def MakeWorkingFile(file_data):
"""Fills in arguments to make a basic working file.
Used for ensuring that the basic template is standards-compliant.
"""
file_data = file_data.decode('utf-8')
file_data = FillInParameter('ARRAY_OF_RANDOM_ROLLS',
_ArrayOfRandomRolls(500), file_data)
file_data = FillInParameter('REQUEST_AUDIO_AND_VIDEO',
'{ video: true, audio: true }', file_data)
file_data = FillInParameter('TRANSFORM_OFFER_SDP', _ReturnFirstArgument(),
file_data)
file_data = FillInParameter('TRANSFORM_ANSWER_SDP', _ReturnFirstArgument(),
file_data)
return file_data
def Fuzz(template):
"""Generates a single random HTML page which tries to mess with getUserMedia.
We require a template which has certain placeholders defined in it (such
as FUZZ_USER_MEDIA_INPUT). We then replace these placeholders with random
identifiers and data in certain patterns. For instance, since the getUserMedia
function accepts an object, we try to pass in everything from {video:true,
audio:false} (which is a correct value) to {sdjkjsjh34sd:455, video:'yxuhsd'}
and other strange things.
See the template at corpus/template.html for an example of how a template
looks like.
"""
random.seed()
attributes = RandomJavascriptAttributes(random.randint(0, 10))
if (random.random() < 0.8):
attributes.append('video: %s' % RandomJavascriptValue())
if (random.random() < 0.8):
attributes.append('audio: %s' % RandomJavascriptValue())
input_object = MakeJavascriptObject(attributes)
template = FillInParameter('FUZZ_USER_MEDIA_INPUT', input_object, template)
ok_callback = (RandomJavascriptValue()
if random.random() < 0.5 else 'getUserMediaOkCallback')
template = FillInParameter('FUZZ_OK_CALLBACK', ok_callback, template)
fail_callback = (RandomJavascriptValue() if random.random() < 0.5 else
'getUserMediaFailedCallback')
template = FillInParameter('FUZZ_FAIL_CALLBACK', fail_callback, template)
before_call = 'location.reload();' if random.random() < 0.1 else ''
template = FillInParameter('BEFORE_GET_USER_MEDIA_CALL', before_call,
template)
after_call = 'location.reload();' if random.random() < 0.3 else ''
template = FillInParameter('AFTER_GET_USER_MEDIA_CALL', after_call,
template)
return template
def Fuzz(file_data):
"""Fuzzes the passed in template."""
file_data = file_data.decode('utf-8')
# Generate a bunch of random numbers and encode them into the page. Since the
# values get hard-coded into the page the page's choices will be reproducible.
file_data = FillInParameter('ARRAY_OF_RANDOM_ROLLS',
_ArrayOfRandomRolls(500), file_data)
# Randomly decide how to fuzz SDP data.
file_data = FillInParameter('REQUEST_AUDIO_AND_VIDEO',
_RandomAudioOrVideo(), file_data)
file_data = FillInParameter('TRANSFORM_OFFER_SDP', _RandomSdpTransform(),
file_data)
file_data = FillInParameter('TRANSFORM_ANSWER_SDP', _RandomSdpTransform(),
file_data)
# Random location.reload() calls in the call sequence can be challenging for
# the code to deal with, so insert some here and there.
if random.random() < 0.3:
file_data = _InsertRandomLocationReloadsWithinMarkers(file_data)
return file_data
def _IncludeJsFile(js_include_to_replace, js_path, file_data):
js_file_data = _ReadFile(js_path)
js_file_data = _Indent(js_file_data, 4)
js_file_data = (' <script type="text/javascript">\n' + js_file_data +
'\n </script>\n')
return FillInParameter(js_include_to_replace, js_file_data, file_data)