Java tutorial
/* * Copyright (C) 2015 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (C) 2015 Vincent Breitmoser <v.breitmoser@mugenguild.com> * * 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.nio.ByteBuffer; import java.util.Arrays; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; import org.spongycastle.util.encoders.Hex; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.operations.results.PromoteKeyResult; import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType; import org.sufficientlysecure.keychain.provider.KeychainContract.Keys; import org.sufficientlysecure.keychain.service.PromoteKeyringParcel; import org.sufficientlysecure.keychain.ui.base.QueueingCryptoOperationFragment; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; public class ViewKeyYubiKeyFragment extends QueueingCryptoOperationFragment<PromoteKeyringParcel, PromoteKeyResult> implements LoaderCallbacks<Cursor> { public static final String ARG_MASTER_KEY_ID = "master_key_id"; public static final String ARG_FINGERPRINT = "fingerprint"; public static final String ARG_USER_ID = "user_id"; public static final String ARG_CARD_AID = "aid"; private byte[][] mFingerprints; private String mUserId; private byte[] mCardAid; private long mMasterKeyId; private long[] mSubKeyIds; private Button vButton; private TextView vStatus; public static ViewKeyYubiKeyFragment newInstance(long masterKeyId, byte[] fingerprints, String userId, byte[] aid) { ViewKeyYubiKeyFragment frag = new ViewKeyYubiKeyFragment(); Bundle args = new Bundle(); args.putLong(ARG_MASTER_KEY_ID, masterKeyId); args.putByteArray(ARG_FINGERPRINT, fingerprints); args.putString(ARG_USER_ID, userId); args.putByteArray(ARG_CARD_AID, aid); frag.setArguments(args); return frag; } public ViewKeyYubiKeyFragment() { super(null); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle args = getArguments(); ByteBuffer buf = ByteBuffer.wrap(args.getByteArray(ARG_FINGERPRINT)); mFingerprints = new byte[buf.remaining() / 20][]; for (int i = 0; i < mFingerprints.length; i++) { mFingerprints[i] = new byte[20]; buf.get(mFingerprints[i]); } mUserId = args.getString(ARG_USER_ID); mCardAid = args.getByteArray(ARG_CARD_AID); mMasterKeyId = args.getLong(ARG_MASTER_KEY_ID); getLoaderManager().initLoader(0, null, this); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup superContainer, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.view_key_yubikey, null); TextView vSerNo = (TextView) view.findViewById(R.id.yubikey_serno); TextView vUserId = (TextView) view.findViewById(R.id.yubikey_userid); String serno = Hex.toHexString(mCardAid, 10, 4); vSerNo.setText(getString(R.string.yubikey_serno, serno)); if (!mUserId.isEmpty()) { vUserId.setText(getString(R.string.yubikey_key_holder, mUserId)); } else { vUserId.setText(getString(R.string.yubikey_key_holder_not_set)); } vButton = (Button) view.findViewById(R.id.button_bind); vButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { promoteToSecretKey(); } }); vStatus = (TextView) view.findViewById(R.id.yubikey_status); return view; } public void promoteToSecretKey() { long[] subKeyIds = new long[mFingerprints.length]; for (int i = 0; i < subKeyIds.length; i++) { subKeyIds[i] = KeyFormattingUtils.getKeyIdFromFingerprint(mFingerprints[i]); } // mMasterKeyId and mCardAid are already set mSubKeyIds = subKeyIds; cryptoOperation(); } public static final String[] PROJECTION = new String[] { Keys._ID, Keys.KEY_ID, Keys.RANK, Keys.HAS_SECRET, Keys.FINGERPRINT }; // private static final int INDEX_KEY_ID = 1; // private static final int INDEX_RANK = 2; private static final int INDEX_HAS_SECRET = 3; private static final int INDEX_FINGERPRINT = 4; @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { return new CursorLoader(getActivity(), Keys.buildKeysUri(mMasterKeyId), PROJECTION, null, null, null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { if (!data.moveToFirst()) { // wut? return; } boolean allBound = true; boolean noneBound = true; do { SecretKeyType keyType = SecretKeyType.fromNum(data.getInt(INDEX_HAS_SECRET)); byte[] fingerprint = data.getBlob(INDEX_FINGERPRINT); Integer index = naiveIndexOf(mFingerprints, fingerprint); if (index == null) { continue; } if (keyType == SecretKeyType.DIVERT_TO_CARD) { noneBound = false; } else { allBound = false; } } while (data.moveToNext()); if (allBound) { vButton.setVisibility(View.GONE); vStatus.setText(R.string.yubikey_status_bound); } else { vButton.setVisibility(View.VISIBLE); vStatus.setText(noneBound ? R.string.yubikey_status_unbound : R.string.yubikey_status_partly); } } static private Integer naiveIndexOf(byte[][] haystack, byte[] needle) { for (int i = 0; i < haystack.length; i++) { if (Arrays.equals(needle, haystack[i])) { return i; } } return null; } @Override public void onLoaderReset(Loader<Cursor> loader) { } @Override public PromoteKeyringParcel createOperationInput() { return new PromoteKeyringParcel(mMasterKeyId, mCardAid, mSubKeyIds); } @Override public void onQueuedOperationSuccess(PromoteKeyResult result) { result.createNotify(getActivity()).show(); } }