mirror of
https://github.com/theupdateframework/python-tuf
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58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
# Copyright New York University and the TUF contributors
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# SPDX-License-Identifier: MIT OR Apache-2.0
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"""``tuf.api.serialization`` module provides abstract base classes and concrete
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implementations to serialize and deserialize TUF metadata.
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Any custom de/serialization implementations should inherit from the abstract
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base classes defined in this module. The implementations can use the
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``to_dict()``/``from_dict()`` implementations available in the Metadata
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API objects.
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- Metadata de/serializers are used to convert to and from wireline formats.
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- Signed serializers are used to canonicalize data for cryptographic signatures
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generation and verification.
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"""
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import abc
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from typing import TYPE_CHECKING
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from tuf.api.exceptions import RepositoryError
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if TYPE_CHECKING:
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from tuf.api.metadata import Metadata, Signed
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class SerializationError(RepositoryError):
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"""Error during serialization."""
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class DeserializationError(RepositoryError):
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"""Error during deserialization."""
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class MetadataDeserializer(metaclass=abc.ABCMeta):
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"""Abstract base class for deserialization of Metadata objects."""
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@abc.abstractmethod
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def deserialize(self, raw_data: bytes) -> "Metadata":
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"""Deserialize bytes to Metadata object."""
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raise NotImplementedError
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class MetadataSerializer(metaclass=abc.ABCMeta):
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"""Abstract base class for serialization of Metadata objects."""
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@abc.abstractmethod
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def serialize(self, metadata_obj: "Metadata") -> bytes:
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"""Serialize Metadata object to bytes."""
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raise NotImplementedError
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class SignedSerializer(metaclass=abc.ABCMeta):
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"""Abstract base class for serialization of Signed objects."""
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@abc.abstractmethod
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def serialize(self, signed_obj: "Signed") -> bytes:
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"""Serialize Signed object to bytes."""
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raise NotImplementedError
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