From 962eac3925c7184fb5dc174357823223beba0d85 Mon Sep 17 00:00:00 2001
From: Paul Kehrer <paul.l.kehrer@gmail.com>
Date: Sun, 7 Feb 2021 11:04:43 -0600
Subject: [PATCH] port changelog and fix back to master for CVE-2020-36242

diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
index 2b10681b31..0f96795fdc 100644
--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
+++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
@@ -16,7 +16,7 @@
 class _CipherContext(object):
     _ENCRYPT = 1
     _DECRYPT = 0
-    _MAX_CHUNK_SIZE = 2 ** 31 - 1
+    _MAX_CHUNK_SIZE = 2 ** 30 - 1
 
     def __init__(self, backend, cipher, mode, operation):
         self._backend = backend