docs: private static Key createDESKey(final byte[] bytes, final int offset) {
          final byte[] keyBytes = new byte[7];
          System.arraycopy(bytes, offset, keyBytes, 0, 7);
          final byte[] material = new byte[8];
          material[0] = keyBytes[0];
          material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
          material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
          material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
          material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
          material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
          material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
          material[7] = (byte) (keyBytes[6] << 1);
          oddParity(material);
          return new SecretKeySpec(material, "DES");
      }