import CryptoJS from "crypto-js";

const DataEncrypt = function () {
    this.key = CryptoJS.enc.Base64.parse(process.env.MIX_APP_KEY.substr(7));
}

DataEncrypt.prototype.encrypt = function (data) {
    let iv = CryptoJS.lib.WordArray.random(16);
    let encrypted = CryptoJS.AES.encrypt(data, this.key, {
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    }).toString();

    iv = CryptoJS.enc.Base64.stringify(iv);

    let result = {
        iv: iv,
        value: encrypted,
        mac: CryptoJS.HmacSHA256(iv + encrypted, key).toString()
    }

    result = CryptoJS.enc.Utf8.parse(JSON.stringify(result));

    return CryptoJS.enc.Base64.stringify(result);
};

DataEncrypt.prototype.decrypt = function (encryptStr) {
    let str = JSON.parse(atob(encryptStr)),
        iv = CryptoJS.enc.Base64.parse(str.iv);

    return CryptoJS.AES.decrypt(str.value, this.key, {
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    }).toString(CryptoJS.enc.Utf8);
};

export default DataEncrypt;

################################################################################
// 使用：
// .env 文件中增加
MIX_APP_KEY=${APP_KEY}

import DataEncrypt from "dataEncrypt";

methods:{
    handelDecrypt() {
        let dataDecrypt = new DataEncrypt();
        return JSON.parse(dataDecrypt.decrypt(this.data));
    },
    handelEncrypt() {
        let dataDecrypt = new DataEncrypt();
        return JSON.parse(dataDecrypt.decrypt(this.data));
    }
}