ActiveX控件安全初始化之二:自己动手修改注册表

这里所谓的修改注册表的方法就是使用组件分组管理器(Component Categories Manager)创建一个正确的入口到系统注册表。IE3通过检测注册表绝对一个控件是否是可以安全性初始化和脚本操作的。IE3通过调用 ICatInformation::IsClassOfCategories 方法决定是否控件支持给出的安全性分组。

1。创建了一个叫做AxCSChart.ocx的MFC ActiveX控件。

2。在AxCSChart.cpp中

加入头文件

//.........................
#include "comcat.h"
#include "Objsafe.h"
//.........................

const GUID CDECL CLSID_SafeItem =
  { 0x7AE7497B, 0xCAD8, 0x4E66, { 0xA5,0x8B,0xDD,0xE9,0xBC,0xAF,0x6B,0x61 } };

// 创建组件种类
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription)
{
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;

    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr, 
            NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (FAILED(hr))
        return hr;

    // Make sure the HKCR\Component Categories\{..catid...}
    // key is registered.
    CATEGORYINFO catinfo;
    catinfo.catid = catid;
    catinfo.lcid = 0x0409 ; // english

    // Make sure the provided description is not too long.
    // Only copy the first 127 characters if it is.
    int len = (int)wcslen(catDescription);
    if (len>127)
        len = 127;
    wcsncpy(catinfo.szDescription, catDescription, len);
    // Make sure the description is null terminated.
    catinfo.szDescription[len] = '\0';

    hr = pcr->RegisterCategories(1, &catinfo);
        pcr->Release();

    return hr;
}

// 注册组件种类
HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
{
    // Register your component categories information.
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;
    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr, 
                NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (SUCCEEDED(hr))
    {
       // Register this category as being "implemented" by the class.
       CATID rgcatid[1] ;
       rgcatid[0] = catid;
       hr = pcr->RegisterClassImplCategories(clsid, 1, rgcatid);
    }
    if (pcr != NULL)
        pcr->Release();
    return hr;
}
// 卸载组件种类
HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid)
{
    ICatRegister* pcr = NULL ;
    HRESULT hr = S_OK ;

    hr = CoCreateInstance(CLSID_StdComponentCategoriesMgr, 
            NULL, CLSCTX_INPROC_SERVER, IID_ICatRegister, (void**)&pcr);
    if (SUCCEEDED(hr))
    {
       // Unregister this category as being "implemented" by the class.
       CATID rgcatid[1] ;
       rgcatid[0] = catid;
       hr = pcr->UnRegisterClassImplCategories(clsid, 1, rgcatid);
    }

    if (pcr != NULL)
        pcr->Release();

    return hr;
}

然后在DllRegisterServer和DllUnregisterServer中调用

// DllRegisterServer - 将项添加到系统注册表

STDAPI DllRegisterServer(void)
{
 AFX_MANAGE_STATE(_afxModuleAddrThis);

 if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))
  return ResultFromScode(SELFREG_E_TYPELIB);

 if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))
  return ResultFromScode(SELFREG_E_CLASS);
//.............................................................................
 HRESULT hr;
 // 标记控件初始化安全.
    // 创建初始化安全组件种类
    hr = CreateComponentCategory(CATID_SafeForInitializing, L"Controls safely initializable from persistent data!");
    if (FAILED(hr))
        return hr;
    // 注册初始化安全
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);
    if (FAILED(hr))
        return hr;

    // 标记控件脚本安全
    // 创建脚本安全组件种类 
    hr = CreateComponentCategory(CATID_SafeForScripting, L"Controls safely scriptable!");
    if (FAILED(hr))
        return hr;
    // 注册脚本安全组件种类
    hr = RegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting);
    if (FAILED(hr))
        return hr;
//.............................................................................

 return NOERROR;
}

// DllUnregisterServer - 将项从系统注册表中移除

STDAPI DllUnregisterServer(void)
{
 AFX_MANAGE_STATE(_afxModuleAddrThis);

 if (!AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor))
  return ResultFromScode(SELFREG_E_TYPELIB);

 if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))
  return ResultFromScode(SELFREG_E_CLASS);
//.............................................................................
 HRESULT hr;
 // 删除控件初始化安全入口.
    hr=UnRegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForInitializing);
    if (FAILED(hr))
        return hr;
    // 删除控件脚本安全入口
    hr=UnRegisterCLSIDInCategory(CLSID_SafeItem, CATID_SafeForScripting);
    if (FAILED(hr))
        return hr;
//.............................................................................

 return NOERROR;
}

可参见MSDN

ms-help://MS.MSDNQTR.2003FEB.2052/dnaxctrl/html/msdn_signmark.htm