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From 6d0a76521abe287f5ddb5cd1cfbc799d35f08cf9 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sun, 7 Feb 2021 11:36:56 -0500
Subject: [PATCH] correct buffer overflows cause by integer overflow in openssl
(#5747)
* correct buffer overflows cause by integer overflow in openssl
frustratingly, there is no test for this -- that's because testing this
requires allocating more memory than is available in CI.
fixes #5615.
* backport CI fixes
* another CI backport
Upstream-Status: Backport [https://github.com/pyca/cryptography/commit/82b6ce28389f0a317bc55ba2091a74b346db7cae]
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
src/cryptography/hazmat/backends/openssl/ciphers.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
index 2b7da80c..7ef5f1ea 100644
--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
+++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
@@ -17,7 +17,7 @@ from cryptography.hazmat.primitives.ciphers import modes
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
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