private void AdvanceEncryptIV()
{
mEncryptCipher.ProcessBlock(new byte[16], 0, mEncryptIV, 0);
mEncryptCipher.Init(false, new ParametersWithIV(new KeyParameter(mKey), mEncryptIV));
mEncryptIVIndex = 0;
}
public virtual ITestResult Perform()
{
KeyParameter key = new KeyParameter(Hex.Decode("0011223344556677"));
byte[] input = Hex.Decode("4e6f7720");
byte[] out1 = new byte[4];
byte[] out2 = new byte[4];
IBlockCipher ofb = new OfbBlockCipher(new DesEngine(), 32);
ofb.Init(true, new ParametersWithIV(key, Hex.Decode("1122334455667788")));
ofb.ProcessBlock(input, 0, out1, 0);
ofb.Init(false, new ParametersWithIV(key, Hex.Decode("1122334455667788")));
ofb.ProcessBlock(out1, 0, out2, 0);
if (!Arrays.AreEqual(out2, input))
{
return(new SimpleTestResult(false, Name + ": test 1 - in != out"));
}
ofb.Init(true, new ParametersWithIV(key, Hex.Decode("11223344")));
ofb.ProcessBlock(input, 0, out1, 0);
ofb.Init(false, new ParametersWithIV(key, Hex.Decode("0000000011223344")));
ofb.ProcessBlock(out1, 0, out2, 0);
if (!Arrays.AreEqual(out2, input))
{
return(new SimpleTestResult(false, Name + ": test 2 - in != out"));
}
IBlockCipher cfb = new CfbBlockCipher(new DesEngine(), 32);
cfb.Init(true, new ParametersWithIV(key, Hex.Decode("1122334455667788")));
cfb.ProcessBlock(input, 0, out1, 0);
cfb.Init(false, new ParametersWithIV(key, Hex.Decode("1122334455667788")));
cfb.ProcessBlock(out1, 0, out2, 0);
if (!Arrays.AreEqual(out2, input))
{
return(new SimpleTestResult(false, Name + ": test 3 - in != out"));
}
cfb.Init(true, new ParametersWithIV(key, Hex.Decode("11223344")));
cfb.ProcessBlock(input, 0, out1, 0);
cfb.Init(false, new ParametersWithIV(key, Hex.Decode("0000000011223344")));
cfb.ProcessBlock(out1, 0, out2, 0);
if (!Arrays.AreEqual(out2, input))
{
return(new SimpleTestResult(false, Name + ": test 4 - in != out"));
}
return(new SimpleTestResult(true, Name + ": Okay"));
}