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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.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.EditText;
import com.devspark.appmsg.AppMsg;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.pgp.PgpDecryptVerifyResult;
import org.sufficientlysecure.keychain.pgp.PgpHelper;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.util.Log;
import java.util.regex.Matcher;
public class DecryptMessageFragment extends DecryptFragment {
public static final String ARG_CIPHERTEXT = "ciphertext";
// view
private EditText mMessage;
private View mDecryptButton;
private View mDecryptFromCLipboardButton;
// model
private String mCiphertext;
/**
* Inflate the layout for this fragment
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.decrypt_message_fragment, container, false);
mMessage = (EditText) view.findViewById(R.id.message);
mDecryptButton = view.findViewById(R.id.action_decrypt);
mDecryptFromCLipboardButton = view.findViewById(R.id.action_decrypt_from_clipboard);
mDecryptButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
decryptClicked();
}
});
mDecryptFromCLipboardButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
decryptFromClipboardClicked();
}
});
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String ciphertext = getArguments().getString(ARG_CIPHERTEXT);
if (ciphertext != null) {
mCiphertext = ciphertext;
decryptStart(null);
}
}
private void decryptClicked() {
mCiphertext = mMessage.getText().toString();
decryptStart(null);
}
private void decryptFromClipboardClicked() {
CharSequence clipboardText = ClipboardReflection.getClipboardText(getActivity());
// only decrypt if clipboard content is available and a pgp message or cleartext signature
if (clipboardText != null) {
Matcher matcher = PgpHelper.PGP_MESSAGE.matcher(clipboardText);
if (!matcher.matches()) {
matcher = PgpHelper.PGP_CLEARTEXT_SIGNATURE.matcher(clipboardText);
}
if (matcher.matches()) {
mCiphertext = matcher.group(1);
decryptStart(null);
} else {
AppMsg.makeText(getActivity(), R.string.error_invalid_data, AppMsg.STYLE_ALERT)
.show();
}
} else {
AppMsg.makeText(getActivity(), R.string.error_invalid_data, AppMsg.STYLE_ALERT)
.show();
}
}
@Override
protected void decryptStart(String passphrase) {
Log.d(Constants.TAG, "decryptStart");
// Send all information needed to service to decrypt in other thread
Intent intent = new Intent(getActivity(), KeychainIntentService.class);
// fill values for this action
Bundle data = new Bundle();
intent.setAction(KeychainIntentService.ACTION_DECRYPT_VERIFY);
// data
data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_BYTES);
data.putByteArray(KeychainIntentService.DECRYPT_CIPHERTEXT_BYTES, mCiphertext.getBytes());
data.putString(KeychainIntentService.DECRYPT_PASSPHRASE, passphrase);
intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
// Message is received after encrypting is done in KeychainIntentService
KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(getActivity(),
getString(R.string.progress_decrypting), 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 returnData = message.getData();
PgpDecryptVerifyResult decryptVerifyResult =
returnData.getParcelable(KeychainIntentService.RESULT_DECRYPT_VERIFY_RESULT);
if (PgpDecryptVerifyResult.KEY_PASSHRASE_NEEDED == decryptVerifyResult.getStatus()) {
showPassphraseDialog(decryptVerifyResult.getKeyIdPassphraseNeeded());
} else if (PgpDecryptVerifyResult.SYMMETRIC_PASSHRASE_NEEDED ==
decryptVerifyResult.getStatus()) {
showPassphraseDialog(Constants.key.symmetric);
} else {
byte[] decryptedMessage = returnData
.getByteArray(KeychainIntentService.RESULT_DECRYPTED_BYTES);
mMessage.setText(new String(decryptedMessage));
mMessage.setHorizontallyScrolling(false);
// display signature result in activity
onResult(decryptVerifyResult);
}
}
}
};
// 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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