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(astfiles) ⇒ Object 



145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
 
# File 'lib/brakeman/scanner.rb', line 145

def detect_file_types(astfiles)
  detector = Brakeman::FileTypeDetector.new

  astfiles.each do |file|
    Brakeman.logger.spin

    if file.is_a? Brakeman::TemplateParser::TemplateFile
      file_cache.add_file file, :template
    else
      type = detector.detect_type(file)

      unless type == :skip
        if file_cache.valid_type? type
          file_cache.add_file(file, type)
        else
          raise "Unexpected file type: #{type.inspect}"
        end
      end
    end
  end
end

#file_cache ⇒ Object 



41
42
43
 
# File 'lib/brakeman/scanner.rb', line 41

def file_cache
  tracker.file_cache
end

#guess_rails_version ⇒ Object

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



253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
 
# File 'lib/brakeman/scanner.rb', line 253

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

#index_call_sites ⇒ Object 



417
418
419
 
# File 'lib/brakeman/scanner.rb', line 417

def index_call_sites
  tracker.index_call_sites
end

#parse_files(ruby_paths:, template_paths:) ⇒ Object 



127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/brakeman/scanner.rb', line 127

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

  fp.parse_files ruby_paths

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

  fp.read_files(template_paths) do |path, contents|
    Brakeman.logger.spin
    template_parser.parse_template(path, contents)
  end

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

  fp.file_list
end

#parse_ruby_file(file) ⇒ Object 



421
422
423
424
425
426
427
 
# File 'lib/brakeman/scanner.rb', line 421

def parse_ruby_file file
  fp = Brakeman::FileParser.new(tracker.app_tree, tracker.options[:parser_timeout], false, tracker.options[:use_prism])
  fp.parse_ruby(file.read, file)
rescue Exception => e
  tracker.error(e)
  nil
end

#process(ruby_paths: nil, template_paths: nil) ⇒ Object

Process everything in the Rails application



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
81
82
83
84
85
86
87
88
89
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
116
117
118
119
120
121
122
123
124
125
 
# File 'lib/brakeman/scanner.rb', line 54

def process(ruby_paths: nil, template_paths: nil)
  process_step 'Processing gems' do
    process_gems
  end

  process_step 'Processing configuration' do
    guess_rails_version
    process_config
  end

  # -
  # If ruby_paths or template_paths are set,
  # only parse those files. The rest will be fetched
  # from the file cache.
  #
  # Otherwise, parse everything normally.
  #
  astfiles = nil
  process_step 'Finding files' do
    ruby_paths ||= tracker.app_tree.ruby_file_paths
    template_paths ||= tracker.app_tree.template_paths
  end

  process_step 'Parsing files' do
    astfiles = parse_files(ruby_paths: ruby_paths, template_paths: template_paths)
  end

  process_step 'Detecting file types' do
    detect_file_types(astfiles)
  end

  tracker.save_file_cache! if support_rescanning?
  # -

  process_step 'Processing initializers' do
    process_initializers
  end

  process_step 'Processing libraries' do
    process_libs
  end

  process_step 'Processing routes' do
    process_routes
  end

  process_step 'Processing templates' do
    process_templates
  end

  process_step 'Processing data flow' do
    process_template_data_flows
  end

  process_step 'Processing models' do
    process_models
  end

  process_step 'Processing controllers' do
    process_controllers
  end

  process_step 'Processing data flow' do
    process_controller_data_flows
  end

  process_step 'Indexing method calls' do
    index_call_sites
  end

  tracker
end

#process_config ⇒ Object

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

Stores parsed information in tracker.config



170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
 
# File 'lib/brakeman/scanner.rb', line 170

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.debug 'Escaping HTML by default'
  end

  if @app_tree.exists? ".ruby-version"
    if version = @app_tree.file_path(".ruby-version").read[/(\d\.\d.\d+)/]
      tracker.config.set_ruby_version version, @app_tree.file_path(".ruby-version"), 1
    end
  end

  tracker.config.load_rails_defaults
end

#process_controller(astfile) ⇒ Object 



350
351
352
353
354
355
356
 
# File 'lib/brakeman/scanner.rb', line 350

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 



335
336
337
338
339
340
341
342
343
344
345
346
347
348
 
# File 'lib/brakeman/scanner.rb', line 335

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

  track_progress controllers, "controllers" do |name, controller|
    process_step_file name do
      controller.src.each do |file, src|
        @processor.process_controller_alias name, src, nil, file
      end
    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



325
326
327
328
329
330
331
332
333
 
# File 'lib/brakeman/scanner.rb', line 325

def process_controllers
  controllers = file_cache.controllers.sort_by { |path, _| path }

  track_progress controllers do |path, controller|
    process_step_file path do
      process_controller controller
    end
  end
end

#process_gems ⇒ Object

Process Gemfile



213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
 
# File 'lib/brakeman/scanner.rb', line 213

def process_gems
  gem_files = {}
  gem_file_names = ['Gemfile', 'gems.rb']
  lock_file_names = ['Gemfile.lock', 'gems.locked']

  if tracker.options[:gemfile]
    name = tracker.options[:gemfile]
    gem_file_names.unshift name
    lock_file_names.unshift "#{name}.lock"
  end

  gem_file_names.each do |name|
    if @app_tree.exists? name
      file = @app_tree.file_path(name)
      gem_files[:gemfile] = { :src => parse_ruby_file(file), :file => file }
      break
    end
  end

  lock_file_names.each do |name|
    if @app_tree.exists? name
      file = @app_tree.file_path(name)
      gem_files[:gemlock] = { :src => file.read, :file => file }
      break
    end
  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.alert 'Error while processing Gemfile'
  tracker.error e.exception(e.message + "\nWhile processing Gemfile"), e.backtrace
end

#process_initializer(init) ⇒ Object

Process an initializer



283
284
285
 
# File 'lib/brakeman/scanner.rb', line 283

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



274
275
276
277
278
279
280
 
# File 'lib/brakeman/scanner.rb', line 274

def process_initializers
  track_progress file_cache.initializers do |path, init|
    process_step_file path do
      process_initializer init
    end
  end
end

#process_lib(lib) ⇒ Object

Process a library



301
302
303
 
# File 'lib/brakeman/scanner.rb', line 301

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

#process_libs ⇒ Object

Adds parsed information to tracker.libs. This is a catch-all for any Ruby files that weren’t determined to be a specific type of file (like a controller).



290
291
292
293
294
295
296
297
298
 
# File 'lib/brakeman/scanner.rb', line 290

def process_libs
  libs = file_cache.libs.sort_by { |path, _| path }

  track_progress libs do |path, lib|
    process_step_file path do
      process_lib lib
    end
  end
end

#process_model(astfile) ⇒ Object 



398
399
400
 
# File 'lib/brakeman/scanner.rb', line 398

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

#process_models ⇒ Object

Process all the .rb files in models/

Adds the processed models to tracker.models



388
389
390
391
392
393
394
395
396
 
# File 'lib/brakeman/scanner.rb', line 388

def process_models
  models = file_cache.models.sort_by { |path, _| path }

  track_progress models do |path, model|
    process_step_file path do
      process_model model
    end
  end
end

#process_routes ⇒ Object

Process config/routes.rb

Adds parsed information to tracker.routes



308
309
310
311
312
313
314
315
316
317
318
319
320
 
# File 'lib/brakeman/scanner.rb', line 308

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.alert 'Error while processing routes - assuming all public controller methods are actions.'
      options[:assume_all_routes] = true
    end
  else
    Brakeman.alert 'No route information found'
  end
end

#process_step(description) ⇒ Object 



45
46
47
 
# File 'lib/brakeman/scanner.rb', line 45

def process_step(description, &)
  Brakeman.process_step(description, &)
end

#process_step_file(description) ⇒ Object 



49
50
51
 
# File 'lib/brakeman/scanner.rb', line 49

def process_step_file(description, &)
  Brakeman.logger.single_context(description, &)
end

#process_template(template) ⇒ Object 



371
372
373
 
# File 'lib/brakeman/scanner.rb', line 371

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

#process_template_data_flows ⇒ Object 



375
376
377
378
379
380
381
382
383
 
# File 'lib/brakeman/scanner.rb', line 375

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

  track_progress templates, "templates" do |name, template|
    process_step_file name do
      @processor.process_template_alias template
    end
  end
end

#process_templates ⇒ Object

Process all views and partials in views/

Adds processed views to tracker.views



361
362
363
364
365
366
367
368
369
 
# File 'lib/brakeman/scanner.rb', line 361

def process_templates
  templates = file_cache.templates.sort_by { |path, _| path }

  track_progress templates, "templates" do |path, template|
    process_step_file path do
      process_template template
    end
  end
end

#report_progress(current, total) ⇒ Object 



412
413
414
415
 
# File 'lib/brakeman/scanner.rb', line 412

def report_progress(current, total)
  return unless @options[:report_progress]
  Brakeman.logger.update_progress(current, total)
end

#support_rescanning? ⇒ Boolean

Returns:

  • (Boolean) 


429
430
431
 
# File 'lib/brakeman/scanner.rb', line 429

def support_rescanning?
  tracker.options[:support_rescanning]
end

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



402
403
404
405
406
407
408
409
410
 
# File 'lib/brakeman/scanner.rb', line 402

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