private static SafeMemoryBuffer GetTokenInformation(SafeNativeHandle hToken, NativeHelpers.TokenInformationClass tokenClass)
{
UInt32 tokenLength;
bool res = NativeMethods.GetTokenInformation(hToken, tokenClass, new SafeMemoryBuffer(IntPtr.Zero), 0, out tokenLength);
if (!res && tokenLength == 0) // res will be false due to insufficient buffer size, we ignore if we got the buffer length
{
throw new Win32Exception(String.Format("GetTokenInformation({0}) failed to get buffer length", tokenClass.ToString()));
}
SafeMemoryBuffer tokenInfo = new SafeMemoryBuffer((int)tokenLength);
if (!NativeMethods.GetTokenInformation(hToken, tokenClass, tokenInfo, tokenLength, out tokenLength))
{
throw new Win32Exception(String.Format("GetTokenInformation({0}) failed", tokenClass.ToString()));
}
return(tokenInfo);
}
private static SafeMemoryBuffer GetTokenInformation(SafeNativeHandle hToken,
NativeHelpers.TokenInformationClass infoClass)
{
UInt32 tokenLength;
bool res = NativeMethods.GetTokenInformation(hToken, infoClass, new SafeMemoryBuffer(IntPtr.Zero), 0,
out tokenLength);
int errCode = Marshal.GetLastWin32Error();
if (!res && errCode != 24 && errCode != 122) // ERROR_INSUFFICIENT_BUFFER, ERROR_BAD_LENGTH
{
throw new Win32Exception(errCode, String.Format("GetTokenInformation({0}) failed to get buffer length",
infoClass.ToString()));
}
SafeMemoryBuffer tokenInfo = new SafeMemoryBuffer((int)tokenLength);
if (!NativeMethods.GetTokenInformation(hToken, infoClass, tokenInfo, tokenLength, out tokenLength))
{
throw new Win32Exception(String.Format("GetTokenInformation({0}) failed", infoClass.ToString()));
}
return(tokenInfo);
}
public static extern bool GetTokenInformation(
SafeNativeHandle TokenHandle,
NativeHelpers.TokenInformationClass TokenInformationClass,
SafeMemoryBuffer TokenInformation,
UInt32 TokenInformationLength,
out UInt32 ReturnLength);