AES 加密解密示例（walker）

pip3 install pycryptodome -i https://pypi.doubanio.com/simple/
pip3 install pkcs7 -i https://pypi.doubanio.com/simple/

# encoding=utf-8
# author: walker
# date: 2019-09-19
# summary: AES 加密解密示例（CBC模式，pkcs7占位）

import time
import base64
from urllib import parse
from Crypto.Cipher import AES
from pkcs7 import PKCS7Encoder

def encrypt_aes_pkcs7(plaintext, key, iv):
    r""" 加密
    plaintext: 明文
    key: 密钥
    iv: 偏移量
    """
    encoder = PKCS7Encoder()
    aes = AES.new(key, AES.MODE_CBC, iv)
    padtext = encoder.encode(plaintext)
    cipherbytes = aes.encrypt(padtext.encode('utf8'))
    ciphertext = base64.b64encode(cipherbytes).decode('utf8')
    return ciphertext

def decrypt_aes_pkcs7(ciphertext, key, iv):
    r""" 解密
    plaintext: 密文
    key: 密钥
    iv: 偏移量
    """
    encoder = PKCS7Encoder()
    aes = AES.new(key, AES.MODE_CBC, iv)
    cipherbytes = base64.b64decode(ciphertext.encode('utf8'))
    padtext = aes.decrypt(cipherbytes).decode('utf8')
    plaintext = encoder.decode(padtext)   
    return plaintext

if __name__ == '__main__':
    key = b'1CF28E8DBB1F36F9DE50C06ADFFD942B'
    iv = key[0:16]
    timestamp = time.time()

    print('timestamp: %f (%s)' % 
            (timestamp, time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(timestamp))))
    plaintext = "%s*%s" % (timestamp, r'walker snapshot')
    print('plaintext: %s' % plaintext)
    print('key: %s' % key)
    print('iv: %s' % iv)

    assert(plaintext == decrypt_aes_pkcs7(encrypt_aes_pkcs7(plaintext, key, iv), key, iv))
    
    ciphertext = encrypt_aes_pkcs7(plaintext, key, iv)
    print('ciphertext: %s' % ciphertext)