543 lines
24 KiB
Java
543 lines
24 KiB
Java
/*
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* Copyright (C) 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;
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import android.app.Activity;
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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.Intent;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.support.annotation.NonNull;
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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.support.v7.app.AlertDialog;
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import android.text.Editable;
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import android.text.InputType;
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import android.text.TextWatcher;
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import android.text.method.PasswordTransformationMethod;
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import android.view.ContextThemeWrapper;
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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.WindowManager;
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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.Toast;
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import android.widget.ViewAnimator;
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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.pgp.CanonicalizedSecretKey;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKeyRing;
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import org.sufficientlysecure.keychain.pgp.KeyRing;
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import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
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import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
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import org.sufficientlysecure.keychain.provider.KeychainContract;
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import org.sufficientlysecure.keychain.provider.ProviderHelper;
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import org.sufficientlysecure.keychain.provider.ProviderHelper.NotFoundException;
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import org.sufficientlysecure.keychain.remote.CryptoInputParcelCacheService;
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import org.sufficientlysecure.keychain.service.PassphraseCacheService;
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import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
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import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
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import org.sufficientlysecure.keychain.service.input.RequiredInputParcel.RequiredInputType;
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import org.sufficientlysecure.keychain.ui.dialog.CustomAlertDialogBuilder;
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import org.sufficientlysecure.keychain.ui.util.ThemeChanger;
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import org.sufficientlysecure.keychain.ui.widget.CacheTTLSpinner;
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import org.sufficientlysecure.keychain.util.Log;
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import org.sufficientlysecure.keychain.util.Passphrase;
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import org.sufficientlysecure.keychain.util.Preferences;
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/**
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* We can not directly create a dialog on the application context.
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* This activity encapsulates a DialogFragment to emulate a dialog.
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* NOTE: If no CryptoInputParcel is passed via EXTRA_CRYPTO_INPUT, the CryptoInputParcel is created
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* internally and is NOT meant to be used by signing operations before adding a signature time
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*/
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public class PassphraseDialogActivity extends FragmentActivity {
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public static final String RESULT_CRYPTO_INPUT = "result_data";
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public static final String EXTRA_REQUIRED_INPUT = "required_input";
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public static final String EXTRA_CRYPTO_INPUT = "crypto_input";
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// special extra for OpenPgpService
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public static final String EXTRA_SERVICE_INTENT = "data";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// do not allow screenshots of passphrase input
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// to prevent "too easy" passphrase theft by root apps
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if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
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getWindow().setFlags(
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WindowManager.LayoutParams.FLAG_SECURE,
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WindowManager.LayoutParams.FLAG_SECURE
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);
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}
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CryptoInputParcel cryptoInputParcel = getIntent().getParcelableExtra(EXTRA_CRYPTO_INPUT);
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if (cryptoInputParcel == null) {
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cryptoInputParcel = new CryptoInputParcel();
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getIntent().putExtra(EXTRA_CRYPTO_INPUT, cryptoInputParcel);
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}
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// this activity itself has no content view (see manifest)
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RequiredInputParcel requiredInput = getIntent().getParcelableExtra(EXTRA_REQUIRED_INPUT);
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if (requiredInput.mType != RequiredInputType.PASSPHRASE) {
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return;
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}
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// handle empty passphrases by directly returning an empty crypto input parcel
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try {
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CanonicalizedSecretKeyRing pubRing =
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new ProviderHelper(this).getCanonicalizedSecretKeyRing(
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requiredInput.getMasterKeyId());
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// use empty passphrase for empty passphrase
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if (pubRing.getSecretKey(requiredInput.getSubKeyId()).getSecretKeyType() ==
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SecretKeyType.PASSPHRASE_EMPTY) {
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// also return passphrase back to activity
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Intent returnIntent = new Intent();
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cryptoInputParcel.mPassphrase = new Passphrase("");
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returnIntent.putExtra(RESULT_CRYPTO_INPUT, cryptoInputParcel);
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setResult(RESULT_OK, returnIntent);
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finish();
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}
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} catch (NotFoundException e) {
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Log.e(Constants.TAG, "Key not found?!", e);
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setResult(RESULT_CANCELED);
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finish();
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}
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}
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@Override
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protected void onResumeFragments() {
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super.onResumeFragments();
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/* Show 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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PassphraseDialogFragment frag = new PassphraseDialogFragment();
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frag.setArguments(getIntent().getExtras());
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frag.show(getSupportFragmentManager(), "passphraseDialog");
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}
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@Override
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protected void onPause() {
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super.onPause();
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DialogFragment dialog = (DialogFragment) getSupportFragmentManager().findFragmentByTag("passphraseDialog");
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if (dialog != null) {
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dialog.dismiss();
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}
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}
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public static class PassphraseDialogFragment extends DialogFragment implements TextView.OnEditorActionListener {
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private EditText mPassphraseEditText;
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private TextView mPassphraseText;
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private EditText[] mBackupCodeEditText;
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private CanonicalizedSecretKeyRing mSecretRing = null;
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private boolean mIsCancelled = false;
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private RequiredInputParcel mRequiredInput;
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private ViewAnimator mLayout;
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private CacheTTLSpinner mTimeToLiveSpinner;
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@NonNull
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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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ContextThemeWrapper theme = ThemeChanger.getDialogThemeWrapper(activity);
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mRequiredInput = getArguments().getParcelable(EXTRA_REQUIRED_INPUT);
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CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(theme);
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// No title, see http://www.google.com/design/spec/components/dialogs.html#dialogs-alerts
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//alert.setTitle()
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if (mRequiredInput.mType == RequiredInputType.BACKUP_CODE) {
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LayoutInflater inflater = LayoutInflater.from(theme);
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View view = inflater.inflate(R.layout.passphrase_dialog_backup_code, null);
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alert.setView(view);
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mBackupCodeEditText = new EditText[4];
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mBackupCodeEditText[0] = (EditText) view.findViewById(R.id.backup_code_1);
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mBackupCodeEditText[1] = (EditText) view.findViewById(R.id.backup_code_2);
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mBackupCodeEditText[2] = (EditText) view.findViewById(R.id.backup_code_3);
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mBackupCodeEditText[3] = (EditText) view.findViewById(R.id.backup_code_4);
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setupEditTextFocusNext(mBackupCodeEditText);
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AlertDialog dialog = alert.create();
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dialog.setButton(DialogInterface.BUTTON_POSITIVE,
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activity.getString(R.string.btn_unlock), (DialogInterface.OnClickListener) null);
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return dialog;
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}
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LayoutInflater inflater = LayoutInflater.from(theme);
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mLayout = (ViewAnimator) inflater.inflate(R.layout.passphrase_dialog, null);
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alert.setView(mLayout);
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mPassphraseText = (TextView) mLayout.findViewById(R.id.passphrase_text);
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mPassphraseEditText = (EditText) mLayout.findViewById(R.id.passphrase_passphrase);
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View vTimeToLiveLayout = mLayout.findViewById(R.id.remember_layout);
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vTimeToLiveLayout.setVisibility(mRequiredInput.mSkipCaching ? View.GONE : View.VISIBLE);
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mTimeToLiveSpinner = (CacheTTLSpinner) mLayout.findViewById(R.id.ttl_spinner);
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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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String userId;
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CanonicalizedSecretKey.SecretKeyType keyType = CanonicalizedSecretKey.SecretKeyType.PASSPHRASE;
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String message;
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String hint;
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if (mRequiredInput.mType == RequiredInputType.PASSPHRASE_SYMMETRIC) {
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message = getString(R.string.passphrase_for_symmetric_encryption);
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hint = getString(R.string.label_passphrase);
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} else {
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try {
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long subKeyId = mRequiredInput.getSubKeyId();
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ProviderHelper helper = new ProviderHelper(activity);
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mSecretRing = helper.getCanonicalizedSecretKeyRing(
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KeychainContract.KeyRings.buildUnifiedKeyRingsFindBySubkeyUri(subKeyId));
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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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String mainUserId = mSecretRing.getPrimaryUserIdWithFallback();
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KeyRing.UserId mainUserIdSplit = KeyRing.splitUserId(mainUserId);
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if (mainUserIdSplit.name != null) {
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userId = mainUserIdSplit.name;
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} else {
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userId = getString(R.string.user_id_no_name);
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}
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} catch (PgpKeyNotFoundException e) {
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userId = null;
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}
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keyType = mSecretRing.getSecretKey(subKeyId).getSecretKeyType();
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switch (keyType) {
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case PASSPHRASE:
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message = getString(R.string.passphrase_for, userId);
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hint = getString(R.string.label_passphrase);
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break;
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case PIN:
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message = getString(R.string.pin_for, userId);
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hint = getString(R.string.label_pin);
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break;
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case DIVERT_TO_CARD:
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message = getString(R.string.security_token_pin_for, userId);
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hint = getString(R.string.label_pin);
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break;
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// special case: empty passphrase just returns the empty passphrase
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case PASSPHRASE_EMPTY:
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finishCaching(new Passphrase(""));
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default:
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throw new AssertionError("Unhandled SecretKeyType (should not happen)");
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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, mRequiredInput.getSubKeyId()));
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alert.setPositiveButton(android.R.string.ok, new DialogInterface.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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}
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mPassphraseText.setText(message);
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mPassphraseEditText.setHint(hint);
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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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if (getActivity() == null || mPassphraseEditText == null) {
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return;
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}
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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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if ((keyType == CanonicalizedSecretKey.SecretKeyType.DIVERT_TO_CARD && Preferences.getPreferences(activity).useNumKeypadForSecurityTokenPin())
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|| keyType == CanonicalizedSecretKey.SecretKeyType.PIN) {
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mPassphraseEditText.setInputType(InputType.TYPE_CLASS_NUMBER);
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mPassphraseEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
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} else {
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mPassphraseEditText.setRawInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
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}
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mPassphraseEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
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AlertDialog dialog = alert.create();
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dialog.setButton(DialogInterface.BUTTON_POSITIVE,
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activity.getString(R.string.btn_unlock), (DialogInterface.OnClickListener) null);
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return dialog;
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}
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private static void setupEditTextFocusNext(final EditText[] backupCodes) {
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for (int i = 0; i < backupCodes.length - 1; i++) {
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final int next = i + 1;
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backupCodes[i].addTextChangedListener(new TextWatcher() {
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@Override
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public void beforeTextChanged(CharSequence s, int start, int count, int after) {
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}
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@Override
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public void onTextChanged(CharSequence s, int start, int before, int count) {
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boolean inserting = before < count;
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boolean cursorAtEnd = (start + count) == 6;
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if (inserting && cursorAtEnd) {
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backupCodes[next].requestFocus();
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}
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}
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@Override
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public void afterTextChanged(Editable s) {
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}
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});
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}
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}
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@Override
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public void onStart() {
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super.onStart();
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// Override the default behavior so the dialog is NOT dismissed on click
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final Button positive = ((AlertDialog) getDialog()).getButton(DialogInterface.BUTTON_POSITIVE);
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positive.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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if (mRequiredInput.mType == RequiredInputType.BACKUP_CODE) {
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StringBuilder backupCodeInput = new StringBuilder(26);
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for (EditText editText : mBackupCodeEditText) {
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if (editText.getText().length() < 6) {
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return;
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}
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backupCodeInput.append(editText.getText());
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backupCodeInput.append('-');
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}
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backupCodeInput.deleteCharAt(backupCodeInput.length() - 1);
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Passphrase passphrase = new Passphrase(backupCodeInput.toString());
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finishCaching(passphrase);
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return;
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}
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final Passphrase passphrase = new Passphrase(mPassphraseEditText);
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final int timeToLiveSeconds = mTimeToLiveSpinner.getSelectedTimeToLive();
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// Early breakout if we are dealing with a symmetric key
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if (mSecretRing == null) {
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if (!mRequiredInput.mSkipCaching) {
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PassphraseCacheService.addCachedPassphrase(getActivity(),
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Constants.key.symmetric, Constants.key.symmetric, passphrase,
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getString(R.string.passp_cache_notif_pwd), timeToLiveSeconds);
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}
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finishCaching(passphrase);
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return;
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}
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mLayout.setDisplayedChild(1);
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positive.setEnabled(false);
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new AsyncTask<Void, Void, Boolean>() {
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@Override
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protected Boolean doInBackground(Void... params) {
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try {
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// wait some 100ms here, give the user time to appreciate the progress bar
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try {
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Thread.sleep(100);
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} catch (InterruptedException e) {
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// never mind
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}
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// make sure this unlocks
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return mSecretRing.getSecretKey(mRequiredInput.getSubKeyId()).unlock(passphrase);
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} catch (PgpGeneralException e) {
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Toast.makeText(getActivity(), R.string.error_could_not_extract_private_key,
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Toast.LENGTH_SHORT).show();
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getActivity().setResult(RESULT_CANCELED);
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dismiss();
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getActivity().finish();
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return false;
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}
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}
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/** Handle a good or bad passphrase. This happens in the UI thread! */
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@Override
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protected void onPostExecute(Boolean result) {
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super.onPostExecute(result);
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// if we were cancelled in the meantime, the result isn't relevant anymore
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if (mIsCancelled) {
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return;
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}
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// if the passphrase was wrong, reset and re-enable the dialogue
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if (!result) {
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mPassphraseEditText.setText("");
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mPassphraseEditText.setError(getString(R.string.wrong_passphrase));
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mLayout.setDisplayedChild(0);
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positive.setEnabled(true);
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return;
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}
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// cache the new passphrase as specified in CryptoInputParcel
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Log.d(Constants.TAG, "Everything okay!");
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if (mRequiredInput.mSkipCaching) {
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Log.d(Constants.TAG, "Not caching entered passphrase!");
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} else {
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Log.d(Constants.TAG, "Caching entered passphrase");
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try {
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PassphraseCacheService.addCachedPassphrase(getActivity(),
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mSecretRing.getMasterKeyId(), mRequiredInput.getSubKeyId(), passphrase,
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mSecretRing.getPrimaryUserIdWithFallback(), timeToLiveSeconds);
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} catch (PgpKeyNotFoundException e) {
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Log.e(Constants.TAG, "adding of a passphrase failed", e);
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}
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}
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finishCaching(passphrase);
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}
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}.execute();
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}
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});
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}
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private void finishCaching(Passphrase passphrase) {
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// any indication this isn't needed anymore, don't do it.
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if (mIsCancelled || getActivity() == null) {
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return;
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}
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CryptoInputParcel inputParcel = getArguments().getParcelable(EXTRA_CRYPTO_INPUT);
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// noinspection ConstantConditions, we handle the non-null case in PassphraseDialogActivity.onCreate()
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inputParcel.mPassphrase = passphrase;
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Intent serviceIntent = getArguments().getParcelable(EXTRA_SERVICE_INTENT);
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if (serviceIntent != null) {
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CryptoInputParcelCacheService.addCryptoInputParcel(getActivity(), serviceIntent, inputParcel);
|
|
getActivity().setResult(RESULT_OK, serviceIntent);
|
|
} else {
|
|
// also return passphrase back to activity
|
|
Intent returnIntent = new Intent();
|
|
returnIntent.putExtra(RESULT_CRYPTO_INPUT, inputParcel);
|
|
getActivity().setResult(RESULT_OK, returnIntent);
|
|
}
|
|
|
|
dismiss();
|
|
getActivity().finish();
|
|
}
|
|
|
|
@Override
|
|
public void onCancel(DialogInterface dialog) {
|
|
super.onCancel(dialog);
|
|
|
|
// note we need no synchronization here, this variable is only accessed in the ui thread
|
|
mIsCancelled = true;
|
|
|
|
getActivity().setResult(RESULT_CANCELED);
|
|
getActivity().finish();
|
|
}
|
|
|
|
@Override
|
|
public void onDismiss(DialogInterface dialog) {
|
|
super.onDismiss(dialog);
|
|
|
|
hideKeyboard();
|
|
}
|
|
|
|
private void hideKeyboard() {
|
|
if (getActivity() == null) {
|
|
return;
|
|
}
|
|
|
|
InputMethodManager inputManager = (InputMethodManager) getActivity()
|
|
.getSystemService(Context.INPUT_METHOD_SERVICE);
|
|
|
|
inputManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
|
|
}
|
|
|
|
@Override
|
|
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
|
|
// Associate the "done" button on the soft keyboard with the okay button in the view
|
|
if (EditorInfo.IME_ACTION_DONE == actionId) {
|
|
AlertDialog dialog = ((AlertDialog) getDialog());
|
|
Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
|
|
|
|
bt.performClick();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
}
|