session.rb

#
# Copyright (c) 2006-2023 Wade Alcorn - wade@bindshell.net
# Browser Exploitation Framework (BeEF) - http://beefproject.com
# See the file 'doc/COPYING' for copying permission
#
module BeEF
  module Extension
    module AdminUI
      #
      # The session for BeEF UI.
      #
      class Session
        include Singleton

        attr_reader :ip, :id, :nonce, :auth_timestamp

        def initialize
          set_logged_out
          @auth_timestamp = Time.new
        end

        #
        # set the session logged in
        #
        def set_logged_in(ip)
          @id = BeEF::Core::Crypto.secure_token
          @nonce = BeEF::Core::Crypto.secure_token
          @ip = ip
        end

        #
        # set the session logged out
        #
        def set_logged_out
          @id = nil
          @nonce = nil
          @ip = nil
        end

        #
        # set teh auth_timestamp
        #
        def set_auth_timestamp(time)
          @auth_timestamp = time
        end

        #
        # return the session id
        #
        def get_id
          @id
        end

        #
        # return the nonce
        #
        def get_nonce
          @nonce
        end

        #
        # return the auth_timestamp
        #
        def get_auth_timestamp
          @auth_timestamp
        end

        #
        # Check if nonce valid
        #
        def valid_nonce?(request)
          # check if a valid session
          return false unless valid_session?(request)
          return false if @nonce.nil?
          return false unless request.post?

          # get nonce from request
          request_nonce = request['nonce']
          return false if request_nonce.nil?

          # verify nonce
          request_nonce.eql? @nonce
        end

        #
        # Check if a session valid
        #
        def valid_session?(request)
          # check if a valid session exists
          return false if @id.nil?
          return false if @ip.nil?

          # check ip address matches
          return false unless @ip.to_s.eql? request.ip

          # get session cookie name from config
          session_cookie_name = BeEF::Core::Configuration.instance.get('beef.extension.admin_ui.session_cookie_name')

          # check session id matches
          request.cookies.each  do |cookie|
            return true if (cookie[0].to_s.eql? session_cookie_name) and (cookie[1].eql? @id)
          end
          request

          # not a valid session
          false
        end
      end
    end
  end
end