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Use of HMAC-SHA256 in the Stanford Javascript Crypto Library (view at http://rawgit.com/declank/689b972dbcbfd3ccc12c/raw/sjcl.html)
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<!doctype html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
</head> | |
<body> | |
<h1>Demo of <a href="http://bitwiseshiftleft.github.io/sjcl/" target="_blank">Stanford Javascript Crypto Library</a></h1> | |
<p>Generates HMAC using SHA-256</p> | |
<input type="text" id="key" value="key"><br> | |
<input type="text" id="message" value="The quick brown fox jumps over the lazy dog"><br> | |
<button id="encrypt">Encrypt</button><br> | |
<output id="output"></output> | |
<script src="//cdnjs.cloudflare.com/ajax/libs/sjcl/1.0.0/sjcl.min.js"></script> | |
<script> | |
var encryptButton = document.getElementById("encrypt"); | |
encryptButton.addEventListener('click', function(event) { | |
'use strict'; | |
if(typeof sjcl === 'undefined') { | |
alert("Please wait for library to load..."); | |
} else { | |
var key = document.getElementById("key").value; | |
var message = document.getElementById('message').value; | |
var hmac = new sjcl.misc.hmac(sjcl.codec.utf8String.toBits(key)); | |
var output = ""; | |
output += "Key: " + key + "<br>"; | |
output += "Message: " + message + '<br>'; | |
output += "HMAC: 0x" + sjcl.codec.hex.fromBits(hmac.encrypt(message)) + '<br>'; | |
document.getElementById('output').innerHTML = output; | |
} | |
}); | |
</script> | |
</body> | |
</html> |
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