android 的 Facebook 隐藏加密始终不可用

Question

我无法在我的 android 应用程序中使用 Facebook Conceal 库。 crypto 在 crypto.isAvailable() 上似乎总是 return 正确。此外，我使用的 Android 1.0.2 没有明确列出所包含的库，但我已将其放在正确的 libs 文件夹中。

我包含了上一个 link 中可用的 Jar 和本机二进制文件。 .zip 文件包含在构建中：

compile fileTree(dir: 'libs', include: ['*.jar', '*.zip'])

构建似乎有效。我验证了本机库：cryptox.so 和 conceal.so 包含在 apk/libs 中，而其他包含 com.facebook.crypto 等包的 jar 二进制文件包含在 classes.dex 中。

以下是activity代码：

import com.facebook.crypto.Crypto;
import com.facebook.crypto.Entity;
import com.facebook.crypto.keychain.SharedPrefsBackedKeyChain;
import com.facebook.crypto.util.SystemNativeCryptoLibrary;

public class ConcealActivity extends Activity implements View.OnClickListener {
public static String filename = "data.txt";
public static String filepath = "concealedata";
public static String TAG = "com.zing.ConcealActivity";
File myInternalFile;
Crypto crypto;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_conceal);

    Log.i(TAG, "created method.");
    ContextWrapper contextWrapper = new ContextWrapper(getApplicationContext());
    File directory = contextWrapper.getDir(filepath, Context.MODE_PRIVATE);
    myInternalFile = new File(directory, filename);
    crypto = new Crypto(new SharedPrefsBackedKeyChain(this), new SystemNativeCryptoLibrary());
    Button cencrypt = (Button) findViewById(R.id.cencrypt);
    cencrypt.setOnClickListener(this);

    Button cdecrypt = (Button) findViewById(R.id.cdecrypt);
    cdecrypt.setOnClickListener(this);
}

@Override
public void onClick(View v) {
    Log.i(TAG, "onclick method.");
    EditText myInputText = (EditText) findViewById(R.id.inputText);
    TextView responseText = (TextView) findViewById(R.id.responseText);
    String myData = "";

    switch (v.getId()) {
        case R.id.cencrypt:
            encryptandsave(myInputText.getText().toString().getBytes());
            myInputText.setText("");
            responseText.setText(readFile(myInternalFile));
            break;

        case R.id.cdecrypt:
            responseText.setText(readanddecrypt());
            break;
    }
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_conceal, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

// 下面的第一个条件总是满足意味着库没有正确加载。

// Encrypts the data and saves to directory
public void encryptandsave(byte[] plainTextBytes) {
    try {
    // Check for whether the crypto functionality is available
    // This might fail if android does not load libaries correctly.
        if (!crypto.isAvailable()) {
            Log.e(TAG, "Cipher unavailable.");
            return;
        }

        OutputStream fileStream = new BufferedOutputStream(new FileOutputStream(myInternalFile));
        OutputStream outputStream = crypto.getCipherOutputStream(fileStream, new Entity("Password"));
        outputStream.write(plainTextBytes);
        outputStream.close();
    } catch (Exception e) {
        Log.e(TAG, "EXCEPTION encryptandsave: " + e.getMessage());
    }
}

// decode encrypted file and returns Bitmap
private String readanddecrypt() {
    try {
        if (!crypto.isAvailable()) {
            Log.e(TAG, "Cipher unavailable.");
            return "";
        }
        FileInputStream fileStream = new FileInputStream(filename);
        InputStream inputStream = crypto.getCipherInputStream(fileStream, new Entity("Password"));
        ByteArrayOutputStream out = new ByteArrayOutputStream();

        int read;
        byte[] buffer = new byte[1024];
        while ((read = inputStream.read(buffer)) != -1) {
            out.write(buffer, 0, read);
        }
        inputStream.close();
        return out.toString();
    } catch (Exception e) {
        Log.e(TAG, "EXCEPTION readanddecrypt: " + e.getMessage());
    }
    return null;
}

public String readFile(File internalFile) {
    StringBuilder sb = new StringBuilder();
    try {
        FileInputStream fis = new FileInputStream(internalFile);
        DataInputStream in = new DataInputStream(fis);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String strLine;
        while ((strLine = br.readLine()) != null) {
            sb.append(strLine);
        }
        in.close();
    } catch (IOException e) {
        Log.e(TAG, "EXCEPTION readFile: " + e.getMessage());
        return "";
    }
    return sb.toString();
}

}

我不确定库或代码是否有问题。

在 jar 中，代码似乎在

中失败

com.facebook.crypto.util.SystemNativeCryptoLibrary.java

private static final ArrayList<String> LIBS = new ArrayList<String>() {{
  add("cryptox");
  add("conceal");
}};

// 在执行下面这一段时抛出 java.lang.UnsatisfiedLinkError 异常：

for (String name : LIBS) {
  System.loadLibrary(name);

Answer 1

Assaf's solution 是有效的。
下面是库需要进入的结构。
项目：
|--库:
|--|--armeabi:
|--|--|--.so 文件。

请注意，下载的 libs.zip 中的所有库文件都压缩在 libs 根文件夹中，需要将其更改为 lib 以便将库正确捆绑在 .apk

Answer 2

你可以尝试将.so文件相应地放到/app/src/main/jniLibs/下。

app
+-src
  +-main
    +-jniLibs
      +-armeabi
      | +-libconceal.so
      +-armeabi-v7a
      | +-libconceal.so
      +-mips
      +-x86
        +-libconceal.so

android 的 Facebook 隐藏加密始终不可用

Facebook Conceal crypto for android is always unavailable

android

encryption