this.allow = buf[bi] == (byte) 0x00;
        bi++;
        this.flags = buf[bi++] & 0xFF;
        final int size = SMBUtil.readInt2(buf, bi);
        bi += 2;
        this.access = SMBUtil.readInt4(buf, bi);
        bi += 4;
        this.sid = new SID(buf, bi);
        return size;
    }

    void appendCol(final StringBuffer sb, final String str, final int width) {

        bufferIndex++; // revision
        bufferIndex++;
        type = ServerMessageBlock.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        final int ownerUOffset = ServerMessageBlock.readInt4(buffer, bufferIndex); // offset to owner sid
        bufferIndex += 4;
        final int ownerGOffset = ServerMessageBlock.readInt4(buffer, bufferIndex); // offset to group sid
        bufferIndex += 4;

        // Read total allocation units.
        this.alloc = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        // read caller available allocation units
        this.free = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        // skip actual free units
        bufferIndex += 8;

        this.sectPerAlloc = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        this.server.smaxMpxCount = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.server.maxNumberVcs = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.server.maxBufferSize = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.server.maxRawSize = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        bufferIndex++;
        this.type = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        final int ownerUOffset = SMBUtil.readInt4(buffer, bufferIndex); // offset to owner sid
        bufferIndex += 4;
        final int ownerGOffset = SMBUtil.readInt4(buffer, bufferIndex); // offset to group sid
        bufferIndex += 4;
        SMBUtil.readInt4(buffer, bufferIndex); // offset to sacl
        bufferIndex += 4;

        final int start = bufferIndex;

        status = readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        converter = readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        numEntries = readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        totalAvailableEntries = readInt2(buffer, bufferIndex);
        bufferIndex += 2;

        return bufferIndex - start;

        bufferIndex += 8;
        this.endOfFile = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;
        this.allocationSize = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;
        this.extFileAttributes = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        int fileNameLength = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        final int start = bufferIndex;
        this.alloc = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        this.free = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        this.sectPerAlloc = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        this.bytesPerSect = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

		return 0, io.EOF
	}
	r.prevRune = -1
	n = copy(b, r.s[r.i:])
	r.i += int64(n)
	return
}

// ReadAt implements the [io.ReaderAt] interface.
func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {
	// cannot modify state - see io.ReaderAt
	if off < 0 {
		return 0, errors.New("bytes.Reader.ReadAt: negative offset")
	}
	if off >= int64(len(r.s)) {
		return 0, io.EOF
	}
	n = copy(b, r.s[off:])

        System.arraycopy(buffer, offset, keyBytes, 0, 16);
        this.leaseKey = new Smb2LeaseKey(keyBytes);
        
        this.leaseState = readInt4(buffer, offset + 16);
        this.leaseFlags = readInt4(buffer, offset + 20);
        this.leaseDuration = readInt8(buffer, offset + 24);
        
        if (length >= 52) {  // V2 lease
            byte[] parentKeyBytes = new byte[16];