static void
F_func(uint8_t *out, const uint8_t *in, const uint8_t *c, const struct kuzn_ctx *ctx)
{
uint8_t tmp[16];
LSX(tmp, in, c, ctx);
X_func(tmp, tmp, in + 0x10);
memcpy(out + 0x10, in, 0x10);
memcpy(out, tmp, 0x10);
}
void
kuzn_encrypt(struct kuzn_ctx *ctx, const uint8_t *in, uint8_t *out)
{
uint8_t tmp[16];
assert(ctx != NULL && in != NULL && out != NULL);
LSX(tmp, in, ctx->keys, ctx); //K1
LSX(tmp, tmp, ctx->keys + 16, ctx); //K2
LSX(tmp, tmp, ctx->keys + 16 * 2, ctx); //K3
LSX(tmp, tmp, ctx->keys + 16 * 3, ctx); //K4
LSX(tmp, tmp, ctx->keys + 16 * 4, ctx); //K5
LSX(tmp, tmp, ctx->keys + 16 * 5, ctx); //K6
LSX(tmp, tmp, ctx->keys + 16 * 6, ctx); //K7
LSX(tmp, tmp, ctx->keys + 16 * 7, ctx); //K8
LSX(tmp, tmp, ctx->keys + 16 * 8, ctx); //K9
X_func(out, tmp, ctx->keys + 16 * 9); //K10
}
// Encryption using Kuznechik algorithm
void kuz_encrypt(unsigned char text[16], unsigned char keys[10][16]) {
int i = 0;
for(i = 0; i < 9; ++i) {
LSX(keys[i], text);
}
_asm {
mov esi, text;
mov edi, keys;
lea edi, [edi + 16*9];
movdqu xmm0, [esi];
movdqu xmm1, [edi];
pxor xmm0, xmm1;
movdqu [esi], xmm0;
}
return;
}
