Package java.security.interfaces

Examples of java.security.interfaces.DSAParams

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    private void checkPublicIntegers(DSAPublicKey pk) {

        DSAParams params = pk.getParams();

        assertEquals("failure for 'pk.getY().compareTo(publicY)'", 0, pk.getY()
                .compareTo(publicY));

        assertEquals("failure for 'params.getP().compareTo(publicP)'", 0,
                params.getP().compareTo(publicP));
        assertEquals("failure for 'params.getQ().compareTo(publicQ)'", 0,
                params.getQ().compareTo(publicQ));
        assertEquals("failure for 'params.getG().compareTo(publicG)'", 0,
                params.getG().compareTo(publicG));
    }
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    }


    private void checkPrivateIntegers(DSAPrivateKey pk) {

        DSAParams params = pk.getParams();

        assertEquals("failure for 'pk.getX().compareTo(privateX)'", 0, pk
                .getX().compareTo(privateX));

        assertEquals("failure for 'params.getP().compareTo(privateP)'", 0,
                params.getP().compareTo(privateP));
        assertEquals("failure for 'params.getQ().compareTo(privateQ)'", 0,
                params.getQ().compareTo(privateQ));
        assertEquals("failure for 'params.getG().compareTo(privateG)'", 0,
                params.getG().compareTo(privateG));
    }
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        // create DSAParams
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DSA");
        keyPairGenerator.initialize(1024);
        DSAPublicKey key = (DSAPublicKey) keyPairGenerator.genKeyPair()
                .getPublic();
        DSAParams params = key.getParams();

        KeyPairGenerator keyPair = KeyPairGenerator.getInstance("DSA");
        keyPair.initialize(new DSAParameterSpec(params.getP(), params.getQ(),
                params.getG()), new SecureRandom());
    }
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    protected static boolean areKeyEquals(PublicKey k1, PublicKey k2) {
        if (k1 instanceof DSAPublicKey && k2 instanceof DSAPublicKey) {
            DSAPublicKey d1 = (DSAPublicKey) k1;
            DSAPublicKey d2 = (DSAPublicKey) k2;
            DSAParams p1 = d1.getParams();
            DSAParams p2 = d2.getParams();
            return d1.getY().equals(d2.getY())
                        && p1.getG().equals(p2.getG())
                        && p1.getP().equals(p2.getP())
                        && p1.getQ().equals(p2.getQ());
        } else if (k1 instanceof RSAPublicKey && k2 instanceof RSAPublicKey) {
            RSAPublicKey r1 = (RSAPublicKey) k1;
            RSAPublicKey r2 = (RSAPublicKey) k2;
            return r1.getModulus().equals(r2.getModulus())
                        && r1.getPublicExponent().equals(r2.getPublicExponent());
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     */
    public static PublicKey derivePublicKey(PrivateKey key) throws KeyException {
        KeyFactory factory;
        if (key instanceof DSAPrivateKey) {
            DSAPrivateKey dsaKey = (DSAPrivateKey) key;
            DSAParams keyParams = dsaKey.getParams();
            BigInteger y = keyParams.getQ().modPow(dsaKey.getX(), keyParams.getP());
            DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, keyParams.getP(), keyParams.getQ(), keyParams.getG());

            try {
                factory = KeyFactory.getInstance("DSA");
                return factory.generatePublic(pubKeySpec);
            } catch (GeneralSecurityException e) {
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        BigInteger gComponent = keyDescriptor.getG().getValueBigInt();
        BigInteger pComponent = keyDescriptor.getP().getValueBigInt();
        BigInteger qComponent = keyDescriptor.getQ().getValueBigInt();

        DSAParams  dsaParams = new DSAParameterSpec(pComponent, qComponent, gComponent);
        return getDSAKey(keyDescriptor, dsaParams);
    }
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* @see org.jclouds.ssh.SshKeys
*/
public class DSAKeys {

   public static String encodeAsOpenSSH(DSAPublicKey key) {
      DSAParams params = key.getParams();
      byte[] keyBlob = keyBlob(params.getP(), params.getQ(), params.getG(), key.getY());
      return "ssh-dss " + base64().encode(keyBlob);
   }
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        else if (obj instanceof DSAPrivateKey)
        {
            type = "DSA PRIVATE KEY";

            DSAPrivateKey       k = (DSAPrivateKey)obj;
            DSAParams           p = k.getParams();
            ASN1EncodableVector v = new ASN1EncodableVector();

            v.add(new DERInteger(0));
            v.add(new DERInteger(p.getP()));
            v.add(new DERInteger(p.getQ()));
            v.add(new DERInteger(p.getG()));

            BigInteger x = k.getX();
            BigInteger y = p.getG().modPow(x, p.getP());

            v.add(new DERInteger(y));
            v.add(new DERInteger(x));

            keyData = new DERSequence(v).getEncoded();
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     */
    public static PublicKey derivePublicKey(PrivateKey key) throws KeyException {
        KeyFactory factory;
        if (key instanceof DSAPrivateKey) {
            DSAPrivateKey dsaKey = (DSAPrivateKey) key;
            DSAParams keyParams = dsaKey.getParams();
            BigInteger y = keyParams.getQ().modPow(dsaKey.getX(), keyParams.getP());
            DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, keyParams.getP(), keyParams.getQ(), keyParams.getG());

            try {
                factory = KeyFactory.getInstance("DSA");
                return factory.generatePublic(pubKeySpec);
            } catch (GeneralSecurityException e) {
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        BigInteger gComponent = keyDescriptor.getG().getValueBigInt();
        BigInteger pComponent = keyDescriptor.getP().getValueBigInt();
        BigInteger qComponent = keyDescriptor.getQ().getValueBigInt();

        DSAParams  dsaParams = new DSAParameterSpec(pComponent, qComponent, gComponent);
        return getDSAKey(keyDescriptor, dsaParams);
    }
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