Examples of DSAParams

java.security.interfaces.DSAParams
Interface to a DSA-specific set of key parameters, which defines a DSA key family. DSA (Digital Signature Algorithm) is defined in NIST's FIPS-186. @see DSAKey @see java.security.Key @see java.security.Signature @version 1.21 05/11/17 @author Benjamin Renaud @author Josh Bloch

Examples of java.security.interfaces.DSAParams

        private KeyFactory dsakf;


        DSA(PublicKey key) throws KeyException {
            super(key);
            DSAPublicKey dkey = (DSAPublicKey) key;
            DSAParams params = dkey.getParams();
            p = new DOMCryptoBinary(params.getP());
            q = new DOMCryptoBinary(params.getQ());
            g = new DOMCryptoBinary(params.getG());
            y = new DOMCryptoBinary(dkey.getY());
        }

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Examples of java.security.interfaces.DSAParams

    @Override
    public byte[] getPublicKeyBlob() {
        DSAPublicKey publicKey = (DSAPublicKey) keyPair.getPublic();
        byte[] sshDss = ALGORITHM_TYPE.getBytes();


        DSAParams dsaParams = publicKey.getParams();
        byte[] pArray = dsaParams.getP().toByteArray();
        byte[] qArray = dsaParams.getQ().toByteArray();
        byte[] gArray = dsaParams.getG().toByteArray();
        byte[] yArray = publicKey.getY().toByteArray();


        byte[] result = new byte[sshDss.length + 4 + pArray.length + 4 + qArray.length + 4 + gArray.length + 4 + yArray.length + 4];
        int index = 0;

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Examples of java.security.interfaces.DSAParams

        private KeyFactory dsakf;


        DSA(PublicKey key) throws KeyException {
            super(key);
            DSAPublicKey dkey = (DSAPublicKey) key;
            DSAParams params = dkey.getParams();
            p = new DOMCryptoBinary(params.getP());
            q = new DOMCryptoBinary(params.getQ());
            g = new DOMCryptoBinary(params.getG());
            y = new DOMCryptoBinary(dkey.getY());
        }

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Examples of java.security.interfaces.DSAParams


    public static byte[] toDerDSAKey(DSAPublicKey pubKey, DSAPrivateKey privKey) throws IOException {
        if (pubKey != null && privKey == null) {
            return pubKey.getEncoded();
        } else if (privKey != null && pubKey != null) {
            DSAParams params = privKey.getParams();
            ASN1EncodableVector v1 = new ASN1EncodableVector();
            v1.add(new DERInteger(0));
            v1.add(new DERInteger(params.getP()));
            v1.add(new DERInteger(params.getQ()));
            v1.add(new DERInteger(params.getG()));
            v1.add(new DERInteger(pubKey.getY()));
            v1.add(new DERInteger(privKey.getX()));
            return new DERSequence(v1).getEncoded();
        } else {
            return privKey.getEncoded();

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Examples of java.security.interfaces.DSAParams

            bcpgKey = new RSAPublicBCPGKey(rK.getModulus(), rK.getPublicExponent());
        }
        else if (pubKey instanceof DSAPublicKey)
        {
            DSAPublicKey    dK = (DSAPublicKey)pubKey;
            DSAParams dP = dK.getParams();


            bcpgKey = new DSAPublicBCPGKey(dP.getP(), dP.getQ(), dP.getG(), dK.getY());
        }
        else if (pubKey instanceof ElGamalPublicKey)
        {
            ElGamalPublicKey        eK = (ElGamalPublicKey)pubKey;
            ElGamalParameterSpec    eS = eK.getParameters();

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Examples of java.security.interfaces.DSAParams

        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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Examples of java.security.interfaces.DSAParams

        if (!(keyValueKey instanceof DSAPublicKey) ||
            !(keyParamsKey instanceof DSAPublicKey))
            throw new CertPathValidatorException("Input key is not " +
                                                 "appropriate type for " +
                                                 "inheriting parameters");
        DSAParams params = ((DSAPublicKey)keyParamsKey).getParams();
        if (params == null)
            throw new CertPathValidatorException("Key parameters missing");
        try {
            BigInteger y = ((DSAPublicKey)keyValueKey).getY();
            KeyFactory kf = KeyFactory.getInstance("DSA");
            DSAPublicKeySpec ks = new DSAPublicKeySpec(y,
                                                       params.getP(),
                                                       params.getQ(),
                                                       params.getG());
            usableKey = kf.generatePublic(ks);
        } catch (Exception e) {
            throw new CertPathValidatorException("Unable to generate key with" +
                                                 " inherited parameters: " +
                                                 e.getMessage(), e);

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Examples of java.security.interfaces.DSAParams

     */
    protected <T extends KeySpec>
        T engineGetKeySpec(Key key, Class<T> keySpec)
    throws InvalidKeySpecException {


        DSAParams params;


        try {


            if (key instanceof java.security.interfaces.DSAPublicKey) {


                // Determine valid key specs
                Class<?> dsaPubKeySpec = Class.forName
                    ("java.security.spec.DSAPublicKeySpec");
                Class<?> x509KeySpec = Class.forName
                    ("java.security.spec.X509EncodedKeySpec");


                if (dsaPubKeySpec.isAssignableFrom(keySpec)) {
                    java.security.interfaces.DSAPublicKey dsaPubKey
                        = (java.security.interfaces.DSAPublicKey)key;
                    params = dsaPubKey.getParams();
                    return (T) new DSAPublicKeySpec(dsaPubKey.getY(),
                                                    params.getP(),
                                                    params.getQ(),
                                                    params.getG());


                } else if (x509KeySpec.isAssignableFrom(keySpec)) {
                    return (T) new X509EncodedKeySpec(key.getEncoded());


                } else {
                    throw new InvalidKeySpecException
                        ("Inappropriate key specification");
                }


            } else if (key instanceof java.security.interfaces.DSAPrivateKey) {


                // Determine valid key specs
                Class<?> dsaPrivKeySpec = Class.forName
                    ("java.security.spec.DSAPrivateKeySpec");
                Class<?> pkcs8KeySpec = Class.forName
                    ("java.security.spec.PKCS8EncodedKeySpec");


                if (dsaPrivKeySpec.isAssignableFrom(keySpec)) {
                    java.security.interfaces.DSAPrivateKey dsaPrivKey
                        = (java.security.interfaces.DSAPrivateKey)key;
                    params = dsaPrivKey.getParams();
                    return (T) new DSAPrivateKeySpec(dsaPrivKey.getX(),
                                                     params.getP(),
                                                     params.getQ(),
                                                     params.getG());


                } else if (pkcs8KeySpec.isAssignableFrom(keySpec)) {
                    return (T) new PKCS8EncodedKeySpec(key.getEncoded());


                } else {

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Examples of java.security.interfaces.DSAParams

        private KeyFactory dsakf;


        DSA(PublicKey key) throws KeyException {
            super(key);
            DSAPublicKey dkey = (DSAPublicKey) key;
            DSAParams params = dkey.getParams();
            p = new DOMCryptoBinary(params.getP());
            q = new DOMCryptoBinary(params.getQ());
            g = new DOMCryptoBinary(params.getG());
            y = new DOMCryptoBinary(dkey.getY());
        }

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Examples of java.security.interfaces.DSAParams

     *    InvalidKeyException if privateKey is not DSAPrivateKey object
     */
    protected void engineInitSign(PrivateKey privateKey)
            throws InvalidKeyException {


        DSAParams params;


        // parameters and private key
        BigInteger p, q, x;


        int n;


        if (privateKey == null || !(privateKey instanceof DSAPrivateKey)) {
            throw new InvalidKeyException(
                    Messages.getString("security.168")); //$NON-NLS-1$
        }


        params = ((DSAPrivateKey) privateKey).getParams();
        p = params.getP();
        q = params.getQ();
        x = ((DSAPrivateKey) privateKey).getX();


        // checks described in DSA standard
        n = p.bitLength();
        if (p.compareTo(BigInteger.valueOf(1)) != 1 || n < 512 || n > 1024

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