base64 两次反转加密后, 逆向解码不一致

直接贴测试代码

import base64


p = b'123456'
print('password: %s' % p)
salt = b'84'
print('salt: %s' % salt)
print('reverser:')
p = p[::-1]
print(p)
print('encode:')
p = base64.b64encode(p, salt)
print(p)
print('reverser:')
p = p.strip(b'=')[::-1]
print(p)
print('encode:')
p = base64.b64encode(p, salt)
print(p)
print('reverser:')
p = p.strip(b'=')[::-1]
print(p)

print('\ndecode password')
print('reverser:')
rp = p[::-1] + b'=='
print(rp)
print('decode:')
rp = base64.b64decode(rp, salt)
print(rp)
print('reverser:')
rp = rp[::-1] + b'=='
print(rp)
print('decode:')
rp = base64.b64decode(rp, salt)
print(rp)
print('reverser:')
rp = rp[::-1]
print(rp)

输出结果:

encode:
NjU0MzIx
reverser:
xIzM0UjN
encode:
eEl6TTBVak4=
reverser:
4kaVBTT6lEe

decode password
reverser:
eEl6TTBVak4==
decode:
xIzM0UjO
reverser:
OjU0MzIx==
decode:
:54321
reverser:
12345:

在第一次反转解码的时候就出错了, 本来是想在 sqlite 里保存一些可逆的加密字符
想着两次 b64 反转加密应该不容易猜, 结果这个 salt 就出了问题
不指定 salt, 就不会出先这种问题
现在想问一下, 有哪些好用的可逆的加密库, 最好是标准库