364 lines
14 KiB
Java
364 lines
14 KiB
Java
/*
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* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.ui.dialog;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.app.Dialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.DialogInterface.OnClickListener;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.os.Messenger;
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import android.os.RemoteException;
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import android.support.v4.app.DialogFragment;
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import android.support.v4.app.FragmentActivity;
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import android.view.KeyEvent;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputMethodManager;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.TextView;
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import android.widget.TextView.OnEditorActionListener;
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import android.widget.Toast;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.R;
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import org.sufficientlysecure.keychain.compatibility.DialogFragmentWorkaround;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKeyRing;
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import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
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import org.sufficientlysecure.keychain.provider.ProviderHelper;
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import org.sufficientlysecure.keychain.service.PassphraseCacheService;
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import org.sufficientlysecure.keychain.util.Log;
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public class PassphraseDialogFragment extends DialogFragment implements OnEditorActionListener {
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private static final String ARG_MESSENGER = "messenger";
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private static final String ARG_SECRET_KEY_ID = "secret_key_id";
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public static final int MESSAGE_OKAY = 1;
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public static final int MESSAGE_CANCEL = 2;
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public static final String MESSAGE_DATA_PASSPHRASE = "passphrase";
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private Messenger mMessenger;
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private EditText mPassphraseEditText;
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/**
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* Shows passphrase dialog to cache a new passphrase the user enters for using it later for
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* encryption. Based on mSecretKeyId it asks for a passphrase to open a private key or it asks
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* for a symmetric passphrase
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*/
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public static void show(final FragmentActivity context, final long keyId, final Handler returnHandler) {
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// Create a new Messenger for the communication back
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final Messenger messenger = new Messenger(returnHandler);
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DialogFragmentWorkaround.INTERFACE.runnableRunDelayed(new Runnable() {
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public void run() {
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try {
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PassphraseDialogFragment passphraseDialog = PassphraseDialogFragment.newInstance(context,
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messenger, keyId);
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passphraseDialog.show(context.getSupportFragmentManager(), "passphraseDialog");
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} catch (PgpGeneralException e) {
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Log.d(Constants.TAG, "No passphrase for this secret key!");
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// send message to handler to start encryption directly
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returnHandler.sendEmptyMessage(PassphraseDialogFragment.MESSAGE_OKAY);
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}
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}
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});
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}
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/**
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* Creates new instance of this dialog fragment
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*
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* @param secretKeyId secret key id you want to use
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* @param messenger to communicate back after caching the passphrase
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* @return
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* @throws PgpGeneralException
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*/
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public static PassphraseDialogFragment newInstance(Context context, Messenger messenger,
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long secretKeyId) throws PgpGeneralException {
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// check if secret key has a passphrase
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if (!(secretKeyId == Constants.key.symmetric || secretKeyId == Constants.key.none)) {
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try {
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if (!new ProviderHelper(context).getCanonicalizedSecretKeyRing(secretKeyId).hasPassphrase()) {
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throw new PgpGeneralException("No passphrase! No passphrase dialog needed!");
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}
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} catch (ProviderHelper.NotFoundException e) {
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throw new PgpGeneralException("Error: Key not found!", e);
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}
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}
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PassphraseDialogFragment frag = new PassphraseDialogFragment();
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Bundle args = new Bundle();
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args.putLong(ARG_SECRET_KEY_ID, secretKeyId);
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args.putParcelable(ARG_MESSENGER, messenger);
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frag.setArguments(args);
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return frag;
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}
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/**
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* Creates dialog
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*/
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@Override
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public Dialog onCreateDialog(Bundle savedInstanceState) {
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final Activity activity = getActivity();
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final long secretKeyId = getArguments().getLong(ARG_SECRET_KEY_ID);
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mMessenger = getArguments().getParcelable(ARG_MESSENGER);
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CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);
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alert.setTitle(R.string.title_authentication);
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final CanonicalizedSecretKeyRing secretRing;
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String userId;
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if (secretKeyId == Constants.key.symmetric || secretKeyId == Constants.key.none) {
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alert.setMessage(R.string.passphrase_for_symmetric_encryption);
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secretRing = null;
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} else {
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try {
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ProviderHelper helper = new ProviderHelper(activity);
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secretRing = helper.getCanonicalizedSecretKeyRing(secretKeyId);
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// yes the inner try/catch block is necessary, otherwise the final variable
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// above can't be statically verified to have been set in all cases because
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// the catch clause doesn't return.
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try {
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userId = secretRing.getPrimaryUserIdWithFallback();
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} catch (PgpGeneralException e) {
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userId = null;
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}
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} catch (ProviderHelper.NotFoundException e) {
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alert.setTitle(R.string.title_key_not_found);
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alert.setMessage(getString(R.string.key_not_found, secretKeyId));
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alert.setPositiveButton(android.R.string.ok, new OnClickListener() {
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public void onClick(DialogInterface dialog, int which) {
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dismiss();
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}
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});
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alert.setCancelable(false);
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return alert.create();
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}
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Log.d(Constants.TAG, "User id: '" + userId + "'");
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alert.setMessage(getString(R.string.passphrase_for, userId));
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}
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LayoutInflater inflater = activity.getLayoutInflater();
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View view = inflater.inflate(R.layout.passphrase_dialog, null);
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alert.setView(view);
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mPassphraseEditText = (EditText) view.findViewById(R.id.passphrase_passphrase);
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alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int id) {
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dismiss();
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String passphrase = mPassphraseEditText.getText().toString();
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// Early breakout if we are dealing with a symmetric key
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if (secretRing == null) {
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PassphraseCacheService.addCachedPassphrase(activity, Constants.key.symmetric,
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passphrase, getString(R.string.passp_cache_notif_pwd));
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// also return passphrase back to activity
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Bundle data = new Bundle();
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data.putString(MESSAGE_DATA_PASSPHRASE, passphrase);
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sendMessageToHandler(MESSAGE_OKAY, data);
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return;
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}
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CanonicalizedSecretKey unlockedSecretKey = null;
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for (CanonicalizedSecretKey clickSecretKey : secretRing.secretKeyIterator()) {
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try {
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boolean unlocked = clickSecretKey.unlock(passphrase);
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if (unlocked) {
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unlockedSecretKey = clickSecretKey;
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break;
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}
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} catch (PgpGeneralException e) {
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Toast.makeText(activity, R.string.error_could_not_extract_private_key,
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Toast.LENGTH_SHORT).show();
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sendMessageToHandler(MESSAGE_CANCEL);
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return; // ran out of keys to try
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}
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}
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// Means we got an exception every time
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if (unlockedSecretKey == null) {
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Toast.makeText(activity, R.string.wrong_passphrase,
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Toast.LENGTH_SHORT).show();
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sendMessageToHandler(MESSAGE_CANCEL);
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return;
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}
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long masterKeyId = secretRing.getMasterKeyId();
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// cache the new passphrase
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Log.d(Constants.TAG, "Everything okay! Caching entered passphrase");
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try {
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PassphraseCacheService.addCachedPassphrase(activity, masterKeyId, passphrase,
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secretRing.getPrimaryUserIdWithFallback());
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} catch (PgpGeneralException e) {
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Log.e(Constants.TAG, "adding of a passphrase failed", e);
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}
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if (unlockedSecretKey.getKeyId() != masterKeyId) {
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PassphraseCacheService.addCachedPassphrase(
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activity, unlockedSecretKey.getKeyId(), passphrase,
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unlockedSecretKey.getPrimaryUserIdWithFallback());
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}
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// also return passphrase back to activity
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Bundle data = new Bundle();
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data.putString(MESSAGE_DATA_PASSPHRASE, passphrase);
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sendMessageToHandler(MESSAGE_OKAY, data);
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}
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});
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alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int id) {
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dialog.cancel();
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}
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});
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// Hack to open keyboard.
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// This is the only method that I found to work across all Android versions
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// http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
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// Notes: * onCreateView can't be used because we want to add buttons to the dialog
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// * opening in onActivityCreated does not work on Android 4.4
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mPassphraseEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
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@Override
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public void onFocusChange(View v, boolean hasFocus) {
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mPassphraseEditText.post(new Runnable() {
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@Override
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public void run() {
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InputMethodManager imm = (InputMethodManager) getActivity()
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.getSystemService(Context.INPUT_METHOD_SERVICE);
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imm.showSoftInput(mPassphraseEditText, InputMethodManager.SHOW_IMPLICIT);
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}
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});
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}
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});
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mPassphraseEditText.requestFocus();
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mPassphraseEditText.setImeActionLabel(getString(android.R.string.ok), EditorInfo.IME_ACTION_DONE);
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mPassphraseEditText.setOnEditorActionListener(this);
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return alert.show();
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}
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@Override
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public void onCancel(DialogInterface dialog) {
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super.onCancel(dialog);
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dismiss();
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sendMessageToHandler(MESSAGE_CANCEL);
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}
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@Override
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public void onDismiss(DialogInterface dialog) {
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super.onDismiss(dialog);
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Log.d(Constants.TAG, "onDismiss");
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// hide keyboard on dismiss
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hideKeyboard();
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}
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private void hideKeyboard() {
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InputMethodManager inputManager = (InputMethodManager) getActivity()
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.getSystemService(Context.INPUT_METHOD_SERVICE);
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//check if no view has focus:
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View v = getActivity().getCurrentFocus();
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if (v == null)
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return;
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inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
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}
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/**
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* Associate the "done" button on the soft keyboard with the okay button in the view
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*/
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@Override
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public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
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if (EditorInfo.IME_ACTION_DONE == actionId) {
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AlertDialog dialog = ((AlertDialog) getDialog());
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Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
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bt.performClick();
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return true;
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}
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return false;
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}
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/**
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* Send message back to handler which is initialized in a activity
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*
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* @param what Message integer you want to send
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*/
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private void sendMessageToHandler(Integer what) {
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Message msg = Message.obtain();
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msg.what = what;
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try {
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mMessenger.send(msg);
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} catch (RemoteException e) {
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Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
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} catch (NullPointerException e) {
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Log.w(Constants.TAG, "Messenger is null!", e);
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}
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}
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/**
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* Send message back to handler which is initialized in a activity
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*
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* @param what Message integer you want to send
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*/
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private void sendMessageToHandler(Integer what, Bundle data) {
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Message msg = Message.obtain();
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msg.what = what;
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if (data != null) {
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msg.setData(data);
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}
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try {
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mMessenger.send(msg);
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} catch (RemoteException e) {
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Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
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} catch (NullPointerException e) {
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Log.w(Constants.TAG, "Messenger is null!", e);
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}
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}
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}
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