Node.js tlsSocket.getCipher() 方法

tlsSocket.getCipher() 方法是 tls 模块中 TLSSocket 类的内置应用程序编程接口，用于返回包含协商密码套件信息的对象。

句法：

const tlsSocket.getCipher()

参数：此方法不接受任何参数。

返回值：此方法返回一个包含协商密码套件信息的对象。

如何生成私钥和公共证书？

• 私钥
  步骤1：打开记事本并复制粘贴以下密钥：

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

• 第 2 步：另存为private-key.pem
  
• 公共证书
  步骤1：打开记事本并复制粘贴以下密钥：

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

• 第 2 步：另存为public-cert.pem

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// tlsSocket.getCipher() method
var tls = require('tls'),
    fs = require('fs'),
 
// Port and host address for server   
PORT = 1337,
HOST = '127.0.0.1',
value = null;
  
// Private key and public certificate
// for access
var options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('public-cert.pem'),
  rejectUnauthorized: false
};
 
// Creating and initializing server
var server = tls.createServer(options,
                   function(socket) {
 
  // Print the data that we received
  socket.on('data', function(data) {
     console.log('\nReceived: %s ',
     data.toString().replace(/(\n)/gm, ""));
  });
 
  // Stopping the server
  // by using the close() method
  server.close(() => {
     console.log("Server closed successfully");
  });
});
 
// Start listening on a specific port
// and address by using listen() method
server.listen(PORT, HOST, function() {
  console.log(
    "I'm listening at %s, on port %s",
    HOST, PORT);
});
 
// Creating and initializing client
var client = tls.connect(PORT, HOST,
               options, function() {
   
  // Getting local cipher object by
  // using tlsSocket.getCipher() method
  value = client.getCipher();
 
  client.write("Cipher : " + value.name);
   
  client.end(() => {
    console.log("Client closed successfully");
  });
});

输出：

I'm listening at 127.0.0.1, on port 1337
Client closed successfully

Received: Cipher : TLS_AES_256_GCM_SHA384
Server closed successfully

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// tlsSocket.getCipher() method
var tls = require('tls'),
    fs = require('fs'),
 
    // Port and host address for server   
    PORT = 1337,
    HOST = '127.0.0.1';
 
// Private key and public certificate
// for access
var options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem'),
    rejectUnauthorized: false
};
 
// Creating and initializing server
var server = tls.createServer(options,
    function (socket) {
 
        // Getting local cipher object
        // by using tlsSocket.getCipher() method
        value = socket.getCipher();
 
        socket.write("Cipher : " + value.name);
 
        // Stopping the server
        // by using the close() method
        server.close(() => {
            console.log("Server closed successfully")
        });
    });
 
// Start listening on a specific port
// and address by using listen() method
server.listen(PORT, HOST, function () {
    console.log("I'm listening at %s, "
        + "on port %s", HOST, PORT);
});
 
// Creating and initializing client
var client = tls.connect(PORT, HOST,
    options, function () {
        console.log("client is connected");
    });
 
client.on("data", function (data) {
 
    console.log('Received: %s',
        data.toString().replace(/(\n)/gm, ""));
 
    // Close the connection after
    // receiving the message
    client.end(() => {
        console.log("client closed successfully")
    });
});

使用以下命令运行 index.js 文件：

node index.js

输出：

I'm listening at 127.0.0.1, on port 1337
client is connected
Received: Cipher : TLS_AES_256_GCM_SHA384
client closed successfully
Server closed successfully

参考： https://nodejs.org/dist/latest-v12.x/docs/api/tls.html#tls_tlssocket_getcipher