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hdcp_cipher.c
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hdcp_cipher.c
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/************************************************************
* A bit-sliced implementation of the HDCP authentication protocol.
*
* This software is released under the FreeBSD license.
* Copyright Rob Johnson and Mikhail Rubnich.
************************************************************/
#define __STDC_FORMAT_MACROS /* Get the PRI* macros */
#include <stdio.h>
#include <string.h>
#include "hdcp_cipher.h"
#include "bitslice.h"
#define BS_LFSRBit(r,i) ((r)->state[((r)->zero + i) % (r)->len])
#define BS_LFSRMTap(m,i,j) (BS_LFSRBit(&(m)->lfsrs[i], (m)->lfsrs[i].taps[j]))
void BS_LFSR(BS_LFSReg * r)
{
bsvec_t newbit;
int i;
newbit = 0;
for (i = 0; i < 6 && r->feedbacks[i] >= 0; i++)
newbit ^= BS_LFSRBit(r, r->feedbacks[i]);
r->zero--;
if (r->zero < 0)
r->zero = r->len - 1;
BS_LFSRBit(r, 0) = newbit;
}
bsvec_t BS_ShuffleNetwork(bsvec_t *A, bsvec_t *B,
bsvec_t D, bsvec_t S)
{
bsvec_t result, oldA;
result = ((~S) & *A) | (S & *B);
oldA = *A;
*A = ((~S) & *B) | (S & D);
*B = ((~S) & D) | (S & oldA);
return result;
}
void BS_LFSRModule_print(BS_LFSRModule *m, int which)
{
bsvec_t reg;
int i, j;
for (i = 0; i < 4; i++) {
reg = 0;
for (j = 0; j < m->lfsrs[i].len; j++)
reg |= ((BS_LFSRBit(&m->lfsrs[i], j) & (UINT64_C(1) << which)) ? UINT64_C(1) : UINT64_C(0)) << j;
printf("%0*" PRIx64 " ", (m->lfsrs[i].len + 3) / 4, reg);
}
for (i = 0; i < 4; i++)
printf("%1" PRIx64 "%1" PRIx64 " ", (m->snA[i] >> which) & UINT64_C(1), (m->snB[i] >> which) & UINT64_C(1));
}
void BS_LFSRModule_init(BS_LFSRModule *m, bsvec_t input[56])
{
int i;
memset(m, 0, sizeof(*m));
memset(m->snB, 0xff, sizeof(m->snB));
m->lfsrs[0] = (BS_LFSReg) { { 3, 7, 12}, /* taps */
{ 4, 8, 10, 12, -1 }, /* feedbacks */
0, /* zero */
13, /* len */
{ 0 } /* state */
};
m->lfsrs[1] = (BS_LFSReg) { { 4, 8, 13}, /* taps */
{ 3, 5, 6, 9, 10, 13}, /* feedbacks */
0, /* zero */
14, /* len */
{ 0 } /* state */
};
m->lfsrs[2] = (BS_LFSReg) { { 5, 9, 15}, /* taps */
{ 4, 6, 7, 11, 14, 15}, /* feedbacks */
0, /* zero */
16, /* len */
{ 0 } /* state */
};
m->lfsrs[3] = (BS_LFSReg) { { 5, 11, 16}, /* taps */
{ 4, 10, 14, 16, -1}, /* feedbacks */
0, /* zero */
17, /* len */
{ 0 } /* state */
};
for (i = 0; i < 12; i++)
BS_LFSRBit(&m->lfsrs[0], i) = input[i];
BS_LFSRBit(&m->lfsrs[0], 12) = ~input[6];
for (i = 0; i < 13; i++)
BS_LFSRBit(&m->lfsrs[1], i) = input[i+12];
BS_LFSRBit(&m->lfsrs[1], 13) = ~input[18];
for (i = 0; i < 15; i++)
BS_LFSRBit(&m->lfsrs[2], i) = input[i+25];
BS_LFSRBit(&m->lfsrs[2], 15) = ~input[32];
for (i = 0; i < 16; i++)
BS_LFSRBit(&m->lfsrs[3], i) = input[i+40];
BS_LFSRBit(&m->lfsrs[3], 16) = ~input[47];
}
bsvec_t BS_LFSRModule_clock(BS_LFSRModule * m)
{
bsvec_t D;
int i;
D = 0;
for (i = 0; i < 4; i++)
D ^= BS_LFSRMTap(m, i, 0);
for (i = 0; i < 4; i++)
D = BS_ShuffleNetwork(&m->snA[i], &m->snB[i], D, BS_LFSRMTap(m, i, 1));
for (i = 0; i < 4; i++)
D ^= BS_LFSRMTap(m, i, 2);
for (i = 0; i < 4; i++)
BS_LFSR(&m->lfsrs[i]);
return D;
}
/* A slow and easy-to-read version */
#define KI(i,j) (Kzmap[i][j] ? Kz[KImap[i][j]] : Ky[KImap[i][j]])
#define KO(i,j) (*(j == 0 || j > 4 ? &Kx[KOmap[i][j]] : &Ky[KOmap[i][j]]))
void BS_DiffuseNetworkK_ (bsvec_t Kz[28], bsvec_t Ky[28], bsvec_t Kx[28])
{
static const char Kzmap[7][8] = { { 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1}
};
static const unsigned char KImap[7][8] = { { 0, 7, 10, 13, 16, 16, 20, 24},
{ 1, 8, 11, 14, 17, 17, 21, 25},
{ 2, 9, 12, 15, 18, 18, 22, 26},
{ 3, 0, 3, 6, 9, 19, 23, 27},
{ 4, 1, 4, 7, 10, 19, 22, 25},
{ 5, 2, 5, 8, 11, 20, 23, 26},
{ 6, 12, 13, 14, 15, 21, 24, 27}
};
static const unsigned char KOmap[7][8] = { { 0, 0, 1, 2, 3, 1, 2, 3},
{ 4, 4, 5, 6, 7, 5, 6, 7},
{ 8, 8, 9, 10, 11, 9, 10, 11},
{ 12, 12, 13, 14, 15, 13, 14, 15},
{ 16, 16, 17, 18, 19, 17, 18, 19},
{ 20, 20, 21, 22, 23, 21, 22, 23},
{ 24, 24, 25, 26, 27, 25, 26, 27}
};
bsvec_t I[7][8], O[7][8];
int i, j;
for (i = 0; i < 7; i++)
for (j = 0; j < 8; j++)
I[i][j] = KI(i,j);
for (j = 0; j < 8; j++) {
O[6][j] = I[0][j];
for (i = 1; i < 7; i++)
O[6][j] ^= I[i][j];
}
for (i = 0; i < 6; i++)
for (j = 0; j < 8; j++)
KO(i,j) = O[6][j] ^ I[i][j];
for (j = 0; j < 8; j++)
KO(6,j) = O[6][j];
}
//#define KI(i,j) (Kzmap[i][j] ? Kz[KImap[i][j]] : Ky[KImap[i][j]])
//#define KO(i,j) (*(j == 0 || j > 4 ? &Kx[KOmap[i][j]] : &Ky[KOmap[i][j]]))
void BS_DiffuseNetworkK_print (void)
{
static const char Kzmap[7][8] = { { 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1}
};
static const unsigned char KImap[7][8] = { { 0, 7, 10, 13, 16, 16, 20, 24},
{ 1, 8, 11, 14, 17, 17, 21, 25},
{ 2, 9, 12, 15, 18, 18, 22, 26},
{ 3, 0, 3, 6, 9, 19, 23, 27},
{ 4, 1, 4, 7, 10, 19, 22, 25},
{ 5, 2, 5, 8, 11, 20, 23, 26},
{ 6, 12, 13, 14, 15, 21, 24, 27}
};
static const unsigned char KOmap[7][8] = { { 0, 0, 1, 2, 3, 1, 2, 3},
{ 4, 4, 5, 6, 7, 5, 6, 7},
{ 8, 8, 9, 10, 11, 9, 10, 11},
{ 12, 12, 13, 14, 15, 13, 14, 15},
{ 16, 16, 17, 18, 19, 17, 18, 19},
{ 20, 20, 21, 22, 23, 21, 22, 23},
{ 24, 24, 25, 26, 27, 25, 26, 27}
};
int i, j;
printf("/* Auto-generated by BS_DiffuseNetworkK_print */\n"
"void BS_DiffuseNetworkK (bsvec_t Kz[28], bsvec_t Ky[28], bsvec_t Kx[28])\n"
"{\n"
"bsvec_t I[7][8], O[7][8];\n"
"\n");
for (i = 0; i < 7; i++)
for (j = 0; j < 8; j++)
printf(" I[%d][%d] = %s[%d];\n", i, j, Kzmap[i][j] ? "Kz" : "Ky", KImap[i][j]);
printf("\n");
for (j = 0; j < 8; j++) {
printf(" O[6][%d] = I[0][%d];\n", j, j);
for (i = 1; i < 7; i++)
printf(" O[6][%d] ^= I[%d][%d];\n", j, i, j);
}
printf("\n");
for (i = 0; i < 6; i++)
for (j = 0; j < 8; j++)
printf(" %s[%d] = O[6][%d] ^ I[%d][%d];\n", j == 0 || j > 4 ? "Kx" : "Ky", KOmap[i][j], j, i, j);
printf("\n");
for (j = 0; j < 8; j++)
printf(" %s[%d] = O[6][%d];\n", j == 0 || j > 4 ? "Kx" : "Ky", KOmap[6][j], j);
printf("\n");
printf("}\n");
}
/* Auto-generated */
void BS_DiffuseNetworkK (bsvec_t Kz[28], bsvec_t Ky[28], bsvec_t Kx[28])
{
bsvec_t I[7][8], O[7][8];
I[0][0] = Kz[0];
I[0][1] = Kz[7];
I[0][2] = Kz[10];
I[0][3] = Kz[13];
I[0][4] = Kz[16];
I[0][5] = Ky[16];
I[0][6] = Ky[20];
I[0][7] = Ky[24];
I[1][0] = Kz[1];
I[1][1] = Kz[8];
I[1][2] = Kz[11];
I[1][3] = Kz[14];
I[1][4] = Kz[17];
I[1][5] = Ky[17];
I[1][6] = Ky[21];
I[1][7] = Ky[25];
I[2][0] = Kz[2];
I[2][1] = Kz[9];
I[2][2] = Kz[12];
I[2][3] = Kz[15];
I[2][4] = Kz[18];
I[2][5] = Ky[18];
I[2][6] = Ky[22];
I[2][7] = Ky[26];
I[3][0] = Kz[3];
I[3][1] = Ky[0];
I[3][2] = Ky[3];
I[3][3] = Ky[6];
I[3][4] = Ky[9];
I[3][5] = Ky[19];
I[3][6] = Ky[23];
I[3][7] = Ky[27];
I[4][0] = Kz[4];
I[4][1] = Ky[1];
I[4][2] = Ky[4];
I[4][3] = Ky[7];
I[4][4] = Ky[10];
I[4][5] = Kz[19];
I[4][6] = Kz[22];
I[4][7] = Kz[25];
I[5][0] = Kz[5];
I[5][1] = Ky[2];
I[5][2] = Ky[5];
I[5][3] = Ky[8];
I[5][4] = Ky[11];
I[5][5] = Kz[20];
I[5][6] = Kz[23];
I[5][7] = Kz[26];
I[6][0] = Kz[6];
I[6][1] = Ky[12];
I[6][2] = Ky[13];
I[6][3] = Ky[14];
I[6][4] = Ky[15];
I[6][5] = Kz[21];
I[6][6] = Kz[24];
I[6][7] = Kz[27];
O[6][0] = I[0][0];
O[6][0] ^= I[1][0];
O[6][0] ^= I[2][0];
O[6][0] ^= I[3][0];
O[6][0] ^= I[4][0];
O[6][0] ^= I[5][0];
O[6][0] ^= I[6][0];
O[6][1] = I[0][1];
O[6][1] ^= I[1][1];
O[6][1] ^= I[2][1];
O[6][1] ^= I[3][1];
O[6][1] ^= I[4][1];
O[6][1] ^= I[5][1];
O[6][1] ^= I[6][1];
O[6][2] = I[0][2];
O[6][2] ^= I[1][2];
O[6][2] ^= I[2][2];
O[6][2] ^= I[3][2];
O[6][2] ^= I[4][2];
O[6][2] ^= I[5][2];
O[6][2] ^= I[6][2];
O[6][3] = I[0][3];
O[6][3] ^= I[1][3];
O[6][3] ^= I[2][3];
O[6][3] ^= I[3][3];
O[6][3] ^= I[4][3];
O[6][3] ^= I[5][3];
O[6][3] ^= I[6][3];
O[6][4] = I[0][4];
O[6][4] ^= I[1][4];
O[6][4] ^= I[2][4];
O[6][4] ^= I[3][4];
O[6][4] ^= I[4][4];
O[6][4] ^= I[5][4];
O[6][4] ^= I[6][4];
O[6][5] = I[0][5];
O[6][5] ^= I[1][5];
O[6][5] ^= I[2][5];
O[6][5] ^= I[3][5];
O[6][5] ^= I[4][5];
O[6][5] ^= I[5][5];
O[6][5] ^= I[6][5];
O[6][6] = I[0][6];
O[6][6] ^= I[1][6];
O[6][6] ^= I[2][6];
O[6][6] ^= I[3][6];
O[6][6] ^= I[4][6];
O[6][6] ^= I[5][6];
O[6][6] ^= I[6][6];
O[6][7] = I[0][7];
O[6][7] ^= I[1][7];
O[6][7] ^= I[2][7];
O[6][7] ^= I[3][7];
O[6][7] ^= I[4][7];
O[6][7] ^= I[5][7];
O[6][7] ^= I[6][7];
Kx[0] = O[6][0] ^ I[0][0];
Ky[0] = O[6][1] ^ I[0][1];
Ky[1] = O[6][2] ^ I[0][2];
Ky[2] = O[6][3] ^ I[0][3];
Ky[3] = O[6][4] ^ I[0][4];
Kx[1] = O[6][5] ^ I[0][5];
Kx[2] = O[6][6] ^ I[0][6];
Kx[3] = O[6][7] ^ I[0][7];
Kx[4] = O[6][0] ^ I[1][0];
Ky[4] = O[6][1] ^ I[1][1];
Ky[5] = O[6][2] ^ I[1][2];
Ky[6] = O[6][3] ^ I[1][3];
Ky[7] = O[6][4] ^ I[1][4];
Kx[5] = O[6][5] ^ I[1][5];
Kx[6] = O[6][6] ^ I[1][6];
Kx[7] = O[6][7] ^ I[1][7];
Kx[8] = O[6][0] ^ I[2][0];
Ky[8] = O[6][1] ^ I[2][1];
Ky[9] = O[6][2] ^ I[2][2];
Ky[10] = O[6][3] ^ I[2][3];
Ky[11] = O[6][4] ^ I[2][4];
Kx[9] = O[6][5] ^ I[2][5];
Kx[10] = O[6][6] ^ I[2][6];
Kx[11] = O[6][7] ^ I[2][7];
Kx[12] = O[6][0] ^ I[3][0];
Ky[12] = O[6][1] ^ I[3][1];
Ky[13] = O[6][2] ^ I[3][2];
Ky[14] = O[6][3] ^ I[3][3];
Ky[15] = O[6][4] ^ I[3][4];
Kx[13] = O[6][5] ^ I[3][5];
Kx[14] = O[6][6] ^ I[3][6];
Kx[15] = O[6][7] ^ I[3][7];
Kx[16] = O[6][0] ^ I[4][0];
Ky[16] = O[6][1] ^ I[4][1];
Ky[17] = O[6][2] ^ I[4][2];
Ky[18] = O[6][3] ^ I[4][3];
Ky[19] = O[6][4] ^ I[4][4];
Kx[17] = O[6][5] ^ I[4][5];
Kx[18] = O[6][6] ^ I[4][6];
Kx[19] = O[6][7] ^ I[4][7];
Kx[20] = O[6][0] ^ I[5][0];
Ky[20] = O[6][1] ^ I[5][1];
Ky[21] = O[6][2] ^ I[5][2];
Ky[22] = O[6][3] ^ I[5][3];
Ky[23] = O[6][4] ^ I[5][4];
Kx[21] = O[6][5] ^ I[5][5];
Kx[22] = O[6][6] ^ I[5][6];
Kx[23] = O[6][7] ^ I[5][7];
Kx[24] = O[6][0];
Ky[24] = O[6][1];
Ky[25] = O[6][2];
Ky[26] = O[6][3];
Ky[27] = O[6][4];
Kx[25] = O[6][5];
Kx[26] = O[6][6];
Kx[27] = O[6][7];
}
/* A slow but easy-to-read version */
#define BI(i,j) (Bzmap[i][j] ? Bz[BImap[i][j]] : By[BImap[i][j]])
#define BO(i,j) (*(j == 0 || j > 4 ? &Bx[BOmap[i][j]] : &By[BOmap[i][j]]))
#define BK(i,j) (j == 0 ? Ky[i] : j < 5 ? 0 : Ky[7*(j-4) + i])
void BS_DiffuseNetworkB_ (bsvec_t Bz[28], bsvec_t By[28], bsvec_t Bx[28], bsvec_t Ky[28])
{
static const char Bzmap[7][8] = { { 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1}
};
static const unsigned char BImap[7][8] = { { 0, 7, 10, 13, 16, 16, 20, 24},
{ 1, 8, 11, 14, 17, 17, 21, 25},
{ 2, 9, 12, 15, 18, 18, 22, 26},
{ 3, 0, 3, 6, 9, 19, 23, 27},
{ 4, 1, 4, 7, 10, 19, 22, 25},
{ 5, 2, 5, 8, 11, 20, 23, 26},
{ 6, 12, 13, 14, 15, 21, 24, 27}
};
static const unsigned char BOmap[7][8] = { { 0, 0, 1, 2, 3, 1, 2, 3},
{ 4, 4, 5, 6, 7, 5, 6, 7},
{ 8, 8, 9, 10, 11, 9, 10, 11},
{ 12, 12, 13, 14, 15, 13, 14, 15},
{ 16, 16, 17, 18, 19, 17, 18, 19},
{ 20, 20, 21, 22, 23, 21, 22, 23},
{ 24, 24, 25, 26, 27, 25, 26, 27}
};
bsvec_t O[8][7];
int i, j;
for (j = 0; j < 8; j++)
for (i = 0; i < 7; i++)
O[j][i] = BI(i,j);
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
O[j][6] ^= O[j][i];
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
O[j][i] ^= O[j][6];
for (j = 0; j < 8; j++)
for (i = 0; i < 7; i++)
BO(i,j) = O[j][i] ^ BK(i,j);
}
/* Faster -- eliminate the conditionals induced by Bzmap */
void BS_DiffuseNetworkB__ (bsvec_t Bz[28], bsvec_t By[28], bsvec_t Bx[28], bsvec_t Ky[28])
{
static const unsigned char BImap[7][8] = { { 0, 7, 10, 13, 16, 16, 20, 24},
{ 1, 8, 11, 14, 17, 17, 21, 25},
{ 2, 9, 12, 15, 18, 18, 22, 26},
{ 3, 0, 3, 6, 9, 19, 23, 27},
{ 4, 1, 4, 7, 10, 19, 22, 25},
{ 5, 2, 5, 8, 11, 20, 23, 26},
{ 6, 12, 13, 14, 15, 21, 24, 27}
};
static const unsigned char BOmap[7][8] = { { 0, 0, 1, 2, 3, 1, 2, 3},
{ 4, 4, 5, 6, 7, 5, 6, 7},
{ 8, 8, 9, 10, 11, 9, 10, 11},
{ 12, 12, 13, 14, 15, 13, 14, 15},
{ 16, 16, 17, 18, 19, 17, 18, 19},
{ 20, 20, 21, 22, 23, 21, 22, 23},
{ 24, 24, 25, 26, 27, 25, 26, 27}
};
bsvec_t O[8][7];
int i, j;
for (i = 0; i < 7; i++)
O[0][i] = Bz[BImap[i][0]];
for (j = 1; j < 5; j++) {
for (i = 0; i < 3; i++)
O[j][i] = Bz[BImap[i][j]];
for (i = 3; i < 7; i++)
O[j][i] = By[BImap[i][j]];
}
for (j = 5; j < 8; j++) {
for (i = 0; i < 4; i++)
O[j][i] = By[BImap[i][j]];
for (i = 4; i < 7; i++)
O[j][i] = Bz[BImap[i][j]];
}
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
O[j][6] ^= O[j][i];
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
O[j][i] ^= O[j][6];
//#define BO(i,j) (*(j == 0 || j > 4 ? &Bx[BOmap[i][j]] : &By[BOmap[i][j]]))
//#define BK(i,j) (j == 0 ? Ky[i] : j < 5 ? 0 : Ky[7*(j-4) + i])
for (i = 0; i < 7; i++)
Bx[BOmap[i][0]] = O[0][i] ^ Ky[i];
for (j = 1; j < 5; j++)
for (i = 0; i < 7; i++)
By[BOmap[i][j]] = O[j][i];
for (j = 5; j < 8; j++)
for (i = 0; i < 7; i++)
Bx[BOmap[i][j]] = O[j][i] ^ Ky[7*(j-4)+i];
/* for (j = 5; j < 8; j++) */
/* for (i = 0; i < 7; i++) */
/* BO(i,j) = O[j][i] ^ BK(i,j); */
}
/* An auto-generated completely unrolled one. This actually generates
the smallest and fastest code in gcc. */
void BS_DiffuseNetworkB_print (void)
{
static const char Bzmap[7][8] = { { 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 1, 1, 1, 1, 0, 0, 0},
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1},
{ 1, 0, 0, 0, 0, 1, 1, 1}
};
static const unsigned char BImap[7][8] = { { 0, 7, 10, 13, 16, 16, 20, 24},
{ 1, 8, 11, 14, 17, 17, 21, 25},
{ 2, 9, 12, 15, 18, 18, 22, 26},
{ 3, 0, 3, 6, 9, 19, 23, 27},
{ 4, 1, 4, 7, 10, 19, 22, 25},
{ 5, 2, 5, 8, 11, 20, 23, 26},
{ 6, 12, 13, 14, 15, 21, 24, 27}
};
static const unsigned char BOmap[7][8] = { { 0, 0, 1, 2, 3, 1, 2, 3},
{ 4, 4, 5, 6, 7, 5, 6, 7},
{ 8, 8, 9, 10, 11, 9, 10, 11},
{ 12, 12, 13, 14, 15, 13, 14, 15},
{ 16, 16, 17, 18, 19, 17, 18, 19},
{ 20, 20, 21, 22, 23, 21, 22, 23},
{ 24, 24, 25, 26, 27, 25, 26, 27}
};
int i, j;
printf("/* Auto-generated by BS_DiffuseNetworkB_print */\n"
"void BS_DiffuseNetworkB (bsvec_t Bz[28], bsvec_t By[28], bsvec_t Bx[28], bsvec_t Ky[28])\n"
"{\n"
" bsvec_t O[8][7];\n"
"\n");
for (j = 0; j < 8; j++)
for (i = 0; i < 7; i++) {
printf(" O[%d][%d] = ", j, i); //BI(i,j);\n",
printf(" %s[%d];\n", Bzmap[i][j] ? "Bz" : "By", BImap[i][j]);
}
printf("\n");
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
printf(" O[%d][6] ^= O[%d][%d];\n", j, j, i);
printf("\n");
for (j = 0; j < 8; j++)
for (i = 0; i < 6; i++)
printf(" O[%d][%d] ^= O[%d][6];\n", j, i, j);
printf("\n");
for (j = 0; j < 8; j++)
for (i = 0; i < 7; i++) {
printf(" %s[%d] = O[%d][%d]", j == 0 || j > 4 ? "Bx" : "By", BOmap[i][j], j, i);
if (j == 0 || j >= 5)
printf("^ Ky[%d]", j == 0 ? i : 7*(j-4) + i);
printf(";\n");
}
printf("}\n");
}
/* Auto-generated */
void BS_DiffuseNetworkB (bsvec_t Bz[28], bsvec_t By[28], bsvec_t Bx[28], bsvec_t Ky[28])
{
bsvec_t O[8][7];
O[0][0] = Bz[0];
O[0][1] = Bz[1];
O[0][2] = Bz[2];
O[0][3] = Bz[3];
O[0][4] = Bz[4];
O[0][5] = Bz[5];
O[0][6] = Bz[6];
O[1][0] = Bz[7];
O[1][1] = Bz[8];
O[1][2] = Bz[9];
O[1][3] = By[0];
O[1][4] = By[1];
O[1][5] = By[2];
O[1][6] = By[12];
O[2][0] = Bz[10];
O[2][1] = Bz[11];
O[2][2] = Bz[12];
O[2][3] = By[3];
O[2][4] = By[4];
O[2][5] = By[5];
O[2][6] = By[13];
O[3][0] = Bz[13];
O[3][1] = Bz[14];
O[3][2] = Bz[15];
O[3][3] = By[6];
O[3][4] = By[7];
O[3][5] = By[8];
O[3][6] = By[14];
O[4][0] = Bz[16];
O[4][1] = Bz[17];
O[4][2] = Bz[18];
O[4][3] = By[9];
O[4][4] = By[10];
O[4][5] = By[11];
O[4][6] = By[15];
O[5][0] = By[16];
O[5][1] = By[17];
O[5][2] = By[18];
O[5][3] = By[19];
O[5][4] = Bz[19];
O[5][5] = Bz[20];
O[5][6] = Bz[21];
O[6][0] = By[20];
O[6][1] = By[21];
O[6][2] = By[22];
O[6][3] = By[23];
O[6][4] = Bz[22];
O[6][5] = Bz[23];
O[6][6] = Bz[24];
O[7][0] = By[24];
O[7][1] = By[25];
O[7][2] = By[26];
O[7][3] = By[27];
O[7][4] = Bz[25];
O[7][5] = Bz[26];
O[7][6] = Bz[27];
O[0][6] ^= O[0][0];
O[0][6] ^= O[0][1];
O[0][6] ^= O[0][2];
O[0][6] ^= O[0][3];
O[0][6] ^= O[0][4];
O[0][6] ^= O[0][5];
O[1][6] ^= O[1][0];
O[1][6] ^= O[1][1];
O[1][6] ^= O[1][2];
O[1][6] ^= O[1][3];
O[1][6] ^= O[1][4];
O[1][6] ^= O[1][5];
O[2][6] ^= O[2][0];
O[2][6] ^= O[2][1];
O[2][6] ^= O[2][2];
O[2][6] ^= O[2][3];
O[2][6] ^= O[2][4];
O[2][6] ^= O[2][5];
O[3][6] ^= O[3][0];
O[3][6] ^= O[3][1];
O[3][6] ^= O[3][2];
O[3][6] ^= O[3][3];
O[3][6] ^= O[3][4];
O[3][6] ^= O[3][5];
O[4][6] ^= O[4][0];
O[4][6] ^= O[4][1];
O[4][6] ^= O[4][2];
O[4][6] ^= O[4][3];
O[4][6] ^= O[4][4];
O[4][6] ^= O[4][5];
O[5][6] ^= O[5][0];
O[5][6] ^= O[5][1];
O[5][6] ^= O[5][2];
O[5][6] ^= O[5][3];
O[5][6] ^= O[5][4];
O[5][6] ^= O[5][5];
O[6][6] ^= O[6][0];
O[6][6] ^= O[6][1];
O[6][6] ^= O[6][2];
O[6][6] ^= O[6][3];
O[6][6] ^= O[6][4];
O[6][6] ^= O[6][5];
O[7][6] ^= O[7][0];
O[7][6] ^= O[7][1];
O[7][6] ^= O[7][2];
O[7][6] ^= O[7][3];
O[7][6] ^= O[7][4];
O[7][6] ^= O[7][5];
O[0][0] ^= O[0][6];
O[0][1] ^= O[0][6];
O[0][2] ^= O[0][6];
O[0][3] ^= O[0][6];
O[0][4] ^= O[0][6];
O[0][5] ^= O[0][6];
O[1][0] ^= O[1][6];
O[1][1] ^= O[1][6];
O[1][2] ^= O[1][6];
O[1][3] ^= O[1][6];
O[1][4] ^= O[1][6];
O[1][5] ^= O[1][6];
O[2][0] ^= O[2][6];
O[2][1] ^= O[2][6];
O[2][2] ^= O[2][6];
O[2][3] ^= O[2][6];
O[2][4] ^= O[2][6];
O[2][5] ^= O[2][6];
O[3][0] ^= O[3][6];
O[3][1] ^= O[3][6];
O[3][2] ^= O[3][6];
O[3][3] ^= O[3][6];
O[3][4] ^= O[3][6];
O[3][5] ^= O[3][6];
O[4][0] ^= O[4][6];
O[4][1] ^= O[4][6];
O[4][2] ^= O[4][6];
O[4][3] ^= O[4][6];
O[4][4] ^= O[4][6];
O[4][5] ^= O[4][6];
O[5][0] ^= O[5][6];
O[5][1] ^= O[5][6];
O[5][2] ^= O[5][6];
O[5][3] ^= O[5][6];
O[5][4] ^= O[5][6];
O[5][5] ^= O[5][6];
O[6][0] ^= O[6][6];
O[6][1] ^= O[6][6];
O[6][2] ^= O[6][6];
O[6][3] ^= O[6][6];
O[6][4] ^= O[6][6];
O[6][5] ^= O[6][6];
O[7][0] ^= O[7][6];
O[7][1] ^= O[7][6];
O[7][2] ^= O[7][6];
O[7][3] ^= O[7][6];
O[7][4] ^= O[7][6];
O[7][5] ^= O[7][6];
Bx[0] = O[0][0]^ Ky[0];
Bx[4] = O[0][1]^ Ky[1];
Bx[8] = O[0][2]^ Ky[2];
Bx[12] = O[0][3]^ Ky[3];
Bx[16] = O[0][4]^ Ky[4];
Bx[20] = O[0][5]^ Ky[5];
Bx[24] = O[0][6]^ Ky[6];
By[0] = O[1][0];
By[4] = O[1][1];
By[8] = O[1][2];
By[12] = O[1][3];
By[16] = O[1][4];
By[20] = O[1][5];
By[24] = O[1][6];
By[1] = O[2][0];
By[5] = O[2][1];
By[9] = O[2][2];
By[13] = O[2][3];
By[17] = O[2][4];
By[21] = O[2][5];
By[25] = O[2][6];
By[2] = O[3][0];
By[6] = O[3][1];
By[10] = O[3][2];
By[14] = O[3][3];
By[18] = O[3][4];
By[22] = O[3][5];
By[26] = O[3][6];
By[3] = O[4][0];
By[7] = O[4][1];
By[11] = O[4][2];
By[15] = O[4][3];
By[19] = O[4][4];
By[23] = O[4][5];
By[27] = O[4][6];
Bx[1] = O[5][0]^ Ky[7];
Bx[5] = O[5][1]^ Ky[8];
Bx[9] = O[5][2]^ Ky[9];
Bx[13] = O[5][3]^ Ky[10];
Bx[17] = O[5][4]^ Ky[11];
Bx[21] = O[5][5]^ Ky[12];
Bx[25] = O[5][6]^ Ky[13];
Bx[2] = O[6][0]^ Ky[14];
Bx[6] = O[6][1]^ Ky[15];
Bx[10] = O[6][2]^ Ky[16];
Bx[14] = O[6][3]^ Ky[17];
Bx[18] = O[6][4]^ Ky[18];
Bx[22] = O[6][5]^ Ky[19];
Bx[26] = O[6][6]^ Ky[20];
Bx[3] = O[7][0]^ Ky[21];
Bx[7] = O[7][1]^ Ky[22];
Bx[11] = O[7][2]^ Ky[23];
Bx[15] = O[7][3]^ Ky[24];
Bx[19] = O[7][4]^ Ky[25];
Bx[23] = O[7][5]^ Ky[26];
Bx[27] = O[7][6]^ Ky[27];
}
#define LOADINPUTS(i) D = input[i]; C = input[i + 7]; \
B = input[i + 14]; A = input[i + 21];
void BS_SBoxB(bsvec_t input[28], bsvec_t output[28])
{
bsvec_t A, B, C, D;
LOADINPUTS(0);
output[0] = (~A&((C^D) | (B&~C))) | (A&~B&C&D) | (B&(C^D));
output[7] = (C&((~B&~D) | (A&D))) | (B&D&(C|A)) |(~D&((A&~B)|(~A&B&~C)));
output[14] = (C&(A^B))|(D&((A&~C)|(~A&B)))|(~A&~B&~C&~D);
output[21] = (B&((A&D)|(~C&~D))) | (~A&((B&~D)|(~B&~C))) | (A&~B&C&~D);
LOADINPUTS(1);
output[1] = (~A&(~(C^D) | (B&~D))) | (A&((~B&C) | (B&~C&D)));
output[8] = ((~A&C&~D) | (B&~C&D) ) | (~C&((A&B)|(~B&~D))) | (A&~B&C&D);
output[15] = (A&(B^D))|(B&~C&(A|~D))|(~A&C&~(B^D));
output[22] = (C&(~D|(~A&B)))|(~B&((A&~D)|(~A&~C&D))) | (A&B&~C&D);
LOADINPUTS(2);
output[2] = (~A&~(B^D)) | (A&~B&~C&D) | (B&~(A^C));
output[9] = ((~A&C&D)|(B&~C&~D))|(~A&~D&(B|~C))|(A&~B&(C^D));
output[16] = (~C&(~B|(~A&D)))|(A&((~B&~D)|(B&C&D)))|(~A&B&C&~D);
output[23] = (B&(C^D))|(~C&(A^B))|(~A&~B&C&D);
LOADINPUTS(3);
output[3] = (~A&~B&~C&D) | ((A^C)&~D) | (A&~(B^D));
output[10] = ((~A&B&C)|(A&~C&D))|(~A&~C&(~D|~B))|(A&~B&C&~D);
output[17] = (B&D&(A|~C))|(~B&~C&(A|~D))|(~A&C&(B^D));
output[24] = (A&C&(~B|D))|((A&~B&D)|(B&~C&~D)) |(~A&B&(~D|~C));
LOADINPUTS(4);
output[4] = (~C&~(B^D)) | ((A^C)&~D) | (A&~B&C&D);
output[11] = (C&((A&~B)|(B&D)))|(~A&~B&(~D|~C)) | (A&B&~C&~D);
output[18] = (~B&C&(D|~A)) | (D&~(A^B)) |(~C&~D&(A^B));
output[25] = (C&~D&(~A|~B))|((~A&~B&C)|(A&~C&D)) |(A&B&(D|~C));
LOADINPUTS(5);
output[5] = (~(A^C)&~D) | ((A^C)&B&D) | (~B&((A&C) | (~C&~D)));
output[12] = ((A&~B&C)|(~A&B&D))|(~A&~B&(~D|~C))|(A&B&~C&~D);
output[19] = (C&((~B&~D)|(~A&B))) | (~C&D&(A|~B))|(~A&B&~D);
output[26] = (C&~D&(A|B))|((~A&~B&D)|(A&B&~C))|(~A&~B&~C);
LOADINPUTS(6);
output[6] = (~A&~(B^D)) | (A&C&(B^D)) | (~B&((~A&~C) | (~C&~D)));
output[13] = (A&((B&C)|(~B&D)))|(~C&(B^D))|(~A&~B&C&~D);
output[20] = (~A&C&(~D|~B))|(A&((~B&D)|(~C&~D))) | (~A&B&~C&D);
output[27] = (C&((A&D)|(~A&B)))|(A&~D&(~B|~C))|(~A&~B&~C&D);
}
void BS_SBoxK(bsvec_t input[28], bsvec_t output[28])
{
bsvec_t A, B, C, D;
LOADINPUTS(0);
output[0] = (~A&~B&C) | (A&B&D) | (A&~B&(~D | ~C)) | (~A&B&~C&~D);
output[7] = (A&((C&~D)|(~B&D)))|(~C&D&(A|~B)) | (~A&B&~(C^D));
output[14] = (C&((~B&~D)|(~A&B))) | (A&B&(D|~C)) | (~A&~B&~C&D);
output[21] = (C&~D&(A|B)) |((A&B&C) | (~B&~C&D)) | (~A&~B&(D|~C));
LOADINPUTS(1);
output[1] = (~A&C&(B | D)) | (B&((~A&D) | (A&~C))) | (~B&~D&~(A^C));
output[8] = (~A&~B&D) | ((A^D)&~C) | (B&C&(~D | A));
output[15] = (~A&((~B&(D | C)) | (C&D))) | (~B&C&D) | (A&B&(~C | ~D));
output[22] = (C&(B^D)) | (~D&(A^B)) | (A&B&~C&D);
LOADINPUTS(2);
output[2] = (~C&((~A&(~B|~D)) | (~B&~D))) | (B&((C&D) | (A&(C|D))));
output[9] = (~A&D&(C|~B)) | (B&((A&~C)|(~A&~D))) | (A&~B&C&~D);
output[16] = (C&D&(B|~A))|(~A&~C&(B|~D))|(A&~B&(C^D));
output[23] = (~B&(C^D)) | ( (A&B&~D)|(~A&~B&~C)) | (~A&B&C&D);
LOADINPUTS(3);
output[3] = (~B&C&(D | ~A)) | ((~A&B&D) | (A&~C&~D)) | (A&B&~D);
output[10] = ((~A&C&~D)|(A&B&D)) | (~A&D&(~C|~B)) |(A&~B&~C&~D);
output[17] = (C&((A&B)|(~A&D)))| (~B&((~A&D)|(A&~C))) | (~A&B&~C&~D);
output[24] = (~D&((~B&C)|(A&~C))) | (B&~C&(A|~D)) | (~A&D&~(B^C));
LOADINPUTS(4);
output[4] = (~(A^B)&~C&D) | ((C | (~A&B))&~D) | (A&~B&C);
output[11] = (~B&(C^D))|(~C&(A^B)) |(A&B&C&D);
output[18] = ((~A&B&D)|(~B&~C&~D)) | (~A&~B&(~D|~C)) |(A&C&(B^D));
output[25] = (~A&(B^C)) | (~(A^D)&~C) | (A&B&C&~D);
LOADINPUTS(5);
output[5] = (~A&((~B&~D) | (B&~C&D))) | (A&(~(C^D) | (~B&~C)));
output[12] = (~B&C&(D|~A)) |(B&D&(~C|~A)) | (A&~D&~(B^C));
output[19] = (~A&C&(~D|B))|(~B&D&(A|~C)) | (A&B&~C);
output[26] = (C&D&(A|B))|(A&~D&(~C|B))|(~C&((B&~D)|(~A&~B&D)));
LOADINPUTS(6);
output[6] = ((A^C)&B) | (~B&((A&C)^D));
output[13] = (C&((~A&~D)|(A&~B)))|(~A&~C&(D|~B)) |(A&B&~C&~D);
output[20] = (~A&D&(B|~C)) | (A&~D&(~C|B)) |( (A&B&~C) | (~A&~B&C&~D));
output[27] = (B&D&(C|~A)) |(A&~B&(~D|~C)) | (~C&~D&(A|~B));
}
void BS_RoundFunctionK(bsvec_t Kz[28], bsvec_t Ky[28], bsvec_t Kx[28])
{
bsvec_t newKz[28];
BS_SBoxK(Kx, newKz);
BS_DiffuseNetworkK(Kz, Ky, Kx);
memcpy(Kz, newKz, sizeof(newKz));
}
void BS_RoundFunctionB(bsvec_t Bz[28], bsvec_t By[28],
bsvec_t Bx[28], bsvec_t Ky[28])
{
bsvec_t newBz[28];
BS_SBoxB(Bx, newBz);
BS_DiffuseNetworkB(Bz, By, Bx, Ky);
memcpy(Bz, newBz, sizeof(newBz));
}
void BS_BlockModule(BS_HDCPBlockModule *bm)
{
BS_RoundFunctionB(bm->B[2], bm->B[1], bm->B[0], bm->K[1]);
BS_RoundFunctionK(bm->K[2], bm->K[1], bm->K[0]);
}
/* Easy-to-read version, but slow */
void BS_OutputFunction_(bsvec_t Bz[28], bsvec_t By[28],
bsvec_t Kz[28], bsvec_t Ky[28],
bsvec_t result[24])
{
const static unsigned char BS_OutputTable[24][16] =
{
{17, 26, 22, 27, 21, 18, 2, 5, 3, 6, 0, 9, 4, 22, 5, 10},
{ 5, 20, 15, 24, 2, 25, 0, 16, 20, 18, 7, 23, 15, 5, 3, 25},
{22, 5, 14, 16, 25, 17, 20, 11, 7, 19, 2, 10, 22, 4, 13, 21},
{19, 3, 15, 11, 21, 16, 27, 1, 6, 14, 9, 8, 17, 18, 12, 24},
{19, 6, 17, 18, 22, 7, 9, 12, 25, 6, 5, 2, 10, 15, 21, 8},
{ 3, 7, 4, 8, 16, 6, 5, 17, 27, 14, 2, 4, 24, 19, 1, 12},
{ 8, 21, 27, 2, 11, 24, 12, 3, 17, 26, 4, 16, 27, 7, 22, 11},
{ 9, 5, 7, 4, 8, 13, 3, 15, 9, 10, 19, 11, 7, 6, 8, 23},
{26, 13, 23, 10, 11, 7, 15, 19, 13, 12, 18, 24, 15, 23, 7, 16},
{ 1, 0, 19, 11, 13, 16, 24, 18, 0, 5, 20, 25, 1, 24, 9, 27},
{26, 13, 9, 14, 10, 4, 1, 2, 14, 23, 27, 25, 17, 19, 1, 22},
{21, 15, 5, 3, 13, 25, 16, 27, 6, 21, 17, 15, 26, 11, 16, 7},
{20, 7, 18, 12, 17, 1, 16, 0, 11, 22, 20, 0, 26, 23, 17, 2},
{14, 23, 1, 12, 24, 6, 18, 9, 8, 4, 3, 14, 20, 26, 23, 15},
{19, 6, 21, 25, 23, 1, 10, 8, 19, 0, 18, 2, 13, 8, 24, 14},
{ 3, 0, 27, 23, 19, 8, 4, 7, 16, 21, 24, 25, 12, 27, 15, 18},
{ 6, 5, 14, 22, 24, 18, 2, 21, 3, 5, 8, 25, 7, 27, 2, 26},
{ 3, 4, 2, 6, 22, 14, 12, 26, 11, 14, 23, 17, 22, 13, 19, 4},
{25, 21, 19, 9, 10, 15, 13, 22, 1, 16, 14, 11, 12, 6, 10, 19},
{23, 11, 10, 20, 1, 12, 14, 4, 21, 1, 10, 20, 18, 26, 9, 13},
{11, 26, 20, 17, 8, 23, 0, 24, 20, 21, 9, 25, 12, 3, 15, 0},
{ 9, 17, 26, 4, 27, 0, 15, 6, 18, 12, 21, 27, 1, 16, 24, 20},
{22, 12, 2, 10, 7, 20, 25, 13, 13, 0, 3, 16, 22, 11, 26, 9},
{27, 24, 26, 8, 0, 9, 18, 23, 2, 0, 13, 5, 4, 8, 10, 3}
};
int i, j;
for (i = 0; i < 24; i++) {
result[i] = 0;
for (j = 0; j < 7; j++) {
result[i] ^= Bz[BS_OutputTable[i][j]] & Kz[BS_OutputTable[i][j+8]];
}
result[i] ^= By[BS_OutputTable[i][7]] ^ Ky[BS_OutputTable[i][15]];
}
}
/* Generate an unrolled version */
void BS_OutputFunction_print(void)
{
const static unsigned char BS_OutputTable[24][16] =
{
{17, 26, 22, 27, 21, 18, 2, 5, 3, 6, 0, 9, 4, 22, 5, 10},
{ 5, 20, 15, 24, 2, 25, 0, 16, 20, 18, 7, 23, 15, 5, 3, 25},
{22, 5, 14, 16, 25, 17, 20, 11, 7, 19, 2, 10, 22, 4, 13, 21},
{19, 3, 15, 11, 21, 16, 27, 1, 6, 14, 9, 8, 17, 18, 12, 24},
{19, 6, 17, 18, 22, 7, 9, 12, 25, 6, 5, 2, 10, 15, 21, 8},
{ 3, 7, 4, 8, 16, 6, 5, 17, 27, 14, 2, 4, 24, 19, 1, 12},
{ 8, 21, 27, 2, 11, 24, 12, 3, 17, 26, 4, 16, 27, 7, 22, 11},
{ 9, 5, 7, 4, 8, 13, 3, 15, 9, 10, 19, 11, 7, 6, 8, 23},
{26, 13, 23, 10, 11, 7, 15, 19, 13, 12, 18, 24, 15, 23, 7, 16},
{ 1, 0, 19, 11, 13, 16, 24, 18, 0, 5, 20, 25, 1, 24, 9, 27},