From 120611879c44ca214ead40d59c34acfbc4b09001 Mon Sep 17 00:00:00 2001
From: Igor Eisberg <8811086+IgorEisberg@users.noreply.github.com>
Date: Sun, 19 Feb 2023 13:57:03 +0200
Subject: [PATCH] fix: accept empty resources.arsc (#2998)

* fix: accept empty resources.arsc

* fix: accept empty resources.arsc (fix isFrameworkApk=true)
---
 .../src/main/java/brut/androlib/Androlib.java  |  2 +-
 .../main/java/brut/androlib/mod/SmaliMod.java  |  2 +-
 .../brut/androlib/res/AndrolibResources.java   | 18 ++++++++----------
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
index 0158f6a351..4bc7c18205 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
@@ -776,7 +776,7 @@ public void emptyFrameworkDirectory() throws AndrolibException {
 
     public boolean isFrameworkApk(ResTable resTable) {
         for (ResPackage pkg : resTable.listMainPackages()) {
-            if (pkg.getId() < 64) {
+            if (pkg.getId() > 0 && pkg.getId() < 64) {
                 return true;
             }
         }
diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
index 5fccb67102..8b0b9724c3 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/mod/SmaliMod.java
@@ -30,7 +30,7 @@
 import java.nio.charset.StandardCharsets;
 
 public class SmaliMod {
-    public static boolean assembleSmaliFile(File smaliFile,DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
+    public static boolean assembleSmaliFile(File smaliFile, DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
                                             boolean printTokens) throws IOException, RecognitionException {
 
         CommonTokenStream tokens;
diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
index 9f2499e34f..7dcf914fda 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/AndrolibResources.java
@@ -66,7 +66,7 @@ public ResPackage loadMainPkg(ResTable resTable, ExtFile apkFile)
 
         switch (pkgs.length) {
             case 0:
-                pkg = null;
+                pkg = new ResPackage(resTable, 0, null);
                 break;
             case 1:
                 pkg = pkgs[0];
@@ -80,10 +80,6 @@ public ResPackage loadMainPkg(ResTable resTable, ExtFile apkFile)
                 break;
         }
 
-        if (pkg == null) {
-            throw new AndrolibException("arsc files with zero packages or no arsc file found.");
-        }
-
         resTable.addPackage(pkg, true);
         return pkg;
     }
@@ -168,9 +164,11 @@ public void adjustPackageManifest(ResTable resTable, String filePath)
         resTable.setPackageId(resPackage.getId());
         resTable.setPackageOriginal(pkgOriginal);
 
-        // 1) Check if pkgOriginal === mPackageRenamed
-        // 2) Check if pkgOriginal is ignored via IGNORED_PACKAGES
-        if (pkgOriginal.equalsIgnoreCase(mPackageRenamed) || (Arrays.asList(IGNORED_PACKAGES).contains(pkgOriginal))) {
+        // 1) Check if pkgOriginal is null (empty resources.arsc)
+        // 2) Check if pkgOriginal === mPackageRenamed
+        // 3) Check if pkgOriginal is ignored via IGNORED_PACKAGES
+        if (pkgOriginal == null || pkgOriginal.equalsIgnoreCase(mPackageRenamed)
+                || (Arrays.asList(IGNORED_PACKAGES).contains(pkgOriginal))) {
             LOGGER.info("Regular manifest package...");
         } else {
             LOGGER.info("Renamed manifest package found! Replacing " + mPackageRenamed + " with " + pkgOriginal);
@@ -708,7 +706,7 @@ public Duo<ResFileDecoder, AXmlResourceParser> getManifestFileDecoder(boolean wi
         if (withResources) {
             axmlParser.setAttrDecoder(new ResAttrDecoder());
         }
-        decoders.setDecoder("xml", new XmlPullStreamDecoder(axmlParser,getResXmlSerializer()));
+        decoders.setDecoder("xml", new XmlPullStreamDecoder(axmlParser, getResXmlSerializer()));
 
         return new Duo<>(new ResFileDecoder(decoders), axmlParser);
     }
@@ -772,7 +770,7 @@ private void generatePublicXml(ResPackage pkg, Directory out,
         }
     }
 
-    private ResPackage[] getResPackagesFromApk(ExtFile apkFile,ResTable resTable, boolean keepBroken)
+    private ResPackage[] getResPackagesFromApk(ExtFile apkFile, ResTable resTable, boolean keepBroken)
             throws AndrolibException {
         try {
             Directory dir = apkFile.getDirectory();