Example usage for org.bouncycastle.crypto.generators DSAParametersGenerator generateParameters

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.generators DSAParametersGenerator generateParameters.

Prototype

public DSAParameters generateParameters() 

Source Link

Document

which generates the p and g values from the given parameters, returning the DSAParameters object.

Usage

From source file:com.geoxp.oss.CryptoHelperTest.java

License:Apache License

@Test
public void testSSHSignatureBlobSign_DSA() throws Exception {
    DSAKeyPairGenerator dsakpg = new DSAKeyPairGenerator();
    DSAParametersGenerator dpg = new DSAParametersGenerator();
    dpg.init(1024, 8, new SecureRandom());
    DSAParameters dsaparams = dpg.generateParameters();
    DSAKeyGenerationParameters params = new DSAKeyGenerationParameters(new SecureRandom(), dsaparams);
    dsakpg.init(params);//from  w w  w .  j a v a 2s  .c  om

    AsymmetricCipherKeyPair kp = dsakpg.generateKeyPair();

    DSAPrivateKeyParameters privParams = (DSAPrivateKeyParameters) kp.getPrivate();
    DSAPublicKeyParameters pubParams = (DSAPublicKeyParameters) kp.getPublic();

    KeySpec ks = new DSAPrivateKeySpec(privParams.getX(), privParams.getParameters().getP(),
            privParams.getParameters().getQ(), privParams.getParameters().getG());
    PrivateKey priv = KeyFactory.getInstance("DSA").generatePrivate(ks);

    ks = new DSAPublicKeySpec(pubParams.getY(), pubParams.getParameters().getP(),
            pubParams.getParameters().getQ(), pubParams.getParameters().getG());
    PublicKey pub = KeyFactory.getInstance("DSA").generatePublic(ks);

    byte[] data = PLAINTEXT.getBytes();
    byte[] sig = CryptoHelper.sshSignatureBlobSign(data, priv);

    Assert.assertTrue(CryptoHelper.sshSignatureBlobVerify(data, sig, pub));
}

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From source file:dorkbox.util.crypto.CryptoDSA.java

License:Apache License

/**
 * Generates the DSA key (using RSA and SHA1)
 * <p/>/*  ww  w. ja  v a2 s  .  c om*/
 * Note: this is here just for keeping track of how this is done. This should NOT be used, and instead use ECC crypto.
 */
public static AsymmetricCipherKeyPair generateKeyPair(SecureRandom secureRandom, int keyLength) {
    DSAKeyPairGenerator keyGen = new DSAKeyPairGenerator();

    DSAParametersGenerator dsaParametersGenerator = new DSAParametersGenerator();
    dsaParametersGenerator.init(keyLength, 20, secureRandom);
    DSAParameters generateParameters = dsaParametersGenerator.generateParameters();

    DSAKeyGenerationParameters params = new DSAKeyGenerationParameters(secureRandom, generateParameters);
    keyGen.init(params);
    return keyGen.generateKeyPair();
}

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From source file:org.xipki.commons.security.util.DSAParameterCache.java

License:Open Source License

public static DSAParameterSpec getNewDSAParameterSpec(final int plength, final int qlength,
        final SecureRandom random) {
    final int certainty = 80;
    SecureRandom tmpRandom = (random == null) ? new SecureRandom() : random;
    DSAParametersGenerator paramGen = new DSAParametersGenerator(new SHA512Digest());
    DSAParameterGenerationParameters genParams = new DSAParameterGenerationParameters(plength, qlength,
            certainty, tmpRandom);//w w w . j a va  2 s  . c om
    paramGen.init(genParams);
    DSAParameters dsaParams = paramGen.generateParameters();
    return new DSAParameterSpec(dsaParams.getP(), dsaParams.getQ(), dsaParams.getG());
}

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From source file:org.xipki.security.KeyUtil.java

License:Open Source License

public static KeyPair generateDSAKeypair(final int pLength, final int qLength, final int certainty)
        throws Exception {
    DSAParametersGenerator paramGen = new DSAParametersGenerator(new SHA512Digest());
    DSAParameterGenerationParameters genParams = new DSAParameterGenerationParameters(pLength, qLength,
            certainty, new SecureRandom());
    paramGen.init(genParams);//from w w  w  .  j av a2  s. c  o m
    DSAParameters dsaParams = paramGen.generateParameters();

    KeyPairGenerator kpGen = KeyPairGenerator.getInstance("DSA", "BC");
    DSAParameterSpec dsaParamSpec = new DSAParameterSpec(dsaParams.getP(), dsaParams.getQ(), dsaParams.getG());
    kpGen.initialize(dsaParamSpec, new SecureRandom());
    return kpGen.generateKeyPair();
}

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From source file:org.xipki.security.p11.iaik.IaikP11Slot.java

License:Open Source License

private PrivateKeyAndPKInfo generateDSAKeyPair(final Session session, final int pLength, final int qLength,
        final byte[] id, final String label) throws Exception {
    DSAParametersGenerator paramGen = new DSAParametersGenerator(new SHA512Digest());
    DSAParameterGenerationParameters genParams = new DSAParameterGenerationParameters(pLength, qLength, 80,
            new SecureRandom());
    paramGen.init(genParams);/*from   w w w  . ja  v  a2 s .  c om*/
    DSAParameters dsaParams = paramGen.generateParameters();

    DSAPrivateKey privateKey = new DSAPrivateKey();
    DSAPublicKey publicKey = new DSAPublicKey();

    setKeyAttributes(id, label, PKCS11Constants.CKK_DSA, privateKey, publicKey);

    publicKey.getPrime().setByteArrayValue(dsaParams.getP().toByteArray());
    publicKey.getSubprime().setByteArrayValue(dsaParams.getQ().toByteArray());
    publicKey.getBase().setByteArrayValue(dsaParams.getG().toByteArray());

    KeyPair kp = session.generateKeyPair(Mechanism.get(PKCS11Constants.CKM_DSA_KEY_PAIR_GEN), publicKey,
            privateKey);

    publicKey = (DSAPublicKey) kp.getPublicKey();
    BigInteger value = new BigInteger(1, publicKey.getValue().getByteArrayValue());

    ASN1EncodableVector v = new ASN1EncodableVector();
    v.add(new ASN1Integer(dsaParams.getP()));
    v.add(new ASN1Integer(dsaParams.getQ()));
    v.add(new ASN1Integer(dsaParams.getG()));
    ASN1Sequence dssParams = new DERSequence(v);

    SubjectPublicKeyInfo pkInfo = new SubjectPublicKeyInfo(
            new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa, dssParams), new ASN1Integer(value));

    return new PrivateKeyAndPKInfo((DSAPrivateKey) kp.getPrivateKey(), pkInfo);
}

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From source file:org.xwiki.crypto.internal.asymmetric.generator.BcDSAKeyParameterGenerator.java

License:Open Source License

/**
 * Generate DSA parameters./*w  ww  .j a  v  a 2 s. c  o  m*/
 *
 * Shared with the key generator to optimize key generation.
 *
 * @param params the parameters generation parameters.
 * @return shared DSA parameters for key generation.
 */
org.bouncycastle.crypto.params.DSAParameters getDsaParameters(SecureRandom random,
        DSAKeyParametersGenerationParameters params) {
    DSAParametersGenerator paramGen = getGenerator(params.getHashHint());

    if (params.use186r3()) {
        DSAParameterGenerationParameters p = new DSAParameterGenerationParameters(params.getPrimePsize() * 8,
                params.getPrimeQsize() * 8, params.getCertainty(), random, getUsageIndex(params.getUsage()));
        paramGen.init(p);
    } else {
        paramGen.init(params.getStrength() * 8, params.getCertainty(), random);
    }

    return paramGen.generateParameters();
}

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