private void Stream_Closing(object sender, EventArgs e)
{
if (_pMode != CryptoStreamMode.Write)
{
throw new InvalidOperationException();
}
CloseNotifyStream closeNotifyStream = (CloseNotifyStream)sender;
int num1 = checked ((int)(_pPosition % _pTransform.OutputBlockSize));
if (num1 == 0)
{
num1 = 16;
}
byte[] buffer = new byte[checked (num1 - 1 + 1)];
closeNotifyStream.Write(buffer, 0, buffer.Length);
_pSha.TransformFinalBlock(new byte[0], 0, 0);
string s = "";
int num2 = 0;
int num3 = checked (_pSha.Hash.Length - 1);
int index = num2;
while (index <= num3)
{
s += _pSha.Hash[index].ToString("X2");
checked { ++index; }
}
byte[] bytes = Encoding.UTF8.GetBytes(s);
if (bytes.Length != 64)
{
throw new IOException();
}
closeNotifyStream.Write(bytes, 0, bytes.Length);
}
