Python 密码学:AES/CBC/PKCS5Padding 加解密

※ 安装依赖

pip3 install pycryptodome

※ Python 源码

from Crypto.Cipher import AES
from base64 import b64decode, b64encode
from config import conf

BLOCK_SIZE = AES.block_size


class AESCipher:

    def __init__(self, key, iv):
        self.key = key
        self.iv = iv

    @staticmethod
    def pad(text):
        return text + (BLOCK_SIZE - len(text.encode()) % BLOCK_SIZE) * chr(BLOCK_SIZE - len(text.encode()) % BLOCK_SIZE)

    @staticmethod
    def un_pad(text):
        return text[:-ord(text[len(text) - 1:])]

    def encrypt(self, text):
        """
        加密
        """
        text = self.pad(text).encode()
        cipher = AES.new(key=self.key.encode(), mode=AES.MODE_CBC, IV=self.iv.encode())
        encrypted_text = cipher.encrypt(text)
        return b64encode(encrypted_text).decode('utf-8')

    def decrypt(self, encrypted_text):
        """
        解密
        """
        encrypted_text = b64decode(encrypted_text)
        cipher = AES.new(key=self.key.encode(), mode=AES.MODE_CBC, IV=self.iv.encode())
        decrypted_text = cipher.decrypt(encrypted_text)
        return self.un_pad(decrypted_text).decode('utf-8')

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