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 test_authentication_bad_key(authed):
val, sig = authed
with pytest.raises(CryptoError):
verify_data(val, sig, b'0' + test_sig_key[1:], hashlib.sha256)
def test_authentication_bad_tag(authed):
val, _ = authed
with pytest.raises(CryptoError):
verify_data(val, '0' * 32, test_sig_key, hashlib.sha256)
def test_authentication_wrong_hashalg(authed):
val, sig = authed
with pytest.raises(CryptoError):
verify_data(val, sig, test_sig_key, hashlib.md5)
def test_authentication(authed):
val, sig = authed
assert verify_data(val, sig, test_sig_key, hashlib.sha256)
