phpmyadmin/libraries/plugins/auth/AuthenticationCookie.php
Michal Čihař 38b73180fd Fix password change in cookie auth
We can not set same cookie twice, so we have to avoid sending auth
cookie when we're about to change the password.

Signed-off-by: Michal Čihař <michal@cihar.com>
2016-08-02 08:42:44 +02:00

828 lines
26 KiB
PHP

<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Cookie Authentication plugin for phpMyAdmin
*
* @package PhpMyAdmin-Authentication
* @subpackage Cookie
*/
namespace PMA\libraries\plugins\auth;
use phpseclib\Crypt;
use PMA\libraries\Message;
use PMA\libraries\plugins\AuthenticationPlugin;
use PMA\libraries\Response;
use PMA\libraries\Util;
use ReCaptcha\ReCaptcha;
require_once './libraries/session.lib.php';
/**
* Remember where to redirect the user
* in case of an expired session.
*/
if (! empty($_REQUEST['target'])) {
$GLOBALS['target'] = $_REQUEST['target'];
} else if (PMA_getenv('SCRIPT_NAME')) {
$GLOBALS['target'] = basename(PMA_getenv('SCRIPT_NAME'));
}
/**
* Swekey authentication functions.
*/
require './libraries/plugins/auth/swekey/swekey.auth.lib.php';
/**
* Handles the cookie authentication method
*
* @package PhpMyAdmin-Authentication
*/
class AuthenticationCookie extends AuthenticationPlugin
{
/**
* IV for encryption
*/
private $_cookie_iv = null;
/**
* Displays authentication form
*
* this function MUST exit/quit the application
*
* @global string $conn_error the last connection error
*
* @return boolean|void
*/
public function auth()
{
global $conn_error;
$response = Response::getInstance();
if ($response->isAjax()) {
$response->setRequestStatus(false);
// redirect_flag redirects to the login page
$response->addJSON('redirect_flag', '1');
if (defined('TESTSUITE')) {
return true;
} else {
exit;
}
}
// No recall if blowfish secret is not configured as it would produce
// garbage
if ($GLOBALS['cfg']['LoginCookieRecall']
&& ! empty($GLOBALS['cfg']['blowfish_secret'])
) {
$default_user = $GLOBALS['PHP_AUTH_USER'];
$default_server = $GLOBALS['pma_auth_server'];
$autocomplete = '';
} else {
$default_user = '';
$default_server = '';
// skip the IE autocomplete feature.
$autocomplete = ' autocomplete="off"';
}
$response->getFooter()->setMinimal();
$header = $response->getHeader();
$header->setBodyId('loginform');
$header->setTitle('phpMyAdmin');
$header->disableMenuAndConsole();
$header->disableWarnings();
if (@file_exists(CUSTOM_HEADER_FILE)) {
include CUSTOM_HEADER_FILE;
}
echo '
<div class="container">
<a href="';
echo PMA_linkURL('https://www.phpmyadmin.net/');
echo '" target="_blank" class="logo">';
$logo_image = $GLOBALS['pmaThemeImage'] . 'logo_right.png';
if (@file_exists($logo_image)) {
echo '<img src="' , $logo_image
, '" id="imLogo" name="imLogo" alt="phpMyAdmin" border="0" />';
} else {
echo '<img name="imLogo" id="imLogo" src="'
, $GLOBALS['pmaThemeImage'] , 'pma_logo.png' , '" '
, 'border="0" width="88" height="31" alt="phpMyAdmin" />';
}
echo '</a>
<h1>';
echo sprintf(
__('Welcome to %s'),
'<bdo dir="ltr" lang="en">phpMyAdmin</bdo>'
);
echo "</h1>";
// Show error message
if (! empty($conn_error)) {
Message::rawError($conn_error)->display();
} elseif (isset($_GET['session_expired'])
&& intval($_GET['session_expired']) == 1
) {
Message::rawError(
__('Your session has expired. Please log in again.')
)->display();
}
echo "<noscript>\n";
Message::error(
__("Javascript must be enabled past this point!")
)->display();
echo "</noscript>\n";
echo "<div class='hide js-show'>";
// Displays the languages form
if (empty($GLOBALS['cfg']['Lang'])) {
include_once './libraries/display_select_lang.lib.php';
// use fieldset, don't show doc link
echo PMA_getLanguageSelectorHtml(true, false);
}
echo '</div>
<br />
<!-- Login form -->
<form method="post" action="index.php" name="login_form"' , $autocomplete ,
' class="disableAjax login hide js-show">
<fieldset>
<legend>';
echo __('Log in');
echo Util::showDocu('index');
echo '</legend>';
if ($GLOBALS['cfg']['AllowArbitraryServer']) {
echo '
<div class="item">
<label for="input_servername" title="';
echo __(
'You can enter hostname/IP address and port separated by space.'
);
echo '">';
echo __('Server:');
echo '</label>
<input type="text" name="pma_servername" id="input_servername"';
echo ' value="';
echo htmlspecialchars($default_server);
echo '" size="24" class="textfield" title="';
echo __(
'You can enter hostname/IP address and port separated by space.'
); echo '" />
</div>';
}
echo '<div class="item">
<label for="input_username">' , __('Username:') , '</label>
<input type="text" name="pma_username" id="input_username" '
, 'value="' , htmlspecialchars($default_user) , '" size="24"'
, ' class="textfield"/>
</div>
<div class="item">
<label for="input_password">' , __('Password:') , '</label>
<input type="password" name="pma_password" id="input_password"'
, ' value="" size="24" class="textfield" />
</div>';
if (count($GLOBALS['cfg']['Servers']) > 1) {
echo '<div class="item">
<label for="select_server">' . __('Server Choice:') . '</label>
<select name="server" id="select_server"';
if ($GLOBALS['cfg']['AllowArbitraryServer']) {
echo ' onchange="document.forms[\'login_form\'].'
, 'elements[\'pma_servername\'].value = \'\'" ';
}
echo '>';
include_once './libraries/select_server.lib.php';
echo PMA_selectServer(false, false);
echo '</select></div>';
} else {
echo ' <input type="hidden" name="server" value="'
, $GLOBALS['server'] , '" />';
} // end if (server choice)
// Add captcha input field if reCaptcha is enabled
if (!empty($GLOBALS['cfg']['CaptchaLoginPrivateKey'])
&& !empty($GLOBALS['cfg']['CaptchaLoginPublicKey'])
) {
// If enabled show captcha to the user on the login screen.
echo '<script src="https://www.google.com/recaptcha/api.js?hl='
, $GLOBALS['lang'] , '" async defer></script>';
echo '<div class="g-recaptcha" data-sitekey="'
, htmlspecialchars($GLOBALS['cfg']['CaptchaLoginPublicKey']) , '"></div>';
}
echo '</fieldset>
<fieldset class="tblFooters">
<input value="' , __('Go') , '" type="submit" id="input_go" />';
$_form_params = array();
if (! empty($GLOBALS['target'])) {
$_form_params['target'] = $GLOBALS['target'];
}
if (! empty($GLOBALS['db'])) {
$_form_params['db'] = $GLOBALS['db'];
}
if (! empty($GLOBALS['table'])) {
$_form_params['table'] = $GLOBALS['table'];
}
// do not generate a "server" hidden field as we want the "server"
// drop-down to have priority
echo PMA_URL_getHiddenInputs($_form_params, '', 0, 'server');
echo '</fieldset>
</form>';
// BEGIN Swekey Integration
Swekey_login('input_username', 'input_go');
// END Swekey Integration
if ($GLOBALS['error_handler']->hasDisplayErrors()) {
echo '<div id="pma_errors">';
$GLOBALS['error_handler']->dispErrors();
echo '</div>';
}
echo '</div>';
if (@file_exists(CUSTOM_FOOTER_FILE)) {
include CUSTOM_FOOTER_FILE;
}
if (! defined('TESTSUITE')) {
exit;
} else {
return true;
}
}
/**
* Gets advanced authentication settings
*
* this function DOES NOT check authentication - it just checks/provides
* authentication credentials required to connect to the MySQL server
* usually with $GLOBALS['dbi']->connect()
*
* it returns false if something is missing - which usually leads to
* auth() which displays login form
*
* it returns true if all seems ok which usually leads to auth_set_user()
*
* it directly switches to authFails() if user inactivity timeout is reached
*
* @return boolean whether we get authentication settings or not
*/
public function authCheck()
{
global $conn_error;
// Initialization
/**
* @global $GLOBALS['pma_auth_server'] the user provided server to
* connect to
*/
$GLOBALS['pma_auth_server'] = '';
$GLOBALS['PHP_AUTH_USER'] = $GLOBALS['PHP_AUTH_PW'] = '';
$GLOBALS['from_cookie'] = false;
// BEGIN Swekey Integration
if (! Swekey_Auth_check()) {
return false;
}
// END Swekey Integration
if (! empty($_REQUEST['pma_username'])) {
// Verify Captcha if it is required.
if (! empty($GLOBALS['cfg']['CaptchaLoginPrivateKey'])
&& ! empty($GLOBALS['cfg']['CaptchaLoginPublicKey'])
) {
if (! empty($_POST["g-recaptcha-response"])) {
include_once 'libraries/plugins/auth/recaptcha/autoload.php';
$reCaptcha = new ReCaptcha(
$GLOBALS['cfg']['CaptchaLoginPrivateKey']
);
// verify captcha status.
$resp = $reCaptcha->verify(
$_POST["g-recaptcha-response"],
$_SERVER["REMOTE_ADDR"]
);
// Check if the captcha entered is valid, if not stop the login.
if ($resp == null || ! $resp->isSuccess()) {
$conn_error = __('Entered captcha is wrong, try again!');
return false;
}
} else {
$conn_error = __('Please enter correct captcha!');
return false;
}
}
// The user just logged in
$GLOBALS['PHP_AUTH_USER'] = $_REQUEST['pma_username'];
$GLOBALS['PHP_AUTH_PW'] = empty($_REQUEST['pma_password'])
? ''
: $_REQUEST['pma_password'];
if ($GLOBALS['cfg']['AllowArbitraryServer']
&& isset($_REQUEST['pma_servername'])
) {
if ($GLOBALS['cfg']['ArbitraryServerRegexp']) {
$parts = explode(' ', $_REQUEST['pma_servername']);
if (count($parts) == 2) {
$tmp_host = $parts[0];
} else {
$tmp_host = $_REQUEST['pma_servername'];
}
$match = preg_match(
$GLOBALS['cfg']['ArbitraryServerRegexp'], $tmp_host
);
if (! $match) {
$conn_error = __(
'You are not allowed to log in to this MySQL server!'
);
return false;
}
}
$GLOBALS['pma_auth_server'] = $_REQUEST['pma_servername'];
}
PMA_secureSession();
return true;
}
// At the end, try to set the $GLOBALS['PHP_AUTH_USER']
// and $GLOBALS['PHP_AUTH_PW'] variables from cookies
// servername
if ($GLOBALS['cfg']['AllowArbitraryServer']
&& ! empty($_COOKIE['pmaServer-' . $GLOBALS['server']])
) {
$GLOBALS['pma_auth_server']
= $_COOKIE['pmaServer-' . $GLOBALS['server']];
}
// check cookies
if (empty($_COOKIE['pmaUser-' . $GLOBALS['server']])
|| empty($_COOKIE['pma_iv-' . $GLOBALS['server']])
) {
return false;
}
$GLOBALS['PHP_AUTH_USER'] = $this->cookieDecrypt(
$_COOKIE['pmaUser-' . $GLOBALS['server']],
$this->_getEncryptionSecret()
);
// user was never logged in since session start
if (empty($_SESSION['last_access_time'])) {
return false;
}
// User inactive too long
$last_access_time = time() - $GLOBALS['cfg']['LoginCookieValidity'];
if ($_SESSION['last_access_time'] < $last_access_time) {
Util::cacheUnset('is_create_db_priv');
Util::cacheUnset('is_reload_priv');
Util::cacheUnset('db_to_create');
Util::cacheUnset('dbs_where_create_table_allowed');
Util::cacheUnset('dbs_to_test');
Util::cacheUnset('db_priv');
Util::cacheUnset('col_priv');
Util::cacheUnset('table_priv');
Util::cacheUnset('proc_priv');
$GLOBALS['no_activity'] = true;
$this->authFails();
if (! defined('TESTSUITE')) {
exit;
} else {
return false;
}
}
// check password cookie
if (empty($_COOKIE['pmaPass-' . $GLOBALS['server']])) {
return false;
}
$GLOBALS['PHP_AUTH_PW'] = $this->cookieDecrypt(
$_COOKIE['pmaPass-' . $GLOBALS['server']],
$this->_getSessionEncryptionSecret()
);
if ($GLOBALS['PHP_AUTH_PW'] == "\xff(blank)") {
$GLOBALS['PHP_AUTH_PW'] = '';
}
$GLOBALS['from_cookie'] = true;
return true;
}
/**
* Set the user and password after last checkings if required
*
* @return boolean always true
*/
public function authSetUser()
{
global $cfg;
// Ensures valid authentication mode, 'only_db', bookmark database and
// table names and relation table name are used
if ($cfg['Server']['user'] != $GLOBALS['PHP_AUTH_USER']) {
foreach ($cfg['Servers'] as $idx => $current) {
if ($current['host'] == $cfg['Server']['host']
&& $current['port'] == $cfg['Server']['port']
&& $current['socket'] == $cfg['Server']['socket']
&& $current['ssl'] == $cfg['Server']['ssl']
&& $current['connect_type'] == $cfg['Server']['connect_type']
&& $current['user'] == $GLOBALS['PHP_AUTH_USER']
) {
$GLOBALS['server'] = $idx;
$cfg['Server'] = $current;
break;
}
} // end foreach
} // end if
if ($GLOBALS['cfg']['AllowArbitraryServer']
&& ! empty($GLOBALS['pma_auth_server'])
) {
/* Allow to specify 'host port' */
$parts = explode(' ', $GLOBALS['pma_auth_server']);
if (count($parts) == 2) {
$tmp_host = $parts[0];
$tmp_port = $parts[1];
} else {
$tmp_host = $GLOBALS['pma_auth_server'];
$tmp_port = '';
}
if ($cfg['Server']['host'] != $GLOBALS['pma_auth_server']) {
$cfg['Server']['host'] = $tmp_host;
if (! empty($tmp_port)) {
$cfg['Server']['port'] = $tmp_port;
}
}
unset($tmp_host, $tmp_port, $parts);
}
$cfg['Server']['user'] = $GLOBALS['PHP_AUTH_USER'];
$cfg['Server']['password'] = $GLOBALS['PHP_AUTH_PW'];
// Avoid showing the password in phpinfo()'s output
unset($GLOBALS['PHP_AUTH_PW']);
unset($_SERVER['PHP_AUTH_PW']);
if (isset($_REQUEST['access_time'])) {
$_SESSION['last_access_time'] = time() - $_REQUEST['access_time'];
} else {
$_SESSION['last_access_time'] = time();
}
}
/**
* Stores user credentials after successful login.
*
* @return void|bool
*/
public function storeUserCredentials()
{
global $cfg;
$this->createIV();
// Name and password cookies need to be refreshed each time
// Duration = one month for username
$this->storeUsernameCookie($cfg['Server']['user']);
// Duration = as configured
// Do not store password cookie on password change as we will
// set the cookie again after password has been changed
if (! isset($_POST['change_pw'])) {
$this->storePasswordCookie($cfg['Server']['password']);
}
// Set server cookies if required (once per session) and, in this case,
// force reload to ensure the client accepts cookies
if (! $GLOBALS['from_cookie']) {
if ($GLOBALS['cfg']['AllowArbitraryServer']) {
if (! empty($GLOBALS['pma_auth_server'])) {
// Duration = one month for servername
$GLOBALS['PMA_Config']->setCookie(
'pmaServer-' . $GLOBALS['server'],
$cfg['Server']['host']
);
} else {
// Delete servername cookie
$GLOBALS['PMA_Config']->removeCookie(
'pmaServer-' . $GLOBALS['server']
);
}
}
// URL where to go:
$redirect_url = './index.php';
// any parameters to pass?
$url_params = array();
if (mb_strlen($GLOBALS['db'])) {
$url_params['db'] = $GLOBALS['db'];
}
if (mb_strlen($GLOBALS['table'])) {
$url_params['table'] = $GLOBALS['table'];
}
// any target to pass?
if (! empty($GLOBALS['target'])
&& $GLOBALS['target'] != 'index.php'
) {
$url_params['target'] = $GLOBALS['target'];
}
/**
* Clear user cache.
*/
Util::clearUserCache();
Response::getInstance()
->disable();
PMA_sendHeaderLocation(
$redirect_url . PMA_URL_getCommon($url_params, 'text'),
true
);
if (! defined('TESTSUITE')) {
exit;
} else {
return false;
}
} // end if
return true;
}
/**
* Stores username in a cookie.
*
* @param string $username User name
*
* @return void
*/
public function storeUsernameCookie($username)
{
// Name and password cookies need to be refreshed each time
// Duration = one month for username
$GLOBALS['PMA_Config']->setCookie(
'pmaUser-' . $GLOBALS['server'],
$this->cookieEncrypt(
$username,
$this->_getEncryptionSecret()
)
);
}
/**
* Stores password in a cookie.
*
* @param string $password Password
*
* @return void
*/
public function storePasswordCookie($password)
{
// Duration = as configured
$GLOBALS['PMA_Config']->setCookie(
'pmaPass-' . $GLOBALS['server'],
$this->cookieEncrypt(
! empty($password) ? $password : "\xff(blank)",
$this->_getSessionEncryptionSecret()
),
null,
$GLOBALS['cfg']['LoginCookieStore']
);
}
/**
* User is not allowed to login to MySQL -> authentication failed
*
* prepares error message and switches to auth() which display the error
* and the login form
*
* this function MUST exit/quit the application,
* currently done by call to auth()
*
* @return void
*/
public function authFails()
{
global $conn_error;
// Deletes password cookie and displays the login form
$GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $GLOBALS['server']);
$conn_error = $this->getErrorMessage();
$response = Response::getInstance();
// needed for PHP-CGI (not need for FastCGI or mod-php)
$response->header('Cache-Control: no-store, no-cache, must-revalidate');
$response->header('Pragma: no-cache');
$this->auth();
}
/**
* Returns blowfish secret or generates one if needed.
*
* @return string
*/
private function _getEncryptionSecret()
{
if (empty($GLOBALS['cfg']['blowfish_secret'])) {
return $this->_getSessionEncryptionSecret();
} else {
// apply md5() to work around too long secrets (returns 32 characters)
return md5($GLOBALS['cfg']['blowfish_secret']);
}
}
/**
* Returns blowfish secret or generates one if needed.
*
* @return string
*/
private function _getSessionEncryptionSecret()
{
if (empty($_SESSION['encryption_key'])) {
if (self::useOpenSSL()) {
$_SESSION['encryption_key'] = openssl_random_pseudo_bytes(256);
} else {
$_SESSION['encryption_key'] = Crypt\Random::string(256);
}
}
return $_SESSION['encryption_key'];
}
/**
* Checks whether we should use openssl for encryption.
*
* @return boolean
*/
public static function useOpenSSL()
{
return (
function_exists('openssl_encrypt')
&& function_exists('openssl_decrypt')
&& function_exists('openssl_random_pseudo_bytes')
);
}
/**
* Encryption using openssl's AES or phpseclib's AES
* (phpseclib uses mcrypt when it is available)
*
* @param string $data original data
* @param string $secret the secret
*
* @return string the encrypted result
*/
public function cookieEncrypt($data, $secret)
{
if (self::useOpenSSL()) {
return openssl_encrypt(
$data,
'AES-128-CBC',
$secret,
0,
$this->_cookie_iv
);
} else {
$cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
$cipher->setIV($this->_cookie_iv);
$cipher->setKey($secret);
return base64_encode($cipher->encrypt($data));
}
}
/**
* Decryption using openssl's AES or phpseclib's AES
* (phpseclib uses mcrypt when it is available)
*
* @param string $encdata encrypted data
* @param string $secret the secret
*
* @return string original data
*/
public function cookieDecrypt($encdata, $secret)
{
if (is_null($this->_cookie_iv)) {
$this->_cookie_iv = base64_decode(
$_COOKIE['pma_iv-' . $GLOBALS['server']],
true
);
}
if (strlen($this->_cookie_iv) < $this->getIVSize()) {
$this->createIV();
}
if (self::useOpenSSL()) {
return openssl_decrypt(
$encdata,
'AES-128-CBC',
$secret,
0,
$this->_cookie_iv
);
} else {
$cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
$cipher->setIV($this->_cookie_iv);
$cipher->setKey($secret);
return $cipher->decrypt(base64_decode($encdata));
}
}
/**
* Returns size of IV for encryption.
*
* @return int
*/
public function getIVSize()
{
if (self::useOpenSSL()) {
return openssl_cipher_iv_length('AES-128-CBC');
}
$cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
return $cipher->block_size;
}
/**
* Initialization
* Store the initialization vector because it will be needed for
* further decryption. I don't think necessary to have one iv
* per server so I don't put the server number in the cookie name.
*
* @return void
*/
public function createIV()
{
if (self::useOpenSSL()) {
$this->_cookie_iv = openssl_random_pseudo_bytes(
$this->getIVSize()
);
} else {
$this->_cookie_iv = Crypt\Random::string(
$this->getIVSize()
);
}
$GLOBALS['PMA_Config']->setCookie(
'pma_iv-' . $GLOBALS['server'],
base64_encode($this->_cookie_iv)
);
}
/**
* Sets encryption IV to use
*
* @param string $vector The IV
*
* @return void
*/
public function setIV($vector)
{
$this->_cookie_iv = $vector;
}
/**
* Callback when user changes password.
*
* @param string $password New password to set
*
* @return void
*/
public function handlePasswordChange($password)
{
$this->storePasswordCookie($password);
}
/**
* Perform logout
*
* @return void
*/
public function logOut()
{
// -> delete password cookie(s)
if ($GLOBALS['cfg']['LoginCookieDeleteAll']) {
foreach ($GLOBALS['cfg']['Servers'] as $key => $val) {
$GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $key);
if (isset($_COOKIE['pmaPass-' . $key])) {
unset($_COOKIE['pmaPass-' . $key]);
}
}
} else {
$GLOBALS['PMA_Config']->removeCookie(
'pmaPass-' . $GLOBALS['server']
);
if (isset($_COOKIE['pmaPass-' . $GLOBALS['server']])) {
unset($_COOKIE['pmaPass-' . $GLOBALS['server']]);
}
}
parent::logOut();
}
}