/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* 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 android.app.ActivityOptions;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.PorterDuff;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
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.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.pgp.UncachedKeyRing;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.provider.TemporaryStorageProvider;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.ui.util.QrCodeUtils;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.NfcHelper;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.IOException;
import java.io.FileNotFoundException;
public class ViewKeyAdvShareFragment extends LoaderFragment implements
LoaderManager.LoaderCallbacks<Cursor> {
public static final String ARG_DATA_URI = "uri";
private TextView mFingerprint;
private ImageView mQrCode;
private CardView mQrCodeLayout;
private View mFingerprintShareButton;
private View mFingerprintClipboardButton;
private View mKeyShareButton;
private View mKeyClipboardButton;
private View mKeyNfcButton;
private ImageButton mKeySafeSlingerButton;
private View mKeyUploadButton;
ProviderHelper mProviderHelper;
NfcHelper mNfcHelper;
private static final int LOADER_ID_UNIFIED = 0;
private Uri mDataUri;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup superContainer, Bundle savedInstanceState) {
View root = super.onCreateView(inflater, superContainer, savedInstanceState);
View view = inflater.inflate(R.layout.view_key_adv_share_fragment, getContainer());
mProviderHelper = new ProviderHelper(ViewKeyAdvShareFragment.this.getActivity());
mNfcHelper = new NfcHelper(getActivity(), mProviderHelper);
mFingerprint = (TextView) view.findViewById(R.id.view_key_fingerprint);
mQrCode = (ImageView) view.findViewById(R.id.view_key_qr_code);
mQrCodeLayout = (CardView) view.findViewById(R.id.view_key_qr_code_layout);
mFingerprintShareButton = view.findViewById(R.id.view_key_action_fingerprint_share);
mFingerprintClipboardButton = view.findViewById(R.id.view_key_action_fingerprint_clipboard);
mKeyShareButton = view.findViewById(R.id.view_key_action_key_share);
mKeyNfcButton = view.findViewById(R.id.view_key_action_key_nfc);
mKeyClipboardButton = view.findViewById(R.id.view_key_action_key_clipboard);
mKeySafeSlingerButton = (ImageButton) view.findViewById(R.id.view_key_action_key_safeslinger);
mKeyUploadButton = view.findViewById(R.id.view_key_action_upload);
mKeySafeSlingerButton.setColorFilter(getResources().getColor(R.color.tertiary_text_light),
PorterDuff.Mode.SRC_IN);
mQrCodeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showQrCodeDialog();
}
});
mFingerprintShareButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
share(mDataUri, mProviderHelper, true, false);
}
});
mFingerprintClipboardButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
share(mDataUri, mProviderHelper, true, true);
}
});
mKeyShareButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
share(mDataUri, mProviderHelper, false, false);
}
});
mKeyClipboardButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
share(mDataUri, mProviderHelper, false, true);
}
});
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mKeyNfcButton.setVisibility(View.VISIBLE);
mKeyNfcButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mNfcHelper.invokeNfcBeam();
}
});
} else {
mKeyNfcButton.setVisibility(View.GONE);
}
mKeySafeSlingerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startSafeSlinger(mDataUri);
}
});
mKeyUploadButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
uploadToKeyserver();
}
});
return root;
}
private void startSafeSlinger(Uri dataUri) {
long keyId = 0;
try {
keyId = new ProviderHelper(getActivity())
.getCachedPublicKeyRing(dataUri)
.extractOrGetMasterKeyId();
} catch (PgpKeyNotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
Intent safeSlingerIntent = new Intent(getActivity(), SafeSlingerActivity.class);
safeSlingerIntent.putExtra(SafeSlingerActivity.EXTRA_MASTER_KEY_ID, keyId);
startActivityForResult(safeSlingerIntent, 0);
}
private void share(Uri dataUri, ProviderHelper providerHelper, boolean fingerprintOnly,
boolean toClipboard) {
try {
String content;
byte[] fingerprintData = (byte[]) providerHelper.getGenericData(
KeyRings.buildUnifiedKeyRingUri(dataUri),
Keys.FINGERPRINT, ProviderHelper.FIELD_TYPE_BLOB);
if (fingerprintOnly) {
String fingerprint = KeyFormattingUtils.convertFingerprintToHex(fingerprintData);
if (!toClipboard) {
content = Constants.FINGERPRINT_SCHEME + ":" + fingerprint;
} else {
content = fingerprint;
}
} else {
Uri uri = KeychainContract.KeyRingData.buildPublicKeyRingUri(dataUri);
// get public keyring as ascii armored string
content = providerHelper.getKeyRingAsArmoredString(uri);
}
if (toClipboard) {
ClipboardReflection.copyToClipboard(getActivity(), content);
String message;
if (fingerprintOnly) {
message = getResources().getString(R.string.fingerprint_copied_to_clipboard);
} else {
message = getResources().getString(R.string.key_copied_to_clipboard);
}
Notify.create(getActivity(), message, Notify.Style.OK).show();
} else {
// Android will fail with android.os.TransactionTooLargeException if key is too big
// see http://www.lonestarprod.com/?p=34
if (content.length() >= 86389) {
Notify.create(getActivity(), R.string.key_too_big_for_sharing,
Notify.Style.ERROR).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;
if (fingerprintOnly) {
title = getResources().getString(R.string.title_share_fingerprint_with);
} else {
title = getResources().getString(R.string.title_share_key);
}
Intent shareChooser = Intent.createChooser(sendIntent, title);
// Bluetooth Share will convert text/plain sent via EXTRA_TEXT to HTML
// Add replacement extra to send a text/plain file instead.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
try {
String primaryUserId = UncachedKeyRing.decodeFromData(content.getBytes()).
getPublicKey().getPrimaryUserIdWithFallback();
TemporaryStorageProvider shareFileProv = new TemporaryStorageProvider();
Uri contentUri = TemporaryStorageProvider.createFile(getActivity(),
primaryUserId + Constants.FILE_EXTENSION_ASC);
BufferedWriter contentWriter = new BufferedWriter(new OutputStreamWriter(
new ParcelFileDescriptor.AutoCloseOutputStream(
shareFileProv.openFile(contentUri, "w"))));
contentWriter.write(content);
contentWriter.close();
// create replacement extras inside try{}:
// if file creation fails, just don't add the replacements
Bundle replacements = new Bundle();
shareChooser.putExtra(Intent.EXTRA_REPLACEMENT_EXTRAS, replacements);
Bundle bluetoothExtra = new Bundle(sendIntent.getExtras());
replacements.putBundle("com.android.bluetooth", bluetoothExtra);
bluetoothExtra.putParcelable(Intent.EXTRA_STREAM, contentUri);
} catch (FileNotFoundException e) {
Log.e(Constants.TAG, "error creating temporary Bluetooth key share file!", e);
Notify.create(getActivity(), R.string.error_bluetooth_file, Notify.Style.ERROR).show();
}
}
startActivity(shareChooser);
}
} catch (PgpGeneralException | IOException e) {
Log.e(Constants.TAG, "error processing key!", e);
Notify.create(getActivity(), R.string.error_key_processing, Notify.Style.ERROR).show();
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
Notify.create(getActivity(), R.string.error_key_not_found, Notify.Style.ERROR).show();
}
}
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.setData(mDataUri);
ActivityCompat.startActivity(getActivity(), qrCodeIntent, opts);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Uri dataUri = getArguments().getParcelable(ARG_DATA_URI);
if (dataUri == null) {
Log.e(Constants.TAG, "Data missing. Should be Uri of key!");
getActivity().finish();
return;
}
loadData(dataUri);
}
private void loadData(Uri dataUri) {
mDataUri = dataUri;
Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString());
// Prepare the loaders. Either re-connect with an existing ones,
// or start new ones.
getLoaderManager().initLoader(LOADER_ID_UNIFIED, null, this);
// Prepare the NfcHelper
mNfcHelper.initNfc(mDataUri);
}
static final String[] UNIFIED_PROJECTION = new String[] {
KeyRings._ID, KeyRings.MASTER_KEY_ID, KeyRings.HAS_ANY_SECRET,
KeyRings.USER_ID, KeyRings.FINGERPRINT,
KeyRings.ALGORITHM, KeyRings.KEY_SIZE, KeyRings.CREATION, KeyRings.IS_EXPIRED,
};
static final int INDEX_UNIFIED_MASTER_KEY_ID = 1;
static final int INDEX_UNIFIED_HAS_ANY_SECRET = 2;
static final int INDEX_UNIFIED_USER_ID = 3;
static final int INDEX_UNIFIED_FINGERPRINT = 4;
static final int INDEX_UNIFIED_ALGORITHM = 5;
static final int INDEX_UNIFIED_KEY_SIZE = 6;
static final int INDEX_UNIFIED_CREATION = 7;
static final int INDEX_UNIFIED_ID_EXPIRED = 8;
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
setContentShown(false);
switch (id) {
case LOADER_ID_UNIFIED: {
Uri baseUri = KeyRings.buildUnifiedKeyRingUri(mDataUri);
return new CursorLoader(getActivity(), baseUri, UNIFIED_PROJECTION, null, null, null);
}
default:
return null;
}
}
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
/* TODO better error handling? May cause problems when a key is deleted,
* because the notification triggers faster than the activity closes.
*/
// Avoid NullPointerExceptions...
if (data.getCount() == 0) {
return;
}
// Swap the new cursor in. (The framework will take care of closing the
// old cursor once we return.)
switch (loader.getId()) {
case LOADER_ID_UNIFIED: {
if (data.moveToFirst()) {
byte[] fingerprintBlob = data.getBlob(INDEX_UNIFIED_FINGERPRINT);
String fingerprint = KeyFormattingUtils.convertFingerprintToHex(fingerprintBlob);
mFingerprint.setText(KeyFormattingUtils.colorizeFingerprint(fingerprint));
loadQrCode(fingerprint);
break;
}
}
}
setContentShown(true);
}
/**
* This is called when the last Cursor provided to onLoadFinished() above is about to be closed.
* We need to make sure we are no longer using it.
*/
public void onLoaderReset(Loader<Cursor> loader) {
}
/**
* Load QR Code asynchronously and with a fade in animation
*
* @param fingerprint
*/
private void loadQrCode(final String fingerprint) {
AsyncTask<Void, Void, Bitmap> loadTask =
new AsyncTask<Void, Void, Bitmap>() {
protected Bitmap doInBackground(Void... unused) {
Uri uri = new Uri.Builder()
.scheme(Constants.FINGERPRINT_SCHEME)
.opaquePart(fingerprint)
.build();
// render with minimal size
return QrCodeUtils.getQRCodeBitmap(uri, 0);
}
protected void onPostExecute(Bitmap qrCode) {
// only change view, if fragment is attached to activity
if (ViewKeyAdvShareFragment.this.isAdded()) {
// 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(qrCode,
mQrCode.getHeight(), mQrCode.getHeight(),
false);
mQrCode.setImageBitmap(scaled);
// simple fade-in animation
AlphaAnimation anim = new AlphaAnimation(0.0f, 1.0f);
anim.setDuration(200);
mQrCode.startAnimation(anim);
}
}
};
loadTask.execute();
}
private void uploadToKeyserver() {
Intent uploadIntent = new Intent(getActivity(), UploadKeyActivity.class);
uploadIntent.setData(mDataUri);
startActivityForResult(uploadIntent, 0);
}
}