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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.Message;
import android.os.Messenger;
import android.view.View;
import org.openintents.openpgp.util.OpenPgpApi;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.operations.results.PgpSignEncryptResult;
import org.sufficientlysecure.keychain.operations.results.SignEncryptResult;
import org.sufficientlysecure.keychain.pgp.SignEncryptParcel;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.util.Passphrase;
import java.util.Date;
public abstract class EncryptActivity extends BaseActivity {
public static final int REQUEST_CODE_PASSPHRASE = 0x00008001;
public static final int REQUEST_CODE_NFC = 0x00008002;
// For NFC data
protected Passphrase mSigningKeyPassphrase = null;
protected Date mNfcTimestamp = null;
protected byte[] mNfcHash = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setFullScreenDialogClose(new View.OnClickListener() {
@Override
public void onClick(View v) {
setResult(Activity.RESULT_CANCELED);
finish();
}
}, false);
}
protected void startPassphraseDialog(long subkeyId) {
Intent intent = new Intent(this, PassphraseDialogActivity.class);
intent.putExtra(PassphraseDialogActivity.EXTRA_SUBKEY_ID, subkeyId);
startActivityForResult(intent, REQUEST_CODE_PASSPHRASE);
}
protected void startNfcSign(long keyId, Passphrase pin, byte[] hashToSign, int hashAlgo) {
// build PendingIntent for Yubikey NFC operations
Intent intent = new Intent(this, NfcActivity.class);
intent.setAction(NfcActivity.ACTION_SIGN_HASH);
// pass params through to activity that it can be returned again later to repeat pgp operation
intent.putExtra(NfcActivity.EXTRA_DATA, new Intent()); // not used, only relevant to OpenPgpService
intent.putExtra(NfcActivity.EXTRA_KEY_ID, keyId);
intent.putExtra(NfcActivity.EXTRA_PIN, pin);
intent.putExtra(NfcActivity.EXTRA_NFC_HASH_TO_SIGN, hashToSign);
intent.putExtra(NfcActivity.EXTRA_NFC_HASH_ALGO, hashAlgo);
startActivityForResult(intent, REQUEST_CODE_NFC);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CODE_PASSPHRASE: {
if (resultCode == RESULT_OK && data != null) {
mSigningKeyPassphrase = data.getParcelableExtra(PassphraseDialogActivity.MESSAGE_DATA_PASSPHRASE);
startEncrypt();
return;
}
break;
}
case REQUEST_CODE_NFC: {
if (resultCode == RESULT_OK && data != null) {
mNfcHash = data.getByteArrayExtra(OpenPgpApi.EXTRA_NFC_SIGNED_HASH);
startEncrypt();
return;
}
break;
}
default: {
super.onActivityResult(requestCode, resultCode, data);
break;
}
}
}
public void startEncrypt() {
if (!inputIsValid()) {
// Notify was created by inputIsValid.
return;
}
// Send all information needed to service to edit key in other thread
Intent intent = new Intent(this, KeychainIntentService.class);
intent.setAction(KeychainIntentService.ACTION_SIGN_ENCRYPT);
Bundle data = new Bundle();
data.putParcelable(KeychainIntentService.SIGN_ENCRYPT_PARCEL, createEncryptBundle());
intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
// Message is received after encrypting is done in KeychainIntentService
KeychainIntentServiceHandler serviceHandler = new KeychainIntentServiceHandler(this,
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 == MessageStatus.OKAY.ordinal()) {
SignEncryptResult result =
message.getData().getParcelable(SignEncryptResult.EXTRA_RESULT);
PgpSignEncryptResult pgpResult = result.getPending();
if (pgpResult != null && pgpResult.isPending()) {
if ((pgpResult.getResult() & PgpSignEncryptResult.RESULT_PENDING_PASSPHRASE) ==
PgpSignEncryptResult.RESULT_PENDING_PASSPHRASE) {
startPassphraseDialog(pgpResult.getKeyIdPassphraseNeeded());
} else if ((pgpResult.getResult() & PgpSignEncryptResult.RESULT_PENDING_NFC) ==
PgpSignEncryptResult.RESULT_PENDING_NFC) {
mNfcTimestamp = pgpResult.getNfcTimestamp();
startNfcSign(pgpResult.getNfcKeyId(), pgpResult.getNfcPassphrase(),
pgpResult.getNfcHash(), pgpResult.getNfcAlgo());
} else {
throw new RuntimeException("Unhandled pending result!");
}
return;
}
if (result.success()) {
onEncryptSuccess(result);
} else {
result.createNotify(EncryptActivity.this).show();
}
// no matter the result, reset parameters
mSigningKeyPassphrase = null;
mNfcHash = null;
mNfcTimestamp = null;
}
}
};
// Create a new Messenger for the communication back
Messenger messenger = new Messenger(serviceHandler);
intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
// show progress dialog
serviceHandler.showProgressDialog(this);
// start service with intent
startService(intent);
}
protected abstract boolean inputIsValid();
protected abstract void onEncryptSuccess(SignEncryptResult result);
protected abstract SignEncryptParcel createEncryptBundle();
}
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