diff options
| -rw-r--r-- | cryptography/hazmat/backends/interfaces.py | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/cryptography/hazmat/backends/interfaces.py b/cryptography/hazmat/backends/interfaces.py index e4c1df34..9539d839 100644 --- a/cryptography/hazmat/backends/interfaces.py +++ b/cryptography/hazmat/backends/interfaces.py @@ -142,3 +142,18 @@ class OpenSSLSerializationBackend(object): Load a private key from PEM encoded data, using password if the data is encrypted. """ + + +@six.add_metaclass(abc.ABCMeta) +class CMACBackend(object): + @abc.abstractmethod + def cmac_supported(self): + """ + Returns True if the backend supports CMAC + """ + + @abc.abstractmethod + def create_cmac_ctx(self, key, algorithm): + """ + Create a CMACContext for calculating a message authentication code. + """ |