x509 Certificate Parser is helpful

[kvnn]

Using node-x509 [1] and your convertCertToPEM function I'm able to get data from the result.certificate buffer, which I was having some trouble with.

Here is an example:
if (result.successful) {
console.log('certificate', x509.getIssuer(convertCertToPEM(result.certificate)));

Would you like me to add this to the README?

[1] https://github.com/Southern/node-x509

[kvnn]

Also - it'd be nice to make convertCertToPEM public for this usage.