From a01f509ec295fbcef19db4901457d171bb2ec564 Mon Sep 17 00:00:00 2001
From: xor <xabofdez@gmail.com>
Date: Mon, 7 Feb 2022 00:44:08 +0100
Subject: [PATCH] Actually find valid NROs

---
 Makefile                          |  4 +--
 uLaunch/source/cfg/cfg_Config.cpp | 53 +++++++++++++++++++++----------
 2 files changed, 38 insertions(+), 19 deletions(-)

diff --git a/Makefile b/Makefile
index db7a335d..18e9aa46 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 
 export UL_MAJOR	:=	0
-export UL_MINOR	:=	3
-export UL_MICRO :=	1
+export UL_MINOR	:=	4
+export UL_MICRO :=	0
 export UL_VERSION	:=	$(UL_MAJOR).$(UL_MINOR).$(UL_MICRO)
 
 export UL_DEFS	:=	-DUL_MAJOR=$(UL_MAJOR) -DUL_MINOR=$(UL_MINOR) -DUL_MICRO=$(UL_MICRO) -DUL_VERSION=\"$(UL_VERSION)\"
diff --git a/uLaunch/source/cfg/cfg_Config.cpp b/uLaunch/source/cfg/cfg_Config.cpp
index 850fc279..6ac90644 100644
--- a/uLaunch/source/cfg/cfg_Config.cpp
+++ b/uLaunch/source/cfg/cfg_Config.cpp
@@ -12,19 +12,23 @@ namespace cfg {
             const auto cache_nro_icon_path = GetNroCacheIconPath(nro_path);
             auto f = fopen(nro_path.c_str(), "rb");
             if(f) {
-                fseek(f, sizeof(NroStart), SEEK_SET);
-                NroHeader nro_header = {};
-                if(fread(&nro_header, sizeof(nro_header), 1, f) == 1) {
-                    fseek(f, nro_header.size, SEEK_SET);
-                    NroAssetHeader asset_header = {};
-                    if(fread(&asset_header, sizeof(asset_header), 1, f) == 1) {
-                        if(asset_header.magic == NROASSETHEADER_MAGIC) {
-                            if((asset_header.icon.offset > 0) && (asset_header.icon.size > 0)) {
-                                auto icon_buf = new u8[asset_header.icon.size]();
-                                fseek(f, nro_header.size + asset_header.icon.offset, SEEK_SET);
-                                fread(icon_buf, asset_header.icon.size, 1, f);
-                                fs::WriteFile(cache_nro_icon_path, icon_buf, asset_header.icon.size, true);
-                                delete[] icon_buf;
+                if(fseek(f, sizeof(NroStart), SEEK_SET) == 0) {
+                    NroHeader header = {};
+                    if(fread(&header, sizeof(header), 1, f) == 1) {
+                        if(fseek(f, header.size, SEEK_SET) == 0) {
+                            NroAssetHeader asset_header = {};
+                            if(fread(&asset_header, sizeof(asset_header), 1, f) == 1) {
+                                if(asset_header.magic == NROASSETHEADER_MAGIC) {
+                                    if((asset_header.icon.offset > 0) && (asset_header.icon.size > 0)) {
+                                        auto icon_buf = new u8[asset_header.icon.size]();
+                                        if(fseek(f, header.size + asset_header.icon.offset, SEEK_SET) == 0) {
+                                            if(fread(icon_buf, asset_header.icon.size, 1, f) == 1) {
+                                                fs::WriteFile(cache_nro_icon_path, icon_buf, asset_header.icon.size, true);
+                                            }
+                                        }
+                                        delete[] icon_buf;
+                                    }
+                                }
                             }
                         }
                     }
@@ -90,10 +94,25 @@ namespace cfg {
             }
             else {
                 if(util::StringEndsWith(name, ".nro")) {
-                    TitleRecord rec = {};
-                    rec.title_type = TitleType::Homebrew;
-                    strcpy(rec.nro_target.nro_path, path.c_str());
-                    nros.push_back(rec);
+                    auto f = fopen(path.c_str(), "rb");
+                    if(f) {
+                        fseek(f, 0, SEEK_END);
+                        const auto f_size = ftell(f);
+                        rewind(f);
+
+                        if(fseek(f, sizeof(NroStart), SEEK_SET) == 0) {
+                            NroHeader header;
+                            if(fread(&header, sizeof(header), 1, f) == 1) {
+                                if((header.magic == NROHEADER_MAGIC) && (f_size >= header.size)) {
+                                    TitleRecord rec = {};
+                                    rec.title_type = TitleType::Homebrew;
+                                    strcpy(rec.nro_target.nro_path, path.c_str());
+                                    nros.push_back(rec);
+                                }
+                            }
+                        }
+                        fclose(f);
+                    }
                 }
             }
         });