# -*- coding: binary -*-
require "rex/parser/nokogiri_doc_mixin"

require 'msf/core'

module Rex
	module Parser

		# If Nokogiri is available, define the document class.
		load_nokogiri && class CIDocument < Nokogiri::XML::SAX::Document

		include NokogiriDocMixin

		attr_reader :text

		def initialize(*args)
			super(*args)
			@state[:has_text] = true
		end

		# Triggered every time a new element is encountered. We keep state
		# ourselves with the @state variable, turning things on when we
		# get here (and turning things off when we exit in end_element()).
		def start_element(name=nil,attrs=[])
			attrs = normalize_attrs(attrs)
			block = @block

			r = { :e => name }
			attrs.each { |pair| r[pair[0]] = pair[1] }

			if @state[:path]
				@state[:path].push r
			end

			case name
			when "entity"
				@state[:path] = [ r ]
				record_device(r)
			when "property"
				return if not @state[:address]
				return if not @state[:props]
				@state[:props] << [ r["type"], r["key"]]
			end
		end

		# When we exit a tag, this is triggered.
		def end_element(name=nil)
			block = @block
			case name
			when "entity" # Wrap it up
				if @state[:address]
					host_object = report_host &block
					report_services(host_object)
					report_vulns(host_object)
				end
				# Reset the state once we close a host
				@report_data = {:wspace => @args[:wspace]}
				@state[:root] = {}
			when "property"
				if @state[:props]
					@text.strip! if @text
					process_property
					@state[:props].pop
				end
			end
			@state[:path].pop
			@text = nil
		end

		def record_device(info)
			if info["class"] and info["class"] == "host" and info["name"]
				address = info["name"].to_s.gsub(/^.*\//, '')
				return if address !~ /^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/
				@state[:address] = address
				@state[:props]   = []
			end
		end

		def process_property
			return if not @state[:props]
			return if not @state[:props].length > 0
			@state[:root] ||= {}
			@cobj = @state[:root]
			property_parser(0)
		end

		def property_parser(idx)
			return if not @state[:props][idx]
			case @state[:props][idx][0]
			when "container", "ports", "entity", "properties"
				@cobj[ @state[:props][idx][1] ] ||= {}
				@cobj = @cobj[ @state[:props][idx][1] ]
			else
				@cobj[ state[:props][idx][1] ] = @text
			end
			property_parser(idx + 1)
		end

		def report_host(&block)
			@report_data = {
				:ports  => [:ignore],
				:state  => Msf::HostState::Alive,
				:host   => @state[:address]
			}

			if @state[:root]["dns names"] and @state[:root]["dns names"].keys.length > 0
				@report_data[:name] = @state[:root]["dns names"].keys.first
			end

			if host_is_okay
				@report_data.delete(:ports)

				db.emit(:address, @report_data[:host],&block) if block
				host_object = db_report(:host, @report_data.merge(
					:workspace => @args[:wspace] ) )
				if host_object
					db.report_import_note(host_object.workspace, host_object)
				end
				host_object
			end
		end

		def report_services(host_object)
			return unless host_object.kind_of? ::Mdm::Host

			snames = {}
			( @state[:root]["services"] || {} ).each_pair do |sname, sinfo|
				sinfo.each_pair do |pinfo,pdata|
					snames[pinfo] = sname.dup
				end
			end

			reported = []
			if @state[:root]["tcp_ports"]
				@state[:root]["tcp_ports"].each_pair do |pn, ps|
					ps = "open" if ps == "listen"
					svc = { :port => pn.to_i, :state => ps, :proto => 'tcp'}
					if @state[:root]["Banners"] and @state[:root]["Banners"][pn.to_s]
						svc[:info] = @state[:root]["Banners"][pn.to_s]
					end
					svc[:name] = snames["#{pn}-tcp"] if snames["#{pn}-tcp"]
					reported << db_report(:service, svc.merge(:host => host_object))
				end
			end

			if @state[:root]["udp_ports"]
				@state[:root]["udp_ports"].each_pair do |pn, ps|
					ps = "open" if ps == "listen"
					svc = { :port => pn.to_i, :state => ps, :proto => 'udp'}
					svc[:name] = snames["#{pn}-udp"] if snames["#{pn}-tcp"]
					reported << db_report(:service, svc.merge(:host => host_object))
				end
			end

			( @state[:root]["services"] || {} ).each_pair do |sname, sinfo|
				sinfo.each_pair do |pinfo,pdata|
					sport,sproto = pinfo.split("-")
					db_report(:note, {
						:host => host_object,
						:port => sport.to_i,
						:proto => sproto,
						:ntype => "ci.#{sname}.fingerprint",
						:data => pdata
					})
				end
			end

			reported
		end

		def report_vulns(host_object)
			vuln_count = 0
			block = @block
			return unless host_object.kind_of? ::Mdm::Host
			return unless @state[:root]["Vulnerabilities"]
			@state[:root]["Vulnerabilities"].each_pair do |cve, vinfo|
				vinfo.each_pair do |vname, vdesc|
					data = {
						:workspace => host_object.workspace,
						:host => host_object,
						:name => vname,
						:info => vdesc,
						:refs => [ cve ]
					}
					db_report(:vuln, data)
				end
			end
		end

	end
end
end