From 7687c8ac6e223a725b3ef8f56f04779bebdc86c5 Mon Sep 17 00:00:00 2001
From: shirt <2660574+shirt-dev@users.noreply.github.com>
Date: Tue, 28 Sep 2021 14:53:24 -0400
Subject: [HLS] Fix decryption issues (#1117)

* Unpad HLS fragments with PKCS#7 according to datatracker.ietf.org/doc/html/rfc8216
* media_sequence should only be incremented in for media fragments
* The native decryption should only be used if ffmpeg is unavailable since it is significantly slower. Closes #1086

Authored by: shirt-dev, pukkandan
---
 yt_dlp/downloader/fragment.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'yt_dlp/downloader/fragment.py')

diff --git a/yt_dlp/downloader/fragment.py b/yt_dlp/downloader/fragment.py
index 31f946792..22134f3b6 100644
--- a/yt_dlp/downloader/fragment.py
+++ b/yt_dlp/downloader/fragment.py
@@ -355,7 +355,8 @@ class FragmentFD(FileDownloader):
             # not what it decrypts to.
             if self.params.get('test', False):
                 return frag_content
-            return aes_cbc_decrypt_bytes(frag_content, decrypt_info['KEY'], iv)
+            decrypted_data = aes_cbc_decrypt_bytes(frag_content, decrypt_info['KEY'], iv)
+            return decrypted_data[:-decrypted_data[-1]]
 
         return decrypt_fragment
 
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