Examples with DSAPrivateKey java.security.interfaces.DSAPrivateKey used on opensource projects

Example 26 with DSAPrivateKey

use of java.security.interfaces.DSAPrivateKey in project robovm by robovm.

the class DSAKeyFactoryImpl method engineGetKeySpec.

/**
     * This method returns a specification for the supplied key.
     *
     * The specification will be returned in the form of an object of the type
     * specified by keySpec.
     *
     * @param key -
     *            either DSAPrivateKey or DSAPublicKey
     * @param keySpec -
     *            either DSAPrivateKeySpec.class or DSAPublicKeySpec.class
     *
     * @return either a DSAPrivateKeySpec or a DSAPublicKeySpec
     *
     * @throws InvalidKeySpecException
     *             if "keySpec" is not a specification for DSAPublicKey or
     *             DSAPrivateKey
     */
protected <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec) throws InvalidKeySpecException {
    BigInteger p, q, g, x, y;
    if (key != null) {
        if (keySpec == null) {
            throw new NullPointerException("keySpec == null");
        }
        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();
                return (T) (new DSAPrivateKeySpec(x, p, q, g));
            }
            if (keySpec.equals(PKCS8EncodedKeySpec.class)) {
                return (T) (new PKCS8EncodedKeySpec(key.getEncoded()));
            }
            throw new InvalidKeySpecException("'keySpec' is neither DSAPrivateKeySpec nor PKCS8EncodedKeySpec");
        }
        if (key instanceof DSAPublicKey) {
            DSAPublicKey publicKey = (DSAPublicKey) key;
            if (keySpec.equals(DSAPublicKeySpec.class)) {
                y = publicKey.getY();
                DSAParams params = publicKey.getParams();
                p = params.getP();
                q = params.getQ();
                g = params.getG();
                return (T) (new DSAPublicKeySpec(y, p, q, g));
            }
            if (keySpec.equals(X509EncodedKeySpec.class)) {
                return (T) (new X509EncodedKeySpec(key.getEncoded()));
            }
            throw new InvalidKeySpecException("'keySpec' is neither DSAPublicKeySpec nor X509EncodedKeySpec");
        }
    }
    throw new InvalidKeySpecException("'key' is neither DSAPublicKey nor DSAPrivateKey");
}

Example 27 with DSAPrivateKey

use of java.security.interfaces.DSAPrivateKey in project robovm by robovm.

the class DSAKeyFactoryImpl method engineTranslateKey.

/**
     * The method generates a DSAPublicKey object from the provided key.
     *
     * @param
     *    key - a DSAPublicKey object or DSAPrivateKey object.
     *
     * @return
     *    object of the same type as the "key" argument
     *
     * @throws InvalidKeyException
     *     if "key" is neither DSAPublicKey nor DSAPrivateKey
     */
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("ATTENTION: InvalidKeySpecException: " + e);
            }
        }
        if (key instanceof DSAPublicKey) {
            DSAPublicKey publicKey = (DSAPublicKey) key;
            DSAParams params = publicKey.getParams();
            try {
                return engineGeneratePublic(new DSAPublicKeySpec(publicKey.getY(), params.getP(), params.getQ(), params.getG()));
            } catch (InvalidKeySpecException e) {
                // Actually this exception shouldn't be thrown
                throw new InvalidKeyException("ATTENTION: InvalidKeySpecException: " + e);
            }
        }
    }
    throw new InvalidKeyException("'key' is neither DSAPublicKey nor DSAPrivateKey");
}

Example 28 with DSAPrivateKey

use of java.security.interfaces.DSAPrivateKey in project robovm by robovm.

the class SHA1withDSA_SignatureImpl method engineInitSign.

/**
     * Initializes this signature object with PrivateKey object
     * passed as argument to the method.
     *
     * @params
     *    privateKey DSAPrivateKey object
     * @throws
     *    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();
    }
    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 || (n & 077) != 0) {
        throw new InvalidKeyException("bad p");
    }
    if (q.signum() != 1 && q.bitLength() != 160) {
        throw new InvalidKeyException("bad q");
    }
    if (x.signum() != 1 || x.compareTo(q) != -1) {
        throw new InvalidKeyException("x <= 0 || x >= q");
    }
    dsaKey = (DSAKey) privateKey;
    msgDigest.reset();
}

Example 29 with DSAPrivateKey

use of java.security.interfaces.DSAPrivateKey in project robovm by robovm.

the class EncodedKeySpec2Test method isEqual.

private boolean isEqual(Key key1, Key key2) {
    if (key1 instanceof DSAPublicKey && key2 instanceof DSAPublicKey) {
        DSAPublicKey dsa1 = ((DSAPublicKey) key1);
        DSAPublicKey dsa2 = ((DSAPublicKey) key2);
        return dsa1.getY().equals(dsa2.getY()) && dsa1.getParams().getG().equals(dsa2.getParams().getG()) && dsa1.getParams().getP().equals(dsa2.getParams().getP()) && dsa1.getParams().getQ().equals(dsa2.getParams().getQ());
    } else if (key1 instanceof DSAPrivateKey && key2 instanceof DSAPrivateKey) {
        DSAPrivateKey dsa1 = ((DSAPrivateKey) key1);
        DSAPrivateKey dsa2 = ((DSAPrivateKey) key2);
        return dsa1.getX().equals(dsa2.getX()) && dsa1.getParams().getG().equals(dsa2.getParams().getG()) && dsa1.getParams().getP().equals(dsa2.getParams().getP()) && dsa1.getParams().getQ().equals(dsa2.getParams().getQ());
    } else {
        return false;
    }
}

Example 30 with DSAPrivateKey

use of java.security.interfaces.DSAPrivateKey in project XobotOS by xamarin.

the class SHA1withDSA_SignatureImpl method engineInitSign.

/**
     * Initializes this signature object with PrivateKey object
     * passed as argument to the method.
     *
     * @params
     *    privateKey DSAPrivateKey object
     * @throws
     *    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();
    }
    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 || (n & 077) != 0) {
        throw new InvalidKeyException("bad p");
    }
    if (q.signum() != 1 && q.bitLength() != 160) {
        throw new InvalidKeyException("bad q");
    }
    if (x.signum() != 1 || x.compareTo(q) != -1) {
        throw new InvalidKeyException("x <= 0 || x >= q");
    }
    dsaKey = (DSAKey) privateKey;
    msgDigest.reset();
}