def decipherSendMode (data, key):
assert not len(data) % len(key)
iv = 8*'00'
res = []
while len(data):
iv = _hexlify(_simpleDES(crc.mergeList(key), xorit(iv, data[0:8])))
res.append(iv)
data = data[8:]
return _unhexlify (''.join(res))
def xorit (iv, data):
return crc.mergeList (map (lambda (x,y) : x^y, zip (crc._listFromStr (iv), data)))
