296 lines
12 KiB
Java
296 lines
12 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.ui;
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import android.annotation.TargetApi;
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import android.content.Intent;
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import android.net.Uri;
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import android.nfc.NdefMessage;
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import android.nfc.NfcAdapter;
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import android.os.Build;
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import android.os.Bundle;
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import android.os.Parcelable;
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import android.support.v4.app.FragmentActivity;
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import android.widget.Toast;
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import com.google.zxing.integration.android.IntentIntegrator;
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import com.google.zxing.integration.android.IntentResult;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.R;
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import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing;
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import org.sufficientlysecure.keychain.operations.results.ImportKeyResult;
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import org.sufficientlysecure.keychain.operations.results.OperationResult;
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import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
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import org.sufficientlysecure.keychain.operations.results.SingletonResult;
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import org.sufficientlysecure.keychain.service.ImportKeyringParcel;
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import org.sufficientlysecure.keychain.ui.base.CryptoOperationHelper;
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import org.sufficientlysecure.keychain.ui.transfer.view.TransferFragment;
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import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
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import org.sufficientlysecure.keychain.util.IntentIntegratorSupportV4;
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import org.sufficientlysecure.keychain.keyimport.HkpKeyserverAddress;
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import org.sufficientlysecure.keychain.util.Preferences;
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import timber.log.Timber;
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import java.util.ArrayList;
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import java.util.Locale;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Proxy activity (just a transparent content view) to scan QR Codes using the Barcode Scanner app
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*/
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public class ImportKeysProxyActivity extends FragmentActivity
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implements CryptoOperationHelper.Callback<ImportKeyringParcel, ImportKeyResult> {
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public static final String ACTION_QR_CODE_API = Constants.IMPORT_KEY_FROM_QR_CODE;
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// implies activity returns scanned fingerprint as extra and does not import
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public static final String ACTION_SCAN_WITH_RESULT = Constants.INTENT_PREFIX + "SCAN_QR_CODE_WITH_RESULT";
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public static final String ACTION_SCAN_IMPORT = Constants.INTENT_PREFIX + "SCAN_QR_CODE_IMPORT";
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public static final String EXTRA_FINGERPRINT = "fingerprint";
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// for CryptoOperationHelper
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private HkpKeyserverAddress mKeyserver;
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private ArrayList<ParcelableKeyRing> mKeyList;
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private CryptoOperationHelper<ImportKeyringParcel, ImportKeyResult> mImportOpHelper;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// this activity itself has no content view (see manifest)
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handleActions(getIntent());
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}
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protected void handleActions(Intent intent) {
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String action = intent.getAction();
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Uri dataUri = intent.getData();
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String scheme = intent.getScheme();
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if (scheme != null && scheme.toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) {
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// Scanning a fingerprint directly with Barcode Scanner, thus we already have scanned
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processScannedContent(dataUri);
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} else if (ACTION_SCAN_WITH_RESULT.equals(action)
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|| ACTION_SCAN_IMPORT.equals(action) || ACTION_QR_CODE_API.equals(action)) {
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new IntentIntegrator(this).setCaptureActivity(QrCodeCaptureActivity.class).initiateScan();
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} else if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
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// Check to see if the Activity started due to an Android Beam
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
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handleActionNdefDiscovered(getIntent());
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} else {
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Timber.e("Android Beam not supported by Android < 4.1");
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finish();
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}
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} else {
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Timber.e("No valid scheme or action given!");
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finish();
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}
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}
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (mImportOpHelper != null) {
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if (!mImportOpHelper.handleActivityResult(requestCode, resultCode, data)) {
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// if a result has been returned, and it does not belong to mImportOpHelper,
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// return it down to other activity
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if (data != null && data.hasExtra(OperationResult.EXTRA_RESULT)) {
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returnResult(data);
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} else {
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super.onActivityResult(requestCode, resultCode, data);
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finish();
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}
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}
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}
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if (requestCode == IntentIntegratorSupportV4.REQUEST_CODE) {
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IntentResult scanResult = IntentIntegratorSupportV4.parseActivityResult(requestCode,
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resultCode, data);
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if (scanResult == null || scanResult.getFormatName() == null) {
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Timber.e("scanResult or formatName null! Should not happen!");
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finish();
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return;
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}
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String scannedContent = scanResult.getContents();
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processScannedContent(scannedContent);
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}
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}
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private static final Pattern VCARD_KEY_PATTERN = Pattern.compile("\nKEY:(.*)\n");
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private void processScannedContent(String content) {
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// if a VCard was scanned try to extract the KEY field
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if (content.startsWith("BEGIN:VCARD")) {
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Matcher matcher = VCARD_KEY_PATTERN.matcher(content);
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if (matcher.find()) {
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content = matcher.group(1);
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}
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}
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Uri uri = Uri.parse(content);
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processScannedContent(uri);
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}
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private void processScannedContent(Uri uri) {
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String action = getIntent().getAction();
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Timber.d("scanned: " + uri);
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// example: pgp+transfer:
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if (uri != null && uri.getScheme() != null && uri.getScheme().equalsIgnoreCase(Constants.SKT_SCHEME)) {
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Intent intent = new Intent(this, MainActivity.class);
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intent.putExtra(MainActivity.EXTRA_INIT_FRAG, MainActivity.ID_TRANSFER);
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intent.putExtra(TransferFragment.EXTRA_OPENPGP_SKT_INFO, uri);
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intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
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startActivity(intent);
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finish();
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return;
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}
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// example: openpgp4fpr:73EE2314F65FA92EC2390D3A718C070100012282
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if (uri == null || uri.getScheme() == null ||
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!uri.getScheme().toLowerCase(Locale.ENGLISH).equals(Constants.FINGERPRINT_SCHEME)) {
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SingletonResult result = new SingletonResult(
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SingletonResult.RESULT_ERROR, LogType.MSG_WRONG_QR_CODE);
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Intent intent = new Intent();
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intent.putExtra(SingletonResult.EXTRA_RESULT, result);
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returnResult(intent);
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return;
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}
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final String fingerprintHex = uri.getEncodedSchemeSpecificPart().toLowerCase(Locale.ENGLISH);
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if (!fingerprintHex.matches("[a-fA-F0-9]{40}")) {
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SingletonResult result = new SingletonResult(
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SingletonResult.RESULT_ERROR, LogType.MSG_WRONG_QR_CODE_FP);
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Intent intent = new Intent();
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intent.putExtra(SingletonResult.EXTRA_RESULT, result);
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returnResult(intent);
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return;
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}
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byte[] fingerprint = KeyFormattingUtils.convertFingerprintHexFingerprint(fingerprintHex);
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if (ACTION_SCAN_WITH_RESULT.equals(action)) {
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Intent result = new Intent();
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result.putExtra(EXTRA_FINGERPRINT, fingerprint);
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setResult(RESULT_OK, result);
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finish();
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} else {
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importKeysFromFingerprint(fingerprint);
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}
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}
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public void returnResult(Intent data) {
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String action = getIntent().getAction();
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if (ACTION_QR_CODE_API.equals(action)) {
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// display last log message but as Toast for calls from outside OpenKeychain
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OperationResult result = data.getParcelableExtra(OperationResult.EXTRA_RESULT);
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String str = getString(result.getLog().getLast().mType.getMsgId());
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Toast.makeText(this, str, Toast.LENGTH_LONG).show();
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finish();
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} else {
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setResult(RESULT_OK, data);
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finish();
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}
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}
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public void importKeys(byte[] keyringData) {
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ParcelableKeyRing keyEntry = ParcelableKeyRing.createFromEncodedBytes(keyringData);
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ArrayList<ParcelableKeyRing> selectedEntries = new ArrayList<>();
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selectedEntries.add(keyEntry);
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startImportService(selectedEntries);
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}
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public void importKeysFromFingerprint(byte[] fingerprint) {
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ParcelableKeyRing keyEntry = ParcelableKeyRing.createFromReference(fingerprint, null, null);
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ArrayList<ParcelableKeyRing> selectedEntries = new ArrayList<>();
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selectedEntries.add(keyEntry);
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startImportService(selectedEntries);
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}
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private void startImportService(ArrayList<ParcelableKeyRing> keyRings) {
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// search config
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mKeyserver = Preferences.getPreferences(this).getPreferredKeyserver();
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mKeyList = keyRings;
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mImportOpHelper = new CryptoOperationHelper<>(1, this, this, R.string.progress_importing);
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mImportOpHelper.cryptoOperation();
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}
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// CryptoOperationHelper.Callback methods
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@Override
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public ImportKeyringParcel createOperationInput() {
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return ImportKeyringParcel.createImportKeyringParcel(mKeyList, mKeyserver);
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}
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@Override
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public void onCryptoOperationSuccess(ImportKeyResult result) {
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Intent certifyIntent = new Intent(this, CertifyKeyActivity.class);
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certifyIntent.putExtra(CertifyKeyActivity.EXTRA_RESULT, result);
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certifyIntent.putExtra(CertifyKeyActivity.EXTRA_KEY_IDS,
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result.getImportedMasterKeyIds());
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startActivityForResult(certifyIntent, 0);
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}
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@Override
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public void onCryptoOperationCancelled() {
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}
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@Override
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public void onCryptoOperationError(ImportKeyResult result) {
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Bundle returnData = new Bundle();
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returnData.putParcelable(OperationResult.EXTRA_RESULT, result);
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Intent data = new Intent();
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data.putExtras(returnData);
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returnResult(data);
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}
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@Override
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public boolean onCryptoSetProgress(String msg, int progress, int max) {
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return false;
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}
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/**
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* NFC: Parses the NDEF Message from the intent and prints to the TextView
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*/
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@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
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void handleActionNdefDiscovered(Intent intent) {
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Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
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// only one message sent during the beam
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NdefMessage msg = (NdefMessage) rawMsgs[0];
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// record 0 contains the MIME type, record 1 is the AAR, if present
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final byte[] receivedKeyringBytes = msg.getRecords()[0].getPayload();
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importKeys(receivedKeyringBytes);
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}
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}
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