From bcbfc354cf7f0aa1c9b61fc29dff6a577fde1a8b Mon Sep 17 00:00:00 2001
From: Matt Carey <matthew.b.carey@gmail.com>
Date: Wed, 4 Dec 2019 20:37:48 -0500
Subject: [PATCH] Add support for xsalsa20_poly1305_lite

---
 discord/voice_client.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/discord/voice_client.py b/discord/voice_client.py
index f3729c9e6..801c99009 100644
--- a/discord/voice_client.py
+++ b/discord/voice_client.py
@@ -111,9 +111,11 @@ class VoiceClient:
         self._runner = None
         self._player = None
         self.encoder = None
+        self._lite_nonce = 0
 
     warn_nacl = not has_nacl
     supported_modes = (
+        'xsalsa20_poly1305_lite',
         'xsalsa20_poly1305_suffix',
         'xsalsa20_poly1305',
     )
@@ -331,6 +333,16 @@ class VoiceClient:
 
         return header + box.encrypt(bytes(data), nonce).ciphertext + nonce
 
+    def _encrypt_xsalsa20_poly1305_lite(self, header, data):
+        box = nacl.secret.SecretBox(bytes(self.secret_key))
+        nonce = bytearray(24)
+
+        nonce[:4] = struct.pack('>I', self._lite_nonce)
+        self.checked_add('_lite_nonce', 1, 4294967295)
+
+        return header + box.encrypt(bytes(data), bytes(nonce)).ciphertext + nonce[:4]
+
+
     def play(self, source, *, after=None):
         """Plays an :class:`AudioSource`.