Thomas Weidenmueller <w3seek@reactos.com>
[reactos.git] / reactos / ntoskrnl / se / token.c
index 003300c..e7a707e 100644 (file)
@@ -1,23 +1,16 @@
-/* $Id: token.c,v 1.37 2004/07/13 08:43:35 ekohl Exp $
+/* $Id$
  *
- * COPYRIGHT:         See COPYING in the top level directory
- * PROJECT:           ReactOS kernel
- * PURPOSE:           Security manager
- * FILE:              kernel/se/token.c
- * PROGRAMER:         David Welch <welch@cwcom.net>
- * REVISION HISTORY:
- *                 26/07/98: Added stubs for security functions
+ * COPYRIGHT:       See COPYING in the top level directory
+ * PROJECT:         ReactOS kernel
+ * FILE:            ntoskrnl/se/token.c
+ * PURPOSE:         Security manager
+ * 
+ * PROGRAMMERS:     David Welch <welch@cwcom.net>
  */
 
 /* INCLUDES *****************************************************************/
 
-#include <limits.h>
-#define NTOS_MODE_KERNEL
-#include <ntos.h>
-#include <internal/ob.h>
-#include <internal/ps.h>
-#include <internal/se.h>
-#include <internal/safe.h>
+#include <ntoskrnl.h>
 
 #define NDEBUG
 #include <internal/debug.h>
 /* GLOBALS *******************************************************************/
 
 POBJECT_TYPE SepTokenObjectType = NULL;
+ERESOURCE SepTokenLock;
 
 static GENERIC_MAPPING SepTokenMapping = {TOKEN_READ,
                                          TOKEN_WRITE,
                                          TOKEN_EXECUTE,
                                          TOKEN_ALL_ACCESS};
 
-#define SYSTEM_LUID                      0x3E7;
+static const INFORMATION_CLASS_INFO SeTokenInformationClass[] = {
+
+    /* Class 0 not used, blame M$! */
+    ICI_SQ_SAME( 0, 0, 0),
+
+    /* TokenUser */
+    ICI_SQ_SAME( sizeof(TOKEN_USER),                   sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenGroups */
+    ICI_SQ_SAME( sizeof(TOKEN_GROUPS),                 sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenPrivileges */
+    ICI_SQ_SAME( sizeof(TOKEN_PRIVILEGES),             sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenOwner */
+    ICI_SQ_SAME( sizeof(TOKEN_OWNER),                  sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenPrimaryGroup */
+    ICI_SQ_SAME( sizeof(TOKEN_PRIMARY_GROUP),          sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenDefaultDacl */
+    ICI_SQ_SAME( sizeof(TOKEN_DEFAULT_DACL),           sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenSource */
+    ICI_SQ_SAME( sizeof(TOKEN_SOURCE),                 sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenType */
+    ICI_SQ_SAME( sizeof(TOKEN_TYPE),                   sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenImpersonationLevel */
+    ICI_SQ_SAME( sizeof(SECURITY_IMPERSONATION_LEVEL), sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenStatistics */
+    ICI_SQ_SAME( sizeof(TOKEN_STATISTICS),             sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE | ICIF_SET | ICIF_SET_SIZE_VARIABLE ),
+    /* TokenRestrictedSids */
+    ICI_SQ_SAME( sizeof(TOKEN_GROUPS),                 sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenSessionId */
+    ICI_SQ_SAME( sizeof(ULONG),                        sizeof(ULONG), ICIF_QUERY | ICIF_SET ),
+    /* TokenGroupsAndPrivileges */
+    ICI_SQ_SAME( sizeof(TOKEN_GROUPS_AND_PRIVILEGES),  sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenSessionReference */
+    ICI_SQ_SAME( /* FIXME */0,                         sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenSandBoxInert */
+    ICI_SQ_SAME( sizeof(ULONG),                        sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenAuditPolicy */
+    ICI_SQ_SAME( /* FIXME */0,                         sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+    /* TokenOrigin */
+    ICI_SQ_SAME( sizeof(TOKEN_ORIGIN),                 sizeof(ULONG), ICIF_QUERY | ICIF_QUERY_SIZE_VARIABLE ),
+};
 
 /* FUNCTIONS *****************************************************************/
 
@@ -47,10 +80,13 @@ NTSTATUS SepCopyProxyData(PVOID* Dest, PVOID Src)
 }
 
 NTSTATUS SeExchangePrimaryToken(PEPROCESS Process,
-                               PACCESS_TOKEN NewToken,
+                               PACCESS_TOKEN NewTokenP,
                                PACCESS_TOKEN* OldTokenP)
 {
-   PACCESS_TOKEN OldToken;
+   PTOKEN OldToken;
+   PTOKEN NewToken = (PTOKEN)NewTokenP;
+   
+   PAGED_CODE();
    
    if (NewToken->TokenType != TokenPrimary)
      {
@@ -68,7 +104,7 @@ NTSTATUS SeExchangePrimaryToken(PEPROCESS Process,
                              SepTokenObjectType,
                              KernelMode);
    OldToken->TokenInUse = 0;
-   *OldTokenP = OldToken;
+   *OldTokenP = (PACCESS_TOKEN)OldToken;
    return(STATUS_SUCCESS);
 }
 
@@ -78,6 +114,8 @@ RtlLengthSidAndAttributes(ULONG Count,
 {
   ULONG i;
   ULONG uLength;
+  
+  PAGED_CODE();
 
   uLength = Count * sizeof(SID_AND_ATTRIBUTES);
   for (i = 0; i < Count; i++)
@@ -88,7 +126,7 @@ RtlLengthSidAndAttributes(ULONG Count,
 
 
 NTSTATUS
-SepFindPrimaryGroupAndDefaultOwner(PACCESS_TOKEN Token,
+SepFindPrimaryGroupAndDefaultOwner(PTOKEN Token,
                                   PSID PrimaryGroup,
                                   PSID DefaultOwner)
 {
@@ -131,28 +169,28 @@ SepFindPrimaryGroupAndDefaultOwner(PACCESS_TOKEN Token,
 
 
 NTSTATUS
-SepDuplicateToken(PACCESS_TOKEN Token,
+SepDuplicateToken(PTOKEN Token,
                  POBJECT_ATTRIBUTES ObjectAttributes,
+                 BOOLEAN EffectiveOnly,
                  TOKEN_TYPE TokenType,
                  SECURITY_IMPERSONATION_LEVEL Level,
-                 SECURITY_IMPERSONATION_LEVEL ExistingLevel,
                  KPROCESSOR_MODE PreviousMode,
-                 PACCESS_TOKEN* NewAccessToken)
+                 PTOKEN* NewAccessToken)
 {
-  NTSTATUS Status;
   ULONG uLength;
   ULONG i;
-  
   PVOID EndMem;
-
-  PACCESS_TOKEN AccessToken;
+  PTOKEN AccessToken;
+  NTSTATUS Status;
+  
+  PAGED_CODE();
 
   Status = ObCreateObject(PreviousMode,
                          SepTokenObjectType,
                          ObjectAttributes,
                          PreviousMode,
                          NULL,
-                         sizeof(ACCESS_TOKEN),
+                         sizeof(TOKEN),
                          0,
                          0,
                          (PVOID*)&AccessToken);
@@ -176,11 +214,12 @@ SepDuplicateToken(PACCESS_TOKEN Token,
       return(Status);
     }
 
+  AccessToken->TokenLock = &SepTokenLock;
+
   AccessToken->TokenInUse = 0;
   AccessToken->TokenType  = TokenType;
   AccessToken->ImpersonationLevel = Level;
-  AccessToken->AuthenticationId.LowPart = SYSTEM_LUID;
-  AccessToken->AuthenticationId.HighPart = 0;
+  RtlCopyLuid(&AccessToken->AuthenticationId, &Token->AuthenticationId);
 
   AccessToken->TokenSource.SourceIdentifier.LowPart = Token->TokenSource.SourceIdentifier.LowPart;
   AccessToken->TokenSource.SourceIdentifier.HighPart = Token->TokenSource.SourceIdentifier.HighPart;
@@ -196,7 +235,7 @@ SepDuplicateToken(PACCESS_TOKEN Token,
     uLength += RtlLengthSid(Token->UserAndGroups[i].Sid);
 
   AccessToken->UserAndGroups = 
-    (PSID_AND_ATTRIBUTES)ExAllocatePoolWithTag(NonPagedPool,
+    (PSID_AND_ATTRIBUTES)ExAllocatePoolWithTag(PagedPool,
                                               uLength,
                                               TAG('T', 'O', 'K', 'u'));
 
@@ -223,7 +262,7 @@ SepDuplicateToken(PACCESS_TOKEN Token,
 
       uLength = AccessToken->PrivilegeCount * sizeof(LUID_AND_ATTRIBUTES);
       AccessToken->Privileges =
-       (PLUID_AND_ATTRIBUTES)ExAllocatePoolWithTag(NonPagedPool,
+       (PLUID_AND_ATTRIBUTES)ExAllocatePoolWithTag(PagedPool,
                                                    uLength,
                                                    TAG('T', 'O', 'K', 'p'));
 
@@ -238,7 +277,7 @@ SepDuplicateToken(PACCESS_TOKEN Token,
       if ( Token->DefaultDacl )
        {
          AccessToken->DefaultDacl =
-           (PACL) ExAllocatePoolWithTag(NonPagedPool,
+           (PACL) ExAllocatePoolWithTag(PagedPool,
                                         Token->DefaultDacl->AclSize,
                                         TAG('T', 'O', 'K', 'd'));
          memcpy(AccessToken->DefaultDacl,
@@ -267,8 +306,8 @@ SepInitializeNewProcess(struct _EPROCESS* NewProcess,
                        struct _EPROCESS* ParentProcess)
 {
   NTSTATUS Status;
-  PACCESS_TOKEN pNewToken;
-  PACCESS_TOKEN pParentToken;
+  PTOKEN pNewToken;
+  PTOKEN pParentToken;
   
   OBJECT_ATTRIBUTES ObjectAttributes;
 
@@ -282,9 +321,9 @@ SepInitializeNewProcess(struct _EPROCESS* NewProcess,
 
   Status = SepDuplicateToken(pParentToken,
                             &ObjectAttributes,
+                            FALSE,
                             TokenPrimary,
                             pParentToken->ImpersonationLevel,
-                            pParentToken->ImpersonationLevel,
                             KernelMode,
                             &pNewToken);
   if ( ! NT_SUCCESS(Status) )
@@ -294,14 +333,31 @@ SepInitializeNewProcess(struct _EPROCESS* NewProcess,
   return(STATUS_SUCCESS);
 }
 
+/*
+ * @unimplemented
+ */
+NTSTATUS
+STDCALL
+SeAppendPrivileges(
+       PACCESS_STATE AccessState,
+       PPRIVILEGE_SET Privileges
+       )
+{
+       UNIMPLEMENTED;
+       return STATUS_NOT_IMPLEMENTED;
+}
 
-NTSTATUS SeCopyClientToken(PACCESS_TOKEN Token,
-                          SECURITY_IMPERSONATION_LEVEL Level,
-                          KPROCESSOR_MODE PreviousMode,
-                          PACCESS_TOKEN* NewToken)
+NTSTATUS
+STDCALL
+SeCopyClientToken(PACCESS_TOKEN Token,
+                  SECURITY_IMPERSONATION_LEVEL Level,
+                 KPROCESSOR_MODE PreviousMode,
+                 PACCESS_TOKEN* NewToken)
 {
    NTSTATUS Status;
    OBJECT_ATTRIBUTES ObjectAttributes;
+   
+   PAGED_CODE();
      
    InitializeObjectAttributes(&ObjectAttributes,
                              NULL,
@@ -310,11 +366,12 @@ NTSTATUS SeCopyClientToken(PACCESS_TOKEN Token,
                              NULL);
    Status = SepDuplicateToken(Token,
                                &ObjectAttributes,
-                               0,
-                               SecurityIdentification,
+                               FALSE,
+                               TokenImpersonation,
                                Level,
                                PreviousMode,
-                               NewToken);
+                               (PTOKEN*)NewToken);
+   
    return(Status);
 }
 
@@ -335,11 +392,13 @@ SeCreateClientSecurity(IN struct _ETHREAD *Thread,
    ULONG g;
    PACCESS_TOKEN NewToken;
    
+   PAGED_CODE();
+   
    Token = PsReferenceEffectiveToken(Thread,
                                     &TokenType,
                                     &b,
                                     &ImpersonationLevel);
-   if (TokenType != 2)
+   if (TokenType != TokenImpersonation)
      {
        ClientContext->DirectAccessEffectiveOnly = Qos->EffectiveOnly;
      }
@@ -353,9 +412,9 @@ SeCreateClientSecurity(IN struct _ETHREAD *Thread,
               }
             return(STATUS_UNSUCCESSFUL);
          }
-       if (ImpersonationLevel == 0 ||
-           ImpersonationLevel == 1 ||
-           (RemoteClient != FALSE && ImpersonationLevel != 3))
+       if (ImpersonationLevel == SecurityAnonymous ||
+           ImpersonationLevel == SecurityIdentification ||
+           (RemoteClient != FALSE && ImpersonationLevel != SecurityDelegation))
          {
             if (Token != NULL)
               {
@@ -405,11 +464,71 @@ SeCreateClientSecurity(IN struct _ETHREAD *Thread,
   ClientContext->SecurityQos.ContextTrackingMode = Qos->ContextTrackingMode;
   ClientContext->SecurityQos.EffectiveOnly = Qos->EffectiveOnly;
   ClientContext->ServerIsRemote = RemoteClient;
-  ClientContext->Token = NewToken;
+  ClientContext->ClientToken = NewToken;
 
   return(STATUS_SUCCESS);
 }
 
+/*
+ * @unimplemented
+ */
+NTSTATUS
+STDCALL
+SeCreateClientSecurityFromSubjectContext(
+       IN PSECURITY_SUBJECT_CONTEXT SubjectContext,
+       IN PSECURITY_QUALITY_OF_SERVICE ClientSecurityQos,
+       IN BOOLEAN ServerIsRemote,
+       OUT PSECURITY_CLIENT_CONTEXT ClientContext
+       )
+{
+       UNIMPLEMENTED;
+       return STATUS_NOT_IMPLEMENTED;
+}
+
+/*
+ * @unimplemented
+ */
+NTSTATUS
+STDCALL
+SeFilterToken(
+       IN PACCESS_TOKEN ExistingToken,
+       IN ULONG Flags,
+       IN PTOKEN_GROUPS SidsToDisable OPTIONAL,
+       IN PTOKEN_PRIVILEGES PrivilegesToDelete OPTIONAL,
+       IN PTOKEN_GROUPS RestrictedSids OPTIONAL,
+       OUT PACCESS_TOKEN * FilteredToken
+       )
+{
+       UNIMPLEMENTED;
+       return STATUS_NOT_IMPLEMENTED;
+}
+
+/*
+ * @unimplemented
+ */
+VOID
+STDCALL
+SeFreePrivileges(
+       IN PPRIVILEGE_SET Privileges
+       )
+{
+       UNIMPLEMENTED;
+}
+
+
+/*
+ * @unimplemented
+ */
+NTSTATUS
+STDCALL
+SeImpersonateClientEx(
+       IN PSECURITY_CLIENT_CONTEXT ClientContext,
+       IN PETHREAD ServerThread OPTIONAL
+       )
+{
+       UNIMPLEMENTED;
+       return STATUS_NOT_IMPLEMENTED;
+}
 
 /*
  * @implemented
@@ -420,6 +539,8 @@ SeImpersonateClient(IN PSECURITY_CLIENT_CONTEXT ClientContext,
 {
   UCHAR b;
   
+  PAGED_CODE();
+  
   if (ClientContext->DirectlyAccessClientToken == FALSE)
     {
       b = ClientContext->SecurityQos.EffectiveOnly;
@@ -433,7 +554,7 @@ SeImpersonateClient(IN PSECURITY_CLIENT_CONTEXT ClientContext,
       ServerThread = PsGetCurrentThread();
     }
   PsImpersonateClient(ServerThread,
-                     ClientContext->Token,
+                     ClientContext->ClientToken,
                      1,
                      (ULONG)b,
                      ClientContext->SecurityQos.ImpersonationLevel);
@@ -443,7 +564,7 @@ SeImpersonateClient(IN PSECURITY_CLIENT_CONTEXT ClientContext,
 VOID STDCALL
 SepDeleteToken(PVOID ObjectBody)
 {
-  PACCESS_TOKEN AccessToken = (PACCESS_TOKEN)ObjectBody;
+  PTOKEN AccessToken = (PTOKEN)ObjectBody;
 
   if (AccessToken->UserAndGroups)
     ExFreePool(AccessToken->UserAndGroups);
@@ -459,15 +580,17 @@ SepDeleteToken(PVOID ObjectBody)
 VOID INIT_FUNCTION
 SepInitializeTokenImplementation(VOID)
 {
+  ExInitializeResource(&SepTokenLock);
+
   SepTokenObjectType = ExAllocatePool(NonPagedPool, sizeof(OBJECT_TYPE));
 
   SepTokenObjectType->Tag = TAG('T', 'O', 'K', 'T');
-  SepTokenObjectType->MaxObjects = ULONG_MAX;
-  SepTokenObjectType->MaxHandles = ULONG_MAX;
+  SepTokenObjectType->PeakObjects = 0;
+  SepTokenObjectType->PeakHandles = 0;
   SepTokenObjectType->TotalObjects = 0;
   SepTokenObjectType->TotalHandles = 0;
   SepTokenObjectType->PagedPoolCharge = 0;
-  SepTokenObjectType->NonpagedPoolCharge = sizeof(ACCESS_TOKEN);
+  SepTokenObjectType->NonpagedPoolCharge = sizeof(TOKEN);
   SepTokenObjectType->Mapping = &SepTokenMapping;
   SepTokenObjectType->Dump = NULL;
   SepTokenObjectType->Open = NULL;
@@ -480,8 +603,7 @@ SepInitializeTokenImplementation(VOID)
   SepTokenObjectType->Create = NULL;
   SepTokenObjectType->DuplicationNotify = NULL;
 
-  RtlCreateUnicodeString(&SepTokenObjectType->TypeName,
-                        L"Token");
+  RtlInitUnicodeString(&SepTokenObjectType->TypeName, L"Token");
   ObpCreateTypeObject (SepTokenObjectType);
 }
 
@@ -496,255 +618,547 @@ NtQueryInformationToken(IN HANDLE TokenHandle,
                        IN ULONG TokenInformationLength,
                        OUT PULONG ReturnLength)
 {
-  NTSTATUS Status;
-  PVOID UnusedInfo;
-  PVOID EndMem;
-  PACCESS_TOKEN Token;
-  ULONG Length;
-  PTOKEN_GROUPS PtrTokenGroups;
-  PTOKEN_DEFAULT_DACL PtrDefaultDacl;
-  PTOKEN_STATISTICS PtrTokenStatistics;
+  union
+  {
+    PVOID Ptr;
+    ULONG Ulong;
+  } Unused;
+  PTOKEN Token;
+  ULONG RequiredLength;
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  /* Check buffers and class validity */
+  DefaultQueryInfoBufferCheck(TokenInformationClass,
+                              SeTokenInformationClass,
+                              TokenInformation,
+                              TokenInformationLength,
+                              ReturnLength,
+                              PreviousMode,
+                              &Status);
+
+  if(!NT_SUCCESS(Status))
+  {
+    DPRINT("NtQueryInformationToken() failed, Status: 0x%x\n", Status);
+    return Status;
+  }
 
   Status = ObReferenceObjectByHandle(TokenHandle,
                                     (TokenInformationClass == TokenSource) ? TOKEN_QUERY_SOURCE : TOKEN_QUERY,
                                     SepTokenObjectType,
-                                    UserMode,
+                                    PreviousMode,
                                     (PVOID*)&Token,
                                     NULL);
-  if (!NT_SUCCESS(Status))
-    {
-      return(Status);
-    }
-
-  switch (TokenInformationClass)
+  if (NT_SUCCESS(Status))
+  {
+    switch (TokenInformationClass)
     {
       case TokenUser:
-       DPRINT("NtQueryInformationToken(TokenUser)\n");
-       Length = RtlLengthSidAndAttributes(1, Token->UserAndGroups);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           Status = RtlCopySidAndAttributesArray(1,
-                                                 Token->UserAndGroups,
-                                                 TokenInformationLength,
-                                                 TokenInformation,
-                                                 (char*)TokenInformation + 8,
-                                                 &UnusedInfo,
-                                                 &Length);
-           if (NT_SUCCESS(Status))
-             {
-               Length = TokenInformationLength - Length;
-               Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-             }
-         }
-       break;
+      {
+        PTOKEN_USER tu = (PTOKEN_USER)TokenInformation;
+        
+        DPRINT("NtQueryInformationToken(TokenUser)\n");
+        RequiredLength = sizeof(TOKEN_USER) +
+                         RtlLengthSid(Token->UserAndGroups[0].Sid);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            Status = RtlCopySidAndAttributesArray(1,
+                                                  &Token->UserAndGroups[0],
+                                                  RequiredLength - sizeof(TOKEN_USER),
+                                                  &tu->User,
+                                                  (PSID)(tu + 1),
+                                                  &Unused.Ptr,
+                                                  &Unused.Ulong);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+          
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+        
+        break;
+      }
        
       case TokenGroups:
-       DPRINT("NtQueryInformationToken(TokenGroups)\n");
-       Length = RtlLengthSidAndAttributes(Token->UserAndGroupCount - 1, &Token->UserAndGroups[1]) + sizeof(ULONG);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           EndMem = (char*)TokenInformation + Token->UserAndGroupCount * sizeof(SID_AND_ATTRIBUTES);
-           PtrTokenGroups = (PTOKEN_GROUPS)TokenInformation;
-           PtrTokenGroups->GroupCount = Token->UserAndGroupCount - 1;
-           Status = RtlCopySidAndAttributesArray(Token->UserAndGroupCount - 1,
-                                                 &Token->UserAndGroups[1],
-                                                 TokenInformationLength,
-                                                 PtrTokenGroups->Groups,
-                                                 EndMem,
-                                                 &UnusedInfo,
-                                                 &Length);
-           if (NT_SUCCESS(Status))
-             {
-               Length = TokenInformationLength - Length;
-               Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-             }
-         }
+      {
+        PTOKEN_GROUPS tg = (PTOKEN_GROUPS)TokenInformation;
+        
+        DPRINT("NtQueryInformationToken(TokenGroups)\n");
+        RequiredLength = sizeof(tg->GroupCount) +
+                         RtlLengthSidAndAttributes(Token->UserAndGroupCount - 1, &Token->UserAndGroups[1]);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            ULONG SidLen = RequiredLength - sizeof(tg->GroupCount) -
+                           ((Token->UserAndGroupCount - 1) * sizeof(SID_AND_ATTRIBUTES));
+            PSID_AND_ATTRIBUTES Sid = (PSID_AND_ATTRIBUTES)((ULONG_PTR)TokenInformation + sizeof(tg->GroupCount) +
+                                                            ((Token->UserAndGroupCount - 1) * sizeof(SID_AND_ATTRIBUTES)));
+
+            tg->GroupCount = Token->UserAndGroupCount - 1;
+            Status = RtlCopySidAndAttributesArray(Token->UserAndGroupCount - 1,
+                                                  &Token->UserAndGroups[1],
+                                                  SidLen,
+                                                  &tg->Groups[0],
+                                                  (PSID)Sid,
+                                                  &Unused.Ptr,
+                                                  &Unused.Ulong);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+        
        break;
-
+      }
+      
       case TokenPrivileges:
-       DPRINT("NtQueryInformationToken(TokenPrivileges)\n");
-       Length = sizeof(ULONG) + Token->PrivilegeCount * sizeof(LUID_AND_ATTRIBUTES);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           ULONG i;
-           TOKEN_PRIVILEGES* pPriv = (TOKEN_PRIVILEGES*)TokenInformation;
-
-           pPriv->PrivilegeCount = Token->PrivilegeCount;
-           for (i = 0; i < Token->PrivilegeCount; i++)
-             {
-               RtlCopyLuid(&pPriv->Privileges[i].Luid, &Token->Privileges[i].Luid);
-               pPriv->Privileges[i].Attributes = Token->Privileges[i].Attributes;
-             }
-           Status = STATUS_SUCCESS;
-         }
-       break;
-
+      {
+        PTOKEN_PRIVILEGES tp = (PTOKEN_PRIVILEGES)TokenInformation;
+        
+        DPRINT("NtQueryInformationToken(TokenPrivileges)\n");
+        RequiredLength = sizeof(tp->PrivilegeCount) +
+                         (Token->PrivilegeCount * sizeof(LUID_AND_ATTRIBUTES));
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            tp->PrivilegeCount = Token->PrivilegeCount;
+            RtlCopyLuidAndAttributesArray(Token->PrivilegeCount,
+                                          Token->Privileges,
+                                          &tp->Privileges[0]);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+          
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+        
+        break;
+      }
+      
       case TokenOwner:
-       DPRINT("NtQueryInformationToken(TokenOwner)\n");
-       Length = RtlLengthSid(Token->UserAndGroups[Token->DefaultOwnerIndex].Sid) + sizeof(TOKEN_OWNER);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           ((PTOKEN_OWNER)TokenInformation)->Owner = 
-             (PSID)(((PTOKEN_OWNER)TokenInformation) + 1);
-           RtlCopySid(TokenInformationLength - sizeof(TOKEN_OWNER),
-                      ((PTOKEN_OWNER)TokenInformation)->Owner,
-                      Token->UserAndGroups[Token->DefaultOwnerIndex].Sid);
-           Status = STATUS_SUCCESS;
-         }
-       break;
-
+      {
+        ULONG SidLen;
+        PTOKEN_OWNER to = (PTOKEN_OWNER)TokenInformation;
+        
+        DPRINT("NtQueryInformationToken(TokenOwner)\n");
+        SidLen = RtlLengthSid(Token->UserAndGroups[Token->DefaultOwnerIndex].Sid);
+        RequiredLength = sizeof(TOKEN_OWNER) + SidLen;
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            to->Owner = (PSID)(to + 1);
+            Status = RtlCopySid(SidLen,
+                                to->Owner,
+                                Token->UserAndGroups[Token->DefaultOwnerIndex].Sid);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+          
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+        
+        break;
+      }
+      
       case TokenPrimaryGroup:
-       DPRINT("NtQueryInformationToken(TokenPrimaryGroup),"
-              "Token->PrimaryGroup = 0x%08x\n", Token->PrimaryGroup);
-       Length = RtlLengthSid(Token->PrimaryGroup) + sizeof(TOKEN_PRIMARY_GROUP);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           ((PTOKEN_PRIMARY_GROUP)TokenInformation)->PrimaryGroup = 
-             (PSID)(((PTOKEN_PRIMARY_GROUP)TokenInformation) + 1);
-           RtlCopySid(TokenInformationLength - sizeof(TOKEN_PRIMARY_GROUP),
-                      ((PTOKEN_PRIMARY_GROUP)TokenInformation)->PrimaryGroup,
-                      Token->PrimaryGroup);
-           Status = STATUS_SUCCESS;
-         }
-       break;
-
+      {
+        ULONG SidLen;
+        PTOKEN_PRIMARY_GROUP tpg = (PTOKEN_PRIMARY_GROUP)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenPrimaryGroup)\n");
+        SidLen = RtlLengthSid(Token->PrimaryGroup);
+        RequiredLength = sizeof(TOKEN_PRIMARY_GROUP) + SidLen;
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            tpg->PrimaryGroup = (PSID)(tpg + 1);
+            Status = RtlCopySid(SidLen,
+                                tpg->PrimaryGroup,
+                                Token->PrimaryGroup);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
       case TokenDefaultDacl:
-       DPRINT("NtQueryInformationToken(TokenDefaultDacl)\n");
-       PtrDefaultDacl = (PTOKEN_DEFAULT_DACL) TokenInformation;
-       Length = (Token->DefaultDacl ? Token->DefaultDacl->AclSize : 0) + sizeof(TOKEN_DEFAULT_DACL);
-       if (TokenInformationLength < Length)
-         {
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else if (!Token->DefaultDacl)
-         {
-           PtrDefaultDacl->DefaultDacl = 0;
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-         }
-       else
-         {
-           PtrDefaultDacl->DefaultDacl = (PACL) (PtrDefaultDacl + 1);
-           memmove(PtrDefaultDacl->DefaultDacl,
-                   Token->DefaultDacl,
-                   Token->DefaultDacl->AclSize);
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-         }
-       break;
-
+      {
+        PTOKEN_DEFAULT_DACL tdd = (PTOKEN_DEFAULT_DACL)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenDefaultDacl)\n");
+        RequiredLength = sizeof(TOKEN_DEFAULT_DACL);
+        
+        if(Token->DefaultDacl != NULL)
+        {
+          RequiredLength += Token->DefaultDacl->AclSize;
+        }
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            if(Token->DefaultDacl != NULL)
+            {
+              tdd->DefaultDacl = (PACL)(tdd + 1);
+              RtlCopyMemory(tdd->DefaultDacl,
+                            Token->DefaultDacl,
+                            Token->DefaultDacl->AclSize);
+            }
+            else
+            {
+              tdd->DefaultDacl = NULL;
+            }
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
       case TokenSource:
-       DPRINT("NtQueryInformationToken(TokenSource)\n");
-       if (TokenInformationLength < sizeof(TOKEN_SOURCE))
-         {
-           Length = sizeof(TOKEN_SOURCE);
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           Status = MmCopyToCaller(TokenInformation, &Token->TokenSource, sizeof(TOKEN_SOURCE));
-         }
+      {
+        PTOKEN_SOURCE ts = (PTOKEN_SOURCE)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenSource)\n");
+        RequiredLength = sizeof(TOKEN_SOURCE);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            *ts = Token->TokenSource;
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
+      case TokenType:
+      {
+        PTOKEN_TYPE tt = (PTOKEN_TYPE)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenType)\n");
+        RequiredLength = sizeof(TOKEN_TYPE);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            *tt = Token->TokenType;
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
+      case TokenImpersonationLevel:
+      {
+        PSECURITY_IMPERSONATION_LEVEL sil = (PSECURITY_IMPERSONATION_LEVEL)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenImpersonationLevel)\n");
+        RequiredLength = sizeof(SECURITY_IMPERSONATION_LEVEL);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            *sil = Token->ImpersonationLevel;
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
+      case TokenStatistics:
+      {
+        PTOKEN_STATISTICS ts = (PTOKEN_STATISTICS)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenStatistics)\n");
+        RequiredLength = sizeof(TOKEN_STATISTICS);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            ts->TokenId = Token->TokenId;
+            ts->AuthenticationId = Token->AuthenticationId;
+            ts->ExpirationTime = Token->ExpirationTime;
+            ts->TokenType = Token->TokenType;
+            ts->ImpersonationLevel = Token->ImpersonationLevel;
+            ts->DynamicCharged = Token->DynamicCharged;
+            ts->DynamicAvailable = Token->DynamicAvailable;
+            ts->GroupCount = Token->UserAndGroupCount - 1;
+            ts->PrivilegeCount = Token->PrivilegeCount;
+            ts->ModifiedId = Token->ModifiedId;
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+      
+      case TokenOrigin:
+      {
+        PTOKEN_ORIGIN to = (PTOKEN_ORIGIN)TokenInformation;
+
+        DPRINT("NtQueryInformationToken(TokenOrigin)\n");
+        RequiredLength = sizeof(TOKEN_ORIGIN);
+
+        _SEH_TRY
+        {
+          if(TokenInformationLength >= RequiredLength)
+          {
+            RtlCopyLuid(&to->OriginatingLogonSession,
+                        &Token->AuthenticationId);
+          }
+          else
+          {
+            Status = STATUS_BUFFER_TOO_SMALL;
+          }
+
+          if(ReturnLength != NULL)
+          {
+            *ReturnLength = RequiredLength;
+          }
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        break;
+      }
+
+      case TokenGroupsAndPrivileges:
+       DPRINT1("NtQueryInformationToken(TokenGroupsAndPrivileges) not implemented\n");
+       Status = STATUS_NOT_IMPLEMENTED;
        break;
 
-      case TokenType:
-       DPRINT("NtQueryInformationToken(TokenType)\n");
-       if (TokenInformationLength < sizeof(TOKEN_TYPE))
-         {
-           Length = sizeof(TOKEN_TYPE);
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           Status = MmCopyToCaller(TokenInformation, &Token->TokenType, sizeof(TOKEN_TYPE));
-         }
+      case TokenRestrictedSids:
+       DPRINT1("NtQueryInformationToken(TokenRestrictedSids) not implemented\n");
+       Status = STATUS_NOT_IMPLEMENTED;
        break;
 
-      case TokenImpersonationLevel:
-       DPRINT("NtQueryInformationToken(TokenImpersonationLevel)\n");
-       if (TokenInformationLength < sizeof(SECURITY_IMPERSONATION_LEVEL))
-         {
-           Length = sizeof(SECURITY_IMPERSONATION_LEVEL);
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           Status = MmCopyToCaller(TokenInformation, &Token->ImpersonationLevel, sizeof(SECURITY_IMPERSONATION_LEVEL));
-         }
+      case TokenSandBoxInert:
+       DPRINT1("NtQueryInformationToken(TokenSandboxInert) not implemented\n");
+       Status = STATUS_NOT_IMPLEMENTED;
        break;
 
-      case TokenStatistics:
-       DPRINT("NtQueryInformationToken(TokenStatistics)\n");
-       if (TokenInformationLength < sizeof(TOKEN_STATISTICS))
-         {
-           Length = sizeof(TOKEN_STATISTICS);
-           Status = MmCopyToCaller(ReturnLength, &Length, sizeof(ULONG));
-           if (NT_SUCCESS(Status))
-             Status = STATUS_BUFFER_TOO_SMALL;
-         }
-       else
-         {
-           PtrTokenStatistics = (PTOKEN_STATISTICS)TokenInformation;
-           PtrTokenStatistics->TokenId = Token->TokenId;
-           PtrTokenStatistics->AuthenticationId = Token->AuthenticationId;
-           PtrTokenStatistics->ExpirationTime = Token->ExpirationTime;
-           PtrTokenStatistics->TokenType = Token->TokenType;
-           PtrTokenStatistics->ImpersonationLevel = Token->ImpersonationLevel;
-           PtrTokenStatistics->DynamicCharged = Token->DynamicCharged;
-           PtrTokenStatistics->DynamicAvailable = Token->DynamicAvailable;
-           PtrTokenStatistics->GroupCount = Token->UserAndGroupCount - 1;
-           PtrTokenStatistics->PrivilegeCount = Token->PrivilegeCount;
-           PtrTokenStatistics->ModifiedId = Token->ModifiedId;
-
-           Status = STATUS_SUCCESS;
-         }
+      case TokenSessionId:
+      {
+        ULONG SessionId = 0;
+
+        DPRINT("NtQueryInformationToken(TokenSessionId)\n");
+        
+        Status = SeQuerySessionIdToken(Token,
+                                       &SessionId);
+
+        if(NT_SUCCESS(Status))
+        {
+          _SEH_TRY
+          {
+            /* buffer size was already verified, no need to check here again */
+            *(PULONG)TokenInformation = SessionId;
+
+            if(ReturnLength != NULL)
+            {
+              *ReturnLength = sizeof(ULONG);
+            }
+          }
+          _SEH_HANDLE
+          {
+            Status = _SEH_GetExceptionCode();
+          }
+          _SEH_END;
+        }
+        
+        break;
+      }
+
+      default:
+       DPRINT1("NtQueryInformationToken(%d) invalid information class\n", TokenInformationClass);
+       Status = STATUS_INVALID_INFO_CLASS;
        break;
     }
 
-  ObDereferenceObject(Token);
+    ObDereferenceObject(Token);
+  }
 
   return(Status);
 }
 
+/*
+ * @unimplemented
+ */
+NTSTATUS
+STDCALL
+SeQueryInformationToken(
+       IN PACCESS_TOKEN Token,
+       IN TOKEN_INFORMATION_CLASS TokenInformationClass,
+       OUT PVOID *TokenInformation
+       )
+{
+       UNIMPLEMENTED;
+       return STATUS_NOT_IMPLEMENTED;
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS
+STDCALL
+SeQuerySessionIdToken(
+       IN PACCESS_TOKEN Token,
+       IN PULONG pSessionId
+       )
+{
+  *pSessionId = ((PTOKEN)Token)->SessionId;
+  return STATUS_SUCCESS;
+}
+
 /*
  * NtSetTokenInformation: Partly implemented.
  * Unimplemented:
- *  TokenOrigin, TokenDefaultDacl, TokenSessionId
+ *  TokenOrigin, TokenDefaultDacl
  */
 
 NTSTATUS STDCALL
@@ -753,64 +1167,229 @@ NtSetInformationToken(IN HANDLE TokenHandle,
                      OUT PVOID TokenInformation,
                      IN ULONG TokenInformationLength)
 {
-  NTSTATUS Status;
-  PACCESS_TOKEN Token;
-  TOKEN_OWNER TokenOwnerSet = { 0 };
-  TOKEN_PRIMARY_GROUP TokenPrimaryGroupSet = { 0 };
-  DWORD NeededAccess = 0;
-
-  switch (TokenInformationClass) 
-    {
-    case TokenOwner:
-    case TokenPrimaryGroup:
-      NeededAccess = TOKEN_ADJUST_DEFAULT;
-      break;
-
-    default:
-      return STATUS_NOT_IMPLEMENTED;
-    }
+  PTOKEN Token;
+  KPROCESSOR_MODE PreviousMode;
+  ULONG NeededAccess = TOKEN_ADJUST_DEFAULT;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  DefaultSetInfoBufferCheck(TokenInformationClass,
+                            SeTokenInformationClass,
+                            TokenInformation,
+                            TokenInformationLength,
+                            PreviousMode,
+                            &Status);
+
+  if(!NT_SUCCESS(Status))
+  {
+    /* Invalid buffers */
+    DPRINT("NtSetInformationToken() failed, Status: 0x%x\n", Status);
+    return Status;
+  }
+  
+  if(TokenInformationClass == TokenSessionId)
+  {
+    NeededAccess |= TOKEN_ADJUST_SESSIONID;
+  }
 
   Status = ObReferenceObjectByHandle(TokenHandle,
                                     NeededAccess,
                                     SepTokenObjectType,
-                                    UserMode,
+                                    PreviousMode,
                                     (PVOID*)&Token,
                                     NULL);
-  if (!NT_SUCCESS(Status))
-    {
-      return(Status);
-    }
-
-  switch (TokenInformationClass)
+  if (NT_SUCCESS(Status))
+  {
+    switch (TokenInformationClass)
     {
-    case TokenOwner:
-      MmCopyFromCaller( &TokenOwnerSet, TokenInformation,
-                       min(sizeof(TokenOwnerSet),TokenInformationLength) );
-      RtlCopySid(TokenInformationLength - sizeof(TOKEN_OWNER),
-                Token->UserAndGroups[Token->DefaultOwnerIndex].Sid,
-                TokenOwnerSet.Owner);
-      Status = STATUS_SUCCESS;
-      DPRINT("NtSetInformationToken(TokenOwner)\n");
-      break;
+      case TokenOwner:
+      {
+        if(TokenInformationLength >= sizeof(TOKEN_OWNER))
+        {
+          PTOKEN_OWNER to = (PTOKEN_OWNER)TokenInformation;
+          PSID InputSid = NULL;
+          
+          _SEH_TRY
+          {
+            InputSid = to->Owner;
+          }
+          _SEH_HANDLE
+          {
+            Status = _SEH_GetExceptionCode();
+          }
+          _SEH_END;
+          
+          if(NT_SUCCESS(Status))
+          {
+            PSID CapturedSid;
+            
+            Status = SepCaptureSid(InputSid,
+                                   PreviousMode,
+                                   PagedPool,
+                                   FALSE,
+                                   &CapturedSid);
+            if(NT_SUCCESS(Status))
+            {
+              RtlCopySid(RtlLengthSid(CapturedSid),
+                         Token->UserAndGroups[Token->DefaultOwnerIndex].Sid,
+                         CapturedSid);
+              SepReleaseSid(CapturedSid,
+                            PreviousMode,
+                            FALSE);
+            }
+          }
+        }
+        else
+        {
+          Status = STATUS_INFO_LENGTH_MISMATCH;
+        }
+        break;
+      }
       
-    case TokenPrimaryGroup:
-      MmCopyFromCaller( &TokenPrimaryGroupSet, TokenInformation, 
-                       min(sizeof(TokenPrimaryGroupSet),
-                           TokenInformationLength) );
-      RtlCopySid(TokenInformationLength - sizeof(TOKEN_PRIMARY_GROUP),
-                Token->PrimaryGroup,
-                TokenPrimaryGroupSet.PrimaryGroup);
-      Status = STATUS_SUCCESS;
-      DPRINT("NtSetInformationToken(TokenPrimaryGroup),"
-            "Token->PrimaryGroup = 0x%08x\n", Token->PrimaryGroup);
-      break;
-
-    default:
-      Status = STATUS_NOT_IMPLEMENTED;
-      break;
+      case TokenPrimaryGroup:
+      {
+        if(TokenInformationLength >= sizeof(TOKEN_PRIMARY_GROUP))
+        {
+          PTOKEN_PRIMARY_GROUP tpg = (PTOKEN_PRIMARY_GROUP)TokenInformation;
+          PSID InputSid = NULL;
+
+          _SEH_TRY
+          {
+            InputSid = tpg->PrimaryGroup;
+          }
+          _SEH_HANDLE
+          {
+            Status = _SEH_GetExceptionCode();
+          }
+          _SEH_END;
+
+          if(NT_SUCCESS(Status))
+          {
+            PSID CapturedSid;
+
+            Status = SepCaptureSid(InputSid,
+                                   PreviousMode,
+                                   PagedPool,
+                                   FALSE,
+                                   &CapturedSid);
+            if(NT_SUCCESS(Status))
+            {
+              RtlCopySid(RtlLengthSid(CapturedSid),
+                         Token->PrimaryGroup,
+                         CapturedSid);
+              SepReleaseSid(CapturedSid,
+                            PreviousMode,
+                            FALSE);
+            }
+          }
+        }
+        else
+        {
+          Status = STATUS_INFO_LENGTH_MISMATCH;
+        }
+        break;
+      }
+      
+      case TokenDefaultDacl:
+      {
+        if(TokenInformationLength >= sizeof(TOKEN_DEFAULT_DACL))
+        {
+          PTOKEN_DEFAULT_DACL tdd = (PTOKEN_DEFAULT_DACL)TokenInformation;
+          PACL InputAcl = NULL;
+
+          _SEH_TRY
+          {
+            InputAcl = tdd->DefaultDacl;
+          }
+          _SEH_HANDLE
+          {
+            Status = _SEH_GetExceptionCode();
+          }
+          _SEH_END;
+
+          if(NT_SUCCESS(Status))
+          {
+            if(InputAcl != NULL)
+            {
+              PACL CapturedAcl;
+
+              /* capture and copy the dacl */
+              Status = SepCaptureAcl(InputAcl,
+                                     PreviousMode,
+                                     PagedPool,
+                                     TRUE,
+                                     &CapturedAcl);
+              if(NT_SUCCESS(Status))
+              {
+                /* free the previous dacl if present */
+                if(Token->DefaultDacl != NULL)
+                {
+                  ExFreePool(Token->DefaultDacl);
+                }
+                
+                /* set the new dacl */
+                Token->DefaultDacl = CapturedAcl;
+              }
+            }
+            else
+            {
+              /* clear and free the default dacl if present */
+              if(Token->DefaultDacl != NULL)
+              {
+                ExFreePool(Token->DefaultDacl);
+                Token->DefaultDacl = NULL;
+              }
+            }
+          }
+        }
+        else
+        {
+          Status = STATUS_INFO_LENGTH_MISMATCH;
+        }
+        break;
+      }
+      
+      case TokenSessionId:
+      {
+        ULONG SessionId = 0;
+
+        _SEH_TRY
+        {
+          /* buffer size was already verified, no need to check here again */
+          SessionId = *(PULONG)TokenInformation;
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+
+        if(NT_SUCCESS(Status))
+        {
+          if(!SeSinglePrivilegeCheck(SeTcbPrivilege,
+                                     PreviousMode))
+          {
+            Status = STATUS_PRIVILEGE_NOT_HELD;
+            break;
+          }
+
+          Token->SessionId = SessionId;
+        }
+        break;
+      }
+
+      default:
+      {
+        Status = STATUS_NOT_IMPLEMENTED;
+        break;
+      }
     }
 
-  ObDereferenceObject(Token);
+    ObDereferenceObject(Token);
+  }
 
   return(Status);
 }
@@ -818,67 +1397,114 @@ NtSetInformationToken(IN HANDLE TokenHandle,
 
 /*
  * @implemented
+ *
+ * NOTE: Some sources claim 4th param is ImpersonationLevel, but on W2K
+ * this is certainly NOT true, thou i can't say for sure that EffectiveOnly
+ * is correct either. -Gunnar
+ * This is true. EffectiveOnly overrides SQOS.EffectiveOnly. - IAI
  */
 NTSTATUS STDCALL
 NtDuplicateToken(IN HANDLE ExistingTokenHandle,
-                IN ACCESS_MASK DesiredAccess,
-                IN POBJECT_ATTRIBUTES ObjectAttributes,
-                IN SECURITY_IMPERSONATION_LEVEL ImpersonationLevel,
-                IN TOKEN_TYPE TokenType,
-                OUT PHANDLE NewTokenHandle)
+                 IN ACCESS_MASK DesiredAccess,
+                 IN POBJECT_ATTRIBUTES ObjectAttributes  OPTIONAL,
+                 IN BOOLEAN EffectiveOnly,
+                 IN TOKEN_TYPE TokenType,
+                 OUT PHANDLE NewTokenHandle)
 {
   KPROCESSOR_MODE PreviousMode;
-  PACCESS_TOKEN Token;
-  PACCESS_TOKEN NewToken;
-  NTSTATUS Status;
-  ULONG ExistingImpersonationLevel;
+  HANDLE hToken;
+  PTOKEN Token;
+  PTOKEN NewToken;
+  PSECURITY_QUALITY_OF_SERVICE CapturedSecurityQualityOfService;
+  BOOLEAN QoSPresent;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
 
   PreviousMode = KeGetPreviousMode();
-  Status = ObReferenceObjectByHandle(ExistingTokenHandle,
-                                    TOKEN_DUPLICATE,
-                                    SepTokenObjectType,
-                                    PreviousMode,
-                                    (PVOID*)&Token,
-                                    NULL);
-  if (!NT_SUCCESS(Status))
+  
+  if(PreviousMode != KernelMode)
+  {
+    _SEH_TRY
     {
-      DPRINT1("Failed to reference token (Status %lx)\n", Status);
-      return Status;
+      ProbeForWrite(NewTokenHandle,
+                    sizeof(HANDLE),
+                    sizeof(ULONG));
     }
-
-  ExistingImpersonationLevel = Token->ImpersonationLevel;
-  Status = SepDuplicateToken(Token,
-                            ObjectAttributes,
-                            TokenType,
-                            ImpersonationLevel,
-                            ExistingImpersonationLevel,
-                            PreviousMode,
-                            &NewToken);
-
-  ObDereferenceObject(Token);
-
-  if (!NT_SUCCESS(Status))
+    _SEH_HANDLE
     {
-      DPRINT1("Failed to duplicate token (Status %lx)\n", Status);
-      return Status;
+      Status = _SEH_GetExceptionCode();
     }
+    _SEH_END;
 
-  Status = ObInsertObject((PVOID)NewToken,
-                         NULL,
-                         DesiredAccess,
-                         0,
-                         NULL,
-                         NewTokenHandle);
-
-  ObDereferenceObject(NewToken);
-
-  if (!NT_SUCCESS(Status))
+    if(!NT_SUCCESS(Status))
     {
-      DPRINT1("Failed to create token handle (Status %lx)\n");
       return Status;
     }
+  }
+  
+  Status = SepCaptureSecurityQualityOfService(ObjectAttributes,
+                                              PreviousMode,
+                                              PagedPool,
+                                              FALSE,
+                                              &CapturedSecurityQualityOfService,
+                                              &QoSPresent);
+  if(!NT_SUCCESS(Status))
+  {
+    DPRINT1("NtDuplicateToken() failed to capture QoS! Status: 0x%x\n", Status);
+    return Status;
+  }
+  
+  Status = ObReferenceObjectByHandle(ExistingTokenHandle,
+                                    TOKEN_DUPLICATE,
+                                    SepTokenObjectType,
+                                    PreviousMode,
+                                    (PVOID*)&Token,
+                                    NULL);
+  if (NT_SUCCESS(Status))
+  {
+    Status = SepDuplicateToken(Token,
+                               ObjectAttributes,
+                               EffectiveOnly,
+                               TokenType,
+                               (QoSPresent ? CapturedSecurityQualityOfService->ImpersonationLevel : SecurityAnonymous),
+                              PreviousMode,
+                              &NewToken);
+
+    ObDereferenceObject(Token);
+
+    if (NT_SUCCESS(Status))
+    {
+      Status = ObInsertObject((PVOID)NewToken,
+                         NULL,
+                         DesiredAccess,
+                         0,
+                         NULL,
+                         &hToken);
+
+      ObDereferenceObject(NewToken);
+
+      if (NT_SUCCESS(Status))
+      {
+        _SEH_TRY
+        {
+          *NewTokenHandle = hToken;
+        }
+        _SEH_HANDLE
+        {
+          Status = _SEH_GetExceptionCode();
+        }
+        _SEH_END;
+      }
+    }
+  }
+  
+  /* free the captured structure */
+  SepReleaseSecurityQualityOfService(CapturedSecurityQualityOfService,
+                                     PreviousMode,
+                                     FALSE);
 
-  return STATUS_SUCCESS;
+  return Status;
 }
 
 
@@ -912,6 +1538,8 @@ NtAdjustGroupsToken(IN HANDLE TokenHandle,
    ULONG b;
    ULONG c;
    
+   PAGED_CODE();
+   
    Status = ObReferenceObjectByHandle(TokenHandle,
                                      ?,
                                      SepTokenObjectType,
@@ -1005,7 +1633,7 @@ NtAdjustPrivilegesToken (IN HANDLE TokenHandle,
 //  PLUID_AND_ATTRIBUTES Privileges;
   KPROCESSOR_MODE PreviousMode;
 //  ULONG PrivilegeCount;
-  PACCESS_TOKEN Token;
+  PTOKEN Token;
 //  ULONG Length;
   ULONG i;
   ULONG j;
@@ -1017,6 +1645,8 @@ NtAdjustPrivilegesToken (IN HANDLE TokenHandle,
    ULONG c;
 #endif
   NTSTATUS Status;
+  
+  PAGED_CODE();
 
   DPRINT ("NtAdjustPrivilegesToken() called\n");
 
@@ -1149,13 +1779,15 @@ SepCreateSystemProcessToken(struct _EPROCESS* Process)
   NTSTATUS Status;
   ULONG uSize;
   ULONG i;
+  
+  PAGED_CODE();
 
   ULONG uLocalSystemLength = RtlLengthSid(SeLocalSystemSid);
   ULONG uWorldLength       = RtlLengthSid(SeWorldSid);
   ULONG uAuthUserLength    = RtlLengthSid(SeAuthenticatedUserSid);
   ULONG uAdminsLength      = RtlLengthSid(SeAliasAdminsSid);
 
-  PACCESS_TOKEN AccessToken;
+  PTOKEN AccessToken;
 
   PVOID SidArea;
 
@@ -1167,7 +1799,7 @@ SepCreateSystemProcessToken(struct _EPROCESS* Process)
                          NULL,
                          KernelMode,
                          NULL,
-                         sizeof(ACCESS_TOKEN),
+                         sizeof(TOKEN),
                          0,
                          0,
                          (PVOID*)&AccessToken);
@@ -1176,22 +1808,28 @@ SepCreateSystemProcessToken(struct _EPROCESS* Process)
       return(Status);
     }
 
-  Status = NtAllocateLocallyUniqueId(&AccessToken->TokenId);
+  Status = ExpAllocateLocallyUniqueId(&AccessToken->TokenId);
   if (!NT_SUCCESS(Status))
     {
       ObDereferenceObject(AccessToken);
       return(Status);
     }
 
-  Status = NtAllocateLocallyUniqueId(&AccessToken->ModifiedId);
+  Status = ExpAllocateLocallyUniqueId(&AccessToken->ModifiedId);
   if (!NT_SUCCESS(Status))
     {
       ObDereferenceObject(AccessToken);
       return(Status);
     }
 
-  AccessToken->AuthenticationId.LowPart = SYSTEM_LUID;
-  AccessToken->AuthenticationId.HighPart = 0;
+  Status = ExpAllocateLocallyUniqueId(&AccessToken->AuthenticationId);
+  if (!NT_SUCCESS(Status))
+    {
+      ObDereferenceObject(AccessToken);
+      return Status;
+    }
+
+  AccessToken->TokenLock = &SepTokenLock;
 
   AccessToken->TokenType = TokenPrimary;
   AccessToken->ImpersonationLevel = SecurityDelegation;
@@ -1312,7 +1950,7 @@ SepCreateSystemProcessToken(struct _EPROCESS* Process)
   AccessToken->Privileges[i++].Luid = SeManageVolumePrivilege;
 #endif
 
-  assert( i == 20 );
+  ASSERT(i == 20);
 
   uSize = sizeof(ACL);
   uSize += sizeof(ACE) + uLocalSystemLength;
@@ -1345,9 +1983,9 @@ SepCreateSystemProcessToken(struct _EPROCESS* Process)
 
 
 NTSTATUS STDCALL
-NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
+NtCreateToken(OUT PHANDLE TokenHandle,
              IN ACCESS_MASK DesiredAccess,
-             IN POBJECT_ATTRIBUTES UnsafeObjectAttributes,
+             IN POBJECT_ATTRIBUTES ObjectAttributes,
              IN TOKEN_TYPE TokenType,
              IN PLUID AuthenticationId,
              IN PLARGE_INTEGER ExpirationTime,
@@ -1359,24 +1997,66 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
              IN PTOKEN_DEFAULT_DACL TokenDefaultDacl,
              IN PTOKEN_SOURCE TokenSource)
 {
-  HANDLE TokenHandle;
-  PACCESS_TOKEN AccessToken;
-  NTSTATUS Status;
-  OBJECT_ATTRIBUTES SafeObjectAttributes;
-  POBJECT_ATTRIBUTES ObjectAttributes;
+  HANDLE hToken;
+  PTOKEN AccessToken;
   LUID TokenId;
   LUID ModifiedId;
   PVOID EndMem;
   ULONG uLength;
   ULONG i;
-
-  Status = MmCopyFromCaller(&SafeObjectAttributes,
-                           UnsafeObjectAttributes,
-                           sizeof(OBJECT_ATTRIBUTES));
-  if (!NT_SUCCESS(Status))
-    return(Status);
-
-  ObjectAttributes = &SafeObjectAttributes;
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  if(PreviousMode != KernelMode)
+  {
+    _SEH_TRY
+    {
+      ProbeForWrite(TokenHandle,
+                    sizeof(HANDLE),
+                    sizeof(ULONG));
+      ProbeForRead(AuthenticationId,
+                   sizeof(LUID),
+                   sizeof(ULONG));
+      ProbeForRead(ExpirationTime,
+                   sizeof(LARGE_INTEGER),
+                   sizeof(ULONG));
+      ProbeForRead(TokenUser,
+                   sizeof(TOKEN_USER),
+                   sizeof(ULONG));
+      ProbeForRead(TokenGroups,
+                   sizeof(TOKEN_GROUPS),
+                   sizeof(ULONG));
+      ProbeForRead(TokenPrivileges,
+                   sizeof(TOKEN_PRIVILEGES),
+                   sizeof(ULONG));
+      ProbeForRead(TokenOwner,
+                   sizeof(TOKEN_OWNER),
+                   sizeof(ULONG));
+      ProbeForRead(TokenPrimaryGroup,
+                   sizeof(TOKEN_PRIMARY_GROUP),
+                   sizeof(ULONG));
+      ProbeForRead(TokenDefaultDacl,
+                   sizeof(TOKEN_DEFAULT_DACL),
+                   sizeof(ULONG));
+      ProbeForRead(TokenSource,
+                   sizeof(TOKEN_SOURCE),
+                   sizeof(ULONG));
+    }
+    _SEH_HANDLE
+    {
+      Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+    
+    if(!NT_SUCCESS(Status))
+    {
+      return Status;
+    }
+  }
 
   Status = ZwAllocateLocallyUniqueId(&TokenId);
   if (!NT_SUCCESS(Status))
@@ -1386,12 +2066,12 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
   if (!NT_SUCCESS(Status))
     return(Status);
 
-  Status = ObCreateObject(ExGetPreviousMode(),
+  Status = ObCreateObject(PreviousMode,
                          SepTokenObjectType,
                          ObjectAttributes,
-                         ExGetPreviousMode(),
+                         PreviousMode,
                          NULL,
-                         sizeof(ACCESS_TOKEN),
+                         sizeof(TOKEN),
                          0,
                          0,
                          (PVOID*)&AccessToken);
@@ -1401,18 +2081,7 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
       return(Status);
     }
 
-  Status = ObInsertObject ((PVOID)AccessToken,
-                          NULL,
-                          DesiredAccess,
-                          0,
-                          NULL,
-                          &TokenHandle);
-  if (!NT_SUCCESS(Status))
-    {
-      DPRINT1("ObInsertObject() failed (Status %lx)\n");
-      ObDereferenceObject (AccessToken);
-      return Status;
-    }
+  AccessToken->TokenLock = &SepTokenLock;
 
   RtlCopyLuid(&AccessToken->TokenSource.SourceIdentifier,
              &TokenSource->SourceIdentifier);
@@ -1431,7 +2100,8 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
   AccessToken->Privileges        = 0;
 
   AccessToken->TokenType = TokenType;
-  AccessToken->ImpersonationLevel = ObjectAttributes->SecurityQualityOfService->ImpersonationLevel;
+  AccessToken->ImpersonationLevel = ((PSECURITY_QUALITY_OF_SERVICE)
+                                     (ObjectAttributes->SecurityQualityOfService))->ImpersonationLevel;
 
   /*
    * Normally we would just point these members into the variable information
@@ -1445,7 +2115,7 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
     uLength += RtlLengthSid(TokenGroups->Groups[i].Sid);
 
   AccessToken->UserAndGroups = 
-    (PSID_AND_ATTRIBUTES)ExAllocatePoolWithTag(NonPagedPool,
+    (PSID_AND_ATTRIBUTES)ExAllocatePoolWithTag(PagedPool,
                                               uLength,
                                               TAG('T', 'O', 'K', 'u'));
 
@@ -1481,7 +2151,7 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
     {
       uLength = TokenPrivileges->PrivilegeCount * sizeof(LUID_AND_ATTRIBUTES);
       AccessToken->Privileges =
-       (PLUID_AND_ATTRIBUTES)ExAllocatePoolWithTag(NonPagedPool,
+       (PLUID_AND_ATTRIBUTES)ExAllocatePoolWithTag(PagedPool,
                                                    uLength,
                                                    TAG('T', 'O', 'K', 'p'));
 
@@ -1498,7 +2168,7 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
   if (NT_SUCCESS(Status))
     {
       AccessToken->DefaultDacl =
-       (PACL) ExAllocatePoolWithTag(NonPagedPool,
+       (PACL) ExAllocatePoolWithTag(PagedPool,
                                     TokenDefaultDacl->DefaultDacl->AclSize,
                                     TAG('T', 'O', 'K', 'd'));
       memcpy(AccessToken->DefaultDacl,
@@ -1506,22 +2176,33 @@ NtCreateToken(OUT PHANDLE UnsafeTokenHandle,
             TokenDefaultDacl->DefaultDacl->AclSize);
     }
 
-  ObDereferenceObject(AccessToken);
-
-  if (NT_SUCCESS(Status))
+  Status = ObInsertObject ((PVOID)AccessToken,
+                          NULL,
+                          DesiredAccess,
+                          0,
+                          NULL,
+                          &hToken);
+  if (!NT_SUCCESS(Status))
     {
-      Status = MmCopyToCaller(UnsafeTokenHandle,
-                             &TokenHandle,
-                             sizeof(HANDLE));
+      DPRINT1("ObInsertObject() failed (Status %lx)\n", Status);
     }
 
-  if (!NT_SUCCESS(Status))
+  ObDereferenceObject(AccessToken);
+
+  if (NT_SUCCESS(Status))
     {
-      ZwClose(TokenHandle);
-      return(Status);
+      _SEH_TRY
+      {
+        *TokenHandle = hToken;
+      }
+      _SEH_HANDLE
+      {
+        Status = _SEH_GetExceptionCode();
+      }
+      _SEH_END;
     }
 
-  return(STATUS_SUCCESS);
+  return Status;
 }
 
 
@@ -1532,8 +2213,9 @@ NTSTATUS STDCALL
 SeQueryAuthenticationIdToken(IN PACCESS_TOKEN Token,
                             OUT PLUID LogonId)
 {
-  LogonId->LowPart = Token->AuthenticationId.LowPart;
-  LogonId->HighPart = Token->AuthenticationId.HighPart;
+  PAGED_CODE();
+  
+  *LogonId = ((PTOKEN)Token)->AuthenticationId;
 
   return STATUS_SUCCESS;
 }
@@ -1542,10 +2224,13 @@ SeQueryAuthenticationIdToken(IN PACCESS_TOKEN Token,
 /*
  * @implemented
  */
-SECURITY_IMPERSONATION_LEVEL STDCALL
+SECURITY_IMPERSONATION_LEVEL
+STDCALL
 SeTokenImpersonationLevel(IN PACCESS_TOKEN Token)
 {
-  return Token->ImpersonationLevel;
+  PAGED_CODE();
+  
+  return ((PTOKEN)Token)->ImpersonationLevel;
 }
 
 
@@ -1555,9 +2240,234 @@ SeTokenImpersonationLevel(IN PACCESS_TOKEN Token)
 TOKEN_TYPE STDCALL
 SeTokenType(IN PACCESS_TOKEN Token)
 {
-  return Token->TokenType;
+  PAGED_CODE();
+  
+  return ((PTOKEN)Token)->TokenType;
+}
+
+
+/*
+ * @unimplemented
+ */
+BOOLEAN
+STDCALL
+SeTokenIsAdmin(
+       IN PACCESS_TOKEN Token
+       )
+{
+       UNIMPLEMENTED;
+       return FALSE;
+}
+
+/*
+ * @unimplemented
+ */
+BOOLEAN
+STDCALL
+SeTokenIsRestricted(
+       IN PACCESS_TOKEN Token
+       )
+{
+       UNIMPLEMENTED;
+       return FALSE;
+}
+
+/*
+ * @unimplemented
+ */
+BOOLEAN
+STDCALL
+SeTokenIsWriteRestricted(
+       IN PACCESS_TOKEN Token
+       )
+{
+       UNIMPLEMENTED;
+       return FALSE;
 }
 
 
+/*
+ * @implemented
+ */
+NTSTATUS
+STDCALL
+NtOpenThreadTokenEx(IN HANDLE ThreadHandle,
+                    IN ACCESS_MASK DesiredAccess,
+                    IN BOOLEAN OpenAsSelf,
+                    IN ULONG HandleAttributes,
+                    OUT PHANDLE TokenHandle)
+{
+  PETHREAD Thread;
+  HANDLE hToken;
+  PTOKEN Token, NewToken, PrimaryToken;
+  BOOLEAN CopyOnOpen, EffectiveOnly;
+  SECURITY_IMPERSONATION_LEVEL ImpersonationLevel;
+  SE_IMPERSONATION_STATE ImpersonationState;
+  OBJECT_ATTRIBUTES ObjectAttributes;
+  SECURITY_DESCRIPTOR SecurityDescriptor;
+  PACL Dacl = NULL;
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status = STATUS_SUCCESS;
+  
+  PAGED_CODE();
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  if(PreviousMode != KernelMode)
+  {
+    _SEH_TRY
+    {
+      ProbeForWrite(TokenHandle,
+                    sizeof(HANDLE),
+                    sizeof(ULONG));
+    }
+    _SEH_HANDLE
+    {
+      Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+    
+    if(!NT_SUCCESS(Status))
+    {
+      return Status;
+    }
+  }
+
+  /*
+   * At first open the thread token for information access and verify
+   * that the token associated with thread is valid.
+   */
+
+  Status = ObReferenceObjectByHandle(ThreadHandle, THREAD_QUERY_INFORMATION,
+                                     PsThreadType, PreviousMode, (PVOID*)&Thread,
+                                     NULL);
+  if (!NT_SUCCESS(Status))
+    {
+      return Status;
+    }
+
+  Token = PsReferenceImpersonationToken(Thread, &CopyOnOpen, &EffectiveOnly,
+                                        &ImpersonationLevel);
+  if (Token == NULL)
+    {
+      ObfDereferenceObject(Thread);
+      return STATUS_NO_TOKEN;
+    }
+
+  ObDereferenceObject(Thread);
+
+  if (ImpersonationLevel == SecurityAnonymous)
+    {
+      ObfDereferenceObject(Token);
+      return STATUS_CANT_OPEN_ANONYMOUS;
+    }
+
+  /*
+   * Revert to self if OpenAsSelf is specified.
+   */
+
+  if (OpenAsSelf)
+    {
+      PsDisableImpersonation(PsGetCurrentThread(), &ImpersonationState);
+    }
+
+  if (CopyOnOpen)
+    {
+      Status = ObReferenceObjectByHandle(ThreadHandle, THREAD_ALL_ACCESS,
+                                         PsThreadType, PreviousMode,
+                                         (PVOID*)&Thread, NULL);
+      if (!NT_SUCCESS(Status))
+        {
+          ObfDereferenceObject(Token);
+          if (OpenAsSelf)
+            {
+              PsRestoreImpersonation(PsGetCurrentThread(), &ImpersonationState);
+            }
+          return Status;
+        }
+   
+      PrimaryToken = PsReferencePrimaryToken(Thread->ThreadsProcess);
+      Status = SepCreateImpersonationTokenDacl(Token, PrimaryToken, &Dacl);
+      ObfDereferenceObject(PrimaryToken);
+      ObfDereferenceObject(Thread);
+      if (!NT_SUCCESS(Status))
+        {
+          ObfDereferenceObject(Token);
+          if (OpenAsSelf)
+            {
+              PsRestoreImpersonation(PsGetCurrentThread(), &ImpersonationState);
+            }
+          return Status;
+        }
+      
+      RtlCreateSecurityDescriptor(&SecurityDescriptor,
+                                  SECURITY_DESCRIPTOR_REVISION);
+      RtlSetDaclSecurityDescriptor(&SecurityDescriptor, TRUE, Dacl,
+                                   FALSE);
+
+      InitializeObjectAttributes(&ObjectAttributes, NULL, HandleAttributes,
+                                 NULL, &SecurityDescriptor);
+
+      Status = SepDuplicateToken(Token, &ObjectAttributes, EffectiveOnly,
+                                 TokenImpersonation, ImpersonationLevel,
+                                 KernelMode, &NewToken);
+      ExFreePool(Dacl);
+      if (!NT_SUCCESS(Status))
+        {
+          ObfDereferenceObject(Token);
+          if (OpenAsSelf)
+            {
+              PsRestoreImpersonation(PsGetCurrentThread(), &ImpersonationState);
+            }
+          return Status;
+        }
+
+      Status = ObInsertObject(NewToken, NULL, DesiredAccess, 0, NULL,
+                              &hToken);
+
+      ObfDereferenceObject(NewToken);
+    }
+  else
+    {
+      Status = ObOpenObjectByPointer(Token, HandleAttributes,
+                                     NULL, DesiredAccess, SepTokenObjectType,
+                                     PreviousMode, &hToken);
+    }
+
+  ObfDereferenceObject(Token);
+
+  if (OpenAsSelf)
+    {
+      PsRestoreImpersonation(PsGetCurrentThread(), &ImpersonationState);
+    }
+
+  if(NT_SUCCESS(Status))
+  {
+    _SEH_TRY
+    {
+      *TokenHandle = hToken;
+    }
+    _SEH_HANDLE
+    {
+      Status = _SEH_GetExceptionCode();
+    }
+    _SEH_END;
+  }
+
+  return Status;
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS STDCALL
+NtOpenThreadToken(IN HANDLE ThreadHandle,
+                  IN ACCESS_MASK DesiredAccess,
+                  IN BOOLEAN OpenAsSelf,
+                  OUT PHANDLE TokenHandle)
+{
+  return NtOpenThreadTokenEx(ThreadHandle, DesiredAccess, OpenAsSelf, 0,
+                             TokenHandle);
+}
 
 /* EOF */