commit 006708e921a1a93cbc619c6993c30404857d7bcf Author: Jorge Couchet <jorge.couchet@gmail.com> Date: Thu Nov 22 13:08:36 2012 +0100 Checking if the proxy is running in a Tor Proxy and disabling itelf. --- proxy/flashproxy.js | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-) diff --git a/proxy/flashproxy.js b/proxy/flashproxy.js index 2078b69..435b8ea 100644 --- a/proxy/flashproxy.js +++ b/proxy/flashproxy.js @@ -865,6 +865,23 @@ function repr(x) { } } +/* The function is trying to detect that the proxy is running in a Tor Browser. A Tor Browser has + an specific 'navigator.userAgent' string, it is also entirely disabling the DOM storage and + not listing the supported MIME types. + + https://trac.torproject.org/projects/tor/ticket/6293 + +*/ +function is_likely_tor_browser() { + + var isTB = false; + + if ( (navigator.userAgent == "Mozilla/5.0 (Windows NT 6.1; rv:10.0) Gecko/20100101 Firefox/10.0") && (sessionStorage === null) && (navigator.mimeTypes.length == 0) ) + isTB = true; + + return isTB; +} + /* Are circumstances such that we should self-disable and not be a proxy? We take a best-effort guess as to whether this device runs on a battery or the data transfer might be expensive. @@ -876,6 +893,13 @@ function repr(x) { function flashproxy_should_disable() { var ua; + /* If the proxy is running in a Tor Browser there is a possible security problem: + It is reported at: https://trac.torproject.org/projects/tor/ticket/6293 */ + if (is_likely_tor_browser()) { + puts("Disable because is running in a Tor Browser."); + return true; + } + ua = window.navigator.userAgent; if (ua !== null) { var UA_LIST = [