Full version: jsB@nk » Security » Encryption » QwertyShifter
URL: https://www.javascriptbank.com/qwertyshifter.html
Encoder/decoder for QWERTY-shifted languages.
Full version: jsB@nk » Security » Encryption » QwertyShifter
URL: https://www.javascriptbank.com/qwertyshifter.html
<script type="text/javascript">var qs = new QwertyShifter('right', 1);window.onload = function(){ var f = document.forms['qsForm']; f.direction.value = qs.dir; f.radix.value = qs.rad;}function qs_reset(){ var f = document.forms['qsForm']; var d = f.direction.value.toLowerCase(); if (d != 'left' && d != 'right') { alert("Invalid Direction. Must be 'left' or 'right'."); return; } var r = parseInt(f.radix.value); if (isNaN(r) || r < 1 || r >= qs.qu.length) { alert("Invalid Radix. Must be > 0 and < " + qs.qu.length); return; } qs.reset(d, r); alert("QwertyShifter\n\nNew settings accepted.");}function encode(){ var f = document.forms['qsForm']; f.shifted.value = qs.encode(f.original.value);}function decode(){ var f = document.forms['qsForm']; f.original.value = qs.decode(f.shifted.value);}//------------------------------------------------------// QwertyShifter - Object Prototype and Public Methodsfunction QwertyShifter(direction, radix){ this.dir = direction; // direction to shift: 'left' or 'right' this.rad = radix; // number of chars to shift this.ql = new Array('`','1','2','3','4','5','6','7','8','9','0','-','=','q','w','e','r','t','y','u','i','o','p','[',']','\\','a','s','d','f','g','h','j','k','l',';',"'",'z','x','c','v','b','n','m',",",'.','/',' '); // lower case and unshifted chars this.qu = new Array('~','!','@','#','$','%','^','&','*','(',')','_','+','Q','W','E','R','T','Y','U','I','O','P','{','}','|', 'A','S','D','F','G','H','J','K','L',':','"','Z','X','C','V','B','N','M',"<",'>','?'); // upper case and shifted chars}QwertyShifter.prototype.reset = function(direction, radix){ this.dir = direction; this.rad = radix;}QwertyShifter.prototype.getChr = function(c, act){ var i, qLen=0, qBuf; for (i = 0; i < this.ql.length; ++i) { if (this.ql[i] == c) { qBuf = this.ql; qLen = this.ql.length; break; // out of 'for' loop } } if (!qLen) { for (i = 0; i < this.qu.length; ++i) { if (this.qu[i] == c) { qBuf = this.qu; qLen = this.qu.length; break; // out of 'for' loop } } } if (!qLen) { return c; } if ((act == 'enc' && this.dir == 'right') || (act == 'dec' && this.dir == 'left')) { // shift right if (i + this.rad >= qLen) { i = (i + this.rad) - qLen; // wrap to beginning } else { i += this.rad; } } else if ((act == 'enc' && this.dir == 'left') || (act == 'dec' && this.dir == 'right')) { // shift left if (i - this.rad < 0) { i = qLen + (i - this.rad); // wrap to end } else { i -= this.rad; } } return qBuf[i];}QwertyShifter.prototype.encode = function(s){ var i, buf=''; for (i = 0; i < s.length; ++i) { buf += this.getChr(s.charAt(i), 'enc'); } return buf;}QwertyShifter.prototype.decode = function(s){ var i, buf=''; for (i = 0; i < s.length; ++i) { buf += this.getChr(s.charAt(i), 'dec'); } return buf;}</script><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com--><form name="qsForm" onsubmit="return false"><p><b>Original:</b></p><textarea name="original" rows="8" cols="60"></textarea><input type="button" value="Encode" onclick="encode()"><p><b>QWERTY-Shifted:</b></p><textarea name="shifted" rows="8" cols="60"></textarea><input type="button" value="Decode" onclick="decode()"><p><b>Settings:</b></p><p>Shift Direction <input name="direction" type="text" value="" size="20"></p><p>Shift Amount <input name="radix" type="text" value="" size="20"></p><p><input type="button" value="SET" onclick="qs_reset()"></p></form><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->