¿Por qué es el escritorio de archivos AES IO incompatibles con el archivo de Android AES IO?

Question

He portado una aplicación de Android para escritorio que utiliza AES para cifrar algunos datos privados. Ambas aplicaciones son capaces de cifrar y descifrar los datos para su propio uso, pero incapaz de descifrar las otras aplicaciones de datos. La AES llaves, vías intravenosas, y los algoritmos son idénticos. La principal diferencia entre las dos aplicaciones es que el androide-SDK viene con el proveedor BouncyCastle ya se añadió a la seguridad, mientras que la aplicación de escritorio necesita

Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

Android aplicación:

public class AesFileIo {
 public final static String EOL = "\n";
 public static final String AES_ALGORITHM = "AES/CTR/NoPadding";
 public static final String PROVIDER = "BC"; 
 private static final SecretKeySpec secretKeySpec = 
  new SecretKeySpec(AES_KEY_128, "AES");
 private static final IvParameterSpec ivSpec = new IvParameterSpec(IV);

 public String readAesFile(Context c, String fileName) {
  StringBuilder stringBuilder = new StringBuilder();
  try {
   InputStream is = c.openFileInput(fileName);
   Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER);
   cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
   CipherInputStream cis = new CipherInputStream(is, cipher);
   InputStreamReader isr = new InputStreamReader(cis);
   BufferedReader reader = new BufferedReader(isr);
   String line;
   while ((line = reader.readLine()) != null) {
    stringBuilder.append(line).append(EOL);
   }
   is.close();
  } catch (java.io.FileNotFoundException e) {
   // OK, file probably not created yet
   Log.i(this.getClass().toString(), e.getMessage(), e);
  } catch (Exception e) {
   Log.e(this.getClass().toString(), e.getMessage(), e);
  }
  return stringBuilder.toString();
 }

 public void writeAesFile(Context c, String fileName, String theFile) {
  try {
   Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER); 
   cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
   byte[] encrypted = cipher.doFinal(theFile.getBytes()); 
   OutputStream os = c.openFileOutput(fileName, 0);
   os.write(encrypted);
   os.flush();
   os.close();
  } catch (Exception e) {
   Log.e(this.getClass().toString(), e.getMessage(), e);
  }
 }
}

Escritorio aplicación:

public class AesFileIo {
    private static final String EOL = "\n";
    private static final String AES_ALGORITHM = "AES/CTR/NoPadding";
    private static final SecretKeySpec secretKeySpec =
            new SecretKeySpec(AES_KEY_128, "AES");
    private static final IvParameterSpec ivSpec = new IvParameterSpec(IV);

    public void AesFileIo() {
        Security.addProvider(new org.bouncycastle.jce.provider
                .BouncyCastleProvider());
    }

    public String readFile(String fileName) {
        StringBuilder stringBuilder = new StringBuilder();
        try {
            ObjectInputStream is = new ObjectInputStream(
                new FileInputStream(fileName));
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
            CipherInputStream cis = new CipherInputStream(is, cipher);
            InputStreamReader isr = new InputStreamReader(cis);
            BufferedReader reader = new BufferedReader(isr);
            String line;
            while ((line = reader.readLine()) != null) {
                stringBuilder.append(line).append(EOL);
            }
            is.close();
        } catch (java.io.FileNotFoundException e) {
            System.out.println("FileNotFoundException: probably OK");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return stringBuilder.toString();
    }

    public void writeFile(String fileName, String theFile) {
        try {
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
            byte[] encrypted = cipher.doFinal(theFile.getBytes());
            ObjectOutputStream os = new ObjectOutputStream(
                new FileOutputStream(fileName));
            os.write(encrypted);
            os.flush();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Answer 1

Resuelto por

1. Adición constructores adecuados para inicializar SecretKeySpec y IvParameterSpec.
2. Deshacerse de ObjectOutputStream y ObjectInputStream en aplicación de escritorio.

Android aplicación:

public class AesFileIo {
    private static final String EOL = "\n";
    private static final String AES_ALGORITHM = "AES/CTR/NoPadding";
    private SecretKeySpec secretKeySpec;
    private IvParameterSpec ivSpec;
    private static final String PROVIDER = "BC"; 

    AesFileIo(byte[] aesKey, byte[] iv) {
        ivSpec = new IvParameterSpec(iv);
        secretKeySpec = new SecretKeySpec(aesKey, "AES");
    }

    public String readFile(Context c, String fileName) {
        StringBuilder stringBuilder = new StringBuilder();
        try {
            InputStream is = c.openFileInput(fileName);
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
            CipherInputStream cis = new CipherInputStream(is, cipher);
            InputStreamReader isr = new InputStreamReader(cis);
            BufferedReader reader = new BufferedReader(isr);
            String line;
            while ((line = reader.readLine()) != null) {
                stringBuilder.append(line).append(EOL);
            }
            is.close();
        } catch (java.io.FileNotFoundException e) {
            // OK, file probably not created yet
            Log.i(this.getClass().toString(), e.getMessage(), e);
        } catch (Exception e) {
            Log.e(this.getClass().toString(), e.getMessage(), e);
        }
        return stringBuilder.toString();
    }

    public void writeFile(Context c, String fileName, String theFile) {
        try {
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM, PROVIDER); 
            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
            byte[] encrypted = cipher.doFinal(theFile.getBytes()); 
            OutputStream os = c.openFileOutput(fileName, 0);
            os.write(encrypted);
            os.flush();
            os.close();
        } catch (Exception e) {
            Log.e(this.getClass().toString(), e.getMessage(), e);
        }
    }
}

Escritorio aplicación:

public class AesFileIo {

    private static final String EOL = "\n";
    private static final String AES_ALGORITHM = "AES/CTR/NoPadding";
    private SecretKeySpec secretKeySpec;
    private IvParameterSpec ivSpec;

    AesFileIo(byte[] aesKey, byte[] iv) {
        Security.addProvider(new org.bouncycastle.jce.provider
                .BouncyCastleProvider());
        ivSpec = new IvParameterSpec(iv);
        secretKeySpec = new SecretKeySpec(aesKey, "AES");
    }

    public String readFile(String fileName) {
        StringBuilder stringBuilder = new StringBuilder();
        try {
            FileInputStream fis = new FileInputStream(fileName);
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
            CipherInputStream cis = new CipherInputStream(fis, cipher);
            InputStreamReader isr = new InputStreamReader(cis);
            BufferedReader reader = new BufferedReader(isr);
            String line;
            while ((line = reader.readLine()) != null) {
                stringBuilder.append(line).append(EOL);
            }
            fis.close();
        } catch (java.io.FileNotFoundException e) {
            System.out.println("FileNotFoundException: probably OK");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return stringBuilder.toString();
    }

    public void writeFile(String fileName, String theFile) {
        try {
            Cipher cipher = Cipher.getInstance(AES_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
            byte[] encrypted = cipher.doFinal(theFile.getBytes());
            FileOutputStream fos = new FileOutputStream(fileName);
            fos.write(encrypted);
            fos.flush();
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}