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# -*- coding: binary -*-
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require "rex/parser/nokogiri_doc_mixin"
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require 'uri'
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module Rex
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  module Parser
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    # If Nokogiri is available, define Burp Issue document class.
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    load_nokogiri && class BurpIssueDocument < Nokogiri::XML::SAX::Document
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      include NokogiriDocMixin
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      def start_element(name=nil,attrs=[])
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        attrs = normalize_attrs(attrs)
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        block = @block
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        @state[:current_tag][name] = true
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        case name
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          when "host", "name", "info", "issueDetail", "references"
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            @state[:has_text] = true
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        end
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      end
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      def end_element(name=nil)
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        block = @block
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        case name
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          when "issue"
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            report_web_host_info
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            report_web_service_info
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            report_vuln
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            # Reset the state once we close a host
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            @state = @state.select {|k| [:current_tag].include? k}
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          when "host"
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            @state[:has_text] = false
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            collect_host_info
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            @text = nil
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          when "name"
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            @state[:has_text] = false
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            collect_name
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            @text = nil
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          when "issueDetail"
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            @state[:has_text] = false
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            collect_issue_detail
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            @text = nil
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          when "references"
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            @state[:has_text] = false
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            collect_references
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            @text = nil
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        end
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        @state[:current_tag].delete name
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      end
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      def collect_host_info
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        return unless in_issue
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        return unless has_text
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        uri = URI(@text)
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        @state[:host] = uri.host
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        @state[:service_name] = uri.scheme
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        @state[:proto] = "tcp"
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        case @state[:service_name]
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          when "http"
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            @state[:port] = 80
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          when "https"
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            @state[:port] = 443
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        end
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      end
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      def collect_name
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        return unless in_issue
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        return unless has_text
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        @state[:vuln_name] = @text
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      end
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      def collect_issue_detail
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        return unless in_issue
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        return unless has_text
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        @state[:issue_detail] = @text
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      end
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      def collect_references
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        return unless in_issue
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        return unless has_text
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        uri = @text.match('href=[\'"]?([^\'" >]+)')[1]
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        @state[:refs] = ["URI-#{uri}"]
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      end
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      def report_web_host_info
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        return unless @state[:host]
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        address = Rex::Socket.resolv_to_dotted(@state[:host]) rescue nil
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        host_info = {workspace: @args[:workspace]}
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        host_info[:address] = address
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        host_info[:name] = @state[:host]
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        db_report(:host, host_info)
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      end
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      def report_web_service_info
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        return unless @state[:host]
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        return unless @state[:port]
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        return unless @state[:proto]
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        return unless @state[:service_name]
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        service_info = {workspace: @args[:workspace]}
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        service_info[:host] = @state[:host]
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        service_info[:port] = @state[:port]
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        service_info[:proto] = @state[:proto]
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        service_info[:name] = @state[:service_name]
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        @state[:service_object] = db_report(:service, service_info)
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      end
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      def report_vuln
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        return unless @state[:service_object]
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        return unless @state[:vuln_name]
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        return unless @state[:issue_detail]
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        vuln_info = {workspace: @args[:workspace]}
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        vuln_info[:service_id] = @state[:service_object].id
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        vuln_info[:host] = @state[:host]
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        vuln_info[:name] = @state[:vuln_name]
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        vuln_info[:info] = @state[:issue_detail]
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        vuln_info[:refs] = @state[:refs]
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        @state[:vuln_object] = db_report(:vuln, vuln_info)
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      end
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      def in_issue
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        return false unless in_tag("issue")
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        return false unless in_tag("issues")
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        return true
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      end
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      def has_text
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        return false unless @text
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        return false if @text.strip.empty?
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        @text = @text.strip
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      end
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    end
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  end
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end
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