Tails

#3 Updated by kytv 2014-08-07 18:44:54

It’s definitely HTTPSEverywhere, seen in Tails 1.1. With HTTPS Everywhere enabled, check.t.o is accessed. With it disabled, there’s no connection made to check.torproject.org.

#4 Updated by kytv 2014-08-07 18:57:45

I don’t know JS—at all—but this is in the SSLObservatory code:

  65 function SSLObservatory() {
  66   this.prefs = CC["@mozilla.org/preferences-service;1"]
  67         .getService(CI.nsIPrefBranch);
  68 
  69   try {
  70     // Check for torbutton
  71     this.tor_logger = CC["@torproject.org/torbutton-logger;1"]
  72           .getService(CI.nsISupports).wrappedJSObject;
  73     this.torbutton_installed = true;
  74   } catch(e) {
  75     this.torbutton_installed = false;
  76   }
  77 
  78   this.HTTPSEverywhere = CC["@eff.org/https-everywhere;1"]
  79                             .getService(Components.interfaces.nsISupports)
  80                             .wrappedJSObject;
  81 
  82   /* The proxy test result starts out null until the test is attempted.
  83    * This is for UI notification purposes */
  84   this.proxy_test_successful = null;
  85   this.proxy_test_callback = null;
  86   this.cto_url = "https://check.torproject.org/?TorButton=true";
  87   // a regexp to match the above URL
  88   this.cto_regexp = RegExp("^https://check\\.torproject\\.org/");
  89 
  90   this.public_roots = root_ca_hashes;

So (if I’m reading this correctly) if TorButton is installed it tries check.t.o, otherwise it doesn’t…which leads to Torbutton being blamed?