52 lines
1.9 KiB
Python
52 lines
1.9 KiB
Python
"""Included generators to generate and validate Kasten objects"""
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from hashlib import sha3_384
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from mimcvdf import vdf_create, vdf_verify
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from kasten.types import KastenPacked
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from kasten.types import KastenChecksum
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from kasten.exceptions import InvalidID
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from ..main import Kasten
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"""
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Copyright (C) <2020> Kevin Froman
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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class KastenBaseGenerator:
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"""Generators are used by Kasten to generate and verify Kasten object checksums and do any desired preperation on the data."""
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@classmethod
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def generate(cls, packed_bytes: KastenPacked) -> Kasten:
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return Kasten(sha3_384(packed_bytes).digest(), packed_bytes, cls,
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auto_check_generator=False)
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@staticmethod
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def validate_id(hash: KastenChecksum, packed_bytes: KastenPacked) -> None:
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if not sha3_384(packed_bytes).digest() == hash:
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raise InvalidID
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return None
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class KastenMimcGenerator:
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@classmethod
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def generate(cls, packed_bytes: KastenPacked, rounds: int = 5000) -> Kasten:
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return Kasten(vdf_create(packed_bytes, rounds, dec=True).to_bytes(64, "big"), packed_bytes, cls, auto_check_generator=False)
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@staticmethod
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def validate_id(hash: KastenChecksum, packed_bytes: KastenPacked, rounds = 5000) -> None:
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if not vdf_verify(packed_bytes, hash, rounds):
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raise InvalidID
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return None
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