def value_decode(self, val):
log.debug("Got value to decode: %s" % val)
encoded_data = val
val = base64.b64decode(val.strip('"'))
hashlength = get_hash_length(self.hashalg) / 4
sig, data = val[:hashlength], val[hashlength:]
if verify_data(data, sig, self.sig_key, self.hashalg):
return self.serializer.loads(data), encoded_data
def value_decode(self, val):
encoded_data = val
val = base64.b64decode(val.strip('"'))
hashlength = get_hash_length(self.hashalg) / 4
sig, ciphertext = val[:hashlength], val[hashlength:]
data = decrypt_authenticated(ciphertext, sig, self.enc_key,
self.sig_key, self.hashalg)
return self.serializer.loads(data), encoded_data
def test_get_hash_length():
for algname, length in [('md5', 128), ('sha1', 160), ('sha256', 256),
('sha512', 512)]:
alg = getattr(hashlib, algname)
assert get_hash_length(alg) == length
