| # SPDX-License-Identifier: Apache-2.0 | |
| from cryptography.hazmat.primitives import serialization | |
| class PrivateBytesMixin(): | |
| def _get_private_bytes(self, minimal, format, exclass): | |
| if format is None: | |
| format = self._DEFAULT_FORMAT | |
| if format not in self._VALID_FORMATS: | |
| raise exclass("{} does not support {}".format( | |
| self.shortname(), format)) | |
| return format, self.key.private_bytes( | |
| encoding=serialization.Encoding.DER, | |
| format=self._VALID_FORMATS[format], | |
| encryption_algorithm=serialization.NoEncryption()) |