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 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/tainted_love/replacer/replace_rails_user_input.rb', line 11

def replace!
  # taint headers
  TaintedLove.proxy_method('ActionDispatch::Http::Headers', :[]) do |return_value, *_args|
    return_value.taint
  end

  # taint the values loaded from the database
  if Object.const_defined?('ActiveRecord::Base')
    ActiveRecord::Base.after_find do
      attributes.values.each do |value|
        value.taint unless value.frozen?
      end
    end
  end

  if Object.const_defined?('ActionController::Base')
    ActionController::Base.class_eval do
      before_action :taint_params
      before_action :taint_cookies

      private

      def taint_params(value = params)
        if value.is_a?(ActionController::Parameters) || value.is_a?(ActiveSupport::HashWithIndifferentAccess)
          value.values.map { |x| x.taint unless x.frozen? }
          value.values.each { |x| taint_params(x) }
        else
          value.taint unless value.frozen?
        end
      end

      def taint_cookies
        request.cookies.values.each(&:taint)
      end
    end
  end

  # taint params keys
  if Object.const_defined?('ActionController::Parameters')
    ActionController::Parameters.class_eval do
      def keys
        @parameters.keys.map { |key| key.dup.taint }
      end
    end
  end
end

#should_replace? ⇒ Boolean

Returns:

  • (Boolean) 


7
8
9
 
# File 'lib/tainted_love/replacer/replace_rails_user_input.rb', line 7

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