add developer mode into blockthespot

Author: mrpond

config.ini

@@ -1,3 +1,4 @@
 [Config]
 ;Log system
-Log = 0
+Log = 0
+Developer = 1

src/BlockTheSpot.vcxproj

@@ -48,6 +48,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <TargetName>dpapi</TargetName>
     <OutDir>$(ProjectDir)..\</OutDir>
+    <LinkIncremental>false</LinkIncremental>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
@@ -56,6 +57,8 @@
       <LanguageStandard>stdcpp20</LanguageStandard>
       <AdditionalIncludeDirectories>./cef_binary_109.1.13+g18f6895+chromium-109.0.5414.87_windows32_minimal</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <ExceptionHandling>Sync</ExceptionHandling>
+      <RuntimeTypeInfo>false</RuntimeTypeInfo>
     </ClCompile>
     <Link>
       <ModuleDefinitionFile>dpapi.def</ModuleDefinitionFile>
@@ -76,6 +79,7 @@
       <LanguageStandard>stdcpp20</LanguageStandard>
       <AdditionalIncludeDirectories>
       </AdditionalIncludeDirectories>
+      <RuntimeTypeInfo>false</RuntimeTypeInfo>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>

src/Logger.h

@@ -13,31 +13,32 @@ class Logger {
 	}
 
 	std::wofstream log_wstream;
-	const bool read (std::wstring_view app, std::wstring_view key,const int def_value = 0) {
-		if (1 == GetPrivateProfileInt (app.data (), key.data (), def_value, L"./config.ini")) {
+
+public:
+
+	const bool read(std::wstring_view app, std::wstring_view key, const int def_value = 0) {
+		if (1 == GetPrivateProfileInt(app.data(), key.data(), def_value, L"./config.ini")) {
 			return true;
 		}
 		return false;
 	}
 
-
-public:
 	Logger () {
-		if (read (L"Config", L"Log")) {
+		if (true == read (L"Config", L"Log")) {
 			log_wstream.open (L"blockthespot_log.txt", std::ios::out | std::ios::app);
 			//m_log << "BlockTheSpot - Build date: " << __TIMESTAMP__ << std::endl;
 		}
 	}
 
 	~Logger () {
-		if (log_wstream.is_open()) {
+		if (true == log_wstream.is_open()) {
 			log_wstream.flush ();
 			log_wstream.close ();
 		}
 	}
 
 	void Log (std::wstring_view log) {
-		if (log_wstream.is_open ()) {
+		if (true == log_wstream.is_open ()) {
 			std::wstringstream message;
 			const auto& time = current_datetime();
 			message << L"LOG | " << std::put_time(&time, L"%d-%b-%Y %H:%M:%S") << L" - " << log;

src/Modify.cpp

@@ -5,7 +5,6 @@
 #ifndef NDEBUG
 #include <include/capi/cef_urlrequest_capi.h>
 #endif
-
 /*
 * 
 * Black banner still show even libcef hooked.
@@ -29,7 +28,7 @@ static _cef_urlrequest_create cef_urlrequest_create_orig;
 static _cef_string_userfree_utf16_free cef_string_userfree_utf16_free_orig;
 
 static constexpr auto block_list = { L"/ads/", L"/ad-logic/", L"/gabo-receiver-service/" };
-
+//static constexpr char search_str[] = {0x61,0x70,0x70,0x2D,0x64,0x65,0x76,0x65,0x6C,0x6F,0x70,0x65,0x72,0x09,0x01,0x30,0x78};
 
 DWORD WINAPI get_url(DWORD pRequest)
 {
@@ -86,6 +85,52 @@ void* cef_urlrequest_create_hook(void* request, void* client, void* request_cont
 	return cef_urlrequest_create_orig (request, client, request_context);
 }
 
+
+// https://www.unknowncheats.me/forum/1064672-post23.html
+bool DataCompare(BYTE* pData, BYTE* bSig, const char* szMask)
+{
+	for (; *szMask; ++szMask, ++pData, ++bSig)
+	{
+		if (*szMask == 'x' && *pData != *bSig)
+			return false;
+	}
+	return (*szMask) == NULL;
+}
+
+BYTE* FindPattern(BYTE* dwAddress, const DWORD dwSize, BYTE* pbSig, const char* szMask)
+{
+	DWORD length = strlen(szMask);
+	for (DWORD i = NULL; i < dwSize - length; i++)
+	{
+		__try
+		{
+			if (DataCompare(dwAddress + i, pbSig, szMask))
+				return dwAddress + i;
+		}
+		__except (EXCEPTION_EXECUTE_HANDLER) {
+			return nullptr;
+		}
+	}
+	return 0;
+}
+
+int FindPattern2(BYTE* dwAddress, const DWORD dwSize, BYTE* pbSig, const char* szMask)
+{
+	DWORD length = strlen(szMask);
+	for (DWORD i = NULL; i < dwSize - length; i++)
+	{
+		__try
+		{
+			if (DataCompare(dwAddress + i, pbSig, szMask))
+				return i;
+		}
+		__except (EXCEPTION_EXECUTE_HANDLER) {
+			return 0;
+		}
+	}
+	return 0;
+}
+
 DWORD WINAPI KillBanner (LPVOID)
 {
 	constexpr auto libcef_str{ L"libcef.dll" };
@@ -104,6 +149,42 @@ DWORD WINAPI KillBanner (LPVOID)
 			result ? g_Logger.Log(L"main process - patch success!") : g_Logger.Log(L"main process - patch failed!");
 		}
 	}
-	
 	return 0;
 }
+
+DWORD WINAPI Developer(LPVOID)
+{
+	if (true == g_Logger.read(L"Config", L"Developer")) {
+		auto appdata = std::getenv("APPDATA");
+		std::filesystem::path file{ appdata };
+		file = file.parent_path();
+		file /= "Local\\Spotify\\offline.bnk";
+		std::fstream offline_bnk;
+		offline_bnk.open(file, std::ios::in | std::ios::out | std::ios::binary);
+		if (true == offline_bnk.is_open()) {
+			const auto length = std::filesystem::file_size(file);
+			if (length > 0)
+			{
+				char* temp_buffer = new char[length];
+				offline_bnk.rdbuf()->sgetn(temp_buffer, length);
+				auto developer = FindPattern2((uint8_t*)temp_buffer, length, 
+					(BYTE*)"\x61\x70\x70\x2D\x64\x65\x76\x65\x6C\x6F\x70\x65\x72\x09\x01\x30\x78", 
+					"xxxxxxxxxxxxxxxxx");
+				//app-developer \x09 \x01 \x30 \x78 -> app-developer(\t\x01)00x
+				if (developer) {
+					offline_bnk.seekp(developer + 15);
+					offline_bnk << char(0x32);//00x -> 02x
+					g_Logger.Log(L"offline.bnk modified!");
+				}
+				else {
+					g_Logger.Log(L"offline.bnk not modified!");
+				}
+				delete[] temp_buffer;
+			}
+		}
+		else {
+			g_Logger.Log(L"offline.bnk not exists/access denied!");
+		}
+	}
+	return 0;
+}

src/Modify.h

@@ -1,4 +1,5 @@
 #pragma once
 #include "stdafx.h"
 
-DWORD WINAPI KillBanner (LPVOID);
+DWORD WINAPI KillBanner (LPVOID);
+DWORD WINAPI Developer (LPVOID);

src/dllmain.cpp

@@ -13,6 +13,8 @@ BOOL APIENTRY DllMain (HMODULE hModule,
 		{
 		case DLL_PROCESS_ATTACH:
 			if (std::wstring_view::npos == procname.find (L"--type=")) {
+				// Modify offline.bnk
+				CreateThread (NULL, NULL, Developer, NULL, 0, NULL);
 				// block ads request - main process
 				CreateThread (NULL, NULL, KillBanner, NULL, 0, NULL);
 			}

src/stdafx.h

@@ -9,12 +9,12 @@
 #define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
 // Windows Header Files:
 #include <windows.h>
+#include <shlobj.h>
 #include <Psapi.h>
-
+#include <filesystem>
 
 // TODO: reference additional headers your program requires here
 #include <fstream>
-#include <iomanip>
 #include <sstream>
 #include <string>
 #include "mhook-lib/mhook.h"