--- /dev/null
+/* des.c */
+/*
+ This file is part of the ARM-Crypto-Lib.
+ Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * \file des.c
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2007-06-16
+ * \brief DES and EDE-DES implementation
+ * \license GPLv3 or later
+ *
+ */
+#include <stdint.h>
+#include <string.h>
+
+const uint8_t sbox[256] = {
+ /* S-box 1 */
+ 0xE4, 0xD1, 0x2F, 0xB8, 0x3A, 0x6C, 0x59, 0x07,
+ 0x0F, 0x74, 0xE2, 0xD1, 0xA6, 0xCB, 0x95, 0x38,
+ 0x41, 0xE8, 0xD6, 0x2B, 0xFC, 0x97, 0x3A, 0x50,
+ 0xFC, 0x82, 0x49, 0x17, 0x5B, 0x3E, 0xA0, 0x6D,
+ /* S-box 2 */
+ 0xF1, 0x8E, 0x6B, 0x34, 0x97, 0x2D, 0xC0, 0x5A,
+ 0x3D, 0x47, 0xF2, 0x8E, 0xC0, 0x1A, 0x69, 0xB5,
+ 0x0E, 0x7B, 0xA4, 0xD1, 0x58, 0xC6, 0x93, 0x2F,
+ 0xD8, 0xA1, 0x3F, 0x42, 0xB6, 0x7C, 0x05, 0xE9,
+ /* S-box 3 */
+ 0xA0, 0x9E, 0x63, 0xF5, 0x1D, 0xC7, 0xB4, 0x28,
+ 0xD7, 0x09, 0x34, 0x6A, 0x28, 0x5E, 0xCB, 0xF1,
+ 0xD6, 0x49, 0x8F, 0x30, 0xB1, 0x2C, 0x5A, 0xE7,
+ 0x1A, 0xD0, 0x69, 0x87, 0x4F, 0xE3, 0xB5, 0x2C,
+ /* S-box 4 */
+ 0x7D, 0xE3, 0x06, 0x9A, 0x12, 0x85, 0xBC, 0x4F,
+ 0xD8, 0xB5, 0x6F, 0x03, 0x47, 0x2C, 0x1A, 0xE9,
+ 0xA6, 0x90, 0xCB, 0x7D, 0xF1, 0x3E, 0x52, 0x84,
+ 0x3F, 0x06, 0xA1, 0xD8, 0x94, 0x5B, 0xC7, 0x2E,
+ /* S-box 5 */
+ 0x2C, 0x41, 0x7A, 0xB6, 0x85, 0x3F, 0xD0, 0xE9,
+ 0xEB, 0x2C, 0x47, 0xD1, 0x50, 0xFA, 0x39, 0x86,
+ 0x42, 0x1B, 0xAD, 0x78, 0xF9, 0xC5, 0x63, 0x0E,
+ 0xB8, 0xC7, 0x1E, 0x2D, 0x6F, 0x09, 0xA4, 0x53,
+ /* S-box 6 */
+ 0xC1, 0xAF, 0x92, 0x68, 0x0D, 0x34, 0xE7, 0x5B,
+ 0xAF, 0x42, 0x7C, 0x95, 0x61, 0xDE, 0x0B, 0x38,
+ 0x9E, 0xF5, 0x28, 0xC3, 0x70, 0x4A, 0x1D, 0xB6,
+ 0x43, 0x2C, 0x95, 0xFA, 0xBE, 0x17, 0x60, 0x8D,
+ /* S-box 7 */
+ 0x4B, 0x2E, 0xF0, 0x8D, 0x3C, 0x97, 0x5A, 0x61,
+ 0xD0, 0xB7, 0x49, 0x1A, 0xE3, 0x5C, 0x2F, 0x86,
+ 0x14, 0xBD, 0xC3, 0x7E, 0xAF, 0x68, 0x05, 0x92,
+ 0x6B, 0xD8, 0x14, 0xA7, 0x95, 0x0F, 0xE2, 0x3C,
+ /* S-box 8 */
+ 0xD2, 0x84, 0x6F, 0xB1, 0xA9, 0x3E, 0x50, 0xC7,
+ 0x1F, 0xD8, 0xA3, 0x74, 0xC5, 0x6B, 0x0E, 0x92,
+ 0x7B, 0x41, 0x9C, 0xE2, 0x06, 0xAD, 0xF3, 0x58,
+ 0x21, 0xE7, 0x4A, 0x8D, 0xFC, 0x90, 0x35, 0x6B
+};
+
+const uint8_t e_permtab[] ={
+ 4, 6, /* 4 bytes in 6 bytes out*/
+ 32, 1, 2, 3, 4, 5,
+ 4, 5, 6, 7, 8, 9,
+ 8, 9, 10, 11, 12, 13,
+ 12, 13, 14, 15, 16, 17,
+ 16, 17, 18, 19, 20, 21,
+ 20, 21, 22, 23, 24, 25,
+ 24, 25, 26, 27, 28, 29,
+ 28, 29, 30, 31, 32, 1
+};
+
+const uint8_t p_permtab[] ={
+ 4, 4, /* 32 bit -> 32 bit */
+ 16, 7, 20, 21,
+ 29, 12, 28, 17,
+ 1, 15, 23, 26,
+ 5, 18, 31, 10,
+ 2, 8, 24, 14,
+ 32, 27, 3, 9,
+ 19, 13, 30, 6,
+ 22, 11, 4, 25
+};
+
+const uint8_t ip_permtab[] ={
+ 8, 8, /* 64 bit -> 64 bit */
+ 58, 50, 42, 34, 26, 18, 10, 2,
+ 60, 52, 44, 36, 28, 20, 12, 4,
+ 62, 54, 46, 38, 30, 22, 14, 6,
+ 64, 56, 48, 40, 32, 24, 16, 8,
+ 57, 49, 41, 33, 25, 17, 9, 1,
+ 59, 51, 43, 35, 27, 19, 11, 3,
+ 61, 53, 45, 37, 29, 21, 13, 5,
+ 63, 55, 47, 39, 31, 23, 15, 7
+};
+
+const uint8_t inv_ip_permtab[] ={
+ 8, 8, /* 64 bit -> 64 bit */
+ 40, 8, 48, 16, 56, 24, 64, 32,
+ 39, 7, 47, 15, 55, 23, 63, 31,
+ 38, 6, 46, 14, 54, 22, 62, 30,
+ 37, 5, 45, 13, 53, 21, 61, 29,
+ 36, 4, 44, 12, 52, 20, 60, 28,
+ 35, 3, 43, 11, 51, 19, 59, 27,
+ 34, 2, 42, 10, 50, 18, 58, 26,
+ 33, 1, 41, 9, 49, 17, 57, 25
+};
+
+const uint8_t pc1_permtab[] ={
+ 8, 7, /* 64 bit -> 56 bit*/
+ 57, 49, 41, 33, 25, 17, 9,
+ 1, 58, 50, 42, 34, 26, 18,
+ 10, 2, 59, 51, 43, 35, 27,
+ 19, 11, 3, 60, 52, 44, 36,
+ 63, 55, 47, 39, 31, 23, 15,
+ 7, 62, 54, 46, 38, 30, 22,
+ 14, 6, 61, 53, 45, 37, 29,
+ 21, 13, 5, 28, 20, 12, 4
+};
+
+const uint8_t pc2_permtab[] ={
+ 7, 6, /* 56 bit -> 48 bit */
+ 14, 17, 11, 24, 1, 5,
+ 3, 28, 15, 6, 21, 10,
+ 23, 19, 12, 4, 26, 8,
+ 16, 7, 27, 20, 13, 2,
+ 41, 52, 31, 37, 47, 55,
+ 30, 40, 51, 45, 33, 48,
+ 44, 49, 39, 56, 34, 53,
+ 46, 42, 50, 36, 29, 32
+};
+
+const uint8_t splitin6bitword_permtab[] = {
+ 8, 8, /* 64 bit -> 64 bit */
+ 64, 64, 1, 6, 2, 3, 4, 5,
+ 64, 64, 7, 12, 8, 9, 10, 11,
+ 64, 64, 13, 18, 14, 15, 16, 17,
+ 64, 64, 19, 24, 20, 21, 22, 23,
+ 64, 64, 25, 30, 26, 27, 28, 29,
+ 64, 64, 31, 36, 32, 33, 34, 35,
+ 64, 64, 37, 42, 38, 39, 40, 41,
+ 64, 64, 43, 48, 44, 45, 46, 47
+};
+
+const uint8_t shiftkey_permtab[] = {
+ 7, 7, /* 56 bit -> 56 bit */
+ 2, 3, 4, 5, 6, 7, 8, 9,
+ 10, 11, 12, 13, 14, 15, 16, 17,
+ 18, 19, 20, 21, 22, 23, 24, 25,
+ 26, 27, 28, 1,
+ 30, 31, 32, 33, 34, 35, 36, 37,
+ 38, 39, 40, 41, 42, 43, 44, 45,
+ 46, 47, 48, 49, 50, 51, 52, 53,
+ 54, 55, 56, 29
+};
+
+const uint8_t shiftkeyinv_permtab[] = {
+ 7, 7,
+ 28, 1, 2, 3, 4, 5, 6, 7,
+ 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23,
+ 24, 25, 26, 27,
+ 56, 29, 30, 31, 32, 33, 34, 35,
+ 36, 37, 38, 39, 40, 41, 42, 43,
+ 44, 45, 46, 47, 48, 49, 50, 51,
+ 52, 53, 54, 55
+};
+
+/*
+1 0
+1 0
+2 1
+2 1
+2 1
+2 1
+2 1
+2 1
+----
+1 0
+2 1
+2 1
+2 1
+2 1
+2 1
+2 1
+1 0
+*/
+#define ROTTABLE 0x7EFC
+#define ROTTABLE_INV 0x3F7E
+/******************************************************************************/
+
+void permute(const uint8_t *ptable, const uint8_t *in, uint8_t *out){
+ uint8_t ob; /* in-bytes and out-bytes */
+ uint8_t byte, bit; /* counter for bit and byte */
+ ob = ptable[1];
+ ptable = &(ptable[2]);
+ for(byte=0; byte<ob; ++byte){
+ uint8_t x,t=0;
+ for(bit=0; bit<8; ++bit){
+ x=*ptable++ -1 ;
+ t<<=1;
+ if((in[x/8]) & (0x80>>(x%8)) ){
+ t|=0x01;
+ }
+ }
+ out[byte]=t;
+ }
+}
+
+/******************************************************************************/
+
+void changeendian32(uint32_t * a){
+ *a = (*a & 0x000000FF) << 24 |
+ (*a & 0x0000FF00) << 8 |
+ (*a & 0x00FF0000) >> 8 |
+ (*a & 0xFF000000) >> 24;
+}
+
+/******************************************************************************/
+static inline
+void shiftkey(uint8_t *key){
+ uint8_t k[7];
+ memcpy(k, key, 7);
+ permute((uint8_t*)shiftkey_permtab, k, key);
+}
+
+/******************************************************************************/
+static inline
+void shiftkey_inv(uint8_t *key){
+ uint8_t k[7];
+ memcpy(k, key, 7);
+ permute((uint8_t*)shiftkeyinv_permtab, k, key);
+
+}
+
+/******************************************************************************/
+static inline
+uint64_t splitin6bitwords(uint64_t a){
+ uint64_t ret=0;
+ a &= 0x0000ffffffffffffLL;
+ permute((uint8_t*)splitin6bitword_permtab, (uint8_t*)&a, (uint8_t*)&ret);
+ return ret;
+}
+
+/******************************************************************************/
+
+static inline
+uint8_t substitute(uint8_t a, uint8_t * sbp){
+ uint8_t x;
+ x = sbp[a>>1];
+ x = (a&1)?x&0x0F:x>>4;
+ return x;
+
+}
+
+/******************************************************************************/
+
+uint32_t des_f(uint32_t r, uint8_t* kr){
+ uint8_t i;
+ uint32_t t=0,ret;
+ uint64_t data;
+ uint8_t *sbp; /* sboxpointer */
+ permute((uint8_t*)e_permtab, (uint8_t*)&r, (uint8_t*)&data);
+ for(i=0; i<7; ++i)
+ ((uint8_t*)&data)[i] ^= kr[i];
+
+ /* Sbox substitution */
+ data = splitin6bitwords(data);
+ sbp=(uint8_t*)sbox;
+ for(i=0; i<8; ++i){
+ uint8_t x;
+ x = substitute(((uint8_t*)&data)[i], sbp);
+ t<<=4;
+ t |= x;
+ sbp += 32;
+ }
+ changeendian32(&t);
+
+ permute((uint8_t*)p_permtab,(uint8_t*)&t, (uint8_t*)&ret);
+
+ return ret;
+}
+
+/******************************************************************************/
+
+void des_enc(void* out, const void* in, const void* key){
+#define R *((uint32_t*)&(data[4]))
+#define L *((uint32_t*)&(data[0]))
+
+ uint8_t data[8],kr[6],k[7];
+ uint8_t i;
+
+ permute((uint8_t*)ip_permtab, (uint8_t*)in, data);
+ permute((uint8_t*)pc1_permtab, (const uint8_t*)key, k);
+ for(i=0; i<8; ++i){
+ shiftkey(k);
+ if(ROTTABLE&((1<<((i<<1)+0))) )
+ shiftkey(k);
+ permute((uint8_t*)pc2_permtab, k, kr);
+ L ^= des_f(R, kr);
+
+ shiftkey(k);
+ if(ROTTABLE&((1<<((i<<1)+1))) )
+ shiftkey(k);
+ permute((uint8_t*)pc2_permtab, k, kr);
+ R ^= des_f(L, kr);
+
+ }
+ /* L <-> R*/
+ R ^= L;
+ L ^= R;
+ R ^= L;
+
+ permute((uint8_t*)inv_ip_permtab, data, (uint8_t*)out);
+}
+
+/******************************************************************************/
+
+void des_dec(void* out, const void* in, const uint8_t* key){
+#define R *((uint32_t*)&(data[4]))
+#define L *((uint32_t*)&(data[0]))
+
+ uint8_t data[8],kr[6],k[7];
+ int8_t i;
+ permute((uint8_t*)ip_permtab, (uint8_t*)in, data);
+ permute((uint8_t*)pc1_permtab, (const uint8_t*)key, k);
+ for(i=7; i>=0; --i){
+
+ permute((uint8_t*)pc2_permtab, k, kr);
+ L ^= des_f(R, kr);
+ shiftkey_inv(k);
+ if(ROTTABLE&((1<<((i<<1)+1))) ){
+ shiftkey_inv(k);
+ }
+
+ permute((uint8_t*)pc2_permtab, k, kr);
+ R ^= des_f(L, kr);
+ shiftkey_inv(k);
+ if(ROTTABLE&((1<<((i<<1)+0))) ){
+ shiftkey_inv(k);
+ }
+
+ }
+ /* L <-> R*/
+ R ^= L;
+ L ^= R;
+ R ^= L;
+
+ permute((uint8_t*)inv_ip_permtab, data, (uint8_t*)out);
+}
+
+/******************************************************************************/
+
+void tdes_enc(void* out, void* in, const void* key){
+ des_enc(out, in, (uint8_t*)key + 0);
+ des_dec(out, out, (uint8_t*)key + 8);
+ des_enc(out, out, (uint8_t*)key +16);
+}
+
+/******************************************************************************/
+
+void tdes_dec(void* out, void* in, const uint8_t* key){
+ des_dec(out, in, (uint8_t*)key +16);
+ des_enc(out, out, (uint8_t*)key + 8);
+ des_dec(out, out, (uint8_t*)key + 0);
+}
+
+/******************************************************************************/
+
+
projects / proxmark3-svn / blobdiff