有没有办法在IE11上从AppContainer BHO创建命名管道?

时间:2013-09-24 12:55:51

标签: internet-explorer bho internet-explorer-11 epm appcontainer

我正在尝试为Internet Explorer 11(Windows 8.1)编写BHO。 我的BHO实现了AppContainer沙箱,但我似乎无法创建命名管道,CreateNamedPipe失败并显示该消息: Access is denied.

这是我用来创建命名管道的代码(我在russian website上找到了,最后一条评论:

        LPCWSTR LOW_INTEGRITY_SDDL_SACL_W = L"S:(ML;;NW;;;LW)D:(A;;0x120083;;;WD)(A;;0x120083;;;AC)";

        PSECURITY_DESCRIPTOR pSD = NULL;
        ConvertStringSecurityDescriptorToSecurityDescriptorW (
            LOW_INTEGRITY_SDDL_SACL_W,
            SDDL_REVISION_1,
            &pSD,
            NULL );

        if ( pSD != NULL)
        {
            SECURITY_ATTRIBUTES  SecurityAttributes;

            SecurityAttributes.nLength = sizeof(SECURITY_ATTRIBUTES);
            SecurityAttributes.bInheritHandle = TRUE;
            SecurityAttributes.lpSecurityDescriptor = pSD;

            HANDLE hPipe = CreateNamedPipe(
                L"\\\\.\\pipe\\testpipe",
                PIPE_ACCESS_DUPLEX,                     
                PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
                1,                                  
                4096,                   
                4096,                               
                1000,
                &SecurityAttributes);           

        }

不幸的是,它不起作用。 GetLastError()照常返回此 Access is denied

3 个答案:

答案 0 :(得分:8)

您无法在BHO中创建命名管道。但您可以在代理程序进程中创建它并从BHO连接到管道。 我是尖头评论的作者,我在我的IE插件的代理部分测试了代码。

代码片段。在自动启动的exe(Delphi)中创建管道

function CreateAppContainerSecurityDescriptor(var SD: PSECURITY_DESCRIPTOR): boolean;
const
  SDDL_REVISION_1 = 1;
var
  pSD: PSECURITY_DESCRIPTOR;
  ConvertStringSecurityDescriptorToSecurityDescriptor: TConvertStringSecurityDescriptorToSecurityDescriptorW;
begin
  @ConvertStringSecurityDescriptorToSecurityDescriptor := GetProcAddress(AdvapiDll(),
    'ConvertStringSecurityDescriptorToSecurityDescriptorW');
  result := false;
  if ConvertStringSecurityDescriptorToSecurityDescriptor('S:(ML;;NW;;;LW)D:(A;;0x120083;;;WD)(A;;0x120083;;;AC)',
    SDDL_REVISION_1, pSD, nil) then begin
    SD := pSD;
    result := true;
  end;
end;

function TPipeServer.Start: boolean;
var
  SD: PSECURITY_DESCRIPTOR;
  SecurityAttributes: SECURITY_ATTRIBUTES;
begin
  result := false;
  if Win32MajorVersion >= 6 then begin
    if CreateAppContainerSecurityDescriptor(SD) then begin
      SecurityAttributes.nLength := sizeof(SECURITY_ATTRIBUTES);
      SecurityAttributes.bInheritHandle := true;
      SecurityAttributes.lpSecurityDescriptor := SD;

      PipeHandle := CreateNamedPipe('\\.\pipe\MyPipe', PIPE_ACCESS_DUPLEX,
        PIPE_TYPE_BYTE or PIPE_READMODE_BYTE, 1, 0, 0, 1000, @SecurityAttributes);
      result := PipeHandle <> INVALID_HANDLE_VALUE;
    end;
  end;
end;

procedure TPipeServer.Execute;
begin
  if Start() then begin
    while true do begin
      if ConnectNamedPipe(PipeHandle, nil) then begin
        ...
      end;
    end;
  end;
end;

在IE工具栏(C ++)中连接到管道

#define PIPE_NAME "\\\\.\\pipe\\MYPipe"

LRESULT CMFToolbar::OnCommand(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
...
    HANDLE PipeHandle;
    if (WaitNamedPipe(PIPE_NAME, NMPWAIT_WAIT_FOREVER) != 0) {
        PipeHandle = CreateFile(PIPE_NAME, FILE_READ_DATA | FILE_WRITE_DATA,
            0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
        if (PipeHandle != INVALID_HANDLE_VALUE) {
            WriteFile(PipeHandle, ...
            CloseHandle(PipeHandle);
        }

}

答案 1 :(得分:0)

您可以将ALL_APPLICATION_PACKAGE权限添加到句柄,但这是一个后门解决方案,代理解决方案是长期的。

DWORD WindowsSecurity::AddDACLToObject(HANDLE hObj,SE_OBJECT_TYPE seObjectType) {
LPWSTR szAddSid = SID_ALL_APP_PACKAGES;

PACL pACL = NULL;
DWORD dwRes;
PSID pSIDAllAppPackage = NULL;

PSECURITY_DESCRIPTOR pSDOld = NULL;
PACL pOldDACL = NULL;
dwRes = GetSecurityInfo(hObj, seObjectType, 
    DACL_SECURITY_INFORMATION,
    NULL, NULL, &pOldDACL, NULL, &pSDOld);
if (ERROR_SUCCESS != dwRes) {
    return dwRes;
} 

if(ConvertStringSidToSid(szAddSid,&pSIDAllAppPackage) == FALSE) {
    dwRes = GetLastError();
    return dwRes;
}

const int NUM_ACES  = 1;
EXPLICIT_ACCESS ea[NUM_ACES];
ZeroMemory(&ea, NUM_ACES * sizeof(EXPLICIT_ACCESS));

ea[0].grfAccessPermissions = GENERIC_ALL;
ea[0].grfAccessMode = SET_ACCESS;
ea[0].grfInheritance = NO_INHERITANCE;
ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
ea[0].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
ea[0].Trustee.ptstrName = (LPTSTR)pSIDAllAppPackage;

dwRes = SetEntriesInAcl(NUM_ACES, ea, pOldDACL, &pACL);
if (ERROR_SUCCESS != dwRes) {
    return dwRes;
}

dwRes = SetSecurityInfo(
    hObj,                 // name of the object
    seObjectType,              // type of object
    DACL_SECURITY_INFORMATION,   // change only the object's DACL
    NULL, NULL,                  // do not change owner or group
    pACL,                        // DACL specified
    NULL);                       // do not change SACL
return dwRes;

}

答案 2 :(得分:0)

我发现这个问题非常有用,并希望根据我最近在复杂产品中改装兼容EPM的BHO的经验来增加2美分。在这里删除一些有助于社区的信息。我的原始问题已在此处发布,因此其中一些问题重复了我的评论 - Accessing named pipe servers from within IE EPM BHO

我需要一些方法来实现双向沟通 -

  1. 从BHO到拥有一些相关数据的Windows服务:上面的安全描述符不起作用,因为跨会话IPC似乎不起作用。我尝试将命名管道设置为允许每个人。

    • 通过添加经纪人来传达通信来解决这个问题。
  2. 从外部到BHO:这是为BHO提供一些数据来执行操作 - DOM操作等。标准IPC选项 - 命名管道,Windows RPC等将无法工作,因为BHO无法托管命名管道用于外部访问的服务器,看起来像。

    • 通过在SetSite函数中创建HWND_MESSAGE窗口并使用SendMessage从Broker进程调用它来解决它。使用的消息类型必须是WM_COPYDATA,因为这是跨进程的。