prevent crash if signature required for anonymous logon isn't found

1 files changed, 16 insertions, 5 deletions

diff --git a/main.cpp b/main.cpp
index 656d4ca..45662dd 100644
--- a/main.cpp
+++ b/main.cpp
@@ -579,15 +579,21 @@ bool CApplication::InitSteam()
 

 #ifdef _WIN32

         void* pppUsePICS = steamclientScanner.FindSignature("\x00\x00\x00\x00\x83\x78\x34\x00\x75\x00\xc6\x81\x74\x0c\x00\x00\x00\x5d\xc2\x04\x00", "????xxxxx?xxxxxxxxxxx");

-        g_pUsePICS = **(void***)pppUsePICS;

+        if(pppUsePICS)

+                g_pUsePICS = **(void***)pppUsePICS;

 #else

         unsigned char* pSig = (unsigned char*)steamclientScanner.FindSignature("\x55\x89\xE5\xE8\x00\x00\x00\x00\x81\xC1\x00\x00\x00\x00\x8B\x45\x08\x80\x7D\x0C\x00", "xxxx????xx????xxxxxxx");

-        int uOffset = *(int*)(pSig + 10);

-        int uOffset2 = *(int*)(pSig + 34);

+        if(pSig)

+        {

+                int uOffset = *(int*)(pSig + 10);

+                int uOffset2 = *(int*)(pSig + 34);

 

-        void* ppUsePICS = pSig + 8 + uOffset + uOffset2;

-        g_pUsePICS = *(void**)ppUsePICS;

+                void* ppUsePICS = pSig + 8 + uOffset + uOffset2;

+                g_pUsePICS = *(void**)ppUsePICS;

+        }

 #endif

+        if(!g_pUsePICS)

+                Msg("Unable to find function signature required for anonymous logon. Anonymous logon is disabled\n");

 

         const char* cszDir = commandLine.ParmValue("-dir");

         if(cszDir)

@@ -867,6 +873,11 @@ bool CApplication::LogOn()
         const char* cszUsername = commandLine.ParmValue("-username");

         if(!cszUsername)

         {

+                if (!g_pUsePICS)

+                {

+                        Error("Anonymous logon is disabled\n");

+                        return false;

+                }

 #ifdef _WIN32

                 void (__thiscall* pSetValue)(void* pThis, const char* cszValue) = (void (__thiscall *)(void *,const char *))  (*(void***)g_pUsePICS)[12];

 #else