forked from STI/Astroport.ONE
63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
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# Copyright 2014-2024 Vincent Texier <vit@free.fr>
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#
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# DuniterPy 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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#
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# DuniterPy 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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#
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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 <http://www.gnu.org/licenses/>.
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import base64
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import libnacl.encode
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import libnacl.sign
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from .base58 import Base58Encoder
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class VerifyingKey(libnacl.sign.Verifier):
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"""
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Class to verify documents
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"""
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def __init__(self, pubkey: str) -> None:
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"""
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Creates a Verify class from base58 pubkey
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:param pubkey:
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"""
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key = libnacl.encode.hex_encode(Base58Encoder.decode(pubkey))
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super().__init__(key)
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def get_verified_data(self, data: bytes) -> bytes:
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"""
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Check specified signed data signature and return data without signature
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Raise exception if signature is not valid
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:param data: Data + signature
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:return:
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"""
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return self.verify(data)
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def check_signature(self, data: str, signature: str) -> bool:
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"""
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Check if data signature is valid and from self.pubkey
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:param data: Data to check
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:param signature: Signature to check
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:return:
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"""
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prepended = base64.b64decode(signature) + bytes(data, "ascii")
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try:
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self.verify(prepended)
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except ValueError:
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return False
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return True
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