Mercurial > dropbear
view libtomcrypt/notes/etc/whirlgen.c @ 1492:bd46cf0e245a
update some dependencies
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Wed, 14 Feb 2018 00:17:30 +0800 |
parents | 6dba84798cd5 |
children |
line wrap: on
line source
#include <stdio.h> unsigned E[16] = { 1, 0xb, 9, 0xc, 0xd, 6, 0xf, 3, 0xe, 8, 7, 4, 0xa, 2, 5, 0 }; unsigned Ei[16]; unsigned R[16] = { 7, 0xc, 0xb, 0xd, 0xe, 4, 9, 0xf, 6, 3, 8, 0xa, 2, 5, 1, 0 }; unsigned cir[8][8] = { {1, 1, 4, 1, 8, 5, 2, 9 }, }; unsigned gf_mul(unsigned a, unsigned b) { unsigned r; r = 0; while (a) { if (a & 1) r ^= b; a >>= 1; b = (b << 1) ^ (b & 0x80 ? 0x11d : 0x00); } return r; } unsigned sbox(unsigned x) { unsigned a, b, w; a = x >> 4; b = x & 15; a = E[a]; b = Ei[b]; w = a ^ b; w = R[w]; a = E[a ^ w]; b = Ei[b ^ w]; return (a << 4) | b; } int main(void) { unsigned x, y; for (x = 0; x < 16; x++) Ei[E[x]] = x; // for (x = 0; x < 16; x++) printf("%2x ", sbox(x)); for (y = 1; y < 8; y++) { for (x = 0; x < 8; x++) { cir[y][x] = cir[y-1][(x-1)&7]; } } /* printf("\n"); for (y = 0; y < 8; y++) { for (x = 0; x < 8; x++) printf("%2d ", cir[y][x]); printf("\n"); } */ for (y = 0; y < 8; y++) { printf("static const ulong64 sbox%d[] = {\n", y); for (x = 0; x < 256; ) { printf("CONST64(0x%02x%02x%02x%02x%02x%02x%02x%02x)", gf_mul(sbox(x), cir[y][0]), gf_mul(sbox(x), cir[y][1]), gf_mul(sbox(x), cir[y][2]), gf_mul(sbox(x), cir[y][3]), gf_mul(sbox(x), cir[y][4]), gf_mul(sbox(x), cir[y][5]), gf_mul(sbox(x), cir[y][6]), gf_mul(sbox(x), cir[y][7])); if (x < 255) printf(", "); if (!(++x & 3)) printf("\n"); } printf("};\n\n"); } printf("static const ulong64 cont[] = {\n"); for (y = 0; y <= 10; y++) { printf("CONST64(0x"); for (x = 0; x < 8; x++) { printf("%02x", sbox((8*y + x)&255)); } printf("),\n"); } printf("};\n\n"); return 0; } /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */