#!/usr/bin/env python
# -*- coding:utf-8 -*-
# @author: rui.xu
# @update: jt.huang
# 这里使用pycryptodemo库
# 安装方法 pip install pycryptodemo
from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex
class PrpCrypt( object ):
def __init__( self , key):
self .key = key.encode( 'utf-8' )
self .mode = AES.MODE_CBC
# 加密函数,如果text不足16位就用空格补足为16位,
# 如果大于16当时不是16的倍数,那就补足为16的倍数。
def encrypt( self , text):
text = text.encode( 'utf-8' )
cryptor = AES.new( self .key, self .mode, b '0000000000000000' )
# 这里密钥key 长度必须为16(AES-128),
# 24(AES-192),或者32 (AES-256)Bytes 长度
# 目前AES-128 足够目前使用
length = 16
count = len (text)
if count < length:
add = (length - count)
# \0 backspace
# text = text + ('\0' * add)
text = text + ( '\0' * add).encode( 'utf-8' )
elif count > length:
add = (length - (count % length))
# text = text + ('\0' * add)
text = text + ( '\0' * add).encode( 'utf-8' )
self .ciphertext = cryptor.encrypt(text)
# 因为AES加密时候得到的字符串不一定是ascii字符集的,输出到终端或者保存时候可能存在问题
# 所以这里统一把加密后的字符串转化为16进制字符串
return b2a_hex( self .ciphertext)
# 解密后,去掉补足的空格用strip() 去掉
def decrypt( self , text):
cryptor = AES.new( self .key, self .mode, b '0000000000000000' )
plain_text = cryptor.decrypt(a2b_hex(text))
# return plain_text.rstrip('\0')
return bytes.decode(plain_text).rstrip( '\0' )
if __name__ = = '__main__' :
pc = PrpCrypt( 'keyskeyskeyskeys' ) # 初始化密钥
e = pc.encrypt( "testtesttest" ) # 加密
d = pc.decrypt(e) # 解密
print ( "加密:" , e)
print ( "解密:" , d)
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