mirror of
https://github.com/dashr9230/SA-MP.git
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113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
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// This is intended to be a wrapper for Obfuscating calls
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// to CryptoAPI. Make sure that LoadLibrary("ADVAPI32.DLL") is
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// somewhere (i.e. access some random reg key), otherwise this
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// will fail.. miserably.
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#pragma once
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#include <windows.h>
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#ifndef ARCTOOL
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/*
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const CHAR* CRYPT_MODULE = "advapi32";
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const CHAR* CRYPT_FN_AcquireContext = "CryptAcquireContextA";
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const CHAR* CRYPT_FN_ReleaseContext = "CryptReleaseContext";
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const CHAR* CRYPT_FN_GenRandom = "CryptGenRandom";
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const CHAR* CRYPT_FN_CreateHash = "CryptCreateHash";
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const CHAR* CRYPT_FN_DestroyHash = "CryptDestroyHash";
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const CHAR* CRYPT_FN_HashData = "CryptHashData";
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const CHAR* CRYPT_FN_DestroyKey = "CryptDestroyKey";
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const CHAR* CRYPT_FN_ImportKey = "CryptImportKey";
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const CHAR* CRYPT_FN_VerifySignature = "CryptVerifySignatureA";
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*/
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const CHAR CRYPT_MODULE[] = "41#4%<fgU";
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const CHAR CRYPT_FN_AcquireContext[] = {0x16,0x27,0x2C,0x25,0x21,0x14,0x36,0x24,
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0x20,0x3C,0x27,0x30,0x16,0x3A,0x3B,0x21,
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0x30,0x2D,0x21,0x14,0x55,0x00,0x00,0x00};
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const CHAR CRYPT_FN_ReleaseContext[] = {0x16,0x27,0x2C,0x25,0x21,0x07,0x30,0x39,
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0x30,0x34,0x26,0x30,0x16,0x3A,0x3B,0x21,
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0x30,0x2D,0x21,0x55,0x00,0x00,0x00,0x00,};
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const CHAR CRYPT_FN_CreateHash[] = {0x16,0x27,0x2C,0x25,0x21,0x16,0x27,0x30,
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0x34,0x21,0x30,0x1D,0x34,0x26,0x3D,0x55};
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const CHAR CRYPT_FN_DestroyHash[] = {0x16,0x27,0x2C,0x25,0x21,0x11,0x30,0x26,
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0x21,0x27,0x3A,0x2C,0x1D,0x34,0x26,0x3D,
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0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
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const CHAR CRYPT_FN_HashData[] = {0x16,0x27,0x2C,0x25,0x21,0x1D,0x34,0x26,
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0x3D,0x11,0x34,0x21,0x34,0x55,0x00,0x00};
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const CHAR CRYPT_FN_DestroyKey[] = {0x16,0x27,0x2C,0x25,0x21,0x11,0x30,0x26,
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0x21,0x27,0x3A,0x2C,0x1E,0x30,0x2C,0x55};
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const CHAR CRYPT_FN_ImportKey[] = {0x16,0x27,0x2C,0x25,0x21,0x1C,0x38,0x25,
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0x3A,0x27,0x21,0x1E,0x30,0x2C,0x55,0x00};
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const CHAR CRYPT_FN_VerifySignature[] = {0x16,0x27,0x2C,0x25,0x21,0x03,0x30,0x27,
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0x3C,0x33,0x2C,0x06,0x3C,0x32,0x3B,0x34,
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0x21,0x20,0x27,0x30,0x14,0x55,0x00,0x00};
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#define CRYPT_GET_NAME(a,b) \
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CHAR* a = NULL; \
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{ \
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DWORD dwFnLen = strlen(b); \
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a = new CHAR[dwFnLen]; \
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for(DWORD i=0; i<dwFnLen; i++) \
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##a[i] = (CHAR)(##b[i] ^ 0x55); \
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}
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#ifndef CRYPT_FN_CPP
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#define CRYPT_IMPL_FN(n,r,p) \
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r WINAPI xCryptCall##n##p;
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#else
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// This is for the actual function when in the .CPP
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#define CRYPT_IMPL_FN(n,r,p) \
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DWORD xCryptOffs##n = NULL; \
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__declspec(naked) r WINAPI xCryptCall##n##p \
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{ \
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if (xCryptOffs##n == NULL) { \
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_asm { lea eax, CRYPT_FN_##n }; \
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_asm { push eax }; \
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_asm { call xCryptGetFunction }; \
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_asm { add esp, 4 }; \
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_asm { mov dword ptr xCryptOffs##n, eax }; \
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} \
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_asm { mov eax, dword ptr xCryptOffs##n }; \
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_asm { jmp eax }; \
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}
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#endif
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#ifdef CRYPT_FN_CPP
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FARPROC xCryptGetFunction(CHAR* name, DWORD len)
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{
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CRYPT_GET_NAME(szModName, CRYPT_MODULE);
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CRYPT_GET_NAME(szProcName, name);
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HMODULE hMod = GetModuleHandle(szModName);
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FARPROC fpProc = GetProcAddress(hMod, szProcName);
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return fpProc;
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}
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#endif
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#define CRYPT(n) \
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xCryptCall##n
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CRYPT_IMPL_FN(AcquireContext, BOOL, (HCRYPTPROV* phProv, LPCTSTR pszContainer, LPCTSTR pszProvider, DWORD dwProvType, DWORD dwFlags))
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CRYPT_IMPL_FN(ReleaseContext, BOOL, (HCRYPTPROV hProv, DWORD dwFlags))
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CRYPT_IMPL_FN(CreateHash, BOOL, (HCRYPTPROV hProv, ALG_ID Algid, HCRYPTKEY hKey, DWORD dwFlags, HCRYPTHASH* phHash))
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CRYPT_IMPL_FN(DestroyHash, BOOL, (HCRYPTHASH hHash))
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CRYPT_IMPL_FN(HashData, BOOL, (HCRYPTHASH hHash, BYTE* pbData, DWORD dwDataLen, DWORD dwFlags))
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CRYPT_IMPL_FN(DestroyKey, BOOL, (HCRYPTKEY hKey))
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CRYPT_IMPL_FN(ImportKey, BOOL, (HCRYPTPROV hProv, BYTE* pbData, DWORD dwDataLen, HCRYPTKEY hPubKey, DWORD dwFlags, HCRYPTKEY* phKey))
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CRYPT_IMPL_FN(VerifySignature, BOOL, (HCRYPTHASH hHash, BYTE* pbSignature, DWORD dwSigLen, HCRYPTKEY hPubKey, LPCTSTR sDescription, DWORD dwFlags))
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#else
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#define CRYPT(n) \
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Crypt##n
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#endif
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