Examples of java.security.spec.DSAPrivateKeySpec

java.security.spec.DSAPrivateKeySpec
This class specifies a DSA private key with its associated parameters. @author Jan Luehe @version 1.19, 11/17/05 @see java.security.Key @see java.security.KeyFactory @see KeySpec @see DSAPublicKeySpec @see PKCS8EncodedKeySpec @since 1.2

    public static PrivateKey getPrivateKey(String algo) 
        throws InvalidKeySpecException, NoSuchAlgorithmException {
        KeyFactory kf = KeyFactory.getInstance(algo);
        KeySpec kspec;
        if (algo.equalsIgnoreCase("DSA")) {
            kspec = new DSAPrivateKeySpec
                (new BigInteger(DSA_X), new BigInteger(DSA_P), 
                 new BigInteger(DSA_Q), new BigInteger(DSA_G));
        } else if (algo.equalsIgnoreCase("RSA")) {
            kspec = new RSAPrivateKeySpec
                (new BigInteger(RSA_MOD), new BigInteger(RSA_PRIV));

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        BigQ = new BigInteger(1, massage(Base64.decode(new String(q))));
        BigG = new BigInteger(1, massage(Base64.decode(new String(g))));


        try {
            KeyFactory dsaKeyFactory = KeyFactory.getInstance("dsa");
            DSAPrivateKeySpec kspec = new DSAPrivateKeySpec(BigY, BigP, BigQ, BigG);
            return (DSAPrivateKey) dsaKeyFactory.generatePrivate(kspec);
        } catch (Exception e) {
            throw new ProcessingException(e);
        }
    }

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