*
   * @since 15.0
   */
  public static CharSource empty() {
    return EmptyCharSource.INSTANCE;
  }

  /** A byte source that reads chars from this source and encodes them as bytes using a charset. */
  private final class AsByteSource extends ByteSource {

    final Charset charset;

    AsByteSource(Charset charset) {

   *
   * @since 15.0
   */
  public static CharSource empty() {
    return EmptyCharSource.INSTANCE;
  }

  /** A byte source that reads chars from this source and encodes them as bytes using a charset. */
  private final class AsByteSource extends ByteSource {

    final Charset charset;

    AsByteSource(Charset charset) {

     *
     * @param tc
     *            context to use
     *
     * @return the MAC address as an array of six bytes
     * @throws UnknownHostException
     *             if the host cannot be resolved to
     *             determine the MAC address.
     */
    byte[] getMacAddress(CIFSContext tc) throws UnknownHostException;

    /**

            DummySSPContext ctx = new DummySSPContext(new byte[] { 1 }, true, null, null, 0, true);
            byte[] data = new byte[] { 1, 2, 3 };
            byte[] wrongMic = new byte[] { 0 };
            assertThrows(CIFSException.class, () -> ctx.verifyMIC(data, wrongMic));
            assertThrows(CIFSException.class, () -> ctx.verifyMIC(null, new byte[] { 0 }));

Wenn die Passwörter nicht übereinstimmen, geben wir denselben Fehler zurück.

#### Passwort-Hashing

„Hashing“ bedeutet: Konvertieren eines Inhalts (in diesem Fall eines Passworts) in eine Folge von Bytes (ein schlichter String), die wie Kauderwelsch aussieht.

Immer wenn Sie genau den gleichen Inhalt (genau das gleiche Passwort) übergeben, erhalten Sie genau den gleichen Kauderwelsch.

Si los passwords no coinciden, devolvemos el mismo error.

#### Hashing de passwords

"Hacer hash" significa: convertir algún contenido (un password en este caso) en una secuencia de bytes (solo un string) que parece un galimatías.

Siempre que pases exactamente el mismo contenido (exactamente el mismo password) obtienes exactamente el mismo galimatías.

Pero no puedes convertir del galimatías al password.

        // Calculate hash
        Method calcMethod = findMethod(transport.getClass(), "calculatePreauthHash", byte[].class, int.class, int.class, byte[].class);
        calcMethod.setAccessible(true);

        byte[] input = "test data".getBytes();
        byte[] oldHash = new byte[64];

        byte[] newHash = (byte[]) calcMethod.invoke(transport, input, 0, input.length, oldHash);

        assertNotNull(newHash);

        buffer.position(20);
        buffer.put((byte) 0x01); // Revision
        buffer.put((byte) 0x01); // SubAuthorityCount
        buffer.put(new byte[] { 0, 0, 0, 0, 0, 1 }); // IdentifierAuthority
        buffer.putInt(0); // SubAuthority

        // Group SID at offset 40
        buffer.position(40);
        buffer.put((byte) 0x01); // Revision
        buffer.put((byte) 0x01); // SubAuthorityCount

     *
     * @param expectTag the expected tag number
     * @param limit the maximum length limit
     * @param in the ASN.1 input stream
     * @return coded bytes of the tagged object
     * @throws IOException if reading fails or tag mismatch
     */
    public static byte[] readUnparsedTagged(final int expectTag, final int limit, final ASN1InputStream in) throws IOException {
        final int ftag = in.read();

            }
            return statObject;
        }

        /**
         * Gets the content length of the storage object.
         *
         * @return The content length in bytes, or -1 if unavailable
         */
        @Override
        public long getContentLengthLong() {
            if (minioClient == null) {
                return -1;
            }
            try {