96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
#include <stdio.h>
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unsigned E[16] = { 1, 0xb, 9, 0xc, 0xd, 6, 0xf, 3, 0xe, 8, 7, 4, 0xa, 2, 5, 0 };
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unsigned Ei[16];
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unsigned R[16] = { 7, 0xc, 0xb, 0xd, 0xe, 4, 9, 0xf, 6, 3, 8, 0xa, 2, 5, 1, 0 };
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unsigned cir[8][8] = {
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{1, 1, 4, 1, 8, 5, 2, 9 },
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};
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unsigned gf_mul(unsigned a, unsigned b)
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{
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unsigned r;
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r = 0;
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while (a) {
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if (a & 1) r ^= b;
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a >>= 1;
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b = (b << 1) ^ (b & 0x80 ? 0x11d : 0x00);
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}
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return r;
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}
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unsigned sbox(unsigned x)
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{
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unsigned a, b, w;
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a = x >> 4;
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b = x & 15;
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a = E[a]; b = Ei[b];
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w = a ^ b; w = R[w];
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a = E[a ^ w]; b = Ei[b ^ w];
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return (a << 4) | b;
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}
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int main(void)
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{
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unsigned x, y;
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for (x = 0; x < 16; x++) Ei[E[x]] = x;
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// for (x = 0; x < 16; x++) printf("%2x ", sbox(x));
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for (y = 1; y < 8; y++) {
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for (x = 0; x < 8; x++) {
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cir[y][x] = cir[y-1][(x-1)&7];
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}
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}
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/*
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printf("\n");
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for (y = 0; y < 8; y++) {
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for (x = 0; x < 8; x++) printf("%2d ", cir[y][x]);
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printf("\n");
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}
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*/
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for (y = 0; y < 8; y++) {
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printf("static const ulong64 sbox%d[] = {\n", y);
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for (x = 0; x < 256; ) {
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printf("CONST64(0x%02x%02x%02x%02x%02x%02x%02x%02x)",
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gf_mul(sbox(x), cir[y][0]),
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gf_mul(sbox(x), cir[y][1]),
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gf_mul(sbox(x), cir[y][2]),
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gf_mul(sbox(x), cir[y][3]),
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gf_mul(sbox(x), cir[y][4]),
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gf_mul(sbox(x), cir[y][5]),
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gf_mul(sbox(x), cir[y][6]),
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gf_mul(sbox(x), cir[y][7]));
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if (x < 255) printf(", ");
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if (!(++x & 3)) printf("\n");
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}
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printf("};\n\n");
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}
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printf("static const ulong64 cont[] = {\n");
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for (y = 0; y <= 10; y++) {
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printf("CONST64(0x");
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for (x = 0; x < 8; x++) {
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printf("%02x", sbox((8*y + x)&255));
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}
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printf("),\n");
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}
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printf("};\n\n");
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return 0;
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}
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/* $Source$ */
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/* $Revision$ */
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/* $Date$ */
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