added signature check to detect github actions builds and etc

app/src/main/java/ru/vtosters/lite/ui/fragments/VTSettings.java

@@ -25,6 +25,7 @@ import static ru.vtosters.lite.utils.Preferences.navbar;
 import static ru.vtosters.lite.utils.Preferences.offline;
 import static ru.vtosters.lite.utils.Preferences.shortinfo;
 import static ru.vtosters.lite.utils.Preferences.vkme;
+import static ru.vtosters.lite.utils.SignatureChecker.validateAppSignature;
 import static ru.vtosters.lite.utils.Themes.applyTheme;
 import static ru.vtosters.lite.utils.Themes.getDarkTheme;
 import static ru.vtosters.lite.utils.Themes.getImDarkTheme;
@@ -34,6 +35,7 @@ import static ru.vtosters.lite.utils.Themes.setTheme;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
@@ -55,6 +57,8 @@ import com.vtosters.lite.fragments.SettingsGeneralFragment;
 import com.vtosters.lite.fragments.k.BlacklistFragment;
 import com.vtosters.lite.fragments.money.music.control.subscription.MusicSubscriptionControlFragment;
 
+import java.security.NoSuchAlgorithmException;
+
 import ru.vtosters.lite.ui.PreferencesUtil;
 import ru.vtosters.lite.ui.dialogs.OTADialog;
 import ru.vtosters.lite.ui.fragments.dockbar.DockBarFragment;
@@ -337,20 +341,26 @@ public class VTSettings extends MaterialPreferenceToolbarFragment {
             return false;
         });
 
-        PreferencesUtil.addPreferenceCategory(this, getString("updates"));
+        try {
+            if (validateAppSignature()) {
+                PreferencesUtil.addPreferenceCategory(this, getString("updates"));
 
-        PreferencesUtil.addPreference(this, "", getString("checkforupdates"), "", "ic_download_24", preference -> {
-            OTADialog.checkUpdates(p());
-            return false;
-        });
+                PreferencesUtil.addPreference(this, "", getString("checkforupdates"), "", "ic_download_24", preference -> {
+                    OTADialog.checkUpdates(p());
+                    return false;
+                });
 
-        PreferencesUtil.addMaterialSwitchPreference(this, "checkupdates", getString("checkupdates"), "", "ic_recent_24", true, (preference, o) -> {
-            boolean value = (boolean) o;
+                PreferencesUtil.addMaterialSwitchPreference(this, "checkupdates", getString("checkupdates"), "", "ic_recent_24", true, (preference, o) -> {
+                    boolean value = (boolean) o;
 
-            edit().putBoolean("checkupdates", value).commit();
+                    edit().putBoolean("checkupdates", value).commit();
 
-            return true;
-        });
+                    return true;
+                });
+            }
+        } catch (PackageManager.NameNotFoundException | NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
     }
 
     public static String getValAsString(String stringid, Boolean value) {

app/src/main/java/ru/vtosters/lite/utils/Globals.java

@@ -46,6 +46,7 @@ import java.io.InputStream;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.net.URLConnection;
+import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
@@ -63,7 +64,7 @@ public class Globals {
         return preferences;
     }
 
-    public static void MainActivityInit(Activity activity) {
+    public static void MainActivityInit(Activity activity) throws PackageManager.NameNotFoundException, NoSuchAlgorithmException{
         if(checkupdates())
             OTADialog.checkUpdates(activity);
         Start.alert(activity);

app/src/main/java/ru/vtosters/lite/utils/Preferences.java

@@ -16,12 +16,14 @@ import static ru.vtosters.lite.utils.Globals.registerActivities;
 import static ru.vtosters.lite.utils.Newsfeed.setupFilters;
 import static ru.vtosters.lite.utils.OpusLoader.LoadLibrary;
 import static ru.vtosters.lite.utils.Proxy.setProxy;
+import static ru.vtosters.lite.utils.SignatureChecker.*;
 import static ru.vtosters.lite.utils.Themes.systemThemeChanger;
 
 import android.annotation.SuppressLint;
 import android.app.Application;
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
@@ -30,6 +32,7 @@ import com.vk.im.engine.models.users.UserSex;
 import com.vtosters.lite.data.Users;
 import com.vtosters.lite.fragments.SettingsListFragment;
 
+import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Locale;
@@ -361,8 +364,8 @@ public class Preferences {
         return getBoolValue("roundedmsgs", false);
     }
 
-    public static boolean checkupdates() {
-        return getBoolValue("checkupdates", true);
+    public static boolean checkupdates() throws PackageManager.NameNotFoundException, NoSuchAlgorithmException{
+        return getBoolValue("checkupdates", true) && validateAppSignature();
     }
 
     public static boolean disableanimstickers() {

app/src/main/java/ru/vtosters/lite/utils/SignatureChecker.java

@@ -0,0 +1,47 @@
+package ru.vtosters.lite.utils;
+
+import static android.content.pm.PackageManager.GET_SIGNATURES;
+import static android.content.pm.PackageManager.NameNotFoundException;
+import static ru.vtosters.lite.f0x1d.VTVerifications.decode;
+import static ru.vtosters.lite.utils.Globals.getContext;
+import static ru.vtosters.lite.utils.Globals.getPackageName;
+
+import android.annotation.SuppressLint;
+import android.content.pm.PackageInfo;
+import android.content.pm.Signature;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class SignatureChecker {
+    private static final String APP_SIGNATURE = "QzNFQTI3Q0ExNEJENzJFM0U2QUUyMDM0OTdCNDQ0NUFEQUMxRjk0NQ==";
+
+    public static String getSHA1(byte[] sig) throws NoSuchAlgorithmException{
+        MessageDigest digest = MessageDigest.getInstance("SHA1");
+        digest.update(sig);
+        byte[] hashtext = digest.digest();
+        return bytesToHex(hashtext);
+    }
+
+    public static String bytesToHex(byte[] bytes){
+        final char[] hexArray = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
+                '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+        char[] hexChars = new char[bytes.length * 2];
+        int v;
+        for (int j = 0; j < bytes.length; j++) {
+            v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+    public static boolean validateAppSignature() throws NameNotFoundException, NoSuchAlgorithmException{
+        @SuppressLint("PackageManagerGetSignatures") PackageInfo packageInfo = getContext().getPackageManager().getPackageInfo(getPackageName(), GET_SIGNATURES);
+        for (Signature signature : packageInfo.signatures) {
+            String sha1 = getSHA1(signature.toByteArray());
+            return decode(APP_SIGNATURE).equals(sha1);
+        }
+        return false;
+    }
+}