907 lines
35 KiB
Java
907 lines
35 KiB
Java
/* MemorizingTrustManager - a TrustManager which asks the user about invalid
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* certificates and memorizes their decision.
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*
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* Copyright (c) 2010 Georg Lukas <georg@op-co.de>
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*
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* MemorizingTrustManager.java contains the actual trust manager and interface
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* code to create a MemorizingActivity and obtain the results.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package eu.siacs.conversations.services;
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import android.app.Application;
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import android.app.NotificationManager;
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import android.app.Service;
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import android.content.Context;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Handler;
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import android.preference.PreferenceManager;
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import androidx.appcompat.app.AppCompatActivity;
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import android.util.Base64;
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import android.util.Log;
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import android.util.SparseArray;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.URL;
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import java.security.KeyStore;
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import java.security.KeyStoreException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.cert.Certificate;
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import java.security.cert.CertificateEncodingException;
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import java.security.cert.CertificateException;
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import java.security.cert.CertificateExpiredException;
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import java.security.cert.CertificateParsingException;
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import java.security.cert.X509Certificate;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.Locale;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import java.util.regex.Pattern;
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import javax.net.ssl.HostnameVerifier;
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import javax.net.ssl.HttpsURLConnection;
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import javax.net.ssl.SSLSession;
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import javax.net.ssl.TrustManager;
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import javax.net.ssl.TrustManagerFactory;
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import javax.net.ssl.X509TrustManager;
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import eu.siacs.conversations.R;
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import eu.siacs.conversations.crypto.DomainHostnameVerifier;
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import eu.siacs.conversations.entities.MTMDecision;
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import eu.siacs.conversations.persistance.FileBackend;
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import eu.siacs.conversations.ui.MemorizingActivity;
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/**
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* A X509 trust manager implementation which asks the user about invalid
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* certificates and memorizes their decision.
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* <p>
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* The certificate validity is checked using the system default X509
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* TrustManager, creating a query Dialog if the check fails.
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* <p>
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* <b>WARNING:</b> This only works if a dedicated thread is used for
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* opening sockets!
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*/
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public class MemorizingTrustManager {
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final static String DECISION_INTENT = "de.duenndns.ssl.DECISION";
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public final static String DECISION_INTENT_ID = DECISION_INTENT + ".decisionId";
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public final static String DECISION_INTENT_CERT = DECISION_INTENT + ".cert";
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public final static String DECISION_TITLE_ID = DECISION_INTENT + ".titleId";
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final static String DECISION_INTENT_CHOICE = DECISION_INTENT + ".decisionChoice";
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final static String NO_TRUST_ANCHOR = "Trust anchor for certification path not found.";
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private static final Pattern PATTERN_IPV4 = Pattern.compile("\\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
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private static final Pattern PATTERN_IPV6_HEX4DECCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::((?:[0-9A-Fa-f]{1,4}:)*)(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
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private static final Pattern PATTERN_IPV6_6HEX4DEC = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}:){6,6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}\\z");
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private static final Pattern PATTERN_IPV6_HEXCOMPRESSED = Pattern.compile("\\A((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)\\z");
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private static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
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private final static Logger LOGGER = Logger.getLogger(MemorizingTrustManager.class.getName());
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private final static int NOTIFICATION_ID = 100509;
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static String KEYSTORE_DIR = "KeyStore";
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static String KEYSTORE_FILE = "KeyStore.bks";
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private static int decisionId = 0;
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private static SparseArray<MTMDecision> openDecisions = new SparseArray<MTMDecision>();
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Context master;
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AppCompatActivity foregroundAct;
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NotificationManager notificationManager;
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Handler masterHandler;
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private File keyStoreFile;
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private KeyStore appKeyStore;
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private X509TrustManager defaultTrustManager;
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private X509TrustManager appTrustManager;
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private String poshCacheDir;
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/**
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* Creates an instance of the MemorizingTrustManager class that falls back to a custom TrustManager.
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* <p>
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* You need to supply the application context. This has to be one of:
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* - Application
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* - Activity
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* - Service
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* <p>
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* The context is used for file management, to display the dialog /
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* notification and for obtaining translated strings.
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*
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* @param m Context for the application.
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* @param defaultTrustManager Delegate trust management to this TM. If null, the user must accept every certificate.
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*/
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public MemorizingTrustManager(Context m, X509TrustManager defaultTrustManager) {
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init(m);
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this.appTrustManager = getTrustManager(appKeyStore);
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this.defaultTrustManager = defaultTrustManager;
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}
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/**
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* Creates an instance of the MemorizingTrustManager class using the system X509TrustManager.
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* <p>
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* You need to supply the application context. This has to be one of:
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* - Application
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* - Activity
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* - Service
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* <p>
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* The context is used for file management, to display the dialog /
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* notification and for obtaining translated strings.
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*
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* @param m Context for the application.
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*/
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public MemorizingTrustManager(Context m) {
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init(m);
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this.appTrustManager = getTrustManager(appKeyStore);
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this.defaultTrustManager = getTrustManager(null);
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}
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/**
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* Changes the path for the KeyStore file.
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* <p>
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* The actual filename relative to the app's directory will be
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* <code>app_<i>dirname</i>/<i>filename</i></code>.
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*
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* @param dirname directory to store the KeyStore.
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* @param filename file name for the KeyStore.
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*/
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public static void setKeyStoreFile(String dirname, String filename) {
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KEYSTORE_DIR = dirname;
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KEYSTORE_FILE = filename;
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}
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private static boolean isIp(final String server) {
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return server != null && (
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PATTERN_IPV4.matcher(server).matches()
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|| PATTERN_IPV6.matcher(server).matches()
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|| PATTERN_IPV6_6HEX4DEC.matcher(server).matches()
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|| PATTERN_IPV6_HEX4DECCOMPRESSED.matcher(server).matches()
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|| PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches());
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}
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private static String getBase64Hash(X509Certificate certificate, String digest) throws CertificateEncodingException {
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MessageDigest md;
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try {
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md = MessageDigest.getInstance(digest);
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} catch (NoSuchAlgorithmException e) {
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return null;
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}
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md.update(certificate.getEncoded());
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return Base64.encodeToString(md.digest(), Base64.NO_WRAP);
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}
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private static String hexString(byte[] data) {
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StringBuffer si = new StringBuffer();
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for (int i = 0; i < data.length; i++) {
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si.append(String.format("%02x", data[i]));
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if (i < data.length - 1)
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si.append(":");
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}
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return si.toString();
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}
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private static String certHash(final X509Certificate cert, String digest) {
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try {
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MessageDigest md = MessageDigest.getInstance(digest);
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md.update(cert.getEncoded());
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return hexString(md.digest());
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} catch (java.security.cert.CertificateEncodingException e) {
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return e.getMessage();
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} catch (java.security.NoSuchAlgorithmException e) {
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return e.getMessage();
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}
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}
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public static void interactResult(int decisionId, int choice) {
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MTMDecision d;
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synchronized (openDecisions) {
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d = openDecisions.get(decisionId);
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openDecisions.remove(decisionId);
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}
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if (d == null) {
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LOGGER.log(Level.SEVERE, "interactResult: aborting due to stale decision reference!");
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return;
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}
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synchronized (d) {
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d.state = choice;
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d.notify();
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}
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}
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void init(Context m) {
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master = m;
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masterHandler = new Handler(m.getMainLooper());
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notificationManager = (NotificationManager) master.getSystemService(Context.NOTIFICATION_SERVICE);
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Application app;
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if (m instanceof Application) {
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app = (Application) m;
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} else if (m instanceof Service) {
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app = ((Service) m).getApplication();
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} else if (m instanceof AppCompatActivity) {
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app = ((AppCompatActivity) m).getApplication();
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} else
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throw new ClassCastException("MemorizingTrustManager context must be either Activity or Service!");
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File dir = app.getDir(KEYSTORE_DIR, Context.MODE_PRIVATE);
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keyStoreFile = new File(dir + File.separator + KEYSTORE_FILE);
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poshCacheDir = app.getCacheDir().getAbsolutePath() + "/posh_cache/";
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appKeyStore = loadAppKeyStore();
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}
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/**
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* Binds an Activity to the MTM for displaying the query dialog.
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* <p>
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* This is useful if your connection is run from a service that is
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* triggered by user interaction -- in such cases the activity is
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* visible and the user tends to ignore the service notification.
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* <p>
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* You should never have a hidden activity bound to MTM! Use this
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* function in onResume() and @see unbindDisplayActivity in onPause().
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*
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* @param act Activity to be bound
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*/
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public void bindDisplayActivity(AppCompatActivity act) {
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foregroundAct = act;
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}
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/**
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* Removes an Activity from the MTM display stack.
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* <p>
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* Always call this function when the Activity added with
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* {@link #bindDisplayActivity(AppCompatActivity)} is hidden.
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*
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* @param act Activity to be unbound
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*/
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public void unbindDisplayActivity(AppCompatActivity act) {
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// do not remove if it was overridden by a different activity
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if (foregroundAct == act)
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foregroundAct = null;
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}
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/**
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* Get a list of all certificate aliases stored in MTM.
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*
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* @return an {@link Enumeration} of all certificates
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*/
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public Enumeration<String> getCertificates() {
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try {
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return appKeyStore.aliases();
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} catch (KeyStoreException e) {
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// this should never happen, however...
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throw new RuntimeException(e);
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}
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}
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/**
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* Get a certificate for a given alias.
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*
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* @param alias the certificate's alias as returned by {@link #getCertificates()}.
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* @return the certificate associated with the alias or <tt>null</tt> if none found.
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*/
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public Certificate getCertificate(String alias) {
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try {
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return appKeyStore.getCertificate(alias);
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} catch (KeyStoreException e) {
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// this should never happen, however...
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throw new RuntimeException(e);
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}
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}
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/**
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* Removes the given certificate from MTMs key store.
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*
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* <p>
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* <b>WARNING</b>: this does not immediately invalidate the certificate. It is
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* well possible that (a) data is transmitted over still existing connections or
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* (b) new connections are created using TLS renegotiation, without a new cert
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* check.
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* </p>
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*
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* @param alias the certificate's alias as returned by {@link #getCertificates()}.
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* @throws KeyStoreException if the certificate could not be deleted.
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*/
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public void deleteCertificate(String alias) throws KeyStoreException {
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appKeyStore.deleteEntry(alias);
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keyStoreUpdated();
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}
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/**
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* Creates a new hostname verifier supporting user interaction.
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*
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* <p>This method creates a new {@link HostnameVerifier} that is bound to
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* the given instance of {@link MemorizingTrustManager}, and leverages an
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* existing {@link HostnameVerifier}. The returned verifier performs the
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* following steps, returning as soon as one of them succeeds:
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* /p>
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* <ol>
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* <li>Success, if the wrapped defaultVerifier accepts the certificate.</li>
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* <li>Success, if the server certificate is stored in the keystore under the given hostname.</li>
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* <li>Ask the user and return accordingly.</li>
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* <li>Failure on exception.</li>
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* </ol>
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*
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* @param defaultVerifier the {@link HostnameVerifier} that should perform the actual check
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* @return a new hostname verifier using the MTM's key store
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* @throws IllegalArgumentException if the defaultVerifier parameter is null
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*/
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public DomainHostnameVerifier wrapHostnameVerifier(final HostnameVerifier defaultVerifier, final boolean interactive) {
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if (defaultVerifier == null)
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throw new IllegalArgumentException("The default verifier may not be null");
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return new MemorizingHostnameVerifier(defaultVerifier, interactive);
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}
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X509TrustManager getTrustManager(KeyStore ks) {
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try {
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TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");
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tmf.init(ks);
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for (TrustManager t : tmf.getTrustManagers()) {
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if (t instanceof X509TrustManager) {
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return (X509TrustManager) t;
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}
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}
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} catch (Exception e) {
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// Here, we are covering up errors. It might be more useful
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// however to throw them out of the constructor so the
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// embedding app knows something went wrong.
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LOGGER.log(Level.SEVERE, "getTrustManager(" + ks + ")", e);
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}
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return null;
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}
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KeyStore loadAppKeyStore() {
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KeyStore ks;
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try {
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ks = KeyStore.getInstance(KeyStore.getDefaultType());
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} catch (KeyStoreException e) {
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LOGGER.log(Level.SEVERE, "getAppKeyStore()", e);
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return null;
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}
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FileInputStream fileInputStream = null;
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try {
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ks.load(null, null);
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fileInputStream = new FileInputStream(keyStoreFile);
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ks.load(fileInputStream, "MTM".toCharArray());
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} catch (java.io.FileNotFoundException e) {
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LOGGER.log(Level.INFO, "getAppKeyStore(" + keyStoreFile + ") - file does not exist");
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} catch (Exception e) {
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LOGGER.log(Level.SEVERE, "getAppKeyStore(" + keyStoreFile + ")", e);
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} finally {
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FileBackend.close(fileInputStream);
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}
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return ks;
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}
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void storeCert(String alias, Certificate cert) {
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try {
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appKeyStore.setCertificateEntry(alias, cert);
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} catch (KeyStoreException e) {
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LOGGER.log(Level.SEVERE, "storeCert(" + cert + ")", e);
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return;
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}
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keyStoreUpdated();
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}
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void storeCert(X509Certificate cert) {
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storeCert(cert.getSubjectDN().toString(), cert);
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}
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void keyStoreUpdated() {
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// reload appTrustManager
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appTrustManager = getTrustManager(appKeyStore);
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// store KeyStore to file
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java.io.FileOutputStream fos = null;
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try {
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fos = new java.io.FileOutputStream(keyStoreFile);
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appKeyStore.store(fos, "MTM".toCharArray());
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} catch (Exception e) {
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LOGGER.log(Level.SEVERE, "storeCert(" + keyStoreFile + ")", e);
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} finally {
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if (fos != null) {
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try {
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fos.close();
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} catch (IOException e) {
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LOGGER.log(Level.SEVERE, "storeCert(" + keyStoreFile + ")", e);
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}
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}
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}
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}
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// if the certificate is stored in the app key store, it is considered "known"
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private boolean isCertKnown(X509Certificate cert) {
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try {
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return appKeyStore.getCertificateAlias(cert) != null;
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} catch (KeyStoreException e) {
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return false;
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}
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}
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private boolean isExpiredException(Throwable e) {
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do {
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if (e instanceof CertificateExpiredException)
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return true;
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e = e.getCause();
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} while (e != null);
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return false;
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}
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public void checkCertTrusted(X509Certificate[] chain, String authType, String domain, boolean isServer, boolean interactive)
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throws CertificateException {
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LOGGER.log(Level.FINE, "checkCertTrusted(" + chain + ", " + authType + ", " + isServer + ")");
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try {
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LOGGER.log(Level.FINE, "checkCertTrusted: trying appTrustManager");
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if (isServer)
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appTrustManager.checkServerTrusted(chain, authType);
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else
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appTrustManager.checkClientTrusted(chain, authType);
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} catch (CertificateException ae) {
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LOGGER.log(Level.FINER, "checkCertTrusted: appTrustManager failed", ae);
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// if the cert is stored in our appTrustManager, we ignore expiredness
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if (isExpiredException(ae)) {
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LOGGER.log(Level.INFO, "checkCertTrusted: accepting expired certificate from keystore");
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return;
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}
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if (isCertKnown(chain[0])) {
|
|
LOGGER.log(Level.INFO, "checkCertTrusted: accepting cert already stored in keystore");
|
|
return;
|
|
}
|
|
try {
|
|
if (defaultTrustManager == null)
|
|
throw ae;
|
|
LOGGER.log(Level.FINE, "checkCertTrusted: trying defaultTrustManager");
|
|
if (isServer)
|
|
defaultTrustManager.checkServerTrusted(chain, authType);
|
|
else
|
|
defaultTrustManager.checkClientTrusted(chain, authType);
|
|
} catch (CertificateException e) {
|
|
boolean trustSystemCAs = !PreferenceManager.getDefaultSharedPreferences(master).getBoolean("dont_trust_system_cas", false);
|
|
if (domain != null && isServer && trustSystemCAs && !isIp(domain)) {
|
|
final String hash = getBase64Hash(chain[0], "SHA-256");
|
|
final List<String> fingerprints = getPoshFingerprints(domain);
|
|
if (hash != null && fingerprints.size() > 0) {
|
|
if (fingerprints.contains(hash)) {
|
|
Log.d("mtm", "trusted cert fingerprint of " + domain + " via posh");
|
|
return;
|
|
}
|
|
if (getPoshCacheFile(domain).delete()) {
|
|
Log.d("mtm", "deleted posh file for " + domain + " after not being able to verify");
|
|
}
|
|
}
|
|
}
|
|
if (interactive) {
|
|
interactCert(chain, authType, e);
|
|
} else {
|
|
throw e;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private List<String> getPoshFingerprints(String domain) {
|
|
List<String> cached = getPoshFingerprintsFromCache(domain);
|
|
if (cached == null) {
|
|
return getPoshFingerprintsFromServer(domain);
|
|
} else {
|
|
return cached;
|
|
}
|
|
}
|
|
|
|
private List<String> getPoshFingerprintsFromServer(String domain) {
|
|
return getPoshFingerprintsFromServer(domain, "https://" + domain + "/.well-known/posh/xmpp-client.json", -1, true);
|
|
}
|
|
|
|
private List<String> getPoshFingerprintsFromServer(String domain, String url, int maxTtl, boolean followUrl) {
|
|
Log.d("mtm", "downloading json for " + domain + " from " + url);
|
|
try {
|
|
List<String> results = new ArrayList<>();
|
|
HttpsURLConnection connection = (HttpsURLConnection) new URL(url).openConnection();
|
|
connection.setConnectTimeout(5000);
|
|
connection.setReadTimeout(5000);
|
|
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
|
|
String inputLine;
|
|
StringBuilder builder = new StringBuilder();
|
|
while ((inputLine = in.readLine()) != null) {
|
|
builder.append(inputLine);
|
|
}
|
|
JSONObject jsonObject = new JSONObject(builder.toString());
|
|
in.close();
|
|
int expires = jsonObject.getInt("expires");
|
|
if (expires <= 0) {
|
|
return new ArrayList<>();
|
|
}
|
|
if (maxTtl >= 0) {
|
|
expires = Math.min(maxTtl, expires);
|
|
}
|
|
String redirect;
|
|
try {
|
|
redirect = jsonObject.getString("url");
|
|
} catch (JSONException e) {
|
|
redirect = null;
|
|
}
|
|
if (followUrl && redirect != null && redirect.toLowerCase().startsWith("https")) {
|
|
return getPoshFingerprintsFromServer(domain, redirect, expires, false);
|
|
}
|
|
JSONArray fingerprints = jsonObject.getJSONArray("fingerprints");
|
|
for (int i = 0; i < fingerprints.length(); i++) {
|
|
JSONObject fingerprint = fingerprints.getJSONObject(i);
|
|
String sha256 = fingerprint.getString("sha-256");
|
|
if (sha256 != null) {
|
|
results.add(sha256);
|
|
}
|
|
}
|
|
writeFingerprintsToCache(domain, results, 1000L * expires + System.currentTimeMillis());
|
|
return results;
|
|
} catch (Exception e) {
|
|
Log.d("mtm", "error fetching posh " + e.getMessage());
|
|
return new ArrayList<>();
|
|
}
|
|
}
|
|
|
|
private File getPoshCacheFile(String domain) {
|
|
return new File(poshCacheDir + domain + ".json");
|
|
}
|
|
|
|
private void writeFingerprintsToCache(String domain, List<String> results, long expires) {
|
|
File file = getPoshCacheFile(domain);
|
|
file.getParentFile().mkdirs();
|
|
try {
|
|
file.createNewFile();
|
|
JSONObject jsonObject = new JSONObject();
|
|
jsonObject.put("expires", expires);
|
|
jsonObject.put("fingerprints", new JSONArray(results));
|
|
FileOutputStream outputStream = new FileOutputStream(file);
|
|
outputStream.write(jsonObject.toString().getBytes());
|
|
outputStream.flush();
|
|
outputStream.close();
|
|
} catch (Exception e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
|
|
private List<String> getPoshFingerprintsFromCache(String domain) {
|
|
File file = getPoshCacheFile(domain);
|
|
try {
|
|
InputStream is = new FileInputStream(file);
|
|
BufferedReader buf = new BufferedReader(new InputStreamReader(is));
|
|
|
|
String line = buf.readLine();
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
while (line != null) {
|
|
sb.append(line).append("\n");
|
|
line = buf.readLine();
|
|
}
|
|
JSONObject jsonObject = new JSONObject(sb.toString());
|
|
is.close();
|
|
long expires = jsonObject.getLong("expires");
|
|
long expiresIn = expires - System.currentTimeMillis();
|
|
if (expiresIn < 0) {
|
|
file.delete();
|
|
return null;
|
|
} else {
|
|
Log.d("mtm", "posh fingerprints expire in " + (expiresIn / 1000) + "s");
|
|
}
|
|
List<String> result = new ArrayList<>();
|
|
JSONArray jsonArray = jsonObject.getJSONArray("fingerprints");
|
|
for (int i = 0; i < jsonArray.length(); ++i) {
|
|
result.add(jsonArray.getString(i));
|
|
}
|
|
return result;
|
|
} catch (FileNotFoundException e) {
|
|
return null;
|
|
} catch (IOException e) {
|
|
return null;
|
|
} catch (JSONException e) {
|
|
file.delete();
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private X509Certificate[] getAcceptedIssuers() {
|
|
LOGGER.log(Level.FINE, "getAcceptedIssuers()");
|
|
return defaultTrustManager.getAcceptedIssuers();
|
|
}
|
|
|
|
private int createDecisionId(MTMDecision d) {
|
|
int myId;
|
|
synchronized (openDecisions) {
|
|
myId = decisionId;
|
|
openDecisions.put(myId, d);
|
|
decisionId += 1;
|
|
}
|
|
return myId;
|
|
}
|
|
|
|
private void certDetails(StringBuffer si, X509Certificate c) {
|
|
SimpleDateFormat validityDateFormater = new SimpleDateFormat("yyyy-MM-dd");
|
|
si.append("\n");
|
|
si.append(c.getSubjectDN().toString());
|
|
si.append("\n");
|
|
si.append(validityDateFormater.format(c.getNotBefore()));
|
|
si.append(" - ");
|
|
si.append(validityDateFormater.format(c.getNotAfter()));
|
|
si.append("\nSHA-256: ");
|
|
si.append(certHash(c, "SHA-256"));
|
|
si.append("\nSHA-1: ");
|
|
si.append(certHash(c, "SHA-1"));
|
|
si.append("\nSigned by: ");
|
|
si.append(c.getIssuerDN().toString());
|
|
si.append("\n");
|
|
}
|
|
|
|
private String certChainMessage(final X509Certificate[] chain, CertificateException cause) {
|
|
Throwable e = cause;
|
|
LOGGER.log(Level.FINE, "certChainMessage for " + e);
|
|
StringBuffer si = new StringBuffer();
|
|
if (e.getCause() != null) {
|
|
e = e.getCause();
|
|
// HACK: there is no sane way to check if the error is a "trust anchor
|
|
// not found", so we use string comparison.
|
|
if (NO_TRUST_ANCHOR.equals(e.getMessage())) {
|
|
si.append(master.getString(R.string.mtm_trust_anchor));
|
|
} else
|
|
si.append(e.getLocalizedMessage());
|
|
si.append("\n");
|
|
}
|
|
si.append("\n");
|
|
si.append(master.getString(R.string.mtm_connect_anyway));
|
|
si.append("\n\n");
|
|
si.append(master.getString(R.string.mtm_cert_details));
|
|
for (X509Certificate c : chain) {
|
|
certDetails(si, c);
|
|
}
|
|
return si.toString();
|
|
}
|
|
|
|
private String hostNameMessage(X509Certificate cert, String hostname) {
|
|
StringBuffer si = new StringBuffer();
|
|
|
|
si.append(master.getString(R.string.mtm_hostname_mismatch, hostname));
|
|
si.append("\n\n");
|
|
try {
|
|
Collection<List<?>> sans = cert.getSubjectAlternativeNames();
|
|
if (sans == null) {
|
|
si.append(cert.getSubjectDN());
|
|
si.append("\n");
|
|
} else for (List<?> altName : sans) {
|
|
Object name = altName.get(1);
|
|
if (name instanceof String) {
|
|
si.append("[");
|
|
si.append((Integer) altName.get(0));
|
|
si.append("] ");
|
|
si.append(name);
|
|
si.append("\n");
|
|
}
|
|
}
|
|
} catch (CertificateParsingException e) {
|
|
e.printStackTrace();
|
|
si.append("<Parsing error: ");
|
|
si.append(e.getLocalizedMessage());
|
|
si.append(">\n");
|
|
}
|
|
si.append("\n");
|
|
si.append(master.getString(R.string.mtm_connect_anyway));
|
|
si.append("\n\n");
|
|
si.append(master.getString(R.string.mtm_cert_details));
|
|
certDetails(si, cert);
|
|
return si.toString();
|
|
}
|
|
|
|
/**
|
|
* Returns the top-most entry of the activity stack.
|
|
*
|
|
* @return the Context of the currently bound UI or the master context if none is bound
|
|
*/
|
|
Context getUI() {
|
|
return (foregroundAct != null) ? foregroundAct : master;
|
|
}
|
|
|
|
int interact(final String message, final int titleId) {
|
|
/* prepare the MTMDecision blocker object */
|
|
MTMDecision choice = new MTMDecision();
|
|
final int myId = createDecisionId(choice);
|
|
|
|
masterHandler.post(new Runnable() {
|
|
public void run() {
|
|
Intent ni = new Intent(master, MemorizingActivity.class);
|
|
ni.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
|
|
ni.setData(Uri.parse(MemorizingTrustManager.class.getName() + "/" + myId));
|
|
ni.putExtra(DECISION_INTENT_ID, myId);
|
|
ni.putExtra(DECISION_INTENT_CERT, message);
|
|
ni.putExtra(DECISION_TITLE_ID, titleId);
|
|
|
|
// we try to directly start the activity and fall back to
|
|
// making a notification
|
|
try {
|
|
getUI().startActivity(ni);
|
|
} catch (Exception e) {
|
|
LOGGER.log(Level.FINE, "startActivity(MemorizingActivity)", e);
|
|
}
|
|
}
|
|
});
|
|
|
|
LOGGER.log(Level.FINE, "openDecisions: " + openDecisions + ", waiting on " + myId);
|
|
try {
|
|
synchronized (choice) {
|
|
choice.wait();
|
|
}
|
|
} catch (InterruptedException e) {
|
|
LOGGER.log(Level.FINER, "InterruptedException", e);
|
|
}
|
|
LOGGER.log(Level.FINE, "finished wait on " + myId + ": " + choice.state);
|
|
return choice.state;
|
|
}
|
|
|
|
void interactCert(final X509Certificate[] chain, String authType, CertificateException cause)
|
|
throws CertificateException {
|
|
switch (interact(certChainMessage(chain, cause), R.string.mtm_accept_cert)) {
|
|
case MTMDecision.DECISION_ALWAYS:
|
|
storeCert(chain[0]); // only store the server cert, not the whole chain
|
|
case MTMDecision.DECISION_ONCE:
|
|
break;
|
|
default:
|
|
throw (cause);
|
|
}
|
|
}
|
|
|
|
boolean interactHostname(X509Certificate cert, String hostname) {
|
|
switch (interact(hostNameMessage(cert, hostname), R.string.mtm_accept_servername)) {
|
|
case MTMDecision.DECISION_ALWAYS:
|
|
storeCert(hostname, cert);
|
|
case MTMDecision.DECISION_ONCE:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public X509TrustManager getNonInteractive(String domain) {
|
|
return new NonInteractiveMemorizingTrustManager(domain);
|
|
}
|
|
|
|
public X509TrustManager getInteractive(String domain) {
|
|
return new InteractiveMemorizingTrustManager(domain);
|
|
}
|
|
|
|
public X509TrustManager getNonInteractive() {
|
|
return new NonInteractiveMemorizingTrustManager(null);
|
|
}
|
|
|
|
public X509TrustManager getInteractive() {
|
|
return new InteractiveMemorizingTrustManager(null);
|
|
}
|
|
|
|
class MemorizingHostnameVerifier implements DomainHostnameVerifier {
|
|
private final HostnameVerifier defaultVerifier;
|
|
private final boolean interactive;
|
|
|
|
public MemorizingHostnameVerifier(HostnameVerifier wrapped, boolean interactive) {
|
|
this.defaultVerifier = wrapped;
|
|
this.interactive = interactive;
|
|
}
|
|
|
|
@Override
|
|
public boolean verify(String domain, String hostname, SSLSession session) {
|
|
LOGGER.log(Level.FINE, "hostname verifier for " + domain + ", trying default verifier first");
|
|
// if the default verifier accepts the hostname, we are done
|
|
if (defaultVerifier instanceof DomainHostnameVerifier) {
|
|
if (((DomainHostnameVerifier) defaultVerifier).verify(domain, hostname, session)) {
|
|
return true;
|
|
}
|
|
} else {
|
|
if (defaultVerifier.verify(domain, session)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
|
|
// otherwise, we check if the hostname is an alias for this cert in our keystore
|
|
try {
|
|
X509Certificate cert = (X509Certificate) session.getPeerCertificates()[0];
|
|
//Log.d(TAG, "cert: " + cert);
|
|
if (cert.equals(appKeyStore.getCertificate(domain.toLowerCase(Locale.US)))) {
|
|
LOGGER.log(Level.FINE, "certificate for " + domain + " is in our keystore. accepting.");
|
|
return true;
|
|
} else {
|
|
LOGGER.log(Level.FINE, "server " + domain + " provided wrong certificate, asking user.");
|
|
if (interactive) {
|
|
return interactHostname(cert, domain);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
} catch (Exception e) {
|
|
e.printStackTrace();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean verify(String domain, SSLSession sslSession) {
|
|
return verify(domain, null, sslSession);
|
|
}
|
|
}
|
|
|
|
private class NonInteractiveMemorizingTrustManager implements X509TrustManager {
|
|
|
|
private final String domain;
|
|
|
|
public NonInteractiveMemorizingTrustManager(String domain) {
|
|
this.domain = domain;
|
|
}
|
|
|
|
@Override
|
|
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
|
|
MemorizingTrustManager.this.checkCertTrusted(chain, authType, domain, false, false);
|
|
}
|
|
|
|
@Override
|
|
public void checkServerTrusted(X509Certificate[] chain, String authType)
|
|
throws CertificateException {
|
|
MemorizingTrustManager.this.checkCertTrusted(chain, authType, domain, true, false);
|
|
}
|
|
|
|
@Override
|
|
public X509Certificate[] getAcceptedIssuers() {
|
|
return MemorizingTrustManager.this.getAcceptedIssuers();
|
|
}
|
|
|
|
}
|
|
|
|
private class InteractiveMemorizingTrustManager implements X509TrustManager {
|
|
private final String domain;
|
|
|
|
public InteractiveMemorizingTrustManager(String domain) {
|
|
this.domain = domain;
|
|
}
|
|
|
|
@Override
|
|
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
|
|
MemorizingTrustManager.this.checkCertTrusted(chain, authType, domain, false, true);
|
|
}
|
|
|
|
@Override
|
|
public void checkServerTrusted(X509Certificate[] chain, String authType)
|
|
throws CertificateException {
|
|
MemorizingTrustManager.this.checkCertTrusted(chain, authType, domain, true, true);
|
|
}
|
|
|
|
@Override
|
|
public X509Certificate[] getAcceptedIssuers() {
|
|
return MemorizingTrustManager.this.getAcceptedIssuers();
|
|
}
|
|
}
|
|
}
|