Android应用源码之KeyChain.zip项目安卓应用源码下载

/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.keychain; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.app.PendingIntent; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager; import android.content.res.Resources; import android.os.AsyncTask; import android.os.Bundle; import android.security.Credentials; import android.security.IKeyChainAliasCallback; import android.security.KeyChain; import android.security.KeyStore; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.RadioButton; import android.widget.TextView; import com.android.org.bouncycastle.asn1.x509.X509Name; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.security.cert.CertificateException; import java.security.cert.CertificateFactory; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import javax.security.auth.x500.X500Principal; public class KeyChainActivity extends Activity { private static final String TAG = "KeyChain"; private static String KEY_STATE = "state"; private static final int REQUEST_UNLOCK = 1; private int mSenderUid; private PendingIntent mSender; private static enum State { INITIAL, UNLOCK_REQUESTED }; private State mState; // beware that some of these KeyStore operations such as saw and // get do file I/O in the remote keystore process and while they // do not cause StrictMode violations, they logically should not // be done on the UI thread. private KeyStore mKeyStore = KeyStore.getInstance(); // the KeyStore.state operation is safe to do on the UI thread, it // does not do a file operation. private boolean isKeyStoreUnlocked() { return mKeyStore.state() == KeyStore.State.UNLOCKED; } @Override public void onCreate(Bundle savedState) { super.onCreate(savedState); if (savedState == null) { mState = State.INITIAL; } else { mState = (State) savedState.getSerializable(KEY_STATE); if (mState == null) { mState = State.INITIAL; } } } @Override public void onResume() { super.onResume(); mSender = getIntent().getParcelableExtra(KeyChain.EXTRA_SENDER); if (mSender == null) { // if no sender, bail, we need to identify the app to the user securely. finish(null); return; } try { mSenderUid = getPackageManager().getPackageInfo( mSender.getIntentSender().getTargetPackage(), 0).applicationInfo.uid; } catch (PackageManager.NameNotFoundException e) { // if unable to find the sender package info bail, // we need to identify the app to the user securely. finish(null); return; } // see if KeyStore has been unlocked, if not start activity to do so switch (mState) { case INITIAL: if (!isKeyStoreUnlocked()) { mState = State.UNLOCK_REQUESTED; this.startActivityForResult(new Intent(Credentials.UNLOCK_ACTION), REQUEST_UNLOCK); // Note that Credentials.unlock will start an // Activity and we will be paused but then resumed // when the unlock Activity completes and our // onActivityResult is called with REQUEST_UNLOCK return; } showCertChooserDialog(); return; case UNLOCK_REQUESTED: // we've already asked, but have not heard back, probably just rotated. // wait to hear back via onActivityResult return; default: throw new AssertionError(); } } private void showCertChooserDialog() { new AliasLoader().execute(); } private class AliasLoader extends AsyncTask<Void, Void, CertificateAdapter> { @Override protected CertificateAdapter doInBackground(Void... params) { String[] aliasArray = mKeyStore.saw(Credentials.USER_PRIVATE_KEY); List<String> aliasList = ((aliasArray == null) ? Collections.<String>emptyList() : Arrays.asList(aliasArray)); Collections.sort(aliasList); return new CertificateAdapter(aliasList); } @Override protected void onPostExecute(CertificateAdapter adapter) { displayCertChooserDialog(adapter); } } private void displayCertChooserDialog(final CertificateAdapter adapter) { AlertDialog.Builder builder = new AlertDialog.Builder(this); TextView contextView = (TextView) View.inflate(this, R.layout.cert_chooser_header, null); View footer = View.inflate(this, R.layout.cert_chooser_footer, null); final ListView lv = (ListView) View.inflate(this, R.layout.cert_chooser, null); lv.addHeaderView(contextView, null, false); lv.addFooterView(footer, null, false); lv.setAdapter(adapter); builder.setView(lv); boolean empty = adapter.mAliases.isEmpty(); int negativeLabel = empty ? android.R.string.cancel : R.string.deny_button; builder.setNegativeButton(negativeLabel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dialog.cancel(); // will cause OnDismissListener to be called } }); String title; Resources res = getResources(); if (empty) { title = res.getString(R.string.title_no_certs); } else { title = res.getString(R.string.title_select_cert); String alias = getIntent().getStringExtra(KeyChain.EXTRA_ALIAS); if (alias != null) { // if alias was requested, set it if found int adapterPosition = adapter.mAliases.indexOf(alias); if (adapterPosition != -1) { int listViewPosition = adapterPosition+1; lv.setItemChecked(listViewPosition, true); } } else if (adapter.mAliases.size() == 1) { // if only one choice, preselect it int adapterPosition = 0; int listViewPosition = adapterPosition+1; lv.setItemChecked(listViewPosition, true); } builder.setPositiveButton(R.string.allow_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { int listViewPosition = lv.getCheckedItemPosition(); int adapterPosition = listViewPosition-1; String alias = ((adapterPosition >= 0) ? adapter.getItem(adapterPosition) : null);