activex com 组件开发二 安全接口的实现

上篇文章介绍了 一个 控件的创建，但是控件嵌入ie 是不安全的行为 ，ie浏览器老弹出安全提示，这一节实现他的安全接口， 让ie 不弹出提示。

对于MFC写的ActiveX，通过修改注册表的方式来实现控件的安全性，微软说明http://support2.microsoft.com/kb/161873/en-us。下面做个简单的翻译：

1、在项目中创建两个文件  Cathelp.h

 

#include "comcat.h"

// Helper function to create a component category and associated
// description
HRESULT CreateComponentCategory(CATID catid, WCHAR* catDescription);

// Helper function to register a CLSID as belonging to a component
// category
HRESULT RegisterCLSIDInCategory(REFCLSID clsid, CATID catid);

// HRESULT UnRegisterCLSIDInCategory - Remove entries from the registry
HRESULT UnRegisterCLSIDInCategory(REFCLSID clsid, CATID catid);

2 、Cathelp.cpp

#include "stdafx.h"
#include "comcat.h"
#include "strsafe.h"
#include "objsafe.h"

// HRESULT CreateComponentCategory - Used to register ActiveX control as safe
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
size_t len;
// Make sure the provided description is not too long.
// Only copy the first 127 characters if it is.
// The second parameter of StringCchLength is the maximum
// number of characters that may be read into catDescription.
// There must be room for a NULL-terminator. The third parameter
// contains the number of characters excluding the NULL-terminator.
hr = StringCchLength(catDescription, STRSAFE_MAX_CCH, &len);
if (SUCCEEDED(hr))
{
if (len>127)
{
len = 127;
}
}
else
{
// TODO: Write an error handler;
}
// The second parameter of StringCchCopy is 128 because you need
// room for a NULL-terminator.
hr = StringCchCopy(catinfo.szDescription, len + 1, catDescription);
// Make sure the description is null terminated.
catinfo.szDescription[len + 1] = '\0';

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

return hr;
}

// HRESULT RegisterCLSIDInCategory -
//      Register your component categories information
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;
}

// HRESULT UnRegisterCLSIDInCategory - Remove entries from the registry
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;
}

3、在ActivexTest.cpp文件中，添加CLSID_SafeItem的定义



 上面括号中的值 ActivexTestCrtl.cpp中获取到  如图



 4、ActivexTest.cpp添加两个头文件：

    

#include "Cathelp.h"
#include "objsafe.h"

5、ActivexTest.cpp中DllRegisterServer和DllUnregisterServer函数.

// DllRegisterServer - 将项添加到系统注册表

// DllRegisterServer - Adds entries to the system registry

STDAPI DllRegisterServer(void)
{
HRESULT hr; // HResult used by Safety Functions

AFX_MANAGE_STATE(_afxModuleAddrThis);

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

if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))
return ResultFromScode(SELFREG_E_CLASS);

// Mark the control as safe for initializing.

hr = CreateComponentCategory(CATID_SafeForInitializing,
L"Controls safely initializable from persistent data!");
if (FAILED(hr))
return hr;

hr = RegisterCLSIDInCategory(CLSID_SafeItem,
CATID_SafeForInitializing);
if (FAILED(hr))
return hr;

// Mark the control as safe for scripting.

hr = CreateComponentCategory(CATID_SafeForScripting,
L"Controls safely scriptable!");
if (FAILED(hr))
return hr;

hr = RegisterCLSIDInCategory(CLSID_SafeItem,
CATID_SafeForScripting);
if (FAILED(hr))
return hr;

return NOERROR;
}

// DllUnregisterServer - Removes entries from the system registry

STDAPI DllUnregisterServer(void)
{
AFX_MANAGE_STATE(_afxModuleAddrThis);

// 删除控件初始化安全入口.
HRESULT 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;

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

if (!COleObjectFactoryEx::UpdateRegistryAll(FALSE))
return ResultFromScode(SELFREG_E_CLASS);

return NOERROR;
}


7、到这 安全接口就完成实现，ie就不会弹出提示。