@Override public void scrubFile(FileChannel file) throws IOException, ScrubException { if (!Machos.isMacho(file)) { return; } long size = file.size(); MappedByteBuffer map = file.map(FileChannel.MapMode.READ_WRITE, 0, size); try { Machos.setUuid(map, ZERO_UUID); } catch (Machos.MachoException e) { throw new ScrubException(e.getMessage()); } map.rewind(); Hasher hasher = Hashing.sha1().newHasher(); while (map.hasRemaining()) { hasher.putByte(map.get()); } map.rewind(); try { Machos.setUuid(map, Arrays.copyOf(hasher.hash().asBytes(), 16)); } catch (Machos.MachoException e) { throw new ScrubException(e.getMessage()); } }