diff options
Diffstat (limited to 'src/OpenSSL/crypto.py')
-rw-r--r-- | src/OpenSSL/crypto.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/OpenSSL/crypto.py b/src/OpenSSL/crypto.py index 8b12769..f5dd312 100644 --- a/src/OpenSSL/crypto.py +++ b/src/OpenSSL/crypto.py @@ -904,7 +904,14 @@ class X509Extension: """ obj = _lib.X509_EXTENSION_get_object(self._extension) nid = _lib.OBJ_obj2nid(obj) - return _ffi.string(_lib.OBJ_nid2sn(nid)) + # OpenSSL 3.1.0 has a bug where nid2sn returns NULL for NIDs that + # previously returned UNDEF. This is a workaround for that issue. + # https://github.com/openssl/openssl/commit/908ba3ed9adbb3df90f76 + buf = _lib.OBJ_nid2sn(nid) + if buf != _ffi.NULL: + return _ffi.string(buf) + else: + return b"UNDEF" def get_data(self) -> bytes: """ |