}

    if (isMasked) {
      // Read the masking key as bytes so that they can be used directly for unmasking.
      source.readFully(maskKey!!)
    }
  }

  @Throws(IOException::class)
  private fun readControlFrame() {
    if (frameLength > 0L) {
      source.readFully(controlFrameBuffer, frameLength)

      if (!isClient) {
        controlFrameBuffer.readAndWriteUnsafe(maskCursor!!)

        } while (len > 0 && n == r);

        return (int) (fp - start);
    }

    @Override
    public final void readFully(final byte b[]) throws SmbException {
        readFully(b, 0, b.length);
    }

    @Override
    public final void readFully(final byte b[], final int off, final int len) throws SmbException {
        int n = 0, count;

        do {

    }

    @Test
    @DisplayName("readFully(): throws SmbEndOfFileException on premature EOF")
    void readFully_throws_onEOF() throws Exception {
        SmbRandomAccessFile raf = spy(newInstance("r", false, false, false));
        doReturn(-1).when(raf).read(any(byte[].class), anyInt(), anyInt());
        assertThrows(SmbEndOfFileException.class, () -> raf.readFully(new byte[4]));
    }

    @Test

    }

    @Override
    public void readFully(byte[] b) {
      try {
        input.readFully(b);
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public void readFully(byte[] b, int off, int len) {
      try {
        input.readFully(b, off, len);
      } catch (IOException e) {

        } catch (final CIFSException e) {
            throw SmbException.wrap(e);
        }
    }

    @Override
    public final void readFully(final byte b[]) throws SmbException {
        readFully(b, 0, b.length);
    }

    @Override
    public final void readFully(final byte b[], final int off, final int len) throws SmbException {
        int n = 0, count;

        do {

	//
	// The signature is 64 bytes long (hex-encoded SHA256 hash) and
	// starts with a 16 byte header: len("chunk-signature=") + 64 == 80.
	var signature [80]byte
	_, err = io.ReadFull(cr.reader, signature[:])
	if err == io.EOF {
		err = io.ErrUnexpectedEOF
	}
	if err != nil {
		cr.err = err
		return n, cr.err
	}
	if !bytes.HasPrefix(signature[:], []byte("chunk-signature=")) {

	}
	if length <= 0 {
		length = accessKeyMaxLen
	}
	if length < accessKeyMinLen {
		return "", errors.New("auth: access key length is too short")
	}

	key := make([]byte, length)
	if _, err := io.ReadFull(random, key); err != nil {
		return "", err
	}
	for i := range key {
		key[i] = alphaNumericTable[key[i]%alphaNumericTableLen]
	}
	return string(key), nil
}

func (tr *Reader) readHeader() (*Header, *block, error) {
	// Two blocks of zero bytes marks the end of the archive.
	if _, err := io.ReadFull(tr.r, tr.blk[:]); err != nil {
		return nil, nil, err // EOF is okay here; exactly 0 bytes read
	}
	if bytes.Equal(tr.blk[:], zeroBlock[:]) {
		if _, err := io.ReadFull(tr.r, tr.blk[:]); err != nil {
			return nil, nil, err // EOF is okay here; exactly 1 block of zeros read
		}

	// first read just those 4 bytes to see if it exists.
	if _, err := io.ReadFull(r, buf[:4]); err != nil {
		return err
	}
	off := 0
	maybeSig := readBuf(buf[:4])
	if maybeSig.uint32() != dataDescriptorSignature {
		// No data descriptor signature. Keep these four
		// bytes.
		off += 4
	}
	if _, err := io.ReadFull(r, buf[off:12]); err != nil {
		return err
	}
	b := readBuf(buf[:12])

					t.Fatalf("entry %d, Next(): got %v, want %v", i, err, nil)
				}
				buf := make([]byte, tc.cnt)
				if _, err := io.ReadFull(tr, buf); err != nil {
					t.Fatalf("entry %d, ReadFull(): got %v, want %v", i, err, nil)
				}
				if string(buf) != tc.output {
					t.Fatalf("entry %d, ReadFull(): got %q, want %q", i, string(buf), tc.output)
				}
			}

			if _, err := tr.Next(); err != io.EOF {