# File lib/serverspec/type/x509_certificate.rb, line 63
    def subject_alt_names
      text = run_openssl_command_with('-text -noout').stdout
      # X509v3 Subject Alternative Name:
      #     DNS:*.example.com, DNS:www.example.net, IP:192.0.2.10
      if text =~ /^ *X509v3 Subject Alternative Name:.*\n *(.*)$/
        $1.split(/, +/)
      end
    end