在ruby中获取Web服务器证书

Question

我正在尝试编写一些ruby代码来从Web服务器的SSL证书中获取Common Name（CN）值，但是在ruby中似乎没有任何简单的方法可以做到这一点。

Answer 1

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