NodeJS https server returning ERR_SSL_PROTOCOL_ERROR using express

Question

I'm trying to get SSL https working on my nodejs server but the browser returns a ERR_SSL_PROTOCOL_ERROR

code:

var express = require('express');
var https = require('https');
var http = require('http');
var fs = require('fs');

var options = {
    key: fs.readFileSync('key.pem'),
    cert: fs.readFileSync('cert.pem')
}

http.createServer(app).listen(80);
https.createServer(options, app).listen(443);

That should work https.createServer(sslOptions, app), verify you are getting the certificates correctly. When reading the files maybe you need to add __dirname + 'key.pem' — Hosar
– Hosar, Commented Jan 27, 2017 at 13:51

Allan Wintersieck · Accepted Answer · 2017-03-14 00:04:28Z

6

This will happen if your key isn't generated correctly.

A lot of places will tell you to do this:

openssl genrsa -out key.pem

That will not work if you're on a Mac, and instead you need to do this to make the key length 2048:

openssl genrsa -out key.pem 2048

In summary, do these steps to make a correct key on Mac:

openssl genrsa -out key.pem 2048
openssl req -new -key key.pem -out client.csr
openssl x509 -req -in client.csr -signkey key.pem -out cert.pem

answered Mar 14, 2017 at 0:04

Allan Wintersieck

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