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  • javascript加密解密方法

    效果图:
    HTML源文件:
    <html>
        
        <body>
            <div>
                <div id="title">
                    <h1>Javascript加密解密工具</h1>
                </div>
                <div id="wrapper">
                    <script type="text/javascript">
                        // <![CDATA[
                        a = 62;
    
                        function encode() {
                            var code = document.getElementById('code').value;
                            code = code.replace(/[\r\n]+/g, '');
                            code = code.replace(/'/g, "\\'");
                            var tmp = code.match(/\b(\w+)\b/g);
                            tmp.sort();
                            var dict = [];
                            var i, t = '';
                            for (var i = 0; i < tmp.length; i++) {
                                if (tmp[i] != t) dict.push(t = tmp[i]);
                            }
                            var len = dict.length;
                            var ch;
                            for (i = 0; i < len; i++) {
                                ch = num(i);
                                code = code.replace(new RegExp('\\b' + dict[i] + '\\b', 'g'), ch);
                                if (ch == dict[i]) dict[i] = '';
                            }
                            document.getElementById('code').value = "eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)d[e(c)]=k[c]||e(c);k=[function(e){return d[e]}];e=function(){return'\\\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}(" + "'" + code + "'," + a + "," + len + ",'" + dict.join('|') + "'.split('|'),0,{}))";
                        }
                        function num(c) {
                            return (c < a ? '' : num(parseInt(c / a))) + ((c = c % a) > 35 ? String.fromCharCode(c + 29) : c.toString(36));
                        }
                        function run() {
                            eval(document.getElementById('code').value);
                        }
                        function decode() {
                            var code = document.getElementById('code').value;
                            code = code.replace(/^eval/, '');
                            document.getElementById('code').value = eval(code);
                        }
                        // ]]>
                    </script>
                    <p>
                        <textarea name="code" cols="90" rows="20" id="code" onblur="if (this.value=='') this.value='alert("hello world");';"
                        onfocus="if (this.value=='alert("hello world");') this.value='';"></textarea>
                    </p>
                    <p>
                        <input onclick="encode()" type="button" value="加密" class="inputbutton">
                        <input onclick="run()" type="button" value="执行" class="inputbutton">
                        <input onclick="decode()" type="button" value="解密" class="inputbutton">
                    </p>
                </div>
            </div>
        </body>
    
    </html>


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  • 原文地址:https://www.cnblogs.com/zhangqs008/p/2802209.html
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