Examples with DSAParameterSpec java.security.spec.DSAParameterSpec used on opensource projects

Example 11 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project robovm by robovm.

the class RandomPrivateKeyX509ExtendedKeyManager method getPrivateKey.

@Override
public PrivateKey getPrivateKey(String alias) {
    PrivateKey originalPrivateKey = super.getPrivateKey(alias);
    if (originalPrivateKey == null) {
        return null;
    }
    PrivateKey result;
    String keyAlgorithm = originalPrivateKey.getAlgorithm();
    try {
        KeyFactory keyFactory = KeyFactory.getInstance(keyAlgorithm);
        if ("RSA".equals(keyAlgorithm)) {
            RSAPrivateKeySpec originalKeySpec = keyFactory.getKeySpec(originalPrivateKey, RSAPrivateKeySpec.class);
            int keyLengthBits = originalKeySpec.getModulus().bitLength();
            // Use a cache because RSA key generation is slow.
            String cacheKey = keyAlgorithm + "-" + keyLengthBits;
            result = cachedKeys.get(cacheKey);
            if (result == null) {
                KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(keyAlgorithm);
                keyPairGenerator.initialize(keyLengthBits);
                result = keyPairGenerator.generateKeyPair().getPrivate();
                cachedKeys.put(cacheKey, result);
            }
        } else if ("DSA".equals(keyAlgorithm)) {
            DSAPrivateKeySpec originalKeySpec = keyFactory.getKeySpec(originalPrivateKey, DSAPrivateKeySpec.class);
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(keyAlgorithm);
            keyPairGenerator.initialize(new DSAParameterSpec(originalKeySpec.getP(), originalKeySpec.getQ(), originalKeySpec.getG()));
            result = keyPairGenerator.generateKeyPair().getPrivate();
        } else {
            Assert.fail("Unsupported key algorithm: " + originalPrivateKey.getAlgorithm());
            result = null;
        }
    } catch (GeneralSecurityException e) {
        Assert.fail("Failed to generate private key: " + e);
        result = null;
    }
    return result;
}

Example 12 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project robovm by robovm.

the class JDKDSAPrivateKey method readObject.

private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
    this.x = (BigInteger) in.readObject();
    this.dsaSpec = new DSAParameterSpec((BigInteger) in.readObject(), (BigInteger) in.readObject(), (BigInteger) in.readObject());
    this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
    attrCarrier.readObject(in);
}

Example 13 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project robovm by robovm.

the class DSAPublicKeyImpl method readObject.

private void readObject(java.io.ObjectInputStream in) throws NotActiveException, IOException, ClassNotFoundException {
    in.defaultReadObject();
    params = new DSAParameterSpec(p, q, g);
}

Example 14 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project jdk8u_jdk by JetBrains.

the class DSAKeyPairGenerator method initialize.

/**
     * Initializes the DSA object using a DSA parameter object.
     *
     * @param params a fully initialized DSA parameter object.
     */
public void initialize(DSAParams params, SecureRandom random) {
    if (params == null) {
        throw new InvalidParameterException("Params must not be null");
    }
    DSAParameterSpec spec = new DSAParameterSpec(params.getP(), params.getQ(), params.getG());
    initialize0(spec, random);
}

Example 15 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project jdk8u_jdk by JetBrains.

the class DSAParameterGenerator method engineGenerateParameters.

/**
     * Generates the parameters.
     *
     * @return the new AlgorithmParameters object
     */
protected AlgorithmParameters engineGenerateParameters() {
    AlgorithmParameters algParams = null;
    try {
        if (this.random == null) {
            this.random = new SecureRandom();
        }
        if (valueL == -1) {
            try {
                engineInit(DEFAULTS, this.random);
            } catch (InvalidAlgorithmParameterException iape) {
            // should never happen
            }
        }
        BigInteger[] pAndQ = generatePandQ(this.random, valueL, valueN, seedLen);
        BigInteger paramP = pAndQ[0];
        BigInteger paramQ = pAndQ[1];
        BigInteger paramG = generateG(paramP, paramQ);
        DSAParameterSpec dsaParamSpec = new DSAParameterSpec(paramP, paramQ, paramG);
        algParams = AlgorithmParameters.getInstance("DSA", "SUN");
        algParams.init(dsaParamSpec);
    } catch (InvalidParameterSpecException e) {
        // this should never happen
        throw new RuntimeException(e.getMessage());
    } catch (NoSuchAlgorithmException e) {
        // this should never happen, because we provide it
        throw new RuntimeException(e.getMessage());
    } catch (NoSuchProviderException e) {
        // this should never happen, because we provide it
        throw new RuntimeException(e.getMessage());
    }
    return algParams;
}