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"""
Copyright (c) 2023 Proton AG
This file is part of Proton.
Proton is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Proton is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with ProtonVPN. If not, see <https://www.gnu.org/licenses/>.
"""
# Custom expanded version of SHA512
import hashlib
class PMHash:
digest_size = 256
name = 'PMHash'
def __init__(self, b=b""):
self.b = b
def update(self, b):
self.b += b
def digest(self):
return hashlib.sha512(
self.b + b'\0'
).digest() + hashlib.sha512(
self.b + b'\1'
).digest() + hashlib.sha512(
self.b + b'\2'
).digest() + hashlib.sha512(
self.b + b'\3'
).digest()
def hexdigest(self):
return self.digest().hex()
def copy(self):
return PMHash(self.b)
def pmhash(b=b""):
return PMHash(b)
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