Implement SSL error handling

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/build.gradle

@@ -129,6 +129,8 @@ dependencies {
     implementation "com.google.android.gms:play-services-gcm:${googleLibraryVersion}"
     implementation "com.google.firebase:firebase-core:${googleLibraryVersion}"
 
+    implementation 'com.yarolegovich:lovely-dialog:1.0.7'
+
     testImplementation 'junit:junit:4.12'
     androidTestImplementation ('com.android.support.test.espresso:espresso-core:3.0.1', {
         exclude group: 'com.android.support', module: 'support-annotations'

app/src/main/java/com/nextcloud/talk/activities/MainActivity.java

@@ -34,7 +34,19 @@ import com.nextcloud.talk.application.NextcloudTalkApplication;
 import com.nextcloud.talk.controllers.BottomNavigationController;
 import com.nextcloud.talk.controllers.ServerSelectionController;
 import com.nextcloud.talk.controllers.base.providers.ActionBarProvider;
+import com.nextcloud.talk.events.CertificateEvent;
 import com.nextcloud.talk.utils.database.user.UserUtils;
+import com.nextcloud.talk.utils.ssl.MagicTrustManager;
+import com.yarolegovich.lovelydialog.LovelyStandardDialog;
+
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
+import java.security.cert.CertificateParsingException;
+import java.security.cert.X509Certificate;
+import java.text.DateFormat;
+import java.util.List;
 
 import javax.inject.Inject;
 
@@ -57,6 +69,9 @@ public final class MainActivity extends AppCompatActivity implements ActionBarPr
     @Inject
     ReactiveEntityStore<Persistable> dataStore;
 
+    @Inject
+    EventBus eventBus;
+
     private Router router;
 
     @Override
@@ -72,7 +87,6 @@ public final class MainActivity extends AppCompatActivity implements ActionBarPr
 
         router = Conductor.attachRouter(this, container, savedInstanceState);
 
-
         if (!router.hasRootController() && userUtils.anyUserExists()) {
             router.setRoot(RouterTransaction.with(new BottomNavigationController(R.menu.menu_navigation))
                     .pushChangeHandler(new HorizontalChangeHandler())
@@ -90,4 +104,70 @@ public final class MainActivity extends AppCompatActivity implements ActionBarPr
             super.onBackPressed();
         }
     }
+
+    private void showCertificateDialog(X509Certificate cert, MagicTrustManager magicTrustManager) {
+        DateFormat formatter = DateFormat.getDateInstance(DateFormat.LONG);
+        String validFrom = formatter.format(cert.getNotBefore());
+        String validUntil = formatter.format(cert.getNotAfter());
+
+        String issuedBy = cert.getIssuerDN().toString();
+        String issuedFor;
+
+        try {
+            if (cert.getSubjectAlternativeNames() != null) {
+                StringBuilder stringBuilder = new StringBuilder();
+                for (Object o : cert.getSubjectAlternativeNames()) {
+                    List list = (List) o;
+                    int type = (Integer) list.get(0);
+                    if (type == 2) {
+                        String name = (String) list.get(1);
+                        stringBuilder.append("[").append(type).append("]").append(name).append(" ");
+                    }
+                }
+                issuedFor = stringBuilder.toString();
+            } else {
+                issuedFor = cert.getSubjectDN().getName();
+            }
+
+            String dialogText = String.format(getResources()
+                            .getString(R.string.nc_certificate_dialog_text), issuedBy, issuedFor,
+                    validFrom, validUntil);
+
+            new LovelyStandardDialog(this)
+                    .setTopColorRes(R.color.darkRed)
+                    .setNegativeButtonColorRes(R.color.darkRed)
+                    .setPositiveButtonColorRes(R.color.colorPrimaryDark)
+                    .setIcon(R.drawable.ic_security_white_24dp)
+                    .setTitle(R.string.nc_certificate_dialog_title)
+                    .setMessage(dialogText)
+                    .setPositiveButton(R.string.nc_yes, v -> {
+                        magicTrustManager.addCertInTrustStore(cert);
+                    })
+                    .setNegativeButton(R.string.nc_no, view1 -> {
+                        router.setRoot(RouterTransaction.with(new
+                                ServerSelectionController()));
+                    })
+                    .show();
+
+        } catch (CertificateParsingException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Subscribe(threadMode = ThreadMode.MAIN)
+    public void onMessageEvent(CertificateEvent event) {
+        showCertificateDialog(event.getX509Certificate(), event.getMagicTrustManager());
+    };
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        eventBus.register(this);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        eventBus.unregister(this);
+    }
 }

app/src/main/java/com/nextcloud/talk/controllers/ServerSelectionController.java

@@ -36,6 +36,8 @@ import com.nextcloud.talk.api.helpers.api.ApiHelper;
 import com.nextcloud.talk.application.NextcloudTalkApplication;
 import com.nextcloud.talk.controllers.base.BaseController;
 
+import java.security.cert.CertificateException;
+
 import javax.inject.Inject;
 
 import autodagger.AutoInjector;
@@ -123,10 +125,12 @@ public class ServerSelectionController extends BaseController {
                                             true);
                                 } else if (status.isNeedsUpgrade()) {
                                     textFieldBoxes.setError(String.format(getResources().
-                                            getString(R.string.nc_server_db_upgrade_needed), productName), true);
+                                                    getString(R.string.nc_server_db_upgrade_needed),
+                                            productName), true);
                                 } else if (status.isMaintenance()) {
                                     textFieldBoxes.setError(String.format(getResources().
-                                                    getString(R.string.nc_server_maintenance), productName),
+                                                    getString(R.string.nc_server_maintenance),
+                                            productName),
                                             true);
                                 } else if (!status.getProductName().equals(
                                         getResources().getString(R.string.nc_server_product_name))) {
@@ -137,7 +141,12 @@ public class ServerSelectionController extends BaseController {
                                 }
 
                             }, throwable -> {
-                                textFieldBoxes.setError(throwable.getLocalizedMessage(), true);
+                                if (throwable.getLocalizedMessage() != null) {
+                                    textFieldBoxes.setError(throwable.getLocalizedMessage(), true);
+                                } else if (throwable.getCause() instanceof CertificateException) {
+                                    textFieldBoxes.setError(getResources().getString(R.string.nc_certificate_error),
+                                            true);
+                                }
                                 if (serverEntry != null) {
                                     serverEntry.setEnabled(true);
                                 }

app/src/main/java/com/nextcloud/talk/controllers/WebViewLoginController.java

@@ -46,12 +46,15 @@ import com.nextcloud.talk.utils.bundle.BundleBuilder;
 import com.nextcloud.talk.utils.bundle.BundleKeys;
 import com.nextcloud.talk.utils.database.user.UserUtils;
 import com.nextcloud.talk.utils.ssl.MagicTrustManager;
+import com.yarolegovich.lovelydialog.LovelyStandardDialog;
 
 import java.lang.reflect.Field;
 import java.net.URLDecoder;
 import java.security.cert.CertificateException;
 import java.security.cert.X509Certificate;
+import java.text.DateFormat;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import javax.inject.Inject;
@@ -148,7 +151,9 @@ public class WebViewLoginController extends BaseController {
             @Override
             public void onPageFinished(WebView view, String url) {
                 if (!basePageLoaded) {
-                    progressBar.setVisibility(View.GONE);
+                    if (progressBar != null) {
+                        progressBar.setVisibility(View.GONE);
+                    }
                     webView.setVisibility(View.VISIBLE);
                     basePageLoaded = true;
                 }
@@ -171,8 +176,50 @@ public class WebViewLoginController extends BaseController {
                             magicTrustManager.checkServerTrusted(new X509Certificate[]{cert}, "generic");
                             handler.proceed();
                         } catch (CertificateException exception) {
-                            // cancel for now, as we don't have a way to accept custom certificates
+                            DateFormat formatter = DateFormat.getDateInstance(DateFormat.LONG);
-                            handler.cancel();
+                            String validFrom = formatter.format(cert.getNotBefore());
+                            String validUntil = formatter.format(cert.getNotAfter());
+
+                            String issuedBy = cert.getIssuerDN().toString();
+                            String issuedFor;
+
+                            if (cert.getSubjectAlternativeNames() != null) {
+                                StringBuilder stringBuilder = new StringBuilder();
+                                for (Object o : cert.getSubjectAlternativeNames()) {
+                                    List list = (List) o;
+                                    int type = (Integer) list.get(0);
+                                    if (type == 2) {
+                                        String name = (String) list.get(1);
+                                        stringBuilder.append("[").append(type).append("]").append(name).append(" ");
+                                    }
+                                }
+                                issuedFor = stringBuilder.toString();
+                            } else {
+                                issuedFor = cert.getSubjectDN().getName();
+                            }
+
+                            String dialogText = String.format(getResources()
+                                            .getString(R.string.nc_certificate_dialog_text), issuedBy, issuedFor,
+                                    validFrom, validUntil);
+
+                            new LovelyStandardDialog(getActivity())
+                                    .setTopColorRes(R.color.darkRed)
+                                    .setNegativeButtonColorRes(R.color.darkRed)
+                                    .setPositiveButtonColorRes(R.color.colorPrimaryDark)
+                                    .setIcon(R.drawable.ic_security_white_24dp)
+                                    .setTitle(R.string.nc_certificate_dialog_title)
+                                    .setMessage(dialogText)
+                                    .setPositiveButton(R.string.nc_yes, v -> {
+                                        magicTrustManager.addCertInTrustStore(cert);
+                                        handler.proceed();
+                                    })
+                                    .setNegativeButton(R.string.nc_no, view1 -> {
+                                        handler.cancel();
+                                        getRouter().setRoot(RouterTransaction.with(new
+                                                ServerSelectionController()));
+                                    })
+                                    .setCancelable(false)
+                                    .show();
                         }
                     }
                 } catch (Exception exception) {

app/src/main/java/com/nextcloud/talk/dagger/modules/RestModule.java

@@ -37,6 +37,7 @@ import com.nextcloud.talk.utils.ssl.SSLSocketFactoryCompat;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.Proxy;
+import java.util.concurrent.TimeUnit;
 
 import javax.inject.Singleton;
 
@@ -59,6 +60,8 @@ import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
 @Module(includes = DatabaseModule.class)
 public class RestModule {
 
+    private static final String TAG = "RestModule";
+
     @Provides
     @Singleton
     NcApi provideNcApi(Retrofit retrofit) {
@@ -98,7 +101,6 @@ public class RestModule {
     @Singleton
     MagicTrustManager provideMagicTrustManager() {
         return new MagicTrustManager();
-
     }
 
     @Provides
@@ -110,9 +112,14 @@ public class RestModule {
     @Provides
     @Singleton
     OkHttpClient provideHttpClient(Proxy proxy, AppPreferences appPreferences,
-                                   MagicTrustManager magicTrustManager, SSLSocketFactoryCompat sslSocketFactoryCompat) {
+                                   MagicTrustManager magicTrustManager,
+                                   SSLSocketFactoryCompat sslSocketFactoryCompat) {
         OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
 
+        httpClient.connectTimeout(30, TimeUnit.SECONDS);
+        httpClient.readTimeout(30, TimeUnit.SECONDS);
+        httpClient.writeTimeout(30, TimeUnit.SECONDS);
+
         int cacheSize = 128 * 1024 * 1024; // 128 MB
 
         httpClient.cache(new Cache(NextcloudTalkApplication.getSharedApplication().getCacheDir(), cacheSize));
@@ -125,7 +132,8 @@ public class RestModule {
         }
 
         httpClient.sslSocketFactory(sslSocketFactoryCompat, magicTrustManager);
-        httpClient.hostnameVerifier(magicTrustManager.getHostnameVerifier(OkHostnameVerifier.INSTANCE));
+        httpClient.retryOnConnectionFailure(true);
+        httpClient.hostnameVerifier(new MagicTrustManager().getHostnameVerifier(OkHostnameVerifier.INSTANCE));
 
         if (!Proxy.NO_PROXY.equals(proxy)) {
             httpClient.proxy(proxy);

app/src/main/java/com/nextcloud/talk/events/CertificateEvent.java

@@ -0,0 +1,43 @@
+/*
+ * Nextcloud Talk application
+ *
+ * @author Mario Danic
+ * Copyright (C) 2017 Mario Danic <mario@lovelyhq.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.nextcloud.talk.events;
+
+import com.nextcloud.talk.utils.ssl.MagicTrustManager;
+
+import java.security.cert.X509Certificate;
+
+public class CertificateEvent {
+    private final X509Certificate x509Certificate;
+    private final MagicTrustManager magicTrustManager;
+
+    public CertificateEvent(X509Certificate x509Certificate, MagicTrustManager magicTrustManager) {
+        this.x509Certificate = x509Certificate;
+        this.magicTrustManager = magicTrustManager;
+    }
+
+    public X509Certificate getX509Certificate() {
+        return x509Certificate;
+    }
+
+    public MagicTrustManager getMagicTrustManager() {
+        return magicTrustManager;
+    }
+}

app/src/main/java/com/nextcloud/talk/utils/PushUtils.java

@@ -36,8 +36,6 @@ import com.nextcloud.talk.persistence.entities.UserEntity;
 import com.nextcloud.talk.utils.database.user.UserUtils;
 import com.nextcloud.talk.utils.preferences.AppPreferences;
 
-import org.json.JSONObject;
-
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
@@ -103,7 +101,6 @@ public class PushUtils {
         Signature signature = null;
         PushConfigurationState pushConfigurationState;
         PublicKey publicKey;
-        JSONObject jsonObject;
         SignatureVerification signatureVerification = new SignatureVerification();
         signatureVerification.setSignatureValid(false);
 

app/src/main/java/com/nextcloud/talk/utils/ssl/MagicTrustManager.java

@@ -26,6 +26,9 @@ import android.content.Context;
 import android.util.Log;
 
 import com.nextcloud.talk.application.NextcloudTalkApplication;
+import com.nextcloud.talk.events.CertificateEvent;
+
+import org.greenrobot.eventbus.EventBus;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -50,10 +53,6 @@ public class MagicTrustManager implements X509TrustManager {
     private X509TrustManager systemTrustManager = null;
     private KeyStore trustedKeyStore = null;
 
-    public HostnameVerifier getHostnameVerifier(HostnameVerifier defaultHostNameVerifier) {
-        return new MagicHostnameVerifier(defaultHostNameVerifier);
-    }
-
     public MagicTrustManager() {
         keystoreFile = new File(NextcloudTalkApplication.getSharedApplication().getDir("CertsKeystore",
                 Context.MODE_PRIVATE), "keystore.bks");
@@ -89,15 +88,30 @@ public class MagicTrustManager implements X509TrustManager {
 
     }
 
+    public HostnameVerifier getHostnameVerifier(HostnameVerifier defaultHostNameVerifier) {
+        return new MagicHostnameVerifier(defaultHostNameVerifier);
+    }
+
     public boolean isCertInTrustStore(X509Certificate x509Certificate) {
         if (systemTrustManager != null) {
             try {
                 systemTrustManager.checkServerTrusted(new X509Certificate[]{x509Certificate}, "generic");
                 return true;
             } catch (CertificateException e) {
-                return isCertInMagicTrustStore(x509Certificate);
+                if (!isCertInMagicTrustStore(x509Certificate)) {
+                    EventBus.getDefault().post(new CertificateEvent(x509Certificate, this));
+                    long startTime = System.currentTimeMillis();
+                    while (!isCertInMagicTrustStore(x509Certificate) && System.currentTimeMillis() <=
+                            startTime + 15000) {
+                        //do nothing
+                    }
+                    return isCertInMagicTrustStore(x509Certificate);
+                } else {
+                    return true;
+                }
             }
         }
+
         return false;
     }
 
@@ -159,7 +173,6 @@ public class MagicTrustManager implements X509TrustManager {
                 return true;
             }
 
-
             try {
                 X509Certificate[] certificates = (X509Certificate[]) sslSession.getPeerCertificates();
                 if (certificates.length > 0 && certificates[0] != null && isCertInMagicTrustStore(certificates[0])) {

app/src/main/res/drawable/ic_security_white_24dp.xml

@@ -0,0 +1,25 @@
+<!--
+  ~ Nextcloud Talk application
+  ~
+  ~ @author Mario Danic
+  ~ Copyright (C) 2017 Mario Danic <mario@lovelyhq.com>
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<vector android:autoMirrored="true" android:height="24dp"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FFFFFF" android:pathData="M12,1L3,5v6c0,5.55 3.84,10.74 9,12 5.16,-1.26 9,-6.45 9,-12L21,5l-9,-4zM12,11.99h7c-0.53,4.12 -3.28,7.79 -7,8.94L12,12L5,12L5,6.3l7,-3.11v8.8z"/>
+</vector>

app/src/main/res/values/colors.xml

@@ -3,4 +3,7 @@
     <color name="colorPrimary">#0082c9</color>
     <color name="colorPrimaryDark">#006AA3</color>
     <color name="colorAccent">#007CC2</color>
+
+    <color name="darkRed">#D32F2F</color>
 </resources>
+

app/src/main/res/values/strings.xml

@@ -22,7 +22,14 @@
 
     <string name="nc_invited">Invited</string>
     <string name="nc_never">Never</string>
-
     <string name="nc_search">Search</string>
 
+    <string name="nc_certificate_dialog_title">Trust the certificate?</string>
+    <string name="nc_certificate_dialog_text">We encountered an SSL certificate issued by %1$s for %2$s and valid
+        from %3$s to %4$s. Trust it?</string>
+    <string name="nc_yes">Yes</string>
+    <string name="nc_no">No</string>
+    <string name="nc_details">Details</string>
+    <string name="nc_certificate_error">Your SSL setup prevented us from connecting</string>
+
 </resources>