Question

在我的应用程序中，我已经实现了通过复制sdcard上的数据库文件来导出数据库的可能性。如果没有加密文件或需要特殊的密钥来读取它，我只想确保选择文件的任何人只需在sqlite文件阅读器中打开它就可以读取数据库结构或数据。

如何为文件实现轻松简单的保护？

以下是我的数据库导出代码。

public void exportDB() {
    final String destFolder = "/"+Constants.Files.APP_FOLDER+"/"+Constants.Files.BACKUP_FOLDER;
    try {
        File myBackupDir = new File(Environment.getExternalStorageDirectory() + destFolder);
        if(!myBackupDir.exists() || !myBackupDir.isDirectory()) myBackupDir.mkdirs();
        if(myBackupDir.isDirectory()){
            File data = Environment.getDataDirectory();
            if (Environment.getExternalStorageDirectory().canWrite()) {
                final String  currentDBPath= "//data//" + Constants.Files.PACKAGE_NAME + "//databases//" + Constants.Files.DB_NAME;
                File currentDB = new File(data, currentDBPath);
                File backupDB = new File(myBackupDir, Constants.Files.DB_NAME);
                if(currentDB.isFile()){
                    copyFile(new FileInputStream(currentDB), new FileOutputStream(backupDB))
                }
            }
        }
    } catch (Exception e) {
        Log.e(mTag, "exportDB", e);
    }
}



public static void copyFile(FileInputStream fromFile, FileOutputStream toFile) throws IOException {
    FileChannel fromChannel = null;
    FileChannel toChannel = null;
    try {
        fromChannel = fromFile.getChannel();
        toChannel = toFile.getChannel();
        fromChannel.transferTo(0, fromChannel.size(), toChannel);
    } finally {
        try {
            if (fromChannel != null) {
                fromChannel.close();
            }
        } finally {
            if (toChannel != null) {
                toChannel.close();
            }
        }
    }
}

Answer 1

您可以使用sqlcipher。它支持android。您可以使用现有代码将其导出，因为数据库已经加密。

导出数据库的轻量级保护

1 个答案: