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529 lines
16 KiB
C
529 lines
16 KiB
C
/* des3.c
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*
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* Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
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*
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* This file is part of CyaSSL.
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*
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* CyaSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* CyaSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifndef NO_DES3
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#include <cyassl/ctaocrypt/des3.h>
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#ifdef NO_INLINE
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#include <cyassl/ctaocrypt/misc.h>
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#else
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#include <ctaocrypt/src/misc.c>
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#endif
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/* permuted choice table (key) */
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static const byte pc1[] = {
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57, 49, 41, 33, 25, 17, 9,
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1, 58, 50, 42, 34, 26, 18,
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10, 2, 59, 51, 43, 35, 27,
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19, 11, 3, 60, 52, 44, 36,
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63, 55, 47, 39, 31, 23, 15,
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7, 62, 54, 46, 38, 30, 22,
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14, 6, 61, 53, 45, 37, 29,
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21, 13, 5, 28, 20, 12, 4
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};
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/* number left rotations of pc1 */
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static const byte totrot[] = {
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1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28
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};
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/* permuted choice key (table) */
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static const byte pc2[] = {
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14, 17, 11, 24, 1, 5,
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3, 28, 15, 6, 21, 10,
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23, 19, 12, 4, 26, 8,
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16, 7, 27, 20, 13, 2,
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41, 52, 31, 37, 47, 55,
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30, 40, 51, 45, 33, 48,
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44, 49, 39, 56, 34, 53,
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46, 42, 50, 36, 29, 32
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};
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/* End of DES-defined tables */
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/* bit 0 is left-most in byte */
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static const int bytebit[] = {
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0200,0100,040,020,010,04,02,01
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};
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const word32 Spbox[8][64] = {
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{
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0x01010400,0x00000000,0x00010000,0x01010404,
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0x01010004,0x00010404,0x00000004,0x00010000,
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0x00000400,0x01010400,0x01010404,0x00000400,
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0x01000404,0x01010004,0x01000000,0x00000004,
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0x00000404,0x01000400,0x01000400,0x00010400,
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0x00010400,0x01010000,0x01010000,0x01000404,
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0x00010004,0x01000004,0x01000004,0x00010004,
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0x00000000,0x00000404,0x00010404,0x01000000,
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0x00010000,0x01010404,0x00000004,0x01010000,
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0x01010400,0x01000000,0x01000000,0x00000400,
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0x01010004,0x00010000,0x00010400,0x01000004,
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0x00000400,0x00000004,0x01000404,0x00010404,
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0x01010404,0x00010004,0x01010000,0x01000404,
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0x01000004,0x00000404,0x00010404,0x01010400,
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0x00000404,0x01000400,0x01000400,0x00000000,
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0x00010004,0x00010400,0x00000000,0x01010004},
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{
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0x80108020,0x80008000,0x00008000,0x00108020,
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0x00100000,0x00000020,0x80100020,0x80008020,
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0x80000020,0x80108020,0x80108000,0x80000000,
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0x80008000,0x00100000,0x00000020,0x80100020,
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0x00108000,0x00100020,0x80008020,0x00000000,
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0x80000000,0x00008000,0x00108020,0x80100000,
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0x00100020,0x80000020,0x00000000,0x00108000,
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0x00008020,0x80108000,0x80100000,0x00008020,
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0x00000000,0x00108020,0x80100020,0x00100000,
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0x80008020,0x80100000,0x80108000,0x00008000,
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0x80100000,0x80008000,0x00000020,0x80108020,
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0x00108020,0x00000020,0x00008000,0x80000000,
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0x00008020,0x80108000,0x00100000,0x80000020,
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0x00100020,0x80008020,0x80000020,0x00100020,
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0x00108000,0x00000000,0x80008000,0x00008020,
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0x80000000,0x80100020,0x80108020,0x00108000},
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{
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0x00000208,0x08020200,0x00000000,0x08020008,
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0x08000200,0x00000000,0x00020208,0x08000200,
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0x00020008,0x08000008,0x08000008,0x00020000,
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0x08020208,0x00020008,0x08020000,0x00000208,
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0x08000000,0x00000008,0x08020200,0x00000200,
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0x00020200,0x08020000,0x08020008,0x00020208,
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0x08000208,0x00020200,0x00020000,0x08000208,
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0x00000008,0x08020208,0x00000200,0x08000000,
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0x08020200,0x08000000,0x00020008,0x00000208,
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0x00020000,0x08020200,0x08000200,0x00000000,
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0x00000200,0x00020008,0x08020208,0x08000200,
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0x08000008,0x00000200,0x00000000,0x08020008,
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0x08000208,0x00020000,0x08000000,0x08020208,
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0x00000008,0x00020208,0x00020200,0x08000008,
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0x08020000,0x08000208,0x00000208,0x08020000,
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0x00020208,0x00000008,0x08020008,0x00020200},
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{
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0x00802001,0x00002081,0x00002081,0x00000080,
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0x00802080,0x00800081,0x00800001,0x00002001,
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0x00000000,0x00802000,0x00802000,0x00802081,
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0x00000081,0x00000000,0x00800080,0x00800001,
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0x00000001,0x00002000,0x00800000,0x00802001,
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0x00000080,0x00800000,0x00002001,0x00002080,
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0x00800081,0x00000001,0x00002080,0x00800080,
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0x00002000,0x00802080,0x00802081,0x00000081,
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0x00800080,0x00800001,0x00802000,0x00802081,
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0x00000081,0x00000000,0x00000000,0x00802000,
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0x00002080,0x00800080,0x00800081,0x00000001,
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0x00802001,0x00002081,0x00002081,0x00000080,
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0x00802081,0x00000081,0x00000001,0x00002000,
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0x00800001,0x00002001,0x00802080,0x00800081,
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0x00002001,0x00002080,0x00800000,0x00802001,
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0x00000080,0x00800000,0x00002000,0x00802080},
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{
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0x00000100,0x02080100,0x02080000,0x42000100,
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0x00080000,0x00000100,0x40000000,0x02080000,
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0x40080100,0x00080000,0x02000100,0x40080100,
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0x42000100,0x42080000,0x00080100,0x40000000,
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0x02000000,0x40080000,0x40080000,0x00000000,
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0x40000100,0x42080100,0x42080100,0x02000100,
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0x42080000,0x40000100,0x00000000,0x42000000,
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0x02080100,0x02000000,0x42000000,0x00080100,
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0x00080000,0x42000100,0x00000100,0x02000000,
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0x40000000,0x02080000,0x42000100,0x40080100,
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0x02000100,0x40000000,0x42080000,0x02080100,
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0x40080100,0x00000100,0x02000000,0x42080000,
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0x42080100,0x00080100,0x42000000,0x42080100,
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0x02080000,0x00000000,0x40080000,0x42000000,
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0x00080100,0x02000100,0x40000100,0x00080000,
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0x00000000,0x40080000,0x02080100,0x40000100},
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{
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0x20000010,0x20400000,0x00004000,0x20404010,
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0x20400000,0x00000010,0x20404010,0x00400000,
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0x20004000,0x00404010,0x00400000,0x20000010,
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0x00400010,0x20004000,0x20000000,0x00004010,
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0x00000000,0x00400010,0x20004010,0x00004000,
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0x00404000,0x20004010,0x00000010,0x20400010,
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0x20400010,0x00000000,0x00404010,0x20404000,
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0x00004010,0x00404000,0x20404000,0x20000000,
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0x20004000,0x00000010,0x20400010,0x00404000,
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0x20404010,0x00400000,0x00004010,0x20000010,
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0x00400000,0x20004000,0x20000000,0x00004010,
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0x20000010,0x20404010,0x00404000,0x20400000,
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0x00404010,0x20404000,0x00000000,0x20400010,
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0x00000010,0x00004000,0x20400000,0x00404010,
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0x00004000,0x00400010,0x20004010,0x00000000,
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0x20404000,0x20000000,0x00400010,0x20004010},
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{
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0x00200000,0x04200002,0x04000802,0x00000000,
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0x00000800,0x04000802,0x00200802,0x04200800,
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0x04200802,0x00200000,0x00000000,0x04000002,
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0x00000002,0x04000000,0x04200002,0x00000802,
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0x04000800,0x00200802,0x00200002,0x04000800,
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0x04000002,0x04200000,0x04200800,0x00200002,
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0x04200000,0x00000800,0x00000802,0x04200802,
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0x00200800,0x00000002,0x04000000,0x00200800,
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0x04000000,0x00200800,0x00200000,0x04000802,
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0x04000802,0x04200002,0x04200002,0x00000002,
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0x00200002,0x04000000,0x04000800,0x00200000,
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0x04200800,0x00000802,0x00200802,0x04200800,
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0x00000802,0x04000002,0x04200802,0x04200000,
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0x00200800,0x00000000,0x00000002,0x04200802,
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0x00000000,0x00200802,0x04200000,0x00000800,
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0x04000002,0x04000800,0x00000800,0x00200002},
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{
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0x10001040,0x00001000,0x00040000,0x10041040,
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0x10000000,0x10001040,0x00000040,0x10000000,
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0x00040040,0x10040000,0x10041040,0x00041000,
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0x10041000,0x00041040,0x00001000,0x00000040,
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0x10040000,0x10000040,0x10001000,0x00001040,
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0x00041000,0x00040040,0x10040040,0x10041000,
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0x00001040,0x00000000,0x00000000,0x10040040,
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0x10000040,0x10001000,0x00041040,0x00040000,
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0x00041040,0x00040000,0x10041000,0x00001000,
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0x00000040,0x10040040,0x00001000,0x00041040,
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0x10001000,0x00000040,0x10000040,0x10040000,
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0x10040040,0x10000000,0x00040000,0x10001040,
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0x00000000,0x10041040,0x00040040,0x10000040,
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0x10040000,0x10001000,0x10001040,0x00000000,
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0x10041040,0x00041000,0x00041000,0x00001040,
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0x00001040,0x00040040,0x10000000,0x10041000}
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};
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static INLINE void IPERM(word32* left, word32* right)
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{
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word32 work;
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*right = rotlFixed(*right, 4U);
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work = (*left ^ *right) & 0xf0f0f0f0;
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*left ^= work;
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*right = rotrFixed(*right^work, 20U);
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work = (*left ^ *right) & 0xffff0000;
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*left ^= work;
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*right = rotrFixed(*right^work, 18U);
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work = (*left ^ *right) & 0x33333333;
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*left ^= work;
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*right = rotrFixed(*right^work, 6U);
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work = (*left ^ *right) & 0x00ff00ff;
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*left ^= work;
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*right = rotlFixed(*right^work, 9U);
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work = (*left ^ *right) & 0xaaaaaaaa;
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*left = rotlFixed(*left^work, 1U);
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*right ^= work;
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}
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static INLINE void FPERM(word32* left, word32* right)
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{
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word32 work;
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*right = rotrFixed(*right, 1U);
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work = (*left ^ *right) & 0xaaaaaaaa;
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*right ^= work;
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*left = rotrFixed(*left^work, 9U);
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work = (*left ^ *right) & 0x00ff00ff;
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*right ^= work;
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*left = rotlFixed(*left^work, 6U);
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work = (*left ^ *right) & 0x33333333;
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*right ^= work;
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*left = rotlFixed(*left^work, 18U);
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work = (*left ^ *right) & 0xffff0000;
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*right ^= work;
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*left = rotlFixed(*left^work, 20U);
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work = (*left ^ *right) & 0xf0f0f0f0;
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*right ^= work;
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*left = rotrFixed(*left^work, 4U);
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}
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static void DesSetKey(const byte* key, int dir, word32* out)
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{
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byte buffer[56+56+8];
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byte *const pc1m = buffer; /* place to modify pc1 into */
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byte *const pcr = pc1m + 56; /* place to rotate pc1 into */
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byte *const ks = pcr + 56;
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register int i,j,l;
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int m;
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for (j = 0; j < 56; j++) { /* convert pc1 to bits of key */
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l = pc1[j] - 1; /* integer bit location */
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m = l & 07; /* find bit */
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pc1m[j] = (key[l >> 3] & /* find which key byte l is in */
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bytebit[m]) /* and which bit of that byte */
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? 1 : 0; /* and store 1-bit result */
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}
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for (i = 0; i < 16; i++) { /* key chunk for each iteration */
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XMEMSET(ks, 0, 8); /* Clear key schedule */
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for (j = 0; j < 56; j++) /* rotate pc1 the right amount */
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pcr[j] = pc1m[(l = j + totrot[i]) < (j < 28 ? 28 : 56) ? l: l-28];
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/* rotate left and right halves independently */
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for (j = 0; j < 48; j++){ /* select bits individually */
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/* check bit that goes to ks[j] */
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if (pcr[pc2[j] - 1]){
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/* mask it in if it's there */
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l= j % 6;
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ks[j/6] |= bytebit[l] >> 2;
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}
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}
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/* Now convert to odd/even interleaved form for use in F */
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out[2*i] = ((word32)ks[0] << 24)
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| ((word32)ks[2] << 16)
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| ((word32)ks[4] << 8)
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| ((word32)ks[6]);
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out[2*i + 1] = ((word32)ks[1] << 24)
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| ((word32)ks[3] << 16)
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| ((word32)ks[5] << 8)
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| ((word32)ks[7]);
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}
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/* reverse key schedule order */
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if (dir == DES_DECRYPTION)
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for (i = 0; i < 16; i += 2) {
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word32 swap = out[i];
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out[i] = out[DES_KS_SIZE - 2 - i];
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out[DES_KS_SIZE - 2 - i] = swap;
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swap = out[i + 1];
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out[i + 1] = out[DES_KS_SIZE - 1 - i];
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out[DES_KS_SIZE - 1 - i] = swap;
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}
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}
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static INLINE int Reverse(int dir)
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{
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return !dir;
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}
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void Des_SetIV(Des* des, const byte* iv)
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{
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if (des && iv)
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XMEMCPY(des->reg, iv, DES_BLOCK_SIZE);
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}
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void Des3_SetIV(Des3* des, const byte* iv)
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{
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if (des && iv)
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XMEMCPY(des->reg, iv, DES_BLOCK_SIZE);
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}
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void Des_SetKey(Des* des, const byte* key, const byte* iv, int dir)
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{
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DesSetKey(key, dir, des->key);
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Des_SetIV(des, iv);
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}
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void Des3_SetKey(Des3* des, const byte* key, const byte* iv, int dir)
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{
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DesSetKey(key + (dir == DES_ENCRYPTION ? 0 : 16), dir, des->key[0]);
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DesSetKey(key + 8, Reverse(dir), des->key[1]);
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DesSetKey(key + (dir == DES_DECRYPTION ? 0 : 16), dir, des->key[2]);
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Des3_SetIV(des, iv);
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}
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static void DesRawProcessBlock(word32* lIn, word32* rIn, const word32* kptr)
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{
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word32 l = *lIn, r = *rIn, i;
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for (i=0; i<8; i++)
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{
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word32 work = rotrFixed(r, 4U) ^ kptr[4*i+0];
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l ^= Spbox[6][(work) & 0x3f]
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^ Spbox[4][(work >> 8) & 0x3f]
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^ Spbox[2][(work >> 16) & 0x3f]
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^ Spbox[0][(work >> 24) & 0x3f];
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work = r ^ kptr[4*i+1];
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l ^= Spbox[7][(work) & 0x3f]
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^ Spbox[5][(work >> 8) & 0x3f]
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^ Spbox[3][(work >> 16) & 0x3f]
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^ Spbox[1][(work >> 24) & 0x3f];
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work = rotrFixed(l, 4U) ^ kptr[4*i+2];
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r ^= Spbox[6][(work) & 0x3f]
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^ Spbox[4][(work >> 8) & 0x3f]
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^ Spbox[2][(work >> 16) & 0x3f]
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^ Spbox[0][(work >> 24) & 0x3f];
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work = l ^ kptr[4*i+3];
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r ^= Spbox[7][(work) & 0x3f]
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^ Spbox[5][(work >> 8) & 0x3f]
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^ Spbox[3][(work >> 16) & 0x3f]
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^ Spbox[1][(work >> 24) & 0x3f];
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}
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*lIn = l; *rIn = r;
|
|
}
|
|
|
|
|
|
static void DesProcessBlock(Des* des, const byte* in, byte* out)
|
|
{
|
|
word32 l, r;
|
|
|
|
XMEMCPY(&l, in, sizeof(l));
|
|
XMEMCPY(&r, in + sizeof(l), sizeof(r));
|
|
#ifdef LITTLE_ENDIAN_ORDER
|
|
l = ByteReverseWord32(l);
|
|
r = ByteReverseWord32(r);
|
|
#endif
|
|
IPERM(&l,&r);
|
|
|
|
DesRawProcessBlock(&l, &r, des->key);
|
|
|
|
FPERM(&l,&r);
|
|
#ifdef LITTLE_ENDIAN_ORDER
|
|
l = ByteReverseWord32(l);
|
|
r = ByteReverseWord32(r);
|
|
#endif
|
|
XMEMCPY(out, &r, sizeof(r));
|
|
XMEMCPY(out + sizeof(r), &l, sizeof(l));
|
|
}
|
|
|
|
|
|
static void Des3ProcessBlock(Des3* des, const byte* in, byte* out)
|
|
{
|
|
word32 l, r;
|
|
|
|
XMEMCPY(&l, in, sizeof(l));
|
|
XMEMCPY(&r, in + sizeof(l), sizeof(r));
|
|
#ifdef LITTLE_ENDIAN_ORDER
|
|
l = ByteReverseWord32(l);
|
|
r = ByteReverseWord32(r);
|
|
#endif
|
|
IPERM(&l,&r);
|
|
|
|
DesRawProcessBlock(&l, &r, des->key[0]);
|
|
DesRawProcessBlock(&r, &l, des->key[1]);
|
|
DesRawProcessBlock(&l, &r, des->key[2]);
|
|
|
|
FPERM(&l,&r);
|
|
#ifdef LITTLE_ENDIAN_ORDER
|
|
l = ByteReverseWord32(l);
|
|
r = ByteReverseWord32(r);
|
|
#endif
|
|
XMEMCPY(out, &r, sizeof(r));
|
|
XMEMCPY(out + sizeof(r), &l, sizeof(l));
|
|
}
|
|
|
|
|
|
void Des_CbcEncrypt(Des* des, byte* out, const byte* in, word32 sz)
|
|
{
|
|
word32 blocks = sz / DES_BLOCK_SIZE;
|
|
|
|
while (blocks--) {
|
|
xorbuf((byte*)des->reg, in, DES_BLOCK_SIZE);
|
|
DesProcessBlock(des, (byte*)des->reg, (byte*)des->reg);
|
|
XMEMCPY(out, des->reg, DES_BLOCK_SIZE);
|
|
|
|
out += DES_BLOCK_SIZE;
|
|
in += DES_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
|
|
void Des_CbcDecrypt(Des* des, byte* out, const byte* in, word32 sz)
|
|
{
|
|
word32 blocks = sz / DES_BLOCK_SIZE;
|
|
byte hold[16];
|
|
|
|
while (blocks--) {
|
|
XMEMCPY(des->tmp, in, DES_BLOCK_SIZE);
|
|
DesProcessBlock(des, (byte*)des->tmp, out);
|
|
xorbuf(out, (byte*)des->reg, DES_BLOCK_SIZE);
|
|
|
|
XMEMCPY(hold, des->reg, DES_BLOCK_SIZE);
|
|
XMEMCPY(des->reg, des->tmp, DES_BLOCK_SIZE);
|
|
XMEMCPY(des->tmp, hold, DES_BLOCK_SIZE);
|
|
|
|
out += DES_BLOCK_SIZE;
|
|
in += DES_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
|
|
void Des3_CbcEncrypt(Des3* des, byte* out, const byte* in, word32 sz)
|
|
{
|
|
word32 blocks = sz / DES_BLOCK_SIZE;
|
|
|
|
while (blocks--) {
|
|
xorbuf((byte*)des->reg, in, DES_BLOCK_SIZE);
|
|
Des3ProcessBlock(des, (byte*)des->reg, (byte*)des->reg);
|
|
XMEMCPY(out, des->reg, DES_BLOCK_SIZE);
|
|
|
|
out += DES_BLOCK_SIZE;
|
|
in += DES_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
|
|
void Des3_CbcDecrypt(Des3* des, byte* out, const byte* in, word32 sz)
|
|
{
|
|
word32 blocks = sz / DES_BLOCK_SIZE;
|
|
|
|
while (blocks--) {
|
|
XMEMCPY(des->tmp, in, DES_BLOCK_SIZE);
|
|
Des3ProcessBlock(des, (byte*)des->tmp, out);
|
|
xorbuf(out, (byte*)des->reg, DES_BLOCK_SIZE);
|
|
XMEMCPY(des->reg, des->tmp, DES_BLOCK_SIZE);
|
|
|
|
out += DES_BLOCK_SIZE;
|
|
in += DES_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
#ifdef CYASSL_DES_ECB
|
|
|
|
/* One block, compatibility only */
|
|
void Des_EcbEncrypt(Des* des, byte* out, const byte* in, word32 sz)
|
|
{
|
|
word32 blocks = sz / DES_BLOCK_SIZE;
|
|
|
|
while (blocks--) {
|
|
DesProcessBlock(des, in, out);
|
|
|
|
out += DES_BLOCK_SIZE;
|
|
in += DES_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
#endif /* CYASSL_DES_ECB */
|
|
|
|
|
|
#endif /* NO_DES3 */
|