1 files changed, 95 insertions, 0 deletions
diff --git a/org_apg/src/org/thialfihar/android/apg/service/PassphraseCacheService.java b/org_apg/src/org/thialfihar/android/apg/service/PassphraseCacheService.java
new file mode 100644
index 000000000..f8b5959ee
--- /dev/null
+++ b/org_apg/src/org/thialfihar/android/apg/service/PassphraseCacheService.java
@@ -0,0 +1,95 @@
+/*
+ * 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.service;
+
+import org.thialfihar.android.apg.Apg;
+
+import android.app.Service;
+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";
+
+    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;
+    }
+}