node.js - how to check/get ssl certificate expiry date

Question

I have the Let's encrypt certificate bundle. It includes the private key and certificate.crt

Using node.js and node-forge (not openssl), how can I get the expiry date of the certificate.crt?

Answer 1

You can use x509 module

var crt_pem = "<certificate in pem format which is content of your certificate.crt>";
const x509 = require('x509');
var crt_obj = x509.parseCert(crt_pem);
console.log(crt_obj.notBefore);
console.log(crt_obj.notAfter);