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# TODO: which binding is used should be an option somewhere
from cryptography.bindings.openssl import api
class BlockCipher(object):
def __init__(self, cipher, mode):
super(BlockCipher, self).__init__()
self.cipher = cipher
self.mode = mode
self._ctx = api.create_block_cipher_context(cipher, mode)
def encrypt(self, plaintext):
return api.update_encrypt_context(self._ctx, plaintext)
def finalize(self):
# TODO: this might be a decrypt context
result = api.finalize_encrypt_context(self._ctx)
self._ctx = None
return result
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