对称加密 Crypto

1, python  对称加密使用，

import ast
from base64 import b64encode
from Crypto.Util.Padding import pad
from base64 import b64decode
from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad

# key只能传入bytes
key = 'ssssssssssfsssssssssssssssfsssss'.encode() 

def pad_key(key):  # 限制只能传入长度为16，32
    while len(key) % 16 != 0:
        key += b' '     #不足的用空格补全
    return key

def get_sign(data):
    cipher = AES.new(key, AES.MODE_CBC)
    ct_bytes = cipher.encrypt(pad(data, AES.block_size))
    iv = b64encode(cipher.iv).decode('utf-8')
    ct = b64encode(ct_bytes).decode('utf-8')
    print(iv)
    print(ct)
    return iv,ct    # 返回偏移和加密数据


def de_sign(iv, sign):
    iv = b64decode(iv)
    ct = b64decode(sign)
    cipher = AES.new(key, AES.MODE_CBC, iv)
    pt = unpad(cipher.decrypt(ct), AES.block_size)
    return ast.literal_eval(str(pt, encoding='utf-8'))


if __name__ == '__main__':
    data = str({'name':'xxx','um':"xxx"}).encode()
    iv,sign = get_sign(data)
    data = de_sign(iv,sign)
    print(data)

　　适用于对数据加传输