Examples with ElGamalParametersGenerator com.github.zhenwei.core.crypto.generators.ElGamalParametersGenerator used on opensource projects

Example 1 with ElGamalParametersGenerator

use of com.github.zhenwei.core.crypto.generators.ElGamalParametersGenerator in project LinLong-Java by zhenwei1108.

the class KeyPairGeneratorSpi method generateKeyPair.

public KeyPair generateKeyPair() {
    if (!initialised) {
        DHParameterSpec dhParams = WeGooProvider.CONFIGURATION.getDHDefaultParameters(strength);
        if (dhParams != null) {
            param = new ElGamalKeyGenerationParameters(random, new ElGamalParameters(dhParams.getP(), dhParams.getG(), dhParams.getL()));
        } else {
            ElGamalParametersGenerator pGen = new ElGamalParametersGenerator();
            pGen.init(strength, certainty, random);
            param = new ElGamalKeyGenerationParameters(random, pGen.generateParameters());
        }
        engine.init(param);
        initialised = true;
    }
    AsymmetricCipherKeyPair pair = engine.generateKeyPair();
    ElGamalPublicKeyParameters pub = (ElGamalPublicKeyParameters) pair.getPublic();
    ElGamalPrivateKeyParameters priv = (ElGamalPrivateKeyParameters) pair.getPrivate();
    return new KeyPair(new BCElGamalPublicKey(pub), new BCElGamalPrivateKey(priv));
}

Example 2 with ElGamalParametersGenerator

use of com.github.zhenwei.core.crypto.generators.ElGamalParametersGenerator in project LinLong-Java by zhenwei1108.

the class AlgorithmParameterGeneratorSpi method engineGenerateParameters.

protected AlgorithmParameters engineGenerateParameters() {
    ElGamalParametersGenerator pGen = new ElGamalParametersGenerator();
    if (random != null) {
        pGen.init(strength, 20, random);
    } else {
        pGen.init(strength, 20, CryptoServicesRegistrar.getSecureRandom());
    }
    ElGamalParameters p = pGen.generateParameters();
    AlgorithmParameters params;
    try {
        params = createParametersInstance("ElGamal");
        params.init(new DHParameterSpec(p.getP(), p.getG(), l));
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage());
    }
    return params;
}