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/*
* Copyright (C) 2015 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.util.ArrayList;
import java.util.Iterator;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.util.Pair;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.FileHelper;
public class BackupRestoreFragment extends Fragment {
// masterKeyId & subKeyId for multi-key export
private Iterator<Pair<Long, Long>> mIdsForRepeatAskPassphrase;
private static final int REQUEST_REPEAT_PASSPHRASE = 0x00007002;
private static final int REQUEST_CODE_INPUT = 0x00007003;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.backup_restore_fragment, container, false);
View backupAll = view.findViewById(R.id.backup_all);
View backupPublicKeys = view.findViewById(R.id.backup_public_keys);
final View restore = view.findViewById(R.id.restore);
backupAll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
exportToFile(true);
}
});
backupPublicKeys.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
exportToFile(false);
}
});
restore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
restore();
}
});
return view;
}
private void exportToFile(boolean includeSecretKeys) {
FragmentActivity activity = getActivity();
if (activity == null) {
return;
}
if (!includeSecretKeys) {
startBackup(false);
return;
}
new AsyncTask<ContentResolver, Void, ArrayList<Pair<Long, Long>>>() {
@Override
protected ArrayList<Pair<Long,Long>> doInBackground(ContentResolver... resolver) {
ArrayList<Pair<Long, Long>> askPassphraseIds = new ArrayList<>();
Cursor cursor = resolver[0].query(
KeyRings.buildUnifiedKeyRingsUri(), new String[]{
KeyRings.MASTER_KEY_ID,
KeyRings.HAS_SECRET,
}, KeyRings.HAS_SECRET + " != 0", null, null);
try {
if (cursor != null) {
while (cursor.moveToNext()) {
SecretKeyType secretKeyType = SecretKeyType.fromNum(cursor.getInt(1));
switch (secretKeyType) {
// all of these make no sense to ask
case PASSPHRASE_EMPTY:
case DIVERT_TO_CARD:
case UNAVAILABLE:
continue;
case GNU_DUMMY: {
Long masterKeyId = cursor.getLong(0);
Long subKeyId = getFirstSubKeyWithPassphrase(masterKeyId, resolver[0]);
if(subKeyId != null) {
askPassphraseIds.add(new Pair<>(masterKeyId, subKeyId));
}
continue;
}
default: {
long masterKeyId = cursor.getLong(0);
askPassphraseIds.add(new Pair<>(masterKeyId, masterKeyId));
}
}
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
return askPassphraseIds;
}
private Long getFirstSubKeyWithPassphrase(long masterKeyId, ContentResolver resolver) {
Cursor cursor = resolver.query(
KeychainContract.Keys.buildKeysUri(masterKeyId), new String[]{
Keys.KEY_ID,
Keys.HAS_SECRET,
}, Keys.HAS_SECRET + " != 0", null, null);
try {
if (cursor != null) {
while(cursor.moveToNext()) {
SecretKeyType secretKeyType = SecretKeyType.fromNum(cursor.getInt(1));
switch (secretKeyType) {
case PASSPHRASE_EMPTY:
case DIVERT_TO_CARD:
case UNAVAILABLE:
return null;
case GNU_DUMMY:
continue;
default: {
return cursor.getLong(0);
}
}
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
return null;
}
@Override
protected void onPostExecute(ArrayList<Pair<Long, Long>> askPassphraseIds) {
super.onPostExecute(askPassphraseIds);
FragmentActivity activity = getActivity();
if (activity == null) {
return;
}
mIdsForRepeatAskPassphrase = askPassphraseIds.iterator();
if (mIdsForRepeatAskPassphrase.hasNext()) {
startPassphraseActivity();
return;
}
startBackup(true);
}
}.execute(activity.getContentResolver());
}
private void startPassphraseActivity() {
Activity activity = getActivity();
if (activity == null) {
return;
}
Intent intent = new Intent(activity, PassphraseDialogActivity.class);
Pair<Long, Long> keyPair = mIdsForRepeatAskPassphrase.next();
long masterKeyId = keyPair.first;
long subKeyId = keyPair.second;
RequiredInputParcel requiredInput =
RequiredInputParcel.createRequiredDecryptPassphrase(masterKeyId, subKeyId);
requiredInput.mSkipCaching = true;
intent.putExtra(PassphraseDialogActivity.EXTRA_REQUIRED_INPUT, requiredInput);
startActivityForResult(intent, REQUEST_REPEAT_PASSPHRASE);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_REPEAT_PASSPHRASE: {
if (resultCode != Activity.RESULT_OK) {
return;
}
if (mIdsForRepeatAskPassphrase.hasNext()) {
startPassphraseActivity();
return;
}
startBackup(true);
break;
}
case REQUEST_CODE_INPUT: {
if (resultCode != Activity.RESULT_OK || data == null) {
return;
}
Uri uri = data.getData();
if (uri == null) {
Notify.create(getActivity(), R.string.no_file_selected, Notify.Style.ERROR).show();
return;
}
Intent intent = new Intent(getActivity(), DecryptActivity.class);
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);
break;
}
default: {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
private void startBackup(boolean exportSecret) {
Intent intent = new Intent(getActivity(), BackupActivity.class);
intent.putExtra(BackupActivity.EXTRA_SECRET, exportSecret);
startActivity(intent);
}
private void restore() {
FileHelper.openDocument(this, null, "*/*", false, REQUEST_CODE_INPUT);
}
}
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