前端如何加密数据--五种方式（base64加密、md5加密、sha1加密、字符串方法加密、AES加密）_前端base64加密

1.base64加密（包括小写字母a-z、大写字母A-Z、数字0-9、符号"+"、"/"一共64个字符的字符集，另加一个“=”，实际是65个字符）

字符串转换为base64：str64 = window.btoa(str)

base64转换为字符串：str=window.atob(str64)

<script>
    let str = 'helloworld';
    let str64 = window.btoa(str);
    console.log('base64码显示是：' + str64);
    let jm = window.atob(str64);
    console.log('字符串显示是：' + jm);
</script>

2.md5加密

<script src="https://cdn.bootcss.com/blueimp-md5/2.12.0/js/md5.min.js"></script>
 
<script>
    let str = 'helloworld';
    let newStr = md5(str);
    console.log("字符串：",str);
    console.log("加密后的字符串：",newStr);
</script>

3.sha1加密

<script src="https://cdn.bootcss.com/js-sha1/0.6.0/sha1.js"></script>
 <script>
    let str = 'helloworld_sha1';
    let newStr = sha1(str);
    console.log("字符串：",str);
    console.log("加密后的字符串：",newStr);
</script>

4.字符串的编码和解码（JS函数的escape()和unescape()）--对于汉字，数字不适用

<script>
    let str = '喜羊羊美羊羊懒羊羊';
    let newStr = escape(str);
    console.log("字符串：", str);
    console.log("加密：", newStr);
    let newStr2 = unescape(newStr)
    console.log("解密：", newStr2);
</script>

 5.AES加密

脚手架安装：npm install crypto-js

<script src="https://cdn.bootcss.com/crypto-js/3.1.9-1/crypto-js.min.js"></script>
<script type="text/javascript">
    var aseKey = "12345678" //秘钥必须为：8/16/32位
    var message = "13785624612";
    //加密
    var encrypt = CryptoJS.AES.encrypt(message, CryptoJS.enc.Utf8.parse(aseKey), {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7
        }).toString();
    console.log("加密为：",encrypt);
    //解密
    var decrypt = CryptoJS.AES.decrypt(encrypt, CryptoJS.enc.Utf8.parse(aseKey), {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7
        }).toString(CryptoJS.enc.Utf8);
    console.log("解密为：",decrypt); //13785624612
</script>