74 lines
2.2 KiB
JavaScript
74 lines
2.2 KiB
JavaScript
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(function (exports) {
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'use strict';
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exports.sha1Hmac = function (key, bytes) {
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if (!window.Unibabel) {
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throw new Error("Unibabel.js is required to convert between buffers and binary strings");
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}
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if ('string' === typeof key) {
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throw new Error("use one of Unibabel.utf8ToBuffer(key), Unibabel.base64ToBuffer(key), or Unibabel.hexToBuffer(key) before passing to sha1Hmac(key, bytes)");
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}
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var Unibabel = window.Unibabel;
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if (window.crypto) {
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return window.crypto.subtle.importKey(
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"raw"
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, key
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, { name: "HMAC"
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, hash: { name: "SHA-1" }
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}
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, false
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, ["sign", "verify"]
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)
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/*
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return crypto.subtle.importKey(
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"jwk", //can be "jwk" or "raw"
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{ //this is an example jwk key, "raw" would be an ArrayBuffer
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kty: "oct",
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k: "Y0zt37HgOx-BY7SQjYVmrqhPkO44Ii2Jcb9yydUDPfE",
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alg: "HS256",
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ext: true,
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},
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{ //this is the algorithm options
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name: "HMAC",
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hash: {name: "SHA-256"}, //can be "SHA-1", "SHA-256", "SHA-384", or "SHA-512"
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//length: 256, //optional, if you want your key length to differ from the hash function's block length
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},
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false, //whether the key is extractable (i.e. can be used in exportKey)
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["sign", "verify"] //can be any combination of "sign" and "verify"
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)
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*/
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.then(function (key) {
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return window.crypto.subtle.sign(
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{ name: "HMAC" }
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, key // from generateKey or importKey above
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, new Uint8Array(bytes) // ArrayBuffer of data you want to sign
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)
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.then(function(signature){
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// returns an ArrayBuffer containing the signature
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return Unibabel.bufferToHex(new Uint8Array(signature));
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});
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});
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}
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else if (window.forge) {
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var forge = window.forge;
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var hmac = forge.hmac.create();
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var digest;
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hmac.start('sha1', Unibabel.bufferToBinaryString(key));
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hmac.update(Unibabel.bufferToBinaryString(bytes));
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digest = hmac.digest().toHex();
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return window.Promise.resolve(digest);
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}
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else {
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throw new Error("WebCrypto or forge.js is required to create a sha1 hmac");
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}
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};
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}(
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'undefined' !== typeof window ? window : module.exports
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, 'undefined' !== typeof process ? process.env.NODE_ENV : false
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));
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