From 1f33ff60e938cc2ab10ef3722aa681564f11b290 Mon Sep 17 00:00:00 2001 From: liningjie Date: Sun, 5 Nov 2023 19:40:18 +0800 Subject: [PATCH] raise an exception instead of returning an empty list for pkcs7 cert loading --- ...an-empty-list-for-pkcs7-cert-loading.patch | 70 +++++++++++++++++++ python-cryptography.spec | 7 +- 2 files changed, 76 insertions(+), 1 deletion(-) create mode 100644 backport-raise-an-exception-instead-of-returning-an-empty-list-for-pkcs7-cert-loading.patch diff --git a/backport-raise-an-exception-instead-of-returning-an-empty-list-for-pkcs7-cert-loading.patch b/backport-raise-an-exception-instead-of-returning-an-empty-list-for-pkcs7-cert-loading.patch new file mode 100644 index 0000000..4c34ab6 --- /dev/null +++ b/backport-raise-an-exception-instead-of-returning-an-empty-list-for-pkcs7-cert-loading.patch @@ -0,0 +1,70 @@ +From 6e9dc67ed5d8151d5b7604ad1a97b57cd367e028 Mon Sep 17 00:00:00 2001 +From: Paul Kehrer +Date: Sun, 5 Nov 2023 19:36:55 +0800 +Subject: [PATCH] raise an exception instead of returning an empty list for + pkcs7 cert loading (#9947) + +* raise an exception instead of returning an empty list + +as davidben points out in #9926 we are calling a specific load +certificates function and an empty value doesn't necessarily mean empty +because PKCS7 contains multitudes. erroring is more correct. + +* changelog + +* Update CHANGELOG.rst + +Co-authored-by: Alex Gaynor + +--------- + +Co-authored-by: Alex Gaynor +--- + src/cryptography/hazmat/backends/openssl/backend.py | 7 +++++-- + tests/hazmat/primitives/test_pkcs7.py | 6 +++--- + 2 files changed, 8 insertions(+), 5 deletions(-) + +diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py +index 58e7207..d42220f 100644 +--- a/src/cryptography/hazmat/backends/openssl/backend.py ++++ b/src/cryptography/hazmat/backends/openssl/backend.py +@@ -2383,12 +2383,15 @@ class Backend: + _Reasons.UNSUPPORTED_SERIALIZATION, + ) + +- certs: list[x509.Certificate] = [] + if p7.d.sign == self._ffi.NULL: +- return certs ++ raise ValueError( ++ "The provided PKCS7 has no certificate data, but a cert " ++ "loading method was called." ++ ) + + sk_x509 = p7.d.sign.cert + num = self._lib.sk_X509_num(sk_x509) ++ certs: list[x509.Certificate] = [] + for i in range(num): + x509 = self._lib.sk_X509_value(sk_x509, i) + self.openssl_assert(x509 != self._ffi.NULL) +diff --git a/tests/hazmat/primitives/test_pkcs7.py b/tests/hazmat/primitives/test_pkcs7.py +index d8170bf..44c1d8d 100644 +--- a/tests/hazmat/primitives/test_pkcs7.py ++++ b/tests/hazmat/primitives/test_pkcs7.py +@@ -89,11 +89,11 @@ class TestPKCS7Loading: + mode="rb", + ) + +- def test_load_pkcs7_empty_certificates(self, backend): ++ def test_load_pkcs7_empty_certificates(self): + der = b"\x30\x0B\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x07\x02" + +- certificates = pkcs7.load_der_pkcs7_certificates(der) +- assert certificates == [] ++ with pytest.raises(ValueError): ++ pkcs7.load_der_pkcs7_certificates(der) + + + # We have no public verification API and won't be adding one until we get +-- +2.33.0 + diff --git a/python-cryptography.spec b/python-cryptography.spec index 1807a03..79aca49 100644 --- a/python-cryptography.spec +++ b/python-cryptography.spec @@ -1,7 +1,7 @@ %global pypi_name cryptography Name: python-%{pypi_name} Version: 40.0.2 -Release: 3 +Release: 4 Summary: PyCA's cryptography library License: ASL 2.0 or BSD URL: https://cryptography.io/en/latest/ @@ -10,7 +10,9 @@ Source1: cargo-vendor-cache.tar.gz Patch6002: backport-provide-openssl-apis-related-to-SM-for-python.patch Patch6003: backport-CVE-2023-38325.patch +# CVE-2023-49083 Patch6004: backport-Fixed-crash-when-loading-a-PKCS-7-bundle-with-no-certificates.patch +Patch6005: backport-raise-an-exception-instead-of-returning-an-empty-list-for-pkcs7-cert-loading.patch BuildRequires: openssl-devel cargo BuildRequires: gcc @@ -87,6 +89,9 @@ EOF %doc README.rst docs %changelog +* Sat Dec 2 2023 liningjie - 40.0.2-4 +- raise an exception instead of returning an empty list for pkcs7 cert loading + * Wed Nov 29 2023 liningjie - 40.0.2-3 - Fixed crash when loading a PKCS#7 bundle with no certificates -- Gitee