#define PROTECTED_DACL_SECURITY_INFORMATION (0x80000000L)

BOOL Lock_CurrentProcess()
{
  HANDLE hProcess = ::GetCurrentProcess();
  SID_IDENTIFIER_AUTHORITY sia = SECURITY_WORLD_SID_AUTHORITY;
  PSID pSid;
  BOOL bSus = FALSE;
  bSus = ::AllocateAndInitializeSid(&sia,1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,&pSid);
  if(!bSus) goto Cleanup;
  HANDLE hToken;
  bSus = ::OpenProcessToken(hProcess,TOKEN_QUERY,&hToken);
  if(!bSus) goto Cleanup;
  DWORD dwReturnLength;
  ::GetTokenInformation(hToken,TokenUser,NULL,NULL,&dwReturnLength);
  if(dwReturnLength > 0x400) goto Cleanup;
  LPVOID TokenInformation;
  TokenInformation = ::LocalAlloc(LPTR,0x400);//这里就引用SDK的函数不引用CRT的了
  DWORD dw;
  bSus = ::GetTokenInformation(hToken,TokenUser,TokenInformation,0x400,&dw);
  if(!bSus) goto Cleanup;
  PTOKEN_USER pTokenUser = (PTOKEN_USER)TokenInformation;
  BYTE Buf[0x200];
  PACL pAcl = (PACL)&Buf;
  bSus = ::InitializeAcl(pAcl,1024,ACL_REVISION);
  if(!bSus) goto Cleanup;
  bSus = ::AddAccessDeniedAce(pAcl,ACL_REVISION,0x000000FA,pSid);
  if(!bSus) goto Cleanup;
  bSus = ::AddAccessAllowedAce(pAcl,ACL_REVISION,0x00100701,pTokenUser->User.Sid);
  if(!bSus) goto Cleanup;
  if(::SetSecurityInfo(hProcess,SE_KERNEL_OBJECT,DACL_SECURITY_INFORMATION | PROTECTED_DACL_SECURITY_INFORMATION,NULL,NULL,pAcl,NULL) == 0)
    bSus = TRUE;
Cleanup:
  if(hProcess != NULL)
    ::CloseHandle(hProcess);
  if(pSid != NULL)
    ::FreeSid(pSid);
  return bSus;
}

这段代码就可以锁住其他进程打开本进程,当然也就防止了注入,和读写内存.

可以更绝点Denied ALL ACCESS(0xFFFFFFFF)就连结束都不可能了

::AllocateAndInitializeSid 可以换成 :: InitializeSid .因为我们并不需要初始化子Sid.
另外.
  bSus = ::AddAccessDeniedAce(pAcl,ACL_REVISION,0x000000FA,pSid);
  if(!bSus) goto Cleanup;
  bSus = ::AddAccessAllowedAce(pAcl,ACL_REVISION,0x00100701,pTokenUser->User.Sid);
实际上只需要下面的一句,或者干脆把它去掉,因为如果不添加Ace默认就是没有权限.既然这样上面的那句话AllocateAndInitializeSid 也可以省掉,也似乎有些多余