Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Principal / Win32.cs / 1 / Win32.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Security.Permissions; using System.Text; namespace System.Security.Principal { using BOOL = System.Int32; using DWORD = System.UInt32; using System.Globalization; [Flags] internal enum PolicyRights { POLICY_VIEW_LOCAL_INFORMATION = 0x00000001, POLICY_VIEW_AUDIT_INFORMATION = 0x00000002, POLICY_GET_PRIVATE_INFORMATION = 0x00000004, POLICY_TRUST_ADMIN = 0x00000008, POLICY_CREATE_ACCOUNT = 0x00000010, POLICY_CREATE_SECRET = 0x00000020, POLICY_CREATE_PRIVILEGE = 0x00000040, POLICY_SET_DEFAULT_QUOTA_LIMITS = 0x00000080, POLICY_SET_AUDIT_REQUIREMENTS = 0x00000100, POLICY_AUDIT_LOG_ADMIN = 0x00000200, POLICY_SERVER_ADMIN = 0x00000400, POLICY_LOOKUP_NAMES = 0x00000800, POLICY_NOTIFICATION = 0x00001000, } internal sealed class Win32 { internal const BOOL FALSE = 0; internal const BOOL TRUE = 1; private static bool _LsaApisSupported; private static bool _LsaLookupNames2Supported; private static bool _ConvertStringSidToSidSupported; private static bool _WellKnownSidApisSupported; static Win32() { Win32Native.OSVERSIONINFO osvi = new Win32Native.OSVERSIONINFO(); bool r = Win32Native.GetVersionEx(osvi); if ( !r ) { BCLDebug.Assert( r, "OSVersion native call failed." ); throw new SystemException( Environment.GetResourceString( "InvalidOperation_GetVersion" )); } if ( osvi.PlatformId == Win32Native.VER_PLATFORM_WIN32_NT && osvi.MajorVersion >= 5 ) // Windows 2000/XP/W2K3 and above { // // ConvertStringSidToSid and lsa apis supported only on Windows 2000 and greater // _ConvertStringSidToSidSupported = true; _LsaApisSupported = true; if (osvi.MajorVersion > 5 || osvi.MinorVersion > 0 ) // Windows XP/2003 and above { // // LsaLookupNames2 supported only on XP and Windows 2003 and above // _LsaLookupNames2Supported = true; _WellKnownSidApisSupported = true; } else { // Win2000 _LsaLookupNames2Supported = false; // // WellKnownSid apis are only supported on Windows 2000 SP3 and above // (so we need sp info) // Win32Native.OSVERSIONINFOEX osviex = new Win32Native.OSVERSIONINFOEX(); r = Win32Native.GetVersionEx(osviex); if ( !r ) { BCLDebug.Assert( r, "OSVersion native call failed"); throw new SystemException( Environment.GetResourceString( "InvalidOperation_GetVersion" )); } if (osviex.ServicePackMajor < 3) { _WellKnownSidApisSupported = false; } else { _WellKnownSidApisSupported = true; } } } else { // // Win9x // _LsaApisSupported = false; _LsaLookupNames2Supported = false; _ConvertStringSidToSidSupported = false; _WellKnownSidApisSupported = false; } } private Win32() {} // to avoid generation of default constructor internal static bool SddlConversionSupported { get { return _ConvertStringSidToSidSupported; } } internal static bool LsaApisSupported { get { return _LsaApisSupported; } } internal static bool LsaLookupNames2Supported { get { return _LsaLookupNames2Supported; } } internal static bool WellKnownSidApisSupported { get { return _WellKnownSidApisSupported; } } // // Wrapper around advapi32.LsaOpenPolicy // internal static SafeLsaPolicyHandle LsaOpenPolicy( string systemName, PolicyRights rights ) { // // Check if the api is supported // if (!LsaApisSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_Win9x" )); } uint ReturnCode; SafeLsaPolicyHandle Result; Win32Native.LSA_OBJECT_ATTRIBUTES Loa; Loa.Length = Marshal.SizeOf( typeof( Win32Native.LSA_OBJECT_ATTRIBUTES )); Loa.RootDirectory = IntPtr.Zero; Loa.ObjectName = IntPtr.Zero; Loa.Attributes = 0; Loa.SecurityDescriptor = IntPtr.Zero; Loa.SecurityQualityOfService = IntPtr.Zero; if ( 0 == ( ReturnCode = Win32Native.LsaOpenPolicy( systemName, ref Loa, ( int )rights, out Result ))) { return Result; } else if ( ReturnCode == Win32Native.STATUS_ACCESS_DENIED ) { throw new UnauthorizedAccessException(); } else if ( ReturnCode == Win32Native.STATUS_INSUFFICIENT_RESOURCES || ReturnCode == Win32Native.STATUS_NO_MEMORY ) { throw new OutOfMemoryException(); } else { int win32ErrorCode = Win32Native.LsaNtStatusToWinError(unchecked((int) ReturnCode)); BCLDebug.Assert( false, string.Format( CultureInfo.InvariantCulture, "Win32Native.LsaOpenPolicy returned unexpected error {0}", win32ErrorCode)); throw new SystemException(Win32Native.GetMessage(win32ErrorCode)); } } internal static byte[] ConvertIntPtrSidToByteArraySid( IntPtr binaryForm ) { byte[] ResultSid; // // Verify the revision (just sanity, should never fail to be 1) // byte Revision = Marshal.ReadByte( binaryForm, 0 ); if ( Revision != SecurityIdentifier.Revision ) { throw new ArgumentException(Environment.GetResourceString( "IdentityReference_InvalidSidRevision" ), "binaryForm"); } // // Need the subauthority count in order to figure out how many bytes to read // byte SubAuthorityCount = Marshal.ReadByte( binaryForm, 1 ); if ( SubAuthorityCount < 0 || SubAuthorityCount > SecurityIdentifier.MaxSubAuthorities ) { throw new ArgumentException(Environment.GetResourceString( "IdentityReference_InvalidNumberOfSubauthorities", SecurityIdentifier.MaxSubAuthorities), "binaryForm"); } // // Compute the size of the binary form of this SID and allocate the memory // int BinaryLength = 1 + 1 + 6 + SubAuthorityCount * 4; ResultSid = new byte[ BinaryLength ]; // // Extract the data from the returned pointer // Marshal.Copy( binaryForm, ResultSid, 0, BinaryLength ); return ResultSid; } // // Wrapper around advapi32.ConvertStringSidToSidW // internal static int CreateSidFromString( string stringSid, out byte[] resultSid ) { int ErrorCode; IntPtr ByteArray = IntPtr.Zero; if (!SddlConversionSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_Win9x" )); } try { if ( TRUE != Win32Native.ConvertStringSidToSid( stringSid, out ByteArray )) { ErrorCode = Marshal.GetLastWin32Error(); goto Error; } resultSid = ConvertIntPtrSidToByteArraySid( ByteArray ); } finally { // // Now is a good time to get rid of the returned pointer // Win32Native.LocalFree( ByteArray ); } // // Now invoke the SecurityIdentifier factory method to create the result // return Win32Native.ERROR_SUCCESS; Error: resultSid = null; return ErrorCode; } // // Wrapper around advapi32.CreateWellKnownSid // internal static int CreateWellKnownSid( WellKnownSidType sidType, SecurityIdentifier domainSid, out byte[] resultSid ) { // // Check if the api is supported // if (!WellKnownSidApisSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresW2kSP3" )); } // // Passing an array as big as it can ever be is a small price to pay for // not having to P/Invoke twice (once to get the buffer, once to get the data) // uint length = ( uint )SecurityIdentifier.MaxBinaryLength; resultSid = new byte[ length ]; if ( FALSE != Win32Native.CreateWellKnownSid(( int )sidType, domainSid == null ? null : domainSid.BinaryForm, resultSid, ref length )) { return Win32Native.ERROR_SUCCESS; } else { resultSid = null; return Marshal.GetLastWin32Error(); } } // // Wrapper around advapi32.EqualDomainSid // internal static bool IsEqualDomainSid( SecurityIdentifier sid1, SecurityIdentifier sid2 ) { // // Check if the api is supported // if (!WellKnownSidApisSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresW2kSP3" )); } if ( sid1 == null || sid2 == null ) { return false; } else { bool result; byte[] BinaryForm1 = new Byte[sid1.BinaryLength]; sid1.GetBinaryForm( BinaryForm1, 0 ); byte[] BinaryForm2 = new Byte[sid2.BinaryLength]; sid2.GetBinaryForm( BinaryForm2, 0 ); return ( Win32Native.IsEqualDomainSid( BinaryForm1, BinaryForm2, out result ) == FALSE ? false : result ); } } // // Wrapper around avdapi32.GetWindowsAccountDomainSid // internal static int GetWindowsAccountDomainSid( SecurityIdentifier sid, out SecurityIdentifier resultSid ) { // // Check if the api is supported // if (!WellKnownSidApisSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresW2kSP3" )); } // // Passing an array as big as it can ever be is a small price to pay for // not having to P/Invoke twice (once to get the buffer, once to get the data) // byte[] BinaryForm = new Byte[sid.BinaryLength]; sid.GetBinaryForm( BinaryForm, 0 ); uint sidLength = ( uint )SecurityIdentifier.MaxBinaryLength; byte[] resultSidBinary = new byte[ sidLength ]; if ( FALSE != Win32Native.GetWindowsAccountDomainSid( BinaryForm, resultSidBinary, ref sidLength )) { resultSid = new SecurityIdentifier( resultSidBinary, 0 ); return Win32Native.ERROR_SUCCESS; } else { resultSid = null; return Marshal.GetLastWin32Error(); } } // // Wrapper around advapi32.IsWellKnownSid // internal static bool IsWellKnownSid( SecurityIdentifier sid, WellKnownSidType type ) { // // Check if the api is supported // if (!WellKnownSidApisSupported) { throw new PlatformNotSupportedException( Environment.GetResourceString( "PlatformNotSupported_RequiresW2kSP3" )); } byte[] BinaryForm = new byte[sid.BinaryLength]; sid.GetBinaryForm( BinaryForm, 0 ); if ( FALSE == Win32Native.IsWellKnownSid( BinaryForm, ( int )type )) { return false; } else { return true; } } // When the CLR is hosted, the host gets to implement these calls, // otherwise, we call down into the Win32 APIs. [MethodImplAttribute(MethodImplOptions.InternalCall)] internal static extern int ImpersonateLoggedOnUser (SafeTokenHandle hToken); [MethodImplAttribute(MethodImplOptions.InternalCall)] internal static extern int OpenThreadToken (TokenAccessLevels dwDesiredAccess, WinSecurityContext OpenAs, out SafeTokenHandle phThreadToken); [MethodImplAttribute(MethodImplOptions.InternalCall)] internal static extern int RevertToSelf (); [MethodImplAttribute(MethodImplOptions.InternalCall)] internal static extern int SetThreadToken(SafeTokenHandle hToken); } }
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