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Diffstat (limited to 'polarssl/src/library/des.c')
| -rw-r--r-- | polarssl/src/library/des.c | 993 |
1 files changed, 0 insertions, 993 deletions
diff --git a/polarssl/src/library/des.c b/polarssl/src/library/des.c deleted file mode 100644 index b40baf8..0000000 --- a/polarssl/src/library/des.c +++ /dev/null @@ -1,993 +0,0 @@ -/* - * FIPS-46-3 compliant Triple-DES implementation - * - * Copyright (C) 2006-2010, Brainspark B.V. - * - * This file is part of PolarSSL (http://www.polarssl.org) - * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> - * - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ -/* - * DES, on which TDES is based, was originally designed by Horst Feistel - * at IBM in 1974, and was adopted as a standard by NIST (formerly NBS). - * - * http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf - */ - -#include "polarssl/config.h" - -#if defined(POLARSSL_DES_C) - -#include "polarssl/des.h" - -/* - * 32-bit integer manipulation macros (big endian) - */ -#ifndef GET_ULONG_BE -#define GET_ULONG_BE(n,b,i) \ -{ \ - (n) = ( (unsigned long) (b)[(i) ] << 24 ) \ - | ( (unsigned long) (b)[(i) + 1] << 16 ) \ - | ( (unsigned long) (b)[(i) + 2] << 8 ) \ - | ( (unsigned long) (b)[(i) + 3] ); \ -} -#endif - -#ifndef PUT_ULONG_BE -#define PUT_ULONG_BE(n,b,i) \ -{ \ - (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ - (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ - (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ - (b)[(i) + 3] = (unsigned char) ( (n) ); \ -} -#endif - -/* - * Expanded DES S-boxes - */ -static const unsigned long SB1[64] = -{ - 0x01010400, 0x00000000, 0x00010000, 0x01010404, - 0x01010004, 0x00010404, 0x00000004, 0x00010000, - 0x00000400, 0x01010400, 0x01010404, 0x00000400, - 0x01000404, 0x01010004, 0x01000000, 0x00000004, - 0x00000404, 0x01000400, 0x01000400, 0x00010400, - 0x00010400, 0x01010000, 0x01010000, 0x01000404, - 0x00010004, 0x01000004, 0x01000004, 0x00010004, - 0x00000000, 0x00000404, 0x00010404, 0x01000000, - 0x00010000, 0x01010404, 0x00000004, 0x01010000, - 0x01010400, 0x01000000, 0x01000000, 0x00000400, - 0x01010004, 0x00010000, 0x00010400, 0x01000004, - 0x00000400, 0x00000004, 0x01000404, 0x00010404, - 0x01010404, 0x00010004, 0x01010000, 0x01000404, - 0x01000004, 0x00000404, 0x00010404, 0x01010400, - 0x00000404, 0x01000400, 0x01000400, 0x00000000, - 0x00010004, 0x00010400, 0x00000000, 0x01010004 -}; - -static const unsigned long SB2[64] = -{ - 0x80108020, 0x80008000, 0x00008000, 0x00108020, - 0x00100000, 0x00000020, 0x80100020, 0x80008020, - 0x80000020, 0x80108020, 0x80108000, 0x80000000, - 0x80008000, 0x00100000, 0x00000020, 0x80100020, - 0x00108000, 0x00100020, 0x80008020, 0x00000000, - 0x80000000, 0x00008000, 0x00108020, 0x80100000, - 0x00100020, 0x80000020, 0x00000000, 0x00108000, - 0x00008020, 0x80108000, 0x80100000, 0x00008020, - 0x00000000, 0x00108020, 0x80100020, 0x00100000, - 0x80008020, 0x80100000, 0x80108000, 0x00008000, - 0x80100000, 0x80008000, 0x00000020, 0x80108020, - 0x00108020, 0x00000020, 0x00008000, 0x80000000, - 0x00008020, 0x80108000, 0x00100000, 0x80000020, - 0x00100020, 0x80008020, 0x80000020, 0x00100020, - 0x00108000, 0x00000000, 0x80008000, 0x00008020, - 0x80000000, 0x80100020, 0x80108020, 0x00108000 -}; - -static const unsigned long SB3[64] = -{ - 0x00000208, 0x08020200, 0x00000000, 0x08020008, - 0x08000200, 0x00000000, 0x00020208, 0x08000200, - 0x00020008, 0x08000008, 0x08000008, 0x00020000, - 0x08020208, 0x00020008, 0x08020000, 0x00000208, - 0x08000000, 0x00000008, 0x08020200, 0x00000200, - 0x00020200, 0x08020000, 0x08020008, 0x00020208, - 0x08000208, 0x00020200, 0x00020000, 0x08000208, - 0x00000008, 0x08020208, 0x00000200, 0x08000000, - 0x08020200, 0x08000000, 0x00020008, 0x00000208, - 0x00020000, 0x08020200, 0x08000200, 0x00000000, - 0x00000200, 0x00020008, 0x08020208, 0x08000200, - 0x08000008, 0x00000200, 0x00000000, 0x08020008, - 0x08000208, 0x00020000, 0x08000000, 0x08020208, - 0x00000008, 0x00020208, 0x00020200, 0x08000008, - 0x08020000, 0x08000208, 0x00000208, 0x08020000, - 0x00020208, 0x00000008, 0x08020008, 0x00020200 -}; - -static const unsigned long SB4[64] = -{ - 0x00802001, 0x00002081, 0x00002081, 0x00000080, - 0x00802080, 0x00800081, 0x00800001, 0x00002001, - 0x00000000, 0x00802000, 0x00802000, 0x00802081, - 0x00000081, 0x00000000, 0x00800080, 0x00800001, - 0x00000001, 0x00002000, 0x00800000, 0x00802001, - 0x00000080, 0x00800000, 0x00002001, 0x00002080, - 0x00800081, 0x00000001, 0x00002080, 0x00800080, - 0x00002000, 0x00802080, 0x00802081, 0x00000081, - 0x00800080, 0x00800001, 0x00802000, 0x00802081, - 0x00000081, 0x00000000, 0x00000000, 0x00802000, - 0x00002080, 0x00800080, 0x00800081, 0x00000001, - 0x00802001, 0x00002081, 0x00002081, 0x00000080, - 0x00802081, 0x00000081, 0x00000001, 0x00002000, - 0x00800001, 0x00002001, 0x00802080, 0x00800081, - 0x00002001, 0x00002080, 0x00800000, 0x00802001, - 0x00000080, 0x00800000, 0x00002000, 0x00802080 -}; - -static const unsigned long SB5[64] = -{ - 0x00000100, 0x02080100, 0x02080000, 0x42000100, - 0x00080000, 0x00000100, 0x40000000, 0x02080000, - 0x40080100, 0x00080000, 0x02000100, 0x40080100, - 0x42000100, 0x42080000, 0x00080100, 0x40000000, - 0x02000000, 0x40080000, 0x40080000, 0x00000000, - 0x40000100, 0x42080100, 0x42080100, 0x02000100, - 0x42080000, 0x40000100, 0x00000000, 0x42000000, - 0x02080100, 0x02000000, 0x42000000, 0x00080100, - 0x00080000, 0x42000100, 0x00000100, 0x02000000, - 0x40000000, 0x02080000, 0x42000100, 0x40080100, - 0x02000100, 0x40000000, 0x42080000, 0x02080100, - 0x40080100, 0x00000100, 0x02000000, 0x42080000, - 0x42080100, 0x00080100, 0x42000000, 0x42080100, - 0x02080000, 0x00000000, 0x40080000, 0x42000000, - 0x00080100, 0x02000100, 0x40000100, 0x00080000, - 0x00000000, 0x40080000, 0x02080100, 0x40000100 -}; - -static const unsigned long SB6[64] = -{ - 0x20000010, 0x20400000, 0x00004000, 0x20404010, - 0x20400000, 0x00000010, 0x20404010, 0x00400000, - 0x20004000, 0x00404010, 0x00400000, 0x20000010, - 0x00400010, 0x20004000, 0x20000000, 0x00004010, - 0x00000000, 0x00400010, 0x20004010, 0x00004000, - 0x00404000, 0x20004010, 0x00000010, 0x20400010, - 0x20400010, 0x00000000, 0x00404010, 0x20404000, - 0x00004010, 0x00404000, 0x20404000, 0x20000000, - 0x20004000, 0x00000010, 0x20400010, 0x00404000, - 0x20404010, 0x00400000, 0x00004010, 0x20000010, - 0x00400000, 0x20004000, 0x20000000, 0x00004010, - 0x20000010, 0x20404010, 0x00404000, 0x20400000, - 0x00404010, 0x20404000, 0x00000000, 0x20400010, - 0x00000010, 0x00004000, 0x20400000, 0x00404010, - 0x00004000, 0x00400010, 0x20004010, 0x00000000, - 0x20404000, 0x20000000, 0x00400010, 0x20004010 -}; - -static const unsigned long SB7[64] = -{ - 0x00200000, 0x04200002, 0x04000802, 0x00000000, - 0x00000800, 0x04000802, 0x00200802, 0x04200800, - 0x04200802, 0x00200000, 0x00000000, 0x04000002, - 0x00000002, 0x04000000, 0x04200002, 0x00000802, - 0x04000800, 0x00200802, 0x00200002, 0x04000800, - 0x04000002, 0x04200000, 0x04200800, 0x00200002, - 0x04200000, 0x00000800, 0x00000802, 0x04200802, - 0x00200800, 0x00000002, 0x04000000, 0x00200800, - 0x04000000, 0x00200800, 0x00200000, 0x04000802, - 0x04000802, 0x04200002, 0x04200002, 0x00000002, - 0x00200002, 0x04000000, 0x04000800, 0x00200000, - 0x04200800, 0x00000802, 0x00200802, 0x04200800, - 0x00000802, 0x04000002, 0x04200802, 0x04200000, - 0x00200800, 0x00000000, 0x00000002, 0x04200802, - 0x00000000, 0x00200802, 0x04200000, 0x00000800, - 0x04000002, 0x04000800, 0x00000800, 0x00200002 -}; - -static const unsigned long SB8[64] = -{ - 0x10001040, 0x00001000, 0x00040000, 0x10041040, - 0x10000000, 0x10001040, 0x00000040, 0x10000000, - 0x00040040, 0x10040000, 0x10041040, 0x00041000, - 0x10041000, 0x00041040, 0x00001000, 0x00000040, - 0x10040000, 0x10000040, 0x10001000, 0x00001040, - 0x00041000, 0x00040040, 0x10040040, 0x10041000, - 0x00001040, 0x00000000, 0x00000000, 0x10040040, - 0x10000040, 0x10001000, 0x00041040, 0x00040000, - 0x00041040, 0x00040000, 0x10041000, 0x00001000, - 0x00000040, 0x10040040, 0x00001000, 0x00041040, - 0x10001000, 0x00000040, 0x10000040, 0x10040000, - 0x10040040, 0x10000000, 0x00040000, 0x10001040, - 0x00000000, 0x10041040, 0x00040040, 0x10000040, - 0x10040000, 0x10001000, 0x10001040, 0x00000000, - 0x10041040, 0x00041000, 0x00041000, 0x00001040, - 0x00001040, 0x00040040, 0x10000000, 0x10041000 -}; - -/* - * PC1: left and right halves bit-swap - */ -static const unsigned long LHs[16] = -{ - 0x00000000, 0x00000001, 0x00000100, 0x00000101, - 0x00010000, 0x00010001, 0x00010100, 0x00010101, - 0x01000000, 0x01000001, 0x01000100, 0x01000101, - 0x01010000, 0x01010001, 0x01010100, 0x01010101 -}; - -static const unsigned long RHs[16] = -{ - 0x00000000, 0x01000000, 0x00010000, 0x01010000, - 0x00000100, 0x01000100, 0x00010100, 0x01010100, - 0x00000001, 0x01000001, 0x00010001, 0x01010001, - 0x00000101, 0x01000101, 0x00010101, 0x01010101, -}; - -/* - * Initial Permutation macro - */ -#define DES_IP(X,Y) \ -{ \ - T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \ - T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \ - T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \ - T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \ - Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF; \ - T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T; \ - X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF; \ -} - -/* - * Final Permutation macro - */ -#define DES_FP(X,Y) \ -{ \ - X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF; \ - T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T; \ - Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF; \ - T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \ - T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \ - T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \ - T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \ -} - -/* - * DES round macro - */ -#define DES_ROUND(X,Y) \ -{ \ - T = *SK++ ^ X; \ - Y ^= SB8[ (T ) & 0x3F ] ^ \ - SB6[ (T >> 8) & 0x3F ] ^ \ - SB4[ (T >> 16) & 0x3F ] ^ \ - SB2[ (T >> 24) & 0x3F ]; \ - \ - T = *SK++ ^ ((X << 28) | (X >> 4)); \ - Y ^= SB7[ (T ) & 0x3F ] ^ \ - SB5[ (T >> 8) & 0x3F ] ^ \ - SB3[ (T >> 16) & 0x3F ] ^ \ - SB1[ (T >> 24) & 0x3F ]; \ -} - -#define SWAP(a,b) { unsigned long t = a; a = b; b = t; t = 0; } - -static const unsigned char odd_parity_table[128] = { 1, 2, 4, 7, 8, - 11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32, 35, 37, 38, 41, 42, 44, - 47, 49, 50, 52, 55, 56, 59, 61, 62, 64, 67, 69, 70, 73, 74, 76, 79, 81, - 82, 84, 87, 88, 91, 93, 94, 97, 98, 100, 103, 104, 107, 109, 110, 112, - 115, 117, 118, 121, 122, 124, 127, 128, 131, 133, 134, 137, 138, 140, - 143, 145, 146, 148, 151, 152, 155, 157, 158, 161, 162, 164, 167, 168, - 171, 173, 174, 176, 179, 181, 182, 185, 186, 188, 191, 193, 194, 196, - 199, 200, 203, 205, 206, 208, 211, 213, 214, 217, 218, 220, 223, 224, - 227, 229, 230, 233, 234, 236, 239, 241, 242, 244, 247, 248, 251, 253, - 254 }; - -void des_key_set_parity( unsigned char key[DES_KEY_SIZE] ) -{ - int i; - - for( i = 0; i < DES_KEY_SIZE; i++ ) - key[i] = odd_parity_table[key[i] / 2]; -} - -/* - * Check the given key's parity, returns 1 on failure, 0 on SUCCESS - */ -int des_key_check_key_parity( const unsigned char key[DES_KEY_SIZE] ) -{ - int i; - - for( i = 0; i < DES_KEY_SIZE; i++ ) - if ( key[i] != odd_parity_table[key[i] / 2] ) - return( 1 ); - - return( 0 ); -} - -/* - * Table of weak and semi-weak keys - * - * Source: http://en.wikipedia.org/wiki/Weak_key - * - * Weak: - * Alternating ones + zeros (0x0101010101010101) - * Alternating 'F' + 'E' (0xFEFEFEFEFEFEFEFE) - * '0xE0E0E0E0F1F1F1F1' - * '0x1F1F1F1F0E0E0E0E' - * - * Semi-weak: - * 0x011F011F010E010E and 0x1F011F010E010E01 - * 0x01E001E001F101F1 and 0xE001E001F101F101 - * 0x01FE01FE01FE01FE and 0xFE01FE01FE01FE01 - * 0x1FE01FE00EF10EF1 and 0xE01FE01FF10EF10E - * 0x1FFE1FFE0EFE0EFE and 0xFE1FFE1FFE0EFE0E - * 0xE0FEE0FEF1FEF1FE and 0xFEE0FEE0FEF1FEF1 - * - */ - -#define WEAK_KEY_COUNT 16 - -static const unsigned char weak_key_table[WEAK_KEY_COUNT][DES_KEY_SIZE] = -{ - { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }, - { 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE }, - { 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E }, - { 0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1 }, - - { 0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E }, - { 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01 }, - { 0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1 }, - { 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01 }, - { 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE }, - { 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01 }, - { 0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1 }, - { 0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E }, - { 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE }, - { 0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E }, - { 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE }, - { 0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1 } -}; - -int des_key_check_weak( const unsigned char key[DES_KEY_SIZE] ) -{ - int i; - - for( i = 0; i < WEAK_KEY_COUNT; i++ ) - if( memcmp( weak_key_table[i], key, DES_KEY_SIZE) == 0) - return( 1 ); - - return( 0 ); -} - -static void des_setkey( unsigned long SK[32], const unsigned char key[DES_KEY_SIZE] ) -{ - int i; - unsigned long X, Y, T; - - GET_ULONG_BE( X, key, 0 ); - GET_ULONG_BE( Y, key, 4 ); - - /* - * Permuted Choice 1 - */ - T = ((Y >> 4) ^ X) & 0x0F0F0F0F; X ^= T; Y ^= (T << 4); - T = ((Y ) ^ X) & 0x10101010; X ^= T; Y ^= (T ); - - X = (LHs[ (X ) & 0xF] << 3) | (LHs[ (X >> 8) & 0xF ] << 2) - | (LHs[ (X >> 16) & 0xF] << 1) | (LHs[ (X >> 24) & 0xF ] ) - | (LHs[ (X >> 5) & 0xF] << 7) | (LHs[ (X >> 13) & 0xF ] << 6) - | (LHs[ (X >> 21) & 0xF] << 5) | (LHs[ (X >> 29) & 0xF ] << 4); - - Y = (RHs[ (Y >> 1) & 0xF] << 3) | (RHs[ (Y >> 9) & 0xF ] << 2) - | (RHs[ (Y >> 17) & 0xF] << 1) | (RHs[ (Y >> 25) & 0xF ] ) - | (RHs[ (Y >> 4) & 0xF] << 7) | (RHs[ (Y >> 12) & 0xF ] << 6) - | (RHs[ (Y >> 20) & 0xF] << 5) | (RHs[ (Y >> 28) & 0xF ] << 4); - - X &= 0x0FFFFFFF; - Y &= 0x0FFFFFFF; - - /* - * calculate subkeys - */ - for( i = 0; i < 16; i++ ) - { - if( i < 2 || i == 8 || i == 15 ) - { - X = ((X << 1) | (X >> 27)) & 0x0FFFFFFF; - Y = ((Y << 1) | (Y >> 27)) & 0x0FFFFFFF; - } - else - { - X = ((X << 2) | (X >> 26)) & 0x0FFFFFFF; - Y = ((Y << 2) | (Y >> 26)) & 0x0FFFFFFF; - } - - *SK++ = ((X << 4) & 0x24000000) | ((X << 28) & 0x10000000) - | ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000) - | ((X << 6) & 0x01000000) | ((X << 9) & 0x00200000) - | ((X >> 1) & 0x00100000) | ((X << 10) & 0x00040000) - | ((X << 2) & 0x00020000) | ((X >> 10) & 0x00010000) - | ((Y >> 13) & 0x00002000) | ((Y >> 4) & 0x00001000) - | ((Y << 6) & 0x00000800) | ((Y >> 1) & 0x00000400) - | ((Y >> 14) & 0x00000200) | ((Y ) & 0x00000100) - | ((Y >> 5) & 0x00000020) | ((Y >> 10) & 0x00000010) - | ((Y >> 3) & 0x00000008) | ((Y >> 18) & 0x00000004) - | ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001); - - *SK++ = ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000) - | ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000) - | ((X >> 2) & 0x02000000) | ((X << 1) & 0x01000000) - | ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000) - | ((X << 3) & 0x00080000) | ((X >> 6) & 0x00040000) - | ((X << 15) & 0x00020000) | ((X >> 4) & 0x00010000) - | ((Y >> 2) & 0x00002000) | ((Y << 8) & 0x00001000) - | ((Y >> 14) & 0x00000808) | ((Y >> 9) & 0x00000400) - | ((Y ) & 0x00000200) | ((Y << 7) & 0x00000100) - | ((Y >> 7) & 0x00000020) | ((Y >> 3) & 0x00000011) - | ((Y << 2) & 0x00000004) | ((Y >> 21) & 0x00000002); - } -} - -/* - * DES key schedule (56-bit, encryption) - */ -int des_setkey_enc( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ) -{ - des_setkey( ctx->sk, key ); - - return( 0 ); -} - -/* - * DES key schedule (56-bit, decryption) - */ -int des_setkey_dec( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ) -{ - int i; - - des_setkey( ctx->sk, key ); - - for( i = 0; i < 16; i += 2 ) - { - SWAP( ctx->sk[i ], ctx->sk[30 - i] ); - SWAP( ctx->sk[i + 1], ctx->sk[31 - i] ); - } - - return( 0 ); -} - -static void des3_set2key( unsigned long esk[96], - unsigned long dsk[96], - const unsigned char key[DES_KEY_SIZE*2] ) -{ - int i; - - des_setkey( esk, key ); - des_setkey( dsk + 32, key + 8 ); - - for( i = 0; i < 32; i += 2 ) - { - dsk[i ] = esk[30 - i]; - dsk[i + 1] = esk[31 - i]; - - esk[i + 32] = dsk[62 - i]; - esk[i + 33] = dsk[63 - i]; - - esk[i + 64] = esk[i ]; - esk[i + 65] = esk[i + 1]; - - dsk[i + 64] = dsk[i ]; - dsk[i + 65] = dsk[i + 1]; - } -} - -/* - * Triple-DES key schedule (112-bit, encryption) - */ -int des3_set2key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ) -{ - unsigned long sk[96]; - - des3_set2key( ctx->sk, sk, key ); - memset( sk, 0, sizeof( sk ) ); - - return( 0 ); -} - -/* - * Triple-DES key schedule (112-bit, decryption) - */ -int des3_set2key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ) -{ - unsigned long sk[96]; - - des3_set2key( sk, ctx->sk, key ); - memset( sk, 0, sizeof( sk ) ); - - return( 0 ); -} - -static void des3_set3key( unsigned long esk[96], - unsigned long dsk[96], - const unsigned char key[24] ) -{ - int i; - - des_setkey( esk, key ); - des_setkey( dsk + 32, key + 8 ); - des_setkey( esk + 64, key + 16 ); - - for( i = 0; i < 32; i += 2 ) - { - dsk[i ] = esk[94 - i]; - dsk[i + 1] = esk[95 - i]; - - esk[i + 32] = dsk[62 - i]; - esk[i + 33] = dsk[63 - i]; - - dsk[i + 64] = esk[30 - i]; - dsk[i + 65] = esk[31 - i]; - } -} - -/* - * Triple-DES key schedule (168-bit, encryption) - */ -int des3_set3key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ) -{ - unsigned long sk[96]; - - des3_set3key( ctx->sk, sk, key ); - memset( sk, 0, sizeof( sk ) ); - - return( 0 ); -} - -/* - * Triple-DES key schedule (168-bit, decryption) - */ -int des3_set3key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ) -{ - unsigned long sk[96]; - - des3_set3key( sk, ctx->sk, key ); - memset( sk, 0, sizeof( sk ) ); - - return( 0 ); -} - -/* - * DES-ECB block encryption/decryption - */ -int des_crypt_ecb( des_context *ctx, - const unsigned char input[8], - unsigned char output[8] ) -{ - int i; - unsigned long X, Y, T, *SK; - - SK = ctx->sk; - - GET_ULONG_BE( X, input, 0 ); - GET_ULONG_BE( Y, input, 4 ); - - DES_IP( X, Y ); - - for( i = 0; i < 8; i++ ) - { - DES_ROUND( Y, X ); - DES_ROUND( X, Y ); - } - - DES_FP( Y, X ); - - PUT_ULONG_BE( Y, output, 0 ); - PUT_ULONG_BE( X, output, 4 ); - - return( 0 ); -} - -/* - * DES-CBC buffer encryption/decryption - */ -int des_crypt_cbc( des_context *ctx, - int mode, - size_t length, - unsigned char iv[8], - const unsigned char *input, - unsigned char *output ) -{ - int i; - unsigned char temp[8]; - - if( length % 8 ) - return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH ); - - if( mode == DES_ENCRYPT ) - { - while( length > 0 ) - { - for( i = 0; i < 8; i++ ) - output[i] = (unsigned char)( input[i] ^ iv[i] ); - - des_crypt_ecb( ctx, output, output ); - memcpy( iv, output, 8 ); - - input += 8; - output += 8; - length -= 8; - } - } - else /* DES_DECRYPT */ - { - while( length > 0 ) - { - memcpy( temp, input, 8 ); - des_crypt_ecb( ctx, input, output ); - - for( i = 0; i < 8; i++ ) - output[i] = (unsigned char)( output[i] ^ iv[i] ); - - memcpy( iv, temp, 8 ); - - input += 8; - output += 8; - length -= 8; - } - } - - return( 0 ); -} - -/* - * 3DES-ECB block encryption/decryption - */ -int des3_crypt_ecb( des3_context *ctx, - const unsigned char input[8], - unsigned char output[8] ) -{ - int i; - unsigned long X, Y, T, *SK; - - SK = ctx->sk; - - GET_ULONG_BE( X, input, 0 ); - GET_ULONG_BE( Y, input, 4 ); - - DES_IP( X, Y ); - - for( i = 0; i < 8; i++ ) - { - DES_ROUND( Y, X ); - DES_ROUND( X, Y ); - } - - for( i = 0; i < 8; i++ ) - { - DES_ROUND( X, Y ); - DES_ROUND( Y, X ); - } - - for( i = 0; i < 8; i++ ) - { - DES_ROUND( Y, X ); - DES_ROUND( X, Y ); - } - - DES_FP( Y, X ); - - PUT_ULONG_BE( Y, output, 0 ); - PUT_ULONG_BE( X, output, 4 ); - - return( 0 ); -} - -/* - * 3DES-CBC buffer encryption/decryption - */ -int des3_crypt_cbc( des3_context *ctx, - int mode, - size_t length, - unsigned char iv[8], - const unsigned char *input, - unsigned char *output ) -{ - int i; - unsigned char temp[8]; - - if( length % 8 ) - return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH ); - - if( mode == DES_ENCRYPT ) - { - while( length > 0 ) - { - for( i = 0; i < 8; i++ ) - output[i] = (unsigned char)( input[i] ^ iv[i] ); - - des3_crypt_ecb( ctx, output, output ); - memcpy( iv, output, 8 ); - - input += 8; - output += 8; - length -= 8; - } - } - else /* DES_DECRYPT */ - { - while( length > 0 ) - { - memcpy( temp, input, 8 ); - des3_crypt_ecb( ctx, input, output ); - - for( i = 0; i < 8; i++ ) - output[i] = (unsigned char)( output[i] ^ iv[i] ); - - memcpy( iv, temp, 8 ); - - input += 8; - output += 8; - length -= 8; - } - } - - return( 0 ); -} - -#if defined(POLARSSL_SELF_TEST) - -#include <stdio.h> - -/* - * DES and 3DES test vectors from: - * - * http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip - */ -static const unsigned char des3_test_keys[24] = -{ - 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, - 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, - 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23 -}; - -static const unsigned char des3_test_iv[8] = -{ - 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, -}; - -static const unsigned char des3_test_buf[8] = -{ - 0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74 -}; - -static const unsigned char des3_test_ecb_dec[3][8] = -{ - { 0xCD, 0xD6, 0x4F, 0x2F, 0x94, 0x27, 0xC1, 0x5D }, - { 0x69, 0x96, 0xC8, 0xFA, 0x47, 0xA2, 0xAB, 0xEB }, - { 0x83, 0x25, 0x39, 0x76, 0x44, 0x09, 0x1A, 0x0A } -}; - -static const unsigned char des3_test_ecb_enc[3][8] = -{ - { 0x6A, 0x2A, 0x19, 0xF4, 0x1E, 0xCA, 0x85, 0x4B }, - { 0x03, 0xE6, 0x9F, 0x5B, 0xFA, 0x58, 0xEB, 0x42 }, - { 0xDD, 0x17, 0xE8, 0xB8, 0xB4, 0x37, 0xD2, 0x32 } -}; - -static const unsigned char des3_test_cbc_dec[3][8] = -{ - { 0x12, 0x9F, 0x40, 0xB9, 0xD2, 0x00, 0x56, 0xB3 }, - { 0x47, 0x0E, 0xFC, 0x9A, 0x6B, 0x8E, 0xE3, 0x93 }, - { 0xC5, 0xCE, 0xCF, 0x63, 0xEC, 0xEC, 0x51, 0x4C } -}; - -static const unsigned char des3_test_cbc_enc[3][8] = -{ - { 0x54, 0xF1, 0x5A, 0xF6, 0xEB, 0xE3, 0xA4, 0xB4 }, - { 0x35, 0x76, 0x11, 0x56, 0x5F, 0xA1, 0x8E, 0x4D }, - { 0xCB, 0x19, 0x1F, 0x85, 0xD1, 0xED, 0x84, 0x39 } -}; - -/* - * Checkup routine - */ -int des_self_test( int verbose ) -{ - int i, j, u, v; - des_context ctx; - des3_context ctx3; - unsigned char key[24]; - unsigned char buf[8]; - unsigned char prv[8]; - unsigned char iv[8]; - - memset( key, 0, 24 ); - - /* - * ECB mode - */ - for( i = 0; i < 6; i++ ) - { - u = i >> 1; - v = i & 1; - - if( verbose != 0 ) - printf( " DES%c-ECB-%3d (%s): ", - ( u == 0 ) ? ' ' : '3', 56 + u * 56, - ( v == DES_DECRYPT ) ? "dec" : "enc" ); - - memcpy( buf, des3_test_buf, 8 ); - - switch( i ) - { - case 0: - des_setkey_dec( &ctx, (unsigned char *) des3_test_keys ); - break; - - case 1: - des_setkey_enc( &ctx, (unsigned char *) des3_test_keys ); - break; - - case 2: - des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 3: - des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 4: - des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 5: - des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys ); - break; - - default: - return( 1 ); - } - - for( j = 0; j < 10000; j++ ) - { - if( u == 0 ) - des_crypt_ecb( &ctx, buf, buf ); - else - des3_crypt_ecb( &ctx3, buf, buf ); - } - - if( ( v == DES_DECRYPT && - memcmp( buf, des3_test_ecb_dec[u], 8 ) != 0 ) || - ( v != DES_DECRYPT && - memcmp( buf, des3_test_ecb_enc[u], 8 ) != 0 ) ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - printf( "passed\n" ); - } - - if( verbose != 0 ) - printf( "\n" ); - - /* - * CBC mode - */ - for( i = 0; i < 6; i++ ) - { - u = i >> 1; - v = i & 1; - - if( verbose != 0 ) - printf( " DES%c-CBC-%3d (%s): ", - ( u == 0 ) ? ' ' : '3', 56 + u * 56, - ( v == DES_DECRYPT ) ? "dec" : "enc" ); - - memcpy( iv, des3_test_iv, 8 ); - memcpy( prv, des3_test_iv, 8 ); - memcpy( buf, des3_test_buf, 8 ); - - switch( i ) - { - case 0: - des_setkey_dec( &ctx, (unsigned char *) des3_test_keys ); - break; - - case 1: - des_setkey_enc( &ctx, (unsigned char *) des3_test_keys ); - break; - - case 2: - des3_set2key_dec( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 3: - des3_set2key_enc( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 4: - des3_set3key_dec( &ctx3, (unsigned char *) des3_test_keys ); - break; - - case 5: - des3_set3key_enc( &ctx3, (unsigned char *) des3_test_keys ); - break; - - default: - return( 1 ); - } - - if( v == DES_DECRYPT ) - { - for( j = 0; j < 10000; j++ ) - { - if( u == 0 ) - des_crypt_cbc( &ctx, v, 8, iv, buf, buf ); - else - des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf ); - } - } - else - { - for( j = 0; j < 10000; j++ ) - { - unsigned char tmp[8]; - - if( u == 0 ) - des_crypt_cbc( &ctx, v, 8, iv, buf, buf ); - else - des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf ); - - memcpy( tmp, prv, 8 ); - memcpy( prv, buf, 8 ); - memcpy( buf, tmp, 8 ); - } - - memcpy( buf, prv, 8 ); - } - - if( ( v == DES_DECRYPT && - memcmp( buf, des3_test_cbc_dec[u], 8 ) != 0 ) || - ( v != DES_DECRYPT && - memcmp( buf, des3_test_cbc_enc[u], 8 ) != 0 ) ) - { - if( verbose != 0 ) - printf( "failed\n" ); - - return( 1 ); - } - - if( verbose != 0 ) - printf( "passed\n" ); - } - - if( verbose != 0 ) - printf( "\n" ); - - return( 0 ); -} - -#endif - -#endif |