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-rw-r--r--engine/lib/actions.php73
-rw-r--r--htaccess_dist8
-rw-r--r--languages/en.php1
3 files changed, 59 insertions, 23 deletions
diff --git a/engine/lib/actions.php b/engine/lib/actions.php
index f78ca63df..56936f582 100644
--- a/engine/lib/actions.php
+++ b/engine/lib/actions.php
@@ -74,8 +74,7 @@ function action($action, $forwarder = "") {
);
if (!in_array($action, $exceptions)) {
- // All actions require a token.
- action_gatekeeper();
+ action_gatekeeper($action);
}
$forwarder = str_replace(elgg_get_site_url(), "", $forwarder);
@@ -188,6 +187,26 @@ function elgg_unregister_action($action) {
}
/**
+ * Is the token timestamp within acceptable range?
+ *
+ * @param int $ts timestamp from the CSRF token
+ *
+ * @return bool
+ */
+function _elgg_validate_token_timestamp($ts) {
+ $action_token_timeout = elgg_get_config('action_token_timeout');
+ // default is 2 hours
+ $timeout = ($action_token_timeout !== null) ? $action_token_timeout : 2;
+
+ $hour = 60 * 60;
+ $timeout = $timeout * $hour;
+ $now = time();
+
+ // Validate time to ensure its not crazy
+ return ($timeout == 0 || ($ts > $now - $timeout) && ($ts < $now + $timeout));
+}
+
+/**
* Validate an action token.
*
* Calls to actions will automatically validate tokens. If tokens are not
@@ -205,8 +224,6 @@ function elgg_unregister_action($action) {
* @access private
*/
function validate_action_token($visibleerrors = TRUE, $token = NULL, $ts = NULL) {
- global $CONFIG;
-
if (!$token) {
$token = get_input('__elgg_token');
}
@@ -215,29 +232,18 @@ function validate_action_token($visibleerrors = TRUE, $token = NULL, $ts = NULL)
$ts = get_input('__elgg_ts');
}
- if (!isset($CONFIG->action_token_timeout)) {
- // default to 2 hours
- $timeout = 2;
- } else {
- $timeout = $CONFIG->action_token_timeout;
- }
-
$session_id = session_id();
if (($token) && ($ts) && ($session_id)) {
// generate token, check with input and forward if invalid
- $generated_token = generate_action_token($ts);
+ $required_token = generate_action_token($ts);
// Validate token
- if ($token == $generated_token) {
- $hour = 60 * 60;
- $timeout = $timeout * $hour;
- $now = time();
-
- // Validate time to ensure its not crazy
- if ($timeout == 0 || ($ts > $now - $timeout) && ($ts < $now + $timeout)) {
+ if ($token == $required_token) {
+
+ if (_elgg_validate_token_timestamp($ts)) {
// We have already got this far, so unless anything
- // else says something to the contry we assume we're ok
+ // else says something to the contrary we assume we're ok
$returnval = true;
$returnval = elgg_trigger_plugin_hook('action_gatekeeper:permissions:check', 'all', array(
@@ -293,12 +299,33 @@ function validate_action_token($visibleerrors = TRUE, $token = NULL, $ts = NULL)
* This function verifies form input for security features (like a generated token),
* and forwards if they are invalid.
*
+ * @param string $action The action being performed
+ *
* @return mixed True if valid or redirects.
* @access private
*/
-function action_gatekeeper() {
- if (validate_action_token()) {
- return TRUE;
+function action_gatekeeper($action) {
+ if ($action === 'login') {
+ if (validate_action_token(false)) {
+ return true;
+ }
+
+ $token = get_input('__elgg_token');
+ $ts = (int)get_input('__elgg_ts');
+ if ($token && _elgg_validate_token_timestamp($ts)) {
+ // The tokens are present and the time looks valid: this is probably a mismatch due to the
+ // login form being on a different domain.
+ register_error(elgg_echo('actiongatekeeper:crosssitelogin'));
+
+
+ forward('login', 'csrf');
+ }
+
+ // let the validator send an appropriate msg
+ validate_action_token();
+
+ } elseif (validate_action_token()) {
+ return true;
}
forward(REFERER, 'csrf');
diff --git a/htaccess_dist b/htaccess_dist
index 898fa22fb..44d129475 100644
--- a/htaccess_dist
+++ b/htaccess_dist
@@ -112,6 +112,14 @@ RewriteEngine on
#
#RewriteBase /
+
+# If your users receive the message "Sorry, logging in from a different domain is not permitted"
+# you must make sure your login form is served from the same hostname as your site pages.
+# See http://docs.elgg.org/wiki/Login_token_mismatch_error for more info.
+#
+# If you must add RewriteRules to change hostname, add them directly below (above all the others)
+
+
# In for backwards compatibility
RewriteRule ^pg\/([A-Za-z0-9\_\-]+)$ engine/handlers/page_handler.php?handler=$1&%{QUERY_STRING} [L]
RewriteRule ^pg\/([A-Za-z0-9\_\-]+)\/(.*)$ engine/handlers/page_handler.php?handler=$1&page=$2&%{QUERY_STRING} [L]
diff --git a/languages/en.php b/languages/en.php
index 501855f02..a3c6cf2bf 100644
--- a/languages/en.php
+++ b/languages/en.php
@@ -1193,6 +1193,7 @@ You cannot reply to this email.",
'actiongatekeeper:timeerror' => 'The page you were using has expired. Please refresh and try again.',
'actiongatekeeper:pluginprevents' => 'A extension has prevented this form from being submitted.',
'actiongatekeeper:uploadexceeded' => 'The size of file(s) uploaded exceeded the limit set by your site administrator',
+ 'actiongatekeeper:crosssitelogin' => "Sorry, logging in from a different domain is not permitted.",
/**