/usr/share/pyshared/social_auth/utils.py is in python-django-social-auth 0.7.23-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import random
import hashlib
import urlparse
import urllib
import logging
from urllib2 import urlopen
from cgi import parse_qsl
from collections import defaultdict
from django.conf import settings
from django.db.models import Model
from django.contrib.contenttypes.models import ContentType
from django.utils.functional import SimpleLazyObject
try:
random = random.SystemRandom()
using_sysrandom = True
except NotImplementedError:
using_sysrandom = False
try:
from django.utils.crypto import get_random_string as random_string
except ImportError: # django < 1.4
# Implementation borrowed from django 1.4
def random_string(length=12,
allowed_chars='abcdefghijklmnopqrstuvwxyz'
'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'):
if not using_sysrandom:
random.seed(hashlib.sha256('%s%s%s' % (random.getstate(),
time.time(),
settings.SECRET_KEY))
.digest())
return ''.join([random.choice(allowed_chars) for i in range(length)])
try:
from django.utils.crypto import constant_time_compare as ct_compare
except ImportError: # django < 1.4
def ct_compare(val1, val2):
if len(val1) != len(val2):
return False
result = 0
for x, y in zip(val1, val2):
result |= ord(x) ^ ord(y)
return result == 0
try:
from django.utils.functional import empty
empty # placate pyflakes
except ImportError: # django < 1.4
empty = None
get_random_string = random_string
constant_time_compare = ct_compare
def sanitize_log_data(secret, data=None, leave_characters=4):
"""
Clean private/secret data from log statements and other data.
Assumes data and secret are strings. Replaces all but the first
`leave_characters` of `secret`, as found in `data`, with '*'.
If no data is given, all but the first `leave_characters` of secret
are simply replaced and returned.
"""
replace_secret = (secret[:leave_characters] +
(len(secret) - leave_characters) * '*')
if data:
return data.replace(secret, replace_secret)
return replace_secret
def sanitize_redirect(host, redirect_to):
"""
Given the hostname and an untrusted URL to redirect to,
this method tests it to make sure it isn't garbage/harmful
and returns it, else returns None, similar as how's it done
on django.contrib.auth.views.
>>> print sanitize_redirect('myapp.com', None)
None
>>> print sanitize_redirect('myapp.com', '')
None
>>> print sanitize_redirect('myapp.com', {})
None
>>> print sanitize_redirect('myapp.com', 'http://notmyapp.com/path/')
None
>>> print sanitize_redirect('myapp.com', 'http://myapp.com/path/')
http://myapp.com/path/
>>> print sanitize_redirect('myapp.com', '/path/')
/path/
"""
# Quick sanity check.
if not redirect_to:
return None
# Heavier security check, don't allow redirection to a different host.
try:
netloc = urlparse.urlparse(redirect_to)[1]
except TypeError: # not valid redirect_to value
return None
if netloc and netloc != host:
return None
return redirect_to
def group_backend_by_type(items, key=lambda x: x):
"""Group items by backend type."""
# Beware of cyclical imports!
from social_auth.backends import \
get_backends, OpenIdAuth, BaseOAuth, BaseOAuth2
result = defaultdict(list)
backends = get_backends()
for item in items:
backend = backends[key(item)]
if issubclass(backend, OpenIdAuth):
result['openid'].append(item)
elif issubclass(backend, BaseOAuth2):
result['oauth2'].append(item)
elif issubclass(backend, BaseOAuth):
result['oauth'].append(item)
return dict(result)
def setting(name, default=None):
"""Return setting value for given name or default value."""
return getattr(settings, name, default)
def backend_setting(backend, name, default=None):
"""
Looks for setting value following these rules:
1. Search for <backend_name> prefixed setting
2. Search for setting given by name
3. Return default
"""
backend_name = get_backend_name(backend)
setting_name = '%s_%s' % (backend_name.upper().replace('-', '_'), name)
if hasattr(settings, setting_name):
return setting(setting_name)
elif hasattr(settings, name):
return setting(name)
else:
return default
logger = None
if not logger:
logger = logging.getLogger('SocialAuth')
logger.setLevel(logging.DEBUG)
def log(level, *args, **kwargs):
"""Small wrapper around logger functions."""
{'debug': logger.debug,
'error': logger.error,
'exception': logger.exception,
'warn': logger.warn}[level](*args, **kwargs)
def model_to_ctype(val):
"""Converts values that are instance of Model to a dictionary
with enough information to retrieve the instance back later."""
if isinstance(val, Model):
val = {
'pk': val.pk,
'ctype': ContentType.objects.get_for_model(val).pk
}
return val
def ctype_to_model(val):
"""Converts back the instance saved by model_to_ctype function."""
if isinstance(val, dict) and 'pk' in val and 'ctype' in val:
ctype = ContentType.objects.get_for_id(val['ctype'])
ModelClass = ctype.model_class()
val = ModelClass.objects.get(pk=val['pk'])
return val
def clean_partial_pipeline(request):
"""Cleans any data for partial pipeline."""
name = setting('SOCIAL_AUTH_PARTIAL_PIPELINE_KEY', 'partial_pipeline')
# Check for key to avoid flagging the session as modified unnecessary
if name in request.session:
request.session.pop(name, None)
def url_add_parameters(url, params):
"""Adds parameters to URL, parameter will be repeated if already present"""
if params:
fragments = list(urlparse.urlparse(url))
fragments[4] = urllib.urlencode(parse_qsl(fragments[4]) +
params.items())
url = urlparse.urlunparse(fragments)
return url
class LazyDict(SimpleLazyObject):
"""Lazy dict initialization."""
def __getitem__(self, name):
if self._wrapped is empty:
self._setup()
return self._wrapped[name]
def __setitem__(self, name, value):
if self._wrapped is empty:
self._setup()
self._wrapped[name] = value
def dsa_urlopen(*args, **kwargs):
"""Like urllib2.urlopen but sets a timeout defined by
SOCIAL_AUTH_URLOPEN_TIMEOUT setting if defined (and not already in
kwargs)."""
timeout = setting('SOCIAL_AUTH_URLOPEN_TIMEOUT')
if timeout and 'timeout' not in kwargs:
kwargs['timeout'] = timeout
return urlopen(*args, **kwargs)
def get_backend_name(backend):
return getattr(getattr(backend, 'AUTH_BACKEND', backend), 'name', None)
def custom_user_frozen_models():
user_model = getattr(settings, 'SOCIAL_AUTH_USER_MODEL', None) or \
getattr(settings, 'AUTH_USER_MODEL', None) or \
'auth.User'
migration_name = getattr(settings, 'INITIAL_CUSTOM_USER_MIGRATION',
'0001_initial.py')
if user_model != 'auth.User':
from south.migration.base import Migrations
from south.exceptions import NoMigrations
from south.creator.freezer import freeze_apps
user_app, user_model = user_model.split('.')
try:
user_migrations = Migrations(user_app)
except NoMigrations:
extra_model = freeze_apps(user_app)
else:
initial_user_migration = user_migrations.migration(migration_name)
extra_model = initial_user_migration.migration_class().models
else:
extra_model = {}
return extra_model
if __name__ == '__main__':
import doctest
doctest.testmod()
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