Function blake2s_final

freebsd/contrib/libb2/blake2s.c:362–386

int blake2s_final( blake2s_state *S, uint8_t *out, size_t outlen )
{
  uint8_t buffer[BLAKE2S_OUTBYTES];

  if(outlen != S->outlen ) return -1;

  if( S->buflen > BLAKE2S_BLOCKBYTES )
  {
    blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
    blake2s_compress( S, S->buf );
    S->buflen -= BLAKE2S_BLOCKBYTES;
    memcpy( S->buf, S->buf + BLAKE2S_BLOCKBYTES, S->buflen );
  }

  blake2s_increment_counter( S, ( uint32_t )S->buflen );
  blake2s_set_lastblock( S );
  memset( S->buf + S->buflen, 0, 2 * BLAKE2S_BLOCKBYTES - S->buflen ); /* Padding */
  blake2s_compress( S, S->buf );

  for( int i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
    store32( buffer + sizeof( S->h[i] ) * i, S->h[i] );

  memcpy( out, buffer, outlen );
  return 0;
}

int blake2s( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen )
{