pkgs/tools/filesystems/ceph/old-python-packages/python-cryptography-Cherry-pick-fix-for-CVE-2023-49083-on-cryptography-40.patch

   1 commit 08dbad8552ecca85d3e38072f94eb864b143d218
   2 Author: Niklas Hambüchen <mail@nh2.me>
   3 Date:   Mon Jan 22 12:52:06 2024 +0000
   4
   5     Cherry-pick fix for CVE-2023-49083
   6
   7     Cherry-Picked-From: f09c261ca10a31fe41b1262306db7f8f1da0e48a
   8     Cherry-Picked-By: Niklas Hambüchen <mail@nh2.me>
   9
  10 diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
  11 index a3fe1bce4..58e7207c4 100644
  12 --- a/src/cryptography/hazmat/backends/openssl/backend.py
  13 +++ b/src/cryptography/hazmat/backends/openssl/backend.py
  14 @@ -2383,9 +2383,12 @@ class Backend:
  15                  _Reasons.UNSUPPORTED_SERIALIZATION,
  16              )
  17
  18 +        certs: list[x509.Certificate] = []
  19 +        if p7.d.sign == self._ffi.NULL:
  20 +            return certs
  21 +
  22          sk_x509 = p7.d.sign.cert
  23          num = self._lib.sk_X509_num(sk_x509)
  24 -        certs = []
  25          for i in range(num):
  26              x509 = self._lib.sk_X509_value(sk_x509, i)
  27              self.openssl_assert(x509 != self._ffi.NULL)
  28 diff --git a/tests/hazmat/primitives/test_pkcs7.py b/tests/hazmat/primitives/test_pkcs7.py
  29 index 4e61c5ef5..d8170bfb9 100644
  30 --- a/tests/hazmat/primitives/test_pkcs7.py
  31 +++ b/tests/hazmat/primitives/test_pkcs7.py
  32 @@ -89,6 +89,12 @@ class TestPKCS7Loading:
  33                  mode="rb",
  34              )
  35
  36 +    def test_load_pkcs7_empty_certificates(self, backend):
  37 +        der = b"\x30\x0B\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x07\x02"
  38 +
  39 +        certificates = pkcs7.load_der_pkcs7_certificates(der)
  40 +        assert certificates == []
  41 +
  42
  43  # We have no public verification API and won't be adding one until we get
  44  # some requirements from users so this function exists to give us basic