def authorization_id_decode(message):
#cmd_id = 0x0007
auth_id = message[34:38]
auth_id = utils.u32_unpack(auth_id)
uuid = message[38:54]
nonce_k = message[54:86]
return auth_id, uuid, nonce_k
def config_decode(message):
#cmd_id = 0x0015
id = message[2:6]
name = message[6:38]
id = utils.u32_unpack(id)
name = utils.string_unpack(name)
return id, name
def decrypt_rx(adata, key):
nonce = adata[:24]
message = adata[30:]
decrypted = decrypt(message, nonce, key)
len_msg = len(decrypted)
message = decrypted[:len_msg - 2]
msg_crc = decrypted[len_msg - 2:len_msg]
msg_crc = utils.u16_unpack(msg_crc)
crc_val = utils.get_crc(message)
auth_id = message[0:4]
auth_id = utils.u32_unpack(auth_id)
message = message[4:]
if (msg_crc != crc_val):
print "crc error: " + str(hex(crc_val))
utils.verify_crc(decrypted)
return auth_id, message, decrypted
def get_auth_id(message):
auth_id = message[24:28]
return utils.u32_unpack(auth_id)