pyt/pyt/github_search.py at development · python-security/pyt · GitHub

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import re

import requests

import time

from abc import ABCMeta, abstractmethod

from datetime import date, datetime, timedelta

from . import repo_runner

from .reaching_definitions_taint import ReachingDefinitionsTaintAnalysis

from .repo_runner import add_repo_to_csv, NoEntryPathError

from .save import save_repo_scan

from .vulnerabilities import SinkArgsError

DEFAULT_TIMEOUT_IN_SECONDS = 60

GITHUB_API_URL = 'https://api.github.com'

GITHUB_OAUTH_TOKEN = None

NUMBER_OF_REQUESTS_ALLOWED_PER_MINUTE = 30 # Rate limit is 10 and 30 with auth

SEARCH_CODE_URL = GITHUB_API_URL + '/search/code'

SEARCH_REPO_URL = GITHUB_API_URL + '/search/repositories'

def set_github_api_token():

global GITHUB_OAUTH_TOKEN

try:

GITHUB_OAUTH_TOKEN = open('github_access_token.pyt',

'r').read().strip()

except FileNotFoundError:

print('Insert your GitHub access token'

' in the github_access_token.pyt file in the pyt package'

' if you want to use GitHub search.')

exit(0)

class Languages:

_prefix = 'language:'

python = _prefix + 'python'

javascript = _prefix + 'javascript'

# add others here

class Query:

def __init__(self, base_url, search_string,

language=None, repo=None, time_interval=None, per_page=100):

repo = self._repo_parameter(repo)

time_interval = self._time_interval_parameter(time_interval)

search_string = self._search_parameter(search_string)

per_page = self._per_page_parameter(per_page)

parameters = self._construct_parameters([search_string,

language,

repo,

time_interval,

per_page])

self.query_string = self._construct_query(base_url, parameters)

def _construct_query(self, base_url, parameters):

query = base_url

query += '+'.join(parameters)

return query

def _construct_parameters(self, parameters):

r = list()

for p in parameters:

if p:

r.append(p)

return r

def _search_parameter(self, search_string):

return '?q="' + search_string + '"'

def _repo_parameter(self, repo):

if repo:

return 'repo:' + repo.name

else:

return None

def _time_interval_parameter(self, created):

if created:

p = re.compile('\d\d\d\d-\d\d-\d\d \.\. \d\d\d\d-\d\d-\d\d')

m = p.match(created)

if m.group():

return 'created:"' + m.group() + '"'

else:

print('The time interval parameter should be '

'of the form: "YYYY-MM-DD .. YYYY-MM-DD"')

exit(1)

return None

def _per_page_parameter(self, per_page):

if per_page > 100:

print('The GitHub api does not allow pages with over 100 results.')

exit(1)

return '&per_page={}'.format(per_page)

class IncompleteResultsError(Exception):

pass

class RequestCounter:

def __init__(self, timeout=DEFAULT_TIMEOUT_IN_SECONDS):

self.timeout_in_seconds = timeout # timeout in seconds

self.counter = list()

def append(self, request_time):

if len(self.counter) < NUMBER_OF_REQUESTS_ALLOWED_PER_MINUTE:

self.counter.append(request_time)

else:

delta = request_time - self.counter[0]

if delta.seconds < self.timeout_in_seconds:

print('Maximum requests "{}" reached'

' timing out for {} seconds.'

.format(len(self.counter),

self.timeout_in_seconds - delta.seconds))

self.timeout(self.timeout_in_seconds - delta.seconds)

self.counter.pop(0) # pop index 0

self.counter.append(datetime.now())

else:

self.counter.pop(0) # pop index 0

self.counter.append(request_time)

def timeout(self, time_in_seconds=DEFAULT_TIMEOUT_IN_SECONDS):

time.sleep(time_in_seconds)

class Search(metaclass=ABCMeta):

request_counter = RequestCounter()

def __init__(self, query):

self.total_count = None

self.incomplete_results = None

self.results = list()

self._request(query.query_string)

def _request(self, query_string):

Search.request_counter.append(datetime.now())

print('Making request: {}'.format(query_string))

headers = {'Authorization': 'token ' + GITHUB_OAUTH_TOKEN}

r = requests.get(query_string, headers=headers)

json = r.json()

if r.status_code != 200:

print('Bad request:')

print(r.status_code)

print(json)

Search.request_counter.timeout()

self._request(query_string)

return

self.total_count = json['total_count']

print('Number of results: {}.'.format(self.total_count))

self.incomplete_results = json['incomplete_results']

if self.incomplete_results:

raise IncompleteResultsError()

self.parse_results(json['items'])

@abstractmethod

def parse_results(self, json_results):

pass

class SearchRepo(Search):

def parse_results(self, json_results):

for item in json_results:

self.results.append(Repo(item))

class SearchCode(Search):

def parse_results(self, json_results):

for item in json_results:

self.results.append(File(item))

class File:

def __init__(self, json):

self.name = json['name']

self.repo = Repo(json['repository'])

class Repo:

def __init__(self, json):

self.url = json['html_url']

self.name = json['full_name']

def get_dates(start_date, end_date=date.today(), interval=7):

delta = end_date - start_date

for i in range(delta.days // interval):

yield (start_date + timedelta(days=(i * interval) - interval),

start_date + timedelta(days=i * interval))

else:

# Take care of the remainder of days

yield (start_date + timedelta(days=i * interval),

start_date + timedelta(days=i * interval +

interval +

delta.days % interval))

def scan_github(search_string, start_date, analysis_type, analyse_repo_func, csv_path):

analyse_repo = analyse_repo_func

for d in get_dates(start_date, interval=7):

q = Query(SEARCH_REPO_URL, search_string,

language=Languages.python,

time_interval=str(d[0]) + ' .. ' + str(d[1]),

per_page=100)

s = SearchRepo(q)

for repo in s.results:

q = Query(SEARCH_CODE_URL, 'app = Flask(__name__)',

Languages.python, repo)

s = SearchCode(q)

if s.results:

r = repo_runner.Repo(repo.url)

try:

r.clone()

except NoEntryPathError as err:

save_repo_scan(repo, r.path, vulnerability_log=None, error=err)

continue

except:

save_repo_scan(repo, r.path, vulnerability_log=None, error='Other Error Unknown while cloning :-(')

continue

try:

vulnerability_log = analyse_repo(r, analysis_type)

if vulnerability_log.vulnerabilities:

save_repo_scan(repo, r.path, vulnerability_log)

add_repo_to_csv(csv_path, r)

else:

save_repo_scan(repo, r.path, vulnerability_log=None)

r.clean_up()

except SinkArgsError as err:

save_repo_scan(repo, r.path, vulnerability_log=None, error=err)

except SyntaxError as err:

save_repo_scan(repo, r.path, vulnerability_log=None, error=err)

except IOError as err:

save_repo_scan(repo, r.path, vulnerability_log=None, error=err)

except AttributeError as err:

save_repo_scan(repo, r.path, vulnerability_log=None, error=err)

except:

save_repo_scan(repo, r.path, vulnerability_log=None, error='Other Error Unknown :-(')

if __name__ == '__main__':

for x in get_dates(date(2010, 1, 1), interval=93):

print(x)

exit()

scan_github('flask', ReachingDefinitionsTaintAnalysis)

exit()

q = Query(SEARCH_REPO_URL, 'flask')

s = SearchRepo(q)

for repo in s.results[:3]:

q = Query(SEARCH_CODE_URL, 'app = Flask(__name__)', Languages.python, repo)

s = SearchCode(q)

r = repo_runner.Repo(repo.url)

r.clone()

print(r.path)

r.clean_up()

print(repo.name)

print(len(s.results))

print([f.name for f in s.results])

exit()

r = RequestCounter('test', timeout=2)

for x in range(15):

r.append(datetime.now())

exit()

dates = get_dates(date(2010, 1, 1))

for date in dates:

q = Query(SEARCH_REPO_URL, 'flask',

time_interval=str(date) + ' .. ' + str(date))

print(q.query_string)

exit()

s = SearchRepo(q)

print(s.total_count)

print(s.incomplete_results)

print([r.URL for r in s.results])

q = Query(SEARCH_CODE_URL, 'import flask', Languages.python, s.results[0])

s = SearchCode(q)

#print(s.total_count)

#print(s.incomplete_results)

#print([f.name for f in s.results])

pyt/pyt/github_search.py at development · python-security/pyt · GitHub

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