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import base64
from Crypto . Cipher import AES
from django . conf import settings
class AESCrypto :
"""
AES
除了MODE_SIV模式key长度为：
其余key长度为16, 24 or 32
详细见AES内部文档
CBC模式传入iv参数
本例使用常用的ECB模式
"""
def __init__ ( self , key ) :
if len ( key ) > 32 :
key = key [ : 32 ]
self . key = self . to_16 ( key )
@staticmethod
def to_16 ( key ) :
"""
转为16倍数的bytes数据
:param key:
:return:
"""
key = bytes ( key , encoding = " utf8 " )
while len ( key ) % 16 != 0 :
key + = b ' \0 '
return key # 返回bytes
def aes ( self ) :
return AES . new ( self . key , AES . MODE_ECB ) # 初始化加密器
def encrypt ( self , text ) :
aes = self . aes ( )
return str ( base64 . encodebytes ( aes . encrypt ( self . to_16 ( text ) ) ) ,
encoding = ' utf8 ' ) . replace ( ' \n ' , ' ' ) # 加密
def decrypt ( self , text ) :
aes = self . aes ( )
return str ( aes . decrypt ( base64 . decodebytes ( bytes ( text , encoding = ' utf8 ' ) ) ) . rstrip ( b ' \0 ' ) . decode ( " utf8 " ) ) # 解密
def get_aes_crypto ( key = None ) :
if key is None :
key = settings . SECRET_KEY
a = AESCrypto ( key )
return a
aes_crypto = get_aes_crypto ( )
