From ae096413002f8267de4804fa84d6dea8859e90dc Mon Sep 17 00:00:00 2001
From: "Dr.Abc" <me@drabc.net>
Date: Thu, 19 Dec 2024 19:08:38 +0800
Subject: [PATCH] ClExtrasInfo

---
 src/Header/Var/local.h        |  1 +
 src/Source/HUD/CCustomHud.cpp | 30 ++++++++++++++++++++++++++++++
 src/Source/exportfuncs.cpp    |  2 ++
 3 files changed, 33 insertions(+)

diff --git a/src/Header/Var/local.h b/src/Header/Var/local.h
index e26dcabd..c885955c 100644
--- a/src/Header/Var/local.h
+++ b/src/Header/Var/local.h
@@ -68,6 +68,7 @@ using cl_refHookfunc_t = struct{
 	void(__fastcall* CBasePanel_PaintBackground)(void* pthis, int dummy);
 
 	void(__fastcall* CGameUI_Start)(void* pthis, int dummy, void* engfuncs, int idoncare, void* ibasesystem);
+	byte* (__fastcall* Crypto_GenerateKey)(void* pthis, int dummy, size_t param1, bool param2);
 
 	void		(*pfnPlaybackEvent)			(int flags, const struct edict_s* pInvoker, unsigned short eventindex, float delay, float* origin, float* angles, float fparam1, float fparam2, int iparam1, int iparam2, int bparam1, int bparam2);
 	//VGUI2
diff --git a/src/Source/HUD/CCustomHud.cpp b/src/Source/HUD/CCustomHud.cpp
index ea6402cb..6a36f6ab 100644
--- a/src/Source/HUD/CCustomHud.cpp
+++ b/src/Source/HUD/CCustomHud.cpp
@@ -71,6 +71,7 @@ static pfnUserMsgHook m_pfnTextMsg;
 static pfnUserMsgHook m_pfnMetaHook;
 static pfnUserMsgHook m_pfnDamage;
 static pfnUserMsgHook m_pfnBattery;
+static pfnUserMsgHook m_pfnClExtrasInfo;
 #pragma endregion
 
 #pragma region UserMsg Hooks
@@ -432,6 +433,34 @@ static int __MsgFunc_TextMsg(const char* pszName, int iSize, void* pbuf) {
 
 	return m_pfnTextMsg(pszName, iSize, pbuf);
 }
+static int __MsgFunc_ClExtrasInfo(const char* pszName, int iSize, void* pbuf) {
+	//Why Encrypt it? is it aes?
+	//Funny Encrypt here, plain text length 33, sent length 105
+	//x3 Network traffic, lets fuck more server operator
+	BEGIN_READ(pbuf, iSize);
+	int plainDataLength = READ_LONG();
+	int ivLength = READ_LONG();
+	std::vector<byte> iv{};
+	for (int i = 0; i < ivLength; i++) {
+		iv.push_back(READ_BYTE());
+	}
+	int encryptLength = READ_LONG();
+	std::vector<byte> encrypt{};
+	for (int i = 0; i < encryptLength; i++) {
+		encrypt.push_back(READ_BYTE());
+	}
+	int enctryptDigestLength = READ_LONG();
+	std::vector<byte> digest{};
+	for (int i = 0; i < enctryptDigestLength; i++) {
+		digest.push_back(READ_BYTE());
+	}
+	extern PVOID g_dwClientBase;
+	//Funny Stack Object;
+	auto pCryptoObj = reinterpret_cast<char*>(g_dwClientBase) + 0xBE0;
+	byte* key = gHookFuncs.Crypto_GenerateKey(pCryptoObj, 0, 1, false);
+
+	return m_pfnClExtrasInfo(pszName, iSize, pbuf);
+}
 static int __MsgFunc_MetaHook(const char* pszName, int iSize, void* pbuf) {
 	BEGIN_READ(pbuf, iSize);
 	int type = READ_BYTE();
@@ -612,6 +641,7 @@ void CCustomHud::HUD_Init(void){
 	m_pfnFlashlight = HOOK_MESSAGE(Flashlight);
 	m_pfnTextMsg = HOOK_MESSAGE(TextMsg);
 	m_pfnMetaHook = HOOK_MESSAGE(MetaHook);
+	m_pfnClExtrasInfo = HOOK_MESSAGE(ClExtrasInfo);
 	if(!m_pfnMetaHook)
 		gEngfuncs.pfnHookUserMsg("MetaHook", __MsgFunc_MetaHook);
 
diff --git a/src/Source/exportfuncs.cpp b/src/Source/exportfuncs.cpp
index 94c86a2c..90f3e7a6 100644
--- a/src/Source/exportfuncs.cpp
+++ b/src/Source/exportfuncs.cpp
@@ -242,6 +242,8 @@ void FillAddress() {
 		Fill_Sig(Client_SoundEngine_PlayFMODSound_SIG, g_dwClientBase, g_dwClientSize, CClient_SoundEngine_PlayFMODSound);
 #define V_PunchAxis_SIG "\x8B\x44\x24\x04\xF3\x0F\x10\x44\x24\x08\xF3\x0F\x11\x04\x85\x2A\x2A\x2A\x2A\xC3\xCC"
 		Fill_Sig(V_PunchAxis_SIG, g_dwClientBase, g_dwClientSize, V_PunchAxis);
+#define Crypto_GenerateKey_SIG "\x81\xEC\x8C\x08\x00\x00\xA1\x2A\x2A\x2A\x2A\x33\xC4\x89\x84\x24\x88\x08\x00\x00\x53\x8B\x9C\x24\x94"
+		Fill_Sig(Crypto_GenerateKey_SIG, g_dwClientBase, g_dwClientSize, Crypto_GenerateKey);
 		PUCHAR addr;
 		if (1)
 		{