hikvision-password-reset-tool

hikvision-password-recovery.js

        function padLeft(str, l, c) { str = str + ""; return Array(l - str.length + 1).join(c || " ") + str }
        function initialize()
        {
            document.getElementById("year").value = new Date().getYear() + 1900;
            document.getElementById("month").value = padLeft(new Date().getMonth() + 1, 2, '0');
            document.getElementById("day").value = padLeft(new Date().getDate(), 2, '0');

            document.getElementById("serialNumber").onchange = GenerateSerialCode;
            document.getElementById("year").onchange = GenerateSerialCode;
            document.getElementById("month").onchange = GenerateSerialCode;
            document.getElementById("day").onchange = GenerateSerialCode;
        }
        function GenerateSerialCode()
        {
            var serialNumber = document.getElementById("serialNumber").value;
            var year = document.getElementById("year").value;
            var month = document.getElementById("month").value;
            var day = document.getElementById("day").value;
            var plainText = serialNumber + year + month + day;

            var magicNumber = 0;
            for (var i = 0; i < plainText.length; i++)
                magicNumber += (plainText.charCodeAt(i) * (i + 1)) ^ (i + 1);

            magicNumber *= 1751873395;
            magicNumber = magicNumber >>> 0; // convert to 32 bit integer

            var magicWord = magicNumber + "";
            var serialCode = "";
            for (var i = 0; i < magicWord.length; i++)
            {
                var c = magicWord.charCodeAt(i);
                if (c < 51)
                    serialCode += String.fromCharCode(c + 33);
                else if (c < 53)
                    serialCode += String.fromCharCode(c + 62);
                else if (c < 55)
                    serialCode += String.fromCharCode(c + 47);
                else if (c < 57)
                    serialCode += String.fromCharCode(c + 66);
                else
                    serialCode += String.fromCharCode(c);
            }

            document.getElementById("output").innerHTML = serialCode;
        }
        window.onload = initialize;