def test_key_by_id(self):
with self.settings(
RESTCLIENTS_KWS_DAO_CLASS='restclients.dao_implementation.kws.File'):
kws = KWS()
key = kws.get_key('ee99defd-baee-43b0-9e1e-f8238dd106bb')
self.assertEquals(key.algorithm, 'AES128CBC', 'Correct algorithm')
self.assertEquals(key.cipher_mode, 'CBC', 'Correct cipher mode')
self.assertEquals(key.expiration.isoformat(), '2013-04-11T13:44:33', 'Correct expiration')
self.assertEquals(key.key_id, 'ee99defd-baee-43b0-9e1e-f8238dd106bb', 'Correct key ID')
self.assertEquals(key.key, 'Uv2JsxggfxF9OQNzIxAzDQ==', 'Correct key')
self.assertEquals(key.size, 128, 'Correct key size')
self.assertEquals(key.url, 'https://it-wseval1.s.uw.edu/key/v1/encryption/ee99defd-baee-43b0-9e1e-f8238dd106bb.json', 'Correct key URL')
def __init__(self, settings, message):
"""
UW Course Event object
Takes a dict representing a UW Course Event Message
Raises EventException
"""
self._kws = KWS()
self._settings = settings
self._re_guid = re.compile(
r'^[\da-f]{8}(-[\da-f]{4}){3}-[\da-f]{12}$', re.I)
self._re_json_cruft = re.compile(r'[^{]*({.*})[^}]*')
try:
self._header = message['Header']
self._body = message['Body']
except KeyError:
self._header = {}
self._body = message
if ('MessageType' in self._header and
self._header['MessageType'] != self._eventMessageType):
raise EventException(
'Unknown Message Type: %s' % (self._header['MessageType']))
self._log = getLogger(__name__)
def test_key_by_id(self):
kws = KWS()
key = kws.get_key('ee99defd-baee-43b0-9e1e-f8238dd106bb')
self.assertEquals(key.algorithm, 'AES128CBC', 'Correct algorithm')
self.assertEquals(key.cipher_mode, 'CBC', 'Correct cipher mode')
self.assertEquals(
key.expiration.isoformat(),
'2013-04-11T13:44:33', 'Correct expiration')
self.assertEquals(
key.key_id,
'ee99defd-baee-43b0-9e1e-f8238dd106bb', 'Correct key ID')
self.assertEquals(key.key, 'Uv2JsxggfxF9OQNzIxAzDQ==', 'Correct key')
self.assertEquals(key.size, 128, 'Correct key size')
self.assertEquals(
key.url,
'https://it-wseval1.s.uw.edu/key/v1/encryption/ee99defd-baee-43b0-9e1e-f8238dd106bb.json',
'Correct key URL')
class EventBase(object):
"""
UW Course Event Handler
"""
_header = None
_body = None
def __init__(self, settings, message):
"""
UW Course Event object
Takes a dict representing a UW Course Event Message
Raises EventException
"""
self._kws = KWS()
self._settings = settings
self._re_guid = re.compile(
r'^[\da-f]{8}(-[\da-f]{4}){3}-[\da-f]{12}$', re.I)
self._re_json_cruft = re.compile(r'[^{]*({.*})[^}]*')
try:
self._header = message['Header']
self._body = message['Body']
except KeyError:
self._header = {}
self._body = message
if ('MessageType' in self._header and
self._header['MessageType'] != self._eventMessageType):
raise EventException(
'Unknown Message Type: %s' % (self._header['MessageType']))
self._log = getLogger(__name__)
def validate(self):
try:
t = self._header['Version']
if t != self._eventMessageVersion:
raise EventException('Unknown Version: ' + t)
to_sign = self._header['MessageType'] + '\n' \
+ self._header['MessageId'] + '\n' \
+ self._header['TimeStamp'] + '\n' \
+ self._body + '\n'
sig_conf = {
'cert': {
'type': 'url',
'reference': self._header['SigningCertURL']
}
}
Signature(sig_conf).validate(to_sign.encode('ascii'),
b64decode(self._header['Signature']))
except KeyError as err:
if len(self._header):
raise EventException('Invalid Signature Header: %s' % (err))
except CryptoException as err:
raise EventException('Crypto: %s' % (err))
except Exception as err:
raise EventException('Invalid signature: %s' % (err))
def extract(self):
try:
if 'Encoding' not in self._header:
if isinstance(self._body, basestring):
return(json.loads(
self._re_json_cruft.sub(r'\g<1>', self._body)))
elif isinstance(self._body, dict):
return self._body
else:
raise EventException('No body encoding')
t = self._header['Encoding']
if str(t).lower() != 'base64':
raise EventException('Unkown encoding: ' + t)
t = self._header.get('Algorithm', 'aes128cbc')
if str(t).lower() != 'aes128cbc':
raise EventException('Unsupported algorithm: ' + t)
key = None
if 'KeyURL' in self._header:
key = self._kws._key_from_json(
self._kws._get_resource(self._header['KeyURL']))
elif 'KeyId' in self._header:
key = self._kws.get_key(self._header['KeyId'])
else:
try:
key = self._kws.get_current_key(
self._header['MessageType'])
if not re.match(r'^\s*{.+}\s*$', self._body):
raise CryptoException()
except (ValueError, CryptoException) as err:
RestClientsCache().delete_cached_kws_current_key(
self._header['MessageType'])
key = self._kws.get_current_key(
self._header['MessageType'])
cipher = aes128cbc(b64decode(key.key),
b64decode(self._header['IV']))
body = cipher.decrypt(b64decode(self._body))
return(json.loads(self._re_json_cruft.sub(r'\g<1>', body)))
except KeyError as err:
self._log.error(
"Key Error: %s\nHEADER: %s" % (err, self._header))
raise
except (ValueError, CryptoException) as err:
raise EventException('Cannot decrypt: %s' % (err))
except DataFailureException as err:
msg = "Request failure for %s: %s (%s)" % (
err.url, err.msg, err.status)
self._log.error(msg)
raise EventException(msg)
except Exception as err:
raise EventException('Cannot read: %s' % (err))
def process(self):
if self._settings.get('VALIDATE_MSG_SIGNATURE', True):
self.validate()
self.process_events(self.extract())
def process_events(self, events):
raise EventException('No event processor defined')
def load_enrollments(self, enrollments):
enrollment_count = len(enrollments)
if enrollment_count:
for enrollment in enrollments:
try:
Enrollment.objects.add_enrollment(enrollment)
except Exception as err:
raise EventException('Load enrollment failed: %s' % (err))
try:
self.record_success(enrollment_count)
except:
pass
def record_success_to_log(self, log_model, event_count):
minute = int(floor(time() / 60))
try:
e = log_model.objects.get(minute=minute)
e.event_count += event_count
except log_model.DoesNotExist:
e = log_model(minute=minute, event_count=event_count)
e.save()
if e.event_count <= 5:
limit = self._settings.get(
'EVENT_COUNT_PRUNE_AFTER_DAY', 7) * 24 * 60
prune = minute - limit
log_model.objects.filter(minute__lt=prune).delete()
