Commit 8879d88d authored by Niels Möller's avatar Niels Möller
Browse files

Added gosthash, ported from rhash by Nikos Mavrogiannopoulos.

parent 13d1016e
2012-11-08 Niels Möller <nisse@lysator.liu.se>
Gost hash function, ported from Aleksey Kravchenko's rhash library
by Nikos Mavrogiannopoulos.
* gosthash94.c: New file.
* gosthash94.h: New file.
* gosthash94-meta.c: New file.
* nettle-meta.h (nettle_gosthash94): Declare.
* Makefile.in (nettle_SOURCES): Added gosthash94.c and
gosthash94-meta.c.
(HEADERS): Added gosthash94.h.
* testsuite/gosthash94-test.c: New file.
* testsuite/Makefile.in (TS_NETTLE_SOURCES): Added
gosthash94-test.c.
2012-10-29 Niels Möller <nisse@lysator.liu.se>
From Martin Storsjö:
......
......@@ -64,7 +64,7 @@ nettle_SOURCES = aes-decrypt-internal.c aes-decrypt.c \
aes-encrypt-internal.c aes-encrypt.c aes-encrypt-table.c \
aes-set-encrypt-key.c aes-set-decrypt-key.c aes-meta.c \
arcfour.c arcfour-crypt.c arcfour-meta.c \
arctwo.c arctwo-meta.c \
arctwo.c arctwo-meta.c gosthash94-meta.c \
base16-encode.c base16-decode.c base16-meta.c \
base64-encode.c base64-decode.c base64-meta.c \
camellia-crypt.c camellia-crypt-internal.c \
......@@ -81,6 +81,7 @@ nettle_SOURCES = aes-decrypt-internal.c aes-decrypt.c \
knuth-lfib.c \
md2.c md2-meta.c md4.c md4-meta.c \
md5.c md5-compress.c md5-compat.c md5-meta.c \
gosthash94.c \
ripemd160.c ripemd160-compress.c ripemd160-meta.c \
salsa20-core-internal.c \
salsa20-crypt.c salsa20-set-key.c \
......@@ -129,6 +130,7 @@ HEADERS = aes.h arcfour.h arctwo.h asn1.h bignum.h blowfish.h \
knuth-lfib.h \
macros.h \
md2.h md4.h \
gosthash94.h \
md5.h md5-compat.h \
memxor.h \
nettle-meta.h nettle-types.h \
......
/* gosthash94-meta.c */
/* nettle, low-level cryptographics library
*
* Copyright (C) 2012 Nikos Mavrogiannopoulos, Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "nettle-meta.h"
#include "gosthash94.h"
const struct nettle_hash nettle_gosthash94
= _NETTLE_HASH(gosthash94, GOSTHASH94);
/* gost.c - an implementation of GOST Hash Function
* based on the Russian Standard GOST R 34.11-94.
* See also RFC 4357.
*
* Copyright: 2009-2012 Aleksey Kravchenko <rhash.admin@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Ported to nettle by Nikos Mavrogiannopoulos.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <string.h>
#include "macros.h"
#include "nettle-write.h"
#include "gosthash94.h"
/* pre-initialized GOST lookup tables based on rotated S-Box */
static const uint32_t gosthash94_sbox[4][256] = {
{
0x72000, 0x75000, 0x74800, 0x71000, 0x76800,
0x74000, 0x70000, 0x77000, 0x73000, 0x75800,
0x70800, 0x76000, 0x73800, 0x77800, 0x72800,
0x71800, 0x5A000, 0x5D000, 0x5C800, 0x59000,
0x5E800, 0x5C000, 0x58000, 0x5F000, 0x5B000,
0x5D800, 0x58800, 0x5E000, 0x5B800, 0x5F800,
0x5A800, 0x59800, 0x22000, 0x25000, 0x24800,
0x21000, 0x26800, 0x24000, 0x20000, 0x27000,
0x23000, 0x25800, 0x20800, 0x26000, 0x23800,
0x27800, 0x22800, 0x21800, 0x62000, 0x65000,
0x64800, 0x61000, 0x66800, 0x64000, 0x60000,
0x67000, 0x63000, 0x65800, 0x60800, 0x66000,
0x63800, 0x67800, 0x62800, 0x61800, 0x32000,
0x35000, 0x34800, 0x31000, 0x36800, 0x34000,
0x30000, 0x37000, 0x33000, 0x35800, 0x30800,
0x36000, 0x33800, 0x37800, 0x32800, 0x31800,
0x6A000, 0x6D000, 0x6C800, 0x69000, 0x6E800,
0x6C000, 0x68000, 0x6F000, 0x6B000, 0x6D800,
0x68800, 0x6E000, 0x6B800, 0x6F800, 0x6A800,
0x69800, 0x7A000, 0x7D000, 0x7C800, 0x79000,
0x7E800, 0x7C000, 0x78000, 0x7F000, 0x7B000,
0x7D800, 0x78800, 0x7E000, 0x7B800, 0x7F800,
0x7A800, 0x79800, 0x52000, 0x55000, 0x54800,
0x51000, 0x56800, 0x54000, 0x50000, 0x57000,
0x53000, 0x55800, 0x50800, 0x56000, 0x53800,
0x57800, 0x52800, 0x51800, 0x12000, 0x15000,
0x14800, 0x11000, 0x16800, 0x14000, 0x10000,
0x17000, 0x13000, 0x15800, 0x10800, 0x16000,
0x13800, 0x17800, 0x12800, 0x11800, 0x1A000,
0x1D000, 0x1C800, 0x19000, 0x1E800, 0x1C000,
0x18000, 0x1F000, 0x1B000, 0x1D800, 0x18800,
0x1E000, 0x1B800, 0x1F800, 0x1A800, 0x19800,
0x42000, 0x45000, 0x44800, 0x41000, 0x46800,
0x44000, 0x40000, 0x47000, 0x43000, 0x45800,
0x40800, 0x46000, 0x43800, 0x47800, 0x42800,
0x41800, 0xA000, 0xD000, 0xC800, 0x9000,
0xE800, 0xC000, 0x8000, 0xF000, 0xB000,
0xD800, 0x8800, 0xE000, 0xB800, 0xF800,
0xA800, 0x9800, 0x2000, 0x5000, 0x4800,
0x1000, 0x6800, 0x4000, 0x0, 0x7000,
0x3000, 0x5800, 0x800, 0x6000, 0x3800,
0x7800, 0x2800, 0x1800, 0x3A000, 0x3D000,
0x3C800, 0x39000, 0x3E800, 0x3C000, 0x38000,
0x3F000, 0x3B000, 0x3D800, 0x38800, 0x3E000,
0x3B800, 0x3F800, 0x3A800, 0x39800, 0x2A000,
0x2D000, 0x2C800, 0x29000, 0x2E800, 0x2C000,
0x28000, 0x2F000, 0x2B000, 0x2D800, 0x28800,
0x2E000, 0x2B800, 0x2F800, 0x2A800, 0x29800,
0x4A000, 0x4D000, 0x4C800, 0x49000, 0x4E800,
0x4C000, 0x48000, 0x4F000, 0x4B000, 0x4D800,
0x48800, 0x4E000, 0x4B800, 0x4F800, 0x4A800,
0x49800
}, {
0x3A80000, 0x3C00000, 0x3880000, 0x3E80000, 0x3D00000,
0x3980000, 0x3A00000, 0x3900000, 0x3F00000, 0x3F80000,
0x3E00000, 0x3B80000, 0x3B00000, 0x3800000, 0x3C80000,
0x3D80000, 0x6A80000, 0x6C00000, 0x6880000, 0x6E80000,
0x6D00000, 0x6980000, 0x6A00000, 0x6900000, 0x6F00000,
0x6F80000, 0x6E00000, 0x6B80000, 0x6B00000, 0x6800000,
0x6C80000, 0x6D80000, 0x5280000, 0x5400000, 0x5080000,
0x5680000, 0x5500000, 0x5180000, 0x5200000, 0x5100000,
0x5700000, 0x5780000, 0x5600000, 0x5380000, 0x5300000,
0x5000000, 0x5480000, 0x5580000, 0xA80000, 0xC00000,
0x880000, 0xE80000, 0xD00000, 0x980000, 0xA00000,
0x900000, 0xF00000, 0xF80000, 0xE00000, 0xB80000,
0xB00000, 0x800000, 0xC80000, 0xD80000, 0x280000,
0x400000, 0x80000, 0x680000, 0x500000, 0x180000,
0x200000, 0x100000, 0x700000, 0x780000, 0x600000,
0x380000, 0x300000, 0x0, 0x480000, 0x580000,
0x4280000, 0x4400000, 0x4080000, 0x4680000, 0x4500000,
0x4180000, 0x4200000, 0x4100000, 0x4700000, 0x4780000,
0x4600000, 0x4380000, 0x4300000, 0x4000000, 0x4480000,
0x4580000, 0x4A80000, 0x4C00000, 0x4880000, 0x4E80000,
0x4D00000, 0x4980000, 0x4A00000, 0x4900000, 0x4F00000,
0x4F80000, 0x4E00000, 0x4B80000, 0x4B00000, 0x4800000,
0x4C80000, 0x4D80000, 0x7A80000, 0x7C00000, 0x7880000,
0x7E80000, 0x7D00000, 0x7980000, 0x7A00000, 0x7900000,
0x7F00000, 0x7F80000, 0x7E00000, 0x7B80000, 0x7B00000,
0x7800000, 0x7C80000, 0x7D80000, 0x7280000, 0x7400000,
0x7080000, 0x7680000, 0x7500000, 0x7180000, 0x7200000,
0x7100000, 0x7700000, 0x7780000, 0x7600000, 0x7380000,
0x7300000, 0x7000000, 0x7480000, 0x7580000, 0x2280000,
0x2400000, 0x2080000, 0x2680000, 0x2500000, 0x2180000,
0x2200000, 0x2100000, 0x2700000, 0x2780000, 0x2600000,
0x2380000, 0x2300000, 0x2000000, 0x2480000, 0x2580000,
0x3280000, 0x3400000, 0x3080000, 0x3680000, 0x3500000,
0x3180000, 0x3200000, 0x3100000, 0x3700000, 0x3780000,
0x3600000, 0x3380000, 0x3300000, 0x3000000, 0x3480000,
0x3580000, 0x6280000, 0x6400000, 0x6080000, 0x6680000,
0x6500000, 0x6180000, 0x6200000, 0x6100000, 0x6700000,
0x6780000, 0x6600000, 0x6380000, 0x6300000, 0x6000000,
0x6480000, 0x6580000, 0x5A80000, 0x5C00000, 0x5880000,
0x5E80000, 0x5D00000, 0x5980000, 0x5A00000, 0x5900000,
0x5F00000, 0x5F80000, 0x5E00000, 0x5B80000, 0x5B00000,
0x5800000, 0x5C80000, 0x5D80000, 0x1280000, 0x1400000,
0x1080000, 0x1680000, 0x1500000, 0x1180000, 0x1200000,
0x1100000, 0x1700000, 0x1780000, 0x1600000, 0x1380000,
0x1300000, 0x1000000, 0x1480000, 0x1580000, 0x2A80000,
0x2C00000, 0x2880000, 0x2E80000, 0x2D00000, 0x2980000,
0x2A00000, 0x2900000, 0x2F00000, 0x2F80000, 0x2E00000,
0x2B80000, 0x2B00000, 0x2800000, 0x2C80000, 0x2D80000,
0x1A80000, 0x1C00000, 0x1880000, 0x1E80000, 0x1D00000,
0x1980000, 0x1A00000, 0x1900000, 0x1F00000, 0x1F80000,
0x1E00000, 0x1B80000, 0x1B00000, 0x1800000, 0x1C80000,
0x1D80000
}, {
0x30000002, 0x60000002, 0x38000002, 0x8000002,
0x28000002, 0x78000002, 0x68000002, 0x40000002,
0x20000002, 0x50000002, 0x48000002, 0x70000002,
0x2, 0x18000002, 0x58000002, 0x10000002,
0xB0000005, 0xE0000005, 0xB8000005, 0x88000005,
0xA8000005, 0xF8000005, 0xE8000005, 0xC0000005,
0xA0000005, 0xD0000005, 0xC8000005, 0xF0000005,
0x80000005, 0x98000005, 0xD8000005, 0x90000005,
0x30000005, 0x60000005, 0x38000005, 0x8000005,
0x28000005, 0x78000005, 0x68000005, 0x40000005,
0x20000005, 0x50000005, 0x48000005, 0x70000005,
0x5, 0x18000005, 0x58000005, 0x10000005,
0x30000000, 0x60000000, 0x38000000, 0x8000000,
0x28000000, 0x78000000, 0x68000000, 0x40000000,
0x20000000, 0x50000000, 0x48000000, 0x70000000,
0x0, 0x18000000, 0x58000000, 0x10000000,
0xB0000003, 0xE0000003, 0xB8000003, 0x88000003,
0xA8000003, 0xF8000003, 0xE8000003, 0xC0000003,
0xA0000003, 0xD0000003, 0xC8000003, 0xF0000003,
0x80000003, 0x98000003, 0xD8000003, 0x90000003,
0x30000001, 0x60000001, 0x38000001, 0x8000001,
0x28000001, 0x78000001, 0x68000001, 0x40000001,
0x20000001, 0x50000001, 0x48000001, 0x70000001,
0x1, 0x18000001, 0x58000001, 0x10000001,
0xB0000000, 0xE0000000, 0xB8000000, 0x88000000,
0xA8000000, 0xF8000000, 0xE8000000, 0xC0000000,
0xA0000000, 0xD0000000, 0xC8000000, 0xF0000000,
0x80000000, 0x98000000, 0xD8000000, 0x90000000,
0xB0000006, 0xE0000006, 0xB8000006, 0x88000006,
0xA8000006, 0xF8000006, 0xE8000006, 0xC0000006,
0xA0000006, 0xD0000006, 0xC8000006, 0xF0000006,
0x80000006, 0x98000006, 0xD8000006, 0x90000006,
0xB0000001, 0xE0000001, 0xB8000001, 0x88000001,
0xA8000001, 0xF8000001, 0xE8000001, 0xC0000001,
0xA0000001, 0xD0000001, 0xC8000001, 0xF0000001,
0x80000001, 0x98000001, 0xD8000001, 0x90000001,
0x30000003, 0x60000003, 0x38000003, 0x8000003,
0x28000003, 0x78000003, 0x68000003, 0x40000003,
0x20000003, 0x50000003, 0x48000003, 0x70000003,
0x3, 0x18000003, 0x58000003, 0x10000003,
0x30000004, 0x60000004, 0x38000004, 0x8000004,
0x28000004, 0x78000004, 0x68000004, 0x40000004,
0x20000004, 0x50000004, 0x48000004, 0x70000004,
0x4, 0x18000004, 0x58000004, 0x10000004,
0xB0000002, 0xE0000002, 0xB8000002, 0x88000002,
0xA8000002, 0xF8000002, 0xE8000002, 0xC0000002,
0xA0000002, 0xD0000002, 0xC8000002, 0xF0000002,
0x80000002, 0x98000002, 0xD8000002, 0x90000002,
0xB0000004, 0xE0000004, 0xB8000004, 0x88000004,
0xA8000004, 0xF8000004, 0xE8000004, 0xC0000004,
0xA0000004, 0xD0000004, 0xC8000004, 0xF0000004,
0x80000004, 0x98000004, 0xD8000004, 0x90000004,
0x30000006, 0x60000006, 0x38000006, 0x8000006,
0x28000006, 0x78000006, 0x68000006, 0x40000006,
0x20000006, 0x50000006, 0x48000006, 0x70000006,
0x6, 0x18000006, 0x58000006, 0x10000006,
0xB0000007, 0xE0000007, 0xB8000007, 0x88000007,
0xA8000007, 0xF8000007, 0xE8000007, 0xC0000007,
0xA0000007, 0xD0000007, 0xC8000007, 0xF0000007,
0x80000007, 0x98000007, 0xD8000007, 0x90000007,
0x30000007, 0x60000007, 0x38000007, 0x8000007,
0x28000007, 0x78000007, 0x68000007, 0x40000007,
0x20000007, 0x50000007, 0x48000007, 0x70000007,
0x7, 0x18000007, 0x58000007, 0x10000007
}, {
0xE8, 0xD8, 0xA0, 0x88, 0x98, 0xF8, 0xA8, 0xC8, 0x80, 0xD0,
0xF0, 0xB8, 0xB0, 0xC0, 0x90, 0xE0, 0x7E8, 0x7D8, 0x7A0, 0x788,
0x798, 0x7F8, 0x7A8, 0x7C8, 0x780, 0x7D0, 0x7F0, 0x7B8, 0x7B0, 0x7C0,
0x790, 0x7E0, 0x6E8, 0x6D8, 0x6A0, 0x688, 0x698, 0x6F8, 0x6A8, 0x6C8,
0x680, 0x6D0, 0x6F0, 0x6B8, 0x6B0, 0x6C0, 0x690, 0x6E0, 0x68, 0x58,
0x20, 0x8, 0x18, 0x78, 0x28, 0x48, 0x0, 0x50, 0x70, 0x38,
0x30, 0x40, 0x10, 0x60, 0x2E8, 0x2D8, 0x2A0, 0x288, 0x298, 0x2F8,
0x2A8, 0x2C8, 0x280, 0x2D0, 0x2F0, 0x2B8, 0x2B0, 0x2C0, 0x290, 0x2E0,
0x3E8, 0x3D8, 0x3A0, 0x388, 0x398, 0x3F8, 0x3A8, 0x3C8, 0x380, 0x3D0,
0x3F0, 0x3B8, 0x3B0, 0x3C0, 0x390, 0x3E0, 0x568, 0x558, 0x520, 0x508,
0x518, 0x578, 0x528, 0x548, 0x500, 0x550, 0x570, 0x538, 0x530, 0x540,
0x510, 0x560, 0x268, 0x258, 0x220, 0x208, 0x218, 0x278, 0x228, 0x248,
0x200, 0x250, 0x270, 0x238, 0x230, 0x240, 0x210, 0x260, 0x4E8, 0x4D8,
0x4A0, 0x488, 0x498, 0x4F8, 0x4A8, 0x4C8, 0x480, 0x4D0, 0x4F0, 0x4B8,
0x4B0, 0x4C0, 0x490, 0x4E0, 0x168, 0x158, 0x120, 0x108, 0x118, 0x178,
0x128, 0x148, 0x100, 0x150, 0x170, 0x138, 0x130, 0x140, 0x110, 0x160,
0x1E8, 0x1D8, 0x1A0, 0x188, 0x198, 0x1F8, 0x1A8, 0x1C8, 0x180, 0x1D0,
0x1F0, 0x1B8, 0x1B0, 0x1C0, 0x190, 0x1E0, 0x768, 0x758, 0x720, 0x708,
0x718, 0x778, 0x728, 0x748, 0x700, 0x750, 0x770, 0x738, 0x730, 0x740,
0x710, 0x760, 0x368, 0x358, 0x320, 0x308, 0x318, 0x378, 0x328, 0x348,
0x300, 0x350, 0x370, 0x338, 0x330, 0x340, 0x310, 0x360, 0x5E8, 0x5D8,
0x5A0, 0x588, 0x598, 0x5F8, 0x5A8, 0x5C8, 0x580, 0x5D0, 0x5F0, 0x5B8,
0x5B0, 0x5C0, 0x590, 0x5E0, 0x468, 0x458, 0x420, 0x408, 0x418, 0x478,
0x428, 0x448, 0x400, 0x450, 0x470, 0x438, 0x430, 0x440, 0x410, 0x460,
0x668, 0x658, 0x620, 0x608, 0x618, 0x678, 0x628, 0x648, 0x600, 0x650,
0x670, 0x638, 0x630, 0x640, 0x610, 0x660
}
};
/**
* Initialize algorithm context before calculating hash
* with test parameters set.
*
* @param ctx context to initalize
*/
void
gosthash94_init (struct gosthash94_ctx *ctx)
{
memset (ctx, 0, sizeof (struct gosthash94_ctx));
}
/*
* A macro that performs a full encryption round of GOST 28147-89.
* Temporary variables tmp assumed and variables r and l for left and right
* blocks.
*/
#define GOST_ENCRYPT_ROUND(key1, key2, sbox) \
tmp = (key1) + r; \
l ^= (sbox)[0][tmp & 0xff] ^ (sbox)[1][(tmp >> 8) & 0xff] ^ \
(sbox)[2][(tmp >> 16) & 0xff] ^ (sbox)[3][tmp >> 24]; \
tmp = (key2) + l; \
r ^= (sbox)[0][tmp & 0xff] ^ (sbox)[1][(tmp >> 8) & 0xff] ^ \
(sbox)[2][(tmp >> 16) & 0xff] ^ (sbox)[3][tmp >> 24];
/* encrypt a block with the given key */
#define GOST_ENCRYPT(result, i, key, hash, sbox) \
r = hash[i], l = hash[i + 1]; \
GOST_ENCRYPT_ROUND(key[0], key[1], sbox) \
GOST_ENCRYPT_ROUND(key[2], key[3], sbox) \
GOST_ENCRYPT_ROUND(key[4], key[5], sbox) \
GOST_ENCRYPT_ROUND(key[6], key[7], sbox) \
GOST_ENCRYPT_ROUND(key[0], key[1], sbox) \
GOST_ENCRYPT_ROUND(key[2], key[3], sbox) \
GOST_ENCRYPT_ROUND(key[4], key[5], sbox) \
GOST_ENCRYPT_ROUND(key[6], key[7], sbox) \
GOST_ENCRYPT_ROUND(key[0], key[1], sbox) \
GOST_ENCRYPT_ROUND(key[2], key[3], sbox) \
GOST_ENCRYPT_ROUND(key[4], key[5], sbox) \
GOST_ENCRYPT_ROUND(key[6], key[7], sbox) \
GOST_ENCRYPT_ROUND(key[7], key[6], sbox) \
GOST_ENCRYPT_ROUND(key[5], key[4], sbox) \
GOST_ENCRYPT_ROUND(key[3], key[2], sbox) \
GOST_ENCRYPT_ROUND(key[1], key[0], sbox) \
result[i] = l, result[i + 1] = r;
/**
* The core transformation. Process a 512-bit block.
*
* @param hash intermediate message hash
* @param block the message block to process
*/
static void
gost_block_compress (struct gosthash94_ctx *ctx, const uint32_t *block)
{
unsigned i;
uint32_t key[8], u[8], v[8], w[8], s[8];
uint32_t l, r, tmp;
/* u := hash, v := <256-bit message block> */
memcpy (u, ctx->hash, sizeof (u));
memcpy (v, block, sizeof (v));
/* w := u xor v */
w[0] = u[0] ^ v[0], w[1] = u[1] ^ v[1];
w[2] = u[2] ^ v[2], w[3] = u[3] ^ v[3];
w[4] = u[4] ^ v[4], w[5] = u[5] ^ v[5];
w[6] = u[6] ^ v[6], w[7] = u[7] ^ v[7];
/* calculate keys, encrypt hash and store result to the s[] array */
for (i = 0;; i += 2)
{
/* key generation: key_i := P(w) */
key[0] =
(w[0] & 0x000000ff) | ((w[2] & 0x000000ff) << 8) |
((w[4] & 0x000000ff) << 16) | ((w[6] & 0x000000ff) << 24);
key[1] =
((w[0] & 0x0000ff00) >> 8) | (w[2] & 0x0000ff00) |
((w[4] & 0x0000ff00) << 8) | ((w[6] & 0x0000ff00) << 16);
key[2] =
((w[0] & 0x00ff0000) >> 16) | ((w[2] & 0x00ff0000) >> 8) |
(w[4] & 0x00ff0000) | ((w[6] & 0x00ff0000) << 8);
key[3] =
((w[0] & 0xff000000) >> 24) | ((w[2] & 0xff000000) >> 16) |
((w[4] & 0xff000000) >> 8) | (w[6] & 0xff000000);
key[4] =
(w[1] & 0x000000ff) | ((w[3] & 0x000000ff) << 8) |
((w[5] & 0x000000ff) << 16) | ((w[7] & 0x000000ff) << 24);
key[5] =
((w[1] & 0x0000ff00) >> 8) | (w[3] & 0x0000ff00) |
((w[5] & 0x0000ff00) << 8) | ((w[7] & 0x0000ff00) << 16);
key[6] =
((w[1] & 0x00ff0000) >> 16) | ((w[3] & 0x00ff0000) >> 8) |
(w[5] & 0x00ff0000) | ((w[7] & 0x00ff0000) << 8);
key[7] =
((w[1] & 0xff000000) >> 24) | ((w[3] & 0xff000000) >> 16) |
((w[5] & 0xff000000) >> 8) | (w[7] & 0xff000000);
/* encryption: s_i := E_{key_i} (h_i) */
GOST_ENCRYPT (s, i, key, ctx->hash, gosthash94_sbox);
if (i == 0)
{
/* w:= A(u) ^ A^2(v) */
w[0] = u[2] ^ v[4], w[1] = u[3] ^ v[5];
w[2] = u[4] ^ v[6], w[3] = u[5] ^ v[7];
w[4] = u[6] ^ (v[0] ^= v[2]);
w[5] = u[7] ^ (v[1] ^= v[3]);
w[6] = (u[0] ^= u[2]) ^ (v[2] ^= v[4]);
w[7] = (u[1] ^= u[3]) ^ (v[3] ^= v[5]);
}
else if ((i & 2) != 0)
{
if (i == 6)
break;
/* w := A^2(u) xor A^4(v) xor C_3; u := A(u) xor C_3 */
/* C_3=0xff00ffff000000ffff0000ff00ffff0000ff00ff00ff00ffff00ff00ff00ff00 */
u[2] ^= u[4] ^ 0x000000ff;
u[3] ^= u[5] ^ 0xff00ffff;
u[4] ^= 0xff00ff00;
u[5] ^= 0xff00ff00;
u[6] ^= 0x00ff00ff;
u[7] ^= 0x00ff00ff;
u[0] ^= 0x00ffff00;
u[1] ^= 0xff0000ff;
w[0] = u[4] ^ v[0];
w[2] = u[6] ^ v[2];
w[4] = u[0] ^ (v[4] ^= v[6]);
w[6] = u[2] ^ (v[6] ^= v[0]);
w[1] = u[5] ^ v[1];
w[3] = u[7] ^ v[3];
w[5] = u[1] ^ (v[5] ^= v[7]);
w[7] = u[3] ^ (v[7] ^= v[1]);
}
else
{
/* i==4 here */
/* w:= A( A^2(u) xor C_3 ) xor A^6(v) */
w[0] = u[6] ^ v[4], w[1] = u[7] ^ v[5];
w[2] = u[0] ^ v[6], w[3] = u[1] ^ v[7];
w[4] = u[2] ^ (v[0] ^= v[2]);
w[5] = u[3] ^ (v[1] ^= v[3]);
w[6] = (u[4] ^= u[6]) ^ (v[2] ^= v[4]);
w[7] = (u[5] ^= u[7]) ^ (v[3] ^= v[5]);
}
}
/* step hash function: x(block, hash) := psi^61(hash xor psi(block xor psi^12(S))) */
/* 12 rounds of the LFSR and xor in <message block> */
u[0] = block[0] ^ s[6];
u[1] = block[1] ^ s[7];
u[2] =
block[2] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff) ^ (s[1] &
0xffff)
^ (s[1] >> 16) ^ (s[2] << 16) ^ s[6] ^ (s[6] << 16) ^ (s[7] &
0xffff0000)
^ (s[7] >> 16);
u[3] =
block[3] ^ (s[0] & 0xffff) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^ (s[1]
<<
16)
^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^ (s[3] << 16) ^ s[6]
^ (s[6] << 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^ (s[7] << 16) ^
(s[7] >> 16);
u[4] =
block[4] ^ (s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[0] >> 16) ^
(s[1] & 0xffff0000) ^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^
(s[3] << 16) ^ (s[3] >> 16) ^ (s[4] << 16) ^ (s[6] << 16) ^ (s[6]
>> 16)
^ (s[7] & 0xffff) ^ (s[7] << 16) ^ (s[7] >> 16);
u[5] =
block[5] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff0000) ^
(s[1] & 0xffff) ^ s[2] ^ (s[2] >> 16) ^ (s[3] << 16) ^ (s[3] >> 16)
^ (s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^ (s[6] << 16) ^ (s[6]
>>
16)
^ (s[7] & 0xffff0000) ^ (s[7] << 16) ^ (s[7] >> 16);
u[6] =
block[6] ^ s[0] ^ (s[1] >> 16) ^ (s[2] << 16) ^ s[3] ^ (s[3] >> 16)
^ (s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^ (s[5] >> 16) ^ s[6]
^ (s[6] << 16) ^ (s[6] >> 16) ^ (s[7] << 16);
u[7] =
block[7] ^ (s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^
(s[1] << 16) ^ (s[2] >> 16) ^ (s[3] << 16) ^ s[4] ^ (s[4] >> 16) ^
(s[5] << 16) ^ (s[5] >> 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^
(s[7] << 16) ^ (s[7] >> 16);
/* 1 round of the LFSR (a mixing transformation) and xor with <hash> */
v[0] = ctx->hash[0] ^ (u[1] << 16) ^ (u[0] >> 16);
v[1] = ctx->hash[1] ^ (u[2] << 16) ^ (u[1] >> 16);
v[2] = ctx->hash[2] ^ (u[3] << 16) ^ (u[2] >> 16);
v[3] = ctx->hash[3] ^ (u[4] << 16) ^ (u[3] >> 16);
v[4] = ctx->hash[4] ^ (u[5] << 16) ^ (u[4] >> 16);
v[5] = ctx->hash[5] ^ (u[6] << 16) ^ (u[5] >> 16);
v[6] = ctx->hash[6] ^ (u[7] << 16) ^ (u[6] >> 16);
v[7] =
ctx->
hash[7] ^ (u[0] & 0xffff0000) ^ (u[0] << 16) ^ (u[1] & 0xffff0000)
^ (u[1] << 16) ^ (u[6] << 16) ^ (u[7] & 0xffff0000) ^ (u[7] >> 16);
/* 61 rounds of LFSR, mixing up hash */
ctx->hash[0] = (v[0] & 0xffff0000) ^ (v[0] << 16) ^ (v[0] >> 16) ^
(v[1] >> 16) ^ (v[1] & 0xffff0000) ^ (v[2] << 16) ^
(v[3] >> 16) ^ (v[4] << 16) ^ (v[5] >> 16) ^ v[5] ^
(v[6] >> 16) ^ (v[7] << 16) ^ (v[7] >> 16) ^ (v[7] & 0xffff);
ctx->hash[1] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^
(v[1] & 0xffff) ^ v[2] ^ (v[2] >> 16) ^ (v[3] << 16) ^
(v[4] >> 16) ^ (v[5] << 16) ^ (v[6] << 16) ^ v[6] ^
(v[7] & 0xffff0000) ^ (v[7] >> 16);
ctx->hash[2] = (v[0] & 0xffff) ^ (v[0] << 16) ^ (v[1] << 16) ^
(v[1] >> 16) ^ (v[1] & 0xffff0000) ^ (v[2] << 16) ^ (v[3] >> 16) ^
v[3] ^ (v[4] << 16) ^ (v[5] >> 16) ^ v[6] ^ (v[6] >> 16) ^
(v[7] & 0xffff) ^ (v[7] << 16) ^ (v[7] >> 16);
ctx->hash[3] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^
(v[1] & 0xffff0000) ^ (v[1] >> 16) ^ (v[2] << 16) ^
(v[2] >> 16) ^ v[2] ^ (v[3] << 16) ^ (v[4] >> 16) ^ v[4] ^
(v[5] << 16) ^ (v[6] << 16) ^ (v[7] & 0xffff) ^ (v[7] >> 16);
ctx->hash[4] =
(v[0] >> 16) ^ (v[1] << 16) ^ v[1] ^ (v[2] >> 16) ^ v[2] ^ (v[3] <<
16) ^
(v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ (v[5] >> 16) ^ v[5] ^ (v[6] <<
16) ^
(v[6] >> 16) ^ (v[7] << 16);
ctx->hash[5] =
(v[0] << 16) ^ (v[0] & 0xffff0000) ^ (v[1] << 16) ^ (v[1] >> 16) ^
(v[1] & 0xffff0000) ^ (v[2] << 16) ^ v[2] ^ (v[3] >> 16) ^ v[3] ^
(v[4] << 16) ^ (v[4] >> 16) ^ v[4] ^ (v[5] << 16) ^ (v[6] << 16) ^
(v[6] >> 16) ^ v[6] ^ (v[7] << 16) ^ (v[7] >> 16) ^ (v[7] &
0xffff0000);
ctx->hash[6] =
v[0] ^ v[2] ^ (v[2] >> 16) ^ v[3] ^ (v[3] << 16) ^ v[4] ^ (v[4] >>
16) ^
(v[5] << 16) ^ (v[5] >> 16) ^ v[5] ^ (v[6] << 16) ^ (v[6] >> 16) ^
v[6] ^ (v[7] << 16) ^ v[7];
ctx->hash[7] =
v[0] ^ (v[0] >> 16) ^ (v[1] << 16) ^ (v[1] >> 16) ^ (v[2] << 16) ^
(v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ v[4] ^ (v[5] >> 16) ^ v[5] ^
(v[6] << 16) ^ (v[6] >> 16) ^ (v[7] << 16) ^ v[7];
}
/**
* This function calculates hash value by 256-bit blocks.
* It updates 256-bit check sum as follows:
* *(uint256_t)(ctx->sum) += *(uint256_t*)block;
* and then updates intermediate hash value ctx->hash
* by calling gost_block_compress().
*
* @param ctx algorithm context
* @param block the 256-bit message block to process
*/
static void
gost_compute_sum_and_hash (struct gosthash94_ctx *ctx, const uint8_t *block)
{