我想我的资料加密基地和使用的答案将它保存到SD卡这一职位。但是问题是,当我将文件放回databases
应用程序包的文件夹中时,它无法被读取SQLiteOpenHelper
。错误 :
08-30 10:58:35.692:E / SQLiteLog(3801):(26)文件已加密或不是数据库
08-30 10:58:35.692:E / DefaultDatabaseErrorHandler(3801):sqlite报告数据库损坏:/data/data/com.padra_tech.karamad/databases/PrimaryInformation
08-30 10:58:35.692:E / DefaultDatabaseErrorHandler(3801):!@创建.back文件
这是我的课:
package dataBases;
public class BackupHelper {
public static int SECURITY_NONE = 1 ;
public static int SECURITY_ENCRYPTED = 2 ;
public static void backup(Context context, int securityMode) {
File backup = new File(Environment.getExternalStorageDirectory()+
"/" + "KarAmad" + "/" + "backup");
backup.mkdirs();
List<File> src = new ArrayList<File>();
List<File> dst = new ArrayList<File>();
try {
src.add( new File(new PrimaryInformationDataBase(context).getDirectory()) );
dst.add( new File(backup.getPath() + "/" + "PI") );
src.add( new File(new TransactionDataBase(context).getDirectory()) );
dst.add( new File(backup.getPath() + "/" + "T") );
src.add( new File(new NoteDataBase(context).getDirectory()) );
dst.add( new File(backup.getPath() + "/" + "N") );
src.add( new File(new PictureDataBase(context).getDirectory()) );
dst.add( new File(backup.getPath() + "/" + "P") );
for(int i = 0 ; i < src.size() ; i ++) {
dst.get(i).createNewFile();
if(securityMode == SECURITY_ENCRYPTED)
BackupHelper.encrypt(src.get(i), dst.get(i));
else
LeftFragment.copy(src.get(i), dst.get(i));
}
Toast.makeText(context, "پشتیبان گیری انجام شد", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(context, "پشتیبان گیری انجام نشد!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
public static void restore(Context context, int securityMode) {
NoteDataBase dummyNoteDataBase = new NoteDataBase(context);
String temp = dummyNoteDataBase.getDirectory();
String dataBasesPath = temp.substring(0, temp.lastIndexOf("/"));
File source = new File(Environment.getExternalStorageDirectory()+
"/" + "KarAmad" + "/" + "backup");
List<File> src = new ArrayList<File>();
List<File> dst = new ArrayList<File>();
try {
src.add( new File(source.getPath() + "/" + "PI") );
dst.add( new File(dataBasesPath + "/" + "PrimaryInformation") );
src.add( new File(source.getPath() + "/" + "T") );
dst.add( new File(dataBasesPath + "/" + "Transaction") );
src.add( new File(source.getPath() + "/" + "N") );
dst.add( new File(dataBasesPath + "/" + "Note") );
src.add( new File(source.getPath() + "/" + "P") );
dst.add( new File(dataBasesPath + "/" + "Picture") );
for(int i = 0 ; i < src.size() ; i++) {
dst.get(i).createNewFile();
if(securityMode == SECURITY_ENCRYPTED)
BackupHelper.decrypt(src.get(i), dst.get(i));
else
LeftFragment.copy(src.get(i), dst.get(i));
}
Toast.makeText(context, "بازیابی فایل پشتیبان انجام شد", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(context, "بازیابی فایل پشتیبان انجام نشد!", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
public static void encrypt(File src, File dst) throws IOException,
NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
FileInputStream inputStream = new FileInputStream(src);
FileOutputStream outputStream = new FileOutputStream(dst);
SecretKeySpec keySpec = new SecretKeySpec("1393032613930326".getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, keySpec);
CipherOutputStream cipherOutputStream =
new CipherOutputStream(outputStream, cipher);
int b;
byte[] d = new byte[8];
while((b = inputStream.read(d)) > 0) {
cipherOutputStream.write(d, 0, b);
}
cipherOutputStream.flush();
cipherOutputStream.close();
inputStream.close();
}
public static void decrypt(File src, File dst) throws IOException,
NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
FileInputStream inputStream = new FileInputStream(src);
FileOutputStream outputStream = new FileOutputStream(dst);
SecretKeySpec keySpec = new SecretKeySpec("1393032613930326".getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, keySpec);
CipherInputStream cipherOutputStream =
new CipherInputStream(inputStream, cipher);
int b;
byte[] d = new byte[8];
while((b = inputStream.read(d)) > 0) {
outputStream.write(d, 0, b);
}
outputStream.flush();
outputStream.close();
cipherOutputStream.close();
}
}
该decrypt
方法从而inputStream
不是从错误的名称读取cipherOutputStream
。因此,您只是制作一个副本,而不是解密数据库。
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我来说两句