"""
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.utils import bytes2long
+from pygost.pbkdf2 import pbkdf2 as pbkdf2_base
from pygost.utils import hexdec
from pygost.utils import hexenc
-from pygost.utils import long2bytes
from pygost.utils import strxor
from pygost.utils import xrange # pylint: disable=redefined-builtin
return GOST341194(data, sbox)
-# This implementation is based on Python 3.5.2 source code's one.
-# PyGOST does not register itself in hashlib anyway, so use it instead.
-def pbkdf2(password, salt, iterations, dklen):
- """PBKDF2 implementation for GOST R 34.11-94
+PBKDF2_HASHER = partial(GOST341194, sbox="GostR3411_94_CryptoProParamSet")
- Based on http://tc26.ru/methods/containers_v1/Addition_to_PKCS5_v1_0.pdf
- """
- inner = GOST341194(sbox="GostR3411_94_CryptoProParamSet")
- outer = GOST341194(sbox="GostR3411_94_CryptoProParamSet")
- password = password + b"\x00" * (inner.block_size - len(password))
- inner.update(strxor(password, len(password) * b"\x36"))
- outer.update(strxor(password, len(password) * b"\x5C"))
-
- def prf(msg):
- icpy = inner.copy()
- ocpy = outer.copy()
- icpy.update(msg)
- ocpy.update(icpy.digest())
- return ocpy.digest()
-
- dkey = b''
- loop = 1
- while len(dkey) < dklen:
- prev = prf(salt + long2bytes(loop, 4))
- rkey = bytes2long(prev)
- for _ in xrange(iterations - 1):
- prev = prf(prev)
- rkey ^= bytes2long(prev)
- loop += 1
- dkey += long2bytes(rkey, inner.digest_size)
- return dkey[:dklen]
+
+def pbkdf2(password, salt, iterations, dklen):
+ return pbkdf2_base(PBKDF2_HASHER, password, salt, iterations, dklen)