CODEWITHSUNDEEP
node.js
Andrew Jones
Andrew Jones

Reputation: 29

How to find the TLS version for the HTTPS Request library?

I am running on Node v10.16.0 and I have a client and server both using HTTPS. I am trying to measure the performance of my network, in particular the https.request(GET) my client makes to the server. I have a question that I can't seem able to answer:
What version of TLS does Node v10.16.0 http.request run?

The getProtocol() is able to be called on a tls socket from tls.createServer(). I am trying to find the version of tls on a socket from https.createServer()

Upvotes: 0

Views: 1280

Answers (1)

jfriend00
jfriend00

Reputation: 707148

https.request() uses the TLS support built into node.js. When the socket is active, it appears you can call socket.getCipher() and get a result such as:

{ name: 'AES256-SHA', version: 'TLSv1.2' }

So, presumably, you could call that function from one of the events that occurs during a request and use res.socket to get the live socket being used in the request and then use that socket to call socket.getCipher().

Here's an example:

const https = require('https');

const req = https.request("https://www.google.com", function(res) {

    console.log(res.socket.getCipher());

    res.on('data', function(data) {
        // something here on incoming data
    });
});
req.end();

I have node v12.13 installed and this outputs:

 { name: 'TLS_AES_256_GCM_SHA384', version: 'TLSv1.3' }

for me. You can run it on your own node version to see what you have.

Upvotes: 2

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