Class: TaintedLove::Replacer::ReplaceRailsUserInput

Inherits:
Base
  • Object
show all
Defined in:
lib/tainted_love/replacer/replace_rails_user_input.rb

Overview

Ensures user input is tainted in Rails

Instance Method Summary collapse

Methods inherited from Base

replacers

Instance Method Details

#replace! ⇒ Object 



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# File 'lib/tainted_love/replacer/replace_rails_user_input.rb', line 11

def replace!

  # taint the values loaded from the database
  if Object.const_defined?('ActiveRecord::Base')
    ActiveRecord::Base.after_find do
      attributes.each do |key, value|
        TaintedLove.tag(value.taint, source: "ActiveRecord attribute #{self.class.to_s}##{key}", value: value)
      end
    end
  end

  TaintedLove.proxy_method('ActionDispatch::Http::Headers', :[]) do |return_value, *args|
    TaintedLove.tag(return_value.taint, source: "headers[#{args.first.inspect}]", value: return_value)
  end

  # taint params keys
  if Object.const_defined?('ActionController::Parameters')
    ActionController::Parameters.class_eval do
      def keys
        @parameters.keys.map { |key|
          TaintedLove.tag(key.dup.taint, source: "Parameter name #{key.inspect}", value: key)
        }
      end
    end
  end

  # Transfer tags from String to SafeBuffer
  TaintedLove.proxy_method('ActiveSupport::SafeBuffer', :initialize) do |return_value, str|
    return_value.tainted_love_tags = str.tainted_love_tags
  end
end

#should_replace? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tainted_love/replacer/replace_rails_user_input.rb', line 7

def should_replace?
  Object.const_defined?('Rails')
end