Cipher：字符串加解密 

 1 from Crypto.Cipher import AES
 2 from binascii import b2a_hex, a2b_hex
 3 
 4 """
 5 pip install pycryptodome
 6 """
 7 
 8 
 9 class Cipher(object):
10     MODE = AES.MODE_CBC
11     DEFAULT_KEY = b"024ea589b1f070da"
12 
13     def __init__(self, key: bytes = b"024ea589b1f070da"):
14         """key: 16位, 24位, 32位"""
15         self.DEFAULT_KEY = key
16 
17     @classmethod
18     def encrypt(cls, text: str):
19         """这里密钥key 长度必须为16（AES-128）、24（AES-192）、或32（AES-256）Bytes 长度.目前AES-128足够用"""
20         cipher = AES.new(cls.DEFAULT_KEY, cls.MODE, cls.DEFAULT_KEY)
21         length = 16
22         count = len(text)
23         add = length - (count % length)
24         text += '\0' * add
25         return b2a_hex(cipher.encrypt(text.encode())).decode()
26 
27     @classmethod
28     def decrypt(cls, text: str):
29         cipher = AES.new(cls.DEFAULT_KEY, cls.MODE, cls.DEFAULT_KEY)
30         plain_text = cipher.decrypt(a2b_hex(text))
31         return plain_text.rstrip(b'\0').decode()
32 
33 
34 if __name__ == '__main__':
35     cipher = Cipher()
36     text = cipher.encrypt('hello')
37     print(text)
38     print(cipher.decrypt('f9cca2bb60e577874271c538c6c06161'))

 

posted @ 2021-01-06 17:15  士为知己  阅读(580)  评论(0)    收藏  举报