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 



60
61
62
 
# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 60

def disable!
  @enabled = false
end

.enable! ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 16

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) 


64
65
66
 
# File 'lib/right_support/net/ssl/open_ssl_patch.rb', line 64

def enabled?
  @enabled
end