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winamp/Src/Elevator/Elevator.cpp

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// Elevator.cpp : Implementation of WinMain
#include "stdafx.h"
#include "resource1.h"
#include "FileTypeRegistrar.h"
#include "ElevatorFactory.h"
#include <sddl.h>
#include <strsafe.h>
HRESULT RegisterServer(HINSTANCE hInstance);
HRESULT UnregisterServer(HINSTANCE hInstance);
DWORD g_allLocks = 0;
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
if (lpCmdLine == NULL || !*lpCmdLine)
{
MSGBOXPARAMSW msgbx = {sizeof(MSGBOXPARAMS),0};
msgbx.lpszText = L"Winamp Elevator\nCopyright © 2008-2014 Winamp SA";
msgbx.lpszCaption = L"About...";
msgbx.lpszIcon = MAKEINTRESOURCEW(IDI_ICON1);
msgbx.hInstance = GetModuleHandle(0);
msgbx.dwStyle = MB_USERICON;
MessageBoxIndirectW(&msgbx);
return 0;
}
if ( lpCmdLine != NULL && ( _strcmpi( lpCmdLine, "/RegServer" ) == 0
|| _strcmpi( lpCmdLine, "-RegServer" ) == 0 )) {
RegisterServer(hInstance);
return 0;
}
if ( lpCmdLine != NULL && ( _strcmpi( lpCmdLine, "/UnregServer" ) == 0
|| _strcmpi( lpCmdLine, "-UnregServer" ) == 0 )) {
UnregisterServer(hInstance);
return 0;
}
CoInitialize(NULL);
if(lpCmdLine && (strstr(lpCmdLine, "/Embedding") || strstr(lpCmdLine, "-Embedding")))
{
ElevatorFactory cf;
DWORD regID = 0;
CoRegisterClassObject(CLSID_WFileTypeRegistrar,(IClassFactory*)&cf, CLSCTX_LOCAL_SERVER, REGCLS_MULTIPLEUSE, &regID);
MSG ms;
while(GetMessage(&ms, 0, 0, 0))
{
TranslateMessage(&ms);
DispatchMessage(&ms);
}
CoRevokeClassObject(regID);
}
CoUninitialize();
return 0;
}
extern FileTypeRegistrar registrar;
void Lock()
{
++g_allLocks;
}
void UnLock()
{
--g_allLocks;
if(g_allLocks == 0 )//&& registrar.refCount == 0/* benski> a hack, for now */)
{
PostQuitMessage(0);
}
}
static BOOL GetAccessPermissionsForLUAServer(SECURITY_DESCRIPTOR **ppSD)
{
// Local call permissions to IU, SY
LPWSTR lpszSDDL = L"O:BAG:BAD:(A;;0x3;;;IU)(A;;0x3;;;SY)";
SECURITY_DESCRIPTOR *pSD;
*ppSD = NULL;
if (ConvertStringSecurityDescriptorToSecurityDescriptorW(lpszSDDL, SDDL_REVISION_1, (PSECURITY_DESCRIPTOR *)&pSD, NULL))
{
*ppSD = pSD;
return TRUE;
}
return FALSE;
}
// hKey is the HKCR\AppID\{GUID} key
static BOOL SetAccessPermissions(HKEY hkey, PSECURITY_DESCRIPTOR pSD)
{
BOOL bResult = FALSE;
DWORD dwLen = GetSecurityDescriptorLength(pSD);
LONG lResult;
lResult = RegSetValueExA(hkey,
"AccessPermission",
0,
REG_BINARY,
(BYTE*)pSD,
dwLen);
if (lResult != ERROR_SUCCESS) goto done;
bResult = TRUE;
done:
return bResult;
}
static BOOL GetLaunchActPermissionsWithIL (SECURITY_DESCRIPTOR **ppSD)
{
// Allow World Local Launch/Activation permissions. Label the SD for LOW IL Execute UP
LPWSTR lpszSDDL = L"O:BAG:BAD:(A;;0xb;;;WD)S:(ML;;NX;;;LW)";
SECURITY_DESCRIPTOR *pSD;
if (ConvertStringSecurityDescriptorToSecurityDescriptorW(lpszSDDL, SDDL_REVISION_1, (PSECURITY_DESCRIPTOR *)&pSD, NULL))
{
*ppSD = pSD;
return TRUE;
}
return FALSE;
}
static BOOL SetLaunchActPermissions(HKEY hkey, PSECURITY_DESCRIPTOR pSD)
{
BOOL bResult = FALSE;
DWORD dwLen = GetSecurityDescriptorLength(pSD);
LONG lResult;
lResult = RegSetValueExA(hkey,
"LaunchPermission",
0,
REG_BINARY,
(BYTE*)pSD,
dwLen);
if (lResult != ERROR_SUCCESS) goto done;
bResult = TRUE;
done:
return bResult;
};
static HRESULT UnregisterComponent(const CLSID &clsid, LPCWSTR pszVersionIndProgId, LPCWSTR pszProgId);
static HRESULT RegisterComponent(HMODULE hModule, const CLSID &clsid, LPCWSTR pszFriendlyName, LPCWSTR pszVersionIndProgId, LPCWSTR pszProgId);
static const WCHAR szComponentFriendlyName[] = L"Winamp Elevator";
static const WCHAR szVersionIndependentProgId[] = L"Elevator.WFileTypeRegistrar2";
static const WCHAR szProgId[] = L"Elevator.WFileTypeRegistrar2.1";
HRESULT RegisterServer(HINSTANCE hInstance)
{
HRESULT hr(S_OK);
hr = RegisterComponent(hInstance, CLSID_WFileTypeRegistrar, szComponentFriendlyName, szVersionIndependentProgId, szProgId);
return hr;
}
HRESULT UnregisterServer(HINSTANCE hInstance)
{
HRESULT hr(S_OK);
hr = UnregisterComponent(CLSID_WFileTypeRegistrar, szVersionIndependentProgId, szProgId);
return hr;
}
static BOOL WriteRegKey(HKEY hKeyParent, LPCWSTR pszKey, LPCWSTR pszValue, HKEY *phKey = NULL)
{
HKEY hKey;
LONG result;
result = RegCreateKeyExW(hKeyParent, pszKey, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
if (ERROR_SUCCESS != result || !hKey) return FALSE;
if (pszValue)
{
result = RegSetValueExW(hKey, NULL, 0, REG_SZ, (BYTE*)pszValue, (DWORD)(sizeof(wchar_t)*(1 + lstrlenW(pszValue))));
}
if (!phKey) RegCloseKey(hKey);
else *phKey = hKey;
return (ERROR_SUCCESS == result);
}
static BOOL WriteRegValue(HKEY hKeyParent, LPCWSTR pszKey, LPCWSTR pszEntry, LPCWSTR pszValue)
{
HKEY hKey;
LONG result;
result = RegOpenKeyExW(hKeyParent, pszKey, 0, KEY_SET_VALUE, &hKey);
if (ERROR_SUCCESS != result || !hKey) return FALSE;
if (pszValue)
{
result = RegSetValueEx(hKey, pszEntry, 0, REG_SZ, (BYTE*)pszValue, (DWORD)(sizeof(wchar_t)*(1 + lstrlenW(pszValue))));
}
RegCloseKey(hKey);
return (ERROR_SUCCESS == result);
}
static BOOL WriteRegValue(HKEY hKeyParent, LPCWSTR pszKey, LPCWSTR pszEntry, DWORD pszValue)
{
HKEY hKey;
LONG result;
result = RegOpenKeyExW(hKeyParent, pszKey, 0, KEY_SET_VALUE, &hKey);
if (ERROR_SUCCESS != result || !hKey) return FALSE;
if (pszValue)
{
result = RegSetValueEx(hKey, pszEntry, 0, REG_DWORD, (BYTE*)&pszValue, sizeof(DWORD));
}
RegCloseKey(hKey);
return (ERROR_SUCCESS == result);
}
static LONG DeleteRegKey(HKEY hKeyParent, LPCWSTR pszKey)
{
HKEY hKey;
LONG result;
FILETIME time = {0};
WCHAR szBuffer[512] = {0};
DWORD dwSize = sizeof(szBuffer)/sizeof(WCHAR);
result = RegOpenKeyExW(hKeyParent, pszKey, 0, KEY_SET_VALUE | KEY_ENUMERATE_SUB_KEYS , &hKey);
if (ERROR_SUCCESS != result) return result;
while (ERROR_SUCCESS == RegEnumKeyExW(hKey, 0, szBuffer, &dwSize, NULL, NULL, NULL, &time))
{
if (ERROR_SUCCESS != (result = DeleteRegKey(hKey, szBuffer)))
{
RegCloseKey(hKey);
return result;
}
dwSize = sizeof(szBuffer)/sizeof(WCHAR);
}
RegCloseKey(hKey);
return RegDeleteKeyW(hKeyParent, pszKey);
}
HRESULT RegisterComponent(HMODULE hModule, const CLSID &clsid, LPCWSTR pszFriendlyName, LPCWSTR pszVersionIndProgId, LPCWSTR pszProgId)
{
SECURITY_DESCRIPTOR *sd;
HKEY hKey, hKey2, hKey3;
BOOL br;
WCHAR szBuffer[MAX_PATH] = {0}, szCLSID[64] = {0};
if (!StringFromGUID2(clsid, szCLSID, sizeof(szCLSID)/sizeof(WCHAR))) return E_OUTOFMEMORY;
StringCchPrintfW(szBuffer, sizeof(szBuffer)/sizeof(WCHAR), L"SOFTWARE\\Classes\\CLSID\\%s", szCLSID);
if (!WriteRegKey(HKEY_LOCAL_MACHINE, szBuffer, pszFriendlyName, &hKey)) return S_FALSE;
if (!GetModuleFileNameW(hModule, szBuffer, sizeof(szBuffer)/sizeof(WCHAR))) return S_FALSE;
RegCreateKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Classes\\AppID\\{3B29AB5C-52CB-4a36-9314-E3FEE0BA7468}", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey3, NULL);
if (GetAccessPermissionsForLUAServer(&sd))
SetAccessPermissions(hKey3, sd);
if (GetLaunchActPermissionsWithIL(&sd))
SetLaunchActPermissions(hKey3, sd);
WriteRegValue(hKey3, NULL, NULL, szBuffer);
RegCloseKey(hKey3);
RegCreateKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Classes\\AppID\\elevator.exe", 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey3, NULL);
WriteRegValue(hKey3, NULL, L"AppID", L"{3B29AB5C-52CB-4a36-9314-E3FEE0BA7468}");
RegCloseKey(hKey3);
wchar_t localizedString[MAX_PATH+15] = {0};
StringCbPrintf(localizedString, sizeof(localizedString), L"@%s,-%u", szBuffer, IDS_WINAMP);
br = (WriteRegKey(hKey, L"LocalServer32" , szBuffer, &hKey2) &&
WriteRegValue(hKey2, NULL, L"ThreadingModel", L"Both") &&
WriteRegKey(hKey, L"ProgID", pszProgId) &&
WriteRegKey(hKey, L"VersionIndependentProgID", pszVersionIndProgId)
&& WriteRegValue(hKey, NULL, L"LocalizedString", localizedString)
&& WriteRegValue(hKey, NULL, L"AppId", L"{3B29AB5C-52CB-4a36-9314-E3FEE0BA7468}")
&& WriteRegKey(hKey, L"Elevation", 0)
//&& WriteRegValue(hKey, L"Elevation", L"IconReference",
&& WriteRegValue(hKey, L"Elevation", L"Enabled", 1)
);
RegCloseKey(hKey);
if (hKey2) RegCloseKey(hKey2);
if (!br) return S_FALSE;
if (!WriteRegKey(HKEY_CLASSES_ROOT, pszVersionIndProgId, pszFriendlyName, &hKey)) return S_FALSE;
br = (WriteRegKey(hKey, L"CLSID", szCLSID) &&
WriteRegKey(hKey, L"CurVer", pszProgId));
RegCloseKey(hKey);
if (!br) return S_FALSE;
if (!WriteRegKey(HKEY_CLASSES_ROOT, pszProgId, pszFriendlyName, &hKey)) return S_FALSE;
br = WriteRegKey(hKey, L"CLSID", szCLSID);
RegCloseKey(hKey);
if (!br) return S_FALSE;
return S_OK;
}
static HRESULT UnregisterComponent(const CLSID &clsid, LPCWSTR pszVersionIndProgId, LPCWSTR pszProgId)
{
LONG result;
WCHAR szBuffer[MAX_PATH] = {0}, szCLSID[64] = {0};
if (!StringFromGUID2(clsid, szCLSID, sizeof(szCLSID)/sizeof(WCHAR))) return E_OUTOFMEMORY;
StringCchPrintfW(szBuffer, sizeof(szBuffer)/sizeof(WCHAR), L"CLSID\\%s", szCLSID);
result = DeleteRegKey(HKEY_CLASSES_ROOT, szBuffer);
if (ERROR_SUCCESS != result && ERROR_FILE_NOT_FOUND != result) return S_FALSE;
result = DeleteRegKey(HKEY_CLASSES_ROOT, pszVersionIndProgId);
if (ERROR_SUCCESS != result && ERROR_FILE_NOT_FOUND != result) return S_FALSE;
result = DeleteRegKey(HKEY_CLASSES_ROOT, pszProgId);
if (ERROR_SUCCESS != result && ERROR_FILE_NOT_FOUND != result) return S_FALSE;
return S_OK;
}
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