From d3c86d00163bba1a57d1f597995721b8badbce62 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@prodromou.name>
Date: Thu, 28 Aug 2008 22:39:19 -0400
Subject: [PATCH] add CSRF protection to avatar

darcs-hash:20080829023919-84dde-38e4bf6bddc120a221af5f856d9f88b7a532096b.gz
---
 actions/avatar.php | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/actions/avatar.php b/actions/avatar.php
index ebfbd72952..9f397e93c3 100644
--- a/actions/avatar.php
+++ b/actions/avatar.php
@@ -58,6 +58,7 @@ class AvatarAction extends SettingsAction {
 										   'id' => 'avatar',
 										   'action' =>
 										   common_local_url('avatar')));
+		common_hidden('token', common_session_token());
 		common_element('input', array('name' => 'MAX_FILE_SIZE',
 									  'type' => 'hidden',
 									  'id' => 'MAX_FILE_SIZE',
@@ -72,6 +73,14 @@ class AvatarAction extends SettingsAction {
 
 	function handle_post() {
 
+		# CSRF protection
+
+		$token = $this->trimmed('token');
+		if (!$token || $token != common_session_token()) {
+			$this->show_form(_('There was a problem with your session token. Try again, please.'));
+			return;
+		}
+
 		switch ($_FILES['avatarfile']['error']) {
 		 case UPLOAD_ERR_OK: # success, jump out
 			break;