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* backport the actual code change from https://github.com/pyca/cryptography/pull/5747 without the docs and CI changes (which aren't applicable on old 2.8 version) and backport 2 older changes to make this fix applicable on 2.8. Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From 6d0a76521abe287f5ddb5cd1cfbc799d35f08cf9 Mon Sep 17 00:00:00 2001
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From: Alex Gaynor <alex.gaynor@gmail.com>
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Date: Sun, 7 Feb 2021 11:36:56 -0500
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Subject: [PATCH] correct buffer overflows cause by integer overflow in openssl
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(#5747)
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* correct buffer overflows cause by integer overflow in openssl
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frustratingly, there is no test for this -- that's because testing this
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requires allocating more memory than is available in CI.
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fixes #5615.
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* backport CI fixes
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* another CI backport
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Upstream-Status: Backport [https://github.com/pyca/cryptography/commit/82b6ce28389f0a317bc55ba2091a74b346db7cae]
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Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
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---
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src/cryptography/hazmat/backends/openssl/ciphers.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
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index 2b7da80c..7ef5f1ea 100644
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--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
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+++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
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@@ -17,7 +17,7 @@ from cryptography.hazmat.primitives.ciphers import modes
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class _CipherContext(object):
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_ENCRYPT = 1
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_DECRYPT = 0
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- _MAX_CHUNK_SIZE = 2 ** 31 - 1
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+ _MAX_CHUNK_SIZE = 2 ** 30 - 1
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def __init__(self, backend, cipher, mode, operation):
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self._backend = backend
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