Class: Arachni::Browser

Inherits:
Object show all
Includes:
Support::Mixins::Observable, UI::Output, Utilities
Defined in:
lib/arachni/browser.rb,
lib/arachni/browser/javascript.rb,
lib/arachni/browser/element_locator.rb,
lib/arachni/browser/javascript/dom_monitor.rb,
lib/arachni/browser/javascript/taint_tracer.rb,
lib/arachni/browser/javascript/taint_tracer/frame.rb,
lib/arachni/browser/javascript/taint_tracer/sink/base.rb,
lib/arachni/browser/javascript/taint_tracer/sink/data_flow.rb,
lib/arachni/browser/javascript/taint_tracer/sink/execution_flow.rb,
lib/arachni/browser/javascript/taint_tracer/frame/called_function.rb

Overview

Note:

Depends on PhantomJS 2.1.1.

Real browser driver providing DOM/JS/AJAX support.

Author:

Direct Known Subclasses

Arachni::BrowserCluster::Worker

Defined Under Namespace

Classes: ElementLocator, Error, Javascript

Constant Summary collapse

BROWSER_SPAWN_TIMEOUT =

How much time to wait for the PhantomJS process to spawn before respawning.

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ELEMENT_APPEARANCE_TIMEOUT =

How much time to wait for a targeted HTML element to appear on the page after the page is loaded.

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ASSET_EXTENSIONS = 
Set.new(%w( css js jpg jpeg png gif json ))
INPUT_EVENTS = 
Set.new([
    :change, :blur, :focus, :select, :keyup, :keypress, :keydown, :input
])
INPUT_EVENTS_TO_FORCE = 
Set.new([
    :focus, :change, :blur, :select
])
ASSET_EXTRACTORS = 
[
    /<\s*link.*?href=\s*['"]?(.*?)?['"]?[\s>]/im,
    /src\s*=\s*['"]?(.*?)?['"]?[\s>]/i,
]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utilities

#available_port, available_port_mutex, #bytes_to_kilobytes, #bytes_to_megabytes, #caller_name, #caller_path, #cookie_decode, #cookie_encode, #cookies_from_file, #cookies_from_parser, #cookies_from_response, #exception_jail, #exclude_path?, #follow_protocol?, #form_decode, #form_encode, #forms_from_parser, #forms_from_response, #full_and_absolute_url?, #generate_token, #get_path, #hms_to_seconds, #html_decode, #html_encode, #include_path?, #links_from_parser, #links_from_response, #normalize_url, #page_from_response, #page_from_url, #parse_set_cookie, #path_in_domain?, #path_too_deep?, #port_available?, #rand_port, #random_seed, #redundant_path?, #regexp_array_match, #remove_constants, #request_parse_body, #seconds_to_hms, #skip_page?, #skip_resource?, #skip_response?, #to_absolute, #uri_decode, #uri_encode, #uri_parse, #uri_parse_query, #uri_parser, #uri_rewrite

Methods included from UI::Output

#caller_location, #debug?, #debug_level, #debug_level_1?, #debug_level_2?, #debug_level_3?, #debug_level_4?, #debug_off, #debug_on, #disable_only_positives, #error_buffer, #error_log_fd, #error_logfile, #has_error_log?, #included, #log_error, #mute, #muted?, #only_positives, #only_positives?, #print_bad, #print_debug, #print_debug_backtrace, #print_debug_exception, #print_debug_level_1, #print_debug_level_2, #print_debug_level_3, #print_debug_level_4, #print_error, #print_error_backtrace, #print_exception, #print_info, #print_line, #print_ok, #print_status, #print_verbose, #reroute_to_file, #reroute_to_file?, reset_output_options, #set_error_logfile, #unmute, #verbose?, #verbose_off, #verbose_on

Constructor Details

#initialize(options = {}) ⇒ Browser

Returns a new instance of Browser.

Parameters:

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :concurrency (Integer) —

    Maximum number of concurrent connections.

  • :store_pages (Bool) — default: true —

    Whether to store pages in addition to just passing them to #on_new_page.

  • :width (Integer) — default: 1600 —

    Window width.

  • :height (Integer) — default: 1200 —

    Window height.



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# File 'lib/arachni/browser.rb', line 181

def initialize( options = {} )
    super()
    @options = options.dup

    @ignore_scope = options[:ignore_scope]

    @width  = options[:width]  || 1600
    @height = options[:height] || 1200

    @options[:store_pages] = true if !@options.include?( :store_pages )

    start_webdriver

    # User-controlled preloaded responses, by URL.
    @preloads = {}

    # Captured pages -- populated by #capture.
    @captured_pages = []

    # Snapshots of the working page resulting from firing of events and
    # clicking of JS links.
    @page_snapshots = {}

    # Same as @page_snapshots but it doesn't deduplicate and only contains
    # pages with sink (Page::DOM#sink) data as populated by Javascript#flush_sink.
    @page_snapshots_with_sinks = []

    # Captures HTTP::Response objects per URL for open windows.
    @window_responses = {}


    # Keeps track of resources which should be skipped -- like already fired
    # events and clicked links etc.
    @skip_states = Support::LookUp::HashSet.new( hasher: :persistent_hash )

    @transitions = []
    @request_transitions = []
    @add_request_transitions = true

    # Last loaded URL.
    @last_url = nil

    @javascript = Javascript.new( self )
end

Instance Attribute Details

#javascript ⇒ Javascript (readonly)

Returns:



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# File 'lib/arachni/browser.rb', line 118

def javascript
  @javascript
end

#last_url ⇒ Object (readonly)

Returns the value of attribute last_url.



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# File 'lib/arachni/browser.rb', line 127

def last_url
  @last_url
end

#page_snapshots_with_sinks ⇒ Array<Page> (readonly)

Returns Same as #page_snapshots but it doesn't deduplicate and only contains pages with sink (Page::DOM#data_flow_sinks or Page::DOM#execution_flow_sinks) data as populated by Arachni::Browser::Javascript#data_flow_sinks and Arachni::Browser::Javascript#execution_flow_sinks.

Returns:

See Also:



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# File 'lib/arachni/browser.rb', line 115

def page_snapshots_with_sinks
  @page_snapshots_with_sinks
end

#preloads ⇒ Hash (readonly)

Returns Preloaded resources, by URL.

Returns:

  • (Hash) —

    Preloaded resources, by URL.



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# File 'lib/arachni/browser.rb', line 94

def preloads
  @preloads
end

#proxy ⇒ Object (readonly)

Returns the value of attribute proxy.



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# File 'lib/arachni/browser.rb', line 96

def proxy
  @proxy
end

#selenium ⇒ Selenium::WebDriver::Driver (readonly)

Returns Selenium driver interface.

Returns:

  • (Selenium::WebDriver::Driver) —

    Selenium driver interface.



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# File 'lib/arachni/browser.rb', line 104

def selenium
  @selenium
end

#skip_states ⇒ Support::LookUp::HashSet (readonly)

Returns States that have been visited and should be skipped.

Returns:

See Also:

  • #skip_state
  • #skip_state?


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# File 'lib/arachni/browser.rb', line 125

def skip_states
  @skip_states
end

#transitions ⇒ Array<Page::DOM::Transition> (readonly)

Returns:



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# File 'lib/arachni/browser.rb', line 90

def transitions
  @transitions
end

#watir ⇒ Watir::Browser (readonly)

Returns Watir driver interface.

Returns:

  • (Watir::Browser) —

    Watir driver interface.



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# File 'lib/arachni/browser.rb', line 100

def watir
  @watir
end

Class Method Details

.add_asset_domain(url) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 160

def add_asset_domain( url )
    return if url.to_s.empty?
    return if !(curl = Arachni::URI( url ))
    return if !(domain = curl.domain)

    asset_domains << domain
    domain
end

.asset_domains ⇒ Object 



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# File 'lib/arachni/browser.rb', line 156

def asset_domains
    @asset_domains ||= Set.new
end

.executable ⇒ String

Returns Path to the PhantomJS executable.

Returns:

  • (String) —

    Path to the PhantomJS executable.



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# File 'lib/arachni/browser.rb', line 142

def executable
    @path ||= begin
        path = Selenium::WebDriver::Platform.find_binary('chromedriver')
        raise Error::MissingExecutable, 'chromedriver could not be found in PATH.' unless path
        Selenium::WebDriver::Platform.assert_executable path
        path
    end
end

.has_executable? ⇒ Bool

Returns true if a supported browser is in the OS PATH, false otherwise.

Returns:

  • (Bool) —

    true if a supported browser is in the OS PATH, false otherwise.



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# File 'lib/arachni/browser.rb', line 133

def has_executable?
    executable
    true
rescue Error::MissingExecutable
    false
end

.reset ⇒ Object

@ private



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# File 'lib/arachni/browser.rb', line 152

def reset
    @path = nil
end

Instance Method Details

#capture? ⇒ Bool

Returns true if request capturing is enabled, false otherwise.

Returns:

  • (Bool) —

    true if request capturing is enabled, false otherwise.

See Also:



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# File 'lib/arachni/browser.rb', line 763

def capture?
    !!@capture
end

#capture_snapshot(transition = nil) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 888

def capture_snapshot( transition = nil )
    pages = []

    request_transitions = flush_request_transitions
    transitions = ([transition] + request_transitions).flatten.compact

    window_handles = @selenium.window_handles

    begin
        window_handles.each do |handle|
            if window_handles.size > 1
                @selenium.switch_to.window( handle )
            end

            # We don't even have an HTTP response for the page, don't
            # bother trying anything else.
            next if !response

            unique_id = javascript.dom_event_digest
            already_seen = skip_state?( unique_id )
            skip_state unique_id

            with_sinks = javascript.has_sinks?

            # Avoid a #to_page call if at all possible because it'll generate
            # loads of data.
            next if (already_seen && !with_sinks) ||
                (page = to_page).code == 0

            if pages.empty?
                transitions.each do |t|
                    @transitions << t
                    page.dom.push_transition t
                end
            end

            capture_snapshot_with_sink( page )

            next if already_seen

            # Safegued against pages which generate an inf number of DOM
            # states regardless of UI interactions.
            transition_id ="#{page.dom.url}:#{page.dom.playable_transitions.map(&:hash)}"
            transition_id_seen = skip_state?( transition_id )
            skip_state transition_id
            next if transition_id_seen

            notify_on_new_page( page )

            if store_pages?
                @page_snapshots[unique_id] = page
                pages << page
            end
        end
    rescue => e
        print_debug "Could not capture snapshot for: #{@last_url}"

        if transition
            print_debug "-- #{transition}"
        end

        print_debug
        print_debug_exception e
    ensure
        @selenium.switch_to.default_content
    end

    pages
end

#captured_pages ⇒ Array<Page>

Returns Captured HTTP requests performed by the web page (AJAX etc.) converted into forms of pages to assist with analysis and audit.

Returns:

  • (Array<Page>) —

    Captured HTTP requests performed by the web page (AJAX etc.) converted into forms of pages to assist with analysis and audit.



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# File 'lib/arachni/browser.rb', line 777

def captured_pages
    @captured_pages
end

#clear_buffers ⇒ Object 



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# File 'lib/arachni/browser.rb', line 226

def clear_buffers
    synchronize do
        @preloads.clear
        @captured_pages.clear
        @page_snapshots.clear
        @page_snapshots_with_sinks.clear
        @window_responses.clear
    end
end

#cookies ⇒ Array<Cookie>

Returns Cookies visible to JS.

Returns:



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# File 'lib/arachni/browser.rb', line 984

def cookies
    js_cookies = begin
         # Watir doesn't tell us if cookies are HttpOnly, so we need to figure
         # this out ourselves, by checking for JS visibility.
        javascript.run( 'return document.cookie' )
    # We may not have a page.
    rescue Selenium::WebDriver::Error::WebDriverError
        ''
    end

    # The domain attribute cannot be trusted, PhantomJS thinks all cookies
    # are for subdomains too.
    # Do not try to hack around this because it'll be a waste of time,
    # leading to confusion and duplicate cookies.
    #
    # Still, we ask Selenium for cookies instead of parsing the JS ones
    # and merging with the HTTP cookiejar because this allows us to get
    # a path attribute for JS cookies.
    @selenium.manage.all_cookies.map do |c|

        c[:httponly] = !js_cookies.include?( c[:name].to_s )
        c[:path]     = c[:path].gsub( /\/+/, '/' )
        c[:expires]  = Time.parse( c[:expires].to_s ) if c[:expires]

        c[:raw_name]  = c[:name].to_s
        c[:raw_value] = c[:value].to_s

        c[:name]  = Cookie.decode( c[:name].to_s )
        c[:value] = Cookie.value_to_v0( c[:value].to_s )

        Cookie.new c.merge( url: @last_url || self.url )
    end
end

#distribute_event(resource, locator, event) ⇒ Object

Note:

Only used when running as part of Arachni::BrowserCluster to distribute page analysis across a pool of browsers.

Distributes the triggering of event on the element at element_index on page.

Parameters:



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# File 'lib/arachni/browser.rb', line 517

def distribute_event( resource, locator, event )
    trigger_event( resource, locator, event )
end

#dom_url ⇒ String

Returns Current URL, as provided by the browser.

Returns:

  • (String) —

    Current URL, as provided by the browser.



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# File 'lib/arachni/browser.rb', line 394

def dom_url
    @selenium.current_url
end

#each_element_with_events(whitelist = []) {|ElementLocator, Array<Symbol>| ... } ⇒ Object

Note:

Will skip non-visible elements as they can't be manipulated.

Iterates over all elements which have events and passes their info to the given block.

Yields:

  • (ElementLocator, Array<Symbol>) —

    Element locator along with the element's applicable events along with their handlers and attributes.



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# File 'lib/arachni/browser.rb', line 430

def each_element_with_events( whitelist = [])
    current_url = self.url

    javascript.each_dom_element_with_events whitelist do |element|
        tag_name   = element['tag_name']
        attributes = element['attributes']
        events     = element['events']

        case tag_name
            when 'a'
                href = attributes['href'].to_s

                if !href.empty?
                    if href.downcase.start_with?( 'javascript:' )
                        (events[:click] ||= []) << href
                    else
                        next if skip_path?( to_absolute( href, current_url ) )
                    end
                end

            when 'input'
                if attributes['type'].to_s.downcase == 'image'
                    (events[:click] ||= []) << 'image'
                end

            when 'form'
                action = attributes['action'].to_s

                if !action.empty?
                    if action.downcase.start_with?( 'javascript:' )
                        (events[:submit] ||= []) << action
                    else
                        next if skip_path?( to_absolute( action, current_url ) )
                    end
                end
        end

        next if events.empty?

        yield ElementLocator.new( tag_name: tag_name, attributes: attributes ),
                events
    end

    self
end

#explore_and_flush(depth = nil) ⇒ Array<Page>

Explores the browser's DOM tree and captures page snapshots for each state change until there are no more available.

Parameters:

  • depth (Integer) (defaults to: nil) —

    How deep to go into the DOM tree.

Returns:

  • (Array<Page>) —

    Page snapshots for each state.



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# File 'lib/arachni/browser.rb', line 406

def explore_and_flush( depth = nil )
    pages         = [ to_page ]
    current_depth = 0

    loop do
        bcnt   = pages.size
        pages |= pages.map { |p| load( p ).trigger_events.flush_pages }.flatten

        break if pages.size == bcnt || (depth && depth >= current_depth)

        current_depth += 1
    end

    pages.compact
end

#fire_event(element, event, options = {}) ⇒ Page::DOM::Transition, false

Triggers event on element.

Parameters:

Options Hash (options):

Returns:



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# File 'lib/arachni/browser.rb', line 560

def fire_event( element, event, options = {} )
    event   = event.to_s.downcase.sub( /^on/, '' ).to_sym
    locator = nil

    options[:inputs] = options[:inputs].my_stringify if options[:inputs]

    if element.is_a? ElementLocator
        locator = element

        begin
            Selenium::WebDriver::Wait.new( timeout: ELEMENT_APPEARANCE_TIMEOUT ).
                until { element = element.locate( self ) }

        rescue Selenium::WebDriver::Error::WebDriverError => e
            print_debug "Element '#{element.inspect}' could not be " <<
                            "located for triggering '#{event}'."
            print_debug
            print_debug_exception e
            return
        end
    end

    if locator
        opening_tag = locator.to_s
        tag_name    = locator.tag_name
    else
        opening_tag = element.opening_tag
        tag_name    = element.tag_name
        locator     = ElementLocator.from_html( opening_tag )
    end

    print_debug_level_2 "[start]: #{event} (#{options}) #{locator}"

    tag_name = tag_name.to_sym

    notify_on_fire_event( element, event )

    if Options.browser_cluster.wait_for_timers?
        pre_timeouts = javascript.timeouts
    end

    begin
        transition = Page::DOM::Transition.new( locator, event, options ) do
            force = true

            # It's better to use the helpers whenever possible instead of
            # firing events manually.
            if tag_name == :form
                fill_in_form_inputs( element, options[:inputs] )

                if event == :fill
                    force = false
                end

                if event == :submit
                    force = false

                    begin
                        element.find_elements( :css,
                            "input[type='submit'], button[type='submit']"
                        ).first.click
                    rescue => e
                        print_debug "No submit button, will trigger 'submit' event."
                        print_debug_exception e

                        element.submit
                    end
                end

            elsif event == :click
                force = false

                element.click

            elsif INPUT_EVENTS.include? event
                force = INPUT_EVENTS_TO_FORCE.include?( event )

                # Send keys will append to the existing value, so we need to
                # clear it first. The receiving input may not support values
                # though, so watch out.
                element.clear if [:input, :textarea].include?( tag_name )

                # Simulates real text input and will trigger associated events.
                # Except for INPUT_EVENTS_TO_FORCE of course.
                element.send_keys( (options[:value] || value_for( element )).to_s )
            end

            if force
                print_debug_level_2 "[forcing event]: #{event} (#{options}) #{locator}"
                fire_event_js locator, event
            end

            print_debug_level_2 "[waiting for requests]: #{event} (#{options}) #{locator}"
            wait_for_pending_requests
            print_debug_level_2 "[done waiting for requests]: #{event} (#{options}) #{locator}"

            # Maybe we switched to a different page, wait until the custom
            # JS env has been put in place.
            javascript.wait_till_ready
            javascript.set_element_ids

            update_cookies
        end

        print_debug_level_2 "[done in #{transition.time}s]: #{event} (#{options}) #{locator}"

        if Options.browser_cluster.wait_for_timers?
            delay = (javascript.timeouts - pre_timeouts).compact.map { |t| t[1].to_i }.max
            if delay
                print_debug_level_2 "Found new timers with max #{delay}ms."
                delay = [Options.http.request_timeout, delay].min / 1000.0

                print_debug_level_2 "Will wait for #{delay}s."
                sleep delay
            end
        end

        transition
    rescue Selenium::WebDriver::Error::WebDriverError => e

        print_debug "Error when triggering event for: #{dom_url}"
        print_debug "-- '#{event}' on: #{opening_tag} -- #{locator.css}"
        print_debug
        print_debug_exception e
        nil
    end
end

#fire_event_js(locator, event, wait: 0.1) ⇒ Object

This is essentially the same thing as Watir::Element#fire_event but 10 times faster.

Does not perform any sort of sanitization nor sanity checking, it will just try to trigger the event.

Parameters:

  • locator (Browser::ElementLocator)
  • event (Symbol, String)
  • wait (Numeric) (defaults to: 0.1) —

    Amount of time to wait (in seconds) after triggering the event.



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# File 'lib/arachni/browser.rb', line 698

def fire_event_js( locator, event, wait: 0.1 )
    r = javascript.run <<-EOJS
        var element = document.querySelector( #{locator.css.inspect} );

        // Could not be found.
        if( !element ) return false;

        // Invisible.
        if( element.offsetWidth <= 0 && element.offsetHeight <= 0 ) return false;

        var event = document.createEvent( "Events" );

        event.initEvent( "#{event}", true, true );

        event.view     = window;
        event.altKey   = false;
        event.ctrlKey  = false;
        event.shiftKey = false;
        event.metaKey  = false;
        event.keyCode  = 0;
        event.charCode = 'a';

        element.dispatchEvent( event );

        return true;
    EOJS

    sleep( wait ) if r

    r
end

#flush_page_snapshots_with_sinks ⇒ Array<Page>

Returns #page_snapshots_with_sinks and flushes it.

Returns:



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# File 'lib/arachni/browser.rb', line 960

def flush_page_snapshots_with_sinks
    @page_snapshots_with_sinks.dup
ensure
    @page_snapshots_with_sinks.clear
end

#flush_pages ⇒ Array<Page>

Returns Flushes and returns the captured and snapshot pages.

Returns:

See Also:



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# File 'lib/arachni/browser.rb', line 975

def flush_pages
    captured_pages + page_snapshots
ensure
    @captured_pages.clear
    @page_snapshots.clear
end

#goto(url, options = {}) ⇒ Page::DOM::Transition

Returns Transition used to replay the resource visit.

Parameters:

  • url (String) —

    Loads the given URL in the browser.

  • options (Hash) (defaults to: {})
  • [Bool] (Hash) —

    a customizable set of options

  • [Array<Cookie>] (Hash) —

    a customizable set of options

Returns:



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# File 'lib/arachni/browser.rb', line 315

def goto( url, options = {} )
    take_snapshot      = options.include?(:take_snapshot) ?
        options[:take_snapshot] : true
    extra_cookies      = options[:cookies] || {}
    update_transitions = options.include?(:update_transitions) ?
        options[:update_transitions] : true

    pre_add_request_transitions = @add_request_transitions
    if !update_transitions
        @add_request_transitions = false
    end

    @last_url = Arachni::URI( url ).to_s
    self.class.add_asset_domain @last_url

    ensure_open_window

    load_cookies url, extra_cookies

    transition = Page::DOM::Transition.new( :page, :load,
        url:     url,
        cookies: extra_cookies
    ) do
        print_debug_level_2 "Loading #{url} ..."
        @selenium.navigate.to url
        print_debug_level_2 '...done.'

        wait_till_ready

        Options.browser_cluster.css_to_wait_for( url ).each do |css|
            print_info "Waiting for #{css.inspect} to appear for: #{url}"

            begin
                Selenium::WebDriver::Wait.new(
                    timeout: Options.browser_cluster.job_timeout
                ).until { @selenium.find_element( :css, css ) }

                print_info "#{css.inspect} appeared for: #{url}"
            rescue Selenium::WebDriver::Error::TimeoutError
                print_bad "#{css.inspect} did not appear for: #{url}"
            end

        end

        javascript.set_element_ids
    end

    if @add_request_transitions
        @transitions << transition
    end

    @add_request_transitions = pre_add_request_transitions

    update_cookies

    # Capture the page at its initial state.
    capture_snapshot if take_snapshot

    transition
end

#inspect ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1164

def inspect
    s = "#<#{self.class} "
    s << "last-url=#{@last_url.inspect} "
    s << "transitions=#{@transitions.size}"
    s << '>'
end

#load(resource, options = {}) ⇒ Browser

Returns self.

Parameters:

  • resource (String, HTTP::Response, Page, Page:::DOM) —

    Loads the given resource in the browser. If it is a string it will be treated like a URL.

Returns:



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# File 'lib/arachni/browser.rb', line 250

def load( resource, options = {} )

    case resource
        when String
            @transitions = []
            goto resource, options

        when HTTP::Response
            @transitions = []
            goto preload( resource ), options

        when Page
            HTTP::Client.update_cookies resource.cookie_jar

            load resource.dom

        when Page::DOM
            @transitions = resource.transitions.dup
            update_skip_states resource.skip_states

            @add_request_transitions = false if @transitions.any?
            resource.restore self
            @add_request_transitions = true

        else
            fail Error::Load,
                 "Can't load resource of type #{resource.class}."
    end

    self
end

#load_delay ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1028

def load_delay
    @javascript.timeouts.compact.map { |t| t[1].to_i }.max
end

#on_fire_event(&block) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 30

advertise :on_fire_event

#on_new_page(&block) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 33

advertise :on_new_page

#on_new_page_with_sink(&block) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 36

advertise :on_new_page_with_sink

#on_response(&block) ⇒ Object 



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# File 'lib/arachni/browser.rb', line 39

advertise :on_response

#page_snapshots ⇒ Array<Page>

Returns Page snapshots (stored after events have been fired and JS links clicked) with hashes as keys and pages as values.

Returns:

  • (Array<Page>) —

    Page snapshots (stored after events have been fired and JS links clicked) with hashes as keys and pages as values.



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# File 'lib/arachni/browser.rb', line 770

def page_snapshots
    @page_snapshots.values
end

#preload(resource) ⇒ Object

Note:

The preloaded resource will be removed once used.

Parameters:



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# File 'lib/arachni/browser.rb', line 286

def preload( resource )
    response =  case resource
                    when HTTP::Response
                        resource

                    when Page
                        resource.response

                    else
                        fail Error::Load,
                             "Can't preload resource of type #{resource.class}."
                end

    save_response( response ) if !response.url.include?( request_token )

    @preloads[response.url] = response
    response.url
end

#response ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1048

def response
    u = dom_url

    if u == 'about:blank'
        print_debug 'Blank page.'
        return
    end

    if skip_path?( u )
        print_debug "Response is out of scope: #{u}"
        return
    end

    r = get_response( u )

    return r if r && r.code != 504

    if r
        print_debug "Origin server timed-out when requesting: #{u}"
    else
        print_debug "Response never arrived for: #{u}"

        print_debug 'Available responses are:'
        @window_responses.each do |k, _|
            print_debug "-- #{k}"
        end

        print_debug 'Tried:'
        print_debug "-- #{u}"
        print_debug "-- #{normalize_url( u )}"
        print_debug "-- #{normalize_watir_url( u )}"
    end

    nil
end

#shutdown ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1128

def shutdown
    print_debug 'Shutting down...'

    if @selenium
        @selenium.close

        print_debug_level_2 'Quiting Selenium...'
        # So freaking hacky but @selenium.quit freezes if we don't detach first.
        @selenium.instance_eval do
            bridge.quit

            @service.instance_eval do
                Process.detach @process.pid
                @process.stop
            end
        end

        @selenium.quit rescue Errno::ECONNREFUSED
        # @selenium.quit rescue Selenium::WebDriver::Error::WebDriverError
        print_debug_level_2 '...done.'

    end

    if @proxy
        print_debug_level_2 'Shutting down proxy...'
        @proxy.shutdown rescue Reactor::Error::NotRunning
        print_debug_level_2 '...done.'
    end

    @proxy    = nil
    @watir    = nil
    @selenium = nil

    print_debug '...shutdown complete.'
end

#skip_path?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arachni/browser.rb', line 1044

def skip_path?( path )
    enforce_scope? && super( path )
end

#source ⇒ String

Returns HTML code of the evaluated (DOM/JS/AJAX) page.

Returns:

  • (String) —

    HTML code of the evaluated (DOM/JS/AJAX) page.



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# File 'lib/arachni/browser.rb', line 1024

def source
    @selenium.page_source
end

#source_with_line_numbers ⇒ String

Returns Prefixes each source line with a number.

Returns:

  • (String) —

    Prefixes each source line with a number.



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# File 'lib/arachni/browser.rb', line 238

def source_with_line_numbers
    source.lines.map.with_index do |line, i|
        "#{i+1} - #{line}"
    end.join
end

#start_capture ⇒ Browser

Starts capturing requests and parses them into elements of pages, accessible via #captured_pages.

Returns:

See Also:



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# File 'lib/arachni/browser.rb', line 740

def start_capture
    @capture = true
    self
end

#state ⇒ Page::DOM

Returns:



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# File 'lib/arachni/browser.rb', line 782

def state
    d_url = dom_url

    return if !response

    Page::DOM.new(
        url:         d_url,
        transitions: @transitions.dup,
        digest:      @javascript.dom_digest,
        skip_states: skip_states.dup
    )
end

#stop_capture ⇒ Browser

Stops the HTTP::Request capture.

Returns:

See Also:



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# File 'lib/arachni/browser.rb', line 753

def stop_capture
    @capture = false
    self
end

#to_page ⇒ Page

Returns Converts the current browser window to a page.

Returns:

  • (Page) —

    Converts the current browser window to a page.



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# File 'lib/arachni/browser.rb', line 797

def to_page
    d_url = dom_url

    if !(r = response)
        return Page.from_data(
            dom: {
                url: d_url
            },
            response: {
                code: 0,
                url:  url
            }
        )
    end

    # We need sink data for both the current taint and to determine cookie
    # usage, so grab all of the data-flow sinks once.
    data_flow_sinks = {}
    if @javascript.supported?
        data_flow_sinks = @javascript.taint_tracer.data_flow_sinks
    end

    page                          = r.to_page
    page.body                     = source
    page.dom.url                  = d_url
    page.dom.cookies              = self.cookies
    page.dom.digest               = @javascript.dom_digest
    page.dom.execution_flow_sinks = @javascript.execution_flow_sinks
    page.dom.data_flow_sinks      = data_flow_sinks[@javascript.taint] || []
    page.dom.transitions          = @transitions.dup
    page.dom.skip_states          = skip_states.dup

    if Options.audit.ui_inputs?
        page.ui_inputs = Element::UIInput.from_browser( self, page )
    end

    if Options.audit.ui_forms?
        page.ui_forms = Element::UIForm.from_browser( self, page )
    end

    # Go through auditable DOM forms and cookies and remove the DOM from
    # them if no events are associated with it.
    #
    # This can save **A LOT** of time during the audit.
    if @javascript.supported?
        if Options.audit.form_doms?
            page.forms.each do |form|
                next if !form.node || !form.dom

                action = form.node['action'].to_s
                form.dom.browser = self

                next if action.downcase.start_with?( 'javascript:' ) ||
                    form.dom.locate.events.any?

                form.skip_dom = true
            end

            page.update_metadata
            page.clear_cache
        end

        if Options.audit.cookie_doms?
            page.cookies.each do |cookie|
                if (sinks = data_flow_sinks[cookie.name] ||
                    data_flow_sinks[cookie.value])

                    # Don't be satisfied with just a taint match, make sure
                    # the full value is identical.
                    #
                    # For example, if a cookie has '1' as a name or value
                    # that's too generic and can match irrelevant data.
                    #
                    # The current approach isn't perfect of course, but it's
                    # the best we can do.
                    next if sinks.find do |sink|
                        sink.tainted_value == cookie.name ||
                            sink.tainted_value == cookie.value
                    end
                end

                cookie.skip_dom = true
            end

            page.update_metadata
        end
    end

    page
end

#trigger_event(resource, element, event, restore = true) ⇒ Object

Note:

Captures page #page_snapshots.

Triggers event on the element described by tag on page.

Parameters:



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# File 'lib/arachni/browser.rb', line 530

def trigger_event( resource, element, event, restore = true )
    transition = fire_event( element, event )

    if !transition
        print_info "Could not trigger '#{event}' on: #{element}"

        if restore
            print_info 'Restoring page.'
            restore( resource )
        end

        return
    end

    capture_snapshot( transition )
    restore( resource ) if restore
end

#trigger_events ⇒ Browser

Triggers all events on all elements (once) and captures page snapshots.

Returns:



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# File 'lib/arachni/browser.rb', line 481

def trigger_events
    dom = self.state
    return self if !dom

    url = normalize_url( dom.url )

    count = 1
    each_element_with_events do |locator, events|
        state = "#{url}:#{locator.tag_name}:#{locator.attributes}:#{events.keys.sort}"
        next if skip_state?( state )
        skip_state state

        events.each do |name, _|
            if Options.scope.dom_event_limit_reached?( count )
                print_debug "DOM event limit reached for: #{dom.url}"
                next
            end

            distribute_event( dom, locator, name.to_sym )

            count += 1
        end
    end

    self
end

#update_cookies ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1018

def update_cookies
    HTTP::Client.update_cookies self.cookies
end

#url ⇒ String

Returns Current URL, noralized via #URI.

Returns:

  • (String) —

    Current URL, noralized via #URI



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# File 'lib/arachni/browser.rb', line 388

def url
    normalize_url dom_url
end

#wait_for_timers ⇒ Object 



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# File 'lib/arachni/browser.rb', line 1032

def wait_for_timers
    delay = load_delay
    return if !delay

    effective_delay = [Options.http.request_timeout, delay].min / 1000.0
    print_debug_level_2 "Waiting for max timer #{effective_delay}s (original was #{delay}ms)..."

    sleep effective_delay

    print_debug_level_2 '...done.'
end

#wait_till_ready ⇒ Object 



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# File 'lib/arachni/browser.rb', line 376

def wait_till_ready
    @javascript.wait_till_ready

    if Options.browser_cluster.wait_for_timers?
        wait_for_timers
    end

    wait_for_pending_requests
end