libraries/auth/cookie.auth.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Set of functions used to run cookie based authentication.
   5  *
   6  * @package PhpMyAdmin-Auth-Cookie
   7  */
   8
   9 if (! defined('PHPMYADMIN')) {
  10     exit;
  11 }
  12
  13 /**
  14  * Swekey authentication functions.
  15  */
  16 require './libraries/auth/swekey/swekey.auth.lib.php';
  17
  18 if (function_exists('mcrypt_encrypt')) {
  19     /**
  20      * Uses faster mcrypt library if available
  21      * (as this is not called from anywhere else, put the code in-line
  22      *  for faster execution)
  23      */
  24
  25     /**
  26      * Initialization
  27      * Store the initialization vector because it will be needed for
  28      * further decryption. I don't think necessary to have one iv
  29      * per server so I don't put the server number in the cookie name.
  30      */
  31     if (empty($_COOKIE['pma_mcrypt_iv']) || false === ($iv = base64_decode($_COOKIE['pma_mcrypt_iv'], true))) {
  32         srand((double) microtime() * 1000000);
  33         $td = mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');
  34         if ($td === false) {
  35             die(__('Failed to use Blowfish from mcrypt!'));
  36         }
  37         $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
  38         $GLOBALS['PMA_Config']->setCookie('pma_mcrypt_iv', base64_encode($iv));
  39     }
  40
  41     /**
  42      * Encryption using blowfish algorithm (mcrypt)
  43      *
  44      * @param   string  original data
  45      * @param   string  the secret
  46      *
  47      * @return  string  the encrypted result
  48      *
  49      * @access  public
  50      *
  51      */
  52     function PMA_blowfish_encrypt($data, $secret)
  53     {
  54         global $iv;
  55         return base64_encode(mcrypt_encrypt(MCRYPT_BLOWFISH, $secret, $data, MCRYPT_MODE_CBC, $iv));
  56     }
  57
  58     /**
  59      * Decryption using blowfish algorithm (mcrypt)
  60      *
  61      * @param   string  encrypted data
  62      * @param   string  the secret
  63      *
  64      * @return  string  original data
  65      *
  66      * @access  public
  67      *
  68      */
  69     function PMA_blowfish_decrypt($encdata, $secret)
  70     {
  71         global $iv;
  72         return trim(mcrypt_decrypt(MCRYPT_BLOWFISH, $secret, base64_decode($encdata), MCRYPT_MODE_CBC, $iv));
  73     }
  74
  75 } else {
  76     include_once './libraries/blowfish.php';
  77 }
  78
  79 /**
  80  * Returns blowfish secret or generates one if needed.
  81  *
  82  * @access  public
  83  * @return string
  84  */
  85 function PMA_get_blowfish_secret()
  86 {
  87     if (empty($GLOBALS['cfg']['blowfish_secret'])) {
  88         if (empty($_SESSION['auto_blowfish_secret'])) {
  89             // this returns 23 characters
  90             $_SESSION['auto_blowfish_secret'] = uniqid('', true);
  91         }
  92         return $_SESSION['auto_blowfish_secret'];
  93     } else {
  94         // apply md5() to work around too long secrets (returns 32 characters)
  95         return md5($GLOBALS['cfg']['blowfish_secret']);
  96     }
  97 }
  98
  99 /**
 100  * Displays authentication form
 101  *
 102  * this function MUST exit/quit the application
 103  *
 104  * @global  string    the last connection error
 105  *
 106  * @access  public
 107  */
 108 function PMA_auth()
 109 {
 110     global $conn_error;
 111
 112     /* Perform logout to custom URL */
 113     if (! empty($_REQUEST['old_usr'])
 114      && ! empty($GLOBALS['cfg']['Server']['LogoutURL'])) {
 115         PMA_sendHeaderLocation($GLOBALS['cfg']['Server']['LogoutURL']);
 116         exit;
 117     }
 118
 119     /* No recall if blowfish secret is not configured as it would produce garbage */
 120     if ($GLOBALS['cfg']['LoginCookieRecall'] && !empty($GLOBALS['cfg']['blowfish_secret'])) {
 121         $default_user   = $GLOBALS['PHP_AUTH_USER'];
 122         $default_server = $GLOBALS['pma_auth_server'];
 123         $autocomplete   = '';
 124     } else {
 125         $default_user   = '';
 126         $default_server = '';
 127         // skip the IE autocomplete feature.
 128         $autocomplete   = ' autocomplete="off"';
 129     }
 130
 131     $cell_align = ($GLOBALS['text_dir'] == 'ltr') ? 'left' : 'right';
 132
 133     // Defines the charset to be used
 134     header('Content-Type: text/html; charset=utf-8');
 135
 136     /* HTML header; do not show here the PMA version to improve security */
 137     $page_title = 'phpMyAdmin ';
 138     include './libraries/header_meta_style.inc.php';
 139     // if $page_title is set, this script uses it as the title:
 140     include './libraries/header_scripts.inc.php';
 141     ?>
 142 <script type="text/javascript">
 143 //<![CDATA[
 144 // show login form in top frame
 145 if (top != self) {
 146     window.top.location.href=location;
 147 }
 148 //]]>
 149 </script>
 150 </head>
 151
 152 <body class="loginform">
 153
 154     <?php
 155     if (file_exists(CUSTOM_HEADER_FILE)) {
 156         include CUSTOM_HEADER_FILE;
 157     }
 158     ?>
 159
 160 <div class="container">
 161 <a href="<?php echo PMA_linkURL('http://www.phpmyadmin.net/'); ?>" target="_blank" class="logo"><?php
 162     $logo_image = $GLOBALS['pmaThemeImage'] . 'logo_right.png';
 163     if (@file_exists($logo_image)) {
 164         echo '<img src="' . $logo_image . '" id="imLogo" name="imLogo" alt="phpMyAdmin" border="0" />';
 165     } else {
 166         echo '<img name="imLogo" id="imLogo" src="' . $GLOBALS['pmaThemeImage'] . 'pma_logo.png' . '" '
 167            . 'border="0" width="88" height="31" alt="phpMyAdmin" />';
 168     }
 169     ?></a>
 170 <h1>
 171     <?php
 172     echo sprintf(__('Welcome to %s'),
 173         '<bdo dir="ltr" xml:lang="en">' . $page_title . '</bdo>');
 174     ?>
 175 </h1>
 176     <?php
 177
 178     // Show error message
 179     if (! empty($conn_error)) {
 180         PMA_Message::rawError($conn_error)->display();
 181     }
 182
 183     // Displays the languages form
 184     if (empty($GLOBALS['cfg']['Lang'])) {
 185         include_once './libraries/display_select_lang.lib.php';
 186         // use fieldset, don't show doc link
 187         PMA_select_language(true, false);
 188     }
 189
 190     ?>
 191 <br />
 192 <!-- Login form -->
 193 <form method="post" action="index.php" name="login_form"<?php echo $autocomplete; ?> target="_top" class="login">
 194     <fieldset>
 195     <legend>
 196 <?php
 197     echo __('Log in');
 198     echo '<a href="./Documentation.html" target="documentation" ' .
 199         'title="' . __('phpMyAdmin documentation') . '"> ';
 200     if ($GLOBALS['cfg']['ReplaceHelpImg']) {
 201         echo PMA_getImage('b_help.png', __('phpMyAdmin documentation'));
 202     } else {
 203         echo '(*)';
 204     }
 205     echo '</a>';
 206 ?>
 207 </legend>
 208
 209 <?php if ($GLOBALS['cfg']['AllowArbitraryServer']) { ?>
 210         <div class="item">
 211             <label for="input_servername" title="<?php echo __('You can enter hostname/IP address and port separated by space.'); ?>"><?php echo __('Server:'); ?></label>
 212             <input type="text" name="pma_servername" id="input_servername" value="<?php echo htmlspecialchars($default_server); ?>" size="24" class="textfield" title="<?php echo __('You can enter hostname/IP address and port separated by space.'); ?>" />
 213         </div>
 214 <?php } ?>
 215         <div class="item">
 216             <label for="input_username"><?php echo __('Username:'); ?></label>
 217             <input type="text" name="pma_username" id="input_username" value="<?php echo htmlspecialchars($default_user); ?>" size="24" class="textfield"/>
 218         </div>
 219         <div class="item">
 220             <label for="input_password"><?php echo __('Password:'); ?></label>
 221             <input type="password" name="pma_password" id="input_password" value="" size="24" class="textfield" />
 222         </div>
 223     <?php
 224     if (count($GLOBALS['cfg']['Servers']) > 1) {
 225         ?>
 226         <div class="item">
 227             <label for="select_server"><?php echo __('Server Choice'); ?>:</label>
 228             <select name="server" id="select_server"
 229         <?php
 230         if ($GLOBALS['cfg']['AllowArbitraryServer']) {
 231             echo ' onchange="document.forms[\'login_form\'].elements[\'pma_servername\'].value = \'\'" ';
 232         }
 233         echo '>';
 234
 235         include_once './libraries/select_server.lib.php';
 236         PMA_select_server(false, false);
 237
 238         echo '</select></div>';
 239     } else {
 240         echo '    <input type="hidden" name="server" value="' . $GLOBALS['server'] . '" />';
 241     } // end if (server choice)
 242     ?>
 243     </fieldset>
 244     <fieldset class="tblFooters">
 245         <input value="<?php echo __('Go'); ?>" type="submit" id="input_go" />
 246     <?php
 247     $_form_params = array();
 248     if (! empty($GLOBALS['target'])) {
 249         $_form_params['target'] = $GLOBALS['target'];
 250     }
 251     if (! empty($GLOBALS['db'])) {
 252         $_form_params['db'] = $GLOBALS['db'];
 253     }
 254     if (! empty($GLOBALS['table'])) {
 255         $_form_params['table'] = $GLOBALS['table'];
 256     }
 257     // do not generate a "server" hidden field as we want the "server"
 258     // drop-down to have priority
 259     echo PMA_generate_common_hidden_inputs($_form_params, '', 0, 'server');
 260     ?>
 261     </fieldset>
 262 </form>
 263
 264     <?php
 265
 266     // BEGIN Swekey Integration
 267     Swekey_login('input_username', 'input_go');
 268     // END Swekey Integration
 269
 270     // show the "Cookies required" message only if cookies are disabled
 271     // (we previously tried to set some cookies)
 272     if (empty($_COOKIE)) {
 273         trigger_error(__('Cookies must be enabled past this point.'), E_USER_NOTICE);
 274     }
 275     if ($GLOBALS['error_handler']->hasDisplayErrors()) {
 276         echo '<div>';
 277         $GLOBALS['error_handler']->dispErrors();
 278         echo '</div>';
 279     }
 280     ?>
 281 </div>
 282     <?php
 283     if (file_exists(CUSTOM_FOOTER_FILE)) {
 284         include CUSTOM_FOOTER_FILE;
 285     }
 286     ?>
 287 </body>
 288 </html>
 289     <?php
 290     exit;
 291 } // end of the 'PMA_auth()' function
 292
 293
 294
 295 /**
 296  * Gets advanced authentication settings
 297  *
 298  * this function DOES NOT check authentication - it just checks/provides
 299  * authentication credentials required to connect to the MySQL server
 300  * usually with PMA_DBI_connect()
 301  *
 302  * it returns false if something is missing - which usually leads to
 303  * PMA_auth() which displays login form
 304  *
 305  * it returns true if all seems ok which usually leads to PMA_auth_set_user()
 306  *
 307  * it directly switches to PMA_auth_fails() if user inactivity timout is reached
 308  *
 309  * @todo    AllowArbitraryServer on does not imply that the user wants an
 310  *          arbitrary server, or? so we should also check if this is filled and
 311  *          not only if allowed
 312  *
 313  * @return  boolean   whether we get authentication settings or not
 314  *
 315  * @access  public
 316  */
 317 function PMA_auth_check()
 318 {
 319     // Initialization
 320     /**
 321      * @global $GLOBALS['pma_auth_server'] the user provided server to connect to
 322      */
 323     $GLOBALS['pma_auth_server'] = '';
 324
 325     $GLOBALS['PHP_AUTH_USER'] = $GLOBALS['PHP_AUTH_PW'] = '';
 326     $GLOBALS['from_cookie'] = false;
 327
 328     // BEGIN Swekey Integration
 329     if (! Swekey_auth_check()) {
 330         return false;
 331     }
 332     // END Swekey Integration
 333
 334     if (defined('PMA_CLEAR_COOKIES')) {
 335         foreach ($GLOBALS['cfg']['Servers'] as $key => $val) {
 336             $GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $key);
 337             $GLOBALS['PMA_Config']->removeCookie('pmaServer-' . $key);
 338             $GLOBALS['PMA_Config']->removeCookie('pmaUser-' . $key);
 339         }
 340         return false;
 341     }
 342
 343     if (! empty($_REQUEST['old_usr'])) {
 344         // The user wants to be logged out
 345         // -> delete his choices that were stored in session
 346
 347         // according to the PHP manual we should do this before the destroy:
 348         //$_SESSION = array();
 349         // but we still need some parts of the session information
 350         // in libraries/header_meta_style.inc.php
 351
 352         session_destroy();
 353         // -> delete password cookie(s)
 354         if ($GLOBALS['cfg']['LoginCookieDeleteAll']) {
 355             foreach ($GLOBALS['cfg']['Servers'] as $key => $val) {
 356                 $GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $key);
 357                 if (isset($_COOKIE['pmaPass-' . $key])) {
 358                     unset($_COOKIE['pmaPass-' . $key]);
 359                 }
 360             }
 361         } else {
 362             $GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $GLOBALS['server']);
 363             if (isset($_COOKIE['pmaPass-' . $GLOBALS['server']])) {
 364                 unset($_COOKIE['pmaPass-' . $GLOBALS['server']]);
 365             }
 366         }
 367     }
 368
 369     if (! empty($_REQUEST['pma_username'])) {
 370         // The user just logged in
 371         $GLOBALS['PHP_AUTH_USER'] = $_REQUEST['pma_username'];
 372         $GLOBALS['PHP_AUTH_PW']   = empty($_REQUEST['pma_password']) ? '' : $_REQUEST['pma_password'];
 373         if ($GLOBALS['cfg']['AllowArbitraryServer'] && isset($_REQUEST['pma_servername'])) {
 374             $GLOBALS['pma_auth_server'] = $_REQUEST['pma_servername'];
 375         }
 376         return true;
 377     }
 378
 379     // At the end, try to set the $GLOBALS['PHP_AUTH_USER']
 380     // and $GLOBALS['PHP_AUTH_PW'] variables from cookies
 381
 382     // servername
 383     if ($GLOBALS['cfg']['AllowArbitraryServer']
 384      && ! empty($_COOKIE['pmaServer-' . $GLOBALS['server']])) {
 385         $GLOBALS['pma_auth_server'] = $_COOKIE['pmaServer-' . $GLOBALS['server']];
 386     }
 387
 388     // username
 389     if (empty($_COOKIE['pmaUser-' . $GLOBALS['server']])) {
 390         return false;
 391     }
 392
 393     $GLOBALS['PHP_AUTH_USER'] = PMA_blowfish_decrypt(
 394         $_COOKIE['pmaUser-' . $GLOBALS['server']],
 395         PMA_get_blowfish_secret());
 396
 397     // user was never logged in since session start
 398     if (empty($_SESSION['last_access_time'])) {
 399         return false;
 400     }
 401
 402     // User inactive too long
 403     if ($_SESSION['last_access_time'] < time() - $GLOBALS['cfg']['LoginCookieValidity']) {
 404         PMA_cacheUnset('is_create_db_priv', true);
 405         PMA_cacheUnset('is_process_priv', true);
 406         PMA_cacheUnset('is_reload_priv', true);
 407         PMA_cacheUnset('db_to_create', true);
 408         PMA_cacheUnset('dbs_where_create_table_allowed', true);
 409         $GLOBALS['no_activity'] = true;
 410         PMA_auth_fails();
 411         exit;
 412     }
 413
 414     // password
 415     if (empty($_COOKIE['pmaPass-' . $GLOBALS['server']])) {
 416         return false;
 417     }
 418
 419     $GLOBALS['PHP_AUTH_PW'] = PMA_blowfish_decrypt(
 420         $_COOKIE['pmaPass-' . $GLOBALS['server']],
 421         PMA_get_blowfish_secret());
 422
 423     if ($GLOBALS['PHP_AUTH_PW'] == "\xff(blank)") {
 424         $GLOBALS['PHP_AUTH_PW'] = '';
 425     }
 426
 427     $GLOBALS['from_cookie'] = true;
 428
 429     return true;
 430 } // end of the 'PMA_auth_check()' function
 431
 432
 433 /**
 434  * Set the user and password after last checkings if required
 435  *
 436  * @return  boolean   always true
 437  *
 438  * @access  public
 439  */
 440 function PMA_auth_set_user()
 441 {
 442     global $cfg;
 443
 444     // Ensures valid authentication mode, 'only_db', bookmark database and
 445     // table names and relation table name are used
 446     if ($cfg['Server']['user'] != $GLOBALS['PHP_AUTH_USER']) {
 447         foreach ($cfg['Servers'] as $idx => $current) {
 448             if ($current['host'] == $cfg['Server']['host']
 449              && $current['port'] == $cfg['Server']['port']
 450              && $current['socket'] == $cfg['Server']['socket']
 451              && $current['ssl'] == $cfg['Server']['ssl']
 452              && $current['connect_type'] == $cfg['Server']['connect_type']
 453              && $current['user'] == $GLOBALS['PHP_AUTH_USER']) {
 454                 $GLOBALS['server'] = $idx;
 455                 $cfg['Server']     = $current;
 456                 break;
 457             }
 458         } // end foreach
 459     } // end if
 460
 461     if ($GLOBALS['cfg']['AllowArbitraryServer']
 462      && ! empty($GLOBALS['pma_auth_server'])) {
 463         /* Allow to specify 'host port' */
 464         $parts = explode(' ', $GLOBALS['pma_auth_server']);
 465         if (count($parts) == 2) {
 466             $tmp_host = $parts[0];
 467             $tmp_port = $parts[1];
 468         } else {
 469             $tmp_host = $GLOBALS['pma_auth_server'];
 470             $tmp_port = '';
 471         }
 472         if ($cfg['Server']['host'] != $GLOBALS['pma_auth_server']) {
 473             $cfg['Server']['host'] = $tmp_host;
 474             if (!empty($tmp_port)) {
 475                 $cfg['Server']['port'] = $tmp_port;
 476             }
 477         }
 478         unset($tmp_host, $tmp_port, $parts);
 479     }
 480     $cfg['Server']['user']     = $GLOBALS['PHP_AUTH_USER'];
 481     $cfg['Server']['password'] = $GLOBALS['PHP_AUTH_PW'];
 482
 483     $_SESSION['last_access_time'] = time();
 484
 485     // Name and password cookies need to be refreshed each time
 486     // Duration = one month for username
 487     $GLOBALS['PMA_Config']->setCookie('pmaUser-' . $GLOBALS['server'],
 488         PMA_blowfish_encrypt($cfg['Server']['user'],
 489             PMA_get_blowfish_secret()));
 490
 491     // Duration = as configured
 492     $GLOBALS['PMA_Config']->setCookie('pmaPass-' . $GLOBALS['server'],
 493         PMA_blowfish_encrypt(!empty($cfg['Server']['password']) ? $cfg['Server']['password'] : "\xff(blank)",
 494             PMA_get_blowfish_secret()),
 495         null,
 496         $GLOBALS['cfg']['LoginCookieStore']);
 497
 498     // Set server cookies if required (once per session) and, in this case, force
 499     // reload to ensure the client accepts cookies
 500     if (! $GLOBALS['from_cookie']) {
 501         if ($GLOBALS['cfg']['AllowArbitraryServer']) {
 502             if (! empty($GLOBALS['pma_auth_server'])) {
 503                 // Duration = one month for servername
 504                 $GLOBALS['PMA_Config']->setCookie('pmaServer-' . $GLOBALS['server'], $cfg['Server']['host']);
 505             } else {
 506                 // Delete servername cookie
 507                 $GLOBALS['PMA_Config']->removeCookie('pmaServer-' . $GLOBALS['server']);
 508             }
 509         }
 510
 511         // URL where to go:
 512         $redirect_url = $cfg['PmaAbsoluteUri'] . 'index.php';
 513
 514         // any parameters to pass?
 515         $url_params = array();
 516         if (strlen($GLOBALS['db'])) {
 517             $url_params['db'] = $GLOBALS['db'];
 518         }
 519         if (strlen($GLOBALS['table'])) {
 520             $url_params['table'] = $GLOBALS['table'];
 521         }
 522         // any target to pass?
 523         if (! empty($GLOBALS['target']) && $GLOBALS['target'] != 'index.php') {
 524             $url_params['target'] = $GLOBALS['target'];
 525         }
 526
 527         /**
 528          * whether we come from a fresh cookie login
 529          */
 530         define('PMA_COMING_FROM_COOKIE_LOGIN', true);
 531
 532         /**
 533          * Clear user cache.
 534          */
 535         PMA_clearUserCache();
 536
 537         PMA_sendHeaderLocation($redirect_url . PMA_generate_common_url($url_params, '&'));
 538         exit();
 539     } // end if
 540
 541     return true;
 542 } // end of the 'PMA_auth_set_user()' function
 543
 544
 545 /**
 546  * User is not allowed to login to MySQL -> authentication failed
 547  *
 548  * prepares error message and switches to PMA_auth() which display the error
 549  * and the login form
 550  *
 551  * this function MUST exit/quit the application,
 552  * currently doen by call to PMA_auth()
 553  *
 554  * @access  public
 555  */
 556 function PMA_auth_fails()
 557 {
 558     global $conn_error;
 559
 560     // Deletes password cookie and displays the login form
 561     $GLOBALS['PMA_Config']->removeCookie('pmaPass-' . $GLOBALS['server']);
 562
 563     if (! empty($GLOBALS['login_without_password_is_forbidden'])) {
 564         $conn_error = __('Login without a password is forbidden by configuration (see AllowNoPassword)');
 565     } elseif (! empty($GLOBALS['allowDeny_forbidden'])) {
 566         $conn_error = __('Access denied');
 567     } elseif (! empty($GLOBALS['no_activity'])) {
 568         $conn_error = sprintf(__('No activity within %s seconds; please log in again'), $GLOBALS['cfg']['LoginCookieValidity']);
 569         // Remember where we got timeout to return on same place
 570         if (PMA_getenv('SCRIPT_NAME')) {
 571             $GLOBALS['target'] = basename(PMA_getenv('SCRIPT_NAME'));
 572             // avoid "missing parameter: field" on re-entry
 573             if ('tbl_alter.php' == $GLOBALS['target']) {
 574                 $GLOBALS['target'] = 'tbl_structure.php';
 575             }
 576         }
 577     } elseif (PMA_DBI_getError()) {
 578         $conn_error = '#' . $GLOBALS['errno'] . ' ' . __('Cannot log in to the MySQL server');
 579     } else {
 580         $conn_error = __('Cannot log in to the MySQL server');
 581     }
 582
 583     // needed for PHP-CGI (not need for FastCGI or mod-php)
 584     header('Cache-Control: no-store, no-cache, must-revalidate');
 585     header('Pragma: no-cache');
 586
 587     PMA_auth();
 588 } // end of the 'PMA_auth_fails()' function
 589
 590 ?>