/**
* this test is can take quiet a while
*/
private void doTestGeneration(
int size)
{
DHParametersGenerator pGen = new DHParametersGenerator();
pGen.Init(size, 10, new SecureRandom());
DHParameters dhParams = pGen.GenerateParameters();
if (dhParams.L != 0)
{
Fail("DHParametersGenerator failed to set J to 0 in generated DHParameters");
}
DHKeyGenerationParameters dhkgParams = new DHKeyGenerationParameters(new SecureRandom(), dhParams);
DHBasicKeyPairGenerator kpGen = new DHBasicKeyPairGenerator();
kpGen.Init(dhkgParams);
//
// generate first pair
//
AsymmetricCipherKeyPair pair = kpGen.GenerateKeyPair();
DHPublicKeyParameters pu1 = (DHPublicKeyParameters)pair.Public;
DHPrivateKeyParameters pv1 = (DHPrivateKeyParameters)pair.Private;
//
// generate second pair
//
dhkgParams = new DHKeyGenerationParameters(new SecureRandom(), pu1.Parameters);
kpGen.Init(dhkgParams);
pair = kpGen.GenerateKeyPair();
DHPublicKeyParameters pu2 = (DHPublicKeyParameters)pair.Public;
DHPrivateKeyParameters pv2 = (DHPrivateKeyParameters)pair.Private;
//
// two way
//
DHBasicAgreement e1 = new DHBasicAgreement();
DHBasicAgreement e2 = new DHBasicAgreement();
e1.Init(new ParametersWithRandom(pv1, new SecureRandom()));
e2.Init(new ParametersWithRandom(pv2, new SecureRandom()));
BigInteger k1 = e1.CalculateAgreement(pu2);
BigInteger k2 = e2.CalculateAgreement(pu1);
if (!k1.Equals(k2))
{
Fail("basic with " + size + " bit 2-way test failed");
}
}
private void testWithRandomParams(int bits)
{
DHParametersGenerator paramGen = new DHParametersGenerator();
paramGen.Init(bits, 25, random);
DHParameters parameters = paramGen.GenerateParameters();
BigInteger g = parameters.G;
BigInteger p = parameters.P;
testMutualVerification(p, g);
}
public static DHParameters GenerateParameters()
{
var generator = new DHParametersGenerator();
generator.Init(256, 30, new SecureRandom());
return generator.GenerateParameters();
}
public static DHParameters GenerateParameters(int keyLength, int probability)
{
DHParametersGenerator generator = new DHParametersGenerator();
generator.Init(keyLength, probability, new SecureRandom());
return generator.GenerateParameters();
}
private void testWithRandomParams(int bits)
{
DHParametersGenerator paramGen = new DHParametersGenerator();
paramGen.Init(bits, 25, random);
DHParameters parameters = paramGen.GenerateParameters();
testMutualVerification(new Srp6GroupParameters(parameters.P, parameters.G));
}
private static DHParameters GetDiffieHellmanParameters(int bitLength, int probability)
{
DHParametersGenerator generator = new DHParametersGenerator();
generator.Init(bitLength, probability, new SecureRandom());
return generator.GenerateParameters();
}