124 lines
4.3 KiB
Java
124 lines
4.3 KiB
Java
/**
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* Copyright (C) 2011 Whisper Systems
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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.thoughtcrime.securesms;
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import android.app.Activity;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.preference.PreferenceManager;
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import android.util.Log;
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import android.view.View;
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import android.widget.Button;
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import org.thoughtcrime.securesms.crypto.KeyExchangeInitiator;
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import org.thoughtcrime.securesms.crypto.MasterSecret;
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import org.thoughtcrime.securesms.crypto.storage.TextSecureSessionStore;
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import org.thoughtcrime.securesms.protocol.Tag;
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import org.thoughtcrime.securesms.recipients.Recipient;
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import org.thoughtcrime.securesms.util.MemoryCleaner;
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import org.thoughtcrime.securesms.util.TextSecurePreferences;
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import org.whispersystems.libaxolotl.state.SessionStore;
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import org.whispersystems.textsecure.api.push.PushAddress;
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/**
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* Activity which prompts the user to initiate a secure
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* session. Initiated by whitespace tag detection from
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* the remote endpoint.
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*
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* @author Moxie Marlinspike
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*
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*/
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public class AutoInitiateActivity extends Activity {
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private long threadId;
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private Recipient recipient;
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private MasterSecret masterSecret;
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@Override
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public void onCreate(Bundle icicle) {
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super.onCreate(icicle);
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setContentView(R.layout.auto_initiate_activity);
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initializeResources();
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}
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@Override
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public void onDestroy() {
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MemoryCleaner.clean(masterSecret);
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super.onDestroy();
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}
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private void initializeResources() {
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this.threadId = this.getIntent().getLongExtra("threadId", -1);
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this.recipient = this.getIntent().getParcelableExtra("recipient");
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this.masterSecret = this.getIntent().getParcelableExtra("masterSecret");
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((Button)findViewById(R.id.initiate_button)).setOnClickListener(new OkListener());
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((Button)findViewById(R.id.cancel_button)).setOnClickListener(new CancelListener());
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}
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private void initiateKeyExchange() {
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KeyExchangeInitiator.initiate(this, masterSecret, recipient, true);
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finish();
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}
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private class OkListener implements View.OnClickListener {
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@Override
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public void onClick(View v) {
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initiateKeyExchange();
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}
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}
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private class CancelListener implements View.OnClickListener {
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@Override
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public void onClick(View v) {
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Log.w("AutoInitiateActivity", "Exempting threadID: " + threadId);
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exemptThread(AutoInitiateActivity.this, threadId);
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AutoInitiateActivity.this.finish();
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}
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}
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public static void exemptThread(Context context, long threadId) {
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SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
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sp.edit().putBoolean("pref_thread_auto_init_exempt_" + threadId, true).apply();
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}
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public static boolean isValidAutoInitiateSituation(Context context, MasterSecret masterSecret,
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Recipient recipient, String message, long threadId)
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{
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return
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Tag.isTagged(message) &&
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TextSecurePreferences.isPushRegistered(context) &&
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isThreadQualified(context, threadId) &&
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isExchangeQualified(context, masterSecret, recipient);
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}
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private static boolean isThreadQualified(Context context, long threadId) {
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SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
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return !sp.getBoolean("pref_thread_auto_init_exempt_" + threadId, false);
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}
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private static boolean isExchangeQualified(Context context,
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MasterSecret masterSecret,
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Recipient recipient)
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{
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SessionStore sessionStore = new TextSecureSessionStore(context, masterSecret);
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return sessionStore.containsSession(recipient.getRecipientId(), PushAddress.DEFAULT_DEVICE_ID);
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}
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}
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