From: dusty <dusty.doris@...>
Date: 2007-10-09T01:20:11+09:00
Subject: finding expiration dates on ssl certificates

Here is a way to find information about an ssl certificate.  I
primarily wanted to do this as an easy way to check the expiration
date.  In case anyone else is looking to do something similar, I
thought I'd share.

require 'net/https'
uri = URI.parse("https://www.somesite.com")
http = Net::HTTP.new(uri.host,uri.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE
http.start do |h|
  @cert = h.peer_cert
end
puts <<EOD
  Subject: #{@cert.subject}
  Issuer:  #{@cert.issuer}
  Serial:  #{@cert.serial}
  Issued:  #{@cert.not_before}
  Expires: #{@cert.not_after}
EOD