mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-14 13:44:49 +08:00
446 lines
11 KiB
C
446 lines
11 KiB
C
/* 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 "des.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<6; ++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;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
typedef struct {
|
|
union {
|
|
uint8_t v8[8];
|
|
uint32_t v32[2];
|
|
} d;
|
|
} data_t;
|
|
#define R (data.d.v32[1])
|
|
#define L (data.d.v32[0])
|
|
|
|
void des_enc(void* out, const void* in, const void* key){
|
|
|
|
uint8_t kr[6], k[7];
|
|
uint8_t i;
|
|
data_t data;
|
|
|
|
permute((uint8_t*)ip_permtab, (uint8_t*)in, data.d.v8);
|
|
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.d.v8, (uint8_t*)out);
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
void des_dec(void* out, const void* in, const uint8_t* key){
|
|
|
|
uint8_t kr[6],k[7];
|
|
int8_t i;
|
|
data_t data;
|
|
|
|
permute((uint8_t*)ip_permtab, (uint8_t*)in, data.d.v8);
|
|
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.d.v8, (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);
|
|
}
|
|
|
|
void tdes_2key_enc(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){
|
|
|
|
if( length % 8 ) return;
|
|
|
|
uint8_t i;
|
|
uint8_t* tin = (uint8_t*) in;
|
|
uint8_t* tout = (uint8_t*) out;
|
|
|
|
while( length > 0 )
|
|
{
|
|
for( i = 0; i < 8; i++ )
|
|
tout[i] = (unsigned char)( tin[i] ^ iv[i] );
|
|
|
|
des_enc(tout, tin, (uint8_t*)key + 0);
|
|
des_dec(tout, tout, (uint8_t*)key + 8);
|
|
des_enc(tout, tout, (uint8_t*)key + 0);
|
|
|
|
memcpy( iv, tout, 8 );
|
|
|
|
tin += 8;
|
|
tout += 8;
|
|
length -= 8;
|
|
}
|
|
}
|
|
|
|
void tdes_2key_dec(void* out, const void* in, size_t length, const void* key, unsigned char iv[8]){
|
|
|
|
if( length % 8 ) return;
|
|
|
|
uint8_t i;
|
|
unsigned char temp[8];
|
|
uint8_t* tin = (uint8_t*) in;
|
|
uint8_t* tout = (uint8_t*) out;
|
|
|
|
while( length > 0 )
|
|
{
|
|
memcpy( temp, tin, 8 );
|
|
|
|
des_dec(tout, tin, (uint8_t*)key + 0);
|
|
des_enc(tout, tout, (uint8_t*)key + 8);
|
|
des_dec(tout, tout, (uint8_t*)key + 0);
|
|
|
|
for( i = 0; i < 8; i++ )
|
|
tout[i] = (unsigned char)( tout[i] ^ iv[i] );
|
|
|
|
memcpy( iv, temp, 8 );
|
|
|
|
tin += 8;
|
|
tout += 8;
|
|
length -= 8;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************************************/
|
|
|
|
|