我想加密我的數據庫並將其保存到SD卡使用this後的回答。 但問題是,當我將文件放回我的應用程序包中的databases
文件夾中時, 無法通過SQLiteOpenHelper
讀取該文件。錯誤:SQLite數據庫解密使用AES
08-30 10:58:35.692:E/SQLiteLog(3801):(26)文件進行加密或不是數據庫
08-30 10點58 :35.692:E/DefaultDatabaseErrorHandler(3801):sqlite在數據庫上報告的損壞:/data/data/com.padra_tech.karamad/databases/PrimaryInformation
- 08-30 10:58:35.692:E/DefaultDatabaseErrorHandler(3801) :!@ make .back文件
,這是我的課:
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();
}
}
您使用的是相同的代碼後?如果不是,你可以提供你使用的代碼片段加密和解密數據庫 – hoomi 2014-08-30 07:18:26
@hoomi我添加了代碼 – Mohsen 2014-08-30 07:27:03
我只是想知道。你想加密目錄或文件嗎? – hoomi 2014-08-30 07:33:48