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/*
* 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.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.helper.Preferences;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.service.PassphraseCacheService;
import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Notify;
public class EncryptMessageFragment extends Fragment {
public static final String ARG_TEXT = "text";
private TextView mMessage = null;
private View mEncryptShare;
private View mEncryptClipboard;
private EncryptActivityInterface mEncryptInterface;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mEncryptInterface = (EncryptActivityInterface) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString() + " must implement EncryptActivityInterface");
}
}
/**
* Inflate the layout for this fragment
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.encrypt_message_fragment, container, false);
mMessage = (TextView) view.findViewById(R.id.message);
mEncryptClipboard = view.findViewById(R.id.action_encrypt_clipboard);
mEncryptShare = view.findViewById(R.id.action_encrypt_share);
mEncryptClipboard.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
encryptClicked(true);
}
});
mEncryptShare.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
encryptClicked(false);
}
});
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String text = getArguments().getString(ARG_TEXT);
if (text != null) {
mMessage.setText(text);
}
}
/**
* Fixes bad message characters for gmail
*
* @param message
* @return
*/
private String fixBadCharactersForGmail(String message) {
// fix the message a bit, trailing spaces and newlines break stuff,
// because GMail sends as HTML and such things fuck up the
// signature,
// TODO: things like "<" and ">" also fuck up the signature
message = message.replaceAll(" +\n", "\n");
message = message.replaceAll("\n\n+", "\n\n");
message = message.replaceFirst("^\n+", "");
// make sure there'll be exactly one newline at the end
message = message.replaceFirst("\n*$", "\n");
return message;
}
private void encryptClicked(final boolean toClipboard) {
if (mEncryptInterface.isModeSymmetric()) {
// symmetric encryption
boolean gotPassphrase = (mEncryptInterface.getPassphrase() != null
&& mEncryptInterface.getPassphrase().length() != 0);
if (!gotPassphrase) {
Notify.showNotify(getActivity(), R.string.passphrase_must_not_be_empty, Notify.Style.ERROR);
return;
}
if (!mEncryptInterface.getPassphrase().equals(mEncryptInterface.getPassphraseAgain())) {
Notify.showNotify(getActivity(), R.string.passphrases_do_not_match, Notify.Style.ERROR);
return;
}
} else {
// asymmetric encryption
boolean gotEncryptionKeys = (mEncryptInterface.getEncryptionKeys() != null
&& mEncryptInterface.getEncryptionKeys().length > 0);
if (!gotEncryptionKeys && mEncryptInterface.getSignatureKey() == 0) {
Notify.showNotify(getActivity(), R.string.select_encryption_or_signature_key,
Notify.Style.ERROR);
return;
}
if (mEncryptInterface.getSignatureKey() != 0 &&
PassphraseCacheService.getCachedPassphrase(getActivity(),
mEncryptInterface.getSignatureKey()) == null) {
PassphraseDialogFragment.show(getActivity(), mEncryptInterface.getSignatureKey(),
new Handler() {
@Override
public void handleMessage(Message message) {
if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
encryptStart(toClipboard);
}
}
});
return;
}
}
encryptStart(toClipboard);
}
private void encryptStart(final boolean toClipboard) {
// Send all information needed to service to edit key in other thread
Intent intent = new Intent(getActivity(), KeychainIntentService.class);
intent.setAction(KeychainIntentService.ACTION_ENCRYPT_SIGN);
// fill values for this action
Bundle data = new Bundle();
data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_BYTES);
String message = mMessage.getText().toString();
if (mEncryptInterface.isModeSymmetric()) {
Log.d(Constants.TAG, "Symmetric encryption enabled!");
String passphrase = mEncryptInterface.getPassphrase();
if (passphrase.length() == 0) {
passphrase = null;
}
data.putString(KeychainIntentService.ENCRYPT_SYMMETRIC_PASSPHRASE, passphrase);
} else {
data.putLong(KeychainIntentService.ENCRYPT_SIGNATURE_KEY_ID,
mEncryptInterface.getSignatureKey());
data.putLongArray(KeychainIntentService.ENCRYPT_ENCRYPTION_KEYS_IDS,
mEncryptInterface.getEncryptionKeys());
boolean signOnly = (mEncryptInterface.getEncryptionKeys() == null
|| mEncryptInterface.getEncryptionKeys().length == 0);
if (signOnly) {
message = fixBadCharactersForGmail(message);
}
}
data.putByteArray(KeychainIntentService.ENCRYPT_MESSAGE_BYTES, message.getBytes());
data.putBoolean(KeychainIntentService.ENCRYPT_USE_ASCII_ARMOR, true);
int compressionId = Preferences.getPreferences(getActivity()).getDefaultMessageCompression();
data.putInt(KeychainIntentService.ENCRYPT_COMPRESSION_ID, compressionId);
intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
// Message is received after encrypting is done in KeychainIntentService
KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(getActivity(),
getString(R.string.progress_encrypting), ProgressDialog.STYLE_HORIZONTAL) {
public void handleMessage(Message message) {
// handle messages by standard KeychainIntentServiceHandler first
super.handleMessage(message);
if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) {
// get returned data bundle
Bundle data = message.getData();
String output = new String(data.getByteArray(KeychainIntentService.RESULT_BYTES));
Log.d(Constants.TAG, "output: " + output);
if (toClipboard) {
ClipboardReflection.copyToClipboard(getActivity(), output);
Notify.showNotify(getActivity(),
R.string.encrypt_sign_clipboard_successful, Notify.Style.INFO);
} else {
Intent sendIntent = new Intent(Intent.ACTION_SEND);
// Type is set to text/plain so that encrypted messages can
// be sent with Whatsapp, Hangouts, SMS etc...
sendIntent.setType("text/plain");
sendIntent.putExtra(Intent.EXTRA_TEXT, output);
startActivity(Intent.createChooser(sendIntent,
getString(R.string.title_share_with)));
}
}
}
};
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(saveHandler);
intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
// show progress dialog
saveHandler.showProgressDialog(getActivity());
// start service with intent
getActivity().startService(intent);
}
}
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