From e81e70937f5b6f8f98bdd8e6f71af030486efab8 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Sun, 29 Sep 2024 10:51:56 -0400
Subject: [PATCH] Add ability to decode base64 in `urlskip=`

Related case:
https://github.com/uBlockOrigin/uAssets/issues/25467

New step: `-base64`
Purpose: to decode base64-encoded output of previous step
---
 src/js/static-net-filtering.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index e5e9017d2..f5b184175 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -5441,6 +5441,11 @@ function urlSkip(urlin, steps) {
                 urlin = urlout = `https://${s}`;
                 continue;
             }
+            // Decode base64
+            if ( step === '-base64' ) {
+                urlin = urlout = self.atob(urlin);
+                continue;
+            }
             // Unknown directive
             return;
         }