_acl(parent_sd, creator_sd,
 659                          is_container, inherit_flags, object_list,
 660                          generic_map,token,new_sd)){
 661                 talloc_free(new_sd);
 662                 return NULL;
 663         }
 664
 665         return new_sd;
 666 }