commit 39ea5314e738ffb6455afe1df2e99f69a2aeb465
author Alex Gaynor <alex.gaynor@gmail.com> Thu Jun 02 09:12:10 2016 -0700
committer Alex Gaynor <alex.gaynor@gmail.com> Thu Jun 02 09:12:10 2016 -0700
tree a82dc2a734602bf3be6a6ec9182feeed5d9025eb
parent 0f11ab36e36073e4cfeb23d476c4e6940671a263

X509 sigalg is now opaque

src/OpenSSL/crypto.py

diff --git a/src/OpenSSL/crypto.py b/src/OpenSSL/crypto.py
index 964420c..d6ebb22 100644
--- a/src/OpenSSL/crypto.py
+++ b/src/OpenSSL/crypto.py
@@ -1081,8 +1081,8 @@
 
         .. versionadded:: 0.13
         """
-        alg = self._x509.cert_info.signature.algorithm
-        nid = _lib.OBJ_obj2nid(alg)
+        algor = _lib.X509_get0_tbs_sigalg(self._x509)
+        nid = _lib.OBJ_obj2nid(algor.algorithm)
         if nid == _lib.NID_undef:
             raise ValueError("Undefined signature algorithm")
         return _ffi.string(_lib.OBJ_nid2ln(nid))