# coding: utf-8
# PyGOST -- Pure Python GOST cryptographic functions library
-# Copyright (C) 2015-2016 Sergey Matveev <stargrave@stargrave.org>
+# Copyright (C) 2015-2018 Sergey Matveev <stargrave@stargrave.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
"""
from copy import copy
+from functools import partial
from struct import pack
from pygost.gost28147 import addmod
from pygost.gost28147 import ns2block
from pygost.gost28147 import validate_sbox
from pygost.iface import PEP247
+from pygost.pbkdf2 import pbkdf2 as pbkdf2_base
from pygost.utils import hexdec
from pygost.utils import hexenc
from pygost.utils import strxor
-from pygost.utils import xrange
+from pygost.utils import xrange # pylint: disable=redefined-builtin
DEFAULT_SBOX = "GostR3411_94_TestParamSet"
def digest(self):
""" Get hash of the provided data
"""
- l = 0
+ _len = 0
checksum = 0
h = 32 * b"\x00"
m = self.data
for i in xrange(0, len(m), BLOCKSIZE):
part = m[i:i + BLOCKSIZE][::-1]
- l += len(part) * 8
+ _len += len(part) * 8
checksum = addmod(checksum, int(hexenc(part), 16), 2 ** 256)
if len(part) < BLOCKSIZE:
part = b"\x00" * (BLOCKSIZE - len(part)) + part
h = _step(h, part, self.sbox)
- h = _step(h, 24 * b"\x00" + pack(">Q", l), self.sbox)
+ h = _step(h, 24 * b"\x00" + pack(">Q", _len), self.sbox)
checksum = hex(checksum)[2:].rstrip("L")
if len(checksum) % 2 != 0:
h = _step(h, checksum, self.sbox)
return h[::-1]
- def hexdigest(self):
- return hexenc(self.digest())
-
def new(data=b"", sbox=DEFAULT_SBOX):
return GOST341194(data, sbox)
+
+
+PBKDF2_HASHER = partial(GOST341194, sbox="GostR3411_94_CryptoProParamSet")
+
+
+def pbkdf2(password, salt, iterations, dklen):
+ return pbkdf2_base(PBKDF2_HASHER, password, salt, iterations, dklen)