diff options
Diffstat (limited to 'org_apg/src/org/thialfihar/android/apg/passphrase/PassphraseCacheService.java')
-rw-r--r-- | org_apg/src/org/thialfihar/android/apg/passphrase/PassphraseCacheService.java | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/org_apg/src/org/thialfihar/android/apg/passphrase/PassphraseCacheService.java b/org_apg/src/org/thialfihar/android/apg/passphrase/PassphraseCacheService.java new file mode 100644 index 000000000..9ef6eedb8 --- /dev/null +++ b/org_apg/src/org/thialfihar/android/apg/passphrase/PassphraseCacheService.java @@ -0,0 +1,103 @@ +/* + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.thialfihar.android.apg.passphrase; + +import org.thialfihar.android.apg.Apg; +import org.thialfihar.android.apg.Preferences; + +import android.app.Service; +import android.content.Context; +import android.content.Intent; +import android.os.Binder; +import android.os.Handler; +import android.os.IBinder; + +public class PassphraseCacheService extends Service { + private final IBinder mBinder = new LocalBinder(); + + public static final String EXTRA_TTL = "ttl"; + + public static void startCacheService(Context context) { + Intent intent = new Intent(context, PassphraseCacheService.class); + intent.putExtra(PassphraseCacheService.EXTRA_TTL, Preferences.getPreferences(context).getPassPhraseCacheTtl()); + context.startService(intent); + } + + private int mPassPhraseCacheTtl = 15; + private Handler mCacheHandler = new Handler(); + private Runnable mCacheTask = new Runnable() { + public void run() { + // check every ttl/2 seconds, which shouldn't be heavy on the device (even if ttl = 15), + // and makes sure the longest a pass phrase survives in the cache is 1.5 * ttl + int delay = mPassPhraseCacheTtl * 1000 / 2; + // also make sure the delay is not longer than one minute + if (delay > 60000) { + delay = 60000; + } + + delay = Apg.cleanUpCache(mPassPhraseCacheTtl, delay); + // don't check too often, even if we were close + if (delay < 5000) { + delay = 5000; + } + + mCacheHandler.postDelayed(this, delay); + } + }; + + static private boolean mIsRunning = false; + + @Override + public void onCreate() { + super.onCreate(); + + mIsRunning = true; + } + + @Override + public void onDestroy() { + super.onDestroy(); + mIsRunning = false; + } + + @Override + public void onStart(Intent intent, int startId) { + super.onStart(intent, startId); + + if (intent != null) { + mPassPhraseCacheTtl = intent.getIntExtra(EXTRA_TTL, 15); + } + if (mPassPhraseCacheTtl < 15) { + mPassPhraseCacheTtl = 15; + } + mCacheHandler.removeCallbacks(mCacheTask); + mCacheHandler.postDelayed(mCacheTask, 1000); + } + + static public boolean isRunning() { + return mIsRunning; + } + + public class LocalBinder extends Binder { + PassphraseCacheService getService() { + return PassphraseCacheService.this; + } + } + + @Override + public IBinder onBind(Intent intent) { + return mBinder; + } +} |