open-keychain/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyAdvShareFragment.java
2018-07-02 14:50:11 +02:00

341 lines
15 KiB
Java

/*
* Copyright (C) 2017 Schürmann & Breitmoser GbR
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.security.NoSuchAlgorithmException;
import android.app.Activity;
import android.app.ActivityOptions;
import android.arch.lifecycle.LiveData;
import android.arch.lifecycle.Transformations;
import android.arch.lifecycle.ViewModelProviders;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.PorterDuff;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v7.widget.CardView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.livedata.GenericLiveData;
import org.sufficientlysecure.keychain.model.SubKey.UnifiedKeyInfo;
import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKey;
import org.sufficientlysecure.keychain.pgp.SshPublicKey;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.provider.KeyRepository;
import org.sufficientlysecure.keychain.provider.TemporaryFileProvider;
import org.sufficientlysecure.keychain.ui.ViewKeyAdvActivity.ViewKeyAdvViewModel;
import org.sufficientlysecure.keychain.ui.util.FormattingUtils;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.ui.util.Notify.Style;
import org.sufficientlysecure.keychain.ui.util.QrCodeUtils;
import timber.log.Timber;
public class ViewKeyAdvShareFragment extends Fragment {
private ImageView mQrCode;
private CardView mQrCodeLayout;
private TextView mFingerprintView;
private Bitmap mQrCodeBitmapCache;
private UnifiedKeyInfo unifiedKeyInfo;
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup viewGroup, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.view_key_adv_share_fragment, viewGroup, false);
mFingerprintView = view.findViewById(R.id.view_key_fingerprint);
mQrCode = view.findViewById(R.id.view_key_qr_code);
// We cache the QR code bitmap in its smallest possible size, then scale
// it manually for the correct size whenever the layout of the ImageView
// changes. The fingerprint qr code loader which runs in the background
// just calls requestLayout when it is finished, this way the loader and
// background task are disconnected from any layouting the ImageView may
// undergo. Please note how these six lines are perfectly right-aligned.
mQrCode.addOnLayoutChangeListener((v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom) -> {
// bitmap scaling is expensive, avoid doing it if we already have the correct size!
int mCurrentWidth = 0, mCurrentHeight = 0;
if (mQrCodeBitmapCache != null) {
if (mCurrentWidth == mQrCode.getWidth() && mCurrentHeight == mQrCode.getHeight()) {
return;
}
mCurrentWidth = mQrCode.getWidth();
mCurrentHeight = mQrCode.getHeight();
// scale the image up to our actual size. we do this in code rather
// than let the ImageView do this because we don't require filtering.
Bitmap scaled = Bitmap.createScaledBitmap(mQrCodeBitmapCache,
mCurrentWidth, mCurrentHeight, false);
mQrCode.setImageBitmap(scaled);
}
});
mQrCodeLayout = view.findViewById(R.id.view_key_qr_code_layout);
mQrCodeLayout.setOnClickListener(v -> showQrCodeDialog());
View vFingerprintShareButton = view.findViewById(R.id.view_key_action_fingerprint_share);
View vFingerprintClipboardButton = view.findViewById(R.id.view_key_action_fingerprint_clipboard);
View vKeyShareButton = view.findViewById(R.id.view_key_action_key_share);
View vKeyClipboardButton = view.findViewById(R.id.view_key_action_key_clipboard);
ImageButton vKeySafeSlingerButton = view.findViewById(R.id.view_key_action_key_safeslinger);
View vKeySshShareButton = view.findViewById(R.id.view_key_action_key_ssh_share);
View vKeySshClipboardButton = view.findViewById(R.id.view_key_action_key_ssh_clipboard);
View vKeyUploadButton = view.findViewById(R.id.view_key_action_upload);
vKeySafeSlingerButton.setColorFilter(FormattingUtils.getColorFromAttr(requireContext(), R.attr.colorTertiaryText),
PorterDuff.Mode.SRC_IN);
vFingerprintShareButton.setOnClickListener(v -> shareFingerprint(false));
vFingerprintClipboardButton.setOnClickListener(v -> shareFingerprint(true));
vKeyShareButton.setOnClickListener(v -> shareKey(false, false));
vKeyClipboardButton.setOnClickListener(v -> shareKey(true, false));
vKeySafeSlingerButton.setOnClickListener(v -> startSafeSlinger());
vKeySshShareButton.setOnClickListener(v -> shareKey(false, true));
vKeySshClipboardButton.setOnClickListener(v -> shareKey(true, true));
vKeyUploadButton.setOnClickListener(v -> uploadToKeyserver());
return view;
}
private void startSafeSlinger() {
Intent safeSlingerIntent = new Intent(getActivity(), SafeSlingerActivity.class);
safeSlingerIntent.putExtra(SafeSlingerActivity.EXTRA_MASTER_KEY_ID, unifiedKeyInfo.master_key_id());
startActivityForResult(safeSlingerIntent, 0);
}
private String getShareKeyContent(boolean asSshKey)
throws KeyRepository.NotFoundException, IOException, PgpGeneralException, NoSuchAlgorithmException {
KeyRepository keyRepository = KeyRepository.create(requireContext());
String content;
if (asSshKey) {
long authSubKeyId = unifiedKeyInfo.has_auth_key_int();
CanonicalizedPublicKey publicKey = keyRepository.getCanonicalizedPublicKeyRing(unifiedKeyInfo.master_key_id())
.getPublicKey(authSubKeyId);
SshPublicKey sshPublicKey = new SshPublicKey(publicKey);
content = sshPublicKey.getEncodedKey();
} else {
content = keyRepository.getPublicKeyRingAsArmoredString(unifiedKeyInfo.master_key_id());
}
return content;
}
private void shareKey(boolean toClipboard, boolean asSshKey) {
Activity activity = getActivity();
if (activity == null || unifiedKeyInfo == null) {
return;
}
if (asSshKey && !unifiedKeyInfo.has_auth_key()) {
Notify.create(activity, R.string.authentication_subkey_not_found, Style.ERROR).show();
return;
}
try {
String content = getShareKeyContent(asSshKey);
if (toClipboard) {
ClipboardManager clipMan = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
if (clipMan == null) {
Notify.create(activity, R.string.error_clipboard_copy, Style.ERROR).show();
return;
}
ClipData clip = ClipData.newPlainText(Constants.CLIPBOARD_LABEL, content);
clipMan.setPrimaryClip(clip);
Notify.create(activity, R.string.key_copied_to_clipboard, Notify.Style.OK).show();
return;
}
// let user choose application
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.setType(Constants.MIME_TYPE_KEYS);
// NOTE: Don't use Intent.EXTRA_TEXT to send the key
// better send it via a Uri!
// example: Bluetooth Share will convert text/plain sent via Intent.EXTRA_TEXT to HTML
try {
TemporaryFileProvider shareFileProv = new TemporaryFileProvider();
String filename;
if (unifiedKeyInfo.name() != null) {
filename = unifiedKeyInfo.name();
} else {
filename = KeyFormattingUtils.convertFingerprintToHex(unifiedKeyInfo.fingerprint());
}
Uri contentUri = TemporaryFileProvider.createFile(activity, filename + Constants.FILE_EXTENSION_ASC);
BufferedWriter contentWriter = new BufferedWriter(new OutputStreamWriter(
new ParcelFileDescriptor.AutoCloseOutputStream(
shareFileProv.openFile(contentUri, "w"))));
contentWriter.write(content);
contentWriter.close();
sendIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
} catch (FileNotFoundException e) {
Timber.e(e, "Error creating temporary key share file!");
// no need for a snackbar because one sharing option doesn't work
// Notify.create(getActivity(), R.string.error_temp_file, Notify.Style.ERROR).show();
}
String title = getString(R.string.title_share_key);
Intent shareChooser = Intent.createChooser(sendIntent, title);
startActivity(shareChooser);
} catch (PgpGeneralException | IOException | NoSuchAlgorithmException e) {
Timber.e(e, "error processing key!");
Notify.create(activity, R.string.error_key_processing, Notify.Style.ERROR).show();
} catch (KeyRepository.NotFoundException e) {
Timber.e(e, "key not found!");
Notify.create(activity, R.string.error_key_not_found, Notify.Style.ERROR).show();
}
}
private void shareFingerprint(boolean toClipboard) {
Activity activity = getActivity();
if (activity == null || unifiedKeyInfo == null) {
return;
}
String content;
String fingerprint = KeyFormattingUtils.convertFingerprintToHex(unifiedKeyInfo.fingerprint());
if (!toClipboard) {
content = Constants.FINGERPRINT_SCHEME + ":" + fingerprint;
} else {
content = fingerprint;
}
if (toClipboard) {
ClipboardManager clipMan = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
if (clipMan == null) {
Notify.create(activity, R.string.error_clipboard_copy, Style.ERROR).show();
return;
}
ClipData clip = ClipData.newPlainText(Constants.CLIPBOARD_LABEL, content);
clipMan.setPrimaryClip(clip);
Notify.create(activity, R.string.fingerprint_copied_to_clipboard, Notify.Style.OK).show();
return;
}
// let user choose application
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, content);
sendIntent.setType("text/plain");
String title = getString(R.string.title_share_fingerprint_with);
Intent shareChooser = Intent.createChooser(sendIntent, title);
startActivity(shareChooser);
}
private void showQrCodeDialog() {
Intent qrCodeIntent = new Intent(getActivity(), QrCodeViewActivity.class);
// create the transition animation - the images in the layouts
// of both activities are defined with android:transitionName="qr_code"
Bundle opts = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
ActivityOptions options = ActivityOptions
.makeSceneTransitionAnimation(getActivity(), mQrCodeLayout, "qr_code");
opts = options.toBundle();
}
qrCodeIntent.putExtra(QrCodeViewActivity.EXTRA_MASTER_KEY_ID, unifiedKeyInfo.master_key_id());
ActivityCompat.startActivity(requireActivity(), qrCodeIntent, opts);
}
@Override
public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
ViewKeyAdvViewModel viewModel = ViewModelProviders.of(requireActivity()).get(ViewKeyAdvViewModel.class);
LiveData<UnifiedKeyInfo> unifiedKeyInfoLiveData = viewModel.getUnifiedKeyInfoLiveData(requireContext());
unifiedKeyInfoLiveData.observe(this, this::onLoadUnifiedKeyInfo);
LiveData<Bitmap> qrCodeLiveData = Transformations.switchMap(unifiedKeyInfoLiveData,
(unifiedKeyInfo) -> new GenericLiveData<>(getContext(), null,
() -> {
String fingerprintHex = KeyFormattingUtils.convertFingerprintToHex(unifiedKeyInfo.fingerprint());
Uri uri = new Uri.Builder().scheme(Constants.FINGERPRINT_SCHEME).opaquePart(fingerprintHex).build();
// render with minimal size
return QrCodeUtils.getQRCodeBitmap(uri, 0);
}
));
qrCodeLiveData.observe(this, this::onLoadQrCode);
}
public void onLoadUnifiedKeyInfo(UnifiedKeyInfo unifiedKeyInfo) {
if (unifiedKeyInfo == null) {
return;
}
this.unifiedKeyInfo = unifiedKeyInfo;
final String fingerprint = KeyFormattingUtils.convertFingerprintToHex(unifiedKeyInfo.fingerprint());
mFingerprintView.setText(KeyFormattingUtils.formatFingerprint(fingerprint));
}
private void onLoadQrCode(Bitmap qrCode) {
if (mQrCodeBitmapCache != null) {
return;
}
mQrCodeBitmapCache = qrCode;
if (ViewKeyAdvShareFragment.this.isAdded()) {
mQrCode.requestLayout();
// simple fade-in animation
AlphaAnimation anim = new AlphaAnimation(0.0f, 1.0f);
anim.setDuration(200);
mQrCode.startAnimation(anim);
}
}
private void uploadToKeyserver() {
Intent uploadIntent = new Intent(getActivity(), UploadKeyActivity.class);
uploadIntent.putExtra(UploadKeyActivity.EXTRA_KEY_IDS, new long[] { unifiedKeyInfo.master_key_id() });
startActivityForResult(uploadIntent, 0);
}
}