private void calculateSubkey(byte[] key, byte[] K1, byte[] K2)
{
byte[] zero = new byte[0x10];
byte[] L = new byte[0x10];
ToolsImpl.aesecbEncrypt(key, zero, 0, L, 0, zero.Length);
BigInteger aux = new BigInteger(ConversionUtils.reverseByteWithSizeFIX(L));
if ((L[0] & 0x80) != 0)
{
//Case MSB is set
aux = (aux << 1) ^ (new BigInteger(0x87));
}
else
{
aux = aux << 1;
}
byte[] aux1 = ConversionUtils.reverseByteWithSizeFIX(aux.ToByteArray());
if (aux1.Length >= 0x10)
{
ConversionUtils.arraycopy(aux1, aux1.Length - 0x10, K1, 0, 0x10);
}
else
{
ConversionUtils.arraycopy(zero, 0, K1, 0, zero.Length);
ConversionUtils.arraycopy(aux1, 0, K1, 0x10 - aux1.Length, aux1.Length);
}
aux = new BigInteger(ConversionUtils.reverseByteWithSizeFIX(K1));
if ((K1[0] & 0x80) != 0)
{
aux = (aux << 1) ^ (new BigInteger(0x87));
}
else
{
aux = aux << 1;
}
aux1 = ConversionUtils.reverseByteWithSizeFIX(aux.ToByteArray());
if (aux1.Length >= 0x10)
{
ConversionUtils.arraycopy(aux1, aux1.Length - 0x10, K2, 0, 0x10);
}
else
{
ConversionUtils.arraycopy(zero, 0, K2, 0, zero.Length);
ConversionUtils.arraycopy(aux1, 0, K2, 0x10 - aux1.Length, aux1.Length);
}
}