Function blake2b_init_param

freebsd/contrib/libb2/blake2b.c:213–227

init xors IV with input parameter block */

/* init xors IV with input parameter block */
int blake2b_init_param( blake2b_state *S, const blake2b_param *P )
{
  uint8_t *p, *h, *v;
  //blake2b_init0( S );
  v = ( uint8_t * )( blake2b_IV );
  h = ( uint8_t * )( S->h );
  p = ( uint8_t * )( P );
  /* IV XOR ParamBlock */
  memset( S, 0, sizeof( blake2b_state ) );

  for( int i = 0; i < BLAKE2B_OUTBYTES; ++i ) h[i] = v[i] ^ p[i];

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


/* Some sort of default parameter block initialization, for sequential blake2b */