解密ASP源代码(5)

        val +=  (digits[string.substr(1,1).charCodeAt(0)] & 0xf) << 12
        val += ((digits[string.substr(2,1).charCodeAt(0)] >> 2) << 8)
        val += ((digits[string.substr(2,1).charCodeAt(0)] & 0x3) << 22)
        val +=  (digits[string.substr(3,1).charCodeAt(0)] << 16)
        return val
    }

    function strdec(encodingString)
    {

        var marker = "#@~^"
        var stringIndex = 0
        var scriptIndex = -1
        var unEncodingIndex = 0
        var char = null
        var encodingLength = unEncodinglength = 0
        var state = STATE_COPY_INPUT
        var unEncodingString = ""
        var re, arr

        while(state)
        {
            switch (state)
            {
                case (STATE_COPY_INPUT) :
                    scriptIndex = encodingString.indexOf(marker, stringIndex)
                    if (scriptIndex != -1)
                    {
                        unEncodingString += encodingString.substring(stringIndex, scriptIndex)
                        scriptIndex += marker.length
                        state = STATE_READLEN