Update oqs.py

serious bugfix

Author: vsoftco

oqs/oqs.py

@@ -179,9 +179,9 @@ def decap_secret(self, ciphertext):
 
     def free(self):
         """Releases the native resources."""
-        native().OQS_KEM_free(self._kem)
         if hasattr(self, "secret_key"):
             native().OQS_MEM_cleanse(ct.byref(self.secret_key), self._kem.contents.length_secret_key)
+        native().OQS_KEM_free(self._kem)
 
     def __repr__(self):
         return "Key encapsulation mechanism: " + self._kem.contents.method_name.decode()
@@ -330,9 +330,9 @@ def verify(self, message, signature, public_key):
 
     def free(self):
         """Releases the native resources."""
-        native().OQS_SIG_free(self._sig)
         if hasattr(self, "secret_key"):
             native().OQS_MEM_cleanse(ct.byref(self.secret_key), self._sig.contents.length_secret_key)
+        native().OQS_SIG_free(self._sig)
 
     def __repr__(self):
         return "Signature mechanism: " + self._sig.contents.method_name.decode()