Module: RightSupport::Net::SSL::OpenSSLPatch

Defined in:
lib/right_support/net/ssl/open_ssl_patch.rb

Overview

A helper module that provides monkey patch for OpenSSL::SSL.verify_certificate_identity method.

To start use it, all you need is to enable it and then register DNS name of the host, which you will trust for sure. This module automatically adds OpenSSL library and reopens verify_certificate_identity method, to change the SSL algorythm of hostname verification.

Class Method Summary collapse

Class Method Details

.disable! ⇒ Object 



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# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 82

def disable!
  @enabled = false
end

.enable! ⇒ Object 



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# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 38

def enable!
  return if @enabled
  @enabled = true

  OpenSSL::SSL.module_exec do
    def verify_certificate_identity(cert, hostname)
      if RightSupport::Net::SSL::OpenSSLPatch.enabled?
        actual_hostname = RightSupport::Net::SSL.expected_hostname
      end
      actual_hostname ||= hostname
      verify_certificate_identity_without_hack(cert, actual_hostname)
    end
    module_function :verify_certificate_identity

    # The original module function of OpenSSL::SSL
    def verify_certificate_identity_without_hack(cert, hostname)
      should_verify_common_name = true
      cert.extensions.each{|ext|
        next if ext.oid != "subjectAltName"
        ext.value.split(/,\s+/).each{|general_name|
          if /\ADNS:(.*)/ =~ general_name
            should_verify_common_name = false
            reg = Regexp.escape($1).gsub(/\\\*/, "[^.]+")
            return true if /\A#{reg}\z/i =~ hostname
          elsif /\AIP Address:(.*)/ =~ general_name
            should_verify_common_name = false
            return true if $1 == hostname
          end
        }
      }
      if should_verify_common_name
        cert.subject.to_a.each{|oid, value|
          if oid == "CN"
            reg = Regexp.escape(value).gsub(/\\\*/, "[^.]+")
            return true if /\A#{reg}\z/i =~ hostname
          end
        }
      end
      return false
    end
    module_function :verify_certificate_identity_without_hack
  end
end

.enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 86

def enabled?
  @enabled
end