Class: Brakeman::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/brakeman/scanner.rb

Overview

Scans the Rails application.

Direct Known Subclasses

Rescanner

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options, processor = nil) ⇒ Scanner

Pass in path to the root of the Rails application



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

def initialize options, processor = nil
  @options = options
  @app_tree = Brakeman::AppTree.from_options(options)

  if (!@app_tree.root || !@app_tree.exists?("app")) && !options[:force_scan]
    message = "Please supply the path to a Rails application (looking in #{@app_tree.root}).\n" <<
              "  Use `--force` to run a scan anyway."

    raise Brakeman::NoApplication, message
  end

  @processor = processor || Brakeman::Processor.new(@app_tree, options)
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



19
20
21
 
# File 'lib/brakeman/scanner.rb', line 19

def options
  @options
end

Instance Method Details

#detect_file_types ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
 
# File 'lib/brakeman/scanner.rb', line 90

def detect_file_types
  @file_list = {
    controllers: [],
    initializers: [],
    libs: [],
    models: [],
    templates: [],
  }

  detector = Brakeman::FileTypeDetector.new

  @parsed_files.each do |file|
    if file.is_a? Brakeman::TemplateParser::TemplateFile
      @file_list[:templates] << file
    else
      type = detector.detect_type(file)
      unless type == :skip
        if @file_list[type].nil?
          raise type.to_s
        else
          @file_list[type] << file
        end
      end
    end
  end
end

#guess_rails_version ⇒ Object

Set :rails3/:rails4 option if version was not determined from Gemfile



193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
 
# File 'lib/brakeman/scanner.rb', line 193

def guess_rails_version
  unless tracker.options[:rails3] or tracker.options[:rails4]
    if @app_tree.exists?("script/rails")
      tracker.options[:rails3] = true
      Brakeman.notify "[Notice] Detected Rails 3 application"
    elsif @app_tree.exists?("app/channels")
      tracker.options[:rails3] = true
      tracker.options[:rails4] = true
      tracker.options[:rails5] = true
      Brakeman.notify "[Notice] Detected Rails 5 application"
    elsif not @app_tree.exists?("script")
      tracker.options[:rails3] = true
      tracker.options[:rails4] = true
      Brakeman.notify "[Notice] Detected Rails 4 application"
    end
  end
end

#index_call_sites ⇒ Object 



349
350
351
 
# File 'lib/brakeman/scanner.rb', line 349

def index_call_sites
  tracker.index_call_sites
end

#parse_files ⇒ Object 



73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/brakeman/scanner.rb', line 73

def parse_files
  fp = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout])

  fp.parse_files tracker.app_tree.ruby_file_paths

  template_parser = Brakeman::TemplateParser.new(tracker, fp)

  fp.read_files(@app_tree.template_paths) do |path, contents|
    template_parser.parse_template path, contents
  end

  # Collect errors raised during parsing
  tracker.add_errors(fp.errors)

  @parsed_files = fp.file_list
end

#parse_ruby_file(file) ⇒ Object 



353
354
355
356
 
# File 'lib/brakeman/scanner.rb', line 353

def parse_ruby_file file
  fp = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout])
  fp.parse_ruby(file.read, file)
end

#process ⇒ Object

Process everything in the Rails application



42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
 
# File 'lib/brakeman/scanner.rb', line 42

def process
  Brakeman.notify "Processing gems..."
  process_gems
  guess_rails_version
  Brakeman.notify "Processing configuration..."
  process_config
  Brakeman.notify "Parsing files..."
  parse_files
  Brakeman.notify "Detecting file types..."
  detect_file_types
  Brakeman.notify "Processing initializers..."
  process_initializers
  Brakeman.notify "Processing libs..."
  process_libs
  Brakeman.notify "Processing routes...          "
  process_routes
  Brakeman.notify "Processing templates...       "
  process_templates
  Brakeman.notify "Processing data flow in templates..."
  process_template_data_flows
  Brakeman.notify "Processing models...          "
  process_models
  Brakeman.notify "Processing controllers...     "
  process_controllers
  Brakeman.notify "Processing data flow in controllers..."
  process_controller_data_flows
  Brakeman.notify "Indexing call sites...        "
  index_call_sites
  tracker
end

#process_config ⇒ Object

Process config/environment.rb and config/gems.rb

Stores parsed information in tracker.config



120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
 
# File 'lib/brakeman/scanner.rb', line 120

def process_config
  # Sometimes folks like to put constants in environment.rb
  # so let's always process it even for newer Rails versions
  process_config_file "environment.rb"

  if options[:rails3] or options[:rails4] or options[:rails5] or options[:rails6]
    process_config_file "application.rb"
    process_config_file "environments/production.rb"
  else
    process_config_file "gems.rb"
  end

  if @app_tree.exists?("vendor/plugins/rails_xss") or
    options[:rails3] or options[:escape_html]

    tracker.config.escape_html = true
    Brakeman.notify "[Notice] Escaping HTML by default"
  end

  if @app_tree.exists? ".ruby-version"
    tracker.config.set_ruby_version @app_tree.file_path(".ruby-version").read
  end

  tracker.config.load_rails_defaults
end

#process_controller(astfile) ⇒ Object 



287
288
289
290
291
292
293
 
# File 'lib/brakeman/scanner.rb', line 287

def process_controller astfile
  begin
    @processor.process_controller(astfile.ast, astfile.path)
  rescue => e
    tracker.error e.exception(e.message + "\nWhile processing #{astfile.path}"), e.backtrace
  end
end

#process_controller_data_flows ⇒ Object 



273
274
275
276
277
278
279
280
281
282
283
284
285
 
# File 'lib/brakeman/scanner.rb', line 273

def process_controller_data_flows
  controllers = tracker.controllers.sort_by { |name, _| name.to_s }

  track_progress controllers, "controllers" do |name, controller|
    Brakeman.debug "Processing #{name}"
    controller.src.each do |file, src|
      @processor.process_controller_alias name, src, nil, file
    end
  end

  #No longer need these processed filter methods
  tracker.filter_cache.clear
end

#process_controllers ⇒ Object

Process all .rb files in controllers/

Adds processed controllers to tracker.controllers



266
267
268
269
270
271
 
# File 'lib/brakeman/scanner.rb', line 266

def process_controllers
  track_progress @file_list[:controllers] do |controller|
    Brakeman.debug "Processing #{controller.path}"
    process_controller controller
  end
end

#process_gems ⇒ Object

Process Gemfile



161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
 
# File 'lib/brakeman/scanner.rb', line 161

def process_gems
  gem_files = {}

  if @app_tree.exists? "Gemfile"
    file = @app_tree.file_path("Gemfile")
    gem_files[:gemfile] = { :src => parse_ruby_file(file), :file => file }
  elsif @app_tree.exists? "gems.rb"
    file = @app_tree.file_path("gems.rb")
    gem_files[:gemfile] = { :src => parse_ruby_file(file), :file => file }
  end

  if @app_tree.exists? "Gemfile.lock"
    file = @app_tree.file_path("Gemfile.lock")
    gem_files[:gemlock] = { :src => file.read, :file => file }
  elsif @app_tree.exists? "gems.locked"
    file = @app_tree.file_path("gems.locked")
    gem_files[:gemlock] = { :src => file.read, :file => file }
  end

  if @app_tree.gemspec
    gem_files[:gemspec] = { :src => parse_ruby_file(@app_tree.gemspec), :file => @app_tree.gemspec }
  end

  if not gem_files.empty?
    @processor.process_gems gem_files
  end
rescue => e
  Brakeman.notify "[Notice] Error while processing Gemfile."
  tracker.error e.exception(e.message + "\nWhile processing Gemfile"), e.backtrace
end

#process_initializer(init) ⇒ Object

Process an initializer



222
223
224
 
# File 'lib/brakeman/scanner.rb', line 222

def process_initializer init
  @processor.process_initializer(init.path, init.ast)
end

#process_initializers ⇒ Object

Process all the .rb files in config/initializers/

Adds parsed information to tracker.initializers



214
215
216
217
218
219
 
# File 'lib/brakeman/scanner.rb', line 214

def process_initializers
  track_progress @file_list[:initializers] do |init|
    Brakeman.debug "Processing #{init[:path]}"
    process_initializer init
  end
end

#process_lib(lib) ⇒ Object

Process a library



242
243
244
 
# File 'lib/brakeman/scanner.rb', line 242

def process_lib lib
  @processor.process_lib lib.ast, lib.path
end

#process_libs ⇒ Object

Process all .rb in lib/

Adds parsed information to tracker.libs.



229
230
231
232
233
234
235
236
237
238
239
 
# File 'lib/brakeman/scanner.rb', line 229

def process_libs
  if options[:skip_libs]
    Brakeman.notify '[Skipping]'
    return
  end

  track_progress @file_list[:libs] do |lib|
    Brakeman.debug "Processing #{lib.path}"
    process_lib lib
  end
end

#process_model(path, ast) ⇒ Object 



330
331
332
 
# File 'lib/brakeman/scanner.rb', line 330

def process_model path, ast
  @processor.process_model(ast, path)
end

#process_models ⇒ Object

Process all the .rb files in models/

Adds the processed models to tracker.models



323
324
325
326
327
328
 
# File 'lib/brakeman/scanner.rb', line 323

def process_models
  track_progress @file_list[:models] do |model|
    Brakeman.debug "Processing #{model[:path]}"
    process_model model[:path], model[:ast]
  end
end

#process_routes ⇒ Object

Process config/routes.rb

Adds parsed information to tracker.routes



249
250
251
252
253
254
255
256
257
258
259
260
261
 
# File 'lib/brakeman/scanner.rb', line 249

def process_routes
  if @app_tree.exists?("config/routes.rb")
    file = @app_tree.file_path("config/routes.rb")
    if routes_sexp = parse_ruby_file(file)
      @processor.process_routes routes_sexp
    else
      Brakeman.notify "[Notice] Error while processing routes - assuming all public controller methods are actions."
      options[:assume_all_routes] = true
    end
  else
    Brakeman.notify "[Notice] No route information found"
  end
end

#process_template(template) ⇒ Object 



307
308
309
 
# File 'lib/brakeman/scanner.rb', line 307

def process_template template
  @processor.process_template(template.name, template.ast, template.type, nil, template.path)
end

#process_template_data_flows ⇒ Object 



311
312
313
314
315
316
317
318
 
# File 'lib/brakeman/scanner.rb', line 311

def process_template_data_flows
  templates = tracker.templates.sort_by { |name, _| name.to_s }

  track_progress templates, "templates" do |name, template|
    Brakeman.debug "Processing #{name}"
    @processor.process_template_alias template
  end
end

#process_templates ⇒ Object

Process all views and partials in views/

Adds processed views to tracker.views



298
299
300
301
302
303
304
305
 
# File 'lib/brakeman/scanner.rb', line 298

def process_templates
  templates = @file_list[:templates].sort_by { |t| t[:path] }

  track_progress templates, "templates" do |template|
    Brakeman.debug "Processing #{template[:path]}"
    process_template template
  end
end

#report_progress(current, total, type = "files") ⇒ Object 



344
345
346
347
 
# File 'lib/brakeman/scanner.rb', line 344

def report_progress(current, total, type = "files")
  return unless @options[:report_progress]
  $stderr.print " #{current}/#{total} #{type} processed\r"
end

#track_progress(list, type = "files") ⇒ Object 



334
335
336
337
338
339
340
341
342
 
# File 'lib/brakeman/scanner.rb', line 334

def track_progress list, type = "files"
  total = list.length
  current = 0
  list.each do |item|
    report_progress current, total, type
    current += 1
    yield item
  end
end

#tracker ⇒ Object

Returns the Tracker generated from the scan



37
38
39
 
# File 'lib/brakeman/scanner.rb', line 37

def tracker
  @processor.tracked_events
end