CODEWITHSUNDEEP
rubysslcertificate
user488244
user488244

Reputation: 151

Getting a web server certificate in ruby

I'm trying to write some ruby code to grab the Common Name (CN) value from a web server's SSL certificate but there doesn't seem to be any simple way to do this in ruby.

Upvotes: 2

Views: 1793

Answers (1)

Sam
Sam

Reputation: 894

Well, I would beg to differ. It's documented well enough but not too many examples are available, which makes it a bit, but not too complicated :)

require 'openssl'

raw_cert = File.read (path_to_your_cert) # if your cert is in PEM or DER format

OR 

raw_cert = OpenSSL::PKCS12.new(File.read(path_to_your_cert), your_pwd) # If you want to read a .p12 cert

cert = OpenSSL::X509::Certificate.new(raw_cert)
cert.subject
=> **************/CN=<Your Common Name>/***************

So you can parse cert.subject to find out the common name you need.

You can read more in-depth on SSL certs at http://ruby-doc.org/stdlib-2.0/libdoc/openssl/rdoc/OpenSSL/X509/Certificate.html

Upvotes: 3

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