Python使用AES进行盐值加密和解密

方法一：抽象类版

import base64
from Crypto.Cipher import AES


class EncryptDate:
    def __init__(self, key):
        self.key = key.encode('utf-8')  # 初始化密钥
        self.length = AES.block_size  # 初始化数据块大小
        self.aes = AES.new(self.key, AES.MODE_ECB)  # 初始化AES,ECB模式的实例
        # 截断函数，去除填充的字符
        self.unpad = lambda date: date[0:-ord(date[-1])]

    def pad(self, text):
        """
        #填充函数，使被加密数据的字节码长度是block_size的整数倍
        """
        count = len(text.encode('utf-8'))
        add = self.length - (count % self.length)
        entext = text + (chr(add) * add)
        return entext

    def encrypt(self, encrData):  # 加密函数
        res = self.aes.encrypt(self.pad(encrData).encode("utf8"))
        msg = str(base64.b64encode(res), encoding="utf8")
        return msg

    def decrypt(self, decrData):  # 解密函数
        res = base64.decodebytes(decrData.encode("utf8"))
        msg = self.aes.decrypt(res).decode("utf8")
        return self.unpad(msg)


if __name__ == '__main__':
    text = '你是个小可爱'  # 待加密文本
    key = 'psjduiofnhsychs7'  # 密钥长度是16的倍数

    eg = EncryptDate(key) 

    res = eg.encrypt(text)  # 加密函数
    print("加密res:", res)

    res = eg.decrypt(res)  # 解密函数
    print("解密res", res)

 

方法二：单独函数版

import base64
from Crypto.Cipher import AES


def encrypt(key_str, text_str):
    aes_size = AES.block_size
    count = len(text_str.encode("utf-8"))
    add = aes_size - (count % aes_size)
    text_str = text_str + (chr(add) * add)
    res = AES.new(key_str.encode("utf-8"), AES.MODE_ECB).encrypt(text_str.encode("utf-8"))
    enc_str = str(base64.b64encode(res), encoding="utf8").replace("\r\n", "").replace("+", "/add/")
    return enc_str


def decrypt(key_str, enc_str):
    res = base64.decodebytes(enc_str.encode("utf8"))
    msg = AES.new(key_str.encode("utf-8"), AES.MODE_ECB).decrypt(res).decode("utf8")
    unpad = lambda date: date[0:-ord(date[-1])]
    return unpad(msg)


if __name__ == "__main__":
    key_str = "8k6djkfhj78gfg65"  # 盐值长度16的倍数
    text_str = '你是个小可爱'  # 待加密的文本
    print("待加密文本： ", text_str)

    enc = encrypt(key_str, text_str)
    print("加密文本：", enc)

    dec = decrypt(key_str, enc)
    print("解密文本：", dec)