from Crypto.Cipher import DES3
import base64

class EncryptDate:
    def __init__(self, key):
        self.key = key  # 初始化密钥
        self.length = DES3.block_size  # 初始化数据块大小
        self.aes = DES3.new(self.key, DES3.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")
        # msg =  res.hex()
        return msg

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

if __name__ == '__main__':
    cr = EncryptDate('590479591067ADANBgkqhkiG')
    cr_res = cr.encrypt('{\n "agentId": "128811",\n "company": "",\n "shipId": "4304288748955"\n}')
    de_res = cr.decrypt(cr_res)
    print(de_res)

 

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