如何使用 Crypto Web API 获取 HMAC
如何使用 Crypto Web API (window.crypto
) 在浏览器中获取 HMAC-SHA512(key, data)?
目前我正在使用 CryptoJS 库,它非常简单:
CryptoJS.HmacSHA512("myawesomedata", "mysecretkey").toString();
结果是91c14b8d3bcd48be0488bfb8d96d52db6e5f07e5fc677ced2c12916dc87580961f422f9543c786eebfb5797bc3febf796b929efac5c83b4ec69228927f21a03a
我想摆脱额外的依赖并开始使用 Crypto Web API.我怎样才能得到相同的结果?
解决方案回答我自己的问题.下面的代码返回的结果与 CryptoJS.HmacSHA512("myawesomedata", "mysecretkey").toString();
因为 WebCrypto 是异步的,所以到处都有承诺:
//将字符串转换为 Uint8Array 的编码器var enc = new TextEncoder("utf-8");window.crypto.subtle.importKey("raw",//键的原始格式 - 应该是 Uint8Arrayenc.encode("mysecretkey"),{//算法细节名称:HMAC",哈希:{名称:SHA-512"}},false,//导出 = 假["sign", "verify"]//这个键能做什么).then( 键 => {window.crypto.subtle.sign("HMAC",钥匙,enc.encode("myawesomedata")).then(签名 => {var b = new Uint8Array(签名);var str = Array.prototype.map.call(b, x => ('00'+x.toString(16)).slice(-2)).join("")控制台.log(str);});});
How can I get HMAC-SHA512(key, data) in the browser using Crypto Web API (window.crypto
)?
Currently I am using CryptoJS library and it is pretty simple:
CryptoJS.HmacSHA512("myawesomedata", "mysecretkey").toString();
Result is 91c14b8d3bcd48be0488bfb8d96d52db6e5f07e5fc677ced2c12916dc87580961f422f9543c786eebfb5797bc3febf796b929efac5c83b4ec69228927f21a03a
.
I want to get rid of extra dependencies and start using Crypto Web API instead. How can I get the same result with it?
解决方案Answering my own question. The code below returns the same result as CryptoJS.HmacSHA512("myawesomedata", "mysecretkey").toString();
There are promises everywhere as WebCrypto is asynchronous:
// encoder to convert string to Uint8Array
var enc = new TextEncoder("utf-8");
window.crypto.subtle.importKey(
"raw", // raw format of the key - should be Uint8Array
enc.encode("mysecretkey"),
{ // algorithm details
name: "HMAC",
hash: {name: "SHA-512"}
},
false, // export = false
["sign", "verify"] // what this key can do
).then( key => {
window.crypto.subtle.sign(
"HMAC",
key,
enc.encode("myawesomedata")
).then(signature => {
var b = new Uint8Array(signature);
var str = Array.prototype.map.call(b, x => ('00'+x.toString(16)).slice(-2)).join("")
console.log(str);
});
});
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