Import libs 4 (#758)

1 files changed, 15 insertions, 0 deletions

diff --git a/contrib/python/google-auth/py3/google/auth/crypt/es256.py b/contrib/python/google-auth/py3/google/auth/crypt/es256.py
index 7920cc7ffb..820e4becce 100644
--- a/contrib/python/google-auth/py3/google/auth/crypt/es256.py
+++ b/contrib/python/google-auth/py3/google/auth/crypt/es256.py
@@ -158,3 +158,18 @@ class ES256Signer(base.Signer, base.FromServiceAccountMixin):
             key, password=None, backend=_BACKEND
         )
         return cls(private_key, key_id=key_id)
+
+    def __getstate__(self):
+        """Pickle helper that serializes the _key attribute."""
+        state = self.__dict__.copy()
+        state["_key"] = self._key.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.PKCS8,
+            encryption_algorithm=serialization.NoEncryption(),
+        )
+        return state
+
+    def __setstate__(self, state):
+        """Pickle helper that deserializes the _key attribute."""
+        state["_key"] = serialization.load_pem_private_key(state["_key"], None)
+        self.__dict__.update(state)