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RegistrationLockDialog.java
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RegistrationLockDialog.java
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package org.thoughtcrime.securesms.lock;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Build;
import android.text.Editable;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.text.style.StyleSpan;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.components.SwitchPreferenceCompat;
import org.thoughtcrime.securesms.dependencies.ApplicationDependencies;
import org.thoughtcrime.securesms.keyvalue.KbsValues;
import org.thoughtcrime.securesms.keyvalue.SignalStore;
import org.thoughtcrime.securesms.logging.Log;
import org.thoughtcrime.securesms.migrations.RegistrationPinV2MigrationJob;
import org.thoughtcrime.securesms.util.FeatureFlags;
import org.thoughtcrime.securesms.util.ServiceUtil;
import org.thoughtcrime.securesms.util.TextSecurePreferences;
import org.thoughtcrime.securesms.util.ThemeUtil;
import org.thoughtcrime.securesms.util.text.AfterTextChanged;
import org.whispersystems.signalservice.api.KeyBackupService;
import org.whispersystems.signalservice.api.KeyBackupServicePinException;
import org.whispersystems.signalservice.api.RegistrationLockData;
import org.whispersystems.signalservice.api.SignalServiceAccountManager;
import org.whispersystems.signalservice.api.kbs.HashedPin;
import org.whispersystems.signalservice.api.kbs.MasterKey;
import org.whispersystems.signalservice.internal.contacts.crypto.UnauthenticatedResponseException;
import org.whispersystems.signalservice.internal.contacts.entities.TokenResponse;
import java.io.IOException;
public final class RegistrationLockDialog {
private static final String TAG = Log.tag(RegistrationLockDialog.class);
private static final int MIN_V2_NUMERIC_PIN_LENGTH_ENTRY = 4;
private static final int MIN_V2_NUMERIC_PIN_LENGTH_SETTING = 4;
public static void showReminderIfNecessary(@NonNull Context context) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return;
if (!RegistrationLockReminders.needsReminder(context)) return;
if (!TextSecurePreferences.isV1RegistrationLockEnabled(context) &&
!SignalStore.kbsValues().isV2RegistrationLockEnabled()) {
// Neither v1 or v2 to check against
Log.w(TAG, "Reg lock enabled, but no pin stored to verify against");
return;
}
AlertDialog dialog = new AlertDialog.Builder(context, ThemeUtil.isDarkTheme(context) ? R.style.RationaleDialogDark : R.style.RationaleDialogLight)
.setView(R.layout.registration_lock_reminder_view)
.setCancelable(true)
.setOnCancelListener(d -> RegistrationLockReminders.scheduleReminder(context, false))
.create();
WindowManager windowManager = ServiceUtil.getWindowManager(context);
Display display = windowManager.getDefaultDisplay();
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
dialog.show();
dialog.getWindow().setLayout((int)(metrics.widthPixels * .80), ViewGroup.LayoutParams.WRAP_CONTENT);
EditText pinEditText = dialog.findViewById(R.id.pin);
TextView reminder = dialog.findViewById(R.id.reminder);
if (pinEditText == null) throw new AssertionError();
if (reminder == null) throw new AssertionError();
SpannableString reminderIntro = new SpannableString(context.getString(R.string.RegistrationLockDialog_reminder));
SpannableString reminderText = new SpannableString(context.getString(R.string.RegistrationLockDialog_registration_lock_is_enabled_for_your_phone_number));
SpannableString forgotText = new SpannableString(context.getString(R.string.RegistrationLockDialog_i_forgot_my_pin));
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(@NonNull View widget) {
dialog.dismiss();
new AlertDialog.Builder(context).setTitle(R.string.RegistrationLockDialog_forgotten_pin)
.setMessage(R.string.RegistrationLockDialog_registration_lock_helps_protect_your_phone_number_from_unauthorized_registration_attempts)
.setPositiveButton(android.R.string.ok, null)
.create()
.show();
}
};
reminderIntro.setSpan(new StyleSpan(Typeface.BOLD), 0, reminderIntro.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
forgotText.setSpan(clickableSpan, 0, forgotText.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
reminder.setText(new SpannableStringBuilder(reminderIntro).append(" ").append(reminderText).append(" ").append(forgotText));
reminder.setMovementMethod(LinkMovementMethod.getInstance());
pinEditText.addTextChangedListener(SignalStore.kbsValues().isV2RegistrationLockEnabled()
? getV2PinWatcher(context, dialog)
: getV1PinWatcher(context, dialog));
}
private static TextWatcher getV1PinWatcher(@NonNull Context context, AlertDialog dialog) {
//noinspection deprecation Acceptable to check the old pin in a reminder on a non-migrated system.
String pin = TextSecurePreferences.getDeprecatedV1RegistrationLockPin(context);
return new AfterTextChanged((Editable s) -> {
if (s != null && s.toString().replace(" ", "").equals(pin)) {
dialog.dismiss();
RegistrationLockReminders.scheduleReminder(context, true);
if (FeatureFlags.kbs()) {
Log.i(TAG, "Pin V1 successfully remembered, scheduling a migration to V2");
ApplicationDependencies.getJobManager().add(new RegistrationPinV2MigrationJob());
}
}
});
}
private static TextWatcher getV2PinWatcher(@NonNull Context context, AlertDialog dialog) {
KbsValues kbsValues = SignalStore.kbsValues();
MasterKey masterKey = kbsValues.getPinBackedMasterKey();
String localPinHash = kbsValues.getLocalPinHash();
if (masterKey == null) throw new AssertionError("No masterKey set at time of reminder");
if (localPinHash == null) throw new AssertionError("No local pin hash set at time of reminder");
return new AfterTextChanged((Editable s) -> {
if (s == null) return;
String pin = s.toString();
if (TextUtils.isEmpty(pin)) return;
if (pin.length() < MIN_V2_NUMERIC_PIN_LENGTH_ENTRY) return;
if (PinHashing.verifyLocalPinHash(localPinHash, pin)) {
dialog.dismiss();
RegistrationLockReminders.scheduleReminder(context, true);
}
});
}
@SuppressLint("StaticFieldLeak")
public static void showRegistrationLockPrompt(@NonNull Context context, @NonNull SwitchPreferenceCompat preference) {
AlertDialog dialog = new AlertDialog.Builder(context)
.setTitle(R.string.RegistrationLockDialog_registration_lock)
.setView(R.layout.registration_lock_dialog_view)
.setPositiveButton(R.string.RegistrationLockDialog_enable, null)
.setNegativeButton(android.R.string.cancel, null)
.create();
dialog.setOnShowListener(created -> {
Button button = ((AlertDialog) created).getButton(AlertDialog.BUTTON_POSITIVE);
button.setOnClickListener(v -> {
EditText pin = dialog.findViewById(R.id.pin);
EditText repeat = dialog.findViewById(R.id.repeat);
ProgressBar progressBar = dialog.findViewById(R.id.progress);
if (pin == null) throw new AssertionError();
if (repeat == null) throw new AssertionError();
if (progressBar == null) throw new AssertionError();
String pinValue = pin.getText().toString().replace(" ", "");
String repeatValue = repeat.getText().toString().replace(" ", "");
if (pinValue.length() < MIN_V2_NUMERIC_PIN_LENGTH_SETTING) {
Toast.makeText(context,
context.getString(R.string.RegistrationLockDialog_the_registration_lock_pin_must_be_at_least_d_digits, MIN_V2_NUMERIC_PIN_LENGTH_SETTING),
Toast.LENGTH_LONG).show();
return;
}
if (!pinValue.equals(repeatValue)) {
Toast.makeText(context, R.string.RegistrationLockDialog_the_two_pins_you_entered_do_not_match, Toast.LENGTH_LONG).show();
return;
}
new AsyncTask<Void, Void, Boolean>() {
@Override
protected void onPreExecute() {
progressBar.setVisibility(View.VISIBLE);
progressBar.setIndeterminate(true);
button.setEnabled(false);
}
@Override
protected Boolean doInBackground(Void... voids) {
try {
if (!FeatureFlags.kbs()) {
Log.i(TAG, "Setting V1 pin");
SignalServiceAccountManager accountManager = ApplicationDependencies.getSignalServiceAccountManager();
accountManager.setPin(pinValue);
TextSecurePreferences.setDeprecatedRegistrationLockPin(context, pinValue);
} else {
Log.i(TAG, "Setting pin on KBS");
KbsValues kbsValues = SignalStore.kbsValues();
MasterKey masterKey = kbsValues.getOrCreateMasterKey();
KeyBackupService keyBackupService = ApplicationDependencies.getKeyBackupService();
KeyBackupService.PinChangeSession pinChangeSession = keyBackupService.newPinChangeSession();
HashedPin hashedPin = PinHashing.hashPin(pinValue, pinChangeSession);
RegistrationLockData kbsData = pinChangeSession.setPin(hashedPin, masterKey);
RegistrationLockData restoredData = keyBackupService.newRestoreSession(kbsData.getTokenResponse())
.restorePin(hashedPin);
if (!restoredData.getMasterKey().equals(masterKey)) {
throw new AssertionError("Failed to set the pin correctly");
} else {
Log.i(TAG, "Set and retrieved pin on KBS successfully");
}
kbsValues.setRegistrationLockMasterKey(restoredData, PinHashing.localPinHash(pinValue));
TextSecurePreferences.clearOldRegistrationLockPin(context);
TextSecurePreferences.setRegistrationLockLastReminderTime(context, System.currentTimeMillis());
TextSecurePreferences.setRegistrationLockNextReminderInterval(context, RegistrationLockReminders.INITIAL_INTERVAL);
}
return true;
} catch (IOException | UnauthenticatedResponseException | KeyBackupServicePinException e) {
Log.w(TAG, e);
return false;
}
}
@Override
protected void onPostExecute(@NonNull Boolean result) {
button.setEnabled(true);
progressBar.setVisibility(View.GONE);
if (result) {
preference.setChecked(true);
created.dismiss();
} else {
Toast.makeText(context, R.string.RegistrationLockDialog_error_connecting_to_the_service, Toast.LENGTH_LONG).show();
}
}
}.execute();
});
});
dialog.show();
}
@SuppressLint("StaticFieldLeak")
public static void showRegistrationUnlockPrompt(@NonNull Context context, @NonNull SwitchPreferenceCompat preference) {
AlertDialog dialog = new AlertDialog.Builder(context)
.setTitle(R.string.RegistrationLockDialog_disable_registration_lock_pin)
.setView(R.layout.registration_unlock_dialog_view)
.setPositiveButton(R.string.RegistrationLockDialog_disable, null)
.setNegativeButton(android.R.string.cancel, null)
.create();
dialog.setOnShowListener(created -> {
Button button = ((AlertDialog) created).getButton(AlertDialog.BUTTON_POSITIVE);
button.setOnClickListener(v -> {
ProgressBar progressBar = dialog.findViewById(R.id.progress);
assert progressBar != null;
new AsyncTask<Void, Void, Boolean>() {
@Override
protected void onPreExecute() {
progressBar.setVisibility(View.VISIBLE);
progressBar.setIndeterminate(true);
button.setEnabled(false);
}
@Override
protected Boolean doInBackground(Void... voids) {
try {
if (!FeatureFlags.kbs()) {
Log.i(TAG, "Removing v1 registration lock pin from server");
ApplicationDependencies.getSignalServiceAccountManager().removeV1Pin();
} else {
Log.i(TAG, "Removing v2 registration lock pin from server");
KbsValues kbsValues = SignalStore.kbsValues();
TokenResponse currentToken = kbsValues.getRegistrationLockTokenResponse();
KeyBackupService keyBackupService = ApplicationDependencies.getKeyBackupService();
keyBackupService.newPinChangeSession(currentToken).removePin();
kbsValues.clearRegistrationLock();
// It is possible a migration has not occurred, in this case, we need to remove the old V1 Pin
if (TextSecurePreferences.isV1RegistrationLockEnabled(context)) {
Log.i(TAG, "Removing v1 registration lock pin from server");
ApplicationDependencies.getSignalServiceAccountManager().removeV1Pin();
}
}
TextSecurePreferences.clearOldRegistrationLockPin(context);
return true;
} catch (IOException | UnauthenticatedResponseException e) {
Log.w(TAG, e);
return false;
}
}
@Override
protected void onPostExecute(Boolean result) {
progressBar.setVisibility(View.GONE);
button.setEnabled(true);
if (result) {
preference.setChecked(false);
created.dismiss();
} else {
Toast.makeText(context, R.string.RegistrationLockDialog_error_connecting_to_the_service, Toast.LENGTH_LONG).show();
}
}
}.execute();
});
});
dialog.show();
}
}