在前端登录记住密码的时候需要前端来进行加密工作，接触到crypto这个js，使用还算简单，在这里记录一下
在vue框架中
安装crypto-js

npm install crypto-js --save-dev

utils.js

import CryptoJS from 'crypto-js'

function getAesString(data,key,iv){//加密
    var key  = CryptoJS.enc.Utf8.parse(key);
    var iv   = CryptoJS.enc.Utf8.parse(iv);
    var encrypted =CryptoJS.AES.encrypt(data,key,
        {
            iv:iv,
            mode:CryptoJS.mode.CBC,
            padding:CryptoJS.pad.Pkcs7
        });
    return encrypted.toString();    //返回的是base64格式的密文
}
function getDAesString(encrypted,key,iv){//解密
    var key  = CryptoJS.enc.Utf8.parse(key);
    var iv   = CryptoJS.enc.Utf8.parse(iv);
    var decrypted =CryptoJS.AES.decrypt(encrypted,key,
        {
            iv:iv,
            mode:CryptoJS.mode.CBC,
            padding:CryptoJS.pad.Pkcs7
        });
    return decrypted.toString(CryptoJS.enc.Utf8);     
}

/**
 * CryptoJS加密
 */
var getAES = function(data){ //加密
    var key  = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';  //密钥
    var iv   = '1234567812345678';
    var encrypted = getAesString(data,key,iv); //密文
    var encrypted1 = CryptoJS.enc.Utf8.parse(encrypted);
    return encrypted;
}

/**
 * CryptoJS解密
 */
var getDAes = function(data){//解密
    var key  = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';  //密钥
    var iv   = '1234567812345678';
    var decryptedStr = getDAesString(data,key,iv);
    return decryptedStr;
}

/**
 * 存储localStorage
 */
var setStore = (name, content) => {
    if (!name) return;
    if (typeof content !== 'string') {
        content = JSON.stringify(content);
    }
    window.localStorage.setItem(name, content);
}

/**
 * 获取localStorage
 */
var getStore = name => {
    if (!name) return;
    return window.localStorage.getItem(name);
}

/**
 * 删除localStorage
 */
var removeStore = name => {
    if (!name) return;
    window.localStorage.removeItem(name);
}
export default {
    getAES,
    getDAes,
    setStore,
    getStore,
    removeStore
}

component

<script>
import utils from '@/utils';
export default {
    methods: {
        remember() {
            try {
                let data = utils.getAES(JSON.stringify(this.formData));
                utils.setStore('loginInfo', data);
            } catch (err) {
                console.log(err)
            }
        },
        getRemember() {
            try {
                let crptyData = utils.getStore('loginInfo');
                if (crptyData) {
                    let data = utils.getDAes(crptyData);
                    this.formData = JSON.parse(data);
                } else {}
            } catch (err) {
                console.error(err.message);
            }
        },
        notRemember() {
            let data = utils.getStore('loginInfo');
            if (data) {
                utils.removeStore('loginInfo');
            }
        }
    }
}

</script>

key和iv都可以更换，但是需要保证的是加解密的key和iv保持一致