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Run key derivation for Authenticator Pro importer on background thread
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88
app/src/main/java/com/beemdevelopment/aegis/ui/tasks/PBKDFTask.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package com.beemdevelopment.aegis.ui.tasks; | ||
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| import android.content.Context; | ||
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| import com.beemdevelopment.aegis.R; | ||
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| import java.security.NoSuchAlgorithmException; | ||
| import java.security.spec.InvalidKeySpecException; | ||
| import java.security.spec.KeySpec; | ||
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| import javax.crypto.SecretKey; | ||
| import javax.crypto.SecretKeyFactory; | ||
| import javax.crypto.spec.PBEKeySpec; | ||
| import javax.crypto.spec.SecretKeySpec; | ||
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| public class PBKDFTask extends ProgressDialogTask<PBKDFTask.Params, SecretKey> { | ||
| private final Callback _cb; | ||
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| public PBKDFTask(Context context, Callback cb) { | ||
| super(context, context.getString(R.string.unlocking_vault)); | ||
| _cb = cb; | ||
| } | ||
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| @Override | ||
| protected SecretKey doInBackground(Params... args) { | ||
| setPriority(); | ||
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| Params params = args[0]; | ||
| return deriveKey(params); | ||
| } | ||
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| public static SecretKey deriveKey(Params params) { | ||
| try { | ||
| SecretKeyFactory factory = SecretKeyFactory.getInstance(params.getAlgorithm()); | ||
| KeySpec spec = new PBEKeySpec(params.getPassword(), params.getSalt(), params.getIterations(), params.getKeySize()); | ||
| SecretKey key = factory.generateSecret(spec); | ||
| return new SecretKeySpec(key.getEncoded(), "AES"); | ||
| } catch (NoSuchAlgorithmException | InvalidKeySpecException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| @Override | ||
| protected void onPostExecute(SecretKey key) { | ||
| super.onPostExecute(key); | ||
| _cb.onTaskFinished(key); | ||
| } | ||
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| public interface Callback { | ||
| void onTaskFinished(SecretKey key); | ||
| } | ||
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| public static class Params { | ||
| private final String _algorithm; | ||
| private final int _keySize; | ||
| private final char[] _password; | ||
| private final byte[] _salt; | ||
| private final int _iterations; | ||
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| public Params(String algorithm, int keySize, char[] password, byte[] salt, int iterations) { | ||
| _algorithm = algorithm; | ||
| _keySize = keySize; | ||
| _iterations = iterations; | ||
| _password = password; | ||
| _salt = salt; | ||
| } | ||
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| public String getAlgorithm() { | ||
| return _algorithm; | ||
| } | ||
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| public int getKeySize() { | ||
| return _keySize; | ||
| } | ||
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| public char[] getPassword() { | ||
| return _password; | ||
| } | ||
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| public int getIterations() { | ||
| return _iterations; | ||
| } | ||
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| public byte[] getSalt() { | ||
| return _salt; | ||
| } | ||
| } | ||
| } |