def GetCipher(self):
if self.name == "AES128CBC":
return rdf_crypto.AES128CBCCipher(self.key, self.metadata_iv)
def Encrypt(self, data, iv=None):
"""Symmetrically encrypt the data using the optional iv."""
if iv is None:
iv = rdf_crypto.EncryptionKey.GenerateKey(length=128)
cipher = rdf_crypto.AES128CBCCipher(self.cipher.key, iv)
return iv, cipher.Encrypt(data)
def Decrypt(self, data, iv):
"""Symmetrically decrypt the data."""
key = rdf_crypto.EncryptionKey(self.cipher.key)
iv = rdf_crypto.EncryptionKey(iv)
return rdf_crypto.AES128CBCCipher(key, iv).Decrypt(data)