FTP client file size increases

                                FTPClient ftp = new FTPClient();
                                FileInputStream fis = null;
                                String hash = Utils.getCRC32(file);

                                ftp.connect("ip");

                                ftp.setFileTransferMode(FTP.BINARY_FILE_TYPE);
                                ftp.setFileType(FTP.BINARY_FILE_TYPE);
                                ftp.enterLocalPassiveMode();

                                ftp.login("username", "password");

                                fis = new FileInputStream(file);

                                int endIndex = file.getName().lastIndexOf(".");
                                if (endIndex != -1){
                                    String fName = file.getName().substring(0, endIndex);
                                    String ext = file.getName().substring(endIndex, file.getName().length());
                                    String fileName = fName + "_" + hash + ext;
                                    Printer.log("Uploading " + fileName + "...");
                                    ftp.storeFile(fileName, fis);
                                    Printer.log("Successfully uploaded " + fileName + "!");
                                }

                                ftp.logout();
                                ftp.disconnect();
                                fis.close();