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Point_S.java
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Point_S.java
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package Client;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
class ServerThread implements Runnable
{
private static String Ks; //会话密钥
private static DES des;
Personal_Info personal_Info = new Personal_Info();
private Socket point_s = null;
public ServerThread(Socket client)
{
this.point_s = client;
}
public void run() {
try{
//获取键盘输入
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
//获取Socket的输出流,用来向好友发送数据
PrintStream out = new PrintStream(point_s.getOutputStream());
//开启一个线程专门用来监听好友端发来的消息并打印输出
new Thread(new recv_S_MessageThread(point_s)).start();
boolean flag =true;
System.out.print("server:请输入消息,回车即发送,以Bye结束聊天");
while(flag)
{
//消息发送给对方
String str = input.readLine();
String message = new String(personal_Info.get_userName()+" :"+str);
out.print(des.encrypt(message.getBytes(), Ks).toString()) ; //用会话密钥加密消息
out.flush();
if(str.equals("Bye"))
break;
}
input.close();
out.close();
point_s.close();
}catch(Exception e){
e.printStackTrace();
}
}
//专门用来监听好友端发来的消息并处理
class recv_S_MessageThread implements Runnable
{
private Key_agreement keyAgreement = new Key_agreement() ;
private RSAUtils rsa = new RSAUtils();
private Socket client = null;
private BufferedReader buf;
public recv_S_MessageThread(Socket client)
{
this.client = client;
}
public void run()
{
try{
//获取Socket的输入流,用来接收从服务端发送过来的数据
buf = new BufferedReader(new InputStreamReader(client.getInputStream()));
while(true)
{
String temp = buf.readLine();
String result[] = temp.split(" ");
//收到对方返回的会话密钥,解密消息,得到会话密钥
if(result[0].equals("Key_Agreement"))
{
//得到 会话密钥
Ks = des.get_Key();
//用对方的公钥加密会话密钥
String str = new String("Key_Agreement "+rsa.encryptByPublicKey(Ks, keyAgreement.askPK(result[1])));
//获取Socket的输出流,用来向好友发送数据
PrintStream out = new PrintStream(point_s.getOutputStream());
out.println(str);
out.flush();
out.close();
}
else if(temp.equals("Bye"))
{
break;
}
else if(temp.equals("fileTrans"))
{
file_trans filetrans = new file_trans();
filetrans.receFile(point_s,Ks);
}
else
{
//解密输出
System.out.println(des.decrypt(temp.getBytes(), Ks).toString());
}
}
}catch(Exception e)
{
e.printStackTrace();
}
}
}
}