/**
    * Copyright 2005-2011 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.rice.ksb.messaging;
  
  import org.junit.Test;
  import org.kuali.rice.core.api.config.property.Config;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.ksb.test.KSBTestCase;
  
  import java.io.FileInputStream;
  import java.security.KeyStore;
  import java.security.PrivateKey;
  import java.security.PublicKey;
  import java.security.Signature;
  
  public class DigitalSignatureTest extends KSBTestCase {
  
  
  	/**
  	 * This method tests the existing rice keystore file
  	 * 
  	 * @throws Exception
  	 */
  	@Test public void testSigning() throws Exception {
  		
  		Config config = ConfigContext.getCurrentContextConfig();
  //		config.parseConfig(); 
  //		
  		Signature rsa = Signature.getInstance("SHA1withRSA");
  		String keystoreLocation = config.getKeystoreFile();
  		String keystoreAlias = config.getKeystoreAlias();
  		String keystorePassword = config.getKeystorePassword();
          KeyStore keystore = KeyStore.getInstance("JKS");
          keystore.load(new FileInputStream(keystoreLocation), keystorePassword.toCharArray());
  		PrivateKey privateKey = (PrivateKey)keystore.getKey(keystoreAlias, keystorePassword.toCharArray());
          
  		rsa.initSign(privateKey);
  		
  		String imLovinIt = "Ba-da-ba-ba-baa, I'm lovin' it!";
  		rsa.update(imLovinIt.getBytes());
  		
  		byte[] sigToVerify = rsa.sign();
  		
  		
  		PublicKey publicKey = keystore.getCertificate(keystoreAlias).getPublicKey();
  	    Signature verifySig = Signature.getInstance("SHA1withRSA");
  	    verifySig.initVerify(publicKey);
  	    verifySig.update(imLovinIt.getBytes());
  	    boolean verifies = verifySig.verify(sigToVerify);
  	    System.out.println("signature verifies: " + verifies);
  		
  	}
  	
  }