private OcbBlockCipher InitCipher(bool forEncryption, AeadParameters parameters)
{
OcbBlockCipher c = new OcbBlockCipher(new AesFastEngine(), new AesFastEngine());
c.Init(forEncryption, parameters);
return(c);
}
private void DoTestExceptions()
{
IAeadBlockCipher ocb = CreateOcbCipher();
try
{
ocb = new OcbBlockCipher(new DesEngine(), new DesEngine());
Fail("incorrect block size not picked up");
}
catch (ArgumentException)
{
// expected
}
try
{
ocb.Init(false, new KeyParameter(new byte[16]));
Fail("illegal argument not picked up");
}
catch (ArgumentException)
{
// expected
}
// TODO
//AEADTestUtil.testReset(this, createOCBCipher(), createOCBCipher(), new AEADParameters(new KeyParameter(new byte[16]), 128, new byte[15]));
//AEADTestUtil.testTampering(this, ocb, new AEADParameters(new KeyParameter(new byte[16]), 128, new byte[15]));
}
private void RunLongerTestCase(int aesKeySize, int tagLen, byte[] expectedOutput)
{
KeyParameter key = new KeyParameter(new byte[aesKeySize / 8]);
byte[] N = new byte[12];
IAeadBlockCipher c1 = new OcbBlockCipher(new AesFastEngine(), new AesFastEngine());
c1.Init(true, new AeadParameters(key, tagLen, N));
IAeadBlockCipher c2 = new OcbBlockCipher(new AesFastEngine(), new AesFastEngine());
long total = 0;
byte[] S = new byte[128];
for (int i = 0; i < 128; ++i)
{
N[11] = (byte)i;
c2.Init(true, new AeadParameters(key, tagLen, N));
total += UpdateCiphers(c1, c2, S, i, true, true);
total += UpdateCiphers(c1, c2, S, i, false, true);
total += UpdateCiphers(c1, c2, S, i, true, false);
}
long expectedTotal = 16256 + (48 * tagLen);
if (total != expectedTotal)
{
Fail("test generated the wrong amount of input: " + total);
}
byte[] output = new byte[c1.GetOutputSize(0)];
c1.DoFinal(output, 0);
if (!AreEqual(expectedOutput, output))
{
Fail("incorrect encrypt in long-form test");
}
}