@@@ fltfmt mess

[mLib] / hash / t / siphash-mktv.c

#include <stdio.h>

#include "siphash.h"

#define TAP 0x8299

static void step(int *rng_inout)
{
  unsigned i;
  int x = *rng_inout;

  for (i = 0; i < 8; i++) x = (x << 1) ^ ((x >> 31)&TAP);
  *rng_inout = x;
}

static void fill(int *rng_inout, unsigned char *p, size_t sz)
  { while (sz--) { *p++ = *rng_inout&0xff; step(rng_inout); } }

static void dump(const char *name, const unsigned char *p, size_t sz)
{
  size_t i;

  printf("%s = ", name);
  if (!sz)
    fputs("\"\"", stdout);
  else for (i = 0; i < sz; i++) {
    if (!i || i%4) ;
    else if (!(i%32)) fputs("\n    ", stdout);
    else if (!(i%4)) fputc(' ', stdout);
    printf("%02x", *p++);
  }
  fputc('\n', stdout);
}

int main(void)
{
  unsigned char k[16], h[8];
  unsigned char msg[1024];
  int rng = 0xe6161f4d;
  unsigned i;

  for (i = 0; i <= sizeof(msg); i++) {
    if (i) fputc('\n', stdout);
    fill(&rng, k, sizeof(k)); dump("k", k, sizeof(k));
    fill(&rng, msg, i); dump("m", msg, i);
    siphash(msg, i, k, h, sizeof(h)); dump("h", h, sizeof(h));
  }
  return (0);
}