Function getCurrentUser

src/envsecurity.cpp:499–543

}

MallocPtr<void> getCurrentUser()
{
  HANDLE hnd      = ::GetCurrentProcess();
  HANDLE rawToken = 0;

  BOOL ret = ::OpenProcessToken(hnd, TOKEN_QUERY, &rawToken);
  if (!ret) {
    const auto e = GetLastError();
    throw(e, "OpenProcessToken()");
  }

  HandlePtr token(rawToken);

  DWORD retsize = 0;
  ret           = ::GetTokenInformation(token.get(), TokenUser, 0, 0, &retsize);

  if (!ret) {
    const auto e = GetLastError();
    if (e != ERROR_INSUFFICIENT_BUFFER) {
      throw failed(e, "GetTokenInformation() for length");
    }
  }

  MallocPtr<void> tokenBuffer(std::malloc(retsize));
  ret = ::GetTokenInformation(token.get(), TokenUser, tokenBuffer.get(), retsize,
                              &retsize);

  if (!ret) {
    const auto e = GetLastError();
    throw failed(e, "GetTokenInformation()");
  }

  PSID tokenSid = ((PTOKEN_USER)(tokenBuffer.get()))->User.Sid;
  DWORD sidLen  = ::GetLengthSid(tokenSid);
  MallocPtr<void> currentUserSID((SID*)(malloc(sidLen)));

  ret = ::CopySid(sidLen, currentUserSID.get(), tokenSid);

  if (!ret) {
    const auto e = GetLastError();
    throw failed(e, "CopySid()");
  }

  return currentUserSID;
}

ACCESS_MASK getEffectiveRights(ACL* dacl, PSID sid)
{