Added CMACBackend to MultiBackend
diff --git a/cryptography/hazmat/backends/multibackend.py b/cryptography/hazmat/backends/multibackend.py
index 86cded8..2338568 100644
--- a/cryptography/hazmat/backends/multibackend.py
+++ b/cryptography/hazmat/backends/multibackend.py
@@ -16,12 +16,13 @@
from cryptography import utils
from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
from cryptography.hazmat.backends.interfaces import (
- CipherBackend, DSABackend, HMACBackend, HashBackend, PBKDF2HMACBackend,
- RSABackend
+ CipherBackend, CMACBackend, DSABackend, HMACBackend, HashBackend,
+ PBKDF2HMACBackend, RSABackend
)
@utils.register_interface(CipherBackend)
+@utils.register_interface(CMACBackend)
@utils.register_interface(HashBackend)
@utils.register_interface(HMACBackend)
@utils.register_interface(PBKDF2HMACBackend)
@@ -156,3 +157,11 @@
return b.generate_dsa_private_key(parameters)
raise UnsupportedAlgorithm("DSA is not supported by the backend",
_Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM)
+
+ def cmac_supported(self):
+ for b in self._filtered_backends(CMACBackend):
+ return b.cmac_supported()
+
+ def create_cmac_ctx(self, algorithm):
+ for b in self._filtered_backends(CMACBackend):
+ return b.create_cmac_ctx(algorithm)