private void FinalRound()
{
_stateMatrix = AESFunction.SubBytes(_stateMatrix);
_stateMatrix = AESFunction.ShiftRows(_stateMatrix);
byte[][] roundKey = _key.NextSubKey();
_stateMatrix = AESFunction.AddRoundKey(_stateMatrix, roundKey);
}
private void ReverseFinalRound()
{
byte[][] roundKey = _key.PreviousSubKey();
_stateMatrix = AESFunction.AddRoundKey(_stateMatrix, roundKey);
_stateMatrix = AESFunction.ReverseShiftRows(_stateMatrix);
_stateMatrix = AESFunction.ReverseSubBytes(_stateMatrix);
}
public void ReverseShiftRows_ShiftsRows_Shifted()
{
byte[][] array =
{
new byte[] { 0xd4, 0xe0, 0xb8, 0x1e },
new byte[] { 0xbf, 0xb4, 0x41, 0x27 },
new byte[] { 0x5d, 0x52, 0x11, 0x98 },
new byte[] { 0x30, 0xae, 0xf1, 0xe5 }
};
byte[][] expected =
{
new byte[] { 0xd4, 0xe0, 0xb8, 0x1e },
new byte[] { 0x27, 0xbf, 0xb4, 0x41 },
new byte[] { 0x11, 0x98, 0x5d, 0x52 },
new byte[] { 0xae, 0xf1, 0xe5, 0x30 }
};
byte[][] result = AESFunction.ReverseShiftRows(array);
for (int i = 0; i < result.Length; i++)
{
for (int j = 0; j < result[i].Length; j++)
{
Assert.AreEqual(expected[j][i], result[j][i]);
}
}
}
public void SubButes_GoesOverSubBytesStep_Replaced()
{
byte[][] array =
{
new byte[] { 0x19, 0xa0, 0x9a, 0xe9 },
new byte[] { 0x3d, 0xf4, 0xc6, 0xf8 },
new byte[] { 0xe3, 0xe2, 0x8d, 0x48 },
new byte[] { 0xbe, 0x2b, 0x2a, 0x08 }
};
byte[][] expected =
{
new byte[] { 0xd4, 0xe0, 0xb8, 0x1e },
new byte[] { 0x27, 0xbf, 0xb4, 0x41 },
new byte[] { 0x11, 0x98, 0x5d, 0x52 },
new byte[] { 0xae, 0xf1, 0xe5, 0x30 }
};
byte[][] result = AESFunction.SubBytes(array);
for (int i = 0; i < result.Length; i++)
{
for (int j = 0; j < result[i].Length; j++)
{
Assert.AreEqual(expected[j][i], result[j][i]);
}
}
}
public void ReverseMixColumns_GoesOverMixColumnsStep_Executed()
{
byte[][] array =
{
new byte[] { 0x04, 0xe0, 0x48, 0x28 },
new byte[] { 0x66, 0xcb, 0xf8, 0x06 },
new byte[] { 0x81, 0x19, 0xd3, 0x26 },
new byte[] { 0xe5, 0x9a, 0x7a, 0x4c }
};
byte[][] expected =
{
new byte[] { 0xd4, 0xe0, 0xb8, 0x1e },
new byte[] { 0xbf, 0xb4, 0x41, 0x27 },
new byte[] { 0x5d, 0x52, 0x11, 0x98 },
new byte[] { 0x30, 0xae, 0xf1, 0xe5 }
};
byte[][] result = AESFunction.ReverseMixColumns(array);
for (int i = 0; i < result.Length; i++)
{
for (int j = 0; j < result[i].Length; j++)
{
Assert.AreEqual(expected[j][i], result[j][i]);
}
}
}
public void AddRoundKey_GoesOverAddRoundKeyStep_Executed()
{
byte[][] array =
{
new byte[] { 0x04, 0xe0, 0x48, 0x28 },
new byte[] { 0x66, 0xcb, 0xf8, 0x06 },
new byte[] { 0x81, 0x19, 0xd3, 0x26 },
new byte[] { 0xe5, 0x9a, 0x7a, 0x4c }
};
byte[][] roundKey =
{
new byte[] { 0xa0, 0x88, 0x23, 0x2a },
new byte[] { 0xfa, 0x54, 0xa3, 0x6c },
new byte[] { 0xfe, 0x2c, 0x39, 0x76 },
new byte[] { 0x17, 0xb1, 0x39, 0x05 }
};
byte[][] expected =
{
new byte[] { 0xa4, 0x68, 0x6b, 0x02 },
new byte[] { 0x9c, 0x9f, 0x5b, 0x6a },
new byte[] { 0x7f, 0x35, 0xea, 0x50 },
new byte[] { 0xf2, 0x2b, 0x43, 0x49 }
};
byte[][] result = AESFunction.AddRoundKey(array, roundKey);
for (int i = 0; i < result.Length; i++)
{
for (int j = 0; j < result[i].Length; j++)
{
Assert.AreEqual(expected[j][i], result[j][i]);
}
}
}
private void RoundZero()
{
byte[][] roundKey = _key.NextSubKey();
_stateMatrix = AESFunction.AddRoundKey(_stateMatrix, roundKey);
}
private void ReverseRoundZero()
{
byte[][] roundKey = _key.PreviousSubKey();
_stateMatrix = AESFunction.AddRoundKey(_stateMatrix, roundKey);
}
