Class: Brakeman::CheckBasicAuth

Inherits:
BaseCheck show all
Defined in:
lib/brakeman/checks/check_basic_auth.rb

Overview

Checks if password is stored in controller when using http_basic_authenticate_with

Only for Rails >= 3.1

Constant Summary

Constants inherited from BaseCheck

BaseCheck::CONFIDENCE

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 BaseCheck

#tracker, #warnings

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods inherited from BaseCheck

#add_result, inherited, #initialize, #process_cookies, #process_default, #process_dstr, #process_if, #process_params

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, #initialize, #process, processors, #scope

Constructor Details

This class inherits a constructor from Brakeman::BaseCheck

Instance Method Details

#check_basic_auth_filter ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 19

def check_basic_auth_filter
  controllers = tracker.controllers.select do |_name, c|
    c.options[:http_basic_authenticate_with]
  end

  Hash[controllers].each do |name, controller|
    controller.options[:http_basic_authenticate_with].each do |call|

      if pass = get_password(call) and string? pass
        warn :controller => name,
            :warning_type => "Basic Auth",
            :warning_code => :basic_auth_password,
            :message => "Basic authentication password stored in source code",
            :code => call,
            :confidence => :high,
            :file => controller.file
        break
      end
    end
  end
end

#check_basic_auth_request ⇒ Object

Look for

authenticate_or_request_with_http_basic do |username, password|
  username == "foo" && password == "bar"
end



45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 45

def check_basic_auth_request
  tracker.find_call(:target => nil, :method => :authenticate_or_request_with_http_basic).each do |result|
    if include_password_literal? result
        warn :result => result,
            :code => @include_password,
            :warning_type => "Basic Auth",
            :warning_code => :basic_auth_password,
            :message => "Basic authentication password stored in source code",
            :confidence => :high
    end
  end
end

#get_password(call) ⇒ Object 



81
82
83
84
85
86
87
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 81

def get_password call
  arg = call.first_arg

  return false if arg.nil? or not hash? arg

  hash_access(arg, :password)
end

#include_password_literal?(result) ⇒ Boolean

Check if the block of a result contains a comparison of password to string

Returns:

  • (Boolean) 


59
60
61
62
63
64
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 59

def include_password_literal? result
  @password_var = result[:block_args].last
  @include_password = false
  process result[:block]
  @include_password
end

#process_call(exp) ⇒ Object

Looks for :== calls on password var



67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 67

def process_call exp
  target = exp.target

  if node_type?(target, :lvar) and
    target.value == @password_var and
    exp.method == :== and
    string? exp.first_arg

    @include_password = exp
  end

  exp
end

#run_check ⇒ Object 



12
13
14
15
16
17
 
# File 'lib/brakeman/checks/check_basic_auth.rb', line 12

def run_check
  return if version_between? "0.0.0", "3.0.99"

  check_basic_auth_filter
  check_basic_auth_request
end