This file is indexed.

/usr/lib/ruby/1.8/openssl/ssl-internal.rb is in libruby1.8 1.8.7.352-2ubuntu1.6.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 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
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
=begin
= $RCSfile$ -- Ruby-space definitions that completes C-space funcs for SSL

= Info
  'OpenSSL for Ruby 2' project
  Copyright (C) 2001 GOTOU YUUZOU <gotoyuzo@notwork.org>
  All rights reserved.

= Licence
  This program is licenced under the same licence as Ruby.
  (See the file 'LICENCE'.)

= Version
  $Id$
=end

require "openssl/buffering"
require "fcntl"

module OpenSSL
  module SSL
    class SSLContext
      DEFAULT_PARAMS = {
        :ssl_version => "SSLv23",
        :verify_mode => OpenSSL::SSL::VERIFY_PEER,
        :ciphers => "ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW",
        :options => OpenSSL::SSL::OP_ALL,
      }

      DEFAULT_CERT_STORE = OpenSSL::X509::Store.new
      DEFAULT_CERT_STORE.set_default_paths
      if defined?(OpenSSL::X509::V_FLAG_CRL_CHECK_ALL)
        DEFAULT_CERT_STORE.flags = OpenSSL::X509::V_FLAG_CRL_CHECK_ALL
      end

      def set_params(params={})
        params = DEFAULT_PARAMS.merge(params)
        # ssl_version need to be set at first.
        self.ssl_version = params.delete(:ssl_version)
        params.each{|name, value| self.__send__("#{name}=", value) }
        if self.verify_mode != OpenSSL::SSL::VERIFY_NONE
          unless self.ca_file or self.ca_path or self.cert_store
            self.cert_store = DEFAULT_CERT_STORE
          end
        end
        return params
      end
    end

    module SocketForwarder
      def addr
        to_io.addr
      end

      def peeraddr
        to_io.peeraddr
      end

      def setsockopt(level, optname, optval)
        to_io.setsockopt(level, optname, optval)
      end

      def getsockopt(level, optname)
        to_io.getsockopt(level, optname)
      end

      def fcntl(*args)
        to_io.fcntl(*args)
      end

      def closed?
        to_io.closed?
      end

      def do_not_reverse_lookup=(flag)
        to_io.do_not_reverse_lookup = flag
      end
    end

    module Nonblock
      def initialize(*args)
        flag = File::NONBLOCK
        flag |= @io.fcntl(Fcntl::F_GETFL) if defined?(Fcntl::F_GETFL)
        @io.fcntl(Fcntl::F_SETFL, flag)
        super
      end
    end

    def verify_certificate_identity(cert, hostname)
      should_verify_common_name = true
      cert.extensions.each{|ext|
        next if ext.oid != "subjectAltName"
        ostr = OpenSSL::ASN1.decode(ext.to_der).value.last
        sequence = OpenSSL::ASN1.decode(ostr.value)
        sequence.value.each{|san|
          case san.tag
          when 2 # dNSName in GeneralName (RFC5280)
            should_verify_common_name = false
            reg = Regexp.escape(san.value).gsub(/\\\*/, "[^.]+")
            return true if /\A#{reg}\z/i =~ hostname
          when 7 # iPAddress in GeneralName (RFC5280)
            should_verify_common_name = false
            # follows GENERAL_NAME_print() in x509v3/v3_alt.c
            if san.value.size == 4
              return true if san.value.unpack('C*').join('.') == hostname
            elsif san.value.size == 16
              return true if san.value.unpack('n*').map { |e| sprintf("%X", e) }.join(':') == hostname
            end
          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

    class SSLSocket
      include Buffering
      include SocketForwarder
      include Nonblock

      def post_connection_check(hostname)
        unless OpenSSL::SSL.verify_certificate_identity(peer_cert, hostname)
          raise SSLError, "hostname was not match with the server certificate"
        end
        return true
      end

      def session
        SSL::Session.new(self)
      rescue SSL::Session::SessionError
        nil
      end
    end

    class SSLServer
      include SocketForwarder
      attr_accessor :start_immediately

      def initialize(svr, ctx)
        @svr = svr
        @ctx = ctx
        unless ctx.session_id_context
          session_id = OpenSSL::Digest::MD5.hexdigest($0)
          @ctx.session_id_context = session_id
        end
        @start_immediately = true
      end

      def to_io
        @svr
      end

      def listen(backlog=5)
        @svr.listen(backlog)
      end

      def shutdown(how=Socket::SHUT_RDWR)
        @svr.shutdown(how)
      end

      def accept
        sock = @svr.accept
        begin
          ssl = OpenSSL::SSL::SSLSocket.new(sock, @ctx)
          ssl.sync_close = true
          ssl.accept if @start_immediately
          ssl
        rescue SSLError => ex
          sock.close
          raise ex
        end
      end

      def close
        @svr.close
      end
    end
  end
end