292 lines
8.5 KiB
Ruby
292 lines
8.5 KiB
Ruby
# -*- coding: binary -*-
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require "rex/parser/nokogiri_doc_mixin"
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module Rex
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module Parser
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# If Nokogiri is available, define Burp Session document class.
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#
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# Burp Session XML files actually provide a lot, but since it also
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# provides the originating url, we can pull most of the detail from
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# the URI object.
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load_nokogiri && class BurpSessionDocument < Nokogiri::XML::SAX::Document
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include NokogiriDocMixin
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# The resolver prefers your local /etc/hosts (or windows equiv), but will
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# fall back to regular DNS. It retains a cache for the import to avoid
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# spamming your network with DNS requests.
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attr_reader :resolv_cache
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# Since we try to resolve every time we hit a new web page, need to
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# hang on to our misses. Presume that it's a permanent enough failure
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# that it won't get fixed during this particular import
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attr_reader :missed_cache
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# If name resolution of the host fails out completely, you will not be
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# able to import that Scan task. Other scan tasks in the same report
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# should be unaffected.
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attr_reader :parse_warning
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def start_document
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@parse_warnings = []
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@parse_warned = []
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@resolv_cache = {}
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@missed_cache = []
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end
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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", "port", "protocol", "path"
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@state[:has_text] = true
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when "status"
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@state[:has_text] = true
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when "response"
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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 "item" # Wrap up this item, but keep resolved web sites
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collect_uri
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report_web_site(&block)
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handle_parse_warnings(&block)
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report_web_page(&block)
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report_web_service_info
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report_web_host_info
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# Reset the state once we close a host
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@state = @state.select {|k| [:current_tag, :web_sites].include? k}
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when "host"
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@state[:has_text] = false
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collect_host
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@text = nil
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when "port"
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@state[:has_text] = false
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collect_port
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@text = nil
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when "protocol"
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@state[:has_text] = false
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collect_protocol
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@text = nil
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when "path"
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@state[:has_text] = false
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collect_path_and_query
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@text = nil
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when "status"
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@state[:has_text] = false
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collect_status
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@text = nil
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when "response"
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@state[:has_text] = false
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collect_response
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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
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return unless in_item
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return unless has_text
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@state[:host] = @text
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end
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def collect_port
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return unless in_item
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return unless has_text
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return unless @text.to_i.to_s == @text.to_s
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@state[:port] = @text.to_i
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end
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def collect_protocol
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return unless in_item
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return unless has_text
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@state[:protocol] = @text
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end
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def collect_path_and_query
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return unless in_item
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return unless has_text
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path,query = @text.split(/\?+/,2)
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return unless path
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if query
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@state[:query] = "?#{query}" # Can be nil
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end
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if path =~ /https?:[\x5c\x2f][\x5c\x2f]+[^\x5c\x2f][^\x5c\x2f]+([^?]+)/n
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real_path = "/#{$1}"
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else
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real_path = path
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end
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@state[:path] = real_path
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end
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def collect_status
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return unless in_item
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return unless has_text
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return unless @text.to_i.to_s == @text
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@state[:status] = @text.to_i
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end
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def collect_uri
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return unless in_item
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return unless @state[:host]
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return unless @state[:port]
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return unless @state[:protocol]
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return unless @state[:path]
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url = @state[:protocol].to_s
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url << "://"
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url << @state[:host].to_s
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url << ":"
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url << @state[:port].to_s
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url << @state[:path]
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if @state[:query]
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url << "?"
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url << @state[:query]
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end
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@state[:uri] = URI.parse(url) rescue nil
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end
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def report_web_host_info
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return unless @state[:web_site]
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return unless @state[:uri].kind_of? URI::HTTP
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return unless @state[:web_site].service.host.name.to_s.empty?
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host_info = {:workspace => @args[:wspace]}
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host_info[:address] = @state[:web_site].service.host.address
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host_info[:name] = @state[:uri].host
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report_db(:host, host_info)
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end
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def report_web_service_info
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return unless @state[:web_site]
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return unless @state[:service_info]
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return unless @state[:web_site].service.info.to_s.empty?
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service_info = {}
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service_info[:host] = @state[:web_site].service.host
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service_info[:port] = @state[:web_site].service.port
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service_info[:proto] = @state[:web_site].service.proto
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service_info[:info] = @state[:service_info]
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db_report(:service, service_info)
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end
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def report_web_page(&block)
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return unless @state[:uri].kind_of? URI::HTTP
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return unless @state[:status]
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return unless @state[:web_site]
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return unless @state[:response_headers].kind_of? Hash
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headers = {}
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@state[:response_headers].each do |k,v|
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headers[k.to_s.downcase] ||= []
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headers[k.to_s.downcase] << v
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end
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if headers["server"].kind_of? Array
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@state[:service_info] = headers["server"].first
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end
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return unless @state[:response_body]
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web_page_info = {:workspace => @args[:wspace]}
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web_page_info[:web_site] = @state[:web_site]
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web_page_info[:code] = @state[:status]
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web_page_info[:path] = @state[:uri].path
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web_page_info[:headers] = headers
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web_page_info[:body] = @state[:response_body]
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web_page_info[:query] = @state[:uri].query
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url = @state[:uri].to_s.gsub(/\?.*/,"")
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db.emit(:web_page, url, &block) if block
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db_report(:web_page, web_page_info)
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end
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def report_web_site(&block)
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return unless @state[:uri].kind_of? URI::HTTP
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vhost = @state[:uri].host
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web_site_info = {:workspace => @args[:wspace]}
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web_site_info[:vhost] = vhost
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address = resolve_vhost_address(@state[:uri])
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return unless address
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web_site_info[:host] = address
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web_site_info[:port] = @state[:uri].port
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web_site_info[:ssl] = @state[:uri].kind_of? URI::HTTPS
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web_site_obj = db_report(:web_site, web_site_info)
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return unless web_site_obj
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@state[:web_sites] ||= []
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url = "#{@state[:uri].scheme}://#{@state[:uri].host}:#{@state[:uri].port}"
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unless @state[:web_sites].include? web_site_obj
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db.emit(:web_site, url, &block)
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@state[:web_sites] << web_site_obj
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end
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@state[:web_site] = web_site_obj
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end
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def collect_response
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return unless in_item
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return unless has_text
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response_text = @text.dup
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response_header_text,response_body_text = response_text.split(/\r*\n\r*\n/n,2)
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return unless response_header_text
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response_header = Rex::Proto::Http::Packet::Header.new
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response_header.from_s response_header_text
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@state[:response_headers] = response_header
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@state[:response_body] = response_body_text
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end
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def in_item
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return false unless in_tag("item")
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return false unless in_tag("items")
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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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def handle_parse_warnings(&block)
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return if @parse_warnings.empty?
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return unless block
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@parse_warnings.each_with_index do |pwarn,i|
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unless @parse_warned.include? i
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db.emit(:warning, pwarn, &block)
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@parse_warned << i
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end
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end
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end
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def resolve_address(host)
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return @resolv_cache[host] if @resolv_cache[host]
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return false if @missed_cache.include? host
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address = Rex::Socket.resolv_to_dotted(host) rescue nil
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@resolv_cache[host] = address
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if address
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block = @block
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db.emit(:address, address, &block) if block
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else
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@missed_cache << host
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end
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return address
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end
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# Alias this
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def resolve_vhost_address(uri)
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if uri.host
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address = resolve_address(uri.host)
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case address
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when false
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return false
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when nil
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@parse_warnings << "Could not resolve address for '#{uri.host}', skipping."
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end
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else
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@parse_warnings << "Could not determine a host for this import."
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end
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address
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end
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end
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end
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end
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