46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
From 9fbf84efc861668755ab645530ec7be9cf3c6696 Mon Sep 17 00:00:00 2001
|
|
From: Alex Gaynor <alex.gaynor@gmail.com>
|
|
Date: Tue, 7 Feb 2023 11:34:18 -0500
|
|
Subject: [PATCH] Don't allow update_into to mutate immutable objects (#8230)
|
|
|
|
---
|
|
src/cryptography/hazmat/backends/openssl/ciphers.py | 2 +-
|
|
tests/hazmat/primitives/test_ciphers.py | 8 ++++++++
|
|
2 files changed, 9 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
|
|
index d5b6010..a5737dc 100644
|
|
--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
|
|
+++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
|
|
@@ -155,7 +155,7 @@ class _CipherContext(object):
|
|
data_processed = 0
|
|
total_out = 0
|
|
outlen = self._backend._ffi.new("int *")
|
|
- baseoutbuf = self._backend._ffi.from_buffer(buf)
|
|
+ baseoutbuf = self._backend._ffi.from_buffer(buf, require_writable=True)
|
|
baseinbuf = self._backend._ffi.from_buffer(data)
|
|
|
|
while data_processed != total_data_len:
|
|
diff --git a/tests/hazmat/primitives/test_ciphers.py b/tests/hazmat/primitives/test_ciphers.py
|
|
index ef57790..977f148 100644
|
|
--- a/tests/hazmat/primitives/test_ciphers.py
|
|
+++ b/tests/hazmat/primitives/test_ciphers.py
|
|
@@ -306,6 +306,14 @@ class TestCipherUpdateInto(object):
|
|
with pytest.raises(ValueError):
|
|
encryptor.update_into(b"testing", buf)
|
|
|
|
+ def test_update_into_immutable(self, backend):
|
|
+ key = b"\x00" * 16
|
|
+ c = ciphers.Cipher(AES(key), modes.ECB(), backend)
|
|
+ encryptor = c.encryptor()
|
|
+ buf = b"\x00" * 32
|
|
+ with pytest.raises((TypeError, BufferError)):
|
|
+ encryptor.update_into(b"testing", buf)
|
|
+
|
|
@pytest.mark.supported(
|
|
only_if=lambda backend: backend.cipher_supported(
|
|
AES(b"\x00" * 16), modes.GCM(b"\x00" * 12)
|
|
--
|
|
2.33.0
|
|
|