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97 lines
2.1 KiB
97 lines
2.1 KiB
5 years ago
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#include <windows.h>
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#include "shader_dll_verify.h"
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static unsigned char *g_pLastInputData = 0;
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static HANDLE g_hDLLInst = 0;
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extern "C"
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{
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void __declspec( dllexport ) _ftol3( char *pData );
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BOOL WINAPI DllMain (HANDLE hInst, ULONG ulInit, LPVOID lpReserved);
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};
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BOOL WINAPI DllMain (HANDLE hInst, ULONG ulInit, LPVOID lpReserved)
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{
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lpReserved = lpReserved;
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ulInit = ulInit;
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g_hDLLInst = hInst;
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return true;
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}
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class CShaderDLLVerification : public IShaderDLLVerification
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{
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public:
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virtual CRC32_t Function1( unsigned char *pData );
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virtual void Function2( int a, int b, int c );
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virtual void Function3( int a, int b, int c );
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virtual void Function4( int a, int b, int c );
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virtual CRC32_t Function5();
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};
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static CShaderDLLVerification g_Blah;
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// The main exported function.. return a pointer to g_Blah.
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void __declspec( dllexport ) _ftol3( char *pData )
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{
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pData += SHADER_DLL_VERIFY_DATA_PTR_OFFSET;
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char *pToFillIn = (char*)&g_Blah;
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memcpy( pData, &pToFillIn, 4 );
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}
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CRC32_t CShaderDLLVerification::Function1( unsigned char *pData )
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{
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pData += SHADER_DLL_VERIFY_DATA_PTR_OFFSET;
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g_pLastInputData = (unsigned char*)pData;
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void *pVerifyPtr1 = &g_Blah;
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CRC32_t testCRC;
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CRC32_Init( &testCRC );
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CRC32_ProcessBuffer( &testCRC, pData, SHADER_DLL_VERIFY_DATA_LEN1 );
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CRC32_ProcessBuffer( &testCRC, &g_hDLLInst, 4 );
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CRC32_ProcessBuffer( &testCRC, &pVerifyPtr1, 4 );
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CRC32_Final( &testCRC );
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return testCRC;
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}
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void CShaderDLLVerification::Function2( int a, int b, int c )
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{
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a=b=c;
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MD5Context_t md5Context;
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MD5Init( &md5Context );
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MD5Update( &md5Context, g_pLastInputData + SHADER_DLL_VERIFY_DATA_PTR_OFFSET, SHADER_DLL_VERIFY_DATA_LEN1 - SHADER_DLL_VERIFY_DATA_PTR_OFFSET );
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MD5Final( g_pLastInputData, &md5Context );
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}
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void CShaderDLLVerification::Function3( int a, int b, int c )
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{
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a=b=c;
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}
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void CShaderDLLVerification::Function4( int a, int b, int c )
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{
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a=b=c;
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}
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CRC32_t CShaderDLLVerification::Function5()
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{
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return 32423;
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}
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