使用crypto-js可以实现，完整示例代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" />
</head>
<body>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/crypto-js.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/aes.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/mode-cfb.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/pad-nopadding.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/lib-typedarrays.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/enc-base64.js"></script>
<script src="//repo.bfw.wiki/bfwrepo/js/crypto-js.4.1.1/enc-u8array.js"></script>
<script>
// 服务端提供的32位key
var akey = [0x26,0xAF,0xE2,0x1A,0x0C,0x16,0x73,0x54,0x13,0xFD,0x68,0xDD,0x8F,0xA0,0xB7,0xC1,0x57,0xA6,0x90,0xFF,0xCD,0xB3,0x54,0x61,0x10,0x07,0xD5,0x7E,0xDB,0x1E,0x4C,0xE9];
// 服务端提供的16位iv
var aiv = [0x15,0x4C,0xD3,0x55,0xFE,0xA1,0xFF,0x01,0x00,0x34,0xAB,0x22,0x08,0x4F,0x13,0x07];
// 将key和iv转换成uint8数组
var keyBv = new Uint8Array(akey);
var ivBv = new Uint8Array(aiv);
// 将key和iv转换成WordArray
keyWA = CryptoJS.enc.u8array.parse(keyBv);
ivWA = CryptoJS.enc.u8array.parse(ivBv);
// 解密方法 传入密文的uint8数组
function decryptU8arry(array) {
var acontent = array;
// 将密文转换成WordArray
contentWA = CryptoJS.enc.u8array.parse(acontent);
// 插件要求密文是base64格式
var dcBase64String = contentWA.toString(CryptoJS.enc.Base64);
// 解密 选定mode是CFB类型，无偏移量
var decrypted = CryptoJS.AES.decrypt(dcBase64String, keyWA, { iv: ivWA,mode:CryptoJS.mode.CFB,padding:CryptoJS.pad.NoPadding});
// 将解密后的明文转回uint8数组
var bv = CryptoJS.enc.u8array.stringify(decrypted);
return bv;
}
// 加密方法 传入明文的uint8数组
function encryptU8arry(array) {
var acontent = array;
// 将明文转换成WordArray
contentWA = CryptoJS.enc.u8array.parse(acontent);
// 插件要求明文是base64格式
var dcBase64String = contentWA.toString(CryptoJS.enc.Base64);
// 加密 选定mode是CFB类型，无偏移量
var encrypted = CryptoJS.AES.encrypt(contentWA, keyWA, { iv: ivWA,mode:CryptoJS.mode.CFB,padding:CryptoJS.pad.NoPadding});
// 将密文转回uint8数组
var bv = CryptoJS.enc.u8array.stringify(encrypted.ciphertext);
return bv;
}
//由此可以对二进制流进行加密解密了：
var aData = [0,1,2,3,4];
var dv = new Uint8Array(aData);
var enu8 = encryptU8arry(dv); // 加密后的二进制流
console.log("CryptoJS AES 二进制加密："+enu8);
var deu8 = decryptU8arry(enu8); // 解密后的二进制流
console.log("CryptoJS AES 二进制解密："+deu8);
</script>
</body>
</html>
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