Function blake2s_init_param

freebsd/contrib/libb2/blake2s.c:200–214

init2 xors IV with input parameter block */

/* init2 xors IV with input parameter block */
int blake2s_init_param( blake2s_state *S, const blake2s_param *P )
{
  uint8_t *p, *h, *v;
  //blake2s_init0( S );
  v = ( uint8_t * )( blake2s_IV );
  h = ( uint8_t * )( S->h );
  p = ( uint8_t * )( P );
  /* IV XOR ParamBlock */
  memset( S, 0, sizeof( blake2s_state ) );

  for( int i = 0; i < BLAKE2S_OUTBYTES; ++i ) h[i] = v[i] ^ p[i];

  S->outlen = P->digest_length;
  return 0;
}


/* Some sort of default parameter block initialization, for sequential blake2s */