moebius#223: Consider blocking top level window data: URIs (part 1/3 without tests)

https://github.com/MoonchildProductions/moebius/pull/223

2 files changed, 14 insertions, 0 deletions

diff --git a/netwerk/base/nsIOService.cpp b/netwerk/base/nsIOService.cpp
index 0da79c18ae..8b7f31f99d 100644
--- a/netwerk/base/nsIOService.cpp
+++ b/netwerk/base/nsIOService.cpp
@@ -173,6 +173,8 @@ uint32_t   nsIOService::gDefaultSegmentCount = 24;
 
 bool nsIOService::sTelemetryEnabled = false;
 
+bool nsIOService::sBlockToplevelDataUriNavigations = false;
+
 ////////////////////////////////////////////////////////////////////////////////
 
 nsIOService::nsIOService()
@@ -251,6 +253,8 @@ nsIOService::Init()
         NS_WARNING("failed to get observer service");
 
     Preferences::AddBoolVarCache(&sTelemetryEnabled, "toolkit.telemetry.enabled", false);
+    Preferences::AddBoolVarCache(&sBlockToplevelDataUriNavigations,
+                                 "security.data_uri.block_toplevel_data_uri_navigations", false);
     Preferences::AddBoolVarCache(&mOfflineMirrorsConnectivity, OFFLINE_MIRRORS_CONNECTIVITY, true);
 
     gIOService = this;
@@ -1876,5 +1880,11 @@ nsIOService::SpeculativeAnonymousConnect2(nsIURI *aURI,
     return SpeculativeConnectInternal(aURI, aPrincipal, aCallbacks, true);
 }
 
+/*static*/ bool
+nsIOService::BlockToplevelDataUriNavigations()
+{
+  return sBlockToplevelDataUriNavigations;
+}
+
 } // namespace net
 } // namespace mozilla
diff --git a/netwerk/base/nsIOService.h b/netwerk/base/nsIOService.h
index 7ac23b7910..e592c4d1c9 100644
--- a/netwerk/base/nsIOService.h
+++ b/netwerk/base/nsIOService.h
@@ -95,6 +95,8 @@ public:
 
     bool IsLinkUp();
 
+    static bool BlockToplevelDataUriNavigations();
+
     // Used to trigger a recheck of the captive portal status
     nsresult RecheckCaptivePortal();
 private:
@@ -176,6 +178,8 @@ private:
 
     static bool                          sTelemetryEnabled;
 
+    static bool                          sBlockToplevelDataUriNavigations;
+
     // These timestamps are needed for collecting telemetry on PR_Connect,
     // PR_ConnectContinue and PR_Close blocking time.  If we spend very long
     // time in any of these functions we want to know if and what network