Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Security / AccessControl / Win32.cs / 1 / Win32.cs
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using System;
using System.Collections;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using System.Security.Principal;
namespace System.Security.AccessControl
{
internal static class Win32
{
internal const System.Int32 TRUE = 1;
private static bool _isConversionSupported;
static Win32()
{
//
// SDDL-to-binary conversion only supported on W2K, XP and above
//
Win32Native.OSVERSIONINFO osvi = new Win32Native.OSVERSIONINFO();
if ( !Win32Native.GetVersionEx( osvi ))
{
BCLDebug.Assert( false, "OSVersion native call failed" );
throw new SystemException( Environment.GetResourceString( "InvalidOperation_GetVersion" ));
}
if ( osvi.PlatformId == Win32Native.VER_PLATFORM_WIN32_NT &&
osvi.MajorVersion >= 5 )
{
_isConversionSupported = true;
}
else
{
_isConversionSupported = false;
}
}
internal static bool IsSddlConversionSupported()
{
return _isConversionSupported;
}
internal static bool IsLsaPolicySupported()
{
return _isConversionSupported;
}
//
// Wrapper around advapi32.ConvertSecurityDescriptorToStringSecurityDescriptorW
//
[SecurityPermission( SecurityAction.Assert, UnmanagedCode=true )]
internal static int ConvertSdToSddl(
byte[] binaryForm,
int requestedRevision,
SecurityInfos si,
out string resultSddl )
{
int errorCode;
IntPtr ByteArray;
uint ByteArraySize = 0;
if ( !IsSddlConversionSupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_Win9x" ));
}
if ( TRUE != Win32Native.ConvertSdToStringSd( binaryForm, ( uint )requestedRevision, ( uint )si, out ByteArray, ref ByteArraySize ))
{
errorCode = Marshal.GetLastWin32Error();
goto Error;
}
//
// Extract data from the returned pointer
//
resultSddl = Marshal.PtrToStringUni( ByteArray );
//
// Now is a good time to get rid of the returned pointer
//
Win32Native.LocalFree( ByteArray );
return 0;
Error:
resultSddl = null;
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
//
// Wrapper around advapi32.GetSecurityInfo
//
internal static int GetSecurityInfo(
ResourceType resourceType,
string name,
SafeHandle handle,
AccessControlSections accessControlSections,
out RawSecurityDescriptor resultSd
)
{
resultSd = null;
if (!IsLsaPolicySupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresNT" ));
}
//
// Demand unmanaged code permission
// The integrator layer is free to assert this permission
// and, in turn, demand another permission of its caller
//
new SecurityPermission( SecurityPermissionFlag.UnmanagedCode ).Demand();
int errorCode;
IntPtr SidOwner, SidGroup, Dacl, Sacl, ByteArray;
SecurityInfos SecurityInfos = 0;
Privilege privilege = null;
if (( accessControlSections & AccessControlSections.Owner ) != 0 )
{
SecurityInfos |= SecurityInfos.Owner;
}
if (( accessControlSections & AccessControlSections.Group ) != 0 )
{
SecurityInfos |= SecurityInfos.Group;
}
if (( accessControlSections & AccessControlSections.Access ) != 0 )
{
SecurityInfos |= SecurityInfos.DiscretionaryAcl;
}
if (( accessControlSections & AccessControlSections.Audit ) != 0 )
{
SecurityInfos |= SecurityInfos.SystemAcl;
privilege = new Privilege( Privilege.Security );
}
// Ensure that the finally block will execute
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if ( privilege != null )
{
try
{
privilege.Enable();
}
catch (PrivilegeNotHeldException)
{
// we will ignore this exception and press on just in case this is a remote resource
}
}
if ( name != null )
{
errorCode = ( int )Win32Native.GetSecurityInfoByName( name, ( uint )resourceType, ( uint )SecurityInfos, out SidOwner, out SidGroup, out Dacl, out Sacl, out ByteArray );
}
else if (handle != null)
{
if (handle.IsInvalid)
{
throw new ArgumentException(
Environment.GetResourceString( "Argument_InvalidSafeHandle" ),
"handle" );
}
else
{
errorCode = ( int )Win32Native.GetSecurityInfoByHandle( handle, ( uint )resourceType, ( uint )SecurityInfos, out SidOwner, out SidGroup, out Dacl, out Sacl, out ByteArray );
}
}
else
{
// both are null, shouldn't happen
throw new SystemException();
}
if ( errorCode == Win32Native.ERROR_SUCCESS && IntPtr.Zero.Equals(ByteArray) )
{
//
// This means that the object doesn't have a security descriptor. And thus we throw
// a specific exception for the caller to catch and handle properly.
//
throw new InvalidOperationException(Environment.GetResourceString( "InvalidOperation_NoSecurityDescriptor" ));
}
else if (errorCode == Win32Native.ERROR_NOT_ALL_ASSIGNED ||
errorCode == Win32Native.ERROR_PRIVILEGE_NOT_HELD)
{
throw new PrivilegeNotHeldException( Privilege.Security );
}
else if ( errorCode == Win32Native.ERROR_ACCESS_DENIED ||
errorCode == Win32Native.ERROR_CANT_OPEN_ANONYMOUS )
{
throw new UnauthorizedAccessException();
}
if ( errorCode != Win32Native.ERROR_SUCCESS )
{
goto Error;
}
}
catch
{
// protection against exception filter-based luring attacks
if ( privilege != null )
{
privilege.Revert();
}
throw;
}
finally
{
if ( privilege != null )
{
privilege.Revert();
}
}
//
// Extract data from the returned pointer
//
uint Length = Win32Native.GetSecurityDescriptorLength( ByteArray );
byte[] BinaryForm = new byte[Length];
Marshal.Copy( ByteArray, BinaryForm, 0, ( int )Length );
Win32Native.LocalFree( ByteArray );
resultSd = new RawSecurityDescriptor( BinaryForm, 0 );
return Win32Native.ERROR_SUCCESS;
Error:
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
//
// Wrapper around advapi32.SetNamedSecurityInfoW and advapi32.SetSecurityInfo
//
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static int SetSecurityInfo(
ResourceType type,
string name,
SafeHandle handle,
SecurityInfos securityInformation,
SecurityIdentifier owner,
SecurityIdentifier group,
GenericAcl sacl,
GenericAcl dacl )
{
if (!IsLsaPolicySupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresNT" ));
}
int errorCode;
int Length;
byte[] OwnerBinary = null, GroupBinary = null, SaclBinary = null, DaclBinary = null;
Privilege securityPrivilege = null;
//
// Demand unmanaged code permission
// The integrator layer is free to assert this permission
// and, in turn, demand another permission of its caller
//
new SecurityPermission( SecurityPermissionFlag.UnmanagedCode ).Demand();
if ( owner != null )
{
Length = owner.BinaryLength;
OwnerBinary = new byte[Length];
owner.GetBinaryForm( OwnerBinary, 0 );
}
if ( group != null )
{
Length = group.BinaryLength;
GroupBinary = new byte[Length];
group.GetBinaryForm( GroupBinary, 0 );
}
if ( dacl != null )
{
Length = dacl.BinaryLength;
DaclBinary = new byte[Length];
dacl.GetBinaryForm( DaclBinary, 0 );
}
if ( sacl != null )
{
Length = sacl.BinaryLength;
SaclBinary = new byte[Length];
sacl.GetBinaryForm( SaclBinary, 0 );
}
if ( ( securityInformation & SecurityInfos.SystemAcl ) != 0 )
{
//
// Enable security privilege if trying to set a SACL.
// Note: even setting it by handle needs this privilege enabled!
//
securityPrivilege = new Privilege( Privilege.Security );
}
// Ensure that the finally block will execute
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if ( securityPrivilege != null )
{
try
{
securityPrivilege.Enable();
}
catch (PrivilegeNotHeldException)
{
// we will ignore this exception and press on just in case this is a remote resource
}
}
if ( name != null )
{
errorCode = ( int )Win32Native.SetSecurityInfoByName( name, ( uint )type, ( uint )securityInformation, OwnerBinary, GroupBinary, DaclBinary, SaclBinary );
}
else if (handle != null)
{
if (handle.IsInvalid)
{
throw new ArgumentException(
Environment.GetResourceString( "Argument_InvalidSafeHandle" ),
"handle" );
}
else
{
errorCode = ( int )Win32Native.SetSecurityInfoByHandle( handle, ( uint )type, ( uint )securityInformation, OwnerBinary, GroupBinary, DaclBinary, SaclBinary );
}
}
else
{
// both are null, shouldn't happen
BCLDebug.Assert( false, "Internal error: both name and handle are null" );
throw new InvalidProgramException();
}
if (errorCode == Win32Native.ERROR_NOT_ALL_ASSIGNED ||
errorCode == Win32Native.ERROR_PRIVILEGE_NOT_HELD)
{
throw new PrivilegeNotHeldException( Privilege.Security );
}
else if ( errorCode == Win32Native.ERROR_ACCESS_DENIED ||
errorCode == Win32Native.ERROR_CANT_OPEN_ANONYMOUS )
{
throw new UnauthorizedAccessException();
}
else if ( errorCode != Win32Native.ERROR_SUCCESS )
{
goto Error;
}
}
catch
{
// protection against exception filter-based luring attacks
if ( securityPrivilege != null )
{
securityPrivilege.Revert();
}
throw;
}
finally
{
if ( securityPrivilege != null )
{
securityPrivilege.Revert();
}
}
return 0;
Error:
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using System;
using System.Collections;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using System.Security.Principal;
namespace System.Security.AccessControl
{
internal static class Win32
{
internal const System.Int32 TRUE = 1;
private static bool _isConversionSupported;
static Win32()
{
//
// SDDL-to-binary conversion only supported on W2K, XP and above
//
Win32Native.OSVERSIONINFO osvi = new Win32Native.OSVERSIONINFO();
if ( !Win32Native.GetVersionEx( osvi ))
{
BCLDebug.Assert( false, "OSVersion native call failed" );
throw new SystemException( Environment.GetResourceString( "InvalidOperation_GetVersion" ));
}
if ( osvi.PlatformId == Win32Native.VER_PLATFORM_WIN32_NT &&
osvi.MajorVersion >= 5 )
{
_isConversionSupported = true;
}
else
{
_isConversionSupported = false;
}
}
internal static bool IsSddlConversionSupported()
{
return _isConversionSupported;
}
internal static bool IsLsaPolicySupported()
{
return _isConversionSupported;
}
//
// Wrapper around advapi32.ConvertSecurityDescriptorToStringSecurityDescriptorW
//
[SecurityPermission( SecurityAction.Assert, UnmanagedCode=true )]
internal static int ConvertSdToSddl(
byte[] binaryForm,
int requestedRevision,
SecurityInfos si,
out string resultSddl )
{
int errorCode;
IntPtr ByteArray;
uint ByteArraySize = 0;
if ( !IsSddlConversionSupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_Win9x" ));
}
if ( TRUE != Win32Native.ConvertSdToStringSd( binaryForm, ( uint )requestedRevision, ( uint )si, out ByteArray, ref ByteArraySize ))
{
errorCode = Marshal.GetLastWin32Error();
goto Error;
}
//
// Extract data from the returned pointer
//
resultSddl = Marshal.PtrToStringUni( ByteArray );
//
// Now is a good time to get rid of the returned pointer
//
Win32Native.LocalFree( ByteArray );
return 0;
Error:
resultSddl = null;
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
//
// Wrapper around advapi32.GetSecurityInfo
//
internal static int GetSecurityInfo(
ResourceType resourceType,
string name,
SafeHandle handle,
AccessControlSections accessControlSections,
out RawSecurityDescriptor resultSd
)
{
resultSd = null;
if (!IsLsaPolicySupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresNT" ));
}
//
// Demand unmanaged code permission
// The integrator layer is free to assert this permission
// and, in turn, demand another permission of its caller
//
new SecurityPermission( SecurityPermissionFlag.UnmanagedCode ).Demand();
int errorCode;
IntPtr SidOwner, SidGroup, Dacl, Sacl, ByteArray;
SecurityInfos SecurityInfos = 0;
Privilege privilege = null;
if (( accessControlSections & AccessControlSections.Owner ) != 0 )
{
SecurityInfos |= SecurityInfos.Owner;
}
if (( accessControlSections & AccessControlSections.Group ) != 0 )
{
SecurityInfos |= SecurityInfos.Group;
}
if (( accessControlSections & AccessControlSections.Access ) != 0 )
{
SecurityInfos |= SecurityInfos.DiscretionaryAcl;
}
if (( accessControlSections & AccessControlSections.Audit ) != 0 )
{
SecurityInfos |= SecurityInfos.SystemAcl;
privilege = new Privilege( Privilege.Security );
}
// Ensure that the finally block will execute
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if ( privilege != null )
{
try
{
privilege.Enable();
}
catch (PrivilegeNotHeldException)
{
// we will ignore this exception and press on just in case this is a remote resource
}
}
if ( name != null )
{
errorCode = ( int )Win32Native.GetSecurityInfoByName( name, ( uint )resourceType, ( uint )SecurityInfos, out SidOwner, out SidGroup, out Dacl, out Sacl, out ByteArray );
}
else if (handle != null)
{
if (handle.IsInvalid)
{
throw new ArgumentException(
Environment.GetResourceString( "Argument_InvalidSafeHandle" ),
"handle" );
}
else
{
errorCode = ( int )Win32Native.GetSecurityInfoByHandle( handle, ( uint )resourceType, ( uint )SecurityInfos, out SidOwner, out SidGroup, out Dacl, out Sacl, out ByteArray );
}
}
else
{
// both are null, shouldn't happen
throw new SystemException();
}
if ( errorCode == Win32Native.ERROR_SUCCESS && IntPtr.Zero.Equals(ByteArray) )
{
//
// This means that the object doesn't have a security descriptor. And thus we throw
// a specific exception for the caller to catch and handle properly.
//
throw new InvalidOperationException(Environment.GetResourceString( "InvalidOperation_NoSecurityDescriptor" ));
}
else if (errorCode == Win32Native.ERROR_NOT_ALL_ASSIGNED ||
errorCode == Win32Native.ERROR_PRIVILEGE_NOT_HELD)
{
throw new PrivilegeNotHeldException( Privilege.Security );
}
else if ( errorCode == Win32Native.ERROR_ACCESS_DENIED ||
errorCode == Win32Native.ERROR_CANT_OPEN_ANONYMOUS )
{
throw new UnauthorizedAccessException();
}
if ( errorCode != Win32Native.ERROR_SUCCESS )
{
goto Error;
}
}
catch
{
// protection against exception filter-based luring attacks
if ( privilege != null )
{
privilege.Revert();
}
throw;
}
finally
{
if ( privilege != null )
{
privilege.Revert();
}
}
//
// Extract data from the returned pointer
//
uint Length = Win32Native.GetSecurityDescriptorLength( ByteArray );
byte[] BinaryForm = new byte[Length];
Marshal.Copy( ByteArray, BinaryForm, 0, ( int )Length );
Win32Native.LocalFree( ByteArray );
resultSd = new RawSecurityDescriptor( BinaryForm, 0 );
return Win32Native.ERROR_SUCCESS;
Error:
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
//
// Wrapper around advapi32.SetNamedSecurityInfoW and advapi32.SetSecurityInfo
//
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static int SetSecurityInfo(
ResourceType type,
string name,
SafeHandle handle,
SecurityInfos securityInformation,
SecurityIdentifier owner,
SecurityIdentifier group,
GenericAcl sacl,
GenericAcl dacl )
{
if (!IsLsaPolicySupported())
{
throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresNT" ));
}
int errorCode;
int Length;
byte[] OwnerBinary = null, GroupBinary = null, SaclBinary = null, DaclBinary = null;
Privilege securityPrivilege = null;
//
// Demand unmanaged code permission
// The integrator layer is free to assert this permission
// and, in turn, demand another permission of its caller
//
new SecurityPermission( SecurityPermissionFlag.UnmanagedCode ).Demand();
if ( owner != null )
{
Length = owner.BinaryLength;
OwnerBinary = new byte[Length];
owner.GetBinaryForm( OwnerBinary, 0 );
}
if ( group != null )
{
Length = group.BinaryLength;
GroupBinary = new byte[Length];
group.GetBinaryForm( GroupBinary, 0 );
}
if ( dacl != null )
{
Length = dacl.BinaryLength;
DaclBinary = new byte[Length];
dacl.GetBinaryForm( DaclBinary, 0 );
}
if ( sacl != null )
{
Length = sacl.BinaryLength;
SaclBinary = new byte[Length];
sacl.GetBinaryForm( SaclBinary, 0 );
}
if ( ( securityInformation & SecurityInfos.SystemAcl ) != 0 )
{
//
// Enable security privilege if trying to set a SACL.
// Note: even setting it by handle needs this privilege enabled!
//
securityPrivilege = new Privilege( Privilege.Security );
}
// Ensure that the finally block will execute
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if ( securityPrivilege != null )
{
try
{
securityPrivilege.Enable();
}
catch (PrivilegeNotHeldException)
{
// we will ignore this exception and press on just in case this is a remote resource
}
}
if ( name != null )
{
errorCode = ( int )Win32Native.SetSecurityInfoByName( name, ( uint )type, ( uint )securityInformation, OwnerBinary, GroupBinary, DaclBinary, SaclBinary );
}
else if (handle != null)
{
if (handle.IsInvalid)
{
throw new ArgumentException(
Environment.GetResourceString( "Argument_InvalidSafeHandle" ),
"handle" );
}
else
{
errorCode = ( int )Win32Native.SetSecurityInfoByHandle( handle, ( uint )type, ( uint )securityInformation, OwnerBinary, GroupBinary, DaclBinary, SaclBinary );
}
}
else
{
// both are null, shouldn't happen
BCLDebug.Assert( false, "Internal error: both name and handle are null" );
throw new InvalidProgramException();
}
if (errorCode == Win32Native.ERROR_NOT_ALL_ASSIGNED ||
errorCode == Win32Native.ERROR_PRIVILEGE_NOT_HELD)
{
throw new PrivilegeNotHeldException( Privilege.Security );
}
else if ( errorCode == Win32Native.ERROR_ACCESS_DENIED ||
errorCode == Win32Native.ERROR_CANT_OPEN_ANONYMOUS )
{
throw new UnauthorizedAccessException();
}
else if ( errorCode != Win32Native.ERROR_SUCCESS )
{
goto Error;
}
}
catch
{
// protection against exception filter-based luring attacks
if ( securityPrivilege != null )
{
securityPrivilege.Revert();
}
throw;
}
finally
{
if ( securityPrivilege != null )
{
securityPrivilege.Revert();
}
}
return 0;
Error:
if ( errorCode == Win32Native.ERROR_NOT_ENOUGH_MEMORY )
{
throw new OutOfMemoryException();
}
return errorCode;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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