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3des2304.c
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/*
* Triple Data Encryption Standard 2304
* 3DES-2304 by Alexander Pukall 2014
*
* 2304-bit keys with 3 * 16 * 48-bit subkeys
*
* Based on 3DES by NIST and Daniel Huertas Gonzalez
*
* Same speed as 3DES-168 but with 2304-bit keys
*
* Uses MD2II hash function to create the 3 * 16 subkeys
*
* Code free for all, even for commercial software
* No restriction to use. Public Domain
*
* Compile with gcc: gcc 3des2304.c -o 3des2304
*
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#define n1 288 /* 2304-bit Triple DES key for 3 * 16 * 48-bit subkeys */
int x1,x2,i;
unsigned char h2[n1];
unsigned char h1[n1*3];
static void init()
{
x1 = 0;
x2 = 0;
for (i = 0; i < n1; i++)
h2[i] = 0;
for (i = 0; i < n1; i++)
h1[i] = 0;
}
static void hashing(unsigned char t1[], size_t b6)
{
static unsigned char s4[256] =
{ 13, 199, 11, 67, 237, 193, 164, 77, 115, 184, 141, 222, 73,
38, 147, 36, 150, 87, 21, 104, 12, 61, 156, 101, 111, 145,
119, 22, 207, 35, 198, 37, 171, 167, 80, 30, 219, 28, 213,
121, 86, 29, 214, 242, 6, 4, 89, 162, 110, 175, 19, 157,
3, 88, 234, 94, 144, 118, 159, 239, 100, 17, 182, 173, 238,
68, 16, 79, 132, 54, 163, 52, 9, 58, 57, 55, 229, 192,
170, 226, 56, 231, 187, 158, 70, 224, 233, 245, 26, 47, 32,
44, 247, 8, 251, 20, 197, 185, 109, 153, 204, 218, 93, 178,
212, 137, 84, 174, 24, 120, 130, 149, 72, 180, 181, 208, 255,
189, 152, 18, 143, 176, 60, 249, 27, 227, 128, 139, 243, 253,
59, 123, 172, 108, 211, 96, 138, 10, 215, 42, 225, 40, 81,
65, 90, 25, 98, 126, 154, 64, 124, 116, 122, 5, 1, 168,
83, 190, 131, 191, 244, 240, 235, 177, 155, 228, 125, 66, 43,
201, 248, 220, 129, 188, 230, 62, 75, 71, 78, 34, 31, 216,
254, 136, 91, 114, 106, 46, 217, 196, 92, 151, 209, 133, 51,
236, 33, 252, 127, 179, 69, 7, 183, 105, 146, 97, 39, 15,
205, 112, 200, 166, 223, 45, 48, 246, 186, 41, 148, 140, 107,
76, 85, 95, 194, 142, 50, 49, 134, 23, 135, 169, 221, 210,
203, 63, 165, 82, 161, 202, 53, 14, 206, 232, 103, 102, 195,
117, 250, 99, 0, 74, 160, 241, 2, 113};
int b1,b2,b3,b4,b5;
b4=0;
while (b6) {
for (; b6 && x2 < n1; b6--, x2++) {
b5 = t1[b4++];
h1[x2 + n1] = b5;
h1[x2 + (n1*2)] = b5 ^ h1[x2];
x1 = h2[x2] ^= s4[b5 ^ x1];
}
if (x2 == n1)
{
b2 = 0;
x2 = 0;
for (b3 = 0; b3 < (n1+2); b3++) {
for (b1 = 0; b1 < (n1*3); b1++)
b2 = h1[b1] ^= s4[b2];
b2 = (b2 + b3) % 256;
}
}
}
}
static void end(unsigned char h4[n1])
{
unsigned char h3[n1];
int i, n4;
n4 = n1 - x2;
for (i = 0; i < n4; i++) h3[i] = n4;
hashing(h3, n4);
hashing(h2, sizeof(h2));
for (i = 0; i < n1; i++) h4[i] = h1[i];
}
#define LB32_MASK 0x00000001
#define LB64_MASK 0x0000000000000001
#define L64_MASK 0x00000000ffffffff
#define H64_MASK 0xffffffff00000000
/* Initial Permutation Table */
static char IP[] = {
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
};
/* Inverse Initial Permutation Table */
static char PI[] = {
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
};
/*Expansion table */
static char E[] = {
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
};
/* Post S-Box permutation */
static char P[] = {
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
};
/* The S-Box tables */
static char S[8][64] = {{
/* S1 */
14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
},{
/* S2 */
15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
},{
/* S3 */
10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
},{
/* S4 */
7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
},{
/* S5 */
2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
},{
/* S6 */
12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
},{
/* S7 */
4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
},{
/* S8 */
13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
}};
/*
* The DES function
* input: 64 bit message
* key: 64 bit key for encryption/decryption
* mode: 'e' = encryption; 'd' = decryption
*/
uint64_t des(uint64_t input, unsigned char key[n1], char mode, unsigned char start)
{
int i, j;
/* 8 bits */
char row, column;
/* 28 bits */
uint32_t C = 0;
uint32_t D = 0;
/* 32 bits */
uint32_t L = 0;
uint32_t R = 0;
uint32_t s_output = 0;
uint32_t f_function_res = 0;
uint32_t temp = 0;
/* 48 bits */
uint64_t sub_key[16] = {0};
uint64_t s_input = 0;
/* 64 bits */
uint64_t init_perm_res = 0;
uint64_t inv_init_perm_res = 0;
uint64_t pre_output = 0;
/* initial permutation */
for (i = 0; i < 64; i++) {
init_perm_res <<= 1;
init_perm_res |= (input >> (64-IP[i])) & LB64_MASK;
}
L = (uint32_t) (init_perm_res >> 32) & L64_MASK;
R = (uint32_t) init_perm_res & L64_MASK;
/* 16 subkeys */
for (i = 0; i< 16; i++)
{
sub_key[i] = 0;
for (j = 0; j < 6; j++) sub_key[i]=(sub_key[i]<<8)+(key[start+((i*6)+j)]&0xff);
}
for (i = 0; i < 16; i++) {
/* print 16 subkeys */
/* printf("sub_key[%d]=%012llX\n",i,sub_key[i]); */
/* f(R,k) function */
s_input = 0;
for (j = 0; j< 48; j++) {
s_input <<= 1;
s_input |= (uint64_t) ((R >> (32-E[j])) & LB32_MASK);
}
/*
* Encryption/Decryption
* XORing expanded Ri with Ki
*/
if (mode == 'd') {
// decryption
s_input = s_input ^ sub_key[15-i];
} else {
// encryption
s_input = s_input ^ sub_key[i];
}
/* S-Box Tables */
for (j = 0; j < 8; j++) {
// 00 00 RCCC CR00 00 00 00 00 00 s_input
// 00 00 1000 0100 00 00 00 00 00 row mask
// 00 00 0111 1000 00 00 00 00 00 column mask
row = (char) ((s_input & (0x0000840000000000 >> 6*j)) >> 42-6*j);
row = (row >> 4) | row & 0x01;
column = (char) ((s_input & (0x0000780000000000 >> 6*j)) >> 43-6*j);
s_output <<= 4;
s_output |= (uint32_t) (S[j][16*row + column] & 0x0f);
}
f_function_res = 0;
for (j = 0; j < 32; j++) {
f_function_res <<= 1;
f_function_res |= (s_output >> (32 - P[j])) & LB32_MASK;
}
temp = R;
R = L ^ f_function_res;
L = temp;
}
pre_output = (((uint64_t) R) << 32) | (uint64_t) L;
/* inverse initial permutation */
for (i = 0; i < 64; i++) {
inv_init_perm_res <<= 1;
inv_init_perm_res |= (pre_output >> (64-PI[i])) & LB64_MASK;
}
return inv_init_perm_res;
}
uint64_t TripleDES(uint64_t input, unsigned char key[n1], char mode)
{
uint64_t result;
if (mode == 'd') /* DECRYPTION */
{
result = des(input, key, 'd', 192); /* DECRYPT with KEY3 */
result = des(result, key, 'e', 96); /* ENCRYPT with KEY2 */
result = des(result, key, 'd', 0); /* DECRYPT with KEY1 */
}
else /* ENCRYPTION */
{
result = des(input, key, 'e', 0); /* ENCRYPT with KEY1 */
result = des(result, key, 'd', 96); /* DECRYPT with KEY2 */
result = des(result, key, 'e', 192); /* ENCRYPT with KEY3 */
}
return result;
}
void main() {
unsigned char text[33]; /* up to 512 chars for the password */
/* password can be hexadecimal */
uint64_t input; /* 3DES block plaintext */
uint64_t result; /* ciphertext or plaintext after decryption */
unsigned char h4[n1];
printf("3DES-2304 by Alexander PUKALL 2014 \n Triple Data Encryption Standard with 2304-bit subkeys \n");
printf("Code can be freely use even for commercial software\n");
printf("Based on 3DES by NIST and Daniel Huertas Gonzalez\n");
printf("Same speed as 3DES-168 but with 2304-bit keys\n\n");
/* The key creation procedure is slow, it only needs to be done once */
/* as long as the user does not change the key. You can encrypt and decrypt */
/* as many blocks as you want without having to hash the key again. */
/* init(); hashing(text,length); end(h4); -> only once */
/* Encryption 1 */
input = 0xFEFEFEFEFEFEFEFE; /* 3DES block plaintext */
init();
strcpy((char *) text,"My secret password!0123456789abc");
hashing(text, 32);
end(h4); /* h4 = 2304-bit key from hash "My secret password!0123456789abc */
printf("Key 1:%s\n",text);
printf ("Plaintext 1: %016llX\n", input);
result = TripleDES(input, h4, 'e');
printf ("Encryption 1: %016llX\n", result);
result = TripleDES(result, h4, 'd');
printf ("Decryption 1: %016llX\n", result);
/* Encryption 2 */
input = 0x0000000000000000; /* 3DES block plaintext */
init();
strcpy((char *) text,"My secret password!0123456789ABC");
hashing(text, 32);
end(h4); /* h4 = 2304-bit key from hash "My secret password!0123456789ABC */
printf("\nKey 2:%s\n",text);
printf ("Plaintext 2: %016llX\n", input);
result = TripleDES(input, h4, 'e');
printf ("Encryption 2: %016llX\n", result);
result = TripleDES(result, h4, 'd');
printf ("Decryption 2: %016llX\n", result);
/* Encryption 3 */
input = 0x0000000000000001; /* 3DES block plaintext */
init();
strcpy((char *) text,"My secret password!0123456789abZ");
hashing(text, 32);
end(h4); /* h4 = 2304-bit key from hash "My secret password!0123456789abZ */
printf("\nKey 3:%s\n",text);
printf ("Plaintext 3: %016llX\n", input);
result = TripleDES(input, h4, 'e');
printf ("Encryption 3: %016llX\n", result);
result = TripleDES(result, h4, 'd');
printf ("Decryption 3: %016llX\n", result);
}
/*
Key 1:My secret password!0123456789abc
Plaintext 1: FEFEFEFEFEFEFEFE
Encryption 1: 14CF403A1319BD09
Decryption 1: FEFEFEFEFEFEFEFE
Key 2:My secret password!0123456789ABC
Plaintext 2: 0000000000000000
Encryption 2: 1F1447B24267E773
Decryption 2: 0000000000000000
Key 3:My secret password!0123456789abZ
Plaintext 3: 0000000000000001
Encryption 3: 536C8BA8694B01DE
Decryption 3: 0000000000000001
*/