""" History ======= These routines (which have since been drastically modified for python) are based on a Java implementation of the des-crypt algorithm, found at ``_. The copyright & license for that source is as follows:: UnixCrypt.java 0.9 96/11/25 Copyright (c) 1996 Aki Yoshida. All rights reserved. Permission to use, copy, modify and distribute this software for non-commercial or commercial purposes and without fee is hereby granted provided that this copyright notice appears in all copies. --- Unix crypt(3C) utility @version 0.9, 11/25/96 @author Aki Yoshida --- modified April 2001 by Iris Van den Broeke, Daniel Deville --- Unix Crypt. Implements the one way cryptography used by Unix systems for simple password protection. @version $Id: UnixCrypt2.txt,v 1.1.1.1 2005/09/13 22:20:13 christos Exp $ @author Greg Wilkins (gregw) netbsd des-crypt implementation, which has some nice notes on how this all works - http://fxr.googlebit.com/source/lib/libcrypt/crypt.c?v=NETBSD-CURRENT """ #TODO: could use an accelerated C version of this module to speed up lmhash, des-crypt, and ext-des-crypt #========================================================= #imports #========================================================= #pkg from passlib.utils import bytes_to_int, int_to_bytes, bytes, bord, bjoin_ints #local __all__ = [ "expand_des_key", "des_encrypt_block", "mdes_encrypt_int_block", ] #========================================================= #precalculated iteration ranges & constants #========================================================= R8 = range(8) RR8 = range(7, -1, -1) RR4 = range(3, -1, -1) RR12_1 = range(11, 1, -1) RR9_1 = range(9,-1,-1) RR6_S2 = range(6, -1, -2) RR14_S2 = range(14, -1, -2) R16_S2 = range(0, 16, 2) INT_24_MAX = 0xffffff INT_64_MAX = 0xffffffff INT_64_MAX = 0xffffffffffffffff #========================================================= # static tables for des #========================================================= PCXROT = IE3264 = SPE = CF6464 = None #placeholders filled in by load_tables def load_tables(): "delay loading tables until they are actually needed" global PCXROT, IE3264, SPE, CF6464 #--------------------------------------------------- # Initial key schedule permutation # PC1ROT - bit reverse, then PC1, then Rotate, then PC2 #--------------------------------------------------- #NOTE: this was reordered from original table to make perm3264 logic simpler PC1ROT=( ( 0x0000000000000000, 0x0000000000000000, 0x0000000000002000, 0x0000000000002000, 0x0000000000000020, 0x0000000000000020, 0x0000000000002020, 0x0000000000002020, 0x0000000000000400, 0x0000000000000400, 0x0000000000002400, 0x0000000000002400, 0x0000000000000420, 0x0000000000000420, 0x0000000000002420, 0x0000000000002420, ), ( 0x0000000000000000, 0x2000000000000000, 0x0000000400000000, 0x2000000400000000, 0x0000800000000000, 0x2000800000000000, 0x0000800400000000, 0x2000800400000000, 0x0008000000000000, 0x2008000000000000, 0x0008000400000000, 0x2008000400000000, 0x0008800000000000, 0x2008800000000000, 0x0008800400000000, 0x2008800400000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000040, 0x0000000000000040, 0x0000000020000000, 0x0000000020000000, 0x0000000020000040, 0x0000000020000040, 0x0000000000200000, 0x0000000000200000, 0x0000000000200040, 0x0000000000200040, 0x0000000020200000, 0x0000000020200000, 0x0000000020200040, 0x0000000020200040, ), ( 0x0000000000000000, 0x0002000000000000, 0x0800000000000000, 0x0802000000000000, 0x0100000000000000, 0x0102000000000000, 0x0900000000000000, 0x0902000000000000, 0x4000000000000000, 0x4002000000000000, 0x4800000000000000, 0x4802000000000000, 0x4100000000000000, 0x4102000000000000, 0x4900000000000000, 0x4902000000000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000040000, 0x0000000000040000, 0x0000020000000000, 0x0000020000000000, 0x0000020000040000, 0x0000020000040000, 0x0000000000000004, 0x0000000000000004, 0x0000000000040004, 0x0000000000040004, 0x0000020000000004, 0x0000020000000004, 0x0000020000040004, 0x0000020000040004, ), ( 0x0000000000000000, 0x0000400000000000, 0x0200000000000000, 0x0200400000000000, 0x0080000000000000, 0x0080400000000000, 0x0280000000000000, 0x0280400000000000, 0x0000008000000000, 0x0000408000000000, 0x0200008000000000, 0x0200408000000000, 0x0080008000000000, 0x0080408000000000, 0x0280008000000000, 0x0280408000000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000010000000, 0x0000000010000000, 0x0000000000001000, 0x0000000000001000, 0x0000000010001000, 0x0000000010001000, 0x0000000040000000, 0x0000000040000000, 0x0000000050000000, 0x0000000050000000, 0x0000000040001000, 0x0000000040001000, 0x0000000050001000, 0x0000000050001000, ), ( 0x0000000000000000, 0x0000001000000000, 0x0000080000000000, 0x0000081000000000, 0x1000000000000000, 0x1000001000000000, 0x1000080000000000, 0x1000081000000000, 0x0004000000000000, 0x0004001000000000, 0x0004080000000000, 0x0004081000000000, 0x1004000000000000, 0x1004001000000000, 0x1004080000000000, 0x1004081000000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000080, 0x0000000000000080, 0x0000000000080000, 0x0000000000080000, 0x0000000000080080, 0x0000000000080080, 0x0000000000800000, 0x0000000000800000, 0x0000000000800080, 0x0000000000800080, 0x0000000000880000, 0x0000000000880000, 0x0000000000880080, 0x0000000000880080, ), ( 0x0000000000000000, 0x0000000008000000, 0x0000002000000000, 0x0000002008000000, 0x0000100000000000, 0x0000100008000000, 0x0000102000000000, 0x0000102008000000, 0x0000200000000000, 0x0000200008000000, 0x0000202000000000, 0x0000202008000000, 0x0000300000000000, 0x0000300008000000, 0x0000302000000000, 0x0000302008000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000400000, 0x0000000000400000, 0x0000000004000000, 0x0000000004000000, 0x0000000004400000, 0x0000000004400000, 0x0000000000000800, 0x0000000000000800, 0x0000000000400800, 0x0000000000400800, 0x0000000004000800, 0x0000000004000800, 0x0000000004400800, 0x0000000004400800, ), ( 0x0000000000000000, 0x0000000000008000, 0x0040000000000000, 0x0040000000008000, 0x0000004000000000, 0x0000004000008000, 0x0040004000000000, 0x0040004000008000, 0x8000000000000000, 0x8000000000008000, 0x8040000000000000, 0x8040000000008000, 0x8000004000000000, 0x8000004000008000, 0x8040004000000000, 0x8040004000008000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000004000, 0x0000000000004000, 0x0000000000000008, 0x0000000000000008, 0x0000000000004008, 0x0000000000004008, 0x0000000000000010, 0x0000000000000010, 0x0000000000004010, 0x0000000000004010, 0x0000000000000018, 0x0000000000000018, 0x0000000000004018, 0x0000000000004018, ), ( 0x0000000000000000, 0x0000000200000000, 0x0001000000000000, 0x0001000200000000, 0x0400000000000000, 0x0400000200000000, 0x0401000000000000, 0x0401000200000000, 0x0020000000000000, 0x0020000200000000, 0x0021000000000000, 0x0021000200000000, 0x0420000000000000, 0x0420000200000000, 0x0421000000000000, 0x0421000200000000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000010000000000, 0x0000010000000000, 0x0000000100000000, 0x0000000100000000, 0x0000010100000000, 0x0000010100000000, 0x0000000000100000, 0x0000000000100000, 0x0000010000100000, 0x0000010000100000, 0x0000000100100000, 0x0000000100100000, 0x0000010100100000, 0x0000010100100000, ), ( 0x0000000000000000, 0x0000000080000000, 0x0000040000000000, 0x0000040080000000, 0x0010000000000000, 0x0010000080000000, 0x0010040000000000, 0x0010040080000000, 0x0000000800000000, 0x0000000880000000, 0x0000040800000000, 0x0000040880000000, 0x0010000800000000, 0x0010000880000000, 0x0010040800000000, 0x0010040880000000, ), ) #--------------------------------------------------- # Subsequent key schedule rotation permutations # PC2ROT - PC2 inverse, then Rotate, then PC2 #--------------------------------------------------- #NOTE: this was reordered from original table to make perm3264 logic simpler PC2ROTA=( ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000200000, 0x0000000000200000, 0x0000000000200000, 0x0000000000200000, 0x0000000004000000, 0x0000000004000000, 0x0000000004000000, 0x0000000004000000, 0x0000000004200000, 0x0000000004200000, 0x0000000004200000, 0x0000000004200000, ), ( 0x0000000000000000, 0x0000000000000800, 0x0000010000000000, 0x0000010000000800, 0x0000000000002000, 0x0000000000002800, 0x0000010000002000, 0x0000010000002800, 0x0000000010000000, 0x0000000010000800, 0x0000010010000000, 0x0000010010000800, 0x0000000010002000, 0x0000000010002800, 0x0000010010002000, 0x0000010010002800, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000100000000, 0x0000000100000000, 0x0000000100000000, 0x0000000100000000, 0x0000000000800000, 0x0000000000800000, 0x0000000000800000, 0x0000000000800000, 0x0000000100800000, 0x0000000100800000, 0x0000000100800000, 0x0000000100800000, ), ( 0x0000000000000000, 0x0000020000000000, 0x0000000080000000, 0x0000020080000000, 0x0000000000400000, 0x0000020000400000, 0x0000000080400000, 0x0000020080400000, 0x0000000008000000, 0x0000020008000000, 0x0000000088000000, 0x0000020088000000, 0x0000000008400000, 0x0000020008400000, 0x0000000088400000, 0x0000020088400000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000040, 0x0000000000000040, 0x0000000000000040, 0x0000000000000040, 0x0000000000001000, 0x0000000000001000, 0x0000000000001000, 0x0000000000001000, 0x0000000000001040, 0x0000000000001040, 0x0000000000001040, 0x0000000000001040, ), ( 0x0000000000000000, 0x0000000000000010, 0x0000000000000400, 0x0000000000000410, 0x0000000000000080, 0x0000000000000090, 0x0000000000000480, 0x0000000000000490, 0x0000000040000000, 0x0000000040000010, 0x0000000040000400, 0x0000000040000410, 0x0000000040000080, 0x0000000040000090, 0x0000000040000480, 0x0000000040000490, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000080000, 0x0000000000080000, 0x0000000000080000, 0x0000000000080000, 0x0000000000100000, 0x0000000000100000, 0x0000000000100000, 0x0000000000100000, 0x0000000000180000, 0x0000000000180000, 0x0000000000180000, 0x0000000000180000, ), ( 0x0000000000000000, 0x0000000000040000, 0x0000000000000020, 0x0000000000040020, 0x0000000000000004, 0x0000000000040004, 0x0000000000000024, 0x0000000000040024, 0x0000000200000000, 0x0000000200040000, 0x0000000200000020, 0x0000000200040020, 0x0000000200000004, 0x0000000200040004, 0x0000000200000024, 0x0000000200040024, ), ( 0x0000000000000000, 0x0000000000000008, 0x0000000000008000, 0x0000000000008008, 0x0010000000000000, 0x0010000000000008, 0x0010000000008000, 0x0010000000008008, 0x0020000000000000, 0x0020000000000008, 0x0020000000008000, 0x0020000000008008, 0x0030000000000000, 0x0030000000000008, 0x0030000000008000, 0x0030000000008008, ), ( 0x0000000000000000, 0x0000400000000000, 0x0000080000000000, 0x0000480000000000, 0x0000100000000000, 0x0000500000000000, 0x0000180000000000, 0x0000580000000000, 0x4000000000000000, 0x4000400000000000, 0x4000080000000000, 0x4000480000000000, 0x4000100000000000, 0x4000500000000000, 0x4000180000000000, 0x4000580000000000, ), ( 0x0000000000000000, 0x0000000000004000, 0x0000000020000000, 0x0000000020004000, 0x0001000000000000, 0x0001000000004000, 0x0001000020000000, 0x0001000020004000, 0x0200000000000000, 0x0200000000004000, 0x0200000020000000, 0x0200000020004000, 0x0201000000000000, 0x0201000000004000, 0x0201000020000000, 0x0201000020004000, ), ( 0x0000000000000000, 0x1000000000000000, 0x0004000000000000, 0x1004000000000000, 0x0002000000000000, 0x1002000000000000, 0x0006000000000000, 0x1006000000000000, 0x0000000800000000, 0x1000000800000000, 0x0004000800000000, 0x1004000800000000, 0x0002000800000000, 0x1002000800000000, 0x0006000800000000, 0x1006000800000000, ), ( 0x0000000000000000, 0x0040000000000000, 0x2000000000000000, 0x2040000000000000, 0x0000008000000000, 0x0040008000000000, 0x2000008000000000, 0x2040008000000000, 0x0000001000000000, 0x0040001000000000, 0x2000001000000000, 0x2040001000000000, 0x0000009000000000, 0x0040009000000000, 0x2000009000000000, 0x2040009000000000, ), ( 0x0000000000000000, 0x0400000000000000, 0x8000000000000000, 0x8400000000000000, 0x0000002000000000, 0x0400002000000000, 0x8000002000000000, 0x8400002000000000, 0x0100000000000000, 0x0500000000000000, 0x8100000000000000, 0x8500000000000000, 0x0100002000000000, 0x0500002000000000, 0x8100002000000000, 0x8500002000000000, ), ( 0x0000000000000000, 0x0000800000000000, 0x0800000000000000, 0x0800800000000000, 0x0000004000000000, 0x0000804000000000, 0x0800004000000000, 0x0800804000000000, 0x0000000400000000, 0x0000800400000000, 0x0800000400000000, 0x0800800400000000, 0x0000004400000000, 0x0000804400000000, 0x0800004400000000, 0x0800804400000000, ), ( 0x0000000000000000, 0x0080000000000000, 0x0000040000000000, 0x0080040000000000, 0x0008000000000000, 0x0088000000000000, 0x0008040000000000, 0x0088040000000000, 0x0000200000000000, 0x0080200000000000, 0x0000240000000000, 0x0080240000000000, 0x0008200000000000, 0x0088200000000000, 0x0008240000000000, 0x0088240000000000, ), ) #NOTE: this was reordered from original table to make perm3264 logic simpler PC2ROTB=( ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000400, 0x0000000000000400, 0x0000000000000400, 0x0000000000000400, 0x0000000000080000, 0x0000000000080000, 0x0000000000080000, 0x0000000000080000, 0x0000000000080400, 0x0000000000080400, 0x0000000000080400, 0x0000000000080400, ), ( 0x0000000000000000, 0x0000000000800000, 0x0000000000004000, 0x0000000000804000, 0x0000000080000000, 0x0000000080800000, 0x0000000080004000, 0x0000000080804000, 0x0000000000040000, 0x0000000000840000, 0x0000000000044000, 0x0000000000844000, 0x0000000080040000, 0x0000000080840000, 0x0000000080044000, 0x0000000080844000, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000008, 0x0000000000000008, 0x0000000000000008, 0x0000000000000008, 0x0000000040000000, 0x0000000040000000, 0x0000000040000000, 0x0000000040000000, 0x0000000040000008, 0x0000000040000008, 0x0000000040000008, 0x0000000040000008, ), ( 0x0000000000000000, 0x0000000020000000, 0x0000000200000000, 0x0000000220000000, 0x0000000000000080, 0x0000000020000080, 0x0000000200000080, 0x0000000220000080, 0x0000000000100000, 0x0000000020100000, 0x0000000200100000, 0x0000000220100000, 0x0000000000100080, 0x0000000020100080, 0x0000000200100080, 0x0000000220100080, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000002000, 0x0000000000002000, 0x0000000000002000, 0x0000000000002000, 0x0000020000000000, 0x0000020000000000, 0x0000020000000000, 0x0000020000000000, 0x0000020000002000, 0x0000020000002000, 0x0000020000002000, 0x0000020000002000, ), ( 0x0000000000000000, 0x0000000000000800, 0x0000000100000000, 0x0000000100000800, 0x0000000010000000, 0x0000000010000800, 0x0000000110000000, 0x0000000110000800, 0x0000000000000004, 0x0000000000000804, 0x0000000100000004, 0x0000000100000804, 0x0000000010000004, 0x0000000010000804, 0x0000000110000004, 0x0000000110000804, ), ( 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000001000, 0x0000000000001000, 0x0000000000001000, 0x0000000000001000, 0x0000000000000010, 0x0000000000000010, 0x0000000000000010, 0x0000000000000010, 0x0000000000001010, 0x0000000000001010, 0x0000000000001010, 0x0000000000001010, ), ( 0x0000000000000000, 0x0000000000000040, 0x0000010000000000, 0x0000010000000040, 0x0000000000200000, 0x0000000000200040, 0x0000010000200000, 0x0000010000200040, 0x0000000000008000, 0x0000000000008040, 0x0000010000008000, 0x0000010000008040, 0x0000000000208000, 0x0000000000208040, 0x0000010000208000, 0x0000010000208040, ), ( 0x0000000000000000, 0x0000000004000000, 0x0000000008000000, 0x000000000c000000, 0x0400000000000000, 0x0400000004000000, 0x0400000008000000, 0x040000000c000000, 0x8000000000000000, 0x8000000004000000, 0x8000000008000000, 0x800000000c000000, 0x8400000000000000, 0x8400000004000000, 0x8400000008000000, 0x840000000c000000, ), ( 0x0000000000000000, 0x0002000000000000, 0x0200000000000000, 0x0202000000000000, 0x1000000000000000, 0x1002000000000000, 0x1200000000000000, 0x1202000000000000, 0x0008000000000000, 0x000a000000000000, 0x0208000000000000, 0x020a000000000000, 0x1008000000000000, 0x100a000000000000, 0x1208000000000000, 0x120a000000000000, ), ( 0x0000000000000000, 0x0000000000400000, 0x0000000000000020, 0x0000000000400020, 0x0040000000000000, 0x0040000000400000, 0x0040000000000020, 0x0040000000400020, 0x0800000000000000, 0x0800000000400000, 0x0800000000000020, 0x0800000000400020, 0x0840000000000000, 0x0840000000400000, 0x0840000000000020, 0x0840000000400020, ), ( 0x0000000000000000, 0x0080000000000000, 0x0000008000000000, 0x0080008000000000, 0x2000000000000000, 0x2080000000000000, 0x2000008000000000, 0x2080008000000000, 0x0020000000000000, 0x00a0000000000000, 0x0020008000000000, 0x00a0008000000000, 0x2020000000000000, 0x20a0000000000000, 0x2020008000000000, 0x20a0008000000000, ), ( 0x0000000000000000, 0x0000002000000000, 0x0000040000000000, 0x0000042000000000, 0x4000000000000000, 0x4000002000000000, 0x4000040000000000, 0x4000042000000000, 0x0000400000000000, 0x0000402000000000, 0x0000440000000000, 0x0000442000000000, 0x4000400000000000, 0x4000402000000000, 0x4000440000000000, 0x4000442000000000, ), ( 0x0000000000000000, 0x0000004000000000, 0x0000200000000000, 0x0000204000000000, 0x0000080000000000, 0x0000084000000000, 0x0000280000000000, 0x0000284000000000, 0x0000800000000000, 0x0000804000000000, 0x0000a00000000000, 0x0000a04000000000, 0x0000880000000000, 0x0000884000000000, 0x0000a80000000000, 0x0000a84000000000, ), ( 0x0000000000000000, 0x0000000800000000, 0x0000000400000000, 0x0000000c00000000, 0x0000100000000000, 0x0000100800000000, 0x0000100400000000, 0x0000100c00000000, 0x0010000000000000, 0x0010000800000000, 0x0010000400000000, 0x0010000c00000000, 0x0010100000000000, 0x0010100800000000, 0x0010100400000000, 0x0010100c00000000, ), ( 0x0000000000000000, 0x0100000000000000, 0x0001000000000000, 0x0101000000000000, 0x0000001000000000, 0x0100001000000000, 0x0001001000000000, 0x0101001000000000, 0x0004000000000000, 0x0104000000000000, 0x0005000000000000, 0x0105000000000000, 0x0004001000000000, 0x0104001000000000, 0x0005001000000000, 0x0105001000000000, ), ) #--------------------------------------------------- #PCXROT - PC1ROT, PC2ROTA, PC2ROTB listed in order # of the PC1 rotation schedule, as used by des_setkey #--------------------------------------------------- ##ROTATES = (1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1) ##PCXROT = ( ## PC1ROT, PC2ROTA, PC2ROTB, PC2ROTB, ## PC2ROTB, PC2ROTB, PC2ROTB, PC2ROTB, ## PC2ROTA, PC2ROTB, PC2ROTB, PC2ROTB, ## PC2ROTB, PC2ROTB, PC2ROTB, PC2ROTA, ## ) #NOTE: modified PCXROT to contain entrys broken into pairs, # to help generate them in format best used by encoder. PCXROT = ( (PC1ROT, PC2ROTA), (PC2ROTB, PC2ROTB), (PC2ROTB, PC2ROTB), (PC2ROTB, PC2ROTB), (PC2ROTA, PC2ROTB), (PC2ROTB, PC2ROTB), (PC2ROTB, PC2ROTB), (PC2ROTB, PC2ROTA), ) #--------------------------------------------------- # Bit reverse, intial permupation, expantion # Initial permutation/expansion table #--------------------------------------------------- #NOTE: this was reordered from original table to make perm3264 logic simpler IE3264=( ( 0x0000000000000000, 0x0000000000800800, 0x0000000000008008, 0x0000000000808808, 0x0000008008000000, 0x0000008008800800, 0x0000008008008008, 0x0000008008808808, 0x0000000080080000, 0x0000000080880800, 0x0000000080088008, 0x0000000080888808, 0x0000008088080000, 0x0000008088880800, 0x0000008088088008, 0x0000008088888808, ), ( 0x0000000000000000, 0x0080080000000000, 0x0000800800000000, 0x0080880800000000, 0x0800000000000080, 0x0880080000000080, 0x0800800800000080, 0x0880880800000080, 0x8008000000000000, 0x8088080000000000, 0x8008800800000000, 0x8088880800000000, 0x8808000000000080, 0x8888080000000080, 0x8808800800000080, 0x8888880800000080, ), ( 0x0000000000000000, 0x0000000000001000, 0x0000000000000010, 0x0000000000001010, 0x0000000010000000, 0x0000000010001000, 0x0000000010000010, 0x0000000010001010, 0x0000000000100000, 0x0000000000101000, 0x0000000000100010, 0x0000000000101010, 0x0000000010100000, 0x0000000010101000, 0x0000000010100010, 0x0000000010101010, ), ( 0x0000000000000000, 0x0000100000000000, 0x0000001000000000, 0x0000101000000000, 0x1000000000000000, 0x1000100000000000, 0x1000001000000000, 0x1000101000000000, 0x0010000000000000, 0x0010100000000000, 0x0010001000000000, 0x0010101000000000, 0x1010000000000000, 0x1010100000000000, 0x1010001000000000, 0x1010101000000000, ), ( 0x0000000000000000, 0x0000000000002000, 0x0000000000000020, 0x0000000000002020, 0x0000000020000000, 0x0000000020002000, 0x0000000020000020, 0x0000000020002020, 0x0000000000200000, 0x0000000000202000, 0x0000000000200020, 0x0000000000202020, 0x0000000020200000, 0x0000000020202000, 0x0000000020200020, 0x0000000020202020, ), ( 0x0000000000000000, 0x0000200000000000, 0x0000002000000000, 0x0000202000000000, 0x2000000000000000, 0x2000200000000000, 0x2000002000000000, 0x2000202000000000, 0x0020000000000000, 0x0020200000000000, 0x0020002000000000, 0x0020202000000000, 0x2020000000000000, 0x2020200000000000, 0x2020002000000000, 0x2020202000000000, ), ( 0x0000000000000000, 0x0000000000004004, 0x0400000000000040, 0x0400000000004044, 0x0000000040040000, 0x0000000040044004, 0x0400000040040040, 0x0400000040044044, 0x0000000000400400, 0x0000000000404404, 0x0400000000400440, 0x0400000000404444, 0x0000000040440400, 0x0000000040444404, 0x0400000040440440, 0x0400000040444444, ), ( 0x0000000000000000, 0x0000400400000000, 0x0000004004000000, 0x0000404404000000, 0x4004000000000000, 0x4004400400000000, 0x4004004004000000, 0x4004404404000000, 0x0040040000000000, 0x0040440400000000, 0x0040044004000000, 0x0040444404000000, 0x4044040000000000, 0x4044440400000000, 0x4044044004000000, 0x4044444404000000, ), ) #--------------------------------------------------- # Table that combines the S, P, and E operations. #--------------------------------------------------- SPE=( ( 0x0080088008200000, 0x0000008008000000, 0x0000000000200020, 0x0080088008200020, 0x0000000000200000, 0x0080088008000020, 0x0000008008000020, 0x0000000000200020, 0x0080088008000020, 0x0080088008200000, 0x0000008008200000, 0x0080080000000020, 0x0080080000200020, 0x0000000000200000, 0x0000000000000000, 0x0000008008000020, 0x0000008008000000, 0x0000000000000020, 0x0080080000200000, 0x0080088008000000, 0x0080088008200020, 0x0000008008200000, 0x0080080000000020, 0x0080080000200000, 0x0000000000000020, 0x0080080000000000, 0x0080088008000000, 0x0000008008200020, 0x0080080000000000, 0x0080080000200020, 0x0000008008200020, 0x0000000000000000, 0x0000000000000000, 0x0080088008200020, 0x0080080000200000, 0x0000008008000020, 0x0080088008200000, 0x0000008008000000, 0x0080080000000020, 0x0080080000200000, 0x0000008008200020, 0x0080080000000000, 0x0080088008000000, 0x0000000000200020, 0x0080088008000020, 0x0000000000000020, 0x0000000000200020, 0x0000008008200000, 0x0080088008200020, 0x0080088008000000, 0x0000008008200000, 0x0080080000200020, 0x0000000000200000, 0x0080080000000020, 0x0000008008000020, 0x0000000000000000, 0x0000008008000000, 0x0000000000200000, 0x0080080000200020, 0x0080088008200000, 0x0000000000000020, 0x0000008008200020, 0x0080080000000000, 0x0080088008000020, ), ( 0x1000800810004004, 0x0000000000000000, 0x0000800810000000, 0x0000000010004004, 0x1000000000004004, 0x1000800800000000, 0x0000800800004004, 0x0000800810000000, 0x0000800800000000, 0x1000000010004004, 0x1000000000000000, 0x0000800800004004, 0x1000000010000000, 0x0000800810004004, 0x0000000010004004, 0x1000000000000000, 0x0000000010000000, 0x1000800800004004, 0x1000000010004004, 0x0000800800000000, 0x1000800810000000, 0x0000000000004004, 0x0000000000000000, 0x1000000010000000, 0x1000800800004004, 0x1000800810000000, 0x0000800810004004, 0x1000000000004004, 0x0000000000004004, 0x0000000010000000, 0x1000800800000000, 0x1000800810004004, 0x1000000010000000, 0x0000800810004004, 0x0000800800004004, 0x1000800810000000, 0x1000800810004004, 0x1000000010000000, 0x1000000000004004, 0x0000000000000000, 0x0000000000004004, 0x1000800800000000, 0x0000000010000000, 0x1000000010004004, 0x0000800800000000, 0x0000000000004004, 0x1000800810000000, 0x1000800800004004, 0x0000800810004004, 0x0000800800000000, 0x0000000000000000, 0x1000000000004004, 0x1000000000000000, 0x1000800810004004, 0x0000800810000000, 0x0000000010004004, 0x1000000010004004, 0x0000000010000000, 0x1000800800000000, 0x0000800800004004, 0x1000800800004004, 0x1000000000000000, 0x0000000010004004, 0x0000800810000000, ), ( 0x0000000000400410, 0x0010004004400400, 0x0010000000000000, 0x0010000000400410, 0x0000004004000010, 0x0000000000400400, 0x0010000000400410, 0x0010004004000000, 0x0010000000400400, 0x0000004004000000, 0x0000004004400400, 0x0000000000000010, 0x0010004004400410, 0x0010000000000010, 0x0000000000000010, 0x0000004004400410, 0x0000000000000000, 0x0000004004000010, 0x0010004004400400, 0x0010000000000000, 0x0010000000000010, 0x0010004004400410, 0x0000004004000000, 0x0000000000400410, 0x0000004004400410, 0x0010000000400400, 0x0010004004000010, 0x0000004004400400, 0x0010004004000000, 0x0000000000000000, 0x0000000000400400, 0x0010004004000010, 0x0010004004400400, 0x0010000000000000, 0x0000000000000010, 0x0000004004000000, 0x0010000000000010, 0x0000004004000010, 0x0000004004400400, 0x0010000000400410, 0x0000000000000000, 0x0010004004400400, 0x0010004004000000, 0x0000004004400410, 0x0000004004000010, 0x0000000000400400, 0x0010004004400410, 0x0000000000000010, 0x0010004004000010, 0x0000000000400410, 0x0000000000400400, 0x0010004004400410, 0x0000004004000000, 0x0010000000400400, 0x0010000000400410, 0x0010004004000000, 0x0010000000400400, 0x0000000000000000, 0x0000004004400410, 0x0010000000000010, 0x0000000000400410, 0x0010004004000010, 0x0010000000000000, 0x0000004004400400, ), ( 0x0800100040040080, 0x0000100000001000, 0x0800000000000080, 0x0800100040041080, 0x0000000000000000, 0x0000000040041000, 0x0800100000001080, 0x0800000040040080, 0x0000100040041000, 0x0800000000001080, 0x0000000000001000, 0x0800100000000080, 0x0800000000001080, 0x0800100040040080, 0x0000000040040000, 0x0000000000001000, 0x0800000040041080, 0x0000100040040000, 0x0000100000000000, 0x0800000000000080, 0x0000100040040000, 0x0800100000001080, 0x0000000040041000, 0x0000100000000000, 0x0800100000000080, 0x0000000000000000, 0x0800000040040080, 0x0000100040041000, 0x0000100000001000, 0x0800000040041080, 0x0800100040041080, 0x0000000040040000, 0x0800000040041080, 0x0800100000000080, 0x0000000040040000, 0x0800000000001080, 0x0000100040040000, 0x0000100000001000, 0x0800000000000080, 0x0000000040041000, 0x0800100000001080, 0x0000000000000000, 0x0000100000000000, 0x0800000040040080, 0x0000000000000000, 0x0800000040041080, 0x0000100040041000, 0x0000100000000000, 0x0000000000001000, 0x0800100040041080, 0x0800100040040080, 0x0000000040040000, 0x0800100040041080, 0x0800000000000080, 0x0000100000001000, 0x0800100040040080, 0x0800000040040080, 0x0000100040040000, 0x0000000040041000, 0x0800100000001080, 0x0800100000000080, 0x0000000000001000, 0x0800000000001080, 0x0000100040041000, ), ( 0x0000000000800800, 0x0000001000000000, 0x0040040000000000, 0x2040041000800800, 0x2000001000800800, 0x0040040000800800, 0x2040041000000000, 0x0000001000800800, 0x0000001000000000, 0x2000000000000000, 0x2000000000800800, 0x0040041000000000, 0x2040040000800800, 0x2000001000800800, 0x0040041000800800, 0x0000000000000000, 0x0040041000000000, 0x0000000000800800, 0x2000001000000000, 0x2040040000000000, 0x0040040000800800, 0x2040041000000000, 0x0000000000000000, 0x2000000000800800, 0x2000000000000000, 0x2040040000800800, 0x2040041000800800, 0x2000001000000000, 0x0000001000800800, 0x0040040000000000, 0x2040040000000000, 0x0040041000800800, 0x0040041000800800, 0x2040040000800800, 0x2000001000000000, 0x0000001000800800, 0x0000001000000000, 0x2000000000000000, 0x2000000000800800, 0x0040040000800800, 0x0000000000800800, 0x0040041000000000, 0x2040041000800800, 0x0000000000000000, 0x2040041000000000, 0x0000000000800800, 0x0040040000000000, 0x2000001000000000, 0x2040040000800800, 0x0040040000000000, 0x0000000000000000, 0x2040041000800800, 0x2000001000800800, 0x0040041000800800, 0x2040040000000000, 0x0000001000000000, 0x0040041000000000, 0x2000001000800800, 0x0040040000800800, 0x2040040000000000, 0x2000000000000000, 0x2040041000000000, 0x0000001000800800, 0x2000000000800800, ), ( 0x4004000000008008, 0x4004000020000000, 0x0000000000000000, 0x0000200020008008, 0x4004000020000000, 0x0000200000000000, 0x4004200000008008, 0x0000000020000000, 0x4004200000000000, 0x4004200020008008, 0x0000200020000000, 0x0000000000008008, 0x0000200000008008, 0x4004000000008008, 0x0000000020008008, 0x4004200020000000, 0x0000000020000000, 0x4004200000008008, 0x4004000020008008, 0x0000000000000000, 0x0000200000000000, 0x4004000000000000, 0x0000200020008008, 0x4004000020008008, 0x4004200020008008, 0x0000000020008008, 0x0000000000008008, 0x4004200000000000, 0x4004000000000000, 0x0000200020000000, 0x4004200020000000, 0x0000200000008008, 0x4004200000000000, 0x0000000000008008, 0x0000200000008008, 0x4004200020000000, 0x0000200020008008, 0x4004000020000000, 0x0000000000000000, 0x0000200000008008, 0x0000000000008008, 0x0000200000000000, 0x4004000020008008, 0x0000000020000000, 0x4004000020000000, 0x4004200020008008, 0x0000200020000000, 0x4004000000000000, 0x4004200020008008, 0x0000200020000000, 0x0000000020000000, 0x4004200000008008, 0x4004000000008008, 0x0000000020008008, 0x4004200020000000, 0x0000000000000000, 0x0000200000000000, 0x4004000000008008, 0x4004200000008008, 0x0000200020008008, 0x0000000020008008, 0x4004200000000000, 0x4004000000000000, 0x4004000020008008, ), ( 0x0000400400000000, 0x0020000000000000, 0x0020000000100000, 0x0400000000100040, 0x0420400400100040, 0x0400400400000040, 0x0020400400000000, 0x0000000000000000, 0x0000000000100000, 0x0420000000100040, 0x0420000000000040, 0x0000400400100000, 0x0400000000000040, 0x0020400400100000, 0x0000400400100000, 0x0420000000000040, 0x0420000000100040, 0x0000400400000000, 0x0400400400000040, 0x0420400400100040, 0x0000000000000000, 0x0020000000100000, 0x0400000000100040, 0x0020400400000000, 0x0400400400100040, 0x0420400400000040, 0x0020400400100000, 0x0400000000000040, 0x0420400400000040, 0x0400400400100040, 0x0020000000000000, 0x0000000000100000, 0x0420400400000040, 0x0000400400100000, 0x0400400400100040, 0x0420000000000040, 0x0000400400000000, 0x0020000000000000, 0x0000000000100000, 0x0400400400100040, 0x0420000000100040, 0x0420400400000040, 0x0020400400000000, 0x0000000000000000, 0x0020000000000000, 0x0400000000100040, 0x0400000000000040, 0x0020000000100000, 0x0000000000000000, 0x0420000000100040, 0x0020000000100000, 0x0020400400000000, 0x0420000000000040, 0x0000400400000000, 0x0420400400100040, 0x0000000000100000, 0x0020400400100000, 0x0400000000000040, 0x0400400400000040, 0x0420400400100040, 0x0400000000100040, 0x0020400400100000, 0x0000400400100000, 0x0400400400000040, ), ( 0x8008000080082000, 0x0000002080082000, 0x8008002000000000, 0x0000000000000000, 0x0000002000002000, 0x8008000080080000, 0x0000000080082000, 0x8008002080082000, 0x8008000000000000, 0x0000000000002000, 0x0000002080080000, 0x8008002000000000, 0x8008002080080000, 0x8008002000002000, 0x8008000000002000, 0x0000000080082000, 0x0000002000000000, 0x8008002080080000, 0x8008000080080000, 0x0000002000002000, 0x8008002080082000, 0x8008000000002000, 0x0000000000000000, 0x0000002080080000, 0x0000000000002000, 0x0000000080080000, 0x8008002000002000, 0x8008000080082000, 0x0000000080080000, 0x0000002000000000, 0x0000002080082000, 0x8008000000000000, 0x0000000080080000, 0x0000002000000000, 0x8008000000002000, 0x8008002080082000, 0x8008002000000000, 0x0000000000002000, 0x0000000000000000, 0x0000002080080000, 0x8008000080082000, 0x8008002000002000, 0x0000002000002000, 0x8008000080080000, 0x0000002080082000, 0x8008000000000000, 0x8008000080080000, 0x0000002000002000, 0x8008002080082000, 0x0000000080080000, 0x0000000080082000, 0x8008000000002000, 0x0000002080080000, 0x8008002000000000, 0x8008002000002000, 0x0000000080082000, 0x8008000000000000, 0x0000002080082000, 0x8008002080080000, 0x0000000000000000, 0x0000000000002000, 0x8008000080082000, 0x0000002000000000, 0x8008002080080000, ), ) #--------------------------------------------------- # compressed/interleaved => final permutation table # Compression, final permutation, bit reverse #--------------------------------------------------- #NOTE: this was reordered from original table to make perm6464 logic simpler CF6464=( ( 0x0000000000000000, 0x0000002000000000, 0x0000200000000000, 0x0000202000000000, 0x0020000000000000, 0x0020002000000000, 0x0020200000000000, 0x0020202000000000, 0x2000000000000000, 0x2000002000000000, 0x2000200000000000, 0x2000202000000000, 0x2020000000000000, 0x2020002000000000, 0x2020200000000000, 0x2020202000000000, ), ( 0x0000000000000000, 0x0000000200000000, 0x0000020000000000, 0x0000020200000000, 0x0002000000000000, 0x0002000200000000, 0x0002020000000000, 0x0002020200000000, 0x0200000000000000, 0x0200000200000000, 0x0200020000000000, 0x0200020200000000, 0x0202000000000000, 0x0202000200000000, 0x0202020000000000, 0x0202020200000000, ), ( 0x0000000000000000, 0x0000000000000020, 0x0000000000002000, 0x0000000000002020, 0x0000000000200000, 0x0000000000200020, 0x0000000000202000, 0x0000000000202020, 0x0000000020000000, 0x0000000020000020, 0x0000000020002000, 0x0000000020002020, 0x0000000020200000, 0x0000000020200020, 0x0000000020202000, 0x0000000020202020, ), ( 0x0000000000000000, 0x0000000000000002, 0x0000000000000200, 0x0000000000000202, 0x0000000000020000, 0x0000000000020002, 0x0000000000020200, 0x0000000000020202, 0x0000000002000000, 0x0000000002000002, 0x0000000002000200, 0x0000000002000202, 0x0000000002020000, 0x0000000002020002, 0x0000000002020200, 0x0000000002020202, ), ( 0x0000000000000000, 0x0000008000000000, 0x0000800000000000, 0x0000808000000000, 0x0080000000000000, 0x0080008000000000, 0x0080800000000000, 0x0080808000000000, 0x8000000000000000, 0x8000008000000000, 0x8000800000000000, 0x8000808000000000, 0x8080000000000000, 0x8080008000000000, 0x8080800000000000, 0x8080808000000000, ), ( 0x0000000000000000, 0x0000000800000000, 0x0000080000000000, 0x0000080800000000, 0x0008000000000000, 0x0008000800000000, 0x0008080000000000, 0x0008080800000000, 0x0800000000000000, 0x0800000800000000, 0x0800080000000000, 0x0800080800000000, 0x0808000000000000, 0x0808000800000000, 0x0808080000000000, 0x0808080800000000, ), ( 0x0000000000000000, 0x0000000000000080, 0x0000000000008000, 0x0000000000008080, 0x0000000000800000, 0x0000000000800080, 0x0000000000808000, 0x0000000000808080, 0x0000000080000000, 0x0000000080000080, 0x0000000080008000, 0x0000000080008080, 0x0000000080800000, 0x0000000080800080, 0x0000000080808000, 0x0000000080808080, ), ( 0x0000000000000000, 0x0000000000000008, 0x0000000000000800, 0x0000000000000808, 0x0000000000080000, 0x0000000000080008, 0x0000000000080800, 0x0000000000080808, 0x0000000008000000, 0x0000000008000008, 0x0000000008000800, 0x0000000008000808, 0x0000000008080000, 0x0000000008080008, 0x0000000008080800, 0x0000000008080808, ), ( 0x0000000000000000, 0x0000001000000000, 0x0000100000000000, 0x0000101000000000, 0x0010000000000000, 0x0010001000000000, 0x0010100000000000, 0x0010101000000000, 0x1000000000000000, 0x1000001000000000, 0x1000100000000000, 0x1000101000000000, 0x1010000000000000, 0x1010001000000000, 0x1010100000000000, 0x1010101000000000, ), ( 0x0000000000000000, 0x0000000100000000, 0x0000010000000000, 0x0000010100000000, 0x0001000000000000, 0x0001000100000000, 0x0001010000000000, 0x0001010100000000, 0x0100000000000000, 0x0100000100000000, 0x0100010000000000, 0x0100010100000000, 0x0101000000000000, 0x0101000100000000, 0x0101010000000000, 0x0101010100000000, ), ( 0x0000000000000000, 0x0000000000000010, 0x0000000000001000, 0x0000000000001010, 0x0000000000100000, 0x0000000000100010, 0x0000000000101000, 0x0000000000101010, 0x0000000010000000, 0x0000000010000010, 0x0000000010001000, 0x0000000010001010, 0x0000000010100000, 0x0000000010100010, 0x0000000010101000, 0x0000000010101010, ), ( 0x0000000000000000, 0x0000000000000001, 0x0000000000000100, 0x0000000000000101, 0x0000000000010000, 0x0000000000010001, 0x0000000000010100, 0x0000000000010101, 0x0000000001000000, 0x0000000001000001, 0x0000000001000100, 0x0000000001000101, 0x0000000001010000, 0x0000000001010001, 0x0000000001010100, 0x0000000001010101, ), ( 0x0000000000000000, 0x0000004000000000, 0x0000400000000000, 0x0000404000000000, 0x0040000000000000, 0x0040004000000000, 0x0040400000000000, 0x0040404000000000, 0x4000000000000000, 0x4000004000000000, 0x4000400000000000, 0x4000404000000000, 0x4040000000000000, 0x4040004000000000, 0x4040400000000000, 0x4040404000000000, ), ( 0x0000000000000000, 0x0000000400000000, 0x0000040000000000, 0x0000040400000000, 0x0004000000000000, 0x0004000400000000, 0x0004040000000000, 0x0004040400000000, 0x0400000000000000, 0x0400000400000000, 0x0400040000000000, 0x0400040400000000, 0x0404000000000000, 0x0404000400000000, 0x0404040000000000, 0x0404040400000000, ), ( 0x0000000000000000, 0x0000000000000040, 0x0000000000004000, 0x0000000000004040, 0x0000000000400000, 0x0000000000400040, 0x0000000000404000, 0x0000000000404040, 0x0000000040000000, 0x0000000040000040, 0x0000000040004000, 0x0000000040004040, 0x0000000040400000, 0x0000000040400040, 0x0000000040404000, 0x0000000040404040, ), ( 0x0000000000000000, 0x0000000000000004, 0x0000000000000400, 0x0000000000000404, 0x0000000000040000, 0x0000000000040004, 0x0000000000040400, 0x0000000000040404, 0x0000000004000000, 0x0000000004000004, 0x0000000004000400, 0x0000000004000404, 0x0000000004040000, 0x0000000004040004, 0x0000000004040400, 0x0000000004040404, ), ) #========================================================= #eof load_data #========================================================= def permute(c, p): """Returns the permutation of the given 32-bit or 64-bit code with the specified permutation table.""" #NOTE: only difference between 32 & 64 bit permutations #is that len(p)==8 for 32 bit, and len(p)==16 for 64 bit. out = 0 for r in p: out |= r[c&0xf] c >>= 4 return out #========================================================= #des frontend #========================================================= def expand_des_key(key): "convert 7 byte des key to 8 byte des key (by adding parity bit every 7 bits)" if not isinstance(key, bytes): raise TypeError("key must be bytes, not %s" % (type(key),)) #NOTE: could probably do this much more cleverly and efficiently, # but no need really given it's use. #NOTE: the parity bits are generally ignored, including by des_encrypt_block below assert len(key) == 7 def iter_bits(source): for c in source: v = bord(c) for i in xrange(7,-1,-1): yield (v>>i) & 1 out = 0 p = 1 for i, b in enumerate(iter_bits(key)): out = (out<<1) + b p ^= b if i % 7 == 6: out = (out<<1) + p p = 1 return bjoin_ints( ((out>>s) & 0xFF) for s in xrange(8*7,-8,-8) ) def des_encrypt_block(key, input): """do traditional encryption of a single DES block :arg key: 8 byte des key :arg input: 8 byte plaintext :returns: 8 byte ciphertext all values must be :class:`bytes` """ if not isinstance(key, bytes): raise TypeError("key must be bytes, not %s" % (type(key),)) if len(key) == 7: key = expand_des_key(key) assert len(key) == 8 if not isinstance(input, bytes): raise TypeError("input must be bytes, not %s" % (type(input),)) assert len(input) == 8 input = bytes_to_int(input) key = bytes_to_int(key) out = mdes_encrypt_int_block(key, input, 0, 1) return int_to_bytes(out, 8) def mdes_encrypt_int_block(key, input, salt=0, rounds=1): """do modified multi-round DES encryption of single DES block. the function implements the salted, variable-round version of DES used by :class:`~passlib.hash.des_crypt` and related variants. it also can perform regular DES encryption by using ``salt=0, rounds=1`` (the default values). :arg key: 8 byte des key as integer :arg input: 8 byte plaintext block as integer :arg salt: integer 24 bit salt, used to mutate output (defaults to 0) :arg rounds: number of rounds of DES encryption to apply (defaults to 1) The salt is used to to mutate the normal DES encrypt operation by swapping bits ``i`` and ``i+24`` in the DES E-Box output if and only if bit ``i`` is set in the salt value. Thus, if the salt is set to ``0``, normal DES encryption is performed. :returns: resulting block as 8 byte integer """ global SPE, PCXROT, IE3264, CF6464 #bounds check assert 0 <= input <= INT_64_MAX, "input value out of range" assert 0 <= salt <= INT_24_MAX, "salt value out of range" assert rounds >= 0, "rounds out of range" assert 0 <= key <= INT_64_MAX, "key value out of range" #load tables if not already done if PCXROT is None: load_tables() #convert key int -> key schedule #NOTE: generation was modified to output two elements at a time, #to optimize for per-round algorithm below. mask = ~0x0303030300000000 def _gen(K): for p_even, p_odd in PCXROT: K1 = permute(K, p_even) K = permute(K1, p_odd) yield K1 & mask, K & mask ks_list = list(_gen(key)) #expand 24 bit salt -> 32 bit salt = ( ((salt & 0x00003f) << 26) | ((salt & 0x000fc0) << 12) | ((salt & 0x03f000) >> 2) | ((salt & 0xfc0000) >> 16) ) #init L & R if input == 0: L = R = 0 else: L = ((input >> 31) & 0xaaaaaaaa) | (input & 0x55555555) L = permute(L, IE3264) R = ((input >> 32) & 0xaaaaaaaa) | ((input >> 1) & 0x55555555) R = permute(R, IE3264) #load SPE into local vars to speed things up and remove an array access call SPE0, SPE1, SPE2, SPE3, SPE4, SPE5, SPE6, SPE7 = SPE #run specified number of passed while rounds: rounds -= 1 #run over each part of the schedule, 2 parts at a time for ks_even, ks_odd in ks_list: k = ((R>>32) ^ R) & salt #use the salt to alter specific bits B = (k<<32) ^ k ^ R ^ ks_even L ^= (SPE0[(B>>58)&0x3f] ^ SPE1[(B>>50)&0x3f] ^ SPE2[(B>>42)&0x3f] ^ SPE3[(B>>34)&0x3f] ^ SPE4[(B>>26)&0x3f] ^ SPE5[(B>>18)&0x3f] ^ SPE6[(B>>10)&0x3f] ^ SPE7[(B>>2)&0x3f]) k = ((L>>32) ^ L) & salt #use the salt to alter specific bits B = (k<<32) ^ k ^ L ^ ks_odd R ^= (SPE0[(B>>58)&0x3f] ^ SPE1[(B>>50)&0x3f] ^ SPE2[(B>>42)&0x3f] ^ SPE3[(B>>34)&0x3f] ^ SPE4[(B>>26)&0x3f] ^ SPE5[(B>>18)&0x3f] ^ SPE6[(B>>10)&0x3f] ^ SPE7[(B>>2)&0x3f]) # swap L and R L, R = R, L C = ( ((L>>3) & 0x0f0f0f0f00000000) | ((L<<33) & 0xf0f0f0f000000000) | ((R>>35) & 0x000000000f0f0f0f) | ((R<<1) & 0x00000000f0f0f0f0) ) C = permute(C, CF6464) return C #========================================================= #eof #=========================================================