| 3535 | |
| 3536 | def _decode_fields_v2(value: bytes) -> Tuple[int, bytes, bytes, bytes, bytes]: |
| 3537 | def _consume_field(s: bytes) -> Tuple[bytes, bytes]: |
| 3538 | length, _, rest = s.partition(b":") |
| 3539 | n = int(length) |
| 3540 | field_value = rest[:n] |
| 3541 | # In python 3, indexing bytes returns small integers; we must |
| 3542 | # use a slice to get a byte string as in python 2. |
| 3543 | if rest[n : n + 1] != b"|": |
| 3544 | raise ValueError("malformed v2 signed value field") |
| 3545 | rest = rest[n + 1 :] |
| 3546 | return field_value, rest |
| 3547 | |
| 3548 | rest = value[2:] # remove version number |
| 3549 | key_version, rest = _consume_field(rest) |