rmisignclient.java

java EJB 编程源代码。

import java.rmi.*;
import java.rmi.server.*;
import java.io.*;
import java.security.*;

public class RMISignClient
  {
   public static void main(String[] args)
     {
      String RemoteSerHost = null;
      RMISignInterface rmisi = null;
      String outprint = null;
      RMISignObject rmiso = null;
      Signature signature = null;
      boolean isValid = false;
      String testTxt = null;

      try
        {
         RemoteSerHost = "//127.0.0.1/SignServer";
         testTxt = "It is a test";
         System.out.println("\n本地客户机开始启动...");
         rmisi = (RMISignInterface) Naming.lookup(RemoteSerHost);
         outprint = rmisi.putString(testTxt);    
         System.out.println("\n本地客户机接收到的正文为: " + outprint);
         rmiso = rmisi.getSignObj();    //获得RMI数字签名对象
         System.out.println("RMI数字签名对象为: " +rmiso.toString());
         signature = Signature.getInstance("SHA/DSA");
         signature.initVerify(rmiso.puk);
         signature.update(rmiso.seriTxt);       //更新数字签名序列化的对象
         System.out.println("\nRMI数字签名对象的公钥为：" +rmiso.puk);
         isValid = signature.verify(rmiso.signTxt);     //判断RMI数字签名是否有效
         if(isValid == true)
           {
            System.out.println("这是有效的RMI数字签名!");
           }
         else
           {
            System.out.println("这是无效的RMI数字签名!");
           }
        }
      catch(Exception e)
        {
         System.out.println("! 客户机在运行时抛出例外：" + e.toString());
        }
     }
  }