cookie.auth.lib.php

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 * @global  array     the array of cookie variables if register_globals is
 *                    off
 * @global  string    the servername sent by the login form
 * @global  string    the username sent by the login form
 * @global  string    the password sent by the login form
 * @global  string    the username of the user who logs out
 * @global  boolean   whether the login/password pair is grabbed from a
 *                    cookie or not
 *
 * @return  boolean   whether we get authentication settings or not
 *
 * @access  public
 */
function PMA_auth_check()
{
    global $PHP_AUTH_USER, $PHP_AUTH_PW, $pma_auth_server;
    global $pma_servername, $pma_username, $pma_password, $old_usr, $server;
    global $from_cookie;

    // avoid an error in mcrypt
    if (empty($GLOBALS['cfg']['blowfish_secret'])) {
        return false;
    }

    // Initialization
    $PHP_AUTH_USER = $PHP_AUTH_PW = '';
    $from_cookie   = false;
    $from_form     = false;

    // The user wants to be logged out -> delete password cookie(s)
    if (!empty($old_usr)) {
        if ($GLOBALS['cfg']['LoginCookieDeleteAll']) {
            foreach($GLOBALS['cfg']['Servers'] as $key => $val) {
                setcookie('pma_cookie_password-' . $key, '', 0, $GLOBALS['cookie_path'], '', $GLOBALS['is_https']);
            }
        } else {
            setcookie('pma_cookie_password-' . $server, '', 0, $GLOBALS['cookie_path'], '', $GLOBALS['is_https']);
        }
    }

    // The user just logged in
    elseif (!empty($pma_username)) {
        $PHP_AUTH_USER = $pma_username;
        $PHP_AUTH_PW   = (empty($pma_password)) ? '' : $pma_password;
        if ($GLOBALS['cfg']['AllowArbitraryServer']) {
            $pma_auth_server = $pma_servername;
        }
        $from_form     = true;
    }

    // At the end, try to set the $PHP_AUTH_USER & $PHP_AUTH_PW variables
    // from cookies whatever are the values of the 'register_globals' and
    // the 'variables_order' directives
    else {
        if ($GLOBALS['cfg']['AllowArbitraryServer']) {
            // servername
            if (!empty($pma_cookie_servername)) {
                $pma_auth_server = $pma_cookie_servername;
                $from_cookie   = true;
            } elseif (!empty($_COOKIE) && isset($_COOKIE['pma_cookie_servername-' . $server])) {
                $pma_auth_server = $_COOKIE['pma_cookie_servername-' . $server];
                $from_cookie   = true;
            }
        }

        // username
        if (!empty($_COOKIE) && isset($_COOKIE['pma_cookie_username-' . $server])) {
            $PHP_AUTH_USER = $_COOKIE['pma_cookie_username-' . $server];
            $from_cookie   = true;
        }
        $decrypted_user = PMA_blowfish_decrypt($PHP_AUTH_USER, $GLOBALS['cfg']['blowfish_secret']);
        if (!empty($decrypted_user)) {
            $pos = strrpos($decrypted_user, ':');
            $PHP_AUTH_USER = substr($decrypted_user, 0, $pos);
            $decrypted_time = (int)substr($decrypted_user, $pos + 1);
        } else {
            $decrypted_time = 0;
        }

        // User inactive too long
        if ($decrypted_time > 0 && $decrypted_time < $GLOBALS['current_time'] - $GLOBALS['cfg']['LoginCookieValidity']) {
            // Display an error message only if the inactivity has lasted
            // less than 4 times the timeout value. This is to avoid
            // alerting users with a error after "much" time has passed,
            // for example next morning.
            if ($decrypted_time > $GLOBALS['current_time'] - ($GLOBALS['cfg']['LoginCookieValidity'] * 4)) {
                $GLOBALS['no_activity'] = true;
                PMA_auth_fails();
            }
            return false;
        }

        // password
        if (!empty($pma_cookie_password)) {
            $PHP_AUTH_PW   = $pma_cookie_password;
        } elseif (!empty($_COOKIE) && isset($_COOKIE['pma_cookie_password-' . $server])) {
            $PHP_AUTH_PW   = $_COOKIE['pma_cookie_password-' . $server];
        } else {
            $from_cookie   = false;
        }
        $PHP_AUTH_PW = PMA_blowfish_decrypt($PHP_AUTH_PW, $GLOBALS['cfg']['blowfish_secret'] . $decrypted_time);

        if ($PHP_AUTH_PW == "\xff(blank)") {
            $PHP_AUTH_PW   = '';
        }
    }

    // Returns whether we get authentication settings or not
    if (!$from_cookie && !$from_form) {
        return false;
    } elseif ($from_cookie) {
        return true;
    } else {
        // we don't need to strip here, it is done in grab_globals
        return true;
    }
} // end of the 'PMA_auth_check()' function


/**
 * Set the user and password after last checkings if required
 *
 * @global  array     the valid servers settings
 * @global  integer   the id of the current server
 * @global  array     the current server settings
 * @global  string    the current username
 * @global  string    the current password
 * @global  boolean   whether the login/password pair has been grabbed from
 *                    a cookie or not
 *
 * @return  boolean   always true
 *
 * @access  public
 */
function PMA_auth_set_user()
{
    global $cfg, $server;
    global $PHP_AUTH_USER, $PHP_AUTH_PW, $pma_auth_server;
    global $from_cookie;

    // Ensures valid authentication mode, 'only_db', bookmark database and
    // table names and relation table name are used
    if ($cfg['Server']['user'] != $PHP_AUTH_USER) {
        $servers_cnt = count($cfg['Servers']);
        for ($i = 1; $i <= $servers_cnt; $i++) {
            if (isset($cfg['Servers'][$i])
                && ($cfg['Servers'][$i]['host'] == $cfg['Server']['host'] && $cfg['Servers'][$i]['user'] == $PHP_AUTH_USER)) {
                $server        = $i;
                $cfg['Server'] = $cfg['Servers'][$i];
                break;
            }
        } // end for
    } // end if

    $pma_server_changed = false;
    if ($GLOBALS['cfg']['AllowArbitraryServer']
            && isset($pma_auth_server) && !empty($pma_auth_server)
            && ($cfg['Server']['host'] != $pma_auth_server)
            ) {
        $cfg['Server']['host'] = $pma_auth_server;
        $pma_server_changed = true;
    }
    $cfg['Server']['user']     = $PHP_AUTH_USER;
    $cfg['Server']['password'] = $PHP_AUTH_PW;

    // Name and password cookies needs to be refreshed each time
    // Duration = one month for username
    setcookie('pma_cookie_username-' . $server,
        PMA_blowfish_encrypt($cfg['Server']['user'] . ':' . $GLOBALS['current_time'],
            $GLOBALS['cfg']['blowfish_secret']),
        time() + (60 * 60 * 24 * 30),
        $GLOBALS['cookie_path'], '',
        $GLOBALS['is_https']);

    // Duration = till the browser is closed for password (we don't want this to be saved)
    setcookie('pma_cookie_password-' . $server,
        PMA_blowfish_encrypt(!empty($cfg['Server']['password']) ? $cfg['Server']['password'] : "\xff(blank)",
            $GLOBALS['cfg']['blowfish_secret'] . $GLOBALS['current_time']),
        $GLOBALS['cfg']['LoginCookieStore'],
        $GLOBALS['cookie_path'], '',
        $GLOBALS['is_https']);

    // Set server cookies if required (once per session) and, in this case, force
    // reload to ensure the client accepts cookies
    if (!$from_cookie) {
        if ($GLOBALS['cfg']['AllowArbitraryServer']) {
            if (isset($pma_auth_server) && !empty($pma_auth_server) && $pma_server_changed) {
                // Duration = one month for serverrname
                setcookie('pma_cookie_servername-' . $server,
                    $cfg['Server']['host'],
                    time() + (60 * 60 * 24 * 30),
                    $GLOBALS['cookie_path'], '',
                    $GLOBALS['is_https']);
            } else {
                // Delete servername cookie
                setcookie('pma_cookie_servername-' . $server, '', 0, $GLOBALS['cookie_path'], '', $GLOBALS['is_https']);
            }
        }

        // URL where to go:
        $redirect_url = $cfg['PmaAbsoluteUri'] . 'index.php';

        // any parameters to pass?
        $url_params = array();
        if ( isset($GLOBALS['db']) && strlen($GLOBALS['db']) ) {
            $url_params['db'] = $GLOBALS['db'];
        }
        if ( isset($GLOBALS['table']) && strlen($GLOBALS['table']) ) {
            $url_params['table'] = $GLOBALS['table'];
        }
        // Language change from the login panel needs to be remembered
        if ( ! empty($GLOBALS['lang']) ) {
            $url_params['lang'] = $GLOBALS['lang'];
        }
        // any target to pass?
        if ( ! empty($GLOBALS['target']) && $GLOBALS['target'] != 'index.php' ) {
            $url_params['target'] = $GLOBALS['target'];
        }

        define('PMA_COMING_FROM_COOKIE_LOGIN',1);
        PMA_sendHeaderLocation( $redirect_url . PMA_generate_common_url( $url_params, '&' ) );
        exit();
    } // end if

    return true;
} // end of the 'PMA_auth_set_user()' function


/**
 * User is not allowed to login to MySQL -> authentication failed
 *
 * @return  boolean   always true (no return indeed)
 *
 * @access  public
 */
function PMA_auth_fails()
{
    global $conn_error, $server;

    // Deletes password cookie and displays the login form
    setcookie('pma_cookie_password-' . $server, '', 0, $GLOBALS['cookie_path'], '', $GLOBALS['is_https']);

    if (isset($GLOBALS['allowDeny_forbidden']) && $GLOBALS['allowDeny_forbidden']) {
        $conn_error = $GLOBALS['strAccessDenied'];
    } elseif (isset($GLOBALS['no_activity']) && $GLOBALS['no_activity']) {
        $conn_error = sprintf($GLOBALS['strNoActivity'], $GLOBALS['cfg']['LoginCookieValidity']);
        // Remember where we got timeout to return on same place
        if (PMA_getenv('SCRIPT_NAME')) {
            $GLOBALS['target'] = basename(PMA_getenv('SCRIPT_NAME'));
        }
    } elseif (PMA_DBI_getError()) {
        $conn_error = PMA_sanitize(PMA_DBI_getError());
    } elseif (isset($php_errormsg)) {
        $conn_error = $php_errormsg;
    } else {
        $conn_error = $GLOBALS['strCannotLogin'];
    }

    PMA_auth();

    return true;
} // end of the 'PMA_auth_fails()' function

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