, 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 =...= "%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