在Java聊天中实现SSL
我在基本java聊天中实现SSL时遇到了巨大的困难。我也可以做服务器和客户端,但是当涉及到实现ssl时,它总是崩溃,我无法继续 我应该从哪里开始执行代码旁边的实现?我在这里展示的代码有一个使用swing的非常简单的图形界面 ClientChat在Java聊天中实现SSL,java,multithreading,sockets,ssl,Java,Multithreading,Sockets,Ssl,我在基本java聊天中实现SSL时遇到了巨大的困难。我也可以做服务器和客户端,但是当涉及到实现ssl时,它总是崩溃,我无法继续 我应该从哪里开始执行代码旁边的实现?我在这里展示的代码有一个使用swing的非常简单的图形界面 ClientChat package clientchat; import javax.swing.JOptionPane; import static javax.swing.JOptionPane.*; public class ClientChat { publ
package clientchat;
import javax.swing.JOptionPane;
import static javax.swing.JOptionPane.*;
public class ClientChat {
public static void main(String[] args) {
String nome = JOptionPane.showInputDialog(null, "Type your name: ", PLAIN_MESSAGE);
InterfaceChat chat = new InterfaceChat(name);
chat.setVisible(true);
}
}
package clientchat;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import static javax.swing.JOptionPane.ERROR_MESSAGE;
public class InterfaceChat extends javax.swing.JFrame {
private BufferedReader b;
private InputStreamReader i;
private String nome;
private Socket s;
public InterfaceChat(String nome) {
this.nome = nome;
try {
s = new Socket("127.0.0.1", 5000);
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "Não se conectou ao servidor", "", ERROR_MESSAGE);
System.exit(0);
}
initComponents();
Thread();
}
private void Thread(){
Thread t = new Thread(new Runnable() {
String mensagem;
@Override
public void run() {
try{
i = new InputStreamReader(s.getInputStream());
b = new BufferedReader(i);
while((mensagem = b.readLine())!= null){
mensagemRecebida.setText(mensagemRecebida.getText() + mensagem + "\n");
}
}catch(IOException e){
JOptionPane.showMessageDialog(null, "Erro na conexão com o servidor","",ERROR_MESSAGE);
}
}
});
t.start();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
mensagemRecebida = new javax.swing.JTextArea();
jScrollPane2 = new javax.swing.JScrollPane();
enviarMensagem = new javax.swing.JTextArea();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
mensagemRecebida.setColumns(20);
mensagemRecebida.setRows(5);
jScrollPane1.setViewportView(mensagemRecebida);
enviarMensagem.setColumns(20);
enviarMensagem.setRows(5);
enviarMensagem.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
enviarMensagemKeyPressed(evt);
}
});
jScrollPane2.setViewportView(enviarMensagem);
jButton1.setText("Enviar");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Sair");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 312, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 252, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton2))
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String mensagem = nome + ": ";
try {
PrintStream ps = new PrintStream(s.getOutputStream());
mensagem += enviarMensagem.getText();
ps.println(mensagem);
ps.flush();
enviarMensagem.setText("");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Não conseguiu enviar a mensagem", "", ERROR_MESSAGE);
}
}
private void enviarMensagemKeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
String mensagem = nome + ": ";
try {
PrintStream ps = new PrintStream(s.getOutputStream());
mensagem += enviarMensagem.getText();
ps.println(mensagem);
ps.flush();
enviarMensagem.setText("");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Não conseguiu enviar a mensagem", "", ERROR_MESSAGE);
}
}
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
try{
s.close();
System.exit(0);
}
catch(IOException e){
e.printStackTrace();
}
}
// Variables declaration - do not modify
private javax.swing.JTextArea enviarMensagem;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea mensagemRecebida;
// End of variables declaration
}
接口客户端
package clientchat;
import javax.swing.JOptionPane;
import static javax.swing.JOptionPane.*;
public class ClientChat {
public static void main(String[] args) {
String nome = JOptionPane.showInputDialog(null, "Type your name: ", PLAIN_MESSAGE);
InterfaceChat chat = new InterfaceChat(name);
chat.setVisible(true);
}
}
package clientchat;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import static javax.swing.JOptionPane.ERROR_MESSAGE;
public class InterfaceChat extends javax.swing.JFrame {
private BufferedReader b;
private InputStreamReader i;
private String nome;
private Socket s;
public InterfaceChat(String nome) {
this.nome = nome;
try {
s = new Socket("127.0.0.1", 5000);
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "Não se conectou ao servidor", "", ERROR_MESSAGE);
System.exit(0);
}
initComponents();
Thread();
}
private void Thread(){
Thread t = new Thread(new Runnable() {
String mensagem;
@Override
public void run() {
try{
i = new InputStreamReader(s.getInputStream());
b = new BufferedReader(i);
while((mensagem = b.readLine())!= null){
mensagemRecebida.setText(mensagemRecebida.getText() + mensagem + "\n");
}
}catch(IOException e){
JOptionPane.showMessageDialog(null, "Erro na conexão com o servidor","",ERROR_MESSAGE);
}
}
});
t.start();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
mensagemRecebida = new javax.swing.JTextArea();
jScrollPane2 = new javax.swing.JScrollPane();
enviarMensagem = new javax.swing.JTextArea();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
mensagemRecebida.setColumns(20);
mensagemRecebida.setRows(5);
jScrollPane1.setViewportView(mensagemRecebida);
enviarMensagem.setColumns(20);
enviarMensagem.setRows(5);
enviarMensagem.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
enviarMensagemKeyPressed(evt);
}
});
jScrollPane2.setViewportView(enviarMensagem);
jButton1.setText("Enviar");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Sair");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 312, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 252, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton2))
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String mensagem = nome + ": ";
try {
PrintStream ps = new PrintStream(s.getOutputStream());
mensagem += enviarMensagem.getText();
ps.println(mensagem);
ps.flush();
enviarMensagem.setText("");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Não conseguiu enviar a mensagem", "", ERROR_MESSAGE);
}
}
private void enviarMensagemKeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
String mensagem = nome + ": ";
try {
PrintStream ps = new PrintStream(s.getOutputStream());
mensagem += enviarMensagem.getText();
ps.println(mensagem);
ps.flush();
enviarMensagem.setText("");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "Não conseguiu enviar a mensagem", "", ERROR_MESSAGE);
}
}
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
try{
s.close();
System.exit(0);
}
catch(IOException e){
e.printStackTrace();
}
}
// Variables declaration - do not modify
private javax.swing.JTextArea enviarMensagem;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea mensagemRecebida;
// End of variables declaration
}
为此,您必须使用SSLContext。查看我在下面的一个应用程序中实现的示例代码。客户机上下文意味着您成为客户机并调用一些后端。服务器上下文表示您接受客户端请求
public class SSLUtil {
private static String KEY_STORE_TYPE = "JKS";
private static String TRUST_STORE_TYPE = "JKS";
private static String KEY_MANAGER_TYPE = "SunX509";
private static String TRUST_MANAGER_TYPE = "SunX509";
private static String PROTOCOL = "TLS";
private static SSLContext serverSSLCtx = null;
private static SSLContext clientSSLCtx = null;
public static SSLContext createServerSSLContext(final String keyStoreLocation,
final String keyStorePwd)
throws KeyStoreException,
NoSuchAlgorithmException,
CertificateException,
FileNotFoundException,
IOException,
UnrecoverableKeyException,
KeyManagementException {
if (serverSSLCtx == null) {
KeyStore keyStore = KeyStore.getInstance(KEY_STORE_TYPE);
keyStore.load(new FileInputStream(keyStoreLocation), keyStorePwd.toCharArray());
KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KEY_MANAGER_TYPE);
keyManagerFactory.init(keyStore, keyStorePwd.toCharArray());
serverSSLCtx = SSLContext.getInstance(PROTOCOL);
serverSSLCtx.init(keyManagerFactory.getKeyManagers(), null, null);
}
return serverSSLCtx;
}
public static SSLContext createClientSSLContext(final String trustStoreLocation,
final String trustStorePwd)
throws KeyStoreException,
NoSuchAlgorithmException,
CertificateException,
FileNotFoundException,
IOException,
KeyManagementException {
if (clientSSLCtx == null) {
KeyStore trustStore = KeyStore.getInstance(TRUST_STORE_TYPE);
trustStore.load(new FileInputStream(trustStoreLocation), trustStorePwd.toCharArray());
TrustManagerFactory trustManagerFactory =
TrustManagerFactory.getInstance(TRUST_MANAGER_TYPE);
trustManagerFactory.init(trustStore);
clientSSLCtx = SSLContext.getInstance(PROTOCOL);
clientSSLCtx.init(null, trustManagerFactory.getTrustManagers(), null);
}
return clientSSLCtx;
}
}
希望这有帮助。快乐编码
s = new Socket("127.0.0.1", 5000);
正如错误消息中所说,您创建了一个纯文本连接。你需要
s = SSLSocketFactory.getInstance().createSocket("127.0.0.1", 5000);
在这之后,只要客户端信任您的服务器证书,一切都会正常工作。对“总是崩溃”问题的描述没有帮助,请提供更多详细信息。从一个客户端向另一个客户端发送消息时,发送的邮件仅经过加密,无法读取。您“不必为此目的使用
SSLContext
”。您不需要这些。通过系统属性javax.net.ssl.keyStore/keyStoreType/keyStorePassword/trustStore/trustStoreType
,您可以完成完全相同的事情。使用这种代码的唯一原因是如果您想安装不同的KeyManagers
或TrustManagers
。
s = SSLSocketFactory.getInstance().createSocket("127.0.0.1", 5000);