CODEWITHSUNDEEP
javascriptnode.jssslnpmssl-certificate
NetOperator Wibby
NetOperator Wibby

Reputation: 1404

How to read SSL data?

I found a neat npm package that allows for this, called sslinfo. However, this doesn't work for some reason (I'm getting Uncaught Error: Module did not self-register). Is there some other way I can read a site's SSL info via node.js/JavaScript/jQuery?

EDIT:

For future searchers! The accepted answer is correct, but what if you want some actionable data? This is what works for me (for now):

results.toString().match(/subject=\/(.*)/)[1].match(/CN=(.*)/)[1] // Subject Common Name
results.toString().match(/subject=\/(.*)/)[1].match(/O=(.*)\//)[1] // Subject Organization Name

results.toString().match(/issuer=\/(.*)/)[1].match(/CN=(.*)/)[1] // Issuer Common Name
results.toString().match(/issuer=\/(.*)/)[1].match(/O=(.*)\//)[1] // Issuer Organization Name

All this regex is ugly but, sslinfo wasn't cooperating. Also, I modified the answer code slightly to:

openssl.exec("s_client", {
  showcerts: true, connect: url // "url" is what I'm passing to the function
}, function (err, results) {
  console.log(
    // results.toString().match(/subject=\/(.*)/)[1].match(/CN=(.*)/)[1] // Subject Common Name
    // results.toString().match(/subject=\/(.*)/)[1].match(/O=(.*)\//)[1] // Subject Organization Name

    // results.toString().match(/issuer=\/(.*)/)[1].match(/CN=(.*)/)[1] // Issuer Common Name
    // results.toString().match(/issuer=\/(.*)/)[1].match(/O=(.*)\//)[1] // Issuer Organization Name
  );
});

Upvotes: 0

Views: 309

Answers (1)

myconode
myconode

Reputation: 2617

sslinfo is based on openssl-wrapper, so that can be used directly. E.g:

var openssl = require('openssl-wrapper');

var url = 'www.google.com:443'

return openssl.exec('s_client', {showcerts: true, connect: url }, function(err, buffer) {
    console.log(buffer.toString());
});

Equivalent to this on the command line:

openssl s_client -showcerts -connect www.google.com:443

Upvotes: 2

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