integrate cert4android

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "cert4android"]
+	path = cert4android
+	url = https://gitlab.com/bitfireAT/cert4android.git

app/build.gradle

@@ -24,6 +24,8 @@ android {
 }
 
 dependencies {
+    compile project(':cert4android')
+
     compile 'com.yydcdut:rxmarkdown:0.1.0'
     compile 'com.android.support:support-v4:25.3.1'
     compile 'com.android.support:appcompat-v7:25.3.1'

app/src/androidTest/java/it/niedermann/owncloud/notes/util/NotesClientUtilTest.java

@@ -15,9 +15,9 @@ public class NotesClientUtilTest extends TestCase {
     }
 
     public void testIsValidURLTest() {
-        assertTrue(NotesClientUtil.isValidURL("https://demo.owncloud.org/"));
+        assertTrue(NotesClientUtil.isValidURL(null, "https://demo.owncloud.org/"));
-        assertFalse(NotesClientUtil.isValidURL("https://www.example.com/"));
+        assertFalse(NotesClientUtil.isValidURL(null, "https://www.example.com/"));
-        assertFalse(NotesClientUtil.isValidURL("htp://www.example.com/"));
+        assertFalse(NotesClientUtil.isValidURL(null, "htp://www.example.com/"));
-        assertFalse(NotesClientUtil.isValidURL(null));
+        assertFalse(NotesClientUtil.isValidURL(null, null));
     }
 }

app/src/main/java/it/niedermann/owncloud/notes/android/activity/SettingsActivity.java

@@ -21,6 +21,7 @@ import android.widget.EditText;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import at.bitfire.cert4android.CustomCertManager;
 import it.niedermann.owncloud.notes.R;
 import it.niedermann.owncloud.notes.persistence.NoteServerSyncHelper;
 import it.niedermann.owncloud.notes.util.NotesClientUtil;
@@ -47,8 +48,10 @@ public class SettingsActivity extends AppCompatActivity {
     private TextInputLayout password_wrapper = null;
     private String old_password = "";
     private Button btn_submit = null;
+    private Button btn_cert_reset = null;
     private boolean first_run = false;
     private boolean showNotification = false;
+    private boolean trustSystemCerts = true;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -77,6 +80,29 @@ public class SettingsActivity extends AppCompatActivity {
             }
         });
 
+        trustSystemCerts = preferences.getBoolean("trustSystemCerts", true);
+        cb = (CheckBox)findViewById(R.id.settings_cert_trust_system);
+        cb.setChecked(trustSystemCerts);
+        cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                SharedPreferences.Editor editor = preferences.edit();
+                editor.putBoolean("trustSystemCerts", isChecked);
+                editor.commit();
+            }
+        });
+
+        btn_cert_reset = (Button) findViewById(R.id.settings_cert_reset);
+        btn_cert_reset.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                CustomCertManager ccm = new CustomCertManager(getApplicationContext(), true);
+                ccm.resetCertificates();
+                ccm.close();
+                Toast.makeText(getApplicationContext(), getString(R.string.settings_cert_reset_toast), Toast.LENGTH_SHORT).show();
+            }
+        });
+
         field_url = (EditText) findViewById(R.id.settings_url);
         field_username = (EditText) findViewById(R.id.settings_username);
         field_password = (EditText) findViewById(R.id.settings_password);
@@ -215,7 +241,7 @@ public class SettingsActivity extends AppCompatActivity {
 
         @Override
         protected Boolean doInBackground(String... params) {
-            return NotesClientUtil.isValidURL(params[0]);
+            return NotesClientUtil.isValidURL(getApplicationContext(), params[0]);
         }
 
         @Override
@@ -251,7 +277,7 @@ public class SettingsActivity extends AppCompatActivity {
             url = params[0];
             username = params[1];
             password = params[2];
-            return NotesClientUtil.isValidLogin(url, username, password);
+            return NotesClientUtil.isValidLogin(getApplicationContext(), url, username, password);
         }
 
         @Override

app/src/main/java/it/niedermann/owncloud/notes/persistence/NoteServerSyncHelper.java

@@ -222,7 +222,7 @@ public class NoteServerSyncHelper {
                             if (note.getRemoteId()>0) {
                                 Log.d(getClass().getSimpleName(), "   ...try to edit");
                                 try {
-                                    remoteNote = client.editNote(note);
+                                    remoteNote = client.editNote(appContext, note);
                                 } catch(FileNotFoundException e) {
                                     // Note does not exists anymore
                                 }
@@ -231,7 +231,7 @@ public class NoteServerSyncHelper {
                             // Please note, thas dbHelper.updateNote() realizes an optimistic conflict resolution, which is required for parallel changes of this Note from the UI.
                             if (remoteNote == null) {
                                 Log.d(getClass().getSimpleName(), "   ...Note does not exist on server -> (re)create");
-                                remoteNote = client.createNote(note);
+                                remoteNote = client.createNote(appContext, note);
                             }
                             dbHelper.updateNote(note.getId(), remoteNote, note);
                             break;
@@ -239,7 +239,7 @@ public class NoteServerSyncHelper {
                             if(note.getRemoteId()>0) {
                                 Log.d(getClass().getSimpleName(), "   ...delete (from server and local)");
                                 try {
-                                    client.deleteNote(note.getRemoteId());
+                                    client.deleteNote(appContext, note.getRemoteId());
                                 } catch (FileNotFoundException e) {
                                     Log.d(getClass().getSimpleName(), "   ...Note does not exist on server (anymore?) -> delete locally");
                                 }
@@ -267,7 +267,7 @@ public class NoteServerSyncHelper {
             LoginStatus status = null;
             try {
                 Map<Long, Long> idMap = dbHelper.getIdMap();
-                List<CloudNote> remoteNotes = client.getNotes();
+                List<CloudNote> remoteNotes = client.getNotes(appContext);
                 Set<Long> remoteIDs = new HashSet<>();
                 // pull remote changes: update or create each remote note
                 for (CloudNote remoteNote : remoteNotes) {

app/src/main/java/it/niedermann/owncloud/notes/util/NotesClient.java

@@ -1,5 +1,6 @@
 package it.niedermann.owncloud.notes.util;
 
+import android.content.Context;
 import android.util.Base64;
 import android.util.Log;
 
@@ -13,12 +14,12 @@ import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
-import java.net.URL;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.List;
 
+import at.bitfire.cert4android.CustomCertManager;
 import it.niedermann.owncloud.notes.model.CloudNote;
 
 public class NotesClient {
@@ -78,9 +79,9 @@ public class NotesClient {
         return new CloudNote(id, modified, title, content, favorite, category, etag);
     }
 
-    public List<CloudNote> getNotes() throws JSONException, IOException {
+    public List<CloudNote> getNotes(Context ctx) throws JSONException, IOException {
         List<CloudNote> notesList = new ArrayList<>();
-        JSONArray notes = new JSONArray(requestServer("notes", METHOD_GET, null));
+        JSONArray notes = new JSONArray(requestServer(ctx, "notes", METHOD_GET, null));
         for (int i = 0; i < notes.length(); i++) {
             JSONObject json = notes.getJSONObject(i);
             notesList.add(getNoteFromJSON(json));
@@ -97,17 +98,17 @@ public class NotesClient {
      * @throws IOException
      */
     @SuppressWarnings("unused")
-    public CloudNote getNoteById(long id) throws JSONException, IOException {
+    public CloudNote getNoteById(Context ctx, long id) throws JSONException, IOException {
-        JSONObject json = new JSONObject(requestServer("notes/" + id, METHOD_GET, null));
+        JSONObject json = new JSONObject(requestServer(ctx, "notes/" + id, METHOD_GET, null));
         return getNoteFromJSON(json);
     }
 
-    private CloudNote putNote(CloudNote note, String path, String method)  throws JSONException, IOException {
+    private CloudNote putNote(Context ctx, CloudNote note, String path, String method)  throws JSONException, IOException {
         JSONObject paramObject = new JSONObject();
         paramObject.accumulate(key_content, note.getContent());
         paramObject.accumulate(key_modified, note.getModified().getTimeInMillis()/1000);
         paramObject.accumulate(key_favorite, note.isFavorite());
-        JSONObject json = new JSONObject(requestServer(path, method, paramObject));
+        JSONObject json = new JSONObject(requestServer(ctx, path, method, paramObject));
         return getNoteFromJSON(json);
     }
 
@@ -119,17 +120,17 @@ public class NotesClient {
      * @throws JSONException
      * @throws IOException
      */
-    public CloudNote createNote(CloudNote note) throws JSONException, IOException {
+    public CloudNote createNote(Context ctx, CloudNote note) throws JSONException, IOException {
-        return putNote(note, "notes", METHOD_POST);
+        return putNote(ctx, note, "notes", METHOD_POST);
     }
 
-    public CloudNote editNote(CloudNote note) throws JSONException, IOException {
+    public CloudNote editNote(Context ctx, CloudNote note) throws JSONException, IOException {
-        return putNote(note, "notes/" + note.getRemoteId(), METHOD_PUT);
+        return putNote(ctx, note, "notes/" + note.getRemoteId(), METHOD_PUT);
     }
 
-    public void deleteNote(long noteId) throws
+    public void deleteNote(Context ctx, long noteId) throws
             IOException {
-        this.requestServer("notes/" + noteId, METHOD_DELETE, null);
+        this.requestServer(ctx, "notes/" + noteId, METHOD_DELETE, null);
     }
 
     /**
@@ -142,12 +143,13 @@ public class NotesClient {
      * @throws MalformedURLException
      * @throws IOException
      */
-    private String requestServer(String target, String method, JSONObject params)
+    private String requestServer(Context ctx, String target, String method, JSONObject params)
             throws IOException {
         StringBuffer result = new StringBuffer();
         String targetURL = url + "index.php/apps/notes/api/v0.2/" + target;
-        HttpURLConnection con = (HttpURLConnection) new URL(targetURL)
+        CustomCertManager ccm = SupportUtil.getCertManager(ctx);
-                .openConnection();
+        try {
+            HttpURLConnection con = SupportUtil.getHttpURLConnection(ccm, targetURL);
             con.setRequestMethod(method);
             con.setRequestProperty(
                     "Authorization",
@@ -170,6 +172,10 @@ public class NotesClient {
             while ((line = rd.readLine()) != null) {
                 result.append(line);
             }
+        } finally {
+            ccm.close();
+        }
+
         return result.toString();
     }
 }

app/src/main/java/it/niedermann/owncloud/notes/util/NotesClientUtil.java

@@ -1,5 +1,6 @@
 package it.niedermann.owncloud.notes.util;
 
+import android.content.Context;
 import android.util.Base64;
 import android.util.Log;
 
@@ -12,8 +13,8 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
-import java.net.URL;
 
+import at.bitfire.cert4android.CustomCertManager;
 import it.niedermann.owncloud.notes.R;
 
 /**
@@ -52,11 +53,11 @@ public class NotesClientUtil {
      * @param password String
      * @return Username and Password are a valid Login-Combination for the given URL.
      */
-    public static LoginStatus isValidLogin(String url, String username, String password) {
+    public static LoginStatus isValidLogin(Context ctx, String url, String username, String password) {
+        CustomCertManager ccm = SupportUtil.getCertManager(ctx);
         try {
             String targetURL = url + "index.php/apps/notes/api/v0.2/notes";
-            HttpURLConnection con = (HttpURLConnection) new URL(targetURL)
+            HttpURLConnection con = SupportUtil.getHttpURLConnection(ccm, targetURL);
-                    .openConnection();
             con.setRequestMethod("GET");
             con.setRequestProperty(
                     "Authorization",
@@ -89,6 +90,8 @@ public class NotesClientUtil {
         } catch (JSONException e) {
             Log.e(NotesClientUtil.class.getSimpleName(), "Exception", e);
             return LoginStatus.JSON_FAILED;
+        } finally {
+            ccm.close();
         }
     }
 
@@ -98,11 +101,11 @@ public class NotesClientUtil {
      * @param url String URL to server
      * @return true if there is a installed instance, false if not
      */
-    public static boolean isValidURL(String url) {
+    public static boolean isValidURL(Context ctx, String url) {
         StringBuilder result = new StringBuilder();
+        CustomCertManager ccm = SupportUtil.getCertManager(ctx);
         try {
-            HttpURLConnection con = (HttpURLConnection) new URL(url + "status.php")
+            HttpURLConnection con = SupportUtil.getHttpURLConnection(ccm, url + "status.php");
-                    .openConnection();
             con.setRequestMethod(NotesClient.METHOD_GET);
             con.setConnectTimeout(10 * 1000); // 10 seconds
             BufferedReader rd = new BufferedReader(new InputStreamReader(con.getInputStream()));
@@ -114,6 +117,8 @@ public class NotesClientUtil {
             return response.getBoolean("installed");
         } catch (IOException | JSONException | NullPointerException e) {
             return false;
+        } finally {
+            ccm.close();
         }
     }
 

app/src/main/java/it/niedermann/owncloud/notes/util/SupportUtil.java

@@ -1,11 +1,28 @@
 package it.niedermann.owncloud.notes.util;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Build;
+import android.preference.PreferenceManager;
 import android.text.Html;
 import android.text.Spanned;
 import android.text.method.LinkMovementMethod;
 import android.widget.TextView;
 
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+
+import at.bitfire.cert4android.CustomCertManager;
+
 /**
  * Some helper functionality in alike the Android support library.
  * Currently, it offers methods for working with HTML string resources.
@@ -37,4 +54,37 @@ public class SupportUtil {
         view.setText(SupportUtil.fromHtml(view.getResources().getString(stringId, formatArgs)));
         view.setMovementMethod(LinkMovementMethod.getInstance());
     }
+
+    /**
+     * Create a new {@link HttpURLConnection} for strUrl.
+     * If protocol equals https, then install CustomCertManager in {@link SSLContext}.
+     * @param ccm
+     * @param strUrl
+     * @return HttpURLConnection with custom trust manager
+     * @throws MalformedURLException
+     * @throws IOException
+     */
+    public static HttpURLConnection getHttpURLConnection(CustomCertManager ccm, String strUrl) throws MalformedURLException, IOException {
+        URL url = new URL(strUrl);
+        HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
+        if (ccm != null && url.getProtocol().equals("https")) {
+            HttpsURLConnection httpsCon = (HttpsURLConnection) httpCon;
+            httpsCon.setHostnameVerifier(ccm.hostnameVerifier(httpsCon.getHostnameVerifier()));
+            try {
+                SSLContext sslContext = SSLContext.getInstance("TLS");
+                sslContext.init(null, new TrustManager[]{ccm}, null);
+                httpsCon.setSSLSocketFactory(sslContext.getSocketFactory());
+            } catch (NoSuchAlgorithmException e) {
+                // ignore, use default TrustManager
+            } catch (KeyManagementException e) {
+                // ignore, use default TrustManager
+            }
+        }
+        return httpCon;
+    }
+
+    public static CustomCertManager getCertManager(Context ctx) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(ctx);
+        return new CustomCertManager(ctx, preferences.getBoolean("trustSystemCerts", true));
+    }
 }

app/src/main/res/layout/activity_settings.xml

@@ -8,6 +8,14 @@
     android:paddingLeft="16dp"
     android:paddingRight="16dp">
 
+    <TextView
+        android:id="@+id/settings_server_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/settings_server_header"
+        android:textSize="18sp"
+        android:textStyle="bold" />
+
     <android.support.design.widget.TextInputLayout
         android:id="@+id/settings_url_wrapper"
         android:layout_width="match_parent"
@@ -70,6 +78,15 @@
         android:shadowColor="@color/fg_default_low"
         android:text="@string/settings_submit" />
 
+    <TextView
+        android:id="@+id/settings_notification_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingTop="10dp"
+        android:text="@string/settings_notification_header"
+        android:textSize="18sp"
+        android:textStyle="bold" />
+
     <CheckBox
         android:id="@+id/settings_notification"
         android:layout_width="wrap_content"
@@ -77,4 +94,25 @@
         android:defaultValue="false"
         android:key="notificationCheckbox"
         android:text="@string/settings_notification" />
+
+    <TextView
+        android:id="@+id/settings_cert_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingTop="20dp"
+        android:text="@string/settings_cert_header"
+        android:textSize="18sp"
+        android:textStyle="bold" />
+
+    <CheckBox
+        android:id="@+id/settings_cert_trust_system"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/settings_cert_trust_system" />
+
+    <Button
+        android:id="@+id/settings_cert_reset"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/settings_cert_reset" />
 </LinearLayout>

app/src/main/res/values-de-rDE/strings.xml

@@ -35,6 +35,7 @@
     <string name="listview_updated_earlier">Früher</string>
 
     <!-- Settings -->
+    <string name="settings_server_header">Server Einstellungen</string>
     <string name="settings_server">Server</string>
     <string name="settings_url">Server-Adresse</string>
     <string name="settings_url_check_description">Zeigt an, ob die angegebene URL erreichbar ist.</string>
@@ -44,7 +45,16 @@
     <string name="settings_password_check_description">Zeigt an, ob die angegebenen Zugangsdaten korrekt sind.</string>
     <string name="settings_submit">Verbinden</string>
     <string name="settings_submitting">Verbindet&#8230;</string>
+    <string name="settings_notification_header">Benachrichtigung</string>
     <string name="settings_notification">Aktivieren, um eine dauerhafte Benachrichtigung zur schnellen Eingabe von Notizen anzuzeigen.</string>
+    <string name="settings_cert_header">Zertifikate</string>
+    <string name="settings_cert_trust_system">Zertifikaten aus System Trust Store vertrauen.</string>
+    <string name="settings_cert_reset">Bisher akzeptierte/abgelehnte Zertifikate zurücksetzen</string>
+    <string name="settings_cert_reset_toast">Informationen über Zertifikate zurückgesetzt.</string>
+
+    <!-- Certificates -->
+    <string name="certificate_notification_connection_security">Notizen - Verbindungssicherheit</string>
+    <string name="trust_certificate_unknown_certificate_found">Der Server nutzt ein unbekanntes Zertifikat. Soll diesem Zertifikat vertraut werden?</string>
 
     <!-- Network -->
     <string name="network_connecting">Verbinde</string>

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

@@ -35,6 +35,7 @@
     <string name="listview_updated_earlier">Früher</string>
 
     <!-- Settings -->
+    <string name="settings_server_header">Server Einstellungen</string>
     <string name="settings_server">Server</string>
     <string name="settings_url">Server-Adresse</string>
     <string name="settings_url_check_description">Zeigt an, ob die angegebene URL erreichbar ist.</string>
@@ -44,7 +45,16 @@
     <string name="settings_password_check_description">Zeigt an, ob die angegebenen Zugangsdaten korrekt sind.</string>
     <string name="settings_submit">Verbinden</string>
     <string name="settings_submitting">Verbindet&#8230;</string>
+    <string name="settings_notification_header">Benachrichtigung</string>
     <string name="settings_notification">Aktivieren um eine dauerhafte Benachrichtigung zur schnellen Eingabe von Notizen anzuzeigen.</string>
+    <string name="settings_cert_header">Zertifikate</string>
+    <string name="settings_cert_trust_system">Zertifikaten aus System Trust Store vertrauen.</string>
+    <string name="settings_cert_reset">Bisher akzeptierte/abgelehnte Zertifikate zurücksetzen</string>
+    <string name="settings_cert_reset_toast">Informationen über Zertifikate zurückgesetzt.</string>
+
+    <!-- Certificates -->
+    <string name="certificate_notification_connection_security">Notizen - Verbindungssicherheit</string>
+    <string name="trust_certificate_unknown_certificate_found">Der Server nutzt ein unbekanntes Zertifikat. Soll diesem Zertifikat vertraut werden?</string>
 
     <!-- Network -->
     <string name="network_connecting">Verbindung wird hergestellt</string>

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

@@ -35,6 +35,7 @@
     <string name="listview_updated_earlier">Earlier</string>
 
     <!-- Settings -->
+    <string name="settings_server_header">Server Settings</string>
     <string name="settings_server">Server</string>
     <string name="settings_url">Server address</string>
     <string name="settings_url_check_description">Shows if the address can be pinged.</string>
@@ -45,7 +46,16 @@
     <string name="settings_password_check_description">Shows if the credentials are correct.</string>
     <string name="settings_submit">Connect</string>
     <string name="settings_submitting">Connecting &#8230;</string>
+    <string name="settings_notification_header">Notification</string>
     <string name="settings_notification">Enable to show a persistant notification for quickly creating new notes.</string>
+    <string name="settings_cert_header">Certificates</string>
+    <string name="settings_cert_trust_system">Trust certificates from system trust store.</string>
+    <string name="settings_cert_reset">Reset trust store</string>
+    <string name="settings_cert_reset_toast">Stored trust information cleared.</string>
+
+    <!-- Certificates -->
+    <string name="certificate_notification_connection_security">Notes - Connection security</string>
+    <string name="trust_certificate_unknown_certificate_found">Notes has encountered an unknown certificate. Do you want to trust it?</string>
 
     <!-- Network -->
     <string name="network_connecting">Connecting</string>

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

@@ -13,6 +13,15 @@
         <item name="android:windowBackground">@color/bg_normal</item>
     </style>
 
+    <!--
+        cert4android is using these styles and we want the same button style in the trust activity
+    -->
+    <style name="Widget.AppCompat.Button.Borderless" parent="ocbutton">
+        <item name="android:layout_margin">2dp</item>
+    </style>
+    <style name="Widget.AppCompat.Button.Borderless.Colored" parent="Widget.AppCompat.Button.Borderless">
+    </style>
+
     <style name="fab">
         <item name="android:layout_margin">16dp</item>
         <item name="android:layout_width">wrap_content</item>

cert4android

@@ -0,0 +1 @@
+Subproject commit 9033f39d1f541b62750c2bfa9c93a893d6af2f63

settings.gradle

@@ -1 +1,2 @@
 include ':app'
+include ':cert4android'