83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
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#include "pch.h"
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#include "Utils.h"
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bool Utils::Detour32(char* src, char* dst, const intptr_t len)
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{
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if (len < 5) return false;
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DWORD curProtection;
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VirtualProtect(src, len, PAGE_EXECUTE_READWRITE, &curProtection);
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intptr_t relativeAddress = (intptr_t)(dst - (intptr_t)src) - 5;
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*src = (char)'\xE9';
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*(intptr_t*)((intptr_t)src + 1) = relativeAddress;
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VirtualProtect(src, len, curProtection, &curProtection);
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return true;
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}
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char* Utils::TrampHook32(char* src, char* dst, const intptr_t len)
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{
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// Make sure the length is greater than 5
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if (len < 5) return 0;
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// Create the gateway (len + 5 for the overwritten bytes + the jmp)
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void* gateway = VirtualAlloc(0, len + 5, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
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if (gateway == NULL) return 0;
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// Write the stolen bytes into the gateway
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memcpy(gateway, src, len);
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// Get the gateway to destination addy
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intptr_t gatewayRelativeAddr = ((intptr_t)src - (intptr_t)gateway) - 5;
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// Add the jmp opcode to the end of the gateway
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*(char*)((intptr_t)gateway + len) = 0xE9;
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// Add the address to the jmp
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*(intptr_t*)((intptr_t)gateway + len + 1) = gatewayRelativeAddr;
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// Perform the detour
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Detour32(src, dst, len);
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return (char*)gateway;
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}
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int spotifyVer = -1;
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int Utils::GetSpotifyVersion()
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{
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if (spotifyVer != -1)
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return spotifyVer;
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LPCWSTR lpszFilePath = L"Spotify.exe";
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DWORD dwDummy;
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DWORD dwFVISize = GetFileVersionInfoSize(lpszFilePath, &dwDummy);
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LPBYTE lpVersionInfo = new BYTE[dwFVISize];
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GetFileVersionInfo(lpszFilePath, 0, dwFVISize, lpVersionInfo);
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UINT uLen;
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VS_FIXEDFILEINFO* lpFfi;
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VerQueryValue(lpVersionInfo, _T("\\"), (LPVOID*)&lpFfi, &uLen);
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DWORD dwFileVersionMS = lpFfi->dwFileVersionMS;
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DWORD dwFileVersionLS = lpFfi->dwFileVersionLS;
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delete[] lpVersionInfo;
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DWORD dwLeftMost = HIWORD(dwFileVersionMS);
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DWORD dwSecondLeft = LOWORD(dwFileVersionMS);
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DWORD dwSecondRight = HIWORD(dwFileVersionLS);
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DWORD dwRightMost = LOWORD(dwFileVersionLS);
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return spotifyVer = dwSecondRight;
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}
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std::string Utils::HexString(BYTE* data, int len)
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{
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std::stringstream ss;
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ss << std::hex;
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for (int i(0); i < len; ++i)
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ss << std::setw(2) << std::setfill('0') << (int)data[i];
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return ss.str();
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}
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