luni/src/test/java/tests/security/interfaces/DSAPublicKeyTest.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package tests.security.interfaces;

import junit.framework.TestCase;

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.interfaces.DSAPrivateKey;
import java.security.interfaces.DSAPublicKey;
import java.security.spec.DSAParameterSpec;

public class DSAPublicKeyTest extends TestCase {

    /**
     * java.security.interfaces.DSAPublicKey
     * #getY()
     * test covers following use cases
     *   Case 1: check with predefined p, q, g, x
     *   Case 2: check with random p, q, g, x. It takes some time (up to
     *           minute)
     */
    public void test_getY() throws Exception {
        KeyPairGenerator keyGen = null;
        KeyPair keys = null;
        DSAPrivateKey priv = null;
        DSAPublicKey publ = null;

        // Case 1: check with predefined p, q, g, x
        keyGen = KeyPairGenerator.getInstance("DSA");
        keyGen.initialize(new DSAParameterSpec(Util.P, Util.Q, Util.G),
                new SecureRandom(new MySecureRandomSpi(), null) {
                });
        keys = keyGen.generateKeyPair();
        priv = (DSAPrivateKey) keys.getPrivate();
        publ = (DSAPublicKey) keys.getPublic();
        assertNotNull("Invalid Y value", publ.getY());

        // Case 2: check with random p, q, g, x. It takes some time (up to
        // minute)
        keyGen = KeyPairGenerator.getInstance("DSA");
        keys = keyGen.generateKeyPair();
        priv = (DSAPrivateKey) keys.getPrivate();
        publ = (DSAPublicKey) keys.getPublic();
        assertNotNull("Invalid Y value", publ.getY());
    }
}