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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package tests.security.interfaces;
     17 
     18 import junit.framework.TestCase;
     19 
     20 import java.security.KeyPair;
     21 import java.security.KeyPairGenerator;
     22 import java.security.SecureRandom;
     23 import java.security.interfaces.DSAPrivateKey;
     24 import java.security.interfaces.DSAPublicKey;
     25 import java.security.spec.DSAParameterSpec;
     26 
     27 public class DSAPublicKeyTest extends TestCase {
     28 
     29     /**
     30      * java.security.interfaces.DSAPublicKey
     31      * #getY()
     32      * test covers following use cases
     33      *   Case 1: check with predefined p, q, g, x
     34      *   Case 2: check with random p, q, g, x. It takes some time (up to
     35      *           minute)
     36      */
     37     public void test_getY() throws Exception {
     38         KeyPairGenerator keyGen = null;
     39         KeyPair keys = null;
     40         DSAPrivateKey priv = null;
     41         DSAPublicKey publ = null;
     42 
     43         // Case 1: check with predefined p, q, g, x
     44         keyGen = KeyPairGenerator.getInstance("DSA");
     45         keyGen.initialize(new DSAParameterSpec(Util.P, Util.Q, Util.G),
     46                 new SecureRandom(new MySecureRandomSpi(), null) {
     47                 });
     48         keys = keyGen.generateKeyPair();
     49         priv = (DSAPrivateKey) keys.getPrivate();
     50         publ = (DSAPublicKey) keys.getPublic();
     51         assertNotNull("Invalid Y value", publ.getY());
     52 
     53         // Case 2: check with random p, q, g, x. It takes some time (up to
     54         // minute)
     55         keyGen = KeyPairGenerator.getInstance("DSA");
     56         keys = keyGen.generateKeyPair();
     57         priv = (DSAPrivateKey) keys.getPrivate();
     58         publ = (DSAPublicKey) keys.getPublic();
     59         assertNotNull("Invalid Y value", publ.getY());
     60     }
     61 }
     62