def aes_ctr_crypt(key, data_orig, ctr_val): data = [x for x in data_orig] AESr = AES.new(_OT.bytes_to_cbytes(key), AES.MODE_CTR, counter=OtrCrypt.aes_counter(ctr_val)) # need to fill to a multiple of 16; since it is in # counter mode, we can just ignore the end of the encrypted output fill_len = (16 - (len(data) % 16)) % 16 data.extend([0]*fill_len) # do the encryption enc_str = AESr.encrypt(_OT.bytes_to_cbytes(data)) return _OT.string_to_bytes(enc_str[:-fill_len])
def process_outgoing(self, msg):
logging.debug("Outgoing")
if self.auth.message_state_is("MSGSTATE_ENCRYPTED"):
self.auth.dh_keys.prepare_session_to_send()
vars = self.auth.dh_keys.encrypt_data_message(_OT.string_to_bytes(msg.getBody()))
logging.debug( vars )
#r = raw_input()
enc_msg = self.message_factory().create_data(*vars)
self.client.send(enc_msg.jabber_msg)
else:
self.client.send(msg)
return msg
def payload_to_bytes(self, payload): return _OT.string_to_bytes(base64.b64decode(payload))
def get_sha1_bytes(data): return _OT.string_to_bytes(SHA.new(_OT.bytes_to_string(data)).digest())
def get_sha1_hmac(key, data): return _OT.string_to_bytes(HMAC.new(_OT.bytes_to_string(key), _OT.bytes_to_string(data), SHA).digest())
