session-android/src/org/thoughtcrime/securesms/PassphraseRequiredActionBarActivity.java

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package org.thoughtcrime.securesms;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.WindowManager;
import org.thoughtcrime.securesms.crypto.MasterSecret;
import org.thoughtcrime.securesms.crypto.MasterSecretUtil;
import org.thoughtcrime.securesms.service.KeyCachingService;
import org.thoughtcrime.securesms.service.MessageRetrievalService;
import org.thoughtcrime.securesms.util.TextSecurePreferences;
import java.util.Locale;
public abstract class PassphraseRequiredActionBarActivity extends BaseActionBarActivity implements MasterSecretListener {
private static final String TAG = PassphraseRequiredActionBarActivity.class.getSimpleName();
public static final String LOCALE_EXTRA = "locale_extra";
private static final int STATE_NORMAL = 0;
private static final int STATE_CREATE_PASSPHRASE = 1;
private static final int STATE_PROMPT_PASSPHRASE = 2;
private static final int STATE_UPGRADE_DATABASE = 3;
private static final int STATE_PROMPT_PUSH_REGISTRATION = 4;
private BroadcastReceiver clearKeyReceiver;
private boolean isVisible;
@Override
protected final void onCreate(Bundle savedInstanceState) {
onPreCreate();
final MasterSecret masterSecret = KeyCachingService.getMasterSecret(this);
routeApplicationState(masterSecret);
super.onCreate(savedInstanceState);
if (!isFinishing()) {
initializeClearKeyReceiver();
onCreate(savedInstanceState, masterSecret);
}
}
protected void onPreCreate() {}
protected void onCreate(Bundle savedInstanceState, @NonNull MasterSecret masterSecret) {}
@Override
protected void onResume() {
super.onResume();
initializeScreenshotSecurity();
KeyCachingService.registerPassphraseActivityStarted(this);
MessageRetrievalService.registerActivityStarted(this);
isVisible = true;
}
@Override
protected void onPause() {
super.onPause();
KeyCachingService.registerPassphraseActivityStopped(this);
MessageRetrievalService.registerActivityStopped(this);
isVisible = false;
}
@Override
protected void onDestroy() {
super.onDestroy();
removeClearKeyReceiver(this);
}
@Override
public void onMasterSecretCleared() {
Log.w(TAG, "onMasterSecretCleared()");
if (isVisible) routeApplicationState(null);
else finish();
}
protected <T extends Fragment> T initFragment(@IdRes int target,
@NonNull T fragment,
@NonNull MasterSecret masterSecret)
{
return initFragment(target, fragment, masterSecret, null);
}
protected <T extends Fragment> T initFragment(@IdRes int target,
@NonNull T fragment,
@NonNull MasterSecret masterSecret,
@Nullable Locale locale)
{
return initFragment(target, fragment, masterSecret, locale, null);
}
protected <T extends Fragment> T initFragment(@IdRes int target,
@NonNull T fragment,
@NonNull MasterSecret masterSecret,
@Nullable Locale locale,
@Nullable Bundle extras)
{
Bundle args = new Bundle();
args.putParcelable("master_secret", masterSecret);
args.putSerializable(LOCALE_EXTRA, locale);
if (extras != null) {
args.putAll(extras);
}
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction()
.replace(target, fragment)
.commit();
return fragment;
}
private void routeApplicationState(MasterSecret masterSecret) {
Intent intent = getIntentForState(masterSecret, getApplicationState(masterSecret));
if (intent != null) {
startActivity(intent);
finish();
}
}
private Intent getIntentForState(MasterSecret masterSecret, int state) {
Log.w(TAG, "routeApplicationState(), state: " + state);
switch (state) {
case STATE_CREATE_PASSPHRASE: return getCreatePassphraseIntent();
case STATE_PROMPT_PASSPHRASE: return getPromptPassphraseIntent();
case STATE_UPGRADE_DATABASE: return getUpgradeDatabaseIntent(masterSecret);
case STATE_PROMPT_PUSH_REGISTRATION: return getPushRegistrationIntent(masterSecret);
default: return null;
}
}
private int getApplicationState(MasterSecret masterSecret) {
if (!MasterSecretUtil.isPassphraseInitialized(this)) {
return STATE_CREATE_PASSPHRASE;
} else if (masterSecret == null) {
return STATE_PROMPT_PASSPHRASE;
} else if (DatabaseUpgradeActivity.isUpdate(this)) {
return STATE_UPGRADE_DATABASE;
} else if (!TextSecurePreferences.hasPromptedPushRegistration(this)) {
return STATE_PROMPT_PUSH_REGISTRATION;
} else {
return STATE_NORMAL;
}
}
private Intent getCreatePassphraseIntent() {
return getRoutedIntent(PassphraseCreateActivity.class, getIntent(), null);
}
private Intent getPromptPassphraseIntent() {
return getRoutedIntent(PassphrasePromptActivity.class, getIntent(), null);
}
private Intent getUpgradeDatabaseIntent(MasterSecret masterSecret) {
return getRoutedIntent(DatabaseUpgradeActivity.class,
TextSecurePreferences.hasPromptedPushRegistration(this)
? getConversationListIntent()
: getPushRegistrationIntent(masterSecret),
masterSecret);
}
private Intent getPushRegistrationIntent(MasterSecret masterSecret) {
return getRoutedIntent(RegistrationActivity.class, getConversationListIntent(), masterSecret);
}
private Intent getRoutedIntent(Class<?> destination, @Nullable Intent nextIntent, @Nullable MasterSecret masterSecret) {
final Intent intent = new Intent(this, destination);
if (nextIntent != null) intent.putExtra("next_intent", nextIntent);
if (masterSecret != null) intent.putExtra("master_secret", masterSecret);
return intent;
}
private Intent getConversationListIntent() {
return new Intent(this, ConversationListActivity.class);
}
private void initializeScreenshotSecurity() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH &&
TextSecurePreferences.isScreenSecurityEnabled(this))
{
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
} else {
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
}
}
private void initializeClearKeyReceiver() {
Log.w(TAG, "initializeClearKeyReceiver()");
this.clearKeyReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.w(TAG, "onReceive() for clear key event");
onMasterSecretCleared();
}
};
IntentFilter filter = new IntentFilter(KeyCachingService.CLEAR_KEY_EVENT);
registerReceiver(clearKeyReceiver, filter, KeyCachingService.KEY_PERMISSION, null);
}
private void removeClearKeyReceiver(Context context) {
if (clearKeyReceiver != null) {
context.unregisterReceiver(clearKeyReceiver);
clearKeyReceiver = null;
}
}
}