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| -rw-r--r-- | cryptography/hazmat/primitives/interfaces.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/cryptography/hazmat/primitives/interfaces.py b/cryptography/hazmat/primitives/interfaces.py index e70338ba..ec970e68 100644 --- a/cryptography/hazmat/primitives/interfaces.py +++ b/cryptography/hazmat/primitives/interfaces.py @@ -457,3 +457,23 @@ class KeyDerivationFunction(object): Checks whether the key generated by the key material matches the expected derived key. Raises an exception if they do not match. """ + + +@six.add_metaclass(abc.ABCMeta) +class CMACContext(object): + @abc.abstractmethod + def update(self, data): + """ + Processes the provided bytes. + """ + + def finalize(self): + """ + Returns the results of processing the final block as bytes. + """ + + @abc.abstractmethod + def copy(self): + """ + Return a CMACContext that is a copy of the current context. + """ |