public static void InvSubBytes(byte[] state)
{
CheckState(state);
SBox sBox = SBox.GetInstance();
for (int i = 0; i < state.Length; i++)
{
state[i] = sBox.InvSubstitute(state[i]);
}
}
public static uint SubWord(uint word)
{
byte[] bytes = BitConverter.GetBytes(word);
SBox sBox = SBox.GetInstance();
for (int i = 0; i < sizeof(int); i++)
{
bytes[i] = sBox.Substitute(bytes[i]);
}
return(BitConverter.ToUInt32(bytes));
}
public static SBox GetInstance()
{
if (instance == null)
{
lock (syncRoot)
{
if (instance == null)
{
instance = new SBox();
}
}
}
return(instance);
}
