issue with packer on python module

[ILoveAmphetamines]

Description

I have noticed with the jsbeautifier library for python, certain code does not unpack. An example of this is:

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}('f $7={H:a(2){4 B(9.7.h(y z("(?:(?:^|.*;)\\\\s*"+d(2).h(/[\\-\\.\\+\\*]/g,"\\\\$&")+"\\\\s*\\\\=\\\\s*([^;]*).*$)|^.*$"),"$1"))||G},E:a(2,q,3,6,5,t){k(!2||/^(?:8|r\\-v|o|m|p)$/i.D(2)){4 w}f b="";k(3){F(3.J){j K:b=3===P?"; 8=O, I N Q M:u:u A":"; r-v="+3;n;j L:b="; 8="+3;n;j S:b="; 8="+3.Z();n}}9.7=d(2)+"="+d(q)+b+(5?"; m="+5:"")+(6?"; o="+6:"")+(t?"; p":"");4 x},Y:a(2,6,5){k(!2||!11.C(2)){4 w}9.7=d(2)+"=; 8=12, R 10 W l:l:l A"+(5?"; m="+5:"")+(6?"; o="+6:"");4 x},C:a(2){4(y z("(?:^|;\\\\s*)"+d(2).h(/[\\-\\.\\+\\*]/g,"\\\\$&")+"\\\\s*\\\\=")).D(9.7)},X:a(){f c=9.7.h(/((?:^|\\s*;)[^\\=]+)(?=;|$)|^\\s*|\\s*(?:\\=[^;]*)?(?:\\1|$)/g,"").T(/\\s*(?:\\=[^;]*)?;\\s*/);U(f e=0;e<c.V;e++){c[e]=B(c[e])}4 c}};',62,65,'||sKey|vEnd|return|sDomain|sPath|cookie|expires|document|function|sExpires|aKeys|encodeURIComponent|nIdx|var||replace||case|if|00|domain|break|path|secure|sValue|max||bSecure|59|age|false|true|new|RegExp|GMT|decodeURIComponent|hasItem|test|setItem|switch|null|getItem|31|constructor|Number|String|23|Dec|Fri|Infinity|9999|01|Date|split|for|length|1970|keys|removeItem|toUTCString|Jan|this|Thu'.split('|'),0,{}));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}('h o=\'1A://1z-1y.1x.1w.1v/1u/1t/1s/1r.1q\';h d=s.r(\'d\');h 0=B 1p(d,{\'1o\':{\'1n\':i},\'1m\':\'16:9\',\'D\':1,\'1l\':5,\'1k\':{\'1j\':\'1i\'},1h:[\'7-1g\',\'7\',\'1f\',\'1e-1d\',\'1c\',\'D\',\'1b\',\'1a\',\'19\',\'18\',\'C\',\'17\'],\'C\':{\'15\':i}});8(!A.14()){d.13=o}x{j z={12:11,10:Z,Y:X,W:i,V:i};h c=B A(z);c.U(o);c.T(d);g.c=c}0.3("S",6=>{g.R.Q.P("O")});0.N=1;k v(b,n,m){8(b.y){b.y(n,m,M)}x 8(b.w){b.w(\'3\'+n,m)}}j 4=k(l){g.L.K(l,\'*\')};v(g,\'l\',k(e){j a=e.a;8(a===\'7\')0.7();8(a===\'f\')0.f();8(a===\'u\')0.u()});0.3(\'t\',6=>{4(\'t\')});0.3(\'7\',6=>{4(\'7\')});0.3(\'f\',6=>{4(\'f\')});0.3(\'J\',6=>{4(0.q);s.r(\'.I-H\').G=F(0.q.E(2))});0.3(\'p\',6=>{4(\'p\')});',62,99,'player|||on|sendMessage||event|play|if||data|element|hls|video||pause|window|const|true|var|function|message|eventHandler|eventName|source|ended|currentTime|querySelector|document|ready|stop|bindEvent|attachEvent|else|addEventListener|config|Hls|new|fullscreen|volume|toFixed|String|innerHTML|timestamp|ss|timeupdate|postMessage|parent|false|speed|landscape|lock|orientation|screen|enterfullscreen|attachMedia|loadSource|lowLatencyMode|enableWorker|Infinity|backBufferLength|600|maxMaxBufferLength|180|maxBufferLength|src|isSupported|iosNative||capture|airplay|pip|settings|captions|mute|time|current|progress|large|controls|kwik|key|storage|seekTime|ratio|global|keyboard|Plyr|m3u8|uwu|c989297659739b02ddedf0c686537e7b099e77360263803760baa6aaae30d465|04|stream|org|nextcdn|files|021|na|https'.split('|'),0,{}))

Expected Output

The code should have looked like this after beautification:

var $cookie = {
    getItem: function(sKey) {
        return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null
    },
    setItem: function(sKey, sValue, vEnd, sPath, sDomain, bSecure) {
        if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) {
            return false
        }
        var sExpires = "";
        if (vEnd) {
            switch (vEnd.constructor) {
                case Number:
                    sExpires = vEnd === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + vEnd;
                    break;
                case String:
                    sExpires = "; expires=" + vEnd;
                    break;
                case Date:
                    sExpires = "; expires=" + vEnd.toUTCString();
                    break
            }
        }
        document.cookie = encodeURIComponent(sKey) + "=" + encodeURIComponent(sValue) + sExpires + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "") + (bSecure ? "; secure" : "");
        return true
    },
    removeItem: function(sKey, sPath, sDomain) {
        if (!sKey || !this.hasItem(sKey)) {
            return false
        }
        document.cookie = encodeURIComponent(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "");
        return true
    },
    hasItem: function(sKey) {
        return (new RegExp("(?:^|;\\s*)" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie)
    },
    keys: function() {
        var aKeys = document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g, "").split(/\s*(?:\=[^;]*)?;\s*/);
        for (var nIdx = 0; nIdx < aKeys.length; nIdx++) {
            aKeys[nIdx] = decodeURIComponent(aKeys[nIdx])
        }
        return aKeys
    }
};
const source = 'https://na-021.files.nextcdn.org/stream/04/c989297659739b02ddedf0c686537e7b099e77360263803760baa6aaae30d465/uwu.m3u8';
const video = document.querySelector('video');
const player = new Plyr(video, {
    'keyboard': {
        'global': true
    },
    'ratio': '16:9',
    'volume': 1,
    'seekTime': 5,
    'storage': {
        'key': 'kwik'
    },
    controls: ['play-large', 'play', 'progress', 'current-time', 'mute', 'volume', 'captions', 'settings', 'pip', 'airplay', 'fullscreen', 'capture'],
    'fullscreen': {
        'iosNative': true
    }
});
if (!Hls.isSupported()) {
    video.src = source
} else {
    var config = {
        maxBufferLength: 180,
        maxMaxBufferLength: 600,
        backBufferLength: Infinity,
        enableWorker: true,
        lowLatencyMode: true
    };
    const hls = new Hls(config);
    hls.loadSource(source);
    hls.attachMedia(video);
    window.hls = hls
}
player.on("enterfullscreen", event => {
    window.screen.orientation.lock("landscape")
});
player.speed = 1;

function bindEvent(element, eventName, eventHandler) {
    if (element.addEventListener) {
        element.addEventListener(eventName, eventHandler, false)
    } else if (element.attachEvent) {
        element.attachEvent('on' + eventName, eventHandler)
    }
}
var sendMessage = function(message) {
    window.parent.postMessage(message, '*')
};
bindEvent(window, 'message', function(e) {
    var data = e.data;
    if (data === 'play') player.play();
    if (data === 'pause') player.pause();
    if (data === 'stop') player.stop()
});
player.on('ready', event => {
    sendMessage('ready')
});
player.on('play', event => {
    sendMessage('play')
});
player.on('pause', event => {
    sendMessage('pause')
});
player.on('timeupdate', event => {
    sendMessage(player.currentTime);
    document.querySelector('.ss-timestamp').innerHTML = String(player.currentTime.toFixed(2))
});
player.on('ended', event => {
    sendMessage('ended')
});

Actual Output

The code actually looked like this after beautification:

Traceback (most recent call last):
  File "/home/itori/prettifier/meow.py", line 7, in <module>
    res = jsbeautifier.beautify(meow, opts)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/__init__.py", line 82, in beautify
    return b.beautify(string, opts)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/javascript/beautifier.py", line 185, in beautify
    source_text = self.unpack(source_text, self._options.eval_code)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/javascript/beautifier.py", line 274, in unpack
    return unpackers.run(source, evalcode)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/unpackers/__init__.py", line 50, in run
    source = unpacker.unpack(source)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/unpackers/packer.py", line 72, in unpack
    source = re.sub(r"\b\w+\b", lookup, payload, flags=re.ASCII)
  File "/usr/lib/python3.10/re.py", line 209, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "/home/itori/.local/lib/python3.10/site-packages/jsbeautifier/unpackers/packer.py", line 66, in lookup
    return symtab[unbase(word)] or word
IndexError: list index out of range

Steps to Reproduce

Simply use this code provided above and try to run it

import jsbeautifier

meow = """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}('f $7={H:a(2){4 B(9.7.h(y z("(?:(?:^|.*;)\\\\s*"+d(2).h(/[\\-\\.\\+\\*]/g,"\\\\$&")+"\\\\s*\\\\=\\\\s*([^;]*).*$)|^.*$"),"$1"))||G},E:a(2,q,3,6,5,t){k(!2||/^(?:8|r\\-v|o|m|p)$/i.D(2)){4 w}f b="";k(3){F(3.J){j K:b=3===P?"; 8=O, I N Q M:u:u A":"; r-v="+3;n;j L:b="; 8="+3;n;j S:b="; 8="+3.Z();n}}9.7=d(2)+"="+d(q)+b+(5?"; m="+5:"")+(6?"; o="+6:"")+(t?"; p":"");4 x},Y:a(2,6,5){k(!2||!11.C(2)){4 w}9.7=d(2)+"=; 8=12, R 10 W l:l:l A"+(5?"; m="+5:"")+(6?"; o="+6:"");4 x},C:a(2){4(y z("(?:^|;\\\\s*)"+d(2).h(/[\\-\\.\\+\\*]/g,"\\\\$&")+"\\\\s*\\\\=")).D(9.7)},X:a(){f c=9.7.h(/((?:^|\\s*;)[^\\=]+)(?=;|$)|^\\s*|\\s*(?:\\=[^;]*)?(?:\\1|$)/g,"").T(/\\s*(?:\\=[^;]*)?;\\s*/);U(f e=0;e<c.V;e++){c[e]=B(c[e])}4 c}};',62,65,'||sKey|vEnd|return|sDomain|sPath|cookie|expires|document|function|sExpires|aKeys|encodeURIComponent|nIdx|var||replace||case|if|00|domain|break|path|secure|sValue|max||bSecure|59|age|false|true|new|RegExp|GMT|decodeURIComponent|hasItem|test|setItem|switch|null|getItem|31|constructor|Number|String|23|Dec|Fri|Infinity|9999|01|Date|split|for|length|1970|keys|removeItem|toUTCString|Jan|this|Thu'.split('|'),0,{}));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}('h o=\'1A://1z-1y.1x.1w.1v/1u/1t/1s/1r.1q\';h d=s.r(\'d\');h 0=B 1p(d,{\'1o\':{\'1n\':i},\'1m\':\'16:9\',\'D\':1,\'1l\':5,\'1k\':{\'1j\':\'1i\'},1h:[\'7-1g\',\'7\',\'1f\',\'1e-1d\',\'1c\',\'D\',\'1b\',\'1a\',\'19\',\'18\',\'C\',\'17\'],\'C\':{\'15\':i}});8(!A.14()){d.13=o}x{j z={12:11,10:Z,Y:X,W:i,V:i};h c=B A(z);c.U(o);c.T(d);g.c=c}0.3("S",6=>{g.R.Q.P("O")});0.N=1;k v(b,n,m){8(b.y){b.y(n,m,M)}x 8(b.w){b.w(\'3\'+n,m)}}j 4=k(l){g.L.K(l,\'*\')};v(g,\'l\',k(e){j a=e.a;8(a===\'7\')0.7();8(a===\'f\')0.f();8(a===\'u\')0.u()});0.3(\'t\',6=>{4(\'t\')});0.3(\'7\',6=>{4(\'7\')});0.3(\'f\',6=>{4(\'f\')});0.3(\'J\',6=>{4(0.q);s.r(\'.I-H\').G=F(0.q.E(2))});0.3(\'p\',6=>{4(\'p\')});',62,99,'player|||on|sendMessage||event|play|if||data|element|hls|video||pause|window|const|true|var|function|message|eventHandler|eventName|source|ended|currentTime|querySelector|document|ready|stop|bindEvent|attachEvent|else|addEventListener|config|Hls|new|fullscreen|volume|toFixed|String|innerHTML|timestamp|ss|timeupdate|postMessage|parent|false|speed|landscape|lock|orientation|screen|enterfullscreen|attachMedia|loadSource|lowLatencyMode|enableWorker|Infinity|backBufferLength|600|maxMaxBufferLength|180|maxBufferLength|src|isSupported|iosNative||capture|airplay|pip|settings|captions|mute|time|current|progress|large|controls|kwik|key|storage|seekTime|ratio|global|keyboard|Plyr|m3u8|uwu|c989297659739b02ddedf0c686537e7b099e77360263803760baa6aaae30d465|04|stream|org|nextcdn|files|021|na|https'.split('|'),0,{}))"""
opts = jsbeautifier.default_options()
opts.indent_size = 2
opts.space_in_empty_paren = True
res = jsbeautifier.beautify(meow, opts)
print(res)

Environment

OS: EndeavourOS (Linux Distro)

[amanakhtar78]

Hay there, I am new to open source, can you please mentor me and assign me some new basic issue which I can solve and give back to this open source community.

[bitwiseman]

I'm sorry, I don't have the bandwidth to mentor you at this time.