2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: ntoskrnl/se/semgr.c
5 * PURPOSE: Security manager
7 * PROGRAMMERS: No programmer listed.
10 /* INCLUDES *******************************************************************/
16 /* GLOBALS ********************************************************************/
18 PSE_EXPORTS SeExports
= NULL
;
19 SE_EXPORTS SepExports
;
21 extern ULONG ExpInitializationPhase
;
22 extern ERESOURCE SepSubjectContextLock
;
24 /* PRIVATE FUNCTIONS **********************************************************/
26 static BOOLEAN INIT_FUNCTION
29 SepExports
.SeCreateTokenPrivilege
= SeCreateTokenPrivilege
;
30 SepExports
.SeAssignPrimaryTokenPrivilege
= SeAssignPrimaryTokenPrivilege
;
31 SepExports
.SeLockMemoryPrivilege
= SeLockMemoryPrivilege
;
32 SepExports
.SeIncreaseQuotaPrivilege
= SeIncreaseQuotaPrivilege
;
33 SepExports
.SeUnsolicitedInputPrivilege
= SeUnsolicitedInputPrivilege
;
34 SepExports
.SeTcbPrivilege
= SeTcbPrivilege
;
35 SepExports
.SeSecurityPrivilege
= SeSecurityPrivilege
;
36 SepExports
.SeTakeOwnershipPrivilege
= SeTakeOwnershipPrivilege
;
37 SepExports
.SeLoadDriverPrivilege
= SeLoadDriverPrivilege
;
38 SepExports
.SeCreatePagefilePrivilege
= SeCreatePagefilePrivilege
;
39 SepExports
.SeIncreaseBasePriorityPrivilege
= SeIncreaseBasePriorityPrivilege
;
40 SepExports
.SeSystemProfilePrivilege
= SeSystemProfilePrivilege
;
41 SepExports
.SeSystemtimePrivilege
= SeSystemtimePrivilege
;
42 SepExports
.SeProfileSingleProcessPrivilege
= SeProfileSingleProcessPrivilege
;
43 SepExports
.SeCreatePermanentPrivilege
= SeCreatePermanentPrivilege
;
44 SepExports
.SeBackupPrivilege
= SeBackupPrivilege
;
45 SepExports
.SeRestorePrivilege
= SeRestorePrivilege
;
46 SepExports
.SeShutdownPrivilege
= SeShutdownPrivilege
;
47 SepExports
.SeDebugPrivilege
= SeDebugPrivilege
;
48 SepExports
.SeAuditPrivilege
= SeAuditPrivilege
;
49 SepExports
.SeSystemEnvironmentPrivilege
= SeSystemEnvironmentPrivilege
;
50 SepExports
.SeChangeNotifyPrivilege
= SeChangeNotifyPrivilege
;
51 SepExports
.SeRemoteShutdownPrivilege
= SeRemoteShutdownPrivilege
;
53 SepExports
.SeNullSid
= SeNullSid
;
54 SepExports
.SeWorldSid
= SeWorldSid
;
55 SepExports
.SeLocalSid
= SeLocalSid
;
56 SepExports
.SeCreatorOwnerSid
= SeCreatorOwnerSid
;
57 SepExports
.SeCreatorGroupSid
= SeCreatorGroupSid
;
58 SepExports
.SeNtAuthoritySid
= SeNtAuthoritySid
;
59 SepExports
.SeDialupSid
= SeDialupSid
;
60 SepExports
.SeNetworkSid
= SeNetworkSid
;
61 SepExports
.SeBatchSid
= SeBatchSid
;
62 SepExports
.SeInteractiveSid
= SeInteractiveSid
;
63 SepExports
.SeLocalSystemSid
= SeLocalSystemSid
;
64 SepExports
.SeAliasAdminsSid
= SeAliasAdminsSid
;
65 SepExports
.SeAliasUsersSid
= SeAliasUsersSid
;
66 SepExports
.SeAliasGuestsSid
= SeAliasGuestsSid
;
67 SepExports
.SeAliasPowerUsersSid
= SeAliasPowerUsersSid
;
68 SepExports
.SeAliasAccountOpsSid
= SeAliasAccountOpsSid
;
69 SepExports
.SeAliasSystemOpsSid
= SeAliasSystemOpsSid
;
70 SepExports
.SeAliasPrintOpsSid
= SeAliasPrintOpsSid
;
71 SepExports
.SeAliasBackupOpsSid
= SeAliasBackupOpsSid
;
72 SepExports
.SeAuthenticatedUsersSid
= SeAuthenticatedUsersSid
;
73 SepExports
.SeRestrictedSid
= SeRestrictedSid
;
74 SepExports
.SeAnonymousLogonSid
= SeAnonymousLogonSid
;
76 SepExports
.SeUndockPrivilege
= SeUndockPrivilege
;
77 SepExports
.SeSyncAgentPrivilege
= SeSyncAgentPrivilege
;
78 SepExports
.SeEnableDelegationPrivilege
= SeEnableDelegationPrivilege
;
80 SeExports
= &SepExports
;
87 SepInitializationPhase0(VOID
)
92 if (!SepInitSecurityIDs()) return FALSE
;
93 if (!SepInitDACLs()) return FALSE
;
94 if (!SepInitSDs()) return FALSE
;
96 if (!SepInitExports()) return FALSE
;
98 /* Initialize the subject context lock */
99 ExInitializeResource(&SepSubjectContextLock
);
101 /* Initialize token objects */
102 SepInitializeTokenImplementation();
104 /* Clear impersonation info for the idle thread */
105 PsGetCurrentThread()->ImpersonationInfo
= NULL
;
106 PspClearCrossThreadFlag(PsGetCurrentThread(),
107 CT_ACTIVE_IMPERSONATION_INFO_BIT
);
109 /* Initialize the boot token */
110 ObInitializeFastReference(&PsGetCurrentProcess()->Token
, NULL
);
111 ObInitializeFastReference(&PsGetCurrentProcess()->Token
,
112 SepCreateSystemProcessToken());
118 SepInitializationPhase1(VOID
)
123 /* Insert the system token into the tree */
124 Status
= ObInsertObject((PVOID
)(PsGetCurrentProcess()->Token
.Value
&
131 ASSERT(NT_SUCCESS(Status
));
133 /* FIXME: TODO \\ Security directory */
141 /* Check the initialization phase */
142 switch (ExpInitializationPhase
)
147 return SepInitializationPhase0();
152 return SepInitializationPhase1();
156 /* Don't know any other phase! Bugcheck! */
157 KeBugCheckEx(UNEXPECTED_INITIALIZATION_CALL
,
159 ExpInitializationPhase
,
170 OBJECT_ATTRIBUTES ObjectAttributes
;
172 HANDLE DirectoryHandle
;
176 /* Create '\Security' directory */
177 RtlInitUnicodeString(&Name
,
179 InitializeObjectAttributes(&ObjectAttributes
,
184 Status
= ZwCreateDirectoryObject(&DirectoryHandle
,
185 DIRECTORY_ALL_ACCESS
,
187 if (!NT_SUCCESS(Status
))
189 DPRINT1("Failed to create 'Security' directory!\n");
193 /* Create 'LSA_AUTHENTICATION_INITALIZED' event */
194 RtlInitUnicodeString(&Name
,
195 L
"\\LSA_AUTHENTICATION_INITALIZED");
196 InitializeObjectAttributes(&ObjectAttributes
,
201 Status
= ZwCreateEvent(&EventHandle
,
204 SynchronizationEvent
,
206 if (!NT_SUCCESS(Status
))
208 DPRINT1("Failed to create 'LSA_AUTHENTICATION_INITALIZED' event!\n");
209 NtClose(DirectoryHandle
);
213 ZwClose(EventHandle
);
214 ZwClose(DirectoryHandle
);
216 /* FIXME: Create SRM port and listener thread */
223 SeDefaultObjectMethod(IN PVOID Object
,
224 IN SECURITY_OPERATION_CODE OperationType
,
225 IN PSECURITY_INFORMATION SecurityInformation
,
226 IN OUT PSECURITY_DESCRIPTOR SecurityDescriptor
,
227 IN OUT PULONG ReturnLength OPTIONAL
,
228 IN OUT PSECURITY_DESCRIPTOR
*OldSecurityDescriptor
,
229 IN POOL_TYPE PoolType
,
230 IN PGENERIC_MAPPING GenericMapping
)
234 /* Select the operation type */
235 switch (OperationType
)
237 /* Setting a new descriptor */
238 case SetSecurityDescriptor
:
241 ASSERT((PoolType
== PagedPool
) || (PoolType
== NonPagedPool
));
243 /* Set the information */
244 return ObSetSecurityDescriptorInfo(Object
,
247 OldSecurityDescriptor
,
251 case QuerySecurityDescriptor
:
253 /* Query the information */
254 return ObQuerySecurityDescriptorInfo(Object
,
258 OldSecurityDescriptor
);
260 case DeleteSecurityDescriptor
:
263 return ObDeassignSecurity(OldSecurityDescriptor
);
265 case AssignSecurityDescriptor
:
268 ObAssignObjectSecurityDescriptor(Object
, SecurityDescriptor
, PoolType
);
269 return STATUS_SUCCESS
;
274 KeBugCheckEx(SECURITY_SYSTEM
, 0, STATUS_INVALID_PARAMETER
, 0, 0);
277 /* Should never reach here */
279 return STATUS_SUCCESS
;
282 ULONG SidInTokenCalls
= 0;
285 SepSidInToken(PACCESS_TOKEN _Token
,
289 PTOKEN Token
= (PTOKEN
)_Token
;
294 if (!(SidInTokenCalls
% 10000)) DPRINT1("SidInToken Calls: %d\n", SidInTokenCalls
);
296 if (Token
->UserAndGroupCount
== 0)
301 for (i
=0; i
<Token
->UserAndGroupCount
; i
++)
303 if (RtlEqualSid(Sid
, Token
->UserAndGroups
[i
].Sid
))
305 if ((i
== 0)|| (Token
->UserAndGroups
[i
].Attributes
& SE_GROUP_ENABLED
))
318 SepTokenIsOwner(PACCESS_TOKEN Token
,
319 PSECURITY_DESCRIPTOR SecurityDescriptor
)
325 Status
= RtlGetOwnerSecurityDescriptor(SecurityDescriptor
,
328 if (!NT_SUCCESS(Status
))
330 DPRINT1("RtlGetOwnerSecurityDescriptor() failed (Status %lx)\n", Status
);
336 DPRINT1("Owner Sid is NULL\n");
340 return SepSidInToken(Token
, Sid
);
344 SeQuerySecurityAccessMask(IN SECURITY_INFORMATION SecurityInformation
,
345 OUT PACCESS_MASK DesiredAccess
)
349 if (SecurityInformation
& (OWNER_SECURITY_INFORMATION
|
350 GROUP_SECURITY_INFORMATION
| DACL_SECURITY_INFORMATION
))
352 *DesiredAccess
|= READ_CONTROL
;
354 if (SecurityInformation
& SACL_SECURITY_INFORMATION
)
356 *DesiredAccess
|= ACCESS_SYSTEM_SECURITY
;
361 SeSetSecurityAccessMask(IN SECURITY_INFORMATION SecurityInformation
,
362 OUT PACCESS_MASK DesiredAccess
)
366 if (SecurityInformation
& (OWNER_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
))
368 *DesiredAccess
|= WRITE_OWNER
;
370 if (SecurityInformation
& DACL_SECURITY_INFORMATION
)
372 *DesiredAccess
|= WRITE_DAC
;
374 if (SecurityInformation
& SACL_SECURITY_INFORMATION
)
376 *DesiredAccess
|= ACCESS_SYSTEM_SECURITY
;
381 SepAccessCheck(IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
382 IN PSECURITY_SUBJECT_CONTEXT SubjectSecurityContext
,
383 IN ACCESS_MASK DesiredAccess
,
384 IN ACCESS_MASK PreviouslyGrantedAccess
,
385 OUT PPRIVILEGE_SET
* Privileges
,
386 IN PGENERIC_MAPPING GenericMapping
,
387 IN KPROCESSOR_MODE AccessMode
,
388 OUT PACCESS_MASK GrantedAccess
,
389 OUT PNTSTATUS AccessStatus
)
391 LUID_AND_ATTRIBUTES Privilege
;
392 ACCESS_MASK CurrentAccess
, AccessMask
;
393 ACCESS_MASK RemainingAccess
;
394 ACCESS_MASK TempAccess
;
395 ACCESS_MASK TempGrantedAccess
= 0;
396 ACCESS_MASK TempDeniedAccess
= 0;
407 /* Check for no access desired */
410 /* Check if we had no previous access */
411 if (!PreviouslyGrantedAccess
)
413 /* Then there's nothing to give */
414 *AccessStatus
= STATUS_ACCESS_DENIED
;
418 /* Return the previous access only */
419 *GrantedAccess
= PreviouslyGrantedAccess
;
420 *AccessStatus
= STATUS_SUCCESS
;
425 /* Map given accesses */
426 RtlMapGenericMask(&DesiredAccess
, GenericMapping
);
427 if (PreviouslyGrantedAccess
)
428 RtlMapGenericMask(&PreviouslyGrantedAccess
, GenericMapping
);
431 CurrentAccess
= PreviouslyGrantedAccess
;
432 RemainingAccess
= DesiredAccess
;
435 Token
= SubjectSecurityContext
->ClientToken
?
436 SubjectSecurityContext
->ClientToken
: SubjectSecurityContext
->PrimaryToken
;
438 /* Check for system security access */
439 if (RemainingAccess
& ACCESS_SYSTEM_SECURITY
)
441 Privilege
.Luid
= SeSecurityPrivilege
;
442 Privilege
.Attributes
= SE_PRIVILEGE_ENABLED
;
444 /* Fail if we do not the SeSecurityPrivilege */
445 if (!SepPrivilegeCheck(Token
,
448 PRIVILEGE_SET_ALL_NECESSARY
,
451 *AccessStatus
= STATUS_PRIVILEGE_NOT_HELD
;
455 /* Adjust access rights */
456 RemainingAccess
&= ~ACCESS_SYSTEM_SECURITY
;
457 PreviouslyGrantedAccess
|= ACCESS_SYSTEM_SECURITY
;
459 /* Succeed if there are no more rights to grant */
460 if (RemainingAccess
== 0)
462 *GrantedAccess
= PreviouslyGrantedAccess
;
463 *AccessStatus
= STATUS_SUCCESS
;
469 Status
= RtlGetDaclSecurityDescriptor(SecurityDescriptor
,
473 if (!NT_SUCCESS(Status
))
475 *AccessStatus
= Status
;
479 /* RULE 1: Grant desired access if the object is unprotected */
480 if (Present
== FALSE
|| Dacl
== NULL
)
482 if (DesiredAccess
& MAXIMUM_ALLOWED
)
484 *GrantedAccess
= GenericMapping
->GenericAll
;
485 *GrantedAccess
|= (DesiredAccess
& ~MAXIMUM_ALLOWED
);
489 *GrantedAccess
= DesiredAccess
| PreviouslyGrantedAccess
;
492 *AccessStatus
= STATUS_SUCCESS
;
496 CurrentAccess
= PreviouslyGrantedAccess
;
498 /* RULE 2: Check token for 'take ownership' privilege */
499 if (DesiredAccess
& WRITE_OWNER
)
501 Privilege
.Luid
= SeTakeOwnershipPrivilege
;
502 Privilege
.Attributes
= SE_PRIVILEGE_ENABLED
;
504 if (SepPrivilegeCheck(Token
,
507 PRIVILEGE_SET_ALL_NECESSARY
,
510 /* Adjust access rights */
511 RemainingAccess
&= ~WRITE_OWNER
;
512 PreviouslyGrantedAccess
|= WRITE_OWNER
;
513 CurrentAccess
|= WRITE_OWNER
;
515 /* Succeed if there are no more rights to grant */
516 if (RemainingAccess
== 0)
518 *GrantedAccess
= PreviouslyGrantedAccess
;
519 *AccessStatus
= STATUS_SUCCESS
;
525 /* Deny access if the DACL is empty */
526 if (Dacl
->AceCount
== 0)
528 if (RemainingAccess
== MAXIMUM_ALLOWED
&& PreviouslyGrantedAccess
!= 0)
530 *GrantedAccess
= PreviouslyGrantedAccess
;
531 *AccessStatus
= STATUS_SUCCESS
;
537 *AccessStatus
= STATUS_ACCESS_DENIED
;
542 /* Fail if DACL is absent */
543 if (Present
== FALSE
)
546 *AccessStatus
= STATUS_ACCESS_DENIED
;
550 /* Determine the MAXIMUM_ALLOWED access rights */
551 if (DesiredAccess
& MAXIMUM_ALLOWED
)
553 CurrentAce
= (PACE
)(Dacl
+ 1);
554 for (i
= 0; i
< Dacl
->AceCount
; i
++)
556 Sid
= (PSID
)(CurrentAce
+ 1);
557 if (CurrentAce
->Header
.AceType
== ACCESS_DENIED_ACE_TYPE
)
559 if (SepSidInToken(Token
, Sid
))
561 /* Map access rights from the ACE */
562 TempAccess
= CurrentAce
->AccessMask
;
563 RtlMapGenericMask(&TempAccess
, GenericMapping
);
565 /* Deny access rights that have not been granted yet */
566 TempDeniedAccess
|= (TempAccess
& ~TempGrantedAccess
);
569 else if (CurrentAce
->Header
.AceType
== ACCESS_ALLOWED_ACE_TYPE
)
571 if (SepSidInToken(Token
, Sid
))
573 /* Map access rights from the ACE */
574 TempAccess
= CurrentAce
->AccessMask
;
575 RtlMapGenericMask(&TempAccess
, GenericMapping
);
577 /* Grant access rights that have not been denied yet */
578 TempGrantedAccess
|= (TempAccess
& ~TempDeniedAccess
);
583 DPRINT1("Unsupported ACE type 0x%lx\n", CurrentAce
->Header
.AceType
);
586 /* Get to the next ACE */
587 CurrentAce
= (PACE
)((ULONG_PTR
)CurrentAce
+ CurrentAce
->Header
.AceSize
);
590 /* Fail if some rights have not been granted */
591 RemainingAccess
&= ~(MAXIMUM_ALLOWED
| TempGrantedAccess
);
592 if (RemainingAccess
!= 0)
595 *AccessStatus
= STATUS_ACCESS_DENIED
;
599 /* Set granted access right and access status */
600 *GrantedAccess
= TempGrantedAccess
| PreviouslyGrantedAccess
;
601 if (*GrantedAccess
!= 0)
603 *AccessStatus
= STATUS_SUCCESS
;
608 *AccessStatus
= STATUS_ACCESS_DENIED
;
613 /* RULE 4: Grant rights according to the DACL */
614 CurrentAce
= (PACE
)(Dacl
+ 1);
615 for (i
= 0; i
< Dacl
->AceCount
; i
++)
617 Sid
= (PSID
)(CurrentAce
+ 1);
618 if (CurrentAce
->Header
.AceType
== ACCESS_DENIED_ACE_TYPE
)
620 if (SepSidInToken(Token
, Sid
))
623 *AccessStatus
= STATUS_ACCESS_DENIED
;
628 else if (CurrentAce
->Header
.AceType
== ACCESS_ALLOWED_ACE_TYPE
)
630 if (SepSidInToken(Token
, Sid
))
632 AccessMask
= CurrentAce
->AccessMask
;
633 RtlMapGenericMask(&AccessMask
, GenericMapping
);
634 CurrentAccess
|= AccessMask
;
639 DPRINT1("Unsupported ACE type 0x%lx\n", CurrentAce
->Header
.AceType
);
641 CurrentAce
= (PACE
)((ULONG_PTR
)CurrentAce
+ CurrentAce
->Header
.AceSize
);
644 DPRINT("CurrentAccess %08lx\n DesiredAccess %08lx\n",
645 CurrentAccess
, DesiredAccess
);
647 *GrantedAccess
= CurrentAccess
& DesiredAccess
;
649 if ((*GrantedAccess
& ~VALID_INHERIT_FLAGS
) ==
650 (DesiredAccess
& ~VALID_INHERIT_FLAGS
))
652 *AccessStatus
= STATUS_SUCCESS
;
657 DPRINT1("HACK: Should deny access for caller: granted 0x%lx, desired 0x%lx (generic mapping %p).\n",
658 *GrantedAccess
, DesiredAccess
, GenericMapping
);
659 //*AccessStatus = STATUS_ACCESS_DENIED;
661 *AccessStatus
= STATUS_SUCCESS
;
667 SepGetSDOwner(IN PSECURITY_DESCRIPTOR _SecurityDescriptor
)
669 PISECURITY_DESCRIPTOR SecurityDescriptor
= _SecurityDescriptor
;
672 if (SecurityDescriptor
->Control
& SE_SELF_RELATIVE
)
673 Owner
= (PSID
)((ULONG_PTR
)SecurityDescriptor
->Owner
+
674 (ULONG_PTR
)SecurityDescriptor
);
676 Owner
= (PSID
)SecurityDescriptor
->Owner
;
682 SepGetSDGroup(IN PSECURITY_DESCRIPTOR _SecurityDescriptor
)
684 PISECURITY_DESCRIPTOR SecurityDescriptor
= _SecurityDescriptor
;
687 if (SecurityDescriptor
->Control
& SE_SELF_RELATIVE
)
688 Group
= (PSID
)((ULONG_PTR
)SecurityDescriptor
->Group
+
689 (ULONG_PTR
)SecurityDescriptor
);
691 Group
= (PSID
)SecurityDescriptor
->Group
;
697 /* PUBLIC FUNCTIONS ***********************************************************/
703 SeAccessCheck(IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
704 IN PSECURITY_SUBJECT_CONTEXT SubjectSecurityContext
,
705 IN BOOLEAN SubjectContextLocked
,
706 IN ACCESS_MASK DesiredAccess
,
707 IN ACCESS_MASK PreviouslyGrantedAccess
,
708 OUT PPRIVILEGE_SET
* Privileges
,
709 IN PGENERIC_MAPPING GenericMapping
,
710 IN KPROCESSOR_MODE AccessMode
,
711 OUT PACCESS_MASK GrantedAccess
,
712 OUT PNTSTATUS AccessStatus
)
718 /* Check if this is kernel mode */
719 if (AccessMode
== KernelMode
)
721 /* Check if kernel wants everything */
722 if (DesiredAccess
& MAXIMUM_ALLOWED
)
725 *GrantedAccess
= GenericMapping
->GenericAll
;
726 *GrantedAccess
|= (DesiredAccess
&~ MAXIMUM_ALLOWED
);
727 *GrantedAccess
|= PreviouslyGrantedAccess
;
731 /* Give the desired and previous access */
732 *GrantedAccess
= DesiredAccess
| PreviouslyGrantedAccess
;
736 *AccessStatus
= STATUS_SUCCESS
;
740 /* Check if we didn't get an SD */
741 if (!SecurityDescriptor
)
743 /* Automatic failure */
744 *AccessStatus
= STATUS_ACCESS_DENIED
;
748 /* Check for invalid impersonation */
749 if ((SubjectSecurityContext
->ClientToken
) &&
750 (SubjectSecurityContext
->ImpersonationLevel
< SecurityImpersonation
))
752 *AccessStatus
= STATUS_BAD_IMPERSONATION_LEVEL
;
756 /* Acquire the lock if needed */
757 if (!SubjectContextLocked
)
758 SeLockSubjectContext(SubjectSecurityContext
);
760 /* Check if the token is the owner and grant WRITE_DAC and READ_CONTROL rights */
761 if (DesiredAccess
& (WRITE_DAC
| READ_CONTROL
| MAXIMUM_ALLOWED
))
763 PACCESS_TOKEN Token
= SubjectSecurityContext
->ClientToken
?
764 SubjectSecurityContext
->ClientToken
: SubjectSecurityContext
->PrimaryToken
;
766 if (SepTokenIsOwner(Token
,
769 if (DesiredAccess
& MAXIMUM_ALLOWED
)
770 PreviouslyGrantedAccess
|= (WRITE_DAC
| READ_CONTROL
);
772 PreviouslyGrantedAccess
|= (DesiredAccess
& (WRITE_DAC
| READ_CONTROL
));
774 DesiredAccess
&= ~(WRITE_DAC
| READ_CONTROL
);
778 if (DesiredAccess
== 0)
780 *GrantedAccess
= PreviouslyGrantedAccess
;
781 *AccessStatus
= STATUS_SUCCESS
;
786 /* Call the internal function */
787 ret
= SepAccessCheck(SecurityDescriptor
,
788 SubjectSecurityContext
,
790 PreviouslyGrantedAccess
,
798 /* Release the lock if needed */
799 if (!SubjectContextLocked
)
800 SeUnlockSubjectContext(SubjectSecurityContext
);
805 /* SYSTEM CALLS ***************************************************************/
812 NtAccessCheck(IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
813 IN HANDLE TokenHandle
,
814 IN ACCESS_MASK DesiredAccess
,
815 IN PGENERIC_MAPPING GenericMapping
,
816 OUT PPRIVILEGE_SET PrivilegeSet OPTIONAL
,
817 IN OUT PULONG PrivilegeSetLength
,
818 OUT PACCESS_MASK GrantedAccess
,
819 OUT PNTSTATUS AccessStatus
)
821 PSECURITY_DESCRIPTOR CapturedSecurityDescriptor
= NULL
;
822 SECURITY_SUBJECT_CONTEXT SubjectSecurityContext
;
823 KPROCESSOR_MODE PreviousMode
= ExGetPreviousMode();
824 ACCESS_MASK PreviouslyGrantedAccess
= 0;
829 /* Check if this is kernel mode */
830 if (PreviousMode
== KernelMode
)
832 /* Check if kernel wants everything */
833 if (DesiredAccess
& MAXIMUM_ALLOWED
)
836 *GrantedAccess
= GenericMapping
->GenericAll
;
837 *GrantedAccess
|= (DesiredAccess
&~ MAXIMUM_ALLOWED
);
841 /* Just give the desired access */
842 *GrantedAccess
= DesiredAccess
;
846 *AccessStatus
= STATUS_SUCCESS
;
847 return STATUS_SUCCESS
;
850 /* Protect probe in SEH */
853 /* Probe all pointers */
854 ProbeForRead(GenericMapping
, sizeof(GENERIC_MAPPING
), sizeof(ULONG
));
855 ProbeForRead(PrivilegeSetLength
, sizeof(ULONG
), sizeof(ULONG
));
856 ProbeForWrite(PrivilegeSet
, *PrivilegeSetLength
, sizeof(ULONG
));
857 ProbeForWrite(GrantedAccess
, sizeof(ACCESS_MASK
), sizeof(ULONG
));
858 ProbeForWrite(AccessStatus
, sizeof(NTSTATUS
), sizeof(ULONG
));
860 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
862 /* Return the exception code */
863 _SEH2_YIELD(return _SEH2_GetExceptionCode());
867 /* Check for unmapped access rights */
868 if (DesiredAccess
& (GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
))
869 return STATUS_GENERIC_NOT_MAPPED
;
871 /* Reference the token */
872 Status
= ObReferenceObjectByHandle(TokenHandle
,
878 if (!NT_SUCCESS(Status
))
880 DPRINT("Failed to reference token (Status %lx)\n", Status
);
884 /* Check token type */
885 if (Token
->TokenType
!= TokenImpersonation
)
887 DPRINT("No impersonation token\n");
888 ObDereferenceObject(Token
);
889 return STATUS_NO_IMPERSONATION_TOKEN
;
892 /* Check the impersonation level */
893 if (Token
->ImpersonationLevel
< SecurityIdentification
)
895 DPRINT("Impersonation level < SecurityIdentification\n");
896 ObDereferenceObject(Token
);
897 return STATUS_BAD_IMPERSONATION_LEVEL
;
900 /* Capture the security descriptor */
901 Status
= SeCaptureSecurityDescriptor(SecurityDescriptor
,
905 &CapturedSecurityDescriptor
);
906 if (!NT_SUCCESS(Status
))
908 DPRINT("Failed to capture the Security Descriptor\n");
909 ObDereferenceObject(Token
);
913 /* Check the captured security descriptor */
914 if (CapturedSecurityDescriptor
== NULL
)
916 DPRINT("Security Descriptor is NULL\n");
917 ObDereferenceObject(Token
);
918 return STATUS_INVALID_SECURITY_DESCR
;
921 /* Check security descriptor for valid owner and group */
922 if (SepGetSDOwner(SecurityDescriptor
) == NULL
|| // FIXME: use CapturedSecurityDescriptor
923 SepGetSDGroup(SecurityDescriptor
) == NULL
) // FIXME: use CapturedSecurityDescriptor
925 DPRINT("Security Descriptor does not have a valid group or owner\n");
926 SeReleaseSecurityDescriptor(CapturedSecurityDescriptor
,
929 ObDereferenceObject(Token
);
930 return STATUS_INVALID_SECURITY_DESCR
;
933 /* Set up the subject context, and lock it */
934 SubjectSecurityContext
.ClientToken
= Token
;
935 SubjectSecurityContext
.ImpersonationLevel
= Token
->ImpersonationLevel
;
936 SubjectSecurityContext
.PrimaryToken
= NULL
;
937 SubjectSecurityContext
.ProcessAuditId
= NULL
;
938 SeLockSubjectContext(&SubjectSecurityContext
);
940 /* Check if the token is the owner and grant WRITE_DAC and READ_CONTROL rights */
941 if (DesiredAccess
& (WRITE_DAC
| READ_CONTROL
| MAXIMUM_ALLOWED
))
943 if (SepTokenIsOwner(Token
, SecurityDescriptor
)) // FIXME: use CapturedSecurityDescriptor
945 if (DesiredAccess
& MAXIMUM_ALLOWED
)
946 PreviouslyGrantedAccess
|= (WRITE_DAC
| READ_CONTROL
);
948 PreviouslyGrantedAccess
|= (DesiredAccess
& (WRITE_DAC
| READ_CONTROL
));
950 DesiredAccess
&= ~(WRITE_DAC
| READ_CONTROL
);
954 if (DesiredAccess
== 0)
956 *GrantedAccess
= PreviouslyGrantedAccess
;
957 *AccessStatus
= STATUS_SUCCESS
;
961 /* Now perform the access check */
962 SepAccessCheck(SecurityDescriptor
, // FIXME: use CapturedSecurityDescriptor
963 &SubjectSecurityContext
,
965 PreviouslyGrantedAccess
,
966 &PrivilegeSet
, //FIXME
973 /* Unlock subject context */
974 SeUnlockSubjectContext(&SubjectSecurityContext
);
976 /* Release the captured security descriptor */
977 SeReleaseSecurityDescriptor(CapturedSecurityDescriptor
,
981 /* Dereference the token */
982 ObDereferenceObject(Token
);
984 /* Check succeeded */
985 return STATUS_SUCCESS
;
991 NtAccessCheckByType(IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
992 IN PSID PrincipalSelfSid
,
993 IN HANDLE ClientToken
,
994 IN ACCESS_MASK DesiredAccess
,
995 IN POBJECT_TYPE_LIST ObjectTypeList
,
996 IN ULONG ObjectTypeLength
,
997 IN PGENERIC_MAPPING GenericMapping
,
998 IN PPRIVILEGE_SET PrivilegeSet
,
999 IN ULONG PrivilegeSetLength
,
1000 OUT PACCESS_MASK GrantedAccess
,
1001 OUT PNTSTATUS AccessStatus
)
1004 return STATUS_NOT_IMPLEMENTED
;
1009 NtAccessCheckByTypeAndAuditAlarm(IN PUNICODE_STRING SubsystemName
,
1011 IN PUNICODE_STRING ObjectTypeName
,
1012 IN PUNICODE_STRING ObjectName
,
1013 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1014 IN PSID PrincipalSelfSid
,
1015 IN ACCESS_MASK DesiredAccess
,
1016 IN AUDIT_EVENT_TYPE AuditType
,
1018 IN POBJECT_TYPE_LIST ObjectTypeList
,
1019 IN ULONG ObjectTypeLength
,
1020 IN PGENERIC_MAPPING GenericMapping
,
1021 IN BOOLEAN ObjectCreation
,
1022 OUT PACCESS_MASK GrantedAccess
,
1023 OUT PNTSTATUS AccessStatus
,
1024 OUT PBOOLEAN GenerateOnClose
)
1027 return STATUS_NOT_IMPLEMENTED
;
1032 NtAccessCheckByTypeResultList(IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1033 IN PSID PrincipalSelfSid
,
1034 IN HANDLE ClientToken
,
1035 IN ACCESS_MASK DesiredAccess
,
1036 IN POBJECT_TYPE_LIST ObjectTypeList
,
1037 IN ULONG ObjectTypeLength
,
1038 IN PGENERIC_MAPPING GenericMapping
,
1039 IN PPRIVILEGE_SET PrivilegeSet
,
1040 IN ULONG PrivilegeSetLength
,
1041 OUT PACCESS_MASK GrantedAccess
,
1042 OUT PNTSTATUS AccessStatus
)
1045 return STATUS_NOT_IMPLEMENTED
;
1050 NtAccessCheckByTypeResultListAndAuditAlarm(IN PUNICODE_STRING SubsystemName
,
1052 IN PUNICODE_STRING ObjectTypeName
,
1053 IN PUNICODE_STRING ObjectName
,
1054 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1055 IN PSID PrincipalSelfSid
,
1056 IN ACCESS_MASK DesiredAccess
,
1057 IN AUDIT_EVENT_TYPE AuditType
,
1059 IN POBJECT_TYPE_LIST ObjectTypeList
,
1060 IN ULONG ObjectTypeLength
,
1061 IN PGENERIC_MAPPING GenericMapping
,
1062 IN BOOLEAN ObjectCreation
,
1063 OUT PACCESS_MASK GrantedAccess
,
1064 OUT PNTSTATUS AccessStatus
,
1065 OUT PBOOLEAN GenerateOnClose
)
1068 return STATUS_NOT_IMPLEMENTED
;
1073 NtAccessCheckByTypeResultListAndAuditAlarmByHandle(IN PUNICODE_STRING SubsystemName
,
1075 IN HANDLE ClientToken
,
1076 IN PUNICODE_STRING ObjectTypeName
,
1077 IN PUNICODE_STRING ObjectName
,
1078 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1079 IN PSID PrincipalSelfSid
,
1080 IN ACCESS_MASK DesiredAccess
,
1081 IN AUDIT_EVENT_TYPE AuditType
,
1083 IN POBJECT_TYPE_LIST ObjectTypeList
,
1084 IN ULONG ObjectTypeLength
,
1085 IN PGENERIC_MAPPING GenericMapping
,
1086 IN BOOLEAN ObjectCreation
,
1087 OUT PACCESS_MASK GrantedAccess
,
1088 OUT PNTSTATUS AccessStatus
,
1089 OUT PBOOLEAN GenerateOnClose
)
1092 return STATUS_NOT_IMPLEMENTED
;