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Node.js server.setTicketKeys() Method

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The server.setTicketKeys(keys)  is an inbuilt application programming interface of class Socket within tls module which is used to set a 48-byte buffer containing the session ticket keys.

Syntax:

server.setTicketKeys(keys)

Parameters: This method accepts the 48-byte buffer containing the session ticket keys as a parameter.

Return Value: This method has nothing to return.

How to generate private keys and public certificates?

Private key: Open Notepad and copy-paste the following key:

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

Save the file as a private key.pem

Public certificate: Open Notepad and copy and paste the following key:

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

Save the file as public-cert.pem

Example 1: Filename: index.js

javascript




// Node.js program to demonstrate the
// server.setTicketKeys() method
 
const 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
const options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem'),
    rejectUnauthorized: false
};
 
// Creating and initializing server
const 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();
 
    });
 
// Getting session key
// by using getTicketKeys() method
const value1 = server.getTicketKeys();
console.log("old Session key : ")
console.log(value1)
 
const buf = Buffer.from([
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,]);
 
// Setting up the new session key
// by using setTicketKeys() method
server.setTicketKeys(buf)
 
// Getting session key
// by using getTicketKeys() method
const value1 = server.getTicketKeys();
console.log("new Session key : ")
console.log(value1)
 
// Close event
server.on('close', () => {
    console.log("Server closed successfully");
})
 
// Start listening on a specific port and address
server.listen(PORT, HOST, function () {
    console.log("I'm listening at %s, "
        + "on port %s", HOST, PORT);
});
 
// Creating and initializing client
const client = tls.connect(PORT,
    HOST, options, function () {
 
        // Getting the bound address
        // by using address method
        const value = client.address();
        client.write("Bound address : " + value)
 
        client.end();
    });


Output:

old Session key : <Buffer 5a b5 7a 5e d4 f0 29 93 f6 dd 2e 1d d3 7c b9 30 2a 7e 4e 09 17 8c 32 0e d0 b2 6d fd ed 40 c1 ab d1 20 9a 57 1d e4 f4 ad 44 45 54 0b fd cf fd 99> new Session key : <Buffer 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff ff ff 00 00 00 00 ff ff ff ff> I’m listening at 127.0.0.1, on port 1337 Received: Bound address : [object Object] Server closed successfully

Example 2: Filename: index.js

javascript




// Node.js program to demonstrate the
// server.setTicketKeys() method
 
const 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
const options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem'),
    rejectUnauthorized: false
};
 
// Creating and initializing server
const server = tls.createServer(options,
    function (socket) {
 
        // Print the data that we received
        socket.on('data', function (data) {
            console.log('\nReceived: %s ',
                data.toString());
        });
 
        // Stopping the server
        // by using the close() method
        server.close();
    });
 
const buf = Buffer.from([
    0x11, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,]);
 
// Setting up the new session key
// by using setTicketKeys() method
server.setTicketKeys(buf)
 
// Getting session key
// by using getTicketKeys() method
const value = server.getTicketKeys();
 
// Start listening on a specific port and address
server.listen(PORT, HOST, function () {
    console.log("I'm listening at %s, "
        + "on port %s", HOST, PORT);
});
 
// Creating and initializing client
const client = tls.connect(PORT,
    HOST, options, function () {
        client.write("Session key : " + value[0])
        client.end();
    });


Run the index.js file using the following command:

node index.js

Output:

I'm listening at 127.0.0.1, on port 1337

Received: Session key : 17

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



Last Updated : 06 Apr, 2023
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