def decode_header(self, raw_header):
# assume raw_header is bytearray of values
salt_end = GCM.get_salt_length()
gcm_end = salt_end + GCM.get_iv_length()
password_salt = bytes(raw_header[:salt_end])
iv = bytes(raw_header[salt_end:gcm_end])
self._gcm = GCM(iv=iv, password_salt=password_salt)
self._gcm.make_key(self._password)
del self._password
def get_header_length(self):
return GCM.get_iv_length() + GCM.get_salt_length()
