require 'rubygems/remote_fetcher'

$stderr.puts "rubygems ssl client certs plugin loading"

if Gem::Version.new(Gem::VERSION) < Gem::Version.new('2.1.0') then

  class Gem::Version

    def self.correct? version
      version.to_s =~ /\A\s*([0-9]+(?>\.[0-9a-zA-Z]+)*(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?)?\s*\z/
    end

  end

  class Gem::ConfigFile

    attr_reader :ssl_client_cert

    attr_reader :ssl_verify_mode

    attr_reader :ssl_ca_cert
    $stderr.puts "loading Gem::ConfigFile monkey patch"

    class << self
      unless self.method_defined? :__new__
        alias_method :__new__, :new
      end
      def new(*args)
        $stderr.puts "instantiating new Gem::ConfigFile with patch"
        config = __new__(*args)
        config.set_ssl_vars
        return config
      end
    end

    def set_ssl_vars
      $stderr.puts "Configuring SSL variables for Gem::ConfigFile"
      @ssl_verify_mode = @hash[:ssl_verify_mode] if @hash.key? :ssl_verify_mode
      @ssl_ca_cert = @hash[:ssl_ca_cert] if @hash.key? :ssl_ca_cert
      @ssl_ca_cert = ENV['BUNDLE_SSL_CA_CERT'] unless @ssl_ca_cert
      @ssl_client_cert = @hash[:ssl_client_cert] if @hash.key? :ssl_client_cert
      @ssl_client_cert = ENV['BUNDLE_SSL_CLIENT_CERT'] unless @ssl_client_cert
    end

  end

  class Gem::RemoteFetcher

    def connection_for(uri)
      net_http_args = [uri.host, uri.port]

      if @proxy_uri and not no_proxy?(uri.host) then
        net_http_args += [
          @proxy_uri.host,
          @proxy_uri.port,
          @proxy_uri.user,
          @proxy_uri.password
        ]
      end

      connection_id = [Thread.current.object_id, *net_http_args].join ':'
      @connections[connection_id] ||= Net::HTTP.new(*net_http_args)
      connection = @connections[connection_id]

      if https?(uri) and not connection.started? then
        configure_connection_for_https(connection)
      end

      connection.start unless connection.started?

      connection
    rescue defined?(OpenSSL::SSL) ? OpenSSL::SSL::SSLError : Errno::EHOSTDOWN,
           Errno::EHOSTDOWN => e
      raise FetchError.new(e.message, uri)
    end

    def configure_connection_for_https(connection)
      require 'net/https'
      connection.use_ssl = true
      connection.verify_mode =
        Gem.configuration.ssl_verify_mode || OpenSSL::SSL::VERIFY_PEER
      store = OpenSSL::X509::Store.new

      if Gem.configuration.ssl_client_cert
        pem = File.read(Gem.configuration.ssl_client_cert)
        connection.cert = OpenSSL::X509::Certificate.new(pem)
        connection.key = OpenSSL::PKey::RSA.new(pem)
      else
        puts "no Client Cert configured!"
        if !Gem.configuration.respond_to?(:ssl_client_cert)
          puts "Loaded Gem::ConfigFile does not support ssl_client_cert"
        end
      end

      if Gem.configuration.ssl_ca_cert
        if File.directory? Gem.configuration.ssl_ca_cert
          store.add_path Gem.configuration.ssl_ca_cert
        else
          store.add_file Gem.configuration.ssl_ca_cert
        end
      else
        puts "no CA Cert configured!"
        store.set_default_paths
        add_rubygems_trusted_certs(store)
      end
      connection.cert_store = store
    rescue LoadError => e
      raise unless (e.respond_to?(:path) && e.path == 'openssl') ||
                   e.message =~ / -- openssl$/

      raise Gem::Exception.new(
              'Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources')
    end

    def add_rubygems_trusted_certs(store)
      pattern = File.expand_path("./ssl_certs/*.pem", File.dirname(__FILE__))
      Dir.glob(pattern).each do |ssl_cert_file|
        store.add_file ssl_cert_file
      end
    end

    def https?(uri)
      uri.scheme.downcase == 'https'
    end

  end
end