js代码混淆[jjencode/jjdecode]

jjencode/jjdecode是Yosuke HASEGAWA的作品，将JS代码转换成只有符号的字符串，此人还有作品aaencode/aadecode，可以将JS代码转换成常用的网络表情，具体请访问作者个人站点。

jjencode代码如下：

function jjencode( gv, text ) {
    var r="";
    var n;
    var t;
    var b=[ "___", "__$", "_$_", "_$$", "$__", "$_$", "$$_", "$$$", "$___", "$__$", "$_$_", "$_$$", "$$__", "$$_$", "$$$_", "$$$$", ];
    var s = "";
    for( var i = 0; i < text.length; i++ ){
        n = text.charCodeAt( i );
        if( n == 0x22 || n == 0x5c ){
            s += "\\\\\\" + text.charAt( i ).toString(16);
        }else if( (0x21 <= n && n <= 0x2f) || (0x3A <= n && n <= 0x40) || ( 0x5b <= n && n <= 0x60 ) || ( 0x7b <= n && n <= 0x7f ) ){
        //}else if( (0x20 <= n && n <= 0x2f) || (0x3A <= n == 0x40) || ( 0x5b <= n && n <= 0x60 ) || ( 0x7b <= n && n <= 0x7f ) ){
            s += text.charAt( i );
        }else if( (0x30 <= n && n <= 0x39 ) || (0x61 <= n && n <= 0x66 ) ){
            if( s ) r += "\"" + s +"\"+";
            r += gv + "." + b[ n < 0x40 ? n - 0x30 : n - 0x57 ] + "+";
            s="";
        }else if( n == 0x6c ){ // 'l'
            if( s ) r += "\"" + s + "\"+";
            r += "(![]+\"\")[" + gv + "._$_]+";
            s = "";
        }else if( n == 0x6f ){ // 'o'
            if( s ) r += "\"" + s + "\"+";
            r += gv + "._$+";
            s = "";
        }else if( n == 0x74 ){ // 'u'
            if( s ) r += "\"" + s + "\"+";
            r += gv + ".__+";
            s = "";
        }else if( n == 0x75 ){ // 'u'
            if( s ) r += "\"" + s + "\"+";
            r += gv + "._+";
            s = "";
        }else if( n < 128 ){
            if( s ) r += "\"" + s;
            else r += "\"";
            r += "\\\\\"+" + n.toString( 8 ).replace( /[0-7]/g, function(c){ return gv + "."+b[ c ]+"+" } );
            s = "";
        }else{
            if( s ) r += "\"" + s;
            else r += "\"";
            r += "\\\\\"+" + gv + "._+" + n.toString(16).replace( /[0-9a-f]/gi, function(c){ return gv + "."+b[parseInt(c,16)]+"+"} );
            s = "";
        }
    }
    if( s ) r += "\"" + s + "\"+";

    r = 
    gv + "=~[];" + 
    gv + "={___:++" + gv +",$$$$:(![]+\"\")["+gv+"],__$:++"+gv+",$_$_:(![]+\"\")["+gv+"],_$_:++"+
    gv+",$_$$:({}+\"\")["+gv+"],$$_$:("+gv+"["+gv+"]+\"\")["+gv+"],_$$:++"+gv+",$$$_:(!\"\"+\"\")["+
    gv+"],$__:++"+gv+",$_$:++"+gv+",$$__:({}+\"\")["+gv+"],$$_:++"+gv+",$$$:++"+gv+",$___:++"+gv+",$__$:++"+gv+"};"+
    gv+".$_="+
    "("+gv+".$_="+gv+"+\"\")["+gv+".$_$]+"+
    "("+gv+"._$="+gv+".$_["+gv+".__$])+"+
    "("+gv+".$$=("+gv+".$+\"\")["+gv+".__$])+"+
    "((!"+gv+")+\"\")["+gv+"._$$]+"+
    "("+gv+".__="+gv+".$_["+gv+".$$_])+"+
    "("+gv+".$=(!\"\"+\"\")["+gv+".__$])+"+
    "("+gv+"._=(!\"\"+\"\")["+gv+"._$_])+"+
    gv+".$_["+gv+".$_$]+"+
    gv+".__+"+
    gv+"._$+"+
    gv+".$;"+
    gv+".$$="+
    gv+".$+"+
    "(!\"\"+\"\")["+gv+"._$$]+"+
    gv+".__+"+
    gv+"._+"+
    gv+".$+"+
    gv+".$$;"+
    gv+".$=("+gv+".___)["+gv+".$_]["+gv+".$_];"+
    gv+".$("+gv+".$("+gv+".$$+\"\\\"\"+" + r + "\"\\\"\")())();";

    return r;
}

jjdecode代码如下：

function jjdecode(text) {
    var output = '';
    var g = text.match(/([^=])=~\[\];/)[1];
    
    // Building my scope
    var lines = text.match(/([^;]*);/g);

    var lookAhead = false;
    var finalLine = '';
    for(var i in lines) {
        if ( ! lines[i].match(/_.\$\(_.\$\(/) && ! lookAhead) {
            eval(lines[i]);
        } else {
            lookAhead = true;
            finalLine = finalLine + lines[i];
            
            if (i == lines.length - 1) {
                // _.\$\((.*)(\)\(\))
                var re = new RegExp(g + '.\\$\\((.*)(\\)\\(\\))');
                var reString = finalLine.match(re);
                output = eval(reString[1]);
            }
        }
    }
    
    // Here's the main object, hav' fun!
    console.log(eval(g));
    
    return output;
}

demo链接如下：
jjencode    jjdecode