ntoskrnl/se/sd.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/se/sd.c
   5  * PURPOSE:         Security manager
   6  *
   7  * PROGRAMMERS:     David Welch <welch@cwcom.net>
   8  */
   9
  10 /* INCLUDES *******************************************************************/
  11
  12 #include <ntoskrnl.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 #if defined (ALLOC_PRAGMA)
  17 #pragma alloc_text(INIT, SepInitSDs)
  18 #endif
  19
  20 /* GLOBALS ********************************************************************/
  21
  22 PSECURITY_DESCRIPTOR SePublicDefaultSd = NULL;
  23 PSECURITY_DESCRIPTOR SePublicDefaultUnrestrictedSd = NULL;
  24 PSECURITY_DESCRIPTOR SePublicOpenSd = NULL;
  25 PSECURITY_DESCRIPTOR SePublicOpenUnrestrictedSd = NULL;
  26 PSECURITY_DESCRIPTOR SeSystemDefaultSd = NULL;
  27 PSECURITY_DESCRIPTOR SeUnrestrictedSd = NULL;
  28
  29 /* PRIVATE FUNCTIONS **********************************************************/
  30
  31 BOOLEAN
  32 INIT_FUNCTION
  33 NTAPI
  34 SepInitSDs(VOID)
  35 {
  36     /* Create PublicDefaultSd */
  37     SePublicDefaultSd = ExAllocatePoolWithTag(PagedPool,
  38                                               sizeof(SECURITY_DESCRIPTOR), TAG_SD);
  39     if (SePublicDefaultSd == NULL)
  40         return FALSE;
  41
  42     RtlCreateSecurityDescriptor(SePublicDefaultSd,
  43                                 SECURITY_DESCRIPTOR_REVISION);
  44     RtlSetDaclSecurityDescriptor(SePublicDefaultSd,
  45                                  TRUE,
  46                                  SePublicDefaultDacl,
  47                                  FALSE);
  48
  49     /* Create PublicDefaultUnrestrictedSd */
  50     SePublicDefaultUnrestrictedSd = ExAllocatePoolWithTag(PagedPool,
  51                                                           sizeof(SECURITY_DESCRIPTOR), TAG_SD);
  52     if (SePublicDefaultUnrestrictedSd == NULL)
  53         return FALSE;
  54
  55     RtlCreateSecurityDescriptor(SePublicDefaultUnrestrictedSd,
  56                                 SECURITY_DESCRIPTOR_REVISION);
  57     RtlSetDaclSecurityDescriptor(SePublicDefaultUnrestrictedSd,
  58                                  TRUE,
  59                                  SePublicDefaultUnrestrictedDacl,
  60                                  FALSE);
  61
  62     /* Create PublicOpenSd */
  63     SePublicOpenSd = ExAllocatePoolWithTag(PagedPool,
  64                                            sizeof(SECURITY_DESCRIPTOR), TAG_SD);
  65     if (SePublicOpenSd == NULL)
  66         return FALSE;
  67
  68     RtlCreateSecurityDescriptor(SePublicOpenSd,
  69                                 SECURITY_DESCRIPTOR_REVISION);
  70     RtlSetDaclSecurityDescriptor(SePublicOpenSd,
  71                                  TRUE,
  72                                  SePublicOpenDacl,
  73                                  FALSE);
  74
  75     /* Create PublicOpenUnrestrictedSd */
  76     SePublicOpenUnrestrictedSd = ExAllocatePoolWithTag(PagedPool,
  77                                                        sizeof(SECURITY_DESCRIPTOR), TAG_SD);
  78     if (SePublicOpenUnrestrictedSd == NULL)
  79         return FALSE;
  80
  81     RtlCreateSecurityDescriptor(SePublicOpenUnrestrictedSd,
  82                                 SECURITY_DESCRIPTOR_REVISION);
  83     RtlSetDaclSecurityDescriptor(SePublicOpenUnrestrictedSd,
  84                                  TRUE,
  85                                  SePublicOpenUnrestrictedDacl,
  86                                  FALSE);
  87
  88     /* Create SystemDefaultSd */
  89     SeSystemDefaultSd = ExAllocatePoolWithTag(PagedPool,
  90                                               sizeof(SECURITY_DESCRIPTOR), TAG_SD);
  91     if (SeSystemDefaultSd == NULL)
  92         return FALSE;
  93
  94     RtlCreateSecurityDescriptor(SeSystemDefaultSd,
  95                                 SECURITY_DESCRIPTOR_REVISION);
  96     RtlSetDaclSecurityDescriptor(SeSystemDefaultSd,
  97                                  TRUE,
  98                                  SeSystemDefaultDacl,
  99                                  FALSE);
 100
 101     /* Create UnrestrictedSd */
 102     SeUnrestrictedSd = ExAllocatePoolWithTag(PagedPool,
 103                                              sizeof(SECURITY_DESCRIPTOR), TAG_SD);
 104     if (SeUnrestrictedSd == NULL)
 105         return FALSE;
 106
 107     RtlCreateSecurityDescriptor(SeUnrestrictedSd,
 108                                 SECURITY_DESCRIPTOR_REVISION);
 109     RtlSetDaclSecurityDescriptor(SeUnrestrictedSd,
 110                                  TRUE,
 111                                  SeUnrestrictedDacl,
 112                                  FALSE);
 113
 114     return TRUE;
 115 }
 116
 117 NTSTATUS
 118 NTAPI
 119 SeSetWorldSecurityDescriptor(SECURITY_INFORMATION SecurityInformation,
 120                              PISECURITY_DESCRIPTOR SecurityDescriptor,
 121                              PULONG BufferLength)
 122 {
 123     ULONG Current;
 124     ULONG SidSize;
 125     ULONG SdSize;
 126     NTSTATUS Status;
 127     PISECURITY_DESCRIPTOR_RELATIVE SdRel = (PISECURITY_DESCRIPTOR_RELATIVE)SecurityDescriptor;
 128
 129     DPRINT("SeSetWorldSecurityDescriptor() called\n");
 130
 131     if (SecurityInformation == 0)
 132     {
 133         return STATUS_ACCESS_DENIED;
 134     }
 135
 136     /* calculate the minimum size of the buffer */
 137     SidSize = RtlLengthSid(SeWorldSid);
 138     SdSize = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 139     if (SecurityInformation & OWNER_SECURITY_INFORMATION)
 140         SdSize += SidSize;
 141     if (SecurityInformation & GROUP_SECURITY_INFORMATION)
 142         SdSize += SidSize;
 143     if (SecurityInformation & DACL_SECURITY_INFORMATION)
 144     {
 145         SdSize += sizeof(ACL) + sizeof(ACE) + SidSize;
 146     }
 147
 148     if (*BufferLength < SdSize)
 149     {
 150         *BufferLength = SdSize;
 151         return STATUS_BUFFER_TOO_SMALL;
 152     }
 153
 154     *BufferLength = SdSize;
 155
 156     Status = RtlCreateSecurityDescriptorRelative(SdRel,
 157                                                  SECURITY_DESCRIPTOR_REVISION);
 158     if (!NT_SUCCESS(Status))
 159     {
 160         return Status;
 161     }
 162
 163     Current = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 164
 165     if (SecurityInformation & OWNER_SECURITY_INFORMATION)
 166     {
 167         RtlCopyMemory((PUCHAR)SdRel + Current, SeWorldSid, SidSize);
 168         SdRel->Owner = Current;
 169         Current += SidSize;
 170     }
 171
 172     if (SecurityInformation & GROUP_SECURITY_INFORMATION)
 173     {
 174         RtlCopyMemory((PUCHAR)SdRel + Current, SeWorldSid, SidSize);
 175         SdRel->Group = Current;
 176         Current += SidSize;
 177     }
 178
 179     if (SecurityInformation & DACL_SECURITY_INFORMATION)
 180     {
 181         PACL Dacl = (PACL)((PUCHAR)SdRel + Current);
 182         SdRel->Control |= SE_DACL_PRESENT;
 183
 184         Status = RtlCreateAcl(Dacl,
 185                               sizeof(ACL) + sizeof(ACE) + SidSize,
 186                               ACL_REVISION);
 187         if (!NT_SUCCESS(Status))
 188             return Status;
 189
 190         Status = RtlAddAccessAllowedAce(Dacl,
 191                                         ACL_REVISION,
 192                                         GENERIC_ALL,
 193                                         SeWorldSid);
 194         if (!NT_SUCCESS(Status))
 195             return Status;
 196
 197         SdRel->Dacl = Current;
 198     }
 199
 200     if (SecurityInformation & SACL_SECURITY_INFORMATION)
 201     {
 202         /* FIXME - SdRel->Control |= SE_SACL_PRESENT; */
 203     }
 204
 205     return STATUS_SUCCESS;
 206 }
 207
 208
 209 NTSTATUS
 210 NTAPI
 211 SepCaptureSecurityQualityOfService(IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
 212                                    IN KPROCESSOR_MODE AccessMode,
 213                                    IN POOL_TYPE PoolType,
 214                                    IN BOOLEAN CaptureIfKernel,
 215                                    OUT PSECURITY_QUALITY_OF_SERVICE *CapturedSecurityQualityOfService,
 216                                    OUT PBOOLEAN Present)
 217 {
 218     PSECURITY_QUALITY_OF_SERVICE CapturedQos;
 219     NTSTATUS Status = STATUS_SUCCESS;
 220
 221     PAGED_CODE();
 222
 223     ASSERT(CapturedSecurityQualityOfService);
 224     ASSERT(Present);
 225
 226     if (ObjectAttributes != NULL)
 227     {
 228         if (AccessMode != KernelMode)
 229         {
 230             SECURITY_QUALITY_OF_SERVICE SafeQos;
 231
 232             _SEH2_TRY
 233             {
 234                 ProbeForRead(ObjectAttributes,
 235                              sizeof(OBJECT_ATTRIBUTES),
 236                              sizeof(ULONG));
 237                 if (ObjectAttributes->Length == sizeof(OBJECT_ATTRIBUTES))
 238                 {
 239                     if (ObjectAttributes->SecurityQualityOfService != NULL)
 240                     {
 241                         ProbeForRead(ObjectAttributes->SecurityQualityOfService,
 242                                      sizeof(SECURITY_QUALITY_OF_SERVICE),
 243                                      sizeof(ULONG));
 244
 245                         if (((PSECURITY_QUALITY_OF_SERVICE)ObjectAttributes->SecurityQualityOfService)->Length ==
 246                             sizeof(SECURITY_QUALITY_OF_SERVICE))
 247                         {
 248                             /*
 249                              * Don't allocate memory here because ExAllocate should bugcheck
 250                              * the system if it's buggy, SEH would catch that! So make a local
 251                              * copy of the qos structure.
 252                              */
 253                             RtlCopyMemory(&SafeQos,
 254                                           ObjectAttributes->SecurityQualityOfService,
 255                                           sizeof(SECURITY_QUALITY_OF_SERVICE));
 256                             *Present = TRUE;
 257                         }
 258                         else
 259                         {
 260                             Status = STATUS_INVALID_PARAMETER;
 261                         }
 262                     }
 263                     else
 264                     {
 265                         *CapturedSecurityQualityOfService = NULL;
 266                         *Present = FALSE;
 267                     }
 268                 }
 269                 else
 270                 {
 271                     Status = STATUS_INVALID_PARAMETER;
 272                 }
 273             }
 274             _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 275             {
 276                 Status = _SEH2_GetExceptionCode();
 277             }
 278             _SEH2_END;
 279
 280             if (NT_SUCCESS(Status))
 281             {
 282                 if (*Present)
 283                 {
 284                     CapturedQos = ExAllocatePoolWithTag(PoolType,
 285                                                         sizeof(SECURITY_QUALITY_OF_SERVICE),
 286                                                         TAG_QOS);
 287                     if (CapturedQos != NULL)
 288                     {
 289                         RtlCopyMemory(CapturedQos,
 290                                       &SafeQos,
 291                                       sizeof(SECURITY_QUALITY_OF_SERVICE));
 292                         *CapturedSecurityQualityOfService = CapturedQos;
 293                     }
 294                     else
 295                     {
 296                         Status = STATUS_INSUFFICIENT_RESOURCES;
 297                     }
 298                 }
 299                 else
 300                 {
 301                     *CapturedSecurityQualityOfService = NULL;
 302                 }
 303             }
 304         }
 305         else
 306         {
 307             if (ObjectAttributes->Length == sizeof(OBJECT_ATTRIBUTES))
 308             {
 309                 if (CaptureIfKernel)
 310                 {
 311                     if (ObjectAttributes->SecurityQualityOfService != NULL)
 312                     {
 313                         if (((PSECURITY_QUALITY_OF_SERVICE)ObjectAttributes->SecurityQualityOfService)->Length ==
 314                             sizeof(SECURITY_QUALITY_OF_SERVICE))
 315                         {
 316                             CapturedQos = ExAllocatePoolWithTag(PoolType,
 317                                                                 sizeof(SECURITY_QUALITY_OF_SERVICE),
 318                                                                 TAG_QOS);
 319                             if (CapturedQos != NULL)
 320                             {
 321                                 RtlCopyMemory(CapturedQos,
 322                                               ObjectAttributes->SecurityQualityOfService,
 323                                               sizeof(SECURITY_QUALITY_OF_SERVICE));
 324                                 *CapturedSecurityQualityOfService = CapturedQos;
 325                                 *Present = TRUE;
 326                             }
 327                             else
 328                             {
 329                                 Status = STATUS_INSUFFICIENT_RESOURCES;
 330                             }
 331                         }
 332                         else
 333                         {
 334                             Status = STATUS_INVALID_PARAMETER;
 335                         }
 336                     }
 337                     else
 338                     {
 339                         *CapturedSecurityQualityOfService = NULL;
 340                         *Present = FALSE;
 341                     }
 342                 }
 343                 else
 344                 {
 345                     *CapturedSecurityQualityOfService = (PSECURITY_QUALITY_OF_SERVICE)ObjectAttributes->SecurityQualityOfService;
 346                     *Present = (ObjectAttributes->SecurityQualityOfService != NULL);
 347                 }
 348             }
 349             else
 350             {
 351                 Status = STATUS_INVALID_PARAMETER;
 352             }
 353         }
 354     }
 355     else
 356     {
 357         *CapturedSecurityQualityOfService = NULL;
 358         *Present = FALSE;
 359     }
 360
 361     return Status;
 362 }
 363
 364
 365 VOID
 366 NTAPI
 367 SepReleaseSecurityQualityOfService(IN PSECURITY_QUALITY_OF_SERVICE CapturedSecurityQualityOfService  OPTIONAL,
 368                                    IN KPROCESSOR_MODE AccessMode,
 369                                    IN BOOLEAN CaptureIfKernel)
 370 {
 371     PAGED_CODE();
 372
 373     if (CapturedSecurityQualityOfService != NULL &&
 374         (AccessMode != KernelMode || CaptureIfKernel))
 375     {
 376         ExFreePoolWithTag(CapturedSecurityQualityOfService, TAG_QOS);
 377     }
 378 }
 379
 380 /* PUBLIC FUNCTIONS ***********************************************************/
 381
 382 static
 383 ULONG
 384 DetermineSIDSize(
 385     PISID Sid,
 386     PULONG OutSAC,
 387     KPROCESSOR_MODE ProcessorMode)
 388 {
 389     ULONG Size;
 390
 391     if (!Sid)
 392     {
 393         *OutSAC = 0;
 394         return 0;
 395     }
 396
 397     if (ProcessorMode != KernelMode)
 398     {
 399         /* Securely access the buffers! */
 400         *OutSAC = ProbeForReadUchar(&Sid->SubAuthorityCount);
 401         Size = RtlLengthRequiredSid(*OutSAC);
 402         ProbeForRead(Sid, Size, sizeof(ULONG));
 403     }
 404     else
 405     {
 406         *OutSAC = Sid->SubAuthorityCount;
 407         Size = RtlLengthRequiredSid(*OutSAC);
 408     }
 409
 410     return Size;
 411 }
 412
 413 static
 414 ULONG
 415 DetermineACLSize(
 416     PACL Acl,
 417     KPROCESSOR_MODE ProcessorMode)
 418 {
 419     ULONG Size;
 420
 421     if (!Acl) return 0;
 422
 423     if (ProcessorMode == KernelMode) return Acl->AclSize;
 424
 425     /* Probe the buffers! */
 426     Size = ProbeForReadUshort(&Acl->AclSize);
 427     ProbeForRead(Acl, Size, sizeof(ULONG));
 428
 429     return Size;
 430 }
 431
 432 NTSTATUS
 433 NTAPI
 434 SeCaptureSecurityDescriptor(
 435     IN PSECURITY_DESCRIPTOR _OriginalSecurityDescriptor,
 436     IN KPROCESSOR_MODE CurrentMode,
 437     IN POOL_TYPE PoolType,
 438     IN BOOLEAN CaptureIfKernel,
 439     OUT PSECURITY_DESCRIPTOR *CapturedSecurityDescriptor)
 440 {
 441     PISECURITY_DESCRIPTOR OriginalDescriptor = _OriginalSecurityDescriptor;
 442     SECURITY_DESCRIPTOR DescriptorCopy;
 443     PISECURITY_DESCRIPTOR_RELATIVE NewDescriptor;
 444     ULONG OwnerSAC = 0, GroupSAC = 0;
 445     ULONG OwnerSize = 0, GroupSize = 0;
 446     ULONG SaclSize = 0, DaclSize = 0;
 447     ULONG DescriptorSize = 0;
 448     ULONG Offset;
 449
 450     if (!OriginalDescriptor)
 451     {
 452         /* Nothing to do... */
 453         *CapturedSecurityDescriptor = NULL;
 454         return STATUS_SUCCESS;
 455     }
 456
 457     /* Quick path */
 458     if (CurrentMode == KernelMode && !CaptureIfKernel)
 459     {
 460         /* Check descriptor version */
 461         if (OriginalDescriptor->Revision != SECURITY_DESCRIPTOR_REVISION1)
 462         {
 463             return STATUS_UNKNOWN_REVISION;
 464         }
 465
 466         *CapturedSecurityDescriptor = _OriginalSecurityDescriptor;
 467         return STATUS_SUCCESS;
 468     }
 469
 470     _SEH2_TRY
 471     {
 472         if (CurrentMode != KernelMode)
 473         {
 474             ProbeForRead(OriginalDescriptor,
 475                          sizeof(SECURITY_DESCRIPTOR_RELATIVE),
 476                          sizeof(ULONG));
 477         }
 478
 479         /* Check the descriptor version */
 480         if (OriginalDescriptor->Revision != SECURITY_DESCRIPTOR_REVISION1)
 481         {
 482             _SEH2_YIELD(return STATUS_UNKNOWN_REVISION);
 483         }
 484
 485         if (CurrentMode != KernelMode)
 486         {
 487             /* Get the size of the descriptor */
 488             DescriptorSize = (OriginalDescriptor->Control & SE_SELF_RELATIVE) ?
 489                 sizeof(SECURITY_DESCRIPTOR_RELATIVE) : sizeof(SECURITY_DESCRIPTOR);
 490
 491             /* Probe the entire security descriptor structure. The SIDs
 492              * and ACLs will be probed and copied later though */
 493             ProbeForRead(OriginalDescriptor, DescriptorSize, sizeof(ULONG));
 494         }
 495
 496         /* Now capture all fields and convert to an absolute descriptor */
 497         DescriptorCopy.Revision = OriginalDescriptor->Revision;
 498         DescriptorCopy.Sbz1 = OriginalDescriptor->Sbz1;
 499         DescriptorCopy.Control = OriginalDescriptor->Control & ~SE_SELF_RELATIVE;
 500         DescriptorCopy.Owner = SepGetOwnerFromDescriptor(OriginalDescriptor);
 501         DescriptorCopy.Group = SepGetGroupFromDescriptor(OriginalDescriptor);
 502         DescriptorCopy.Sacl = SepGetSaclFromDescriptor(OriginalDescriptor);
 503         DescriptorCopy.Dacl = SepGetDaclFromDescriptor(OriginalDescriptor);
 504         DescriptorSize = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 505
 506         /* Determine owner and group sizes */
 507         OwnerSize = DetermineSIDSize(DescriptorCopy.Owner, &OwnerSAC, CurrentMode);
 508         DescriptorSize += ROUND_UP(OwnerSize, sizeof(ULONG));
 509         GroupSize = DetermineSIDSize(DescriptorCopy.Group, &GroupSAC, CurrentMode);
 510         DescriptorSize += ROUND_UP(GroupSize, sizeof(ULONG));
 511
 512         /* Determine the size of the ACLs */
 513         if (DescriptorCopy.Control & SE_SACL_PRESENT)
 514         {
 515             /* Get the size and probe if user mode */
 516             SaclSize = DetermineACLSize(DescriptorCopy.Sacl, CurrentMode);
 517             DescriptorSize += ROUND_UP(SaclSize, sizeof(ULONG));
 518         }
 519
 520         if (DescriptorCopy.Control & SE_DACL_PRESENT)
 521         {
 522             /* Get the size and probe if user mode */
 523             DaclSize = DetermineACLSize(DescriptorCopy.Dacl, CurrentMode);
 524             DescriptorSize += ROUND_UP(DaclSize, sizeof(ULONG));
 525         }
 526     }
 527     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 528     {
 529         _SEH2_YIELD(return _SEH2_GetExceptionCode());
 530     }
 531     _SEH2_END;
 532
 533     /*
 534      * Allocate enough memory to store a complete copy of a self-relative
 535      * security descriptor
 536      */
 537     NewDescriptor = ExAllocatePoolWithTag(PoolType,
 538                                           DescriptorSize,
 539                                           TAG_SD);
 540     if (!NewDescriptor) return STATUS_INSUFFICIENT_RESOURCES;
 541
 542     RtlZeroMemory(NewDescriptor, DescriptorSize);
 543     NewDescriptor->Revision = DescriptorCopy.Revision;
 544     NewDescriptor->Sbz1 = DescriptorCopy.Sbz1;
 545     NewDescriptor->Control = DescriptorCopy.Control | SE_SELF_RELATIVE;
 546
 547     _SEH2_TRY
 548     {
 549         /*
 550          * Setup the offsets and copy the SIDs and ACLs to the new
 551          * self-relative security descriptor. Probing the pointers is not
 552          * neccessary anymore as we did that when collecting the sizes!
 553          * Make sure to validate the SIDs and ACLs *again* as they could have
 554          * been modified in the meanwhile!
 555          */
 556         Offset = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 557
 558         if (DescriptorCopy.Owner)
 559         {
 560             if (!RtlValidSid(DescriptorCopy.Owner)) RtlRaiseStatus(STATUS_INVALID_SID);
 561             NewDescriptor->Owner = Offset;
 562             RtlCopyMemory((PUCHAR)NewDescriptor + Offset,
 563                           DescriptorCopy.Owner,
 564                           OwnerSize);
 565             Offset += ROUND_UP(OwnerSize, sizeof(ULONG));
 566         }
 567
 568         if (DescriptorCopy.Group)
 569         {
 570             if (!RtlValidSid(DescriptorCopy.Group)) RtlRaiseStatus(STATUS_INVALID_SID);
 571             NewDescriptor->Group = Offset;
 572             RtlCopyMemory((PUCHAR)NewDescriptor + Offset,
 573                           DescriptorCopy.Group,
 574                           GroupSize);
 575             Offset += ROUND_UP(GroupSize, sizeof(ULONG));
 576         }
 577
 578         if (DescriptorCopy.Sacl)
 579         {
 580             if (!RtlValidAcl(DescriptorCopy.Sacl)) RtlRaiseStatus(STATUS_INVALID_ACL);
 581             NewDescriptor->Sacl = Offset;
 582             RtlCopyMemory((PUCHAR)NewDescriptor + Offset,
 583                           DescriptorCopy.Sacl,
 584                           SaclSize);
 585             Offset += ROUND_UP(SaclSize, sizeof(ULONG));
 586         }
 587
 588         if (DescriptorCopy.Dacl)
 589         {
 590             if (!RtlValidAcl(DescriptorCopy.Dacl)) RtlRaiseStatus(STATUS_INVALID_ACL);
 591             NewDescriptor->Dacl = Offset;
 592             RtlCopyMemory((PUCHAR)NewDescriptor + Offset,
 593                           DescriptorCopy.Dacl,
 594                           DaclSize);
 595             Offset += ROUND_UP(DaclSize, sizeof(ULONG));
 596         }
 597
 598         /* Make sure the size was correct */
 599         ASSERT(Offset == DescriptorSize);
 600     }
 601     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 602     {
 603         /* We failed to copy the data to the new descriptor */
 604         ExFreePoolWithTag(NewDescriptor, TAG_SD);
 605         _SEH2_YIELD(return _SEH2_GetExceptionCode());
 606     }
 607     _SEH2_END;
 608
 609     /*
 610      * We're finally done!
 611      * Copy the pointer to the captured descriptor to to the caller.
 612      */
 613     *CapturedSecurityDescriptor = NewDescriptor;
 614     return STATUS_SUCCESS;
 615 }
 616
 617 /*
 618  * @implemented
 619  */
 620 _IRQL_requires_max_(PASSIVE_LEVEL)
 621 NTSTATUS
 622 NTAPI
 623 SeQuerySecurityDescriptorInfo(
 624     _In_ PSECURITY_INFORMATION SecurityInformation,
 625     _Out_writes_bytes_(*Length) PSECURITY_DESCRIPTOR SecurityDescriptor,
 626     _Inout_ PULONG Length,
 627     _Inout_ PSECURITY_DESCRIPTOR *ObjectsSecurityDescriptor)
 628 {
 629     PISECURITY_DESCRIPTOR ObjectSd;
 630     PISECURITY_DESCRIPTOR_RELATIVE RelSD;
 631     PSID Owner = NULL;
 632     PSID Group = NULL;
 633     PACL Dacl = NULL;
 634     PACL Sacl = NULL;
 635     ULONG OwnerLength = 0;
 636     ULONG GroupLength = 0;
 637     ULONG DaclLength = 0;
 638     ULONG SaclLength = 0;
 639     SECURITY_DESCRIPTOR_CONTROL Control = 0;
 640     ULONG_PTR Current;
 641     ULONG SdLength;
 642
 643     PAGED_CODE();
 644
 645     RelSD = (PISECURITY_DESCRIPTOR_RELATIVE)SecurityDescriptor;
 646
 647     if (*ObjectsSecurityDescriptor == NULL)
 648     {
 649         if (*Length < sizeof(SECURITY_DESCRIPTOR_RELATIVE))
 650         {
 651             *Length = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 652             return STATUS_BUFFER_TOO_SMALL;
 653         }
 654
 655         *Length = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 656         RtlCreateSecurityDescriptorRelative(RelSD,
 657                                             SECURITY_DESCRIPTOR_REVISION);
 658         return STATUS_SUCCESS;
 659     }
 660
 661     ObjectSd = *ObjectsSecurityDescriptor;
 662
 663     /* Calculate the required security descriptor length */
 664     Control = SE_SELF_RELATIVE;
 665     if ((*SecurityInformation & OWNER_SECURITY_INFORMATION) &&
 666         (ObjectSd->Owner != NULL))
 667     {
 668         Owner = (PSID)((ULONG_PTR)ObjectSd->Owner + (ULONG_PTR)ObjectSd);
 669         OwnerLength = ROUND_UP(RtlLengthSid(Owner), 4);
 670         Control |= (ObjectSd->Control & SE_OWNER_DEFAULTED);
 671     }
 672
 673     if ((*SecurityInformation & GROUP_SECURITY_INFORMATION) &&
 674         (ObjectSd->Group != NULL))
 675     {
 676         Group = (PSID)((ULONG_PTR)ObjectSd->Group + (ULONG_PTR)ObjectSd);
 677         GroupLength = ROUND_UP(RtlLengthSid(Group), 4);
 678         Control |= (ObjectSd->Control & SE_GROUP_DEFAULTED);
 679     }
 680
 681     if ((*SecurityInformation & DACL_SECURITY_INFORMATION) &&
 682         (ObjectSd->Control & SE_DACL_PRESENT))
 683     {
 684         if (ObjectSd->Dacl != NULL)
 685         {
 686             Dacl = (PACL)((ULONG_PTR)ObjectSd->Dacl + (ULONG_PTR)ObjectSd);
 687             DaclLength = ROUND_UP((ULONG)Dacl->AclSize, 4);
 688         }
 689
 690         Control |= (ObjectSd->Control & (SE_DACL_DEFAULTED | SE_DACL_PRESENT));
 691     }
 692
 693     if ((*SecurityInformation & SACL_SECURITY_INFORMATION) &&
 694         (ObjectSd->Control & SE_SACL_PRESENT))
 695     {
 696         if (ObjectSd->Sacl != NULL)
 697         {
 698             Sacl = (PACL)((ULONG_PTR)ObjectSd->Sacl + (ULONG_PTR)ObjectSd);
 699             SaclLength = ROUND_UP(Sacl->AclSize, 4);
 700         }
 701
 702         Control |= (ObjectSd->Control & (SE_SACL_DEFAULTED | SE_SACL_PRESENT));
 703     }
 704
 705     SdLength = OwnerLength + GroupLength + DaclLength +
 706     SaclLength + sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 707     if (*Length < SdLength)
 708     {
 709         *Length = SdLength;
 710         return STATUS_BUFFER_TOO_SMALL;
 711     }
 712
 713     /* Build the new security descrtiptor */
 714     RtlCreateSecurityDescriptorRelative(RelSD,
 715                                         SECURITY_DESCRIPTOR_REVISION);
 716     RelSD->Control = Control;
 717
 718     Current = (ULONG_PTR)(RelSD + 1);
 719
 720     if (OwnerLength != 0)
 721     {
 722         RtlCopyMemory((PVOID)Current,
 723                       Owner,
 724                       OwnerLength);
 725         RelSD->Owner = (ULONG)(Current - (ULONG_PTR)SecurityDescriptor);
 726         Current += OwnerLength;
 727     }
 728
 729     if (GroupLength != 0)
 730     {
 731         RtlCopyMemory((PVOID)Current,
 732                       Group,
 733                       GroupLength);
 734         RelSD->Group = (ULONG)(Current - (ULONG_PTR)SecurityDescriptor);
 735         Current += GroupLength;
 736     }
 737
 738     if (DaclLength != 0)
 739     {
 740         RtlCopyMemory((PVOID)Current,
 741                       Dacl,
 742                       DaclLength);
 743         RelSD->Dacl = (ULONG)(Current - (ULONG_PTR)SecurityDescriptor);
 744         Current += DaclLength;
 745     }
 746
 747     if (SaclLength != 0)
 748     {
 749         RtlCopyMemory((PVOID)Current,
 750                       Sacl,
 751                       SaclLength);
 752         RelSD->Sacl = (ULONG)(Current - (ULONG_PTR)SecurityDescriptor);
 753         Current += SaclLength;
 754     }
 755
 756     *Length = SdLength;
 757
 758     return STATUS_SUCCESS;
 759 }
 760
 761 /*
 762  * @implemented
 763  */
 764 NTSTATUS
 765 NTAPI
 766 SeReleaseSecurityDescriptor(IN PSECURITY_DESCRIPTOR CapturedSecurityDescriptor,
 767                             IN KPROCESSOR_MODE CurrentMode,
 768                             IN BOOLEAN CaptureIfKernelMode)
 769 {
 770     PAGED_CODE();
 771
 772     /*
 773      * WARNING! You need to call this function with the same value for CurrentMode
 774      * and CaptureIfKernelMode that you previously passed to
 775      * SeCaptureSecurityDescriptor() in order to avoid memory leaks!
 776      */
 777     if (CapturedSecurityDescriptor != NULL &&
 778         (CurrentMode != KernelMode ||
 779          (CurrentMode == KernelMode && CaptureIfKernelMode)))
 780     {
 781         /* Only delete the descriptor when SeCaptureSecurityDescriptor() allocated one! */
 782         ExFreePoolWithTag(CapturedSecurityDescriptor, TAG_SD);
 783     }
 784
 785     return STATUS_SUCCESS;
 786 }
 787
 788 /*
 789  * @implemented
 790  */
 791 _IRQL_requires_max_(PASSIVE_LEVEL)
 792 NTSTATUS
 793 NTAPI
 794 SeSetSecurityDescriptorInfo(
 795     _In_opt_ PVOID Object,
 796     _In_ PSECURITY_INFORMATION SecurityInformation,
 797     _In_ PSECURITY_DESCRIPTOR SecurityDescriptor,
 798     _Inout_ PSECURITY_DESCRIPTOR *ObjectsSecurityDescriptor,
 799     _In_ POOL_TYPE PoolType,
 800     _In_ PGENERIC_MAPPING GenericMapping)
 801 {
 802     PAGED_CODE();
 803
 804     return SeSetSecurityDescriptorInfoEx(Object,
 805                                          SecurityInformation,
 806                                          SecurityDescriptor,
 807                                          ObjectsSecurityDescriptor,
 808                                          0,
 809                                          PoolType,
 810                                          GenericMapping);
 811 }
 812
 813 /*
 814  * @implemented
 815  */
 816 _IRQL_requires_max_(PASSIVE_LEVEL)
 817 NTSTATUS
 818 NTAPI
 819 SeSetSecurityDescriptorInfoEx(
 820     _In_opt_ PVOID Object,
 821     _In_ PSECURITY_INFORMATION _SecurityInformation,
 822     _In_ PSECURITY_DESCRIPTOR _SecurityDescriptor,
 823     _Inout_ PSECURITY_DESCRIPTOR *ObjectsSecurityDescriptor,
 824     _In_ ULONG AutoInheritFlags,
 825     _In_ POOL_TYPE PoolType,
 826     _In_ PGENERIC_MAPPING GenericMapping)
 827 {
 828     PISECURITY_DESCRIPTOR_RELATIVE ObjectSd;
 829     PISECURITY_DESCRIPTOR_RELATIVE NewSd;
 830     PISECURITY_DESCRIPTOR SecurityDescriptor = _SecurityDescriptor;
 831     PSID Owner;
 832     PSID Group;
 833     PACL Dacl;
 834     PACL Sacl;
 835     ULONG OwnerLength;
 836     ULONG GroupLength;
 837     ULONG DaclLength;
 838     ULONG SaclLength;
 839     SECURITY_DESCRIPTOR_CONTROL Control = 0;
 840     ULONG Current;
 841     SECURITY_INFORMATION SecurityInformation;
 842
 843     PAGED_CODE();
 844
 845     ObjectSd = *ObjectsSecurityDescriptor;
 846
 847     /* The object does not have a security descriptor. */
 848     if (!ObjectSd)
 849         return STATUS_NO_SECURITY_ON_OBJECT;
 850
 851     ASSERT(ObjectSd->Control & SE_SELF_RELATIVE);
 852
 853     SecurityInformation = *_SecurityInformation;
 854
 855     /* Get owner and owner size */
 856     if (SecurityInformation & OWNER_SECURITY_INFORMATION)
 857     {
 858         Owner = SepGetOwnerFromDescriptor(SecurityDescriptor);
 859         Control |= (SecurityDescriptor->Control & SE_OWNER_DEFAULTED);
 860     }
 861     else
 862     {
 863         Owner = SepGetOwnerFromDescriptor(ObjectSd);
 864         Control |= (ObjectSd->Control & SE_OWNER_DEFAULTED);
 865     }
 866     OwnerLength = Owner ? RtlLengthSid(Owner) : 0;
 867     ASSERT(OwnerLength % sizeof(ULONG) == 0);
 868
 869     /* Get group and group size */
 870     if (SecurityInformation & GROUP_SECURITY_INFORMATION)
 871     {
 872         Group = SepGetGroupFromDescriptor(SecurityDescriptor);
 873         Control |= (SecurityDescriptor->Control & SE_GROUP_DEFAULTED);
 874     }
 875     else
 876     {
 877         Group = SepGetGroupFromDescriptor(ObjectSd);
 878         Control |= (ObjectSd->Control & SE_GROUP_DEFAULTED);
 879     }
 880     GroupLength = Group ? RtlLengthSid(Group) : 0;
 881     ASSERT(GroupLength % sizeof(ULONG) == 0);
 882
 883     /* Get DACL and DACL size */
 884     if (SecurityInformation & DACL_SECURITY_INFORMATION)
 885     {
 886         Dacl = SepGetDaclFromDescriptor(SecurityDescriptor);
 887         Control |= (SecurityDescriptor->Control & (SE_DACL_DEFAULTED | SE_DACL_PRESENT));
 888     }
 889     else
 890     {
 891         Dacl = SepGetDaclFromDescriptor(ObjectSd);
 892         Control |= (ObjectSd->Control & (SE_DACL_DEFAULTED | SE_DACL_PRESENT));
 893     }
 894     DaclLength = Dacl ? ROUND_UP((ULONG)Dacl->AclSize, 4) : 0;
 895
 896     /* Get SACL and SACL size */
 897     if (SecurityInformation & SACL_SECURITY_INFORMATION)
 898     {
 899         Sacl = SepGetSaclFromDescriptor(SecurityDescriptor);
 900         Control |= (SecurityDescriptor->Control & (SE_SACL_DEFAULTED | SE_SACL_PRESENT));
 901     }
 902     else
 903     {
 904         Sacl = SepGetSaclFromDescriptor(ObjectSd);
 905         Control |= (ObjectSd->Control & (SE_SACL_DEFAULTED | SE_SACL_PRESENT));
 906     }
 907     SaclLength = Sacl ? ROUND_UP((ULONG)Sacl->AclSize, 4) : 0;
 908
 909     NewSd = ExAllocatePoolWithTag(NonPagedPool,
 910                                   sizeof(SECURITY_DESCRIPTOR_RELATIVE) +
 911                                   OwnerLength + GroupLength +
 912                                   DaclLength + SaclLength,
 913                                   TAG_SD);
 914     if (NewSd == NULL)
 915     {
 916         return STATUS_INSUFFICIENT_RESOURCES;
 917     }
 918
 919     RtlCreateSecurityDescriptor(NewSd,
 920                                 SECURITY_DESCRIPTOR_REVISION1);
 921
 922     /* We always build a self-relative descriptor */
 923     NewSd->Control = Control | SE_SELF_RELATIVE;
 924
 925     Current = sizeof(SECURITY_DESCRIPTOR);
 926
 927     if (OwnerLength != 0)
 928     {
 929         RtlCopyMemory((PUCHAR)NewSd + Current, Owner, OwnerLength);
 930         NewSd->Owner = Current;
 931         Current += OwnerLength;
 932     }
 933
 934     if (GroupLength != 0)
 935     {
 936         RtlCopyMemory((PUCHAR)NewSd + Current, Group, GroupLength);
 937         NewSd->Group = Current;
 938         Current += GroupLength;
 939     }
 940
 941     if (DaclLength != 0)
 942     {
 943         RtlCopyMemory((PUCHAR)NewSd + Current, Dacl, DaclLength);
 944         NewSd->Dacl = Current;
 945         Current += DaclLength;
 946     }
 947
 948     if (SaclLength != 0)
 949     {
 950         RtlCopyMemory((PUCHAR)NewSd + Current, Sacl, SaclLength);
 951         NewSd->Sacl = Current;
 952         Current += SaclLength;
 953     }
 954
 955     *ObjectsSecurityDescriptor = NewSd;
 956     return STATUS_SUCCESS;
 957 }
 958
 959
 960 /*
 961  * @implemented
 962  */
 963 BOOLEAN NTAPI
 964 SeValidSecurityDescriptor(IN ULONG Length,
 965                           IN PSECURITY_DESCRIPTOR _SecurityDescriptor)
 966 {
 967     ULONG SdLength;
 968     PISID Sid;
 969     PACL Acl;
 970     PISECURITY_DESCRIPTOR_RELATIVE SecurityDescriptor = _SecurityDescriptor;
 971
 972     if (Length < SECURITY_DESCRIPTOR_MIN_LENGTH)
 973     {
 974         DPRINT1("Invalid Security Descriptor revision\n");
 975         return FALSE;
 976     }
 977
 978     if (SecurityDescriptor->Revision != SECURITY_DESCRIPTOR_REVISION1)
 979     {
 980         DPRINT1("Invalid Security Descriptor revision\n");
 981         return FALSE;
 982     }
 983
 984     if (!(SecurityDescriptor->Control & SE_SELF_RELATIVE))
 985     {
 986         DPRINT1("No self-relative Security Descriptor\n");
 987         return FALSE;
 988     }
 989
 990     SdLength = sizeof(SECURITY_DESCRIPTOR);
 991
 992     /* Check Owner SID */
 993     if (!SecurityDescriptor->Owner)
 994     {
 995         DPRINT1("No Owner SID\n");
 996         return FALSE;
 997     }
 998
 999     if (SecurityDescriptor->Owner % sizeof(ULONG))
1000     {
1001         DPRINT1("Invalid Owner SID alignment\n");
1002         return FALSE;
1003     }
1004
1005     Sid = (PISID)((ULONG_PTR)SecurityDescriptor + SecurityDescriptor->Owner);
1006     if (Sid->Revision != SID_REVISION)
1007     {
1008         DPRINT1("Invalid Owner SID revision\n");
1009         return FALSE;
1010     }
1011
1012     SdLength += (sizeof(SID) + (Sid->SubAuthorityCount - 1) * sizeof(ULONG));
1013     if (Length < SdLength)
1014     {
1015         DPRINT1("Invalid Owner SID size\n");
1016         return FALSE;
1017     }
1018
1019     /* Check Group SID */
1020     if (SecurityDescriptor->Group)
1021     {
1022         if (SecurityDescriptor->Group % sizeof(ULONG))
1023         {
1024             DPRINT1("Invalid Group SID alignment\n");
1025             return FALSE;
1026         }
1027
1028         Sid = (PSID)((ULONG_PTR)SecurityDescriptor + SecurityDescriptor->Group);
1029         if (Sid->Revision != SID_REVISION)
1030         {
1031             DPRINT1("Invalid Group SID revision\n");
1032             return FALSE;
1033         }
1034
1035         SdLength += (sizeof(SID) + (Sid->SubAuthorityCount - 1) * sizeof(ULONG));
1036         if (Length < SdLength)
1037         {
1038             DPRINT1("Invalid Group SID size\n");
1039             return FALSE;
1040         }
1041     }
1042
1043     /* Check DACL */
1044     if (SecurityDescriptor->Dacl)
1045     {
1046         if (SecurityDescriptor->Dacl % sizeof(ULONG))
1047         {
1048             DPRINT1("Invalid DACL alignment\n");
1049             return FALSE;
1050         }
1051
1052         Acl = (PACL)((ULONG_PTR)SecurityDescriptor + SecurityDescriptor->Dacl);
1053         if ((Acl->AclRevision < MIN_ACL_REVISION) ||
1054             (Acl->AclRevision > MAX_ACL_REVISION))
1055         {
1056             DPRINT1("Invalid DACL revision\n");
1057             return FALSE;
1058         }
1059
1060         SdLength += Acl->AclSize;
1061         if (Length < SdLength)
1062         {
1063             DPRINT1("Invalid DACL size\n");
1064             return FALSE;
1065         }
1066     }
1067
1068     /* Check SACL */
1069     if (SecurityDescriptor->Sacl)
1070     {
1071         if (SecurityDescriptor->Sacl % sizeof(ULONG))
1072         {
1073             DPRINT1("Invalid SACL alignment\n");
1074             return FALSE;
1075         }
1076
1077         Acl = (PACL)((ULONG_PTR)SecurityDescriptor + SecurityDescriptor->Sacl);
1078         if ((Acl->AclRevision < MIN_ACL_REVISION) ||
1079             (Acl->AclRevision > MAX_ACL_REVISION))
1080         {
1081             DPRINT1("Invalid SACL revision\n");
1082             return FALSE;
1083         }
1084
1085         SdLength += Acl->AclSize;
1086         if (Length < SdLength)
1087         {
1088             DPRINT1("Invalid SACL size\n");
1089             return FALSE;
1090         }
1091     }
1092
1093     return TRUE;
1094 }
1095
1096 /*
1097  * @implemented
1098  */
1099 _IRQL_requires_max_(PASSIVE_LEVEL)
1100 NTSTATUS
1101 NTAPI
1102 SeDeassignSecurity(
1103     _Inout_ PSECURITY_DESCRIPTOR *SecurityDescriptor)
1104 {
1105     PAGED_CODE();
1106
1107     if (*SecurityDescriptor != NULL)
1108     {
1109         ExFreePoolWithTag(*SecurityDescriptor, TAG_SD);
1110         *SecurityDescriptor = NULL;
1111     }
1112
1113     return STATUS_SUCCESS;
1114 }
1115
1116 /*
1117  * @implemented
1118  */
1119 _IRQL_requires_max_(PASSIVE_LEVEL)
1120 NTSTATUS
1121 NTAPI
1122 SeAssignSecurityEx(
1123     _In_opt_ PSECURITY_DESCRIPTOR _ParentDescriptor,
1124     _In_opt_ PSECURITY_DESCRIPTOR _ExplicitDescriptor,
1125     _Out_ PSECURITY_DESCRIPTOR *NewDescriptor,
1126     _In_opt_ GUID *ObjectType,
1127     _In_ BOOLEAN IsDirectoryObject,
1128     _In_ ULONG AutoInheritFlags,
1129     _In_ PSECURITY_SUBJECT_CONTEXT SubjectContext,
1130     _In_ PGENERIC_MAPPING GenericMapping,
1131     _In_ POOL_TYPE PoolType)
1132 {
1133     PISECURITY_DESCRIPTOR ParentDescriptor = _ParentDescriptor;
1134     PISECURITY_DESCRIPTOR ExplicitDescriptor = _ExplicitDescriptor;
1135     PISECURITY_DESCRIPTOR_RELATIVE Descriptor;
1136     PTOKEN Token;
1137     ULONG OwnerLength;
1138     ULONG GroupLength;
1139     ULONG DaclLength;
1140     ULONG SaclLength;
1141     ULONG Length;
1142     SECURITY_DESCRIPTOR_CONTROL Control = 0;
1143     ULONG Current;
1144     PSID Owner = NULL;
1145     PSID Group = NULL;
1146     PACL ExplicitAcl;
1147     BOOLEAN ExplicitPresent;
1148     BOOLEAN ExplicitDefaulted;
1149     PACL ParentAcl;
1150     PACL Dacl = NULL;
1151     PACL Sacl = NULL;
1152     BOOLEAN DaclIsInherited;
1153     BOOLEAN SaclIsInherited;
1154     BOOLEAN DaclPresent;
1155     BOOLEAN SaclPresent;
1156     NTSTATUS Status;
1157
1158     DBG_UNREFERENCED_PARAMETER(ObjectType);
1159     DBG_UNREFERENCED_PARAMETER(AutoInheritFlags);
1160     UNREFERENCED_PARAMETER(PoolType);
1161
1162     PAGED_CODE();
1163
1164     *NewDescriptor = NULL;
1165
1166     if (!ARGUMENT_PRESENT(SubjectContext))
1167     {
1168         return STATUS_NO_TOKEN;
1169     }
1170
1171     /* Lock subject context */
1172     SeLockSubjectContext(SubjectContext);
1173
1174     if (SubjectContext->ClientToken != NULL)
1175     {
1176         Token = SubjectContext->ClientToken;
1177     }
1178     else
1179     {
1180         Token = SubjectContext->PrimaryToken;
1181     }
1182
1183     /* Inherit the Owner SID */
1184     if (ExplicitDescriptor != NULL)
1185     {
1186         DPRINT("Use explicit owner sid!\n");
1187         Owner = SepGetOwnerFromDescriptor(ExplicitDescriptor);
1188     }
1189     if (!Owner)
1190     {
1191         if (AutoInheritFlags & 0x20 /* FIXME: SEF_DEFAULT_OWNER_FROM_PARENT */)
1192         {
1193             DPRINT("Use parent owner sid!\n");
1194             if (!ARGUMENT_PRESENT(ParentDescriptor))
1195             {
1196                 SeUnlockSubjectContext(SubjectContext);
1197                 return STATUS_INVALID_OWNER;
1198             }
1199
1200             Owner = SepGetOwnerFromDescriptor(ParentDescriptor);
1201             if (!Owner)
1202             {
1203                 SeUnlockSubjectContext(SubjectContext);
1204                 return STATUS_INVALID_OWNER;
1205             }
1206         }
1207         else
1208         {
1209             DPRINT("Use token owner sid!\n");
1210             Owner = Token->UserAndGroups[Token->DefaultOwnerIndex].Sid;
1211         }
1212     }
1213     OwnerLength = RtlLengthSid(Owner);
1214     ASSERT(OwnerLength % sizeof(ULONG) == 0);
1215
1216     /* Inherit the Group SID */
1217     if (ExplicitDescriptor != NULL)
1218     {
1219         Group = SepGetGroupFromDescriptor(ExplicitDescriptor);
1220     }
1221     if (!Group)
1222     {
1223         if (AutoInheritFlags & 0x40 /* FIXME: SEF_DEFAULT_GROUP_FROM_PARENT */)
1224         {
1225             DPRINT("Use parent group sid!\n");
1226             if (!ARGUMENT_PRESENT(ParentDescriptor))
1227             {
1228                 SeUnlockSubjectContext(SubjectContext);
1229                 return STATUS_INVALID_PRIMARY_GROUP;
1230             }
1231
1232             Group = SepGetGroupFromDescriptor(ParentDescriptor);
1233             if (!Group)
1234             {
1235                 SeUnlockSubjectContext(SubjectContext);
1236                 return STATUS_INVALID_PRIMARY_GROUP;
1237             }
1238         }
1239         else
1240         {
1241             DPRINT("Use token group sid!\n");
1242             Group = Token->PrimaryGroup;
1243         }
1244     }
1245     if (!Group)
1246     {
1247         SeUnlockSubjectContext(SubjectContext);
1248         return STATUS_INVALID_PRIMARY_GROUP;
1249     }
1250     GroupLength = RtlLengthSid(Group);
1251     ASSERT(GroupLength % sizeof(ULONG) == 0);
1252
1253     /* Inherit the DACL */
1254     DaclLength = 0;
1255     ExplicitAcl = NULL;
1256     ExplicitPresent = FALSE;
1257     ExplicitDefaulted = FALSE;
1258     if (ExplicitDescriptor != NULL &&
1259         (ExplicitDescriptor->Control & SE_DACL_PRESENT))
1260     {
1261         ExplicitAcl = SepGetDaclFromDescriptor(ExplicitDescriptor);
1262         ExplicitPresent = TRUE;
1263         if (ExplicitDescriptor->Control & SE_DACL_DEFAULTED)
1264             ExplicitDefaulted = TRUE;
1265     }
1266     ParentAcl = NULL;
1267     if (ParentDescriptor != NULL &&
1268         (ParentDescriptor->Control & SE_DACL_PRESENT))
1269     {
1270         ParentAcl = SepGetDaclFromDescriptor(ParentDescriptor);
1271     }
1272     Dacl = SepSelectAcl(ExplicitAcl,
1273                         ExplicitPresent,
1274                         ExplicitDefaulted,
1275                         ParentAcl,
1276                         Token->DefaultDacl,
1277                         &DaclLength,
1278                         Owner,
1279                         Group,
1280                         &DaclPresent,
1281                         &DaclIsInherited,
1282                         IsDirectoryObject,
1283                         GenericMapping);
1284     if (DaclPresent)
1285         Control |= SE_DACL_PRESENT;
1286     ASSERT(DaclLength % sizeof(ULONG) == 0);
1287
1288     /* Inherit the SACL */
1289     SaclLength = 0;
1290     ExplicitAcl = NULL;
1291     ExplicitPresent = FALSE;
1292     ExplicitDefaulted = FALSE;
1293     if (ExplicitDescriptor != NULL &&
1294         (ExplicitDescriptor->Control & SE_SACL_PRESENT))
1295     {
1296         ExplicitAcl = SepGetSaclFromDescriptor(ExplicitDescriptor);
1297         ExplicitPresent = TRUE;
1298         if (ExplicitDescriptor->Control & SE_SACL_DEFAULTED)
1299             ExplicitDefaulted = TRUE;
1300     }
1301     ParentAcl = NULL;
1302     if (ParentDescriptor != NULL &&
1303         (ParentDescriptor->Control & SE_SACL_PRESENT))
1304     {
1305         ParentAcl = SepGetSaclFromDescriptor(ParentDescriptor);
1306     }
1307     Sacl = SepSelectAcl(ExplicitAcl,
1308                         ExplicitPresent,
1309                         ExplicitDefaulted,
1310                         ParentAcl,
1311                         NULL,
1312                         &SaclLength,
1313                         Owner,
1314                         Group,
1315                         &SaclPresent,
1316                         &SaclIsInherited,
1317                         IsDirectoryObject,
1318                         GenericMapping);
1319     if (SaclPresent)
1320         Control |= SE_SACL_PRESENT;
1321     ASSERT(SaclLength % sizeof(ULONG) == 0);
1322
1323     /* Allocate and initialize the new security descriptor */
1324     Length = sizeof(SECURITY_DESCRIPTOR_RELATIVE) +
1325         OwnerLength + GroupLength + DaclLength + SaclLength;
1326
1327     DPRINT("L: sizeof(SECURITY_DESCRIPTOR) %u OwnerLength %lu GroupLength %lu DaclLength %lu SaclLength %lu\n",
1328            sizeof(SECURITY_DESCRIPTOR),
1329            OwnerLength,
1330            GroupLength,
1331            DaclLength,
1332            SaclLength);
1333
1334     Descriptor = ExAllocatePoolWithTag(PagedPool, Length, TAG_SD);
1335     if (Descriptor == NULL)
1336     {
1337         DPRINT1("ExAlloctePool() failed\n");
1338         SeUnlockSubjectContext(SubjectContext);
1339         return STATUS_INSUFFICIENT_RESOURCES;
1340     }
1341
1342     RtlZeroMemory(Descriptor, Length);
1343     RtlCreateSecurityDescriptor(Descriptor, SECURITY_DESCRIPTOR_REVISION);
1344
1345     Descriptor->Control = Control | SE_SELF_RELATIVE;
1346
1347     Current = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
1348
1349     if (SaclLength != 0)
1350     {
1351         Status = SepPropagateAcl((PACL)((PUCHAR)Descriptor + Current),
1352                                  &SaclLength,
1353                                  Sacl,
1354                                  Owner,
1355                                  Group,
1356                                  SaclIsInherited,
1357                                  IsDirectoryObject,
1358                                  GenericMapping);
1359         ASSERT(Status == STATUS_SUCCESS);
1360         Descriptor->Sacl = Current;
1361         Current += SaclLength;
1362     }
1363
1364     if (DaclLength != 0)
1365     {
1366         Status = SepPropagateAcl((PACL)((PUCHAR)Descriptor + Current),
1367                                  &DaclLength,
1368                                  Dacl,
1369                                  Owner,
1370                                  Group,
1371                                  DaclIsInherited,
1372                                  IsDirectoryObject,
1373                                  GenericMapping);
1374         ASSERT(Status == STATUS_SUCCESS);
1375         Descriptor->Dacl = Current;
1376         Current += DaclLength;
1377     }
1378
1379     if (OwnerLength != 0)
1380     {
1381         RtlCopyMemory((PUCHAR)Descriptor + Current, Owner, OwnerLength);
1382         Descriptor->Owner = Current;
1383         Current += OwnerLength;
1384         DPRINT("Owner of %p at %x\n", Descriptor, Descriptor->Owner);
1385     }
1386     else
1387     {
1388         DPRINT("Owner of %p is zero length\n", Descriptor);
1389     }
1390
1391     if (GroupLength != 0)
1392     {
1393         RtlCopyMemory((PUCHAR)Descriptor + Current, Group, GroupLength);
1394         Descriptor->Group = Current;
1395     }
1396
1397     /* Unlock subject context */
1398     SeUnlockSubjectContext(SubjectContext);
1399
1400     *NewDescriptor = Descriptor;
1401
1402     DPRINT("Descriptor %p\n", Descriptor);
1403     ASSERT(RtlLengthSecurityDescriptor(Descriptor));
1404
1405     return STATUS_SUCCESS;
1406 }
1407
1408 /*
1409  * @implemented
1410  */
1411 _IRQL_requires_max_(PASSIVE_LEVEL)
1412 NTSTATUS
1413 NTAPI
1414 SeAssignSecurity(
1415     _In_opt_ PSECURITY_DESCRIPTOR ParentDescriptor,
1416     _In_opt_ PSECURITY_DESCRIPTOR ExplicitDescriptor,
1417     _Out_ PSECURITY_DESCRIPTOR *NewDescriptor,
1418     _In_ BOOLEAN IsDirectoryObject,
1419     _In_ PSECURITY_SUBJECT_CONTEXT SubjectContext,
1420     _In_ PGENERIC_MAPPING GenericMapping,
1421     _In_ POOL_TYPE PoolType)
1422 {
1423     PAGED_CODE();
1424
1425     return SeAssignSecurityEx(ParentDescriptor,
1426                               ExplicitDescriptor,
1427                               NewDescriptor,
1428                               NULL,
1429                               IsDirectoryObject,
1430                               0,
1431                               SubjectContext,
1432                               GenericMapping,
1433                               PoolType);
1434 }
1435
1436 /* EOF */