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+/* MemorizingTrustManager - a TrustManager which asks the user about invalid
+ * certificates and memorizes their decision.
+ *
+ * Copyright (c) 2010 Georg Lukas <georg@op-co.de>
+ *
+ * MemorizingTrustManager.java contains the actual trust manager and interface
+ * code to create a MemorizingActivity and obtain the results.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package de.pixart.messenger.services;
+
+import android.app.Activity;
+import android.app.Application;
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.preference.PreferenceManager;
+import android.util.Base64;
+import android.util.Log;
+import android.util.SparseArray;
+import android.os.Handler;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.*;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.MessageDigest;
+import java.util.ArrayList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.text.SimpleDateFormat;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Pattern;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.TrustManagerFactory;
+import javax.net.ssl.X509TrustManager;
+
+import de.pixart.messenger.R;
+import de.pixart.messenger.crypto.DomainHostnameVerifier;
+import de.pixart.messenger.entities.MTMDecision;
+import de.pixart.messenger.ui.MemorizingActivity;
+
+/**
+ * A X509 trust manager implementation which asks the user about invalid
+ * certificates and memorizes their decision.
+ * <p>
+ * The certificate validity is checked using the system default X509
+ * TrustManager, creating a query Dialog if the check fails.
+ * <p>
+ * <b>WARNING:</b> This only works if a dedicated thread is used for
+ * opening sockets!
+ */
+public class MemorizingTrustManager {
+
+
+ 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");
+ 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");
+ 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");
+ 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");
+ private static final Pattern PATTERN_IPV6 = Pattern.compile("\\A(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}\\z");
+
+ final static String DECISION_INTENT = "de.duenndns.ssl.DECISION";
+ public final static String DECISION_INTENT_ID = DECISION_INTENT + ".decisionId";
+ public final static String DECISION_INTENT_CERT = DECISION_INTENT + ".cert";
+ final static String DECISION_INTENT_CHOICE = DECISION_INTENT + ".decisionChoice";
+
+ private final static Logger LOGGER = Logger.getLogger(MemorizingTrustManager.class.getName());
+ public final static String DECISION_TITLE_ID = DECISION_INTENT + ".titleId";
+ private final static int NOTIFICATION_ID = 100509;
+
+ final static String NO_TRUST_ANCHOR = "Trust anchor for certification path not found.";
+
+ static String KEYSTORE_DIR = "KeyStore";
+ static String KEYSTORE_FILE = "KeyStore.bks";
+
+ Context master;
+ Activity foregroundAct;
+ NotificationManager notificationManager;
+ private static int decisionId = 0;
+ private static SparseArray<MTMDecision> openDecisions = new SparseArray<MTMDecision>();
+
+ Handler masterHandler;
+ private File keyStoreFile;
+ private KeyStore appKeyStore;
+ private X509TrustManager defaultTrustManager;
+ private X509TrustManager appTrustManager;
+ private String poshCacheDir;
+
+ /** Creates an instance of the MemorizingTrustManager class that falls back to a custom TrustManager.
+ *
+ * You need to supply the application context. This has to be one of:
+ * - Application
+ * - Activity
+ * - Service
+ *
+ * The context is used for file management, to display the dialog /
+ * notification and for obtaining translated strings.
+ *
+ * @param m Context for the application.
+ * @param defaultTrustManager Delegate trust management to this TM. If null, the user must accept every certificate.
+ */
+ public MemorizingTrustManager(Context m, X509TrustManager defaultTrustManager) {
+ init(m);
+ this.appTrustManager = getTrustManager(appKeyStore);
+ this.defaultTrustManager = defaultTrustManager;
+ }
+
+ /** Creates an instance of the MemorizingTrustManager class using the system X509TrustManager.
+ *
+ * You need to supply the application context. This has to be one of:
+ * - Application
+ * - Activity
+ * - Service
+ *
+ * The context is used for file management, to display the dialog /
+ * notification and for obtaining translated strings.
+ *
+ * @param m Context for the application.
+ */
+ public MemorizingTrustManager(Context m) {
+ init(m);
+ this.appTrustManager = getTrustManager(appKeyStore);
+ this.defaultTrustManager = getTrustManager(null);
+ }
+
+ void init(Context m) {
+ master = m;
+ masterHandler = new Handler(m.getMainLooper());
+ notificationManager = (NotificationManager)master.getSystemService(Context.NOTIFICATION_SERVICE);
+
+ Application app;
+ if (m instanceof Application) {
+ app = (Application)m;
+ } else if (m instanceof Service) {
+ app = ((Service)m).getApplication();
+ } else if (m instanceof Activity) {
+ app = ((Activity)m).getApplication();
+ } else throw new ClassCastException("MemorizingTrustManager context must be either Activity or Service!");
+
+ File dir = app.getDir(KEYSTORE_DIR, Context.MODE_PRIVATE);
+ keyStoreFile = new File(dir + File.separator + KEYSTORE_FILE);
+
+ poshCacheDir = app.getFilesDir().getAbsolutePath()+"/posh_cache/";
+
+ appKeyStore = loadAppKeyStore();
+ }
+
+
+ /**
+ * Binds an Activity to the MTM for displaying the query dialog.
+ *
+ * This is useful if your connection is run from a service that is
+ * triggered by user interaction -- in such cases the activity is
+ * visible and the user tends to ignore the service notification.
+ *
+ * You should never have a hidden activity bound to MTM! Use this
+ * function in onResume() and @see unbindDisplayActivity in onPause().
+ *
+ * @param act Activity to be bound
+ */
+ public void bindDisplayActivity(Activity act) {
+ foregroundAct = act;
+ }
+
+ /**
+ * Removes an Activity from the MTM display stack.
+ *
+ * Always call this function when the Activity added with
+ * {@link #bindDisplayActivity(Activity)} is hidden.
+ *
+ * @param act Activity to be unbound
+ */
+ public void unbindDisplayActivity(Activity act) {
+ // do not remove if it was overridden by a different activity
+ if (foregroundAct == act)
+ foregroundAct = null;
+ }
+
+ /**
+ * Changes the path for the KeyStore file.
+ *
+ * The actual filename relative to the app's directory will be
+ * <code>app_<i>dirname</i>/<i>filename</i></code>.
+ *
+ * @param dirname directory to store the KeyStore.
+ * @param filename file name for the KeyStore.
+ */
+ public static void setKeyStoreFile(String dirname, String filename) {
+ KEYSTORE_DIR = dirname;
+ KEYSTORE_FILE = filename;
+ }
+
+ /**
+ * Get a list of all certificate aliases stored in MTM.
+ *
+ * @return an {@link Enumeration} of all certificates
+ */
+ public Enumeration<String> getCertificates() {
+ try {
+ return appKeyStore.aliases();
+ } catch (KeyStoreException e) {
+ // this should never happen, however...
+ throw new RuntimeException(e);
+ }
+ }
+
+ /**
+ * Get a certificate for a given alias.
+ *
+ * @param alias the certificate's alias as returned by {@link #getCertificates()}.
+ *
+ * @return the certificate associated with the alias or <tt>null</tt> if none found.
+ */
+ public Certificate getCertificate(String alias) {
+ try {
+ return appKeyStore.getCertificate(alias);
+ } catch (KeyStoreException e) {
+ // this should never happen, however...
+ throw new RuntimeException(e);
+ }
+ }
+
+ /**
+ * Removes the given certificate from MTMs key store.
+ *
+ * <p>
+ * <b>WARNING</b>: this does not immediately invalidate the certificate. It is
+ * well possible that (a) data is transmitted over still existing connections or
+ * (b) new connections are created using TLS renegotiation, without a new cert
+ * check.
+ * </p>
+ * @param alias the certificate's alias as returned by {@link #getCertificates()}.
+ *
+ * @throws KeyStoreException if the certificate could not be deleted.
+ */
+ public void deleteCertificate(String alias) throws KeyStoreException {
+ appKeyStore.deleteEntry(alias);
+ keyStoreUpdated();
+ }
+
+ /**
+ * Creates a new hostname verifier supporting user interaction.
+ *
+ * <p>This method creates a new {@link HostnameVerifier} that is bound to
+ * the given instance of {@link MemorizingTrustManager}, and leverages an
+ * existing {@link HostnameVerifier}. The returned verifier performs the
+ * following steps, returning as soon as one of them succeeds:
+ * </p>
+ * <ol>
+ * <li>Success, if the wrapped defaultVerifier accepts the certificate.</li>
+ * <li>Success, if the server certificate is stored in the keystore under the given hostname.</li>
+ * <li>Ask the user and return accordingly.</li>
+ * <li>Failure on exception.</li>
+ * </ol>
+ *
+ * @param defaultVerifier the {@link HostnameVerifier} that should perform the actual check
+ * @return a new hostname verifier using the MTM's key store
+ *
+ * @throws IllegalArgumentException if the defaultVerifier parameter is null
+ */
+ public DomainHostnameVerifier wrapHostnameVerifier(final HostnameVerifier defaultVerifier, final boolean interactive) {
+ if (defaultVerifier == null)
+ throw new IllegalArgumentException("The default verifier may not be null");
+
+ return new MemorizingHostnameVerifier(defaultVerifier, interactive);
+ }
+
+ X509TrustManager getTrustManager(KeyStore ks) {
+ try {
+ TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");
+ tmf.init(ks);
+ for (TrustManager t : tmf.getTrustManagers()) {
+ if (t instanceof X509TrustManager) {
+ return (X509TrustManager)t;
+ }
+ }
+ } catch (Exception e) {
+ // Here, we are covering up errors. It might be more useful
+ // however to throw them out of the constructor so the
+ // embedding app knows something went wrong.
+ LOGGER.log(Level.SEVERE, "getTrustManager(" + ks + ")", e);
+ }
+ return null;
+ }
+
+ KeyStore loadAppKeyStore() {
+ KeyStore ks;
+ try {
+ ks = KeyStore.getInstance(KeyStore.getDefaultType());
+ } catch (KeyStoreException e) {
+ LOGGER.log(Level.SEVERE, "getAppKeyStore()", e);
+ return null;
+ }
+ try {
+ ks.load(null, null);
+ ks.load(new java.io.FileInputStream(keyStoreFile), "MTM".toCharArray());
+ } catch (java.io.FileNotFoundException e) {
+ LOGGER.log(Level.INFO, "getAppKeyStore(" + keyStoreFile + ") - file does not exist");
+ } catch (Exception e) {
+ LOGGER.log(Level.SEVERE, "getAppKeyStore(" + keyStoreFile + ")", e);
+ }
+ return ks;
+ }
+
+ void storeCert(String alias, Certificate cert) {
+ try {
+ appKeyStore.setCertificateEntry(alias, cert);
+ } catch (KeyStoreException e) {
+ LOGGER.log(Level.SEVERE, "storeCert(" + cert + ")", e);
+ return;
+ }
+ keyStoreUpdated();
+ }
+
+ void storeCert(X509Certificate cert) {
+ storeCert(cert.getSubjectDN().toString(), cert);
+ }
+
+ void keyStoreUpdated() {
+ // reload appTrustManager
+ appTrustManager = getTrustManager(appKeyStore);
+
+ // store KeyStore to file
+ java.io.FileOutputStream fos = null;
+ try {
+ fos = new java.io.FileOutputStream(keyStoreFile);
+ appKeyStore.store(fos, "MTM".toCharArray());
+ } catch (Exception e) {
+ LOGGER.log(Level.SEVERE, "storeCert(" + keyStoreFile + ")", e);
+ } finally {
+ if (fos != null) {
+ try {
+ fos.close();
+ } catch (IOException e) {
+ LOGGER.log(Level.SEVERE, "storeCert(" + keyStoreFile + ")", e);
+ }
+ }
+ }
+ }
+
+ // if the certificate is stored in the app key store, it is considered "known"
+ private boolean isCertKnown(X509Certificate cert) {
+ try {
+ return appKeyStore.getCertificateAlias(cert) != null;
+ } catch (KeyStoreException e) {
+ return false;
+ }
+ }
+
+ private boolean isExpiredException(Throwable e) {
+ do {
+ if (e instanceof CertificateExpiredException)
+ return true;
+ e = e.getCause();
+ } while (e != null);
+ return false;
+ }
+
+ public void checkCertTrusted(X509Certificate[] chain, String authType, String domain, boolean isServer, boolean interactive)
+ throws CertificateException
+ {
+ LOGGER.log(Level.FINE, "checkCertTrusted(" + chain + ", " + authType + ", " + isServer + ")");
+ try {
+ LOGGER.log(Level.FINE, "checkCertTrusted: trying appTrustManager");
+ if (isServer)
+ appTrustManager.checkServerTrusted(chain, authType);
+ else
+ appTrustManager.checkClientTrusted(chain, authType);
+ } catch (CertificateException ae) {
+ LOGGER.log(Level.FINER, "checkCertTrusted: appTrustManager failed", ae);
+ // if the cert is stored in our appTrustManager, we ignore expiredness
+ if (isExpiredException(ae)) {
+ LOGGER.log(Level.INFO, "checkCertTrusted: accepting expired certificate from keystore");
+ return;
+ }
+ 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)) {
+ String hash = getBase64Hash(chain[0],"SHA-256");
+ List<String> fingerprints = getPoshFingerprints(domain);
+ if (hash != null && fingerprints.contains(hash)) {
+ Log.d("mtm","trusted cert fingerprint of "+domain+" via posh");
+ return;
+ }
+ }
+ e.printStackTrace();
+ 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 static boolean isIp(final String server) {
+ return server != null && (
+ PATTERN_IPV4.matcher(server).matches()
+ || PATTERN_IPV6.matcher(server).matches()
+ || PATTERN_IPV6_6HEX4DEC.matcher(server).matches()
+ || PATTERN_IPV6_HEX4DECCOMPRESSED.matcher(server).matches()
+ || PATTERN_IPV6_HEXCOMPRESSED.matcher(server).matches());
+ }
+
+ private static String getBase64Hash(X509Certificate certificate, String digest) throws CertificateEncodingException {
+ MessageDigest md;
+ try {
+ md = MessageDigest.getInstance(digest);
+ } catch (NoSuchAlgorithmException e) {
+ return null;
+ }
+ md.update(certificate.getEncoded());
+ return Base64.encodeToString(md.digest(),Base64.NO_WRAP);
+ }
+
+ 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 static String hexString(byte[] data) {
+ StringBuffer si = new StringBuffer();
+ for (int i = 0; i < data.length; i++) {
+ si.append(String.format("%02x", data[i]));
+ if (i < data.length - 1)
+ si.append(":");
+ }
+ return si.toString();
+ }
+
+ private static String certHash(final X509Certificate cert, String digest) {
+ try {
+ MessageDigest md = MessageDigest.getInstance(digest);
+ md.update(cert.getEncoded());
+ return hexString(md.digest());
+ } catch (java.security.cert.CertificateEncodingException e) {
+ return e.getMessage();
+ } catch (java.security.NoSuchAlgorithmException e) {
+ return e.getMessage();
+ }
+ }
+
+ 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 static void interactResult(int decisionId, int choice) {
+ MTMDecision d;
+ synchronized(openDecisions) {
+ d = openDecisions.get(decisionId);
+ openDecisions.remove(decisionId);
+ }
+ if (d == null) {
+ LOGGER.log(Level.SEVERE, "interactResult: aborting due to stale decision reference!");
+ return;
+ }
+ synchronized(d) {
+ d.state = choice;
+ d.notify();
+ }
+ }
+
+ 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);
+ }
+ }
+
+
+ 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);
+ }
+
+ 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();
+ }
+ }
+} \ No newline at end of file