javacipheroutputstream解密到对象_Java：使用DES解密对象时发生StreamCorruptedException...

我有两种方法来从Android内部存储中的文件进行加密保存和解密加载对象。

加密和保存过程已完成&＃xff0c;没有任何问题&＃xff0c;但是当我要加载对象StreamCorruptedException时&＃xff0c;inputStream &＃61; new

ObjectInputStream(cipherInputStream);

我搜索的次数越来越多&＃xff0c;但没有找到解决问题的方法。所有其他解决方案都是为了延长插座寿命或类似的。

我的代码如下&＃xff1a;

private static byte[] iv &＃61; { (byte) 0xB1, (byte) 0x15, (byte) 0xB5,

(byte) 0xB7, (byte) 0x66, (byte) 0x43, (byte) 0x2F, (byte) 0xA4,

(byte) 0xB1, (byte) 0x15, (byte) 0x35, (byte) 0xC7, (byte) 0x66,

(byte) 0x58, (byte) 0x2F, (byte) 0x5F };

保存方法&＃xff1a;(工作正常)

private static String saveToFile(Serializable object, String fileName,

Context ctx) {

try {

Cipher cipher &＃61; null;

cipher &＃61; Cipher.getInstance("DES");

SecretKey key &＃61; KeyGenerator.getInstance("DES").generateKey();

AlgorithmParameterSpec paramSpec &＃61; new IvParameterSpec(iv);

cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

SealedObject sealedObject &＃61; null;

sealedObject &＃61; new SealedObject(object, cipher);

CipherOutputStream cipherOutputStream &＃61; null;

FileOutputStream fos &＃61; ctx.openFileOutput(fileName,

Context.MODE_PRIVATE);

cipherOutputStream &＃61; new CipherOutputStream(

new BufferedOutputStream(fos), cipher);

ObjectOutputStream outputStream &＃61; null;

outputStream &＃61; new ObjectOutputStream(cipherOutputStream);

outputStream.writeObject(sealedObject);

outputStream.close();

return "Save Complete!";

} catch (IOException e) {

e.printStackTrace();

return e.getMessage();

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

return e.getMessage();

} catch (NoSuchPaddingException e) {

e.printStackTrace();

return e.getMessage();

} catch (InvalidKeyException e) {

e.printStackTrace();

return e.getMessage();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

return e.getMessage();

} catch (InvalidAlgorithmParameterException e) {

e.printStackTrace();

return e.getMessage();

}

}

加载方法&＃xff1a;(无法从中加载对象cipherInputStream)

private static Serializable loadFromFile(String fileName, Context ctx) {

Cipher cipher &＃61; null;

Serializable userList &＃61; null;

try {

cipher &＃61; Cipher.getInstance("DES");

// Code to write your object to file

SecretKey key &＃61; KeyGenerator.getInstance("DES").generateKey();

AlgorithmParameterSpec paramSpec &＃61; new IvParameterSpec(iv);

cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);

CipherInputStream cipherInputStream &＃61; null;

FileInputStream fos &＃61; ctx.openFileInput(fileName);

cipherInputStream &＃61; new CipherInputStream(new BufferedInputStream(

fos), cipher);

ObjectInputStream inputStream &＃61; null;

inputStream &＃61; new ObjectInputStream(cipherInputStream);

// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

SealedObject sealedObject &＃61; null;

sealedObject &＃61; (SealedObject) inputStream.readObject();

userList &＃61; (Serializable) sealedObject.getObject(cipher);

inputStream.close();

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

return e.getMessage();

} catch (NoSuchPaddingException e) {

e.printStackTrace();

return e.getMessage();

} catch (InvalidKeyException e) {

e.printStackTrace();

return e.getMessage();

} catch (InvalidAlgorithmParameterException e) {

e.printStackTrace();

return e.getMessage();

} catch (FileNotFoundException e) {

e.printStackTrace();

return e.getMessage();

} catch (StreamCorruptedException e) {

e.printStackTrace();

return e.getMessage();

} catch (IOException e) {

e.printStackTrace();

return e.getMessage();

} catch (ClassNotFoundException e) {

e.printStackTrace();

return e.getMessage();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

return e.getMessage();

} catch (BadPaddingException e) {

e.printStackTrace();

return e.getMessage();

}

return userList;

}

公开的保存和加载方法&＃xff1a;

public Serializable loadPlayer(Context ctx) {

return loadFromFile("player.dat", ctx);

}

public String savePlayer(Player player, Context ctx) {

return saveToFile(player, "player.dat", ctx);

}