一、单向认证流程
单向认证流程中，服务器端保存着公钥证书和私钥两个文件，整个握手过程如下：
- 客户端发起建立HTTPS连接请求，将SSL协议版本的信息发送给服务器端；
- 服务器端将本机的公钥证书（server.crt）发送给客户端；
- 客户端读取公钥证书（server.crt），取出了服务端公钥；
- 客户端生成一个随机数（密钥R），用刚才得到的服务器公钥去加密这个随机数形成密文，发送给服务端；
- 服务端用自己的私钥（server.key）去解密这个密文，得到了密钥R
- 服务端和客户端在后续通讯过程中就使用这个密钥R进行通信了。
二、Java代码
选择使用单向认证，这种情况下client侧不需要提供证书。所以， server侧只需要自己的keystore文件，不需要truststore文件 client侧不需要自己的keystore文件，只需要truststore文件（其中包含server的公钥）。 此外server侧需要在创建SSLServerSocket之后设定不需要客户端证书：setNeedClientAuth(false)
其中生成证书的命令可以查看 02-HTTPS证书生成、验签 、证书链
server代码
public class CatServerNoClientAuth implements Runnable, HandshakeCompletedListener {
public static final int SERVER_PORT = 11123;
private final Socket _s;
public CatServerNoClientAuth(Socket s) {
_s = s;
}
public static void main(String[] args) throws Exception {
String serverKeyStoreFile = "D:\code\mycode\java-study\https\src\main\resources\server.p12";
String serverKeyStorePwd = "huawei";
String catServerKeyPwd = "huawei";
KeyStore serverKeyStore = KeyStore.getInstance("JKS");
serverKeyStore.load(new FileInputStream(serverKeyStoreFile), serverKeyStorePwd.toCharArray());
KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
kmf.init(serverKeyStore, catServerKeyPwd.toCharArray());
SSLContext sslContext = SSLContext.getInstance("TLSv1");
sslContext.init(kmf.getKeyManagers(), null, null);
SSLServerSocketFactory sslServerSocketFactory = sslContext.getServerSocketFactory();
SSLServerSocket sslServerSocket = (SSLServerSocket) sslServerSocketFactory.createServerSocket(SERVER_PORT);
sslServerSocket.setNeedClientAuth(false);
while (true) {
SSLSocket s = (SSLSocket) sslServerSocket.accept();
CatServerNoClientAuth cs = new CatServerNoClientAuth(s);
s.addHandshakeCompletedListener(cs);
new Thread(cs).start();
}
}
@Override
public void run() {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(_s.getInputStream()));
PrintWriter writer = new PrintWriter(_s.getOutputStream(), true);
writer.println("Welcome~, enter exit to leave.");
String s;
while ((s = reader.readLine()) != null && !s.trim().equalsIgnoreCase("exit")) {
writer.println("Echo: " + s);
}
writer.println("Bye~");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
_s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void handshakeCompleted(HandshakeCompletedEvent event) {
try {
X509Certificate cert = (X509Certificate) event.getPeerCertificates()[0];
} catch (SSLPeerUnverifiedException ex) {
System.out.println("handshakeCompleted, SSLPeerUnverified.");
}
}
}
client代码
public class FoxClientNoClientAuth {
public static void main(String[] args) throws Exception {
String clientTrustKeyStoreFile = "D:\code\mycode\java-study\https\src\main\resources\root.p12";
String clientTrustKeyStorePwd = "huawei";
KeyStore clientTrustKeyStore = KeyStore.getInstance("JKS");
clientTrustKeyStore.load(new FileInputStream(clientTrustKeyStoreFile), clientTrustKeyStorePwd.toCharArray());
TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(clientTrustKeyStore);
SSLContext sslContext = SSLContext.getInstance("TLSv1");
sslContext.init(null, tmf.getTrustManagers(), null);
SSLSocketFactory socketFactory = sslContext.getSocketFactory();
Socket socket = socketFactory.createSocket("localhost", 11123);
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
send("hello", out);
send("exit", out);
receive(in);
socket.close();
}
public static void send(String s, PrintWriter out) throws IOException {
System.out.println("Sending: " + s);
out.println(s);
}
public static void receive(BufferedReader in) throws IOException {
String s;
while ((s = in.readLine()) != null) {
System.out.println("Reveived: " + s);
}
}
}
参考文章：
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