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/*
* Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2013 Bahtiar 'kalkin' Gadimov
*
* 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.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcEvent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import com.devspark.appmsg.AppMsg;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.Id;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.helper.ExportHelper;
import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.ui.adapter.TabsAdapter;
import org.sufficientlysecure.keychain.ui.dialog.ShareNfcDialogFragment;
import org.sufficientlysecure.keychain.ui.dialog.ShareQrCodeDialogFragment;
import org.sufficientlysecure.keychain.util.Log;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
public class ViewKeyActivity extends ActionBarActivity {
ExportHelper mExportHelper;
protected Uri mDataUri;
public static final String EXTRA_SELECTED_TAB = "selectedTab";
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
private static final int RESULT_CODE_LOOKUP_KEY = 0x00007006;
// NFC
private NfcAdapter mNfcAdapter;
private NfcAdapter.CreateNdefMessageCallback mNdefCallback;
private NfcAdapter.OnNdefPushCompleteCallback mNdefCompleteCallback;
private byte[] mNfcKeyringBytes;
private static final int NFC_SENT = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
super.onCreate(savedInstanceState);
mExportHelper = new ExportHelper(this);
// let the actionbar look like Android's contact app
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setIcon(android.R.color.transparent);
actionBar.setHomeButtonEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
setContentView(R.layout.view_key_activity);
mViewPager = (ViewPager) findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, mViewPager);
int selectedTab = 0;
Intent intent = getIntent();
if (intent.getExtras() != null && intent.getExtras().containsKey(EXTRA_SELECTED_TAB)) {
selectedTab = intent.getExtras().getInt(EXTRA_SELECTED_TAB);
}
mDataUri = getIntent().getData();
initNfc(mDataUri);
Bundle mainBundle = new Bundle();
mainBundle.putParcelable(ViewKeyMainFragment.ARG_DATA_URI, mDataUri);
mTabsAdapter.addTab(actionBar.newTab().setText(getString(R.string.key_view_tab_main)),
ViewKeyMainFragment.class, mainBundle, (selectedTab == 0));
Bundle certBundle = new Bundle();
certBundle.putParcelable(ViewKeyCertsFragment.ARG_DATA_URI, mDataUri);
mTabsAdapter.addTab(actionBar.newTab().setText(getString(R.string.key_view_tab_certs)),
ViewKeyCertsFragment.class, certBundle, (selectedTab == 1));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.key_view, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
Intent homeIntent = new Intent(this, KeyListActivity.class);
homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);
return true;
case R.id.menu_key_view_update:
updateFromKeyserver(mDataUri);
return true;
case R.id.menu_key_view_export_keyserver:
uploadToKeyserver(mDataUri);
return true;
case R.id.menu_key_view_export_file:
exportToFile(mDataUri, mExportHelper);
return true;
case R.id.menu_key_view_share_default_fingerprint:
shareKey(mDataUri, true);
return true;
case R.id.menu_key_view_share_default:
shareKey(mDataUri, false);
return true;
case R.id.menu_key_view_share_qr_code_fingerprint:
shareKeyQrCode(mDataUri, true);
return true;
case R.id.menu_key_view_share_qr_code:
shareKeyQrCode(mDataUri, false);
return true;
case R.id.menu_key_view_share_nfc:
shareNfc();
return true;
case R.id.menu_key_view_share_clipboard:
copyToClipboard(mDataUri);
return true;
case R.id.menu_key_view_delete: {
deleteKey(mDataUri, mExportHelper);
return true;
}
}
return super.onOptionsItemSelected(item);
}
private void exportToFile(Uri dataUri, ExportHelper exportHelper) {
Uri baseUri = KeychainContract.KeyRings.buildUnifiedKeyRingUri(dataUri);
HashMap<String, Object> data = ProviderHelper.getGenericData(this,
baseUri,
new String[]{KeychainContract.Keys.MASTER_KEY_ID, KeychainContract.KeyRings.HAS_SECRET},
new int[]{ProviderHelper.FIELD_TYPE_INTEGER, ProviderHelper.FIELD_TYPE_INTEGER});
exportHelper.showExportKeysDialog(
new long[]{(Long) data.get(KeychainContract.KeyRings.MASTER_KEY_ID)},
Constants.Path.APP_DIR_FILE,
((Long) data.get(KeychainContract.KeyRings.HAS_SECRET) == 1)
);
}
private void uploadToKeyserver(Uri dataUri) {
Intent uploadIntent = new Intent(this, UploadKeyActivity.class);
uploadIntent.setData(dataUri);
startActivityForResult(uploadIntent, Id.request.export_to_server);
}
private void updateFromKeyserver(Uri dataUri) {
byte[] blob = (byte[]) ProviderHelper.getGenericData(
this, KeychainContract.KeyRings.buildUnifiedKeyRingUri(dataUri),
KeychainContract.Keys.FINGERPRINT, ProviderHelper.FIELD_TYPE_BLOB);
String fingerprint = PgpKeyHelper.convertFingerprintToHex(blob);
Intent queryIntent = new Intent(this, ImportKeysActivity.class);
queryIntent.setAction(ImportKeysActivity.ACTION_IMPORT_KEY_FROM_KEYSERVER_AND_RETURN);
queryIntent.putExtra(ImportKeysActivity.EXTRA_FINGERPRINT, fingerprint);
startActivityForResult(queryIntent, RESULT_CODE_LOOKUP_KEY);
}
private void shareKey(Uri dataUri, boolean fingerprintOnly) {
String content = null;
if (fingerprintOnly) {
byte[] data = (byte[]) ProviderHelper.getGenericData(
this, KeychainContract.KeyRings.buildUnifiedKeyRingUri(dataUri),
KeychainContract.Keys.FINGERPRINT, ProviderHelper.FIELD_TYPE_BLOB);
if (data != null) {
String fingerprint = PgpKeyHelper.convertFingerprintToHex(data);
content = Constants.FINGERPRINT_SCHEME + ":" + fingerprint;
} else {
AppMsg.makeText(this, "Bad key selected!",
AppMsg.STYLE_ALERT).show();
return;
}
} else {
// get public keyring as ascii armored string
try {
long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
this, new long[]{masterKeyId});
content = keyringArmored.get(0);
// Android will fail with android.os.TransactionTooLargeException if key is too big
// see http://www.lonestarprod.com/?p=34
if (content.length() >= 86389) {
AppMsg.makeText(this, R.string.key_too_big_for_sharing,
AppMsg.STYLE_ALERT).show();
return;
}
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
}
if (content != null) {
// let user choose application
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, content);
sendIntent.setType("text/plain");
startActivity(Intent.createChooser(sendIntent,
getResources().getText(R.string.action_share_key_with)));
} else {
Log.e(Constants.TAG, "content is null!");
}
}
private void shareKeyQrCode(Uri dataUri, boolean fingerprintOnly) {
ShareQrCodeDialogFragment dialog = ShareQrCodeDialogFragment.newInstance(dataUri,
fingerprintOnly);
dialog.show(getSupportFragmentManager(), "shareQrCodeDialog");
}
private void copyToClipboard(Uri dataUri) {
// get public keyring as ascii armored string
try {
long masterKeyId = ProviderHelper.getMasterKeyId(this, dataUri);
ArrayList<String> keyringArmored = ProviderHelper.getKeyRingsAsArmoredString(
this, new long[]{masterKeyId});
ClipboardReflection.copyToClipboard(this, keyringArmored.get(0));
AppMsg.makeText(this, R.string.key_copied_to_clipboard, AppMsg.STYLE_INFO)
.show();
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
}
private void shareNfc() {
ShareNfcDialogFragment dialog = ShareNfcDialogFragment.newInstance();
dialog.show(getSupportFragmentManager(), "shareNfcDialog");
}
private void deleteKey(Uri dataUri, ExportHelper exportHelper) {
// Message is received after key is deleted
Handler returnHandler = new Handler() {
@Override
public void handleMessage(Message message) {
setResult(RESULT_CANCELED);
finish();
}
};
exportHelper.deleteKey(dataUri, returnHandler);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case RESULT_CODE_LOOKUP_KEY: {
if (resultCode == Activity.RESULT_OK) {
// TODO: reload key??? move this into fragment?
}
break;
}
default: {
super.onActivityResult(requestCode, resultCode, data);
break;
}
}
}
/**
* NFC: Initialize NFC sharing if OS and device supports it
*/
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
private void initNfc(final Uri dataUri) {
// check if NFC Beam is supported (>= Android 4.1)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
// Implementation for the CreateNdefMessageCallback interface
mNdefCallback = new NfcAdapter.CreateNdefMessageCallback() {
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
/*
* When a device receives a push with an AAR in it, the application specified in the AAR is
* guaranteed to run. The AAR overrides the tag dispatch system. You can add it back in to
* guarantee that this activity starts when receiving a beamed message. For now, this code
* uses the tag dispatch system.
*/
NdefMessage msg = new NdefMessage(NdefRecord.createMime(Constants.NFC_MIME,
mNfcKeyringBytes), NdefRecord.createApplicationRecord(Constants.PACKAGE_NAME));
return msg;
}
};
// Implementation for the OnNdefPushCompleteCallback interface
mNdefCompleteCallback = new NfcAdapter.OnNdefPushCompleteCallback() {
@Override
public void onNdefPushComplete(NfcEvent event) {
// A handler is needed to send messages to the activity when this
// callback occurs, because it happens from a binder thread
mNfcHandler.obtainMessage(NFC_SENT).sendToTarget();
}
};
// Check for available NFC Adapter
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter != null) {
/*
* Retrieve mNfcKeyringBytes here asynchronously (to not block the UI)
* and init nfc adapter afterwards.
* mNfcKeyringBytes can not be retrieved in createNdefMessage, because this process
* has no permissions to query the Uri.
*/
AsyncTask<Void, Void, Void> initTask =
new AsyncTask<Void, Void, Void>() {
protected Void doInBackground(Void... unused) {
try {
Uri blobUri =
KeychainContract.KeyRingData.buildPublicKeyRingUri(dataUri);
mNfcKeyringBytes = ProviderHelper.getPGPKeyRing(
ViewKeyActivity.this, blobUri).getEncoded();
} catch (IOException e) {
Log.e(Constants.TAG, "Error parsing keyring", e);
} catch (ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG, "key not found!", e);
}
// no AsyncTask return (Void)
return null;
}
protected void onPostExecute(Void unused) {
// Register callback to set NDEF message
mNfcAdapter.setNdefPushMessageCallback(mNdefCallback
, ViewKeyActivity.this);
// Register callback to listen for message-sent success
mNfcAdapter.setOnNdefPushCompleteCallback(mNdefCompleteCallback,
ViewKeyActivity.this);
}
};
initTask.execute();
}
}
}
/**
* NFC: This handler receives a message from onNdefPushComplete
*/
private final Handler mNfcHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case NFC_SENT:
AppMsg.makeText(ViewKeyActivity.this, R.string.nfc_successfull,
AppMsg.STYLE_INFO).show();
break;
}
}
};
}
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