Java tutorial
/* * Copyright (C) 2014 Dominik Schrmann <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 java.io.IOException; import java.nio.ByteBuffer; import java.util.ArrayList; 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.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.TextView; import org.spongycastle.util.encoders.Hex; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing; import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult; import org.sufficientlysecure.keychain.operations.results.ImportKeyResult; import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; import org.sufficientlysecure.keychain.service.KeychainService; import org.sufficientlysecure.keychain.service.ServiceProgressHandler; import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction; import org.sufficientlysecure.keychain.ui.CreateKeyActivity.NfcListenerFragment; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import org.sufficientlysecure.keychain.util.Preferences; public class CreateKeyYubiKeyImportFragment extends Fragment implements NfcListenerFragment { private static final String ARG_FINGERPRINT = "fingerprint"; public static final String ARG_AID = "aid"; public static final String ARG_USER_ID = "user_ids"; CreateKeyActivity mCreateKeyActivity; private byte[] mNfcFingerprints; private byte[] mNfcAid; private String mNfcUserId; private String mNfcFingerprint; private ImportKeysListFragment mListFragment; private TextView vSerNo; private TextView vUserId; public static Fragment createInstance(byte[] scannedFingerprints, byte[] nfcAid, String userId) { CreateKeyYubiKeyImportFragment frag = new CreateKeyYubiKeyImportFragment(); Bundle args = new Bundle(); args.putByteArray(ARG_FINGERPRINT, scannedFingerprints); args.putByteArray(ARG_AID, nfcAid); args.putString(ARG_USER_ID, userId); frag.setArguments(args); return frag; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle args = savedInstanceState != null ? savedInstanceState : getArguments(); mNfcFingerprints = args.getByteArray(ARG_FINGERPRINT); mNfcAid = args.getByteArray(ARG_AID); mNfcUserId = args.getString(ARG_USER_ID); byte[] fp = new byte[20]; ByteBuffer.wrap(fp).put(mNfcFingerprints, 0, 20); mNfcFingerprint = KeyFormattingUtils.convertFingerprintToHex(fp); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.create_yubikey_import_fragment, container, false); vSerNo = (TextView) view.findViewById(R.id.yubikey_serno); vUserId = (TextView) view.findViewById(R.id.yubikey_userid); { View mBackButton = view.findViewById(R.id.create_key_back_button); mBackButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (getFragmentManager().getBackStackEntryCount() == 0) { getActivity().setResult(Activity.RESULT_CANCELED); getActivity().finish(); } else { mCreateKeyActivity.loadFragment(null, FragAction.TO_LEFT); } } }); View mNextButton = view.findViewById(R.id.create_key_next_button); mNextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { importKey(); } }); } mListFragment = ImportKeysListFragment.newInstance(null, null, "0x" + mNfcFingerprint, true, null); view.findViewById(R.id.button_search).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { refreshSearch(); } }); setData(); getFragmentManager().beginTransaction() .replace(R.id.yubikey_import_fragment, mListFragment, "yubikey_import").commit(); return view; } @Override public void onSaveInstanceState(Bundle args) { super.onSaveInstanceState(args); args.putByteArray(ARG_FINGERPRINT, mNfcFingerprints); args.putByteArray(ARG_AID, mNfcAid); args.putString(ARG_USER_ID, mNfcUserId); } @Override public void onAttach(Activity activity) { super.onAttach(activity); mCreateKeyActivity = (CreateKeyActivity) getActivity(); } public void setData() { String serno = Hex.toHexString(mNfcAid, 10, 4); vSerNo.setText(getString(R.string.yubikey_serno, serno)); if (!mNfcUserId.isEmpty()) { vUserId.setText(getString(R.string.yubikey_key_holder, mNfcUserId)); } else { vUserId.setText(getString(R.string.yubikey_key_holder_not_set)); } } public void refreshSearch() { mListFragment.loadNew(new ImportKeysListFragment.CloudLoaderState("0x" + mNfcFingerprint, Preferences.getPreferences(getActivity()).getCloudSearchPrefs())); } public void importKey() { // Message is received after decrypting is done in KeychainService ServiceProgressHandler saveHandler = new ServiceProgressHandler(getActivity(), getString(R.string.progress_importing), ProgressDialog.STYLE_HORIZONTAL) { @Override public void handleMessage(Message message) { // handle messages by standard KeychainIntentServiceHandler first super.handleMessage(message); if (message.arg1 == MessageStatus.OKAY.ordinal()) { // get returned data bundle Bundle returnData = message.getData(); ImportKeyResult result = returnData.getParcelable(DecryptVerifyResult.EXTRA_RESULT); long[] masterKeyIds = result.getImportedMasterKeyIds(); // TODO handle masterKeyIds.length != 1...? sorta outlandish scenario if (!result.success() || masterKeyIds.length == 0) { result.createNotify(getActivity()).show(); return; } Intent intent = new Intent(getActivity(), ViewKeyActivity.class); // use the imported masterKeyId, not the one from the yubikey, because // that one might* just have been a subkey of the imported key intent.setData(KeyRings.buildGenericKeyRingUri(masterKeyIds[0])); intent.putExtra(ViewKeyActivity.EXTRA_DISPLAY_RESULT, result); intent.putExtra(ViewKeyActivity.EXTRA_NFC_AID, mNfcAid); intent.putExtra(ViewKeyActivity.EXTRA_NFC_USER_ID, mNfcUserId); intent.putExtra(ViewKeyActivity.EXTRA_NFC_FINGERPRINTS, mNfcFingerprints); startActivity(intent); getActivity().finish(); } } }; // Send all information needed to service to decrypt in other thread Intent intent = new Intent(getActivity(), KeychainService.class); // fill values for this action Bundle data = new Bundle(); intent.setAction(KeychainService.ACTION_IMPORT_KEYRING); ArrayList<ParcelableKeyRing> keyList = new ArrayList<>(); keyList.add(new ParcelableKeyRing(mNfcFingerprint, null, null)); data.putParcelableArrayList(KeychainService.IMPORT_KEY_LIST, keyList); { Preferences prefs = Preferences.getPreferences(getActivity()); Preferences.CloudSearchPrefs cloudPrefs = new Preferences.CloudSearchPrefs(true, true, prefs.getPreferredKeyserver()); data.putString(KeychainService.IMPORT_KEY_SERVER, cloudPrefs.keyserver); } intent.putExtra(KeychainService.EXTRA_DATA, data); // Create a new Messenger for the communication back Messenger messenger = new Messenger(saveHandler); intent.putExtra(KeychainService.EXTRA_MESSENGER, messenger); saveHandler.showProgressDialog(getActivity()); // start service with intent getActivity().startService(intent); } @Override public void onNfcPerform() throws IOException { mNfcFingerprints = mCreateKeyActivity.nfcGetFingerprints(); mNfcAid = mCreateKeyActivity.nfcGetAid(); mNfcUserId = mCreateKeyActivity.nfcGetUserId(); byte[] fp = new byte[20]; ByteBuffer.wrap(fp).put(mNfcFingerprints, 0, 20); mNfcFingerprint = KeyFormattingUtils.convertFingerprintToHex(fp); setData(); refreshSearch(); } }