Package java.security.interfaces

Examples of java.security.interfaces.DSAPrivateKey

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            if (keySpec == null) {
                throw new NullPointerException(Messages
                        .getString("security.19E")); //$NON-NLS-1$
            }
            if (key instanceof DSAPrivateKey) {
                DSAPrivateKey privateKey = (DSAPrivateKey) key;

                if (keySpec.equals(DSAPrivateKeySpec.class)) {

                    x = privateKey.getX();

                    DSAParams params = privateKey.getParams();

                    p = params.getP();
                    q = params.getQ();
                    g = params.getG();
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    protected Key engineTranslateKey(Key key) throws InvalidKeyException {

        if (key != null) {
            if (key instanceof DSAPrivateKey) {

                DSAPrivateKey privateKey = (DSAPrivateKey) key;
                DSAParams params = privateKey.getParams();

                try {
                    return engineGeneratePrivate(new DSAPrivateKeySpec(
                            privateKey.getX(), params.getP(), params.getQ(),
                            params.getG()));
                } catch (InvalidKeySpecException e) {
                    // Actually this exception shouldn't be thrown
                    throw new InvalidKeyException(Messages.getString(
                            "security.1A0", e)); //$NON-NLS-1$
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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));
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            RSAPrivateCrtKey    rsK = (RSAPrivateCrtKey)keyPair.getPrivateKey().getKey();
           
            secKey = new RSASecretBCPGKey(rsK.getPrivateExponent(), rsK.getPrimeP(), rsK.getPrimeQ());
            break;
        case PGPPublicKey.DSA:
            DSAPrivateKey       dsK = (DSAPrivateKey)keyPair.getPrivateKey().getKey();
           
            secKey = new DSASecretBCPGKey(dsK.getX());
            break;
        case PGPPublicKey.ELGAMAL_ENCRYPT:
        case PGPPublicKey.ELGAMAL_GENERAL:
            ElGamalPrivateKey   esK = (ElGamalPrivateKey)keyPair.getPrivateKey().getKey();
           
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                DERSequence seq = new DERSequence(vec);
                byte[] derBytes = PKCS8Key.encode(seq);
                PKCS8Key pkcs8 = new PKCS8Key(derBytes, null);
                pkcs8DerBytes = pkcs8.getDecryptedBytes();
            } else if (key instanceof DSAPrivateKey) {
                DSAPrivateKey dsa = (DSAPrivateKey) key;
                DSAParams params = dsa.getParams();
                BigInteger g = params.getG();
                BigInteger p = params.getP();
                BigInteger q = params.getQ();
                BigInteger x = dsa.getX();
                BigInteger y = q.modPow(x, p);

                ASN1EncodableVector vec = new ASN1EncodableVector();
                vec.add(new DERInteger(BigInteger.ZERO));
                vec.add(new DERInteger(p));
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     * @return the corresponding public key
     * @throws GeneralSecurityException if it didn't work
     */
    public static PublicKey derivePublicKey(PrivateKey key) throws GeneralSecurityException {
        if (key instanceof DSAPrivateKey) {
            DSAPrivateKey dsaKey = (DSAPrivateKey) key;
            DSAParams keyParams = dsaKey.getParams();
            BigInteger g = keyParams.getG();
            BigInteger p = keyParams.getP();
            BigInteger q = keyParams.getQ();
            BigInteger x = dsaKey.getX();
            BigInteger y = q.modPow(x, p);
            DSAPublicKeySpec keySpec = new DSAPublicKeySpec(y, p, q, g);
            return KeyFactory.getInstance("DSA").generatePublic(keySpec);
        } else if (key instanceof RSAPrivateCrtKey) {
            RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key;
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        if (!(o instanceof DSAPrivateKey))
        {
            return false;
        }
       
        DSAPrivateKey other = (DSAPrivateKey)o;
       
        return this.getX().equals(other.getX())
            && this.getParams().getG().equals(other.getParams().getG())
            && this.getParams().getP().equals(other.getParams().getP())
            && this.getParams().getQ().equals(other.getParams().getQ());
    }
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        PrivateKey    key)
        throws InvalidKeyException
    {
        if (key instanceof DSAPrivateKey)
        {
            DSAPrivateKey    k = (DSAPrivateKey)key;

            return new DSAPrivateKeyParameters(k.getX(),
                new DSAParameters(k.getParams().getP(), k.getParams().getQ(), k.getParams().getG()));
        }
                       
        throw new InvalidKeyException("can't identify DSA private key.");
    }
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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));
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            RSAPrivateCrtKey    rsK = (RSAPrivateCrtKey)privKey.getKey();
           
            secKey = new RSASecretBCPGKey(rsK.getPrivateExponent(), rsK.getPrimeP(), rsK.getPrimeQ());
            break;
        case PGPPublicKey.DSA:
            DSAPrivateKey       dsK = (DSAPrivateKey)privKey.getKey();
           
            secKey = new DSASecretBCPGKey(dsK.getX());
            break;
        case PGPPublicKey.ELGAMAL_ENCRYPT:
        case PGPPublicKey.ELGAMAL_GENERAL:
            ElGamalPrivateKey   esK = (ElGamalPrivateKey)privKey.getKey();
           
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