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#!/usr/bin/env python3
# -*- encoding: utf-8 -*-
'''
@File : data_source.py
@Time : 2020/11/21 11:11:37
@Author : Kyomotoi
@Contact : [email protected]
@Github : https://github.com/Kyomotoi
@License : Copyright © 2018-2020 Kyomotoi, All Rights Reserved.
'''
__author__ = 'kyomotoi'
table = 'fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF'
tr = {}
for i in range(58):
tr[table[i]] = i
s = [11, 10, 3, 8, 4, 6]
xor = 177451812
add = 8728348608
def dec(x) -> int:
r = 0
for i in range(6):
r += tr[x[s[i]]] * 58**i
return (r - add) ^ xor
def enc(x) -> str:
x = (x ^ xor) + add
r = list('BV1 4 1 7 ')
for i in range(6):
r[s[i]] = table[x // 58**i % 58]
return ''.join(r)
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