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 contains 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                                 const struct dom_sid *owner,
 128                                 const 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(
 141         TALLOC_CTX *mem_ctx,
 142         struct security_acl *acl,
 143         bool is_container,
 144         const struct dom_sid *owner,
 145         const struct dom_sid *group,
 146         struct GUID *object_list)
 147 {
 148         uint32_t i;
 149         struct security_acl *tmp_acl = NULL;
 150
 151         if (!acl) {
 152                 return NULL;
 153         }
 154         tmp_acl = talloc_zero(mem_ctx, struct security_acl);
 155         if (!tmp_acl) {
 156                 return NULL;
 157         }
 158
 159         for (i=0; i < acl->num_aces; i++) {
 160                 const struct security_ace *ace = &acl->aces[i];
 161                 const struct GUID *inherited_object = NULL;
 162                 const struct GUID *inherited_property = NULL;
 163                 struct security_ace *tmp_ace = NULL;
 164                 bool applies = false;
 165                 bool inherited_only = false;
 166                 bool expand_ace = false;
 167                 bool expand_only = false;
 168
 169                 if (is_container && (ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 170                         applies = true;
 171                 } else if (!is_container && (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
 172                         applies = true;
 173                 }
 174
 175                 if (!applies) {
 176                         /*
 177                          * If the ace doesn't apply to the
 178                          * current node, we should only keep
 179                          * it as SEC_ACE_FLAG_OBJECT_INHERIT
 180                          * on a container. We'll add
 181                          * SEC_ACE_FLAG_INHERITED_ACE
 182                          * and SEC_ACE_FLAG_INHERIT_ONLY below.
 183                          *
 184                          * Otherwise we should completely ignore it.
 185                          */
 186                         if (!(ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)) {
 187                                 continue;
 188                         }
 189                 }
 190
 191                 switch (ace->type) {
 192                 case SEC_ACE_TYPE_ACCESS_ALLOWED:
 193                 case SEC_ACE_TYPE_ACCESS_DENIED:
 194                 case SEC_ACE_TYPE_SYSTEM_AUDIT:
 195                 case SEC_ACE_TYPE_SYSTEM_ALARM:
 196                 case SEC_ACE_TYPE_ALLOWED_COMPOUND:
 197                         break;
 198
 199                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 200                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 201                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 202                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 203                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK_OBJECT:
 204                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK_OBJECT:
 205                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK_OBJECT:
 206                         if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
 207                                 inherited_property = &ace->object.object.type.type;
 208                         }
 209                         if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
 210                                 inherited_object = &ace->object.object.inherited_type.inherited_type;
 211                         }
 212
 213                         if (inherited_object != NULL && !object_in_list(object_list, inherited_object)) {
 214                                 /*
 215                                  * An explicit object class schemaId is given,
 216                                  * but doesn't belong to the current object.
 217                                  */
 218                                 applies = false;
 219                         }
 220
 221                         break;
 222
 223                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK:
 224                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK:
 225                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK:
 226                         break;
 227                 case SEC_ACE_TYPE_SYSTEM_RESOURCE_ATTRIBUTE:
 228                         break;
 229                 case SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK:
 230                 case SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK_OBJECT:
 231                 case SEC_ACE_TYPE_SYSTEM_MANDATORY_LABEL:
 232                 case SEC_ACE_TYPE_SYSTEM_SCOPED_POLICY_ID:
 233                 default:
 234                         DBG_WARNING("ACE type %d is not handled\n", ace->type);
 235                         TALLOC_FREE(tmp_acl);
 236                         return NULL;
 237                 }
 238
 239                 if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
 240                         if (!applies) {
 241                                 /*
 242                                  * If the ACE doesn't apply to
 243                                  * the current object, we should
 244                                  * ignore it as it should not be
 245                                  * inherited any further
 246                                  */
 247                                 continue;
 248                         }
 249                         /*
 250                          * We should only keep the expanded version
 251                          * of the ACE on the current object.
 252                          */
 253                         expand_ace = true;
 254                         expand_only = true;
 255                 } else if (applies) {
 256                         /*
 257                          * We check if should also add
 258                          * the expanded version of the ACE
 259                          * in addition, in case we should
 260                          * expand generic access bits or
 261                          * special sids.
 262                          *
 263                          * In that case we need to
 264                          * keep the original ACE with
 265                          * SEC_ACE_FLAG_INHERIT_ONLY.
 266                          */
 267                         expand_ace = desc_ace_has_generic(ace);
 268                         if (expand_ace) {
 269                                 inherited_only = true;
 270                         }
 271                 } else {
 272                         /*
 273                          * If the ACE doesn't apply
 274                          * to the current object,
 275                          * we need to keep it with
 276                          * SEC_ACE_FLAG_INHERIT_ONLY
 277                          * in order to apply them to
 278                          * grandchildren
 279                          */
 280                         inherited_only = true;
 281                 }
 282
 283                 if (expand_ace) {
 284                         tmp_acl->aces = talloc_realloc(tmp_acl,
 285                                                        tmp_acl->aces,
 286                                                        struct security_ace,
 287                                                        tmp_acl->num_aces+1);
 288                         if (tmp_acl->aces == NULL) {
 289                                 TALLOC_FREE(tmp_acl);
 290                                 return NULL;
 291                         }
 292
 293                         tmp_ace = &tmp_acl->aces[tmp_acl->num_aces];
 294                         tmp_acl->num_aces++;
 295
 296                         *tmp_ace = *ace;
 297
 298                         /*
 299                          * Expand generic access bits as well as special
 300                          * sids.
 301                          */
 302                         desc_expand_generic(tmp_ace, owner, group);
 303
 304                         /*
 305                          * Expanded ACEs are marked as inherited,
 306                          * but never inherited any further to
 307                          * grandchildren.
 308                          */
 309                         tmp_ace->flags |= SEC_ACE_FLAG_INHERITED_ACE;
 310                         tmp_ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
 311                         tmp_ace->flags &= ~SEC_ACE_FLAG_OBJECT_INHERIT;
 312                         tmp_ace->flags &= ~SEC_ACE_FLAG_NO_PROPAGATE_INHERIT;
 313
 314                         /*
 315                          * Expanded ACEs never have an explicit
 316                          * object class schemaId, so clear it
 317                          * if present.
 318                          */
 319                         if (inherited_object != NULL) {
 320                                 tmp_ace->object.object.flags &= ~SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT;
 321                         }
 322
 323                         /*
 324                          * If the ACE had an explicit object class
 325                          * schemaId, but no attribute/propertySet
 326                          * we need to downgrade the _OBJECT variants
 327                          * to the normal ones.
 328                          */
 329                         if (inherited_property == NULL) {
 330                                 switch (tmp_ace->type) {
 331                                 case SEC_ACE_TYPE_ACCESS_ALLOWED:
 332                                 case SEC_ACE_TYPE_ACCESS_DENIED:
 333                                 case SEC_ACE_TYPE_SYSTEM_AUDIT:
 334                                 case SEC_ACE_TYPE_SYSTEM_ALARM:
 335                                 case SEC_ACE_TYPE_ALLOWED_COMPOUND:
 336                                         break;
 337                                 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
 338                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_ALLOWED;
 339                                         break;
 340                                 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
 341                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_DENIED;
 342                                         break;
 343                                 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
 344                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_ALARM;
 345                                         break;
 346                                 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
 347                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_AUDIT;
 348                                         break;
 349                                 case SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK_OBJECT:
 350                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_ALLOWED_CALLBACK;
 351                                         break;
 352                                 case SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK_OBJECT:
 353                                         tmp_ace->type = SEC_ACE_TYPE_ACCESS_DENIED_CALLBACK;
 354                                         break;
 355                                 case SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK_OBJECT:
 356                                         tmp_ace->type = SEC_ACE_TYPE_SYSTEM_AUDIT_CALLBACK;
 357                                         break;
 358                                 default:
 359                                         /*
 360                                          * SEC_ACE_TYPE_SYSTEM_ALARM_CALLBACK_OBJECT
 361                                          * is reserved.
 362                                          */
 363                                         break;
 364                                 }
 365                         }
 366
 367                         if (expand_only) {
 368                                 continue;
 369                         }
 370                 }
 371
 372                 tmp_acl->aces = talloc_realloc(tmp_acl,
 373                                                tmp_acl->aces,
 374                                                struct security_ace,
 375                                                tmp_acl->num_aces+1);
 376                 if (tmp_acl->aces == NULL) {
 377                         TALLOC_FREE(tmp_acl);
 378                         return NULL;
 379                 }
 380
 381                 tmp_ace = &tmp_acl->aces[tmp_acl->num_aces];
 382                 tmp_acl->num_aces++;
 383
 384                 *tmp_ace = *ace;
 385                 tmp_ace->flags |= SEC_ACE_FLAG_INHERITED_ACE;
 386
 387                 if (inherited_only) {
 388                         tmp_ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
 389                 } else {
 390                         tmp_ace->flags &= ~SEC_ACE_FLAG_INHERIT_ONLY;
 391                 }
 392
 393                 if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT) {
 394                         tmp_ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
 395                         tmp_ace->flags &= ~SEC_ACE_FLAG_OBJECT_INHERIT;
 396                         tmp_ace->flags &= ~SEC_ACE_FLAG_NO_PROPAGATE_INHERIT;
 397                 }
 398         }
 399         if (tmp_acl->num_aces == 0) {
 400                 TALLOC_FREE(tmp_acl);
 401                 return NULL;
 402         }
 403         if (acl) {
 404                 tmp_acl->revision = acl->revision;
 405         }
 406         return tmp_acl;
 407 }
 408
 409 static struct security_acl *process_user_acl(TALLOC_CTX *mem_ctx,
 410                                              struct security_acl *acl,
 411                                              bool is_container,
 412                                              const struct dom_sid *owner,
 413                                              const struct dom_sid *group,
 414                                              struct GUID *object_list,
 415                                              bool is_protected)
 416 {
 417         uint32_t i;
 418         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 419         struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
 420         struct security_acl *new_acl;
 421
 422         if (!acl)
 423                 return NULL;
 424
 425         if (!tmp_acl)
 426                 return NULL;
 427
 428         tmp_acl->revision = acl->revision;
 429         DBG_DEBUG("acl revision %d\n", acl->revision);
 430
 431         for (i=0; i < acl->num_aces; i++){
 432                 struct security_ace *ace = &acl->aces[i];
 433                 /* Remove ID flags from user-provided ACEs
 434                  * if we break inheritance, ignore them otherwise */
 435                 if (ace->flags & SEC_ACE_FLAG_INHERITED_ACE) {
 436                         if (is_protected) {
 437                                 ace->flags &= ~SEC_ACE_FLAG_INHERITED_ACE;
 438                         } else {
 439                                 continue;
 440                         }
 441                 }
 442
 443                 if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY &&
 444                     !(ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT ||
 445                       ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
 446                         continue;
 447
 448                 tmp_acl->aces = talloc_realloc(tmp_acl,
 449                                                tmp_acl->aces,
 450                                                struct security_ace,
 451                                                tmp_acl->num_aces+1);
 452                 tmp_acl->aces[tmp_acl->num_aces] = *ace;
 453                 tmp_acl->num_aces++;
 454                 if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY) {
 455                         continue;
 456                 }
 457                 /* if the ACE contains CO, CG, GA, GE, GR or GW, and is inheritable
 458                  * it has to be expanded to two aces, the original as IO,
 459                  * and another one where these are translated */
 460                 if (desc_ace_has_generic(ace)) {
 461                         if (!(ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
 462                                 desc_expand_generic(&tmp_acl->aces[tmp_acl->num_aces-1],
 463                                                     owner,
 464                                                     group);
 465                         } else {
 466                                 /*The original ACE becomes read only */
 467                                 tmp_acl->aces[tmp_acl->num_aces-1].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
 468                                 tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces,
 469                                                                struct security_ace,
 470                                                                tmp_acl->num_aces+1);
 471                                 /* add a new ACE with expanded generic info */
 472                                 tmp_acl->aces[tmp_acl->num_aces] = *ace;
 473                                 desc_expand_generic(&tmp_acl->aces[tmp_acl->num_aces],
 474                                                     owner,
 475                                                     group);
 476                                 tmp_acl->num_aces++;
 477                         }
 478                 }
 479         }
 480         new_acl = security_acl_dup(mem_ctx,tmp_acl);
 481
 482         if (new_acl)
 483                 new_acl->revision = acl->revision;
 484
 485         talloc_free(tmp_ctx);
 486         return new_acl;
 487 }
 488
 489 static void cr_descr_log_descriptor(struct security_descriptor *sd,
 490                                     const char *message,
 491                                     int level)
 492 {
 493         if (sd) {
 494                 DEBUG(level,("%s: %s\n", message,
 495                              ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_descriptor,
 496                                                      "", sd)));
 497         }
 498         else {
 499                 DEBUG(level,("%s: NULL\n", message));
 500         }
 501 }
 502
 503 #if 0
 504 static void cr_descr_log_acl(struct security_acl *acl,
 505                                     const char *message,
 506                                     int level)
 507 {
 508         if (acl) {
 509                 DEBUG(level,("%s: %s\n", message,
 510                              ndr_print_struct_string(0,(ndr_print_fn_t)ndr_print_security_acl,
 511                                                      "", acl)));
 512         }
 513         else {
 514                 DEBUG(level,("%s: NULL\n", message));
 515         }
 516 }
 517 #endif
 518
 519 static bool compute_acl(struct security_descriptor *parent_sd,
 520                         struct security_descriptor *creator_sd,
 521                         bool is_container,
 522                         uint32_t inherit_flags,
 523                         struct GUID *object_list,
 524                         uint32_t (*generic_map)(uint32_t access_mask),
 525                         struct security_token *token,
 526                         struct security_descriptor *new_sd) /* INOUT argument */
 527 {
 528         struct security_acl *user_dacl, *user_sacl, *inherited_dacl, *inherited_sacl;
 529         int level = 10;
 530
 531         if (!parent_sd || !(inherit_flags & SEC_DACL_AUTO_INHERIT)) {
 532                 inherited_dacl = NULL;
 533         } else if (creator_sd && (creator_sd->type & SEC_DESC_DACL_PROTECTED)) {
 534                 inherited_dacl = NULL;
 535         } else {
 536                 inherited_dacl = calculate_inherited_from_parent(new_sd,
 537                                                                  parent_sd->dacl,
 538                                                                  is_container,
 539                                                                  new_sd->owner_sid,
 540                                                                  new_sd->group_sid,
 541                                                                  object_list);
 542         }
 543
 544
 545         if (!parent_sd || !(inherit_flags & SEC_SACL_AUTO_INHERIT)) {
 546                 inherited_sacl = NULL;
 547         } else if (creator_sd && (creator_sd->type & SEC_DESC_SACL_PROTECTED)) {
 548                 inherited_sacl = NULL;
 549         } else {
 550                 inherited_sacl = calculate_inherited_from_parent(new_sd,
 551                                                                  parent_sd->sacl,
 552                                                                  is_container,
 553                                                                  new_sd->owner_sid,
 554                                                                  new_sd->group_sid,
 555                                                                  object_list);
 556         }
 557
 558         if (!creator_sd || (inherit_flags & SEC_DEFAULT_DESCRIPTOR)) {
 559                 user_dacl = NULL;
 560                 user_sacl = NULL;
 561         } else {
 562                 user_dacl = process_user_acl(new_sd,
 563                                              creator_sd->dacl,
 564                                              is_container,
 565                                              new_sd->owner_sid,
 566                                              new_sd->group_sid,
 567                                              object_list,
 568                                              creator_sd->type & SEC_DESC_DACL_PROTECTED);
 569                 user_sacl = process_user_acl(new_sd,
 570                                              creator_sd->sacl,
 571                                              is_container,
 572                                              new_sd->owner_sid,
 573                                              new_sd->group_sid,
 574                                              object_list,
 575                                              creator_sd->type & SEC_DESC_SACL_PROTECTED);
 576         }
 577         cr_descr_log_descriptor(parent_sd, __location__"parent_sd", level);
 578         cr_descr_log_descriptor(creator_sd,__location__ "creator_sd", level);
 579
 580         new_sd->dacl = security_acl_concatenate(new_sd, user_dacl, inherited_dacl);
 581         if (new_sd->dacl) {
 582                 new_sd->type |= SEC_DESC_DACL_PRESENT;
 583         }
 584         if (inherited_dacl) {
 585                 new_sd->type |= SEC_DESC_DACL_AUTO_INHERITED;
 586         }
 587
 588         new_sd->sacl = security_acl_concatenate(new_sd, user_sacl, inherited_sacl);
 589         if (new_sd->sacl) {
 590                 new_sd->type |= SEC_DESC_SACL_PRESENT;
 591         }
 592         if (inherited_sacl) {
 593                 new_sd->type |= SEC_DESC_SACL_AUTO_INHERITED;
 594         }
 595         /* This is a hack to handle the fact that
 596          * apprantly any AI flag provided by the user is preserved */
 597         if (creator_sd)
 598                 new_sd->type |= creator_sd->type;
 599         cr_descr_log_descriptor(new_sd, __location__"final sd", level);
 600         return true;
 601 }
 602
 603 struct security_descriptor *create_security_descriptor(
 604         TALLOC_CTX *mem_ctx,
 605         struct security_descriptor *parent_sd,
 606         struct security_descriptor *creator_sd,
 607         bool is_container,
 608         struct GUID *object_list,
 609         uint32_t inherit_flags,
 610         struct security_token *token,
 611         const struct dom_sid
 612                 *default_owner, /* valid only for DS, NULL for the other RSs */
 613         const struct dom_sid
 614                 *default_group, /* valid only for DS, NULL for the other RSs */
 615         uint32_t (*generic_map)(uint32_t access_mask))
 616 {
 617         struct security_descriptor *new_sd;
 618         const struct dom_sid *new_owner = NULL;
 619         const struct dom_sid *new_group = NULL;
 620
 621         new_sd = security_descriptor_initialise(mem_ctx);
 622         if (!new_sd) {
 623                 return NULL;
 624         }
 625
 626         if (!creator_sd || !creator_sd->owner_sid) {
 627                 if ((inherit_flags & SEC_OWNER_FROM_PARENT) && parent_sd) {
 628                         new_owner = parent_sd->owner_sid;
 629                 } else if (!default_owner) {
 630                         new_owner = &token->sids[PRIMARY_USER_SID_INDEX];
 631                 } else {
 632                         new_owner = default_owner;
 633                         new_sd->type |= SEC_DESC_OWNER_DEFAULTED;
 634                 }
 635         } else {
 636                 new_owner = creator_sd->owner_sid;
 637         }
 638
 639         if (!creator_sd || !creator_sd->group_sid){
 640                 if ((inherit_flags & SEC_GROUP_FROM_PARENT) && parent_sd) {
 641                         new_group = parent_sd->group_sid;
 642                 } else if (!default_group && token->num_sids > PRIMARY_GROUP_SID_INDEX) {
 643                         new_group = &token->sids[PRIMARY_GROUP_SID_INDEX];
 644                 } else if (!default_group) {
 645                         /* This will happen only for anonymous, which has no other groups */
 646                         new_group = &token->sids[PRIMARY_USER_SID_INDEX];
 647                 } else {
 648                         new_group = default_group;
 649                         new_sd->type |= SEC_DESC_GROUP_DEFAULTED;
 650                 }
 651         } else {
 652                 new_group = creator_sd->group_sid;
 653         }
 654
 655         new_sd->owner_sid = dom_sid_dup(new_sd, new_owner);
 656         new_sd->group_sid = dom_sid_dup(new_sd, new_group);
 657         if (!new_sd->owner_sid || !new_sd->group_sid){
 658                 talloc_free(new_sd);
 659                 return NULL;
 660         }
 661
 662         if (!compute_acl(parent_sd, creator_sd,
 663                          is_container, inherit_flags, object_list,
 664                          generic_map,token,new_sd)){
 665                 talloc_free(new_sd);
 666                 return NULL;
 667         }
 668
 669         return new_sd;
 670 }