/* * Copyright (C) 2013-2014 Dominik Schürmann * 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 . */ package org.sufficientlysecure.keychain.ui; import android.annotation.TargetApi; import android.content.Intent; import android.database.Cursor; 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.provider.ContactsContract; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; import com.astuetz.PagerSlidingTabStrip; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.operations.results.OperationResult; import org.sufficientlysecure.keychain.pgp.KeyRing; import org.sufficientlysecure.keychain.provider.KeychainContract; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler; import org.sufficientlysecure.keychain.ui.adapter.PagerTabStripAdapter; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import org.sufficientlysecure.keychain.ui.util.Notify; import org.sufficientlysecure.keychain.util.ContactHelper; import org.sufficientlysecure.keychain.util.ExportHelper; import org.sufficientlysecure.keychain.util.Log; import java.util.Date; import java.util.HashMap; public class ViewKeyActivity extends BaseActivity implements LoaderManager.LoaderCallbacks { ExportHelper mExportHelper; ProviderHelper mProviderHelper; protected Uri mDataUri; private LinearLayout mStatusLayout; private TextView mStatusText; private ImageView mStatusImage; private View mStatusDivider; // NFC private NfcAdapter mNfcAdapter; private NfcAdapter.CreateNdefMessageCallback mNdefCallback; private NfcAdapter.OnNdefPushCompleteCallback mNdefCompleteCallback; private byte[] mNfcKeyringBytes; private static final int NFC_SENT = 1; private static final int LOADER_ID_UNIFIED = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mExportHelper = new ExportHelper(this); mProviderHelper = new ProviderHelper(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); mStatusLayout = (LinearLayout) findViewById(R.id.view_key_status_layout); mStatusText = (TextView) findViewById(R.id.view_key_status_text); mStatusImage = (ImageView) findViewById(R.id.view_key_status_image); mStatusDivider = findViewById(R.id.view_key_status_divider); Intent intent = getIntent(); mDataUri = getIntent().getData(); if (mDataUri == null) { Log.e(Constants.TAG, "Data missing. Should be uri of key!"); finish(); return; } if (mDataUri.getHost().equals(ContactsContract.AUTHORITY)) { mDataUri = ContactHelper.dataUriFromContactUri(this, mDataUri); if (mDataUri == null) { Log.e(Constants.TAG, "Contact Data missing. Should be uri of key!"); Toast.makeText(this, R.string.error_contacts_key_id_missing, Toast.LENGTH_LONG).show(); finish(); return; } } Log.i(Constants.TAG, "mDataUri: " + mDataUri.toString()); // Prepare the loaders. Either re-connect with an existing ones, // or start new ones. getSupportLoaderManager().initLoader(LOADER_ID_UNIFIED, null, this); initNfc(mDataUri); startFragment(savedInstanceState, mDataUri); } @Override protected void initLayout() { setContentView(R.layout.view_key_activity); } private void startFragment(Bundle savedInstanceState, Uri dataUri) { // However, if we're being restored from a previous state, // then we don't need to do anything and should return or else // we could end up with overlapping fragments. if (savedInstanceState != null) { return; } // Create an instance of the fragment ViewKeyFragment frag = ViewKeyFragment.newInstance(dataUri); // Add the fragment to the 'fragment_container' FrameLayout // NOTE: We use commitAllowingStateLoss() to prevent weird crashes! getSupportFragmentManager().beginTransaction() .replace(R.id.view_key_fragment, frag) .commitAllowingStateLoss(); // do it immediately! getSupportFragmentManager().executePendingTransactions(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.key_view, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { try { switch (item.getItemId()) { case android.R.id.home: { Intent homeIntent = new Intent(this, MainActivity.class); homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(homeIntent); return true; } case R.id.menu_key_view_export_file: { exportToFile(mDataUri, mExportHelper, mProviderHelper); return true; } case R.id.menu_key_view_delete: { deleteKey(mDataUri, mExportHelper); return true; } case R.id.menu_key_view_advanced: { Intent advancedIntent = new Intent(this, ViewKeyAdvActivity.class); advancedIntent.setData(mDataUri); startActivity(advancedIntent); } } } catch (ProviderHelper.NotFoundException e) { Notify.showNotify(this, R.string.error_key_not_found, Notify.Style.ERROR); Log.e(Constants.TAG, "Key not found", e); } return super.onOptionsItemSelected(item); } private void exportToFile(Uri dataUri, ExportHelper exportHelper, ProviderHelper providerHelper) throws ProviderHelper.NotFoundException { Uri baseUri = KeychainContract.KeyRings.buildUnifiedKeyRingUri(dataUri); HashMap data = providerHelper.getGenericData( 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) != 0) ); } private void deleteKey(Uri dataUri, ExportHelper exportHelper) { // Message is received after key is deleted Handler returnHandler = new Handler() { @Override public void handleMessage(Message message) { if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) { setResult(RESULT_CANCELED); finish(); } } }; exportHelper.deleteKey(dataUri, returnHandler); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // if a result has been returned, display a notify if (data != null && data.hasExtra(OperationResult.EXTRA_RESULT)) { OperationResult result = data.getParcelableExtra(OperationResult.EXTRA_RESULT); result.createNotify(this).show(); } else { super.onActivityResult(requestCode, resultCode, data); } } /** * 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. */ return new NdefMessage(NdefRecord.createMime(Constants.NFC_MIME, mNfcKeyringBytes), NdefRecord.createApplicationRecord(Constants.PACKAGE_NAME)); } }; // 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 initTask = new AsyncTask() { protected Void doInBackground(Void... unused) { try { Uri blobUri = KeychainContract.KeyRingData.buildPublicKeyRingUri(dataUri); mNfcKeyringBytes = (byte[]) mProviderHelper.getGenericData( blobUri, KeychainContract.KeyRingData.KEY_RING_DATA, ProviderHelper.FIELD_TYPE_BLOB); } 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: Notify.showNotify( ViewKeyActivity.this, R.string.nfc_successful, Notify.Style.INFO); break; } } }; static final String[] UNIFIED_PROJECTION = new String[]{ KeychainContract.KeyRings._ID, KeychainContract.KeyRings.MASTER_KEY_ID, KeychainContract.KeyRings.USER_ID, KeychainContract.KeyRings.IS_REVOKED, KeychainContract.KeyRings.EXPIRY, }; static final int INDEX_UNIFIED_MASTER_KEY_ID = 1; static final int INDEX_UNIFIED_USER_ID = 2; static final int INDEX_UNIFIED_IS_REVOKED = 3; static final int INDEX_UNIFIED_EXPIRY = 4; @Override public Loader onCreateLoader(int id, Bundle args) { switch (id) { case LOADER_ID_UNIFIED: { Uri baseUri = KeychainContract.KeyRings.buildUnifiedKeyRingUri(mDataUri); return new CursorLoader(this, baseUri, UNIFIED_PROJECTION, null, null, null); } default: return null; } } @Override public void onLoadFinished(Loader 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()) { // get name, email, and comment from USER_ID String[] mainUserId = KeyRing.splitUserId(data.getString(INDEX_UNIFIED_USER_ID)); if (mainUserId[0] != null) { setTitle(mainUserId[0]); } else { setTitle(R.string.user_id_no_name); } // get key id from MASTER_KEY_ID long masterKeyId = data.getLong(INDEX_UNIFIED_MASTER_KEY_ID); getSupportActionBar().setSubtitle(KeyFormattingUtils.beautifyKeyIdWithPrefix(this, masterKeyId)); boolean isRevoked = data.getInt(INDEX_UNIFIED_IS_REVOKED) > 0; boolean isExpired = !data.isNull(INDEX_UNIFIED_EXPIRY) && new Date(data.getLong(INDEX_UNIFIED_EXPIRY) * 1000).before(new Date()); // Note: order is important if (isRevoked) { mStatusText.setText(R.string.view_key_revoked); KeyFormattingUtils.setStatusImage(this, mStatusImage, mStatusText, KeyFormattingUtils.STATE_REVOKED); mStatusDivider.setVisibility(View.VISIBLE); mStatusLayout.setVisibility(View.VISIBLE); } else if (isExpired) { mStatusText.setText(R.string.view_key_expired); KeyFormattingUtils.setStatusImage(this, mStatusImage, mStatusText, KeyFormattingUtils.STATE_EXPIRED); mStatusDivider.setVisibility(View.VISIBLE); mStatusLayout.setVisibility(View.VISIBLE); } else { mStatusDivider.setVisibility(View.GONE); mStatusLayout.setVisibility(View.GONE); } break; } } } } @Override public void onLoaderReset(Loader loader) { } }