* functions/global.php
* functions/strings.php.
*
- * @copyright © 1999-2007 The SquirrelMail Project Team
+ * @copyright 1999-2009 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id$
* @package squirrelmail
* and PAGE_NAME in session and returns false. POST information is saved in
* 'session_expired_post' variable, PAGE_NAME is saved in 'session_expired_location'.
*
+ * This function optionally checks the referrer of this page request. If the
+ * administrator wants to impose a check that the referrer of this page request
+ * is another page on the same domain (otherwise, the page request is likely
+ * the result of a XSS or phishing attack), then they need to specify the
+ * acceptable referrer domain in a variable named $check_referrer in
+ * config/config.php (or the configuration tool) for which the value is
+ * usually the same as the $domain setting (for example:
+ * $check_referrer = 'example.com';
+ * However, in some cases (where proxy servers are in use, etc.), the
+ * acceptable referrer might be different. If $check_referrer is set to
+ * "###DOMAIN###", then the current value of $domain is used (useful in
+ * situations where $domain might change at runtime (when using the Login
+ * Manager plugin to host multiple domains with one SquirrelMail installation,
+ * for example)):
+ * $check_referrer = '###DOMAIN###';
+ * NOTE HOWEVER, that referrer checks are not foolproof - they can be spoofed
+ * by browsers, and some browsers intentionally don't send them, in which
+ * case SquirrelMail silently ignores referrer checks.
+ *
* Script that uses this function instead of is_logged_in() function, must handle user
* level messages.
* @return boolean
* @since 1.5.1
*/
function sqauth_is_logged_in() {
- if ( sqsession_is_registered('user_is_logged_in') ) {
+
+ global $check_referrer, $domain;
+ if (!sqgetGlobalVar('HTTP_REFERER', $referrer, SQ_SERVER)) $referrer = '';
+ if ($check_referrer == '###DOMAIN###') $check_referrer = $domain;
+ if (!empty($check_referrer)) {
+ $ssl_check_referrer = 'https://' . $check_referrer;
+ $plain_check_referrer = 'http://' . $check_referrer;
+ }
+ if (sqsession_is_registered('user_is_logged_in')
+ && (!$check_referrer || empty($referrer)
+ || ($check_referrer && !empty($referrer)
+ && (strpos(strtolower($referrer), strtolower($plain_check_referrer)) === 0
+ || strpos(strtolower($referrer), strtolower($ssl_check_referrer)) === 0)))) {
return true;
}
- // First we store some information in the new session to prevent
- // information-loss.
- $session_expired_post = $_POST;
- $session_expired_location = PAGE_NAME;
- if (!sqsession_is_registered('session_expired_post')) {
- sqsession_register($session_expired_post,'session_expired_post');
- }
- if (!sqsession_is_registered('session_expired_location')) {
- sqsession_register($session_expired_location,'session_expired_location');
- }
- session_write_close();
+ // First we store some information in the new session to prevent
+ // information-loss.
+ $session_expired_post = $_POST;
+ if (defined('PAGE_NAME'))
+ $session_expired_location = PAGE_NAME;
+ else
+ $session_expired_location = '';
+
+ if (!sqsession_is_registered('session_expired_post')) {
+ sqsession_register($session_expired_post,'session_expired_post');
+ }
+ if (!sqsession_is_registered('session_expired_location')) {
+ sqsession_register($session_expired_location,'session_expired_location');
+ }
+
+ session_write_close();
- return false;
+ return false;
}
/**
/**
* Saves or updates user password information
*
- * This function is used to update password information that SquirrelMail
- * stores during existing web session. It does not modify password stored
- * in authentication system used by IMAP server.
+ * This function is used to update the password information that
+ * SquirrelMail stores in the existing PHP session. It does NOT
+ * modify the password stored in the authentication system used
+ * by the IMAP server.
+ *
+ * This function must be called before any html output is started.
+ * Direct access to password information is deprecated. The saved
+ * password information is available only to the SquirrelMail script
+ * that is called/executed AFTER the current one. If your script
+ * needs access to the saved password after a sqauth_save_password()
+ * call, use the returned OTP encrypted key.
*
- * Function must be called before any html output started. Direct access
- * to password information is deprecated. Saved password information is
- * available only to next executed SquirrelMail script. If your script needs
- * access to saved password after sqauth_save_password() call, use returned
- * OTP encrypted key.
* @param string $pass password
- * @return string password encrypted with OTP. In case script wants to access
- * password information before reloading page.
+ *
+ * @return string Password encrypted with OTP. In case the script
+ * wants to access the password information before
+ * the end of its execution.
+ *
* @since 1.5.1
+ *
*/
function sqauth_save_password($pass) {
sqgetGlobalVar('base_uri', $base_uri, SQ_SESSION);
*/
function digest_md5_response ($username,$password,$challenge,$service,$host,$authz='') {
$result=digest_md5_parse_challenge($challenge);
+ //FIXME we should check that $result contains the expected values that we use below
// verify server supports qop=auth
// $qop = explode(",",$result['qop']);
*/
function digest_md5_parse_challenge($challenge) {
$challenge=base64_decode($challenge);
- while (isset($challenge)) {
+ $parsed = array();
+ while (!empty($challenge)) {
if ($challenge{0} == ',') { // First char is a comma, must not be 1st time through loop
$challenge=substr($challenge,1);
}
*
* @param string $user Reference to SMTP username
* @param string $pass Reference to SMTP password (unencrypted)
- * @since 1.5.0
+ * @since 1.4.11
*/
function get_smtp_user(&$user, &$pass) {
global $username, $smtp_auth_mech,
$user = $username;
$pass = sqauth_read_password();
}
+
+ // plugin authors note: override $user or $pass by
+ // directly changing the arguments array contents
+ // in your plugin e.g., $args[0] = 'new_username';
+ //
+ $temp = array(&$user, &$pass);
+ do_hook('smtp_auth', $temp);
}
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