generatekey.java

java类加密保护类

package com.tmri.sourcesafe;
// GenerateKey.java

import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;

public class GenerateKey
{
  static public void main(String args[] )
  {
      GenerateKey genKey=new GenerateKey();
      try
      {
	  genKey.test();
      }
      catch(Exception ex)
      {
	  ex.printStackTrace();
      }
  }
  public void test()  throws Exception
  {
      String algorithm = "DES";
      String keyFilename="key.data";

      // 生成密匙
      SecureRandom sr = new SecureRandom();
      KeyGenerator kg = KeyGenerator.getInstance( algorithm );
      kg.init( sr );
      SecretKey key = kg.generateKey();

      // 把密匙数据保存到文件
      Util.writeFile( keyFilename, key.getEncoded() );

  }
}