@@ -26,18 +26,18 @@
*/
package eu.siacs.conversations.services;
-import android.support.v7.app.AppCompatActivity ;
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.os.Handler;
import android.preference.PreferenceManager;
+import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.util.SparseArray;
-import android.os.Handler;
import org.json.JSONArray;
import org.json.JSONException;
@@ -52,19 +52,24 @@ 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.security.NoSuchAlgorithmException;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateExpiredException;
+import java.security.cert.CertificateParsingException;
+import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
+import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.List;
import java.util.Locale;
+import java.util.logging.Level;
+import java.util.logging.Logger;
import java.util.regex.Pattern;
import javax.net.ssl.HostnameVerifier;
@@ -77,6 +82,7 @@ import javax.net.ssl.X509TrustManager;
import eu.siacs.conversations.R;
import eu.siacs.conversations.crypto.DomainHostnameVerifier;
import eu.siacs.conversations.entities.MTMDecision;
+import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.ui.MemorizingActivity;
/**
@@ -92,812 +98,809 @@ import eu.siacs.conversations.ui.MemorizingActivity;
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;
- AppCompatActivity 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 AppCompatActivity) {
- app = ((AppCompatActivity)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.getCacheDir().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(AppCompatActivity act) {
- foregroundAct = act;
- }
-
- /**
- * Removes an Activity from the MTM display stack.
- *
- * Always call this function when the Activity added with
- * {@link #bindDisplayActivity(AppCompatActivity)} is hidden.
- *
- * @param act Activity to be unbound
- */
- public void unbindDisplayActivity(AppCompatActivity 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)) {
- 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 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();
- }
- }
+ 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";
+ public final static String DECISION_TITLE_ID = DECISION_INTENT + ".titleId";
+ final static String DECISION_INTENT_CHOICE = DECISION_INTENT + ".decisionChoice";
+ final static String NO_TRUST_ANCHOR = "Trust anchor for certification path not found.";
+ 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");
+ private final static Logger LOGGER = Logger.getLogger(MemorizingTrustManager.class.getName());
+ private final static int NOTIFICATION_ID = 100509;
+ static String KEYSTORE_DIR = "KeyStore";
+ static String KEYSTORE_FILE = "KeyStore.bks";
+ private static int decisionId = 0;
+ private static SparseArray<MTMDecision> openDecisions = new SparseArray<MTMDecision>();
+ Context master;
+ AppCompatActivity foregroundAct;
+ NotificationManager notificationManager;
+ 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.
+ * <p>
+ * You need to supply the application context. This has to be one of:
+ * - Application
+ * - Activity
+ * - Service
+ * <p>
+ * 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.
+ * <p>
+ * You need to supply the application context. This has to be one of:
+ * - Application
+ * - Activity
+ * - Service
+ * <p>
+ * 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);
+ }
+
+ /**
+ * Changes the path for the KeyStore file.
+ * <p>
+ * 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;
+ }
+
+ 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 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();
+ }
+ }
+
+ 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();
+ }
+ }
+
+ 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 AppCompatActivity) {
+ app = ((AppCompatActivity) 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.getCacheDir().getAbsolutePath() + "/posh_cache/";
+
+ appKeyStore = loadAppKeyStore();
+ }
+
+ /**
+ * Binds an Activity to the MTM for displaying the query dialog.
+ * <p>
+ * 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.
+ * <p>
+ * 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(AppCompatActivity act) {
+ foregroundAct = act;
+ }
+
+ /**
+ * Removes an Activity from the MTM display stack.
+ * <p>
+ * Always call this function when the Activity added with
+ * {@link #bindDisplayActivity(AppCompatActivity)} is hidden.
+ *
+ * @param act Activity to be unbound
+ */
+ public void unbindDisplayActivity(AppCompatActivity act) {
+ // do not remove if it was overridden by a different activity
+ if (foregroundAct == act)
+ foregroundAct = null;
+ }
+
+ /**
+ * 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;
+ }
+ FileInputStream fileInputStream = null;
+ try {
+ ks.load(null, null);
+ fileInputStream = new FileInputStream(keyStoreFile);
+ ks.load(fileInputStream, "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);
+ } finally {
+ FileBackend.close(fileInputStream);
+ }
+ 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)) {
+ 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();
+ }
+ }
}