+/*
+ * FIPS-46-3 compliant Triple-DES implementation
+ *
+ * Copyright (C) 2006-2014, 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"
+#define POLARSSL_DES_C
+
+#if defined(POLARSSL_DES_C)
+
+#include "des.h"
+
+#if defined(POLARSSL_PLATFORM_C)
+#include "polarssl/platform.h"
+#else
+#define polarssl_printf printf
+#endif
+
+#if !defined(POLARSSL_DES_ALT)
+
+/*
+ * 32-bit integer manipulation macros (big endian)
+ */
+#ifndef GET_UINT32_BE
+#define GET_UINT32_BE(n,b,i) \
+{ \
+ (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
+ | ( (uint32_t) (b)[(i) + 1] << 16 ) \
+ | ( (uint32_t) (b)[(i) + 2] << 8 ) \
+ | ( (uint32_t) (b)[(i) + 3] ); \
+}
+#endif
+
+#ifndef PUT_UINT32_BE
+#define PUT_UINT32_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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t 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 uint32_t LHs[16] =
+{
+ 0x00000000, 0x00000001, 0x00000100, 0x00000101,
+ 0x00010000, 0x00010001, 0x00010100, 0x00010101,
+ 0x01000000, 0x01000001, 0x01000100, 0x01000101,
+ 0x01010000, 0x01010001, 0x01010100, 0x01010101
+};
+
+static const uint32_t 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) { uint32_t 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( uint32_t SK[32], const unsigned char key[DES_KEY_SIZE] )
+{
+ int i;
+ uint32_t X, Y, T;
+
+ GET_UINT32_BE( X, key, 0 );
+ GET_UINT32_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( uint32_t esk[96],
+ uint32_t 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] )
+{
+ uint32_t 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] )
+{
+ uint32_t sk[96];
+
+ des3_set2key( sk, ctx->sk, key );
+ memset( sk, 0, sizeof( sk ) );
+
+ return( 0 );
+}
+
+static void des3_set3key( uint32_t esk[96],
+ uint32_t 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] )
+{
+ uint32_t 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] )
+{
+ uint32_t 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;
+ uint32_t X, Y, T, *SK;
+
+ SK = ctx->sk;
+
+ GET_UINT32_BE( X, input, 0 );
+ GET_UINT32_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_UINT32_BE( Y, output, 0 );
+ PUT_UINT32_BE( X, output, 4 );
+
+ return( 0 );
+}
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+/*
+ * 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 );
+}
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+/*
+ * 3DES-ECB block encryption/decryption
+ */
+int des3_crypt_ecb( des3_context *ctx,
+ const unsigned char input[8],
+ unsigned char output[8] )
+{
+ int i;
+ uint32_t X, Y, T, *SK;
+
+ SK = ctx->sk;
+
+ GET_UINT32_BE( X, input, 0 );
+ GET_UINT32_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_UINT32_BE( Y, output, 0 );
+ PUT_UINT32_BE( X, output, 4 );
+
+ return( 0 );
+}
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+/*
+ * 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 );
+}
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+#endif /* !POLARSSL_DES_ALT */
+
+#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_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 }
+};
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+static const unsigned char des3_test_iv[8] =
+{
+ 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF,
+};
+
+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 }
+};
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+/*
+ * 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];
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+ unsigned char prv[8];
+ unsigned char iv[8];
+#endif
+
+ memset( key, 0, 24 );
+
+ /*
+ * ECB mode
+ */
+ for( i = 0; i < 6; i++ )
+ {
+ u = i >> 1;
+ v = i & 1;
+
+ if( verbose != 0 )
+ polarssl_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, des3_test_keys );
+ break;
+
+ case 1:
+ des_setkey_enc( &ctx, des3_test_keys );
+ break;
+
+ case 2:
+ des3_set2key_dec( &ctx3, des3_test_keys );
+ break;
+
+ case 3:
+ des3_set2key_enc( &ctx3, des3_test_keys );
+ break;
+
+ case 4:
+ des3_set3key_dec( &ctx3, des3_test_keys );
+ break;
+
+ case 5:
+ des3_set3key_enc( &ctx3, 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 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+ }
+
+ if( verbose != 0 )
+ polarssl_printf( "\n" );
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+ /*
+ * CBC mode
+ */
+ for( i = 0; i < 6; i++ )
+ {
+ u = i >> 1;
+ v = i & 1;
+
+ if( verbose != 0 )
+ polarssl_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, des3_test_keys );
+ break;
+
+ case 1:
+ des_setkey_enc( &ctx, des3_test_keys );
+ break;
+
+ case 2:
+ des3_set2key_dec( &ctx3, des3_test_keys );
+ break;
+
+ case 3:
+ des3_set2key_enc( &ctx3, des3_test_keys );
+ break;
+
+ case 4:
+ des3_set3key_dec( &ctx3, des3_test_keys );
+ break;
+
+ case 5:
+ des3_set3key_enc( &ctx3, 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 )
+ polarssl_printf( "failed\n" );
+
+ return( 1 );
+ }
+
+ if( verbose != 0 )
+ polarssl_printf( "passed\n" );
+ }
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+ if( verbose != 0 )
+ polarssl_printf( "\n" );
+
+ return( 0 );
+}
+
+#endif
+
+#endif
projects / proxmark3-svn / commitdiff