function calcPass (pass, nonce) {
	var flag = true;
	var num1 = 0x0;
	var num2 = 0x0;
	var password = parseInt(pass, 10);
	
	for (var c in nonce) {
		c = nonce[c];
		if (c!='0') {
			if (flag) num2 = password;
			flag = false;
		}
		switch (c) {
			case '1':
				num1 = num2 & 0xFFFFFF80;
				num1 = num1 >>> 7;
				num2 = num2 << 25;
				num1 = num1 + num2;
				break;
			case '2':
				num1 = num2 & 0xFFFFFFF0;
				num1 = num1 >>> 4;
				num2 = num2 << 28;
				num1 = num1 + num2;
				break;
			case '3':
				num1 = num2 & 0xFFFFFFF8;
				num1 = num1 >>> 3;
				num2 = num2 << 29;
				num1 = num1 + num2;
				break;
			case '4':
				num1 = num2 << 1;
				num2 = num2 >>> 31;
				num1 = num1 + num2;
				break;
			case '5':
				num1 = num2 << 5;
				num2 = num2 >>> 27;
				num1 = num1 + num2;
				break;
			case '6':
				num1 = num2 << 12;
				num2 = num2 >>> 20;
				num1 = num1 + num2;
				break;
			case '7':
				num1 = num2 & 0x0000FF00;
				num1 = num1 + (( num2 & 0x000000FF ) << 24 );
				num1 = num1 + (( num2 & 0x00FF0000 ) >>> 16 );
				num2 = ( num2 & 0xFF000000 ) >>> 8;
				num1 = num1 + num2;
				break;
			case '8':
				num1 = num2 & 0x0000FFFF;
				num1 = num1 << 16;
				num1 = num1 + ( num2 >>> 24 );
				num2 = num2 & 0x00FF0000;
				num2 = num2 >>> 8;
				num1 = num1 + num2;
				break;
			case '9':
				num1 = ~num2;
				break;
			case '0':
				num1 = num2;
				break;
		}
		num2 = num1;
	}
	return (num1 >>> 0).toString();
}

exports.calcPass = calcPass;

console.log ('openpass initialization');
function testCalcPass (pass, nonce, expected) {
	var res = calcPass (pass, nonce);
	var m = pass + ' ' + nonce + ' ' + res + ' ' + expected;
	if (res == parseInt(expected, 10))
		console.log ('PASS '+m);
	else
		console.log ('FAIL '+m);
}

testCalcPass ('12345', '603356072', '25280520');
testCalcPass ('12345', '410501656', '119537670');
testCalcPass ('12345', '630292165', '4269684735');
testCalcPass ('12345', '523781130', '537331200');