private void doTestExceptions()
{
IMac mac = MacUtilities.GetMac("HmacSHA1");
byte [] b = {(byte)1, (byte)2, (byte)3, (byte)4, (byte)5};
// KeyParameter sks = new KeyParameter(b); //, "HmacSHA1");
// RC5ParameterSpec algPS = new RC5ParameterSpec(100, 100, 100);
RC5Parameters rc5Parameters = new RC5Parameters(b, 100);
try
{
// mac.Init(sks, algPS);
mac.Init(rc5Parameters);
}
// catch (InvalidAlgorithmParameterException e)
catch (Exception)
{
// ignore okay
}
try
{
mac.Init(null); //, null);
}
// catch (InvalidKeyException)
// {
// // ignore okay
// }
// catch (InvalidAlgorithmParameterException e)
catch (Exception)
{
// ignore okay
}
// try
// {
// mac.Init(null);
// }
// catch (InvalidKeyException)
// {
// // ignore okay
// }
}
private void doTest(
string algorithm,
byte[] input,
byte[] output)
{
KeyParameter key = null;
CipherKeyGenerator keyGen;
SecureRandom rand;
IBufferedCipher inCipher = null, outCipher = null;
byte[] iv = null;
CipherStream cIn, cOut;
MemoryStream bIn, bOut;
rand = new FixedSecureRandom();
string[] parts = algorithm.ToUpper(CultureInfo.InvariantCulture).Split('/');
string baseAlgorithm = parts[0];
string mode = parts.Length > 1 ? parts[1] : null;
#if !INCLUDE_IDEA
if (baseAlgorithm.Equals("IDEA"))
{
return;
}
#endif
try
{
keyGen = GeneratorUtilities.GetKeyGenerator(baseAlgorithm);
// TODO Add Algorithm property to CipherKeyGenerator?
// if (!keyGen.getAlgorithm().Equals(baseAlgorithm))
// {
// Fail("wrong key generator returned!");
// }
// TODO Add new Init method to CipherKeyGenerator?
// keyGen.Init(rand);
keyGen.Init(new KeyGenerationParameters(rand, keyGen.DefaultStrength));
byte[] keyBytes = keyGen.GenerateKey();
if (algorithm.StartsWith("RC5"))
{
key = new RC5Parameters(keyBytes, rc5Rounds);
}
else
{
key = ParameterUtilities.CreateKeyParameter(baseAlgorithm, keyBytes);
}
inCipher = CipherUtilities.GetCipher(algorithm);
outCipher = CipherUtilities.GetCipher(algorithm);
if (!inCipher.AlgorithmName.ToUpper(CultureInfo.InvariantCulture).StartsWith(baseAlgorithm))
{
Fail("wrong cipher returned!");
}
ICipherParameters parameters = key;
int ivLength = GetIVLength(algorithm);
if (ivLength > 0)
{
if (baseAlgorithm == "RC2")
{
iv = rc2IV;
}
else if (baseAlgorithm == "RC5")
{
iv = rc5IV;
}
else if (baseAlgorithm == "RC5-64")
{
iv = rc564IV;
}
else
{
// NB: rand always generates same values each test run
iv = rand.GenerateSeed(ivLength);
}
parameters = new ParametersWithIV(key, iv);
}
// NB: 'rand' still needed e.g. for some paddings
parameters = new ParametersWithRandom(parameters, rand);
outCipher.Init(true, parameters);
}
catch (Exception e)
{
Fail("" + algorithm + " failed initialisation - " + e.ToString(), e);
}
//
// grab the iv if there is one
//
try
{
// The Java version set this implicitly, but we set it explicity
//byte[] iv = outCipher.getIV();
if (iv != null)
{
// TODO Examine short IV handling for these FIPS-compliant modes in Java build
if (mode.StartsWith("CFB")
|| mode.StartsWith("GOFB")
|| mode.StartsWith("OFB")
|| mode.StartsWith("OPENPGPCFB"))
{
// These modes automatically pad out the IV if it is short
}
else
{
try
{
byte[] nIv = new byte[iv.Length- 1];
inCipher.Init(false, new ParametersWithIV(key, nIv));
Fail("failed to pick up short IV");
}
//catch (InvalidAlgorithmParameterException e)
catch (ArgumentException)
{
// ignore - this is what we want...
}
}
//IvParameterSpec spec = new IvParameterSpec(iv);
inCipher.Init(false, new ParametersWithIV(key, iv));
}
else
{
inCipher.Init(false, key);
}
}
catch (Exception e)
{
Fail("" + algorithm + " failed initialisation - " + e.ToString());
}
//
// encryption pass
//
bOut = new MemoryStream();
cOut = new CipherStream(bOut, null, outCipher);
try
{
for (int i = 0; i != input.Length/ 2; i++)
{
cOut.WriteByte(input[i]);
}
cOut.Write(input, input.Length/ 2, input.Length- input.Length/ 2);
cOut.Close();
}
catch (IOException e)
{
Fail("" + algorithm + " failed encryption - " + e.ToString());
}
byte[] bytes = bOut.ToArray();
if (!AreEqual(bytes, output))
{
Fail("" + algorithm + " failed encryption - expected "
+ Hex.ToHexString(output) + " got "
+ Hex.ToHexString(bytes));
}
//
// decryption pass
//
bIn = new MemoryStream(bytes, false);
cIn = new CipherStream(bIn, inCipher, null);
try
{
BinaryReader dIn = new BinaryReader(cIn);
bytes = new byte[input.Length];
for (int i = 0; i != input.Length/ 2; i++)
{
bytes[i] = dIn.ReadByte();
}
int remaining = bytes.Length - input.Length / 2;
byte[] extra = dIn.ReadBytes(remaining);
if (extra.Length < remaining)
throw new EndOfStreamException();
extra.CopyTo(bytes, input.Length / 2);
}
catch (Exception e)
{
Fail("" + algorithm + " failed decryption - " + e.ToString());
}
if (!AreEqual(bytes, input))
{
Fail("" + algorithm + " failed decryption - expected "
+ Hex.ToHexString(input) + " got "
+ Hex.ToHexString(bytes));
}
}
