Class: Brakeman::GemProcessor

Inherits:
BasicProcessor show all
Defined in:
lib/brakeman/processors/gem_processor.rb

Overview

Processes Gemfile and Gemfile.lock

Constant Summary

Constants included from Util

Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_ENV, Util::REQUEST_PARAMETERS, Util::REQUEST_PARAMS, Util::SESSION, Util::SESSION_SEXP

Constants inherited from SexpProcessor

SexpProcessor::VERSION

Instance Attribute Summary

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods inherited from BasicProcessor

#process_default

Methods included from Util

#array?, #block?, #call?, #camelize, #contains_class?, #context_for, #cookies?, #false?, #file_by_name, #file_for, #github_url, #hash?, #hash_access, #hash_insert, #hash_iterate, #integer?, #make_call, #node_type?, #number?, #params?, #pluralize, #regexp?, #relative_path, #request_env?, #request_value?, #result?, #set_env_defaults, #sexp?, #string?, #symbol?, #table_to_csv, #template_path_to_name, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#class_name, #process_all, #process_all!, #process_call_args, #process_class, #process_module

Methods inherited from SexpProcessor

#error_handler, #in_context, #process, #process_dummy, #scope

Constructor Details

#initialize(*args) ⇒ GemProcessor

Returns a new instance of GemProcessor.


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# File 'lib/brakeman/processors/gem_processor.rb', line 6

def initialize *args
  super
  @gem_name_version = /^\s*([-_+.A-Za-z0-9]+) \((\w(\.\w+)*)\)/
  @tracker.config[:gems] ||= {}
end

Instance Method Details

#process_call(exp) ⇒ Object


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# File 'lib/brakeman/processors/gem_processor.rb', line 42

def process_call exp
  if exp.target == nil and exp.method == :gem
    gem_name = exp.first_arg
    return exp unless string? gem_name

    gem_version = exp.second_arg

    if string? gem_version
      @tracker.config[:gems][gem_name.value.to_sym] = { :version => gem_version.value.to_s, :file => 'Gemfile', :line => exp.line }
    else
      @tracker.config[:gems][gem_name.value.to_sym] = { :version => nil, :file => 'Gemfile' , :line => exp.line }
    end
  end

  exp
end

#process_gem_lock(gem_lock) ⇒ Object


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# File 'lib/brakeman/processors/gem_processor.rb', line 59

def process_gem_lock gem_lock
  line_num = 1
  gem_lock.each_line do |line|
    set_gem_version_and_file line, 'Gemfile.lock', line_num
    line_num += 1
  end
end

#process_gems(src, gem_lock = nil) ⇒ Object


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# File 'lib/brakeman/processors/gem_processor.rb', line 12

def process_gems src, gem_lock = nil
  process src

  if gem_lock
    process_gem_lock gem_lock
    @tracker.config[:rails_version] = @tracker.config[:gems][:rails][:version] if @tracker.config[:gems][:rails]
  elsif @tracker.config[:gems] && @tracker.config[:gems][:rails] && @tracker.config[:gems][:rails][:version] =~ /(\d+.\d+.\d+)/
    @tracker.config[:rails_version] = $1
  else
    @tracker.config[:rails_version] = nil
  end

  if @tracker.options[:rails3].nil? and @tracker.options[:rails4].nil? and @tracker.config[:rails_version]
    if @tracker.config[:rails_version].start_with? "3"
      @tracker.options[:rails3] = true
      Brakeman.notify "[Notice] Detected Rails 3 application"
    elsif @tracker.config[:rails_version].start_with? "4"
      @tracker.options[:rails3] = true
      @tracker.options[:rails4] = true
      Brakeman.notify "[Notice] Detected Rails 4 application"
    end
  end

  if @tracker.config[:gems][:rails_xss]
    @tracker.config[:escape_html] = true

    Brakeman.notify "[Notice] Escaping HTML by default"
  end
end

#set_gem_version_and_file(line, file, line_num) ⇒ Object

Supports .rc2 but not ~>, >=, or <=


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# File 'lib/brakeman/processors/gem_processor.rb', line 68

def set_gem_version_and_file line, file, line_num
  if line =~ @gem_name_version
    @tracker.config[:gems][$1.to_sym] = { :version => $2, :file => file, :line => line_num }
  end
end