service_account.py 文件源码

def sign_blob(self, blob):
        """Cryptographically sign a blob (of bytes).

        Implements abstract method
        :meth:`oauth2client.client.AssertionCredentials.sign_blob`.

        Args:
            blob: bytes, Message to be signed.

        Returns:
            tuple, A pair of the private key ID used to sign the blob and
            the signed contents.
        """
        return self._private_key_id, self._signer.sign(blob)