Function blake2b_init_key

freebsd/contrib/libb2/blake2b.c:253–285

}

int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen )
{
  if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;

  if ( ( !keylen ) || keylen > BLAKE2B_KEYBYTES ) return -1;

  const blake2b_param P =
  {
    ( uint8_t ) outlen,
    ( uint8_t ) keylen,
    1,
    1,
    0,
    0,
    0,
    0,
    {0},
    {0},
    {0}
  };

  if( blake2b_init_param( S, &P ) < 0 )
    return 0;

  {
    uint8_t block[BLAKE2B_BLOCKBYTES];
    memset( block, 0, BLAKE2B_BLOCKBYTES );
    memcpy( block, key, keylen );
    blake2b_update( S, block, BLAKE2B_BLOCKBYTES );
    secure_zero_memory( block, BLAKE2B_BLOCKBYTES ); /* Burn the key from stack */
  }
  return 0;
}

static inline int blake2b_compress( blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES] )
{