var hexcase = 0;
var b64pad  = "";
var chrsz   = 8;

function hex_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));}
function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));}
function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));}

function core_sha1(x, len){
	x[len >> 5] |= 0x80 << (24 - len % 32);
	x[((len + 64 >> 9) << 4) + 15] = len;

	var w = Array(80);
	var a =  1732584193;
	var b = -271733879;
	var c = -1732584194;
	var d =  271733878;
	var e = -1009589776;

	for(var i = 0; i < x.length; i += 16){
		var olda = a;
		var oldb = b;
		var oldc = c;
		var oldd = d;
		var olde = e;

		for(var j = 0; j < 80; j++){
			if(j < 16) w[j] = x[i + j];
			else w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);

			var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
			e = d; d = c; c = rol(b, 30); b = a; a = t;
		}

		a = safe_add(a, olda);
		b = safe_add(b, oldb);
		c = safe_add(c, oldc);
		d = safe_add(d, oldd);
		e = safe_add(e, olde);
	}

	return Array(a, b, c, d, e);
}

function sha1_ft(t, b, c, d){
	if(t < 20) return (b & c) | ((~b) & d);
	if(t < 40) return b ^ c ^ d;
	if(t < 60) return (b & c) | (b & d) | (c & d);
	return b ^ c ^ d;
}

function sha1_kt(t){
	return (t < 20) ?  1518500249 : (t < 40) ?  1859775393 : (t < 60) ? -1894007588 : -899497514;
}

function core_hmac_sha1(key, data){
	var bkey = str2binb(key);
	if(bkey.length > 16) bkey = core_sha1(bkey, key.length * chrsz);

	var ipad = Array(16), opad = Array(16);
	for(var i = 0; i < 16; i++){
		ipad[i] = bkey[i] ^ 0x36363636;
		opad[i] = bkey[i] ^ 0x5C5C5C5C;
	}

	var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
	return core_sha1(opad.concat(hash), 512 + 160);
}

function safe_add(x, y){
	var lsw = (x & 0xFFFF) + (y & 0xFFFF);
	var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
	return (msw << 16) | (lsw & 0xFFFF);
}

function rol(num, cnt){
	return (num << cnt) | (num >>> (32 - cnt));
}

function str2binb(str){
	var bin = Array();
	var mask = (1 << chrsz) - 1;
	for(var i = 0; i < str.length * chrsz; i += chrsz) bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i%32);
	return bin;
}

function binb2str(bin){
	var str = "";
	var mask = (1 << chrsz) - 1;
	for(var i = 0; i < bin.length * 32; i += chrsz) str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
	return str;
}

function binb2hex(binarray){
	var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
	var str = "";
	for(var i = 0; i < binarray.length * 4; i++) str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) + hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
	return str;
}

function binb2b64(binarray){
	var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	var str = "";
	for(var i = 0; i < binarray.length * 4; i += 3){
		var triplet = (((binarray[i   >> 2] >> 8 * (3 -  i   %4)) & 0xFF) << 16) | (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 ) | ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
		for(var j = 0; j < 4; j++){
			if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
			else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
		}
	}
	return str;
}

String.prototype.trim = function trimString(str){
	str = this!=window ? this : str;
	return str.replace(/^\s*|\s*$/g, "");
};

function doLogon(e){
	var form = document.forms["authForm"];
	var usernameObj     = form.username;
	var raw_passwordObj = form.raw_password;
	var passwordObj     = form.password;

	// Reset previous errors (if any)
	usernameObj.style.backgroundColor     = '';
	raw_passwordObj.style.backgroundColor = '';

	// Check values
	if(usernameObj.value.trim() == ""){
		usernameObj.style.backgroundColor = "#FFF5E8";
		usernameObj.focus();
		if(e && e.preventDefault) e.preventDefault();
		return false;
	}

	if(raw_passwordObj.value.trim() == ""){
		raw_passwordObj.style.backgroundColor = "#FFF5E8";
		raw_passwordObj.focus();
		if(e && e.preventDefault) e.preventDefault();
		return false;
	}

	// Build safe password
	var safe_password     = hex_sha1(sha1key + raw_passwordObj.value.trim());
	passwordObj.value     = safe_password;

	// Overwrite raw password
	var n = raw_passwordObj.value.trim().length;
	var stars = "";
	for(kk=0; kk<n; kk++) stars = stars + "*";

	// Show wait message
	usernameObj.readOnly     = true;
	raw_passwordObj.readOnly = true;
	document.getElementById("authButton").value = "Stai asa...";
	document.getElementById("authButton").disabled = true;

	// Return success
	return true;
}