* functions/global.php
* functions/strings.php.
*
- * @copyright © 1999-2007 The SquirrelMail Project Team
+ * @copyright 1999-2020 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;
}
* @since 1.5.1
*/
function sqauth_read_password() {
+ global $currentHookName;
+ if ($currentHookName == 'login_verified') global $key;
+
sqgetGlobalVar('key', $key, SQ_COOKIE);
sqgetGlobalVar('onetimepad', $onetimepad,SQ_SESSION);
/**
* 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);
}
}
/**
- * Creates a HMAC digest that can be used for auth purposes
- * See RFCs 2104, 2617, 2831
- * Uses mhash() extension if available
- *
- * @param string $data Data to apply hash function to.
- * @param string $key Optional key, which, if supplied, will be used to
- * calculate data's HMAC.
- * @return string HMAC Digest string
- * @since 1.4.0
- */
+ * Creates a HMAC digest that can be used for authentication purposes
+ * See RFCs 2104, 2617, 2831
+ *
+ * Uses PHP's Hash extension if available (enabled by default in PHP
+ * 5.1.2+ - see http://www.php.net/manual/en/hash.requirements.php
+ * or, if installed on earlier PHP versions, the PECL hash module -
+ * see http://pecl.php.net/package/hash
+ *
+ * Otherwise, will attempt to use the Mhash extension - see
+ * http://www.php.net/manual/en/mhash.requirements.php
+ *
+ * Finally, a fall-back custom implementation is used if none of
+ * the above are available.
+ *
+ * @param string $data The data to be encoded/hashed
+ * @param string $key The (shared) secret key that will be used
+ * to build the keyed hash. This argument is
+ * technically optional, but only for internal
+ * use (when the custom hash implementation is
+ * being used) - external callers should always
+ * specify a value for this argument.
+ *
+ * @return string The HMAC-MD5 digest string
+ * @since 1.4.0
+ *
+ */
function hmac_md5($data, $key='') {
+
+ // use PHP's native Hash extension if possible
+ //
+ if (function_exists('hash_hmac'))
+ return pack('H*', hash_hmac('md5', $data, $key));
+
+
+ // otherwise, use (obsolete) mhash extension if available
+ //
if (extension_loaded('mhash')) {
- if ($key== '') {
- $mhash=mhash(MHASH_MD5,$data);
- } else {
- $mhash=mhash(MHASH_MD5,$data,$key);
- }
+
+ if ($key == '')
+ $mhash = mhash(MHASH_MD5, $data);
+ else
+ $mhash = mhash(MHASH_MD5, $data, $key);
+
return $mhash;
}
- if (!$key) {
- return pack('H*',md5($data));
- }
- $key = str_pad($key,64,chr(0x00));
- if (strlen($key) > 64) {
- $key = pack("H*",md5($key));
- }
- $k_ipad = $key ^ str_repeat(chr(0x36), 64) ;
- $k_opad = $key ^ str_repeat(chr(0x5c), 64) ;
- /* Heh, let's get recursive. */
- $hmac=hmac_md5($k_opad . pack("H*",md5($k_ipad . $data)) );
+
+
+ // or, our own implementation...
+ //
+ if (!$key)
+ return pack('H*', md5($data));
+
+ $key = str_pad($key, 64, chr(0x00));
+
+ if (strlen($key) > 64)
+ $key = pack("H*", md5($key));
+
+ $k_ipad = $key ^ str_repeat(chr(0x36), 64);
+ $k_opad = $key ^ str_repeat(chr(0x5c), 64);
+
+ $hmac = hmac_md5($k_opad . pack('H*', md5($k_ipad . $data)));
+
return $hmac;
+
}
/**
*
* @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,
// directly changing the arguments array contents
// in your plugin e.g., $args[0] = 'new_username';
//
+ // NOTE: there is another hook in class/deliver/Deliver_SMTP.class.php
+ // called "smtp_authenticate" that allows a plugin to run its own
+ // custom authentication routine - this hook here is thus slightly
+ // mis-named but is too old to change. Be careful that you do not
+ // confuse your hook names.
+ //
$temp = array(&$user, &$pass);
do_hook('smtp_auth', $temp);
}
projects / squirrelmail.git / blobdiff