Class: Brakeman::TemplateAliasProcessor

Inherits:
AliasProcessor show all
Includes:
RenderHelper
Defined in:
lib/brakeman/processors/template_alias_processor.rb

Overview

Processes aliasing in templates. Handles calls to render.

Constant Summary collapse

FORM_METHODS = 
Set[:form_for, :remote_form_for, :form_remote_for]
UNKNOWN_MODEL_CALL = 
Sexp.new(:call, Sexp.new(:const, Brakeman::Tracker::UNKNOWN_MODEL), :new)
FORM_BUILDER_CALL = 
Sexp.new(:call, Sexp.new(:const, :FormBuilder), :new)
COLLECTION_METHODS = 
[:all, :find, :select, :where]

Constants inherited from AliasProcessor

AliasProcessor::ARRAY_CONST, AliasProcessor::HASH_CONST, AliasProcessor::RAILS_TEST

Constants included from Util

Util::ALL_COOKIES, Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_COOKIES, 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 AliasProcessor

#result, #tracker

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods included from RenderHelper

#get_class_target, #get_options, #process_action, #process_layout, #process_partial, #process_render

Methods inherited from AliasProcessor

#array_detect_all_literals?, #array_include_all_literals?, #assign_args, #collapse_send_call, #duplicate?, #early_return?, #find_method, #get_call_value, #get_rhs, #join_arrays, #join_strings, #merge_if_branch, #meth_env, #only_ivars, #only_request_vars, #process_array_access, #process_attrasgn, #process_block, #process_bracket_call, #process_call, #process_case, #process_cdecl, #process_cvdecl, #process_default, #process_defn, #process_defs, #process_gasgn, #process_hash_access, #process_hash_merge, #process_hash_merge!, #process_helper_method, #process_iasgn, #process_if, #process_if_branch, #process_lasgn, #process_masgn, #process_op_asgn1, #process_op_asgn2, #process_or_simple_operation, #process_or_target, #process_safely, #process_scope, #process_svalue, #raise?, #replace, #same_value?, #self_assign?, #self_assign_target?, #self_assign_var?, #set_value, #simple_when?, #too_deep?, #top_target, #value_from_case, #value_from_if

Methods included from Util

#array?, #block?, #call?, #camelize, #class_name, #constant?, #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, #rails_version, #regexp?, #relative_path, #request_env?, #request_value?, #result?, #set_env_defaults, #sexp?, #string?, #string_interp?, #symbol?, #table_to_csv, #template_path_to_name, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#current_file_name, #process_all, #process_all!, #process_call_args, #process_call_defn?, #process_class, #process_module

Methods inherited from SexpProcessor

#in_context, #process, processors, #scope

Constructor Details

#initialize(tracker, template, called_from = nil) ⇒ TemplateAliasProcessor

Returns a new instance of TemplateAliasProcessor.



14
15
16
17
18
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 14

def initialize tracker, template, called_from = nil
  super tracker
  @template = template
  @called_from = called_from
end

Instance Method Details

#find_push_target(exp) ⇒ Object

Ignore ‘<<` calls on template variables which are used by the templating library (HAML, ERB, etc.)



103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 103

def find_push_target exp
  if sexp? exp
    if exp.node_type == :lvar and (exp.value == :_buf or exp.value == :_erbout)
      return nil
    elsif exp.node_type == :ivar and exp.value == :@output_buffer
      return nil
    elsif exp.node_type == :call and call? exp.target and
      exp.target.method == :_hamlout and exp.method == :buffer

      return nil
    end
  end

  super
end

#get_model_target(exp) ⇒ Object

Checks if exp is a call to Model.all or Model.find*



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 85

def get_model_target exp
  if call? exp
    target = exp.target

    if COLLECTION_METHODS.include? exp.method or exp.method.to_s[0,4] == "find"
      models = Set.new @tracker.models.keys
      name = class_name target
      return target if models.include?(name)
    end

    return get_model_target(target)
  end

  false
end

#process_iter(exp) ⇒ Object

Looks for form methods and iterating over collections of Models



48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 48

def process_iter exp
  process_default exp

  call = exp.block_call

  if call? call
    target = call.target
    method = call.method
    arg = exp.block_args.first_param
    block = exp.block

    #Check for e.g. Model.find.each do ... end
    if method == :each and arg and block and model = get_model_target(target)
      if arg.is_a? Symbol
        if model == target.target
          env[Sexp.new(:lvar, arg)] = Sexp.new(:call, model, :new)
        else
          env[Sexp.new(:lvar, arg)] = UNKNOWN_MODEL_CALL
        end

        process block if sexp? block
      end
    elsif FORM_METHODS.include? method
      if arg.is_a? Symbol
        env[Sexp.new(:lvar, arg)] = FORM_BUILDER_CALL

        process block if sexp? block
      end
    end
  end

  exp
end

#process_template(name, args, _, line = nil, file_name = nil) ⇒ Object

Process template



21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 21

def process_template name, args, _, line = nil, file_name = nil
  @file_name = file_name || relative_path(@template.file || @tracker.templates[@template.name])

  if @called_from
    if @called_from.include_template? name
      Brakeman.debug "Skipping circular render from #{@template.name} to #{name}"
      return
    end

    super name, args, @called_from.dup.add_template_render(@template.name, line, @file_name)
  else
    super name, args, Brakeman::RenderPath.new.add_template_render(@template.name, line, @file_name)
  end
end

#template_name(name) ⇒ Object

Determine template name



37
38
39
40
41
42
 
# File 'lib/brakeman/processors/template_alias_processor.rb', line 37

def template_name name
  if !name.to_s.include?('/') && @template.name.to_s.include?('/')
    name = "#{@template.name.to_s.match(/^(.*\/).*$/)[1]}#{name}"
  end
  name
end