WMI返回不同格式的信息 [英] WMI returns information in different formats

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本文介绍了WMI返回不同格式的信息的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想阅读硬件配置,以检查我的软件许可证是否有效.目前,我尝试使用WMI.这在许多机器上都可以正常工作数周,但有时,WMI会在没有明显原因的情况下以另一种格式返回硬件配置.例如,主硬盘的序列号从字符转换为十六进制字符串,所有字符十六进制值都成对交换.我发现不同的Windows用户类型(管理员/普通用户)会影响格式,但在其他情况下以及以不同的方式也会发生变化,因此我无法找出一种模式.

I want to read the hardware configuration to check if a license for my software is valid. Currently, I tried using WMI. This works fine on many machines for several weeks but sometimes, without an obvious reason, WMI returns the hardware configuration in a different format. For example, the serial number of the primary hard disc is converted from characters to a hex string, with all character hex values being swapped pair wise. I figured out that different Windows user types (admin/normal) influence the format but it also changes in other situations and in different ways, for which I am unable to figure out a pattern.

有人知道如何使用WMI可靠地检查硬件配置吗?还是可以使用MFC来避免上述问题?

Does anybody know how to reliably check the hardware configuration using WMI? Or would it be possible to avoid the above problem using MFC?

推荐答案

WMI确实不可靠.不需要时应避免使用它.

WMI is indeed unreliable. You should avoid using it when you don't need it.

这是没有WMI的一种方法:

Here's one way without WMI:

#include <string>
#include <Dbt.h>
#include <winioctl.h>
#include <SetupAPI.h>
#pragma comment(lib, "SetupAPI.lib")

#include <initguid.h>

DWORD getDeviceNumber(HANDLE hDeviceHandle)
{
    STORAGE_DEVICE_NUMBER sdn = { 0 };
    sdn.DeviceNumber = -1;
    DWORD dwBytesReturned = 0;
    if (!DeviceIoControl(hDeviceHandle, IOCTL_STORAGE_GET_DEVICE_NUMBER, nullptr, 0, &sdn, sizeof(sdn), &dwBytesReturned, nullptr))
    {
        return -1; //Error
    }
    return sdn.DeviceNumber;
}

bool GetDeviceString(std::wstring &out)
{
    wchar_t wDevicePath[] = L"\\\\.\\@:";
    wDevicePath[4] = L'C'; //Replace this with your drive-letter & adjust code (C: / D: whatever)
    HANDLE deviceHandle = CreateFileW(wDevicePath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
    if (deviceHandle == INVALID_HANDLE_VALUE)
        return false;
    DWORD dwVolumeDeviceNumber = getDeviceNumber(deviceHandle);
    CloseHandle(deviceHandle);
    HDEVINFO hDevInfo = SetupDiGetClassDevsW(&GUID_DEVINTERFACE_DISK, nullptr, nullptr, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
    if (hDevInfo == INVALID_HANDLE_VALUE)
        return false; //Error
    std::vector<BYTE> buf(1024);
    PSP_DEVICE_INTERFACE_DETAIL_DATA_W psp = reinterpret_cast<PSP_DEVICE_INTERFACE_DETAIL_DATA_W>(buf.data());
    SP_DEVICE_INTERFACE_DATA spInt;
    SP_DEVINFO_DATA spDev;
    spInt.cbSize = sizeof(spInt);

    DWORD dwIndex = 0;
    while (true)
    {
        if (!SetupDiEnumDeviceInterfaces(hDevInfo, nullptr, &GUID_DEVINTERFACE_DISK, dwIndex, &spInt))
            break;
        DWORD dwSize = 0;
        SetupDiGetDeviceInterfaceDetailW(hDevInfo, &spInt, nullptr, 0, &dwSize, nullptr);
        if (dwSize && dwSize <= buf.size())
        {
            psp->cbSize = sizeof(*psp);
            memset(&spDev, sizeof(spDev), 0);
            spDev.cbSize = sizeof(spDev);

            long res = SetupDiGetDeviceInterfaceDetailW(hDevInfo, &spInt, psp, dwSize, &dwSize, &spDev);
            if (res)
            {
                HANDLE hDrive = CreateFileW(psp->DevicePath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
                if (hDrive != INVALID_HANDLE_VALUE)
                {
                    DWORD dwUsbDeviceNumber = getDeviceNumber(hDrive);
                    if (dwUsbDeviceNumber == dwVolumeDeviceNumber)
                    {
                        //Found
                        out = psp->DevicePath;
                        break;
                    }
                }
                CloseHandle(hDrive);
            }
        }
        ++dwIndex;
    }
    SetupDiDestroyDeviceInfoList(hDevInfo);

    if (out.empty()) //Was not found
        return false;
    return true;
}

在那之后,您将获得一个大的设备字符串.您可能想从中读取所需的信息.
检查以下正则表达式以检索它们:
(请注意,字符串可能会更改,具体取决于设备类型,因此请对其进行测试并添加/调整正则表达式-这些均来自USB棒测试)

After that, you will get a large device string. You might want to read the needed information out of it.
Check the following regular expressions to retrieve these:
(Note that the string CAN change, depending on the device-type, so test it and add/adjust the regular expressions - these are from an USB-stick test)

ven_([^&#]+)    //Vendor String/ID
prod_([^&#]+)   //Product String/ID
rev_([^&#]+)    //Revision String/ID
&[^#]*#([^&#]+) //Serial String/Number

正则表达式?另一个例子:

Regular expressions ? Another example:

std::wregex (请参见 std::wsmatch (请参阅

std::wregex (see std::basic_regex...).
std::wsmatch (see std::match_results...)

std::wstring wsDeviceString;
if (GetDeviceString(wsDeviceString))
{
    std::wregex regexSerialNumber(L"&[^#]*#([^&#]+)");
    std::wsmatch match;
    if (std::regex_search(wsDeviceString, match, regexSerialNumber))
        std::wcout << L"Serial Number of device is: " << match[1].str() << std::endl;
}

请给您的产品一个许可证=)

One license for your product please =)

这篇关于WMI返回不同格式的信息的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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