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/*
* Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui.adapter;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.spongycastle.openpgp.PGPKeyRing;
import org.spongycastle.openpgp.PGPObjectFactory;
import org.spongycastle.openpgp.PGPUtil;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.util.InputData;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.PositionAwareInputStream;
import android.content.Context;
import android.support.v4.content.AsyncTaskLoader;
public class ImportKeysListLoader extends AsyncTaskLoader<List<ImportKeysListEntry>> {
Context mContext;
InputData mInputData;
ArrayList<ImportKeysListEntry> data = new ArrayList<ImportKeysListEntry>();
public ImportKeysListLoader(Context context, InputData inputData) {
super(context);
this.mContext = context;
this.mInputData = inputData;
}
@Override
public List<ImportKeysListEntry> loadInBackground() {
if (mInputData == null) {
Log.e(Constants.TAG, "Input data is null!");
return data;
}
generateListOfKeyrings(mInputData);
return data;
}
@Override
protected void onReset() {
super.onReset();
// Ensure the loader is stopped
onStopLoading();
}
@Override
protected void onStartLoading() {
forceLoad();
}
@Override
protected void onStopLoading() {
cancelLoad();
}
@Override
public void deliverResult(List<ImportKeysListEntry> data) {
super.deliverResult(data);
}
/**
* Reads all PGPKeyRing objects from input
*
* @param keyringBytes
* @return
*/
private void generateListOfKeyrings(InputData inputData) {
PositionAwareInputStream progressIn = new PositionAwareInputStream(
inputData.getInputStream());
// need to have access to the bufferedInput, so we can reuse it for the possible
// PGPObject chunks after the first one, e.g. files with several consecutive ASCII
// armour blocks
BufferedInputStream bufferedInput = new BufferedInputStream(progressIn);
try {
// read all available blocks... (asc files can contain many blocks with BEGIN END)
while (bufferedInput.available() > 0) {
InputStream in = PGPUtil.getDecoderStream(bufferedInput);
PGPObjectFactory objectFactory = new PGPObjectFactory(in);
// go through all objects in this block
Object obj;
while ((obj = objectFactory.nextObject()) != null) {
Log.d(Constants.TAG, "Found class: " + obj.getClass());
if (obj instanceof PGPKeyRing) {
PGPKeyRing newKeyring = (PGPKeyRing) obj;
addToData(newKeyring);
} else {
Log.e(Constants.TAG, "Object not recognized as PGPKeyRing!");
}
}
}
} catch (Exception e) {
Log.e(Constants.TAG, "Exception on parsing key file!", e);
}
}
private void addToData(PGPKeyRing keyring) {
ImportKeysListEntry item = new ImportKeysListEntry(keyring);
data.add(item);
}
}
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