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using System; |
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using System.Runtime.InteropServices; |
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using System.Security; |
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using System.Diagnostics; |
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|
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public class TokenAdjuster |
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{ |
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// obtained from: http://www.dotnet247.com/247reference/msgs/58/292150.aspx |
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|
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// PInvoke stuff required to set/enable security privileges |
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[DllImport("advapi32", SetLastError = true), |
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SuppressUnmanagedCodeSecurityAttribute] |
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static extern int OpenProcessToken( |
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System.IntPtr ProcessHandle, // handle to process |
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int DesiredAccess, // desired access to process |
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ref IntPtr TokenHandle // handle to open access token |
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); |
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|
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[DllImport("kernel32", SetLastError = true), |
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SuppressUnmanagedCodeSecurityAttribute] |
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static extern bool CloseHandle(IntPtr handle); |
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|
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[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true), |
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SuppressUnmanagedCodeSecurityAttribute] |
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static extern int AdjustTokenPrivileges( |
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IntPtr TokenHandle, |
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int DisableAllPrivileges, |
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IntPtr NewState, |
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int BufferLength, |
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IntPtr PreviousState, |
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ref int ReturnLength); |
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|
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[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true), |
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SuppressUnmanagedCodeSecurityAttribute] |
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static extern bool LookupPrivilegeValue( |
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string lpSystemName, |
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string lpName, |
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ref LUID lpLuid); |
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|
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[StructLayout(LayoutKind.Sequential)] |
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internal struct LUID |
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{ |
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internal int LowPart; |
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internal int HighPart; |
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} |
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|
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[StructLayout(LayoutKind.Sequential)] |
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struct LUID_AND_ATTRIBUTES |
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{ |
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LUID Luid; |
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int Attributes; |
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} |
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|
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[StructLayout(LayoutKind.Sequential)] |
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struct _PRIVILEGE_SET |
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{ |
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int PrivilegeCount; |
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int Control; |
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)] // ANYSIZE_ARRAY = 1 |
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LUID_AND_ATTRIBUTES[] Privileges; |
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} |
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|
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[StructLayout(LayoutKind.Sequential)] |
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internal struct TOKEN_PRIVILEGES |
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{ |
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internal int PrivilegeCount; |
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)] |
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internal int[] Privileges; |
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} |
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const int SE_PRIVILEGE_ENABLED = 0x00000002; |
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const int TOKEN_ADJUST_PRIVILEGES = 0X00000020; |
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const int TOKEN_QUERY = 0X00000008; |
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const int TOKEN_ALL_ACCESS = 0X001f01ff; |
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const int PROCESS_QUERY_INFORMATION = 0X00000400; |
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|
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public static bool SetPrivilege(string lpszPrivilege, bool |
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bEnablePrivilege) |
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{ |
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bool retval = false; |
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int ltkpOld = 0; |
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IntPtr hToken = IntPtr.Zero; |
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TOKEN_PRIVILEGES tkp = new TOKEN_PRIVILEGES(); |
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tkp.Privileges = new int[3]; |
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TOKEN_PRIVILEGES tkpOld = new TOKEN_PRIVILEGES(); |
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tkpOld.Privileges = new int[3]; |
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LUID tLUID = new LUID(); |
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tkp.PrivilegeCount = 1; |
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if (bEnablePrivilege) |
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tkp.Privileges[2] = SE_PRIVILEGE_ENABLED; |
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else |
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tkp.Privileges[2] = 0; |
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if (LookupPrivilegeValue(null, lpszPrivilege, ref tLUID)) |
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{ |
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Process proc = Process.GetCurrentProcess(); |
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if (proc.Handle != IntPtr.Zero) |
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{ |
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if (OpenProcessToken(proc.Handle, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, |
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ref hToken) != 0) |
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{ |
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tkp.PrivilegeCount = 1; |
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tkp.Privileges[2] = SE_PRIVILEGE_ENABLED; |
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tkp.Privileges[1] = tLUID.HighPart; |
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tkp.Privileges[0] = tLUID.LowPart; |
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const int bufLength = 256; |
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IntPtr tu = Marshal.AllocHGlobal(bufLength); |
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Marshal.StructureToPtr(tkp, tu, true); |
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if (AdjustTokenPrivileges(hToken, 0, tu, bufLength, IntPtr.Zero, ref |
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ltkpOld) != 0) |
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{ |
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// successful AdjustTokenPrivileges doesn't mean privilege could bechanged |
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if (Marshal.GetLastWin32Error() == 0) |
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{ |
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retval = true; // Token changed |
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} |
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} |
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TOKEN_PRIVILEGES tokp = (TOKEN_PRIVILEGES)Marshal.PtrToStructure(tu, |
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typeof(TOKEN_PRIVILEGES)); |
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Marshal.FreeHGlobal(tu); |
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} |
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} |
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} |
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if (hToken != IntPtr.Zero) |
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{ |
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CloseHandle(hToken); |
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} |
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return retval; |
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} |
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} |
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// End class |
