diff --git a/src/main/java/eu/siacs/conversations/services/MemorizingTrustManager.java b/src/main/java/eu/siacs/conversations/services/MemorizingTrustManager.java index bb028f96c..7caf80da0 100644 --- a/src/main/java/eu/siacs/conversations/services/MemorizingTrustManager.java +++ b/src/main/java/eu/siacs/conversations/services/MemorizingTrustManager.java @@ -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 openDecisions = new SparseArray(); - - 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 - * app_dirname/filename. - * - * @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 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 null 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. - * - *

- * WARNING: 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. - *

- * @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. - * - *

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: - *

- *
    - *
  1. Success, if the wrapped defaultVerifier accepts the certificate.
    2. - *
  2. Success, if the server certificate is stored in the keystore under the given hostname.
    3. - *
  3. Ask the user and return accordingly.
    4. - *
  4. Failure on exception.
    5. - *
- * - * @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 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 getPoshFingerprints(String domain) { - List cached = getPoshFingerprintsFromCache(domain); - if (cached == null) { - return getPoshFingerprintsFromServer(domain); - } else { - return cached; - } - } - - private List getPoshFingerprintsFromServer(String domain) { - return getPoshFingerprintsFromServer(domain, "https://"+domain+"/.well-known/posh/xmpp-client.json",-1,true); - } - - private List getPoshFingerprintsFromServer(String domain, String url, int maxTtl, boolean followUrl) { - Log.d("mtm","downloading json for "+domain+" from "+url); - try { - List 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 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 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 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> 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("\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 openDecisions = new SparseArray(); + 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. + *

+ * 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); + } + + /** + * Changes the path for the KeyStore file. + *

+ * The actual filename relative to the app's directory will be + * app_dirname/filename. + * + * @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. + *

+ * 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; + } + + /** + * Get a list of all certificate aliases stored in MTM. + * + * @return an {@link Enumeration} of all certificates + */ + public Enumeration 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 null 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. + * + *

+ * WARNING: 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. + *

+ * + * @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. + * + *

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> + *

    + *
  1. Success, if the wrapped defaultVerifier accepts the certificate.
    2. + *
  2. Success, if the server certificate is stored in the keystore under the given hostname.
    3. + *
  3. Ask the user and return accordingly.
    4. + *
  4. Failure on exception.
    5. + *
+ * + * @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 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 getPoshFingerprints(String domain) { + List cached = getPoshFingerprintsFromCache(domain); + if (cached == null) { + return getPoshFingerprintsFromServer(domain); + } else { + return cached; + } + } + + private List getPoshFingerprintsFromServer(String domain) { + return getPoshFingerprintsFromServer(domain, "https://" + domain + "/.well-known/posh/xmpp-client.json", -1, true); + } + + private List getPoshFingerprintsFromServer(String domain, String url, int maxTtl, boolean followUrl) { + Log.d("mtm", "downloading json for " + domain + " from " + url); + try { + List 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 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 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 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> 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("\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(); + } + } }