*** Tim Medin *** *** Copyright 2012 by Kevin Johnson and the Laudanum Team *** ******************************************************************************** *** *** This file provides shell access to the system. It is built based on the 2.1 *** version of PHPShell which is Copyright (C) 2000-2005 Martin Geisler *** *** *** Updated by Tim Medin *** ******************************************************************************** *** This program is free software; you can redistribute it and/or *** modify it under the terms of the GNU General Public License *** as published by the Free Software Foundation; either version 2 *** of the License, or (at your option) any later version. *** *** This program is distributed in the hope that it will be useful, *** but WITHOUT ANY WARRANTY; without even the implied warranty of *** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *** GNU General Public License for more details. *** *** You can get a copy of the GNU General Public License from this *** address: http://www.gnu.org/copyleft/gpl.html#SEC1 *** You can also write to the Free Software Foundation, Inc., 59 Temple *** Place - Suite 330, Boston, MA 02111-1307, USA. *** ***************************************************************************** */ // ***************** Config entries below *********************** // IPs are enterable as individual addresses TODO: add CIDR support $allowedIPs = array("192.168.1.55", "12.2.2.2"); # format is "username" => "password" # password is generated using sha1sum as shown below (don't forget the -n, KEVIN!) # echo -n Password1 | sha1sum $users = array("kevin" => "b441ac06613fc8d63795be9ad0beaf55011936ac", "tim" => "a94a1fe5ccb19ba61c4c0873d391e987982fbbd3", "yomamma" => "a94a1fe5ccb19ba61c4c0873d391e987982fbbd3"); # *********** No editable content below this line ************** $allowed = 0; foreach ($allowedIPs as $IP) { if ($_SERVER["REMOTE_ADDR"] == $IP) $allowed = 1; } if ($allowed == 0) { header("HTTP/1.0 404 Not Found"); die(); } /* This error handler will turn all notices, warnings, and errors into fatal * errors, unless they have been suppressed with the @-operator. */ function error_handler($errno, $errstr, $errfile, $errline, $errcontext) { /* The @-opertor (used with chdir() below) temporarely makes * error_reporting() return zero, and we don't want to die in that case. * We do note the error in the output, though. */ if (error_reporting() == 0) { $_SESSION['output'] .= $errstr . "\n"; } else { die(' Laudanum PHP Shell Access

Fatal Error!

' . $errstr . '

in ' . $errfile . ', line ' . $errline . '.

'); } } set_error_handler('error_handler'); function logout() { $_SESSION = array('authenticated' => false); if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time()-42000, '/'); session_destroy(); } function stripslashes_deep($value) { if (is_array($value)) return array_map('stripslashes_deep', $value); else return stripslashes($value); } if (get_magic_quotes_gpc()) $_POST = stripslashes_deep($_POST); /* Initialize some variables we need again and again. */ $username = isset($_POST['username']) ? $_POST['username'] : ''; $password = isset($_POST['password']) ? $_POST['password'] : ''; $nounce = isset($_POST['nounce']) ? $_POST['nounce'] : ''; $command = isset($_POST['command']) ? $_POST['command'] : ''; $rows = isset($_POST['rows']) ? $_POST['rows'] : 24; $columns = isset($_POST['columns']) ? $_POST['columns'] : 80; ///* Default settings --- these settings should always be set to something. */ //$default_settings = array('home-directory' => '.'); ///* Merge settings. */ //$ini['settings'] = array_merge($default_settings, $ini['settings']); session_start(); /* Delete the session data if the user requested a logout. This leaves the * session cookie at the user, but this is not important since we * authenticates on $_SESSION['authenticated']. */ if (isset($_POST['logout'])) logout(); ///* Attempt authentication. */ //if (isset($_SESSION['nounce']) && $nounce == $_SESSION['nounce'] && // isset($ini['users'][$username])) { // if (strchr($ini['users'][$username], ':') === false) { // // No seperator found, assume this is a password in clear text. // $_SESSION['authenticated'] = ($ini['users'][$username] == $password); // } else { // list($fkt, $salt, $hash) = explode(':', $ini['users'][$username]); // $_SESSION['authenticated'] = ($fkt($salt . $password) == $hash); // } //} /* Attempt authentication. */ if (isset($_SESSION['nounce']) && $nounce == $_SESSION['nounce'] && isset($users[$username])) $_SESSION['authenticated'] = ($users[$username] == hash("sha1", $password)); /* Enforce default non-authenticated state if the above code didn't set it * already. */ if (!isset($_SESSION['authenticated'])) $_SESSION['authenticated'] = false; if ($_SESSION['authenticated']) { /* Initialize the session variables. */ if (empty($_SESSION['cwd'])) { $_SESSION['cwd'] = '.'; $_SESSION['history'] = array(); $_SESSION['output'] = ''; } if (!empty($command)) { /* Save the command for late use in the JavaScript. If the command is * already in the history, then the old entry is removed before the * new entry is put into the list at the front. */ if (($i = array_search($command, $_SESSION['history'])) !== false) unset($_SESSION['history'][$i]); array_unshift($_SESSION['history'], $command); /* Now append the commmand to the output. */ $_SESSION['output'] .= '$ ' . $command . "\n"; /* Initialize the current working directory. */ if (preg_match('/^[[:blank:]]*cd[[:blank:]]*$/', $command)) { $_SESSION['cwd'] = realpath($ini['settings']['home-directory']); } elseif (preg_match('/^[[:blank:]]*cd[[:blank:]]+([^;]+)$/', $command, $regs)) { /* The current command is a 'cd' command which we have to handle * as an internal shell command. */ if ($regs[1]{0} == '/') { /* Absolute path, we use it unchanged. */ $new_dir = $regs[1]; } else { /* Relative path, we append it to the current working * directory. */ $new_dir = $_SESSION['cwd'] . '/' . $regs[1]; } /* Transform '/./' into '/' */ while (strpos($new_dir, '/./') !== false) $new_dir = str_replace('/./', '/', $new_dir); /* Transform '//' into '/' */ while (strpos($new_dir, '//') !== false) $new_dir = str_replace('//', '/', $new_dir); /* Transform 'x/..' into '' */ while (preg_match('|/\.\.(?!\.)|', $new_dir)) $new_dir = preg_replace('|/?[^/]+/\.\.(?!\.)|', '', $new_dir); if ($new_dir == '') $new_dir = '/'; /* Try to change directory. */ if (@chdir($new_dir)) { $_SESSION['cwd'] = $new_dir; } else { $_SESSION['output'] .= "cd: could not change to: $new_dir\n"; } } elseif (trim($command) == 'exit') { logout(); } else { /* The command is not an internal command, so we execute it after * changing the directory and save the output. */ chdir($_SESSION['cwd']); // We canot use putenv() in safe mode. if (!ini_get('safe_mode')) { // Advice programs (ls for example) of the terminal size. putenv('ROWS=' . $rows); putenv('COLUMNS=' . $columns); } /* Alias expansion. */ $length = strcspn($command, " \t"); $token = substr($command, 0, $length); if (isset($ini['aliases'][$token])) $command = $ini['aliases'][$token] . substr($command, $length); $io = array(); $p = proc_open($command, array(1 => array('pipe', 'w'), 2 => array('pipe', 'w')), $io); /* Read output sent to stdout. */ while (!feof($io[1])) { $_SESSION['output'] .= htmlspecialchars(fgets($io[1]), ENT_COMPAT, 'UTF-8'); } /* Read output sent to stderr. */ while (!feof($io[2])) { $_SESSION['output'] .= htmlspecialchars(fgets($io[2]), ENT_COMPAT, 'UTF-8'); } fclose($io[1]); fclose($io[2]); proc_close($p); } } /* Build the command history for use in the JavaScript */ if (empty($_SESSION['history'])) { $js_command_hist = '""'; } else { $escaped = array_map('addslashes', $_SESSION['history']); $js_command_hist = '"", "' . implode('", "', $escaped) . '"'; } } ?> Laudanum Shell