Patch taken from the Debian package for python-axolotl-0.1.39. See <https://bugs.gnu.org/29415>. Description: Removes IV paramenter from AES constructor, since it is not necessary for ctr mode. Author: Josue Ortega <josue@debian.org> Last-Update: 2017-04-13 --- a/axolotl/sessioncipher.py +++ b/axolotl/sessioncipher.py @@ -228,13 +228,7 @@ # counterint = struct.unpack(">L", counterbytes)[0] # counterint = int.from_bytes(counterbytes, byteorder='big') ctr = Counter.new(128, initial_value=counter) - - # cipher = AES.new(key, AES.MODE_CTR, counter=ctr) - ivBytes = bytearray(16) - ByteUtil.intToByteArray(ivBytes, 0, counter) - - cipher = AES.new(key, AES.MODE_CTR, IV=bytes(ivBytes), counter=ctr) - + cipher = AES.new(key, AES.MODE_CTR, counter=ctr) return cipher