func NewTimedRC4Rand() TimedRC4Rand {
ciph, err := rc4.NewCipher(bytes.Int64ToBytes(time.Nanoseconds()))
if err != nil {
panic("rc4 gen error")
}
return TimedRC4Rand{ciph}
}
func (id Id) Mask() Id {
sha := sha1.New()
b := bytes.Int64ToBytes(int64(uint64(id)))
sha.Write(b)
sum := sha.Sum()
i, err := bytes.BytesToInt64(sum[0 : 64/8])
if err != nil {
panic("id, mask")
}
return Id(uint64(i))
}
