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/*
* Copyright (C) 2014 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;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.widget.Toast;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.intents.OpenKeychainIntents;
import org.sufficientlysecure.keychain.pgp.PgpHelper;
import org.sufficientlysecure.keychain.provider.TemporaryFileProvider;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
public class DecryptActivity extends BaseActivity {
/* Intents */
public static final String ACTION_DECRYPT_FROM_CLIPBOARD = "DECRYPT_DATA_CLIPBOARD";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setFullScreenDialogClose(Activity.RESULT_CANCELED, false);
// Handle intent actions
handleActions(savedInstanceState, getIntent());
}
@Override
protected void initLayout() {
setContentView(R.layout.decrypt_files_activity);
}
/**
* Handles all actions with this intent
*/
private void handleActions(Bundle savedInstanceState, Intent intent) {
// No need to initialize fragments if we are just being restored
if (savedInstanceState != null) {
return;
}
ArrayList<Uri> uris = new ArrayList<>();
String action = intent.getAction();
if (action == null) {
Toast.makeText(this, "Error: No action specified!", Toast.LENGTH_LONG).show();
setResult(Activity.RESULT_CANCELED);
finish();
return;
}
// depending on the data source, we may or may not be able to delete the original file
boolean canDelete = false;
try {
switch (action) {
case Intent.ACTION_SEND: {
// When sending to Keychain Decrypt via share menu
// Binary via content provider (could also be files)
// override uri to get stream from send
if (intent.hasExtra(Intent.EXTRA_STREAM)) {
uris.add(intent.<Uri>getParcelableExtra(Intent.EXTRA_STREAM));
} else if (intent.hasExtra(Intent.EXTRA_TEXT)) {
String text = intent.getStringExtra(Intent.EXTRA_TEXT);
Uri uri = readToTempFile(text);
if (uri != null) {
uris.add(uri);
}
}
break;
}
case Intent.ACTION_SEND_MULTIPLE: {
if (intent.hasExtra(Intent.EXTRA_STREAM)) {
uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
} else if (intent.hasExtra(Intent.EXTRA_TEXT)) {
for (String text : intent.getStringArrayListExtra(Intent.EXTRA_TEXT)) {
Uri uri = readToTempFile(text);
if (uri != null) {
uris.add(uri);
}
}
}
break;
}
case ACTION_DECRYPT_FROM_CLIPBOARD: {
ClipboardManager clipMan = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
if (clipMan == null) {
break;
}
ClipData clip = clipMan.getPrimaryClip();
if (clip == null) {
break;
}
// check if data is available as uri
Uri uri = null;
for (int i = 0; i < clip.getItemCount(); i++) {
ClipData.Item item = clip.getItemAt(i);
Uri itemUri = item.getUri();
if (itemUri != null) {
uri = itemUri;
break;
}
}
// otherwise, coerce to text (almost always possible) and work from there
if (uri == null) {
String text = clip.getItemAt(0).coerceToText(this).toString();
uri = readToTempFile(text);
}
if (uri != null) {
uris.add(uri);
}
break;
}
// for everything else, just work on the intent data
case Intent.ACTION_VIEW:
canDelete = true;
case OpenKeychainIntents.DECRYPT_DATA:
default:
Uri uri = intent.getData();
if (uri != null) {
if ("com.android.email.attachmentprovider".equals(uri.getHost())) {
Toast.makeText(this, R.string.error_reading_aosp, Toast.LENGTH_LONG).show();
finish();
return;
}
uris.add(uri);
}
}
} catch (IOException e) {
Toast.makeText(this, R.string.error_reading_text, Toast.LENGTH_LONG).show();
finish();
return;
}
// Definitely need a data uri with the decrypt_data intent
if (uris.isEmpty()) {
Toast.makeText(this, "No data to decrypt!", Toast.LENGTH_LONG).show();
setResult(Activity.RESULT_CANCELED);
finish();
return;
}
displayListFragment(uris, canDelete);
}
@Nullable
public Uri readToTempFile(String text) throws IOException {
Uri tempFile = TemporaryFileProvider.createFile(this);
OutputStream outStream = getContentResolver().openOutputStream(tempFile);
if (outStream == null) {
return null;
}
// clean up ascii armored message, fixing newlines and stuff
String cleanedText = PgpHelper.getPgpMessageContent(text);
if (cleanedText == null) {
return null;
}
// if cleanup didn't work, just try the raw data
outStream.write(cleanedText.getBytes());
outStream.close();
return tempFile;
}
public void displayListFragment(ArrayList<Uri> inputUris, boolean canDelete) {
DecryptListFragment frag = DecryptListFragment.newInstance(inputUris, canDelete);
FragmentManager fragMan = getSupportFragmentManager();
FragmentTransaction trans = fragMan.beginTransaction();
trans.replace(R.id.decrypt_files_fragment_container, frag);
// if there already is a fragment, allow going back to that. otherwise, we're top level!
if (fragMan.getFragments() != null && !fragMan.getFragments().isEmpty()) {
trans.addToBackStack("list");
}
trans.commit();
}
}
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