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eurocrypt.c
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/* hacktv - Analogue video transmitter for the HackRF */
/*=======================================================================*/
/* Copyright 2020 Alex L. James */
/* Copyright 2020 Philip Heron <[email protected]> */
/* */
/* 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/>. */
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "video.h"
#include <time.h>
#define ECM 0
#define HASH 1
#define EC_M 0x20
#define EC_S 0x30
#define EC_3DES 0x31
#define ROTATE_LEFT 1
#define ROTATE_RIGHT 2
/* Data for EC controlled-access decoding */
const static ec_mode_t _ec_modes[] = {
{ "tvs", EC_S, EC_S, { 0x5C, 0x8B, 0x11, 0x2F, 0x99, 0xA8, 0x2C }, { 0x00, 0x2B, 0x50 }, { "06/02/1999" }, { 0xFF, 0x00 }, "TV-S (S2)" },
{ "ctvs", EC_S, EC_S, { 0x27, 0x82, 0xC5, 0xA3, 0x2D, 0x34, 0xD4 }, { 0x00, 0x2B, 0x20 }, { "06/02/1999" }, { 0xFF, 0x00 }, "CTV (S2)" },
{ "ctv", EC_M, EC_M, { 0x84, 0x66, 0x30, 0xE4, 0xDA, 0xFA, 0x23 }, { 0x00, 0x04, 0x38 }, { "01/11/1995" }, { 0xFF, 0x00 }, "CTV (M)" },
{ "tvplus", EC_M, EC_M, { 0x12, 0x06, 0x28, 0x3A, 0x4B, 0x1D, 0xE2 }, { 0x00, 0x2C, 0x08 }, { "01/11/1995" }, { 0xFF, 0x00 }, "TVPlus (M)" },
{ "tv1000", EC_M, EC_M, { 0x48, 0x63, 0xC5, 0xB3, 0xDA, 0xE3, 0x29 }, { 0x00, 0x04, 0x18 }, { "01/11/1995" }, { 0xFF, 0x00 }, "TV1000 (M)" },
{ "tv3", EC_M, EC_M, { 0xE9, 0xF3, 0x34, 0x36, 0xB0, 0xBB, 0xF8 }, { 0x00, 0x04, 0x0C }, { "01/11/1996" }, { 0xFF, 0x00 }, "TV3 (M)" },
{ "filmnet", EC_M, EC_M, { 0x21, 0x12, 0x31, 0x35, 0x8A, 0xC3, 0x4F }, { 0x00, 0x28, 0x08 }, { "today" }, { 0xFF, 0x00 }, "FilmNet (M)" },
{ "nrk", EC_S, EC_M, { 0xE7, 0x19, 0x5B, 0x7C, 0x47, 0xF4, 0x66 }, { 0x47, 0x52, 0x00 }, { "06/02/1999" }, { 0xFF, 0x00 }, "NRK (S2)" },
{ "tv2", EC_S, EC_M, { 0x70, 0xBF, 0x6E, 0x51, 0x9F, 0xB8, 0xA6 }, { 0x47, 0x51, 0x00 }, { "06/02/1999" }, { 0xFF, 0x00 }, "TV2 Norway (S2)" },
{ "cplusfr43", EC_M, EC_M, { 0x69, 0x41, 0x2D, 0x4C, 0x56, 0x28, 0xCF }, { 0x10, 0x00, 0x18 }, { "01/01/1997" }, { 0xFF, 0x00 }, "Canal+ 4/3 (M)" },
{ "cplusfr169", EC_M, EC_M, { 0xEC, 0xA6, 0xE8, 0x4E, 0x10, 0x41, 0x6F }, { 0x10, 0x00, 0x28 }, { "01/01/1997" }, { 0xFF, 0x00 }, "Canal+ 16/9 (M)" },
{ "cinecfr", EC_M, EC_M, { 0x34, 0x94, 0x2B, 0x9B, 0xE5, 0xC1, 0xA2 }, { 0x10, 0x00, 0x38 }, { "today" }, { 0xFF, 0x00 }, "Cine Cinemas (M)" },
{ "cplus", EC_3DES, EC_3DES, { 0x62, 0xA7, 0x01, 0xA0, 0x5E, 0x8B, 0xB9, /* Key 02 and key 03 - index key E */
0xCB, 0x86, 0x67, 0x27, 0x5C, 0x53, 0x17 }, { 0x00, 0x2B, 0x1E }, { "06/02/1999" }, { 0xFF, 0x00 }, "Canal+ (3DES)" },
{ NULL }
};
/* Data for EC controlled-access EMMs */
const static em_mode_t _em_modes[] = {
{ "tv3", EC_M, EC_M, { 0x99, 0xCF, 0xCA, 0x13, 0x7A, 0x53, 0x6D }, { 0x00, 0x04, 0x04 }, { 0x70, 0x31, 0x12 }, { 0xF0, 0xF0, 0xF0, 0xF0, 0xF0 }, EMMU },
{ "cplusfr43", EC_M, EC_M, { 0x39, 0x74, 0xD7, 0xC1, 0x3F, 0x1B, 0x0D }, { 0x10, 0x00, 0x15 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "cplusfr169", EC_M, EC_M, { 0x12, 0x37, 0x5A, 0x43, 0xE4, 0xA1, 0x48 }, { 0x10, 0x00, 0x26 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "cinecfr", EC_M, EC_M, { 0xBF, 0x6D, 0xFE, 0x99, 0x69, 0x63, 0x40 }, { 0x10, 0x00, 0x35 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "filmnet", EC_M, EC_M, { 0x13, 0x39, 0x6F, 0xDB, 0x3A, 0x88, 0x60 }, { 0x00, 0x28, 0x06 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "ctv", EC_M, EC_M, { 0x5E, 0xC9, 0xD7, 0x19, 0x89, 0x64, 0xE6 }, { 0x00, 0x04, 0x34 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMS },
{ "ctvs", EC_3DES, EC_S, { 0x64, 0x34, 0xF4, 0x14, 0x0B, 0x01, 0x00,
0xA3, 0x8E, 0xEF, 0x1A, 0x65, 0x6A, 0x2C }, { 0x00, 0x2B, 0x20 }, { 0x80, 0x09, 0x3D }, { 0xA1, 0x6C, 0xAF, 0x2F, 0x00 }, EMMU },
{ "cplus", EC_3DES, EC_3DES, { 0x10, 0xDD, 0x38, 0x71, 0xCB, 0xCB, 0x6A,
0x52, 0xA8, 0x54, 0xA1, 0xA7, 0xE5, 0x0D }, { 0x00, 0x2B, 0x10 }, { 0x80, 0x09, 0x3D }, { 0xA1, 0x6C, 0xAF, 0x2F, 0x00 }, EMMS },
{ "tvplus", EC_M, EC_M, { 0x21, 0xF5, 0x50, 0xAC, 0x0E, 0xF4, 0xA7 }, { 0x00, 0x2C, 0x03 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "btv", EC_M, EC_M, { 0xBB, 0x2D, 0x2E, 0xC5, 0x50, 0x28, 0x1E }, { 0x00, 0x2C, 0x43 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMG },
{ "rdv", EC_S, EC_S, { 0x13, 0x39, 0x6F, 0xDB, 0x3A, 0x88, 0x60 }, { 0x00, 0x2d, 0x80 }, { 0x70, 0x31, 0x12 }, { 0x00, 0x00, 0x00, 0x00, 0x00 }, EMMS },
{ "tv2", EC_3DES, EC_M, { 0xEA, 0xC5, 0xE3, 0x45, 0x8E, 0x82, 0xCE,
0x83, 0x2A, 0x98, 0x4C, 0xD9, 0xBA, 0x31 }, { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0x00 }, { 0x3E, 0xE3, 0x8E, 0x06, 0x00 }, EMMU },
{ NULL }
};
/* Initial permutation for Eurocrypt-S2/3DES */
static const uint8_t _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/final permutation for Eurocrypt-S2/3DES */
static const uint8_t _ipp[] = {
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,
};
static const uint8_t _exp[] = {
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
};
static const uint8_t _sb[][64] = {
{ 0xE, 0x0, 0x4, 0xF, 0xD, 0x7, 0x1, 0x4,
0x2, 0xE, 0xF, 0x2, 0xB, 0xD, 0x8, 0x1,
0x3, 0xA, 0xA, 0x6, 0x6, 0xC, 0xC, 0xB,
0x5, 0x9, 0x9, 0x5, 0x0, 0x3, 0x7, 0x8,
0x4, 0xF, 0x1, 0xC, 0xE, 0x8, 0x8, 0x2,
0xD, 0x4, 0x6, 0x9, 0x2, 0x1, 0xB, 0x7,
0xF, 0x5, 0xC, 0xB, 0x9, 0x3, 0x7, 0xE,
0x3, 0xA, 0xA, 0x0, 0x5, 0x6, 0x0, 0xD
},
{ 0xF, 0x3, 0x1, 0xD, 0x8, 0x4, 0xE, 0x7,
0x6, 0xF, 0xB, 0x2, 0x3, 0x8, 0x4, 0xE,
0x9, 0xC, 0x7, 0x0, 0x2, 0x1, 0xD, 0xA,
0xC, 0x6, 0x0, 0x9, 0x5, 0xB, 0xA, 0x5,
0x0, 0xD, 0xE, 0x8, 0x7, 0xA, 0xB, 0x1,
0xA, 0x3, 0x4, 0xF, 0xD, 0x4, 0x1, 0x2,
0x5, 0xB, 0x8, 0x6, 0xC, 0x7, 0x6, 0xC,
0x9, 0x0, 0x3, 0x5, 0x2, 0xE, 0xF, 0x9
},
{ 0xA, 0xD, 0x0, 0x7, 0x9, 0x0, 0xE, 0x9,
0x6, 0x3, 0x3, 0x4, 0xF, 0x6, 0x5, 0xA,
0x1, 0x2, 0xD, 0x8, 0xC, 0x5, 0x7, 0xE,
0xB, 0xC, 0x4, 0xB, 0x2, 0xF, 0x8, 0x1,
0xD, 0x1, 0x6, 0xA, 0x4, 0xD, 0x9, 0x0,
0x8, 0x6, 0xF, 0x9, 0x3, 0x8, 0x0, 0x7,
0xB, 0x4, 0x1, 0xF, 0x2, 0xE, 0xC, 0x3,
0x5, 0xB, 0xA, 0x5, 0xE, 0x2, 0x7, 0xC
},
{ 0x7, 0xD, 0xD, 0x8, 0xE, 0xB, 0x3, 0x5,
0x0, 0x6, 0x6, 0xF, 0x9, 0x0, 0xA, 0x3,
0x1, 0x4, 0x2, 0x7, 0x8, 0x2, 0x5, 0xC,
0xB, 0x1, 0xC, 0xA, 0x4, 0xE, 0xF, 0x9,
0xA, 0x3, 0x6, 0xF, 0x9, 0x0, 0x0, 0x6,
0xC, 0xA, 0xB, 0x1, 0x7, 0xD, 0xD, 0x8,
0xF, 0x9, 0x1, 0x4, 0x3, 0x5, 0xE, 0xB,
0x5, 0xC, 0x2, 0x7, 0x8, 0x2, 0x4, 0xE
},
{ 0x2, 0xE, 0xC, 0xB, 0x4, 0x2, 0x1, 0xC,
0x7, 0x4, 0xA, 0x7, 0xB, 0xD, 0x6, 0x1,
0x8, 0x5, 0x5, 0x0, 0x3, 0xF, 0xF, 0xA,
0xD, 0x3, 0x0, 0x9, 0xE, 0x8, 0x9, 0x6,
0x4, 0xB, 0x2, 0x8, 0x1, 0xC, 0xB, 0x7,
0xA, 0x1, 0xD, 0xE, 0x7, 0x2, 0x8, 0xD,
0xF, 0x6, 0x9, 0xF, 0xC, 0x0, 0x5, 0x9,
0x6, 0xA, 0x3, 0x4, 0x0, 0x5, 0xE, 0x3
},
{ 0xC, 0xA, 0x1, 0xF, 0xA, 0x4, 0xF, 0x2,
0x9, 0x7, 0x2, 0xC, 0x6, 0x9, 0x8, 0x5,
0x0, 0x6, 0xD, 0x1, 0x3, 0xD, 0x4, 0xE,
0xE, 0x0, 0x7, 0xB, 0x5, 0x3, 0xB, 0x8,
0x9, 0x4, 0xE, 0x3, 0xF, 0x2, 0x5, 0xC,
0x2, 0x9, 0x8, 0x5, 0xC, 0xF, 0x3, 0xA,
0x7, 0xB, 0x0, 0xE, 0x4, 0x1, 0xA, 0x7,
0x1, 0x6, 0xD, 0x0, 0xB, 0x8, 0x6, 0xD
},
{ 0x4, 0xD, 0xB, 0x0, 0x2, 0xB, 0xE, 0x7,
0xF, 0x4, 0x0, 0x9, 0x8, 0x1, 0xD, 0xA,
0x3, 0xE, 0xC, 0x3, 0x9, 0x5, 0x7, 0xC,
0x5, 0x2, 0xA, 0xF, 0x6, 0x8, 0x1, 0x6,
0x1, 0x6, 0x4, 0xB, 0xB, 0xD, 0xD, 0x8,
0xC, 0x1, 0x3, 0x4, 0x7, 0xA, 0xE, 0x7,
0xA, 0x9, 0xF, 0x5, 0x6, 0x0, 0x8, 0xF,
0x0, 0xE, 0x5, 0x2, 0x9, 0x3, 0x2, 0xC
},
{ 0xD, 0x1, 0x2, 0xF, 0x8, 0xD, 0x4, 0x8,
0x6, 0xA, 0xF, 0x3, 0xB, 0x7, 0x1, 0x4,
0xA, 0xC, 0x9, 0x5, 0x3, 0x6, 0xE, 0xB,
0x5, 0x0, 0x0, 0xE, 0xC, 0x9, 0x7, 0x2,
0x7, 0x2, 0xB, 0x1, 0x4, 0xE, 0x1, 0x7,
0x9, 0x4, 0xC, 0xA, 0xE, 0x8, 0x2, 0xD,
0x0, 0xF, 0x6, 0xC, 0xA, 0x9, 0xD, 0x0,
0xF, 0x3, 0x3, 0x5, 0x5, 0x6, 0x8, 0xB
}
};
static const uint8_t _perm[] = {
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
};
/* Inverse PC1 table */
static const uint8_t _ipc1[] = {
8, 16, 24, 56, 52, 44, 36, 57,
7, 15, 23, 55, 51, 43, 35, 58,
6, 14, 22, 54, 50, 42, 34, 59,
5, 13, 21, 53, 49, 41, 33, 60,
4, 12, 20, 28, 48, 40, 32, 61,
3, 11, 19, 27, 47, 39, 31, 62,
2, 10, 18, 26, 46, 38, 30, 63,
1, 9, 17, 25, 45, 37, 29, 64
};
static const uint8_t _pc2[] = {
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
};
/* Triple DES key map table */
static const uint8_t _tdesmap[4][2] = {
{ 0x00, 0x01 }, /* Index C */
{ 0x01, 0x02 }, /* Index D */
{ 0x02, 0x03 }, /* Index E */
{ 0x03, 0x00 } /* Index F */
};
static const uint8_t _lshift[] = {
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
static uint8_t flag = 0;
static void _permute_ec(uint8_t *data, const uint8_t *pr, int n)
{
uint8_t pin[8];
int i, j, k, t;
for(i = 0, k = 0; k < n; i++)
{
int p = 0;
for(j = 7; j >= 0; j--, k++)
{
t = pr[k] - 1;
p = (p << 1) + ((data[t >> 3]) >> (7 - (t & 7)) & 1);
}
pin[i] = p;
}
memcpy(data, pin, 8);
}
uint16_t _get_ec_date(const char *dtm, int mode)
{
int day, mon, year;
uint16_t date;
sscanf(dtm, "%d/%d/%d", &day, &mon, &year);
/* EC-M and EC-S2/3DES have different date byte structures */
if(mode == EC_M)
{
date = (year - 1980) << 9; /* Year - first 7 bits */
date |= mon << 5; /* Month - next 4 bits */
date |= day << 0; /* Day - next 5 bits */
}
else
{
date = (year - 1990) << 12; /* Year - first 4 bits */
date |= mon << 8; /* Month - next 4 bits */
date |= day << 0; /* Day - 8 bits */
}
return (date);
}
static uint64_t _ec_des_f(uint64_t r, uint8_t *k2)
{
int i, k;
uint64_t s = 0, result = 0;
for(i = 0, k = 0; i < 8; i++)
{
int j;
uint8_t v = 0;
/* The expansion E (R1) */
for(j = 0; j < 6; j++, k++)
{
v |= (r >> (32 - _exp[k]) & 1) << (5 - j);
}
/* Create R2 */
v ^= k2[i];
/* The S-boxes */
s |= (uint64_t) _sb[i][v] << (28 - 4 * i);
}
/* The permutation P (R3) */
for(i = 0; i < 32; i++)
{
result |= (s >> (32 - _perm[i]) & 1) << (31 - i);
}
return(result);
}
static void _key_rotate_ec(uint64_t *c, uint64_t *d, int dir, int iter)
{
int i;
/* Rotate left (decryption) */
if(dir == ROTATE_LEFT)
{
for(i = 0; i < _lshift[iter]; i++)
{
*c = ((*c << 1) ^ (*c >> 27)) & 0xFFFFFFFL;
*d = ((*d << 1) ^ (*d >> 27)) & 0xFFFFFFFL;
}
}
/* Rotate right (encryption) */
else
{
for(i = 0; i < _lshift[15 - iter]; i++)
{
*c = ((*c >> 1) ^ (*c << 27)) & 0xFFFFFFFL;
*d = ((*d >> 1) ^ (*d << 27)) & 0xFFFFFFFL;
}
}
}
static void _key_exp(uint64_t *c, uint64_t *d, uint8_t *k2)
{
int j, k;
/* Key expansion */
for(j = 0, k = 0; j < 8; j++)
{
int t;
k2[j] = 0;
for(t = 0; t < 6; t++, k++)
{
if(_pc2[k] < 29)
{
k2[j] |= (*c >> (28 - _pc2[k]) & 1) << (5 - t);
}
else
{
k2[j] |= (*d >> (56 - _pc2[k]) & 1) << (5 - t);
}
}
}
}
static void _eurocrypt(uint8_t *data, const uint8_t *key, int desmode, int emode, int rnd)
{
int i;
uint64_t r, l, c, d, s;
/* Key preparation. Split key into two halves */
c = ((uint64_t) key[0] << 20)
^ ((uint64_t) key[1] << 12)
^ ((uint64_t) key[2] << 4)
^ ((uint64_t) key[3] >> 4);
d = ((uint64_t) (key[3] & 0x0F) << 24)
^ ((uint64_t) key[4] << 16)
^ ((uint64_t) key[5] << 8)
^ ((uint64_t) key[6] << 0);
/* Initial permutation for Eurocrypt S2/3DES - always do this */
if(emode != EC_M)
{
_permute_ec(data, _ip, 64);
}
/* Control word preparation. Split CW into two halves. */
for(i = 3, l = 0, r = 0; i >= 0; i--)
{
l ^= (uint64_t) data[3 - i] << (8 * i);
r ^= (uint64_t) data[7 - i] << (8 * i);
}
/* 16 iterations */
for(i = 0; i < 16; i++)
{
uint64_t r3;
uint8_t k2[8];
switch (emode) {
/* If mode is not valid, abort -- this is a bug! */
default:
fprintf(stderr, "_eurocrypt: BUG: invalid encryption mode!!!\n");
assert(0);
break;
/* EC-M */
case EC_M:
{
if(desmode == HASH)
{
_key_rotate_ec(&c, &d, ROTATE_LEFT, i);
}
/* Key expansion */
_key_exp(&c, &d, k2);
/* One DES round */
s = _ec_des_f(r, k2);
if(desmode != HASH)
{
_key_rotate_ec(&c, &d, ROTATE_RIGHT, i);
}
/* Swap first two bytes if it's a hash routine */
if(desmode == HASH)
{
s = ((s >> 8) & 0xFF0000L) | ((s << 8) & 0xFF000000L) | (s & 0x0000FFFFL);
}
}
break;
/* EC-S2 */
case EC_S:
{
/* Key rotation */
_key_rotate_ec(&c, &d, ROTATE_LEFT, i);
/* Key expansion */
_key_exp(&c, &d, k2);
/* One DES round */
s = _ec_des_f(r, k2);
}
break;
/* EC-3DES */
case EC_3DES:
{
/* Key rotation */
if(rnd != 2)
{
_key_rotate_ec(&c, &d, ROTATE_LEFT, i);
}
/* Key expansion */
_key_exp(&c, &d, k2);
/* One DES round */
s = _ec_des_f(r, k2);
if(rnd == 2)
{
_key_rotate_ec(&c, &d, ROTATE_RIGHT, i);
}
}
break;
}
/* Rotate halves around */
r3 = l ^ s;
l = r;
r = r3;
}
/* Put everything together */
for(i = 3; i >= 0; i--)
{
data[3 - i] = r >> (8 * i);
data[7 - i] = l >> (8 * i);
}
/* Final permutation for Eurocrypt S2/3DES */
if(emode != EC_M)
{
_permute_ec(data, _ipp, 64);
}
}
static void _calc_ec_hash(uint8_t *hash, uint8_t *msg, int mode, int msglen, const uint8_t *key)
{
int i, r;
/* Iterate through data */
for(i = 0; i < msglen; i++)
{
hash[(i % 8)] ^= msg[i];
if(i % 8 == 7)
{
/* Three rounds for 3DES mode, one round for others */
for(r = 0; r < (mode != EC_3DES ? 1 : 3); r++)
{
/* Use second key on second round in 3DES */
_eurocrypt(hash, key + (r != 1 ? 0 : 7), HASH, mode, r + 1);
}
}
}
/* Final interation - EC-M only */
if(mode == EC_M)
{
_eurocrypt(hash, key, HASH, mode, 1);
}
}
static void _build_ecm_hash_data(uint8_t *hash, const eurocrypt_t *e, int x)
{
uint8_t msg[MAC_PAYLOAD_BYTES];
int msglen;
/* Clear hash memory */
memset(hash, 0, 8);
/* Build the hash message */
msglen = 0;
/* EC-S2 and EC-3DES */
if(e->mode->emode != EC_M)
{
/* Copy PPID */
memcpy(msg, e->ecm_pkt + 5, 3);
msglen += 3;
/* Third byte of PPUA contains key index, which needs to be masked for hashing */
msg[2] &= 0xF0;
/* Copy E1 04 data + 0xEA */
memcpy(msg + msglen, e->ecm_pkt + (x - 24), 5);
msglen += 5;
/* Copy CWs */
memcpy(msg + msglen, e->ecw[0], 8); msglen += 8;
memcpy(msg + msglen, e->ecw[1], 8); msglen += 8;
}
else
{
/* EC-M */
memcpy(msg, e->ecm_pkt + 8, x - 10);
msglen += x - 10;
}
/* Calculate hash */
_calc_ec_hash(hash, msg, e->mode->emode, msglen, e->mode->key);
}
static void _build_emmg_hash_data(uint8_t *hash, eurocrypt_t *e, int x)
{
uint8_t msg[MAC_PAYLOAD_BYTES];
int msglen;
/* Clear hash memory */
memset(hash, 0, 8);
/* Build the hash data */
msglen = 0;
/* Copy entitlements into data buffer */
memcpy(msg, e->emmg_pkt + 8, x); msglen += x - 10;
_calc_ec_hash(hash, msg, e->mode->emode, msglen, e->emmode->key);
}
static void _build_emms_hash_data(uint8_t *hash, eurocrypt_t *e)
{
uint8_t msg[MAC_PAYLOAD_BYTES];
int msglen;
/* Clear hash memory */
memset(hash, 0, 8);
/* Build the hash data */
msglen = 0;
if(e->emmode->emode == EC_M)
{
/* Copy card's Shared Address into hash buffer */
hash[5] = e->emmode->sa[2];
hash[6] = e->emmode->sa[1];
hash[7] = e->emmode->sa[0];
/* Do the initial hashing of the buffer */
_eurocrypt(hash, e->emmode->key, HASH, e->mode->emode, 1);
/* Copy ADF into data buffer */
msg[msglen++] = 0x9e;
msg[msglen++] = 0x20;
memcpy(msg + msglen, e->emms_pkt + 6, 32); msglen += 32;
/* Hash it */
_calc_ec_hash(hash, msg, e->mode->emode, msglen, e->emmode->key);
msglen = 0;
/* Copy entitlements into data buffer */
memcpy(msg + msglen, e->emmg_pkt + 8, 15); msglen += 15;
}
else
{
/* Copy ADF into data buffer */
memcpy(msg + msglen, e->emms_pkt + 6, 35); msglen += 35;
memset(msg + msglen, 0xFF, 5); msglen += 5;
}
/* Final hash */
_calc_ec_hash(hash, msg, e->emmode->emode, msglen, e->emmode->key);
}
char *_get_sub_date(int b, const char *date)
{
const int months[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int d, m, y;
char *dtm;
dtm = malloc(sizeof(char) * 24);
time_t t = time(NULL);
struct tm tm = *localtime(&t);
m = tm.tm_mon + 1;
y = tm.tm_year + 1900;
if(strcmp(date, "today") != 0)
{
sscanf(date, "%d/%d/%d", &d, &m, &y);
}
switch(b)
{
/* Today's day */
case 0:
d = tm.tm_mday;
break;
/* Last day in a month */
case 31:
d = months[m - 1];
break;
/* Default to passed value */
default:
d = b > 0 && b <= 31 ? b : 1;
break;
}
sprintf(dtm, "\n%02d/%02d/%02d\n", d, m, y);
return (dtm);
}
static void _encrypt_opkey(uint8_t *data, eurocrypt_t *e, int t)
{
int r;
uint8_t *emm = malloc(sizeof(e->mode->key) / sizeof(uint8_t));
memset(emm, 0, 8);
/* Pick the right key */
if(e->mode->emode == EC_3DES)
{
memcpy(emm, e->mode->key + (t ? 7 : 0), 7);
}
else
{
memcpy(emm, e->mode->key, 8);
}
/* Do inverse permuted choice permutation for EC-S2/3DES keys */
if(e->emmode->emode != EC_M)
{
_permute_ec(emm, _ipc1, 64);
}
/* Three rounds for 3DES mode, one round for others */
for(r = 0; r < (e->emmode->emode != EC_3DES ? 1 : 3); r++)
{
/* Use second key on second round in 3DES */
_eurocrypt(emm, e->emmode->key + (r != 1 ? 0 : 7), ECM, e->emmode->emode, r + 1);
}
memcpy(data, emm, 8);
}
static void _encrypt_date(uint8_t *outdata, eurocrypt_t *e, uint8_t indata[8])
{
int r;
/* Three rounds for 3DES mode, one round for others */
for(r = 0; r < (e->emmode->emode != EC_3DES ? 1 : 3); r++)
{
/* Use second key on second round in 3DES */
_eurocrypt(indata, e->emmode->key + (r != 1 ? 0 : 7), ECM, e->emmode->emode, r + 1);
}
memcpy(outdata, indata, 8);
}
static uint8_t _update_ecm_packet(eurocrypt_t *e, int t, int m, char *ppv)
{
int x;
uint16_t b;
uint8_t *pkt = e->ecm_pkt;
memset(pkt, 0, MAC_PAYLOAD_BYTES * 2);
/* PT - always 0x00 for ECM */
x = 0;
pkt[x++] = ECM;
/* Command Identifier, CI */
b = (e->mode->cmode & 0x30) << 2; /* Crypto-algo type */
b |= 1 << 1; /* Format bit - always 1 */
b |= t << 0; /* Toggle bit */
pkt[x++] = b;
/* Command Length Indicator, CLI -- updated later */
pkt[x++] = 0;
/* PPID */
pkt[x++] = 0x90; /* PI */
pkt[x++] = 0x03; /* LI */
memcpy(&pkt[x], e->mode->ppid, 3); x += 3;
/* Undocumented meaning of this byte but appears to be padding */
pkt[x++] = 0xDF; /* PI */
pkt[x++] = 0x00; /* LI */
if(m && e->mode->emode == EC_M)
{
/* CTRL */
pkt[x++] = 0xE0;
pkt[x++] = 0x01;
b = 1 << 6;
b |= m;
pkt[x++] = b;
}
if(ppv != NULL)
{
uint32_t ppvi[2] = { 0, 0 };
int i = 0;
char tokens[0x7F];
strcpy(tokens, ppv);
char *ptr = strtok(tokens, ",");
while(ptr != NULL)
{
ppvi[i++] = (uint32_t) atof(ptr);
ptr = strtok(NULL, ",");
}
pkt[x++] = 0xE4;
pkt[x++] = 0x05;
pkt[x++] = (ppvi[0] >> 16) & 0xFF;
pkt[x++] = (ppvi[0] >> 8) & 0xFF;
pkt[x++] = (ppvi[0] >> 0) & 0xFF;
pkt[x++] = ppvi[1] & 0xFF;
pkt[x++] = 0x00;
}
else
{
/* CDATE + THEME/LEVEL */
pkt[x++] = 0xE1; /* PI */
pkt[x++] = 0x04; /* LI */
uint16_t d = _get_ec_date(strcmp(e->mode->date, "today") == 0 ? _get_sub_date(0, e->mode->date) : e->mode->date, e->mode->emode);
pkt[x++] = (d & 0xFF00) >> 8;
pkt[x++] = (d & 0x00FF) >> 0;
memcpy(&pkt[x], e->mode->theme, 2); x += 2;
}
/* ECW/OCW */
pkt[x++] = 0xEA; /* PI */
pkt[x++] = 0x10; /* LI */
memcpy(&pkt[x], e->ecw[0], 8); x += 8; /* ECW */
memcpy(&pkt[x], e->ecw[1], 8); x += 8; /* OCW */
/* HASH */
pkt[x++] = 0xF0; /* PI */
pkt[x++] = 0x08; /* LI */
_build_ecm_hash_data(&pkt[x], e, x); x += 8;
memcpy(e->ecm_hash, &pkt[x - 8], 8);
/* Update the CI command length */
pkt[2] = x - 3;
return (x / ECM_PAYLOAD_BYTES);
}
static void _build_emmu_hash_data(uint8_t *hash, eurocrypt_t *e, int x)
{
uint8_t msg[MAC_PAYLOAD_BYTES];
int msglen;
/* Clear hash memory */
memset(hash, 0, 8);
memset(msg, 0, MAC_PAYLOAD_BYTES);
/* Build the hash data */
msglen = 0;
/* Copy provider ID into data buffer */
memcpy(msg + msglen, e->emmode->ppid, 3); msglen += 3;
/* Copy LABEL + 1 byte into data buffer */
memcpy(msg + msglen, e->emmu_pkt + 15, 0x0C); msglen += 0x0C;
/* Copy "what to do" byte */
memcpy(msg + msglen, e->emmu_pkt + 40, 0x01); msglen += 0x01;
/* Copy key */
memcpy(msg + msglen, e->emmu_pkt + 28, 0x06); msglen += 0x06;
memcpy(msg + msglen, e->emmu_pkt + 38, 0x02); msglen += 0x02;
_calc_ec_hash(hash, msg, e->emmode->emode, msglen, e->emmode->key);
}
static uint8_t _update_emmu_packet(eurocrypt_t *e, int t)
{
int i, x;
uint16_t b;
uint8_t *pkt = e->emmu_pkt;
memset(pkt, 0, MAC_PAYLOAD_BYTES * 2);
/* Packet Type */
x = 0;
pkt[x++] = 0;
/* Unique Address - reversed */
memcpy(&pkt[x], e->emmode->ua, 5); x += 5;
/* Command Identifier, CI */
b = (e->emmode->cmode & 0x30) << 2; /* Crypto-algo type */
b |= 1 << 1; /* Format bit - 0: fixed, 1: variable */
b |= 1 << 0; /* 1 */
pkt[x++] = b;
/* Command Length Indicator, CLI -- updated later */
pkt[x++] = 0;
/* PPID */
pkt[x++] = 0x90; /* PI */
pkt[x++] = 0x03; /* LI */
/* Provider ID and op-key to use */
memcpy(&pkt[x], e->emmode->ppid, 3); x += 3;
/* LABEL string - always included */
pkt[x++] = 0xA7;
pkt[x++] = 0x0B;
memset(&pkt[x], 0x20, 0x0B);
i = (int) (strchr(e->mode->channame, '(') - e->mode->channame);
strncpy((char *) &pkt[x], e->mode->channame, i > 1 ? i - 1 : 0x0B);
x += 0x0B;
/* CLE - key */
pkt[x++] = 0xEF;
pkt[x++] = 0x06;
if(++flag % 3 == 0)
{
uint8_t data[8];
uint16_t d;
/* Date/theme */
d = _get_ec_date(_get_sub_date(1, e->mode->date), e->emmode->emode);
data[0] = (d & 0xFF00) >> 8;
data[1] = (d & 0x00FF) >> 0;
d = _get_ec_date(_get_sub_date(31, e->mode->date), e->emmode->emode);
data[2] = (d & 0xFF00) >> 8;
data[3] = (d & 0x00FF) >> 0;
/* Theme/level */
memcpy(&data[4], e->mode->theme, 2);
/* Padding */
data[6] = 0x00;
data[7] = 0x00;
/* Date is encrypted in S2 mode */
_encrypt_date(e->enc_data, e, data);
}
else
{
_encrypt_opkey(e->enc_data, e, t);
}
memcpy(&pkt[x], e->enc_data, 6); x += 6;
/* Padding */
pkt[x++] = 0xDF;
pkt[x++] = 0x00;
/* EMM hash */
pkt[x++] = 0xF0;
pkt[x++] = 0x08;
memcpy(&pkt[x], e->enc_data + 6, 2); x += 2;
/* Action byte */
/*
01/02: dates (also writes label)
10: first 8-bytes for label
11: last 3 bytes for label
2x: update key, where x is key number
30: update issuer key 0
31: update issuer key 1
40: write "CA" byte in 10 02 CA >20<
50: write prov-id
*/
/* ID to use and update */
if(flag % 3 == 0)
{
b = 0x02; /* Update date */
}
else
{
b = 0x20; /* Update key */
/* Index to update */
if(e->emmode->emode == EC_3DES && e->emmode->cmode == EC_3DES)
{
b |= _tdesmap[(e->mode->ppid[2] & 0x0F) - 0x0C][t];
}
else
{
b |= e->mode->ppid[2] & 0x0F;
}
}
pkt[x++] = b;
_build_emmu_hash_data(&pkt[x], e, x);
memcpy(e->emm_hash, &pkt[x], 8);
memcpy(&pkt[x], e->emm_hash + 3, 5); x += 5;
/* Update the CI command length */
pkt[7] = x - 8;
return(x / ECM_PAYLOAD_BYTES);
}
static void _update_emms_packet(eurocrypt_t *e, int t)
{
int x;
uint16_t b;
uint8_t *pkt = e->emms_pkt;
memset(pkt, 0, MAC_PAYLOAD_BYTES);
x = 0;
/* Packet Type */
pkt[x++] = EMMS;
/* Shared Address - reversed */
memcpy(&pkt[x], e->emmode->sa, 3); x += 3;
/* Command Identifier, CI */
b = (e->emmode->cmode & 0x30) << 2; /* Crypto-algo type */
b |= 0 << 1; /* Format bit - 0: fixed, 1: variable */
b |= 0 << 0; /* ADF - clear */
pkt[x++] = b;
/* Command Length Indicator, CLI */
pkt[x++] = 0x28;
/* ADF */
memset(&pkt[x], 0xFF, 32); x += 32;
if(e->emmode->emode == EC_M)
{
/* EMM hash */
_build_emms_hash_data(&pkt[x], e); x += 8;
memcpy(e->emm_hash, &pkt[x - 8], 8);
}
else
{
x -= 7;
/* ID to use and update */
if(++flag % 3 == 0)
{
b = 0x02; /* Update date */
}
else
{
b = 0x20; /* Update key */
}