Windows生物识别框架失败

Question

我的朋友让我写一个简单的程序，从计算机的内置读取器中捕获指纹，并打印出某种标识符。我可以自己选择操作系统，比如一台装有Windows或Linux的笔记本电脑，或者一部Android手机。

我认为这会很简单，当然有很多API可以做到这一点，我注意到微软自己实际上也为它提供了API。由于我可以使用指纹识别器登录到我的win10笔记本电脑，因此我知道识别器可以正常工作。

由于某些原因，微软自己在文档中提供的例子对我来说不起作用。https://docs.microsoft.com/en-us/windows/desktop/api/Winbio/nf-winbio-winbiocapturesample

我想写这些页面的人忘记了提到一些重要的方面或步骤，也许有一种方法可以在Visual Studio中的某个地方添加权限。

在重写和尝试了许多东西之后，至少我在这个过程中又前进了一步，但它仍然失败了。

这是当前版本

#include "pch.h"
#include <iostream>
#include "Windows.h"
#include "Stdio.h"
#include "Conio.h"
#include "Winbio.h"
HRESULT CaptureSample();
void capture(WINBIO_SESSION_HANDLE sessionHandle, int flag);

int main()
{
    std::cout << "Hello World!\n";
    HRESULT x = CaptureSample();
}

HRESULT CaptureSample()
{
    HRESULT hr = S_OK;
    WINBIO_SESSION_HANDLE sessionHandle = NULL;
    WINBIO_REJECT_DETAIL rejectDetail = 0;
    // Connect to the system pool. 
    hr = WinBioOpenSession(
        WINBIO_TYPE_FINGERPRINT,    // Service provider
        WINBIO_POOL_SYSTEM,         // Pool type
        WINBIO_FLAG_DEFAULT,            // Access: Capture raw data
        NULL,                       // Array of biometric unit IDs
        0,                          // Count of biometric unit IDs
        WINBIO_DB_DEFAULT,          // Default database
        &sessionHandle              // [out] Session handle
    );
    if (FAILED(hr))
    {
        wprintf_s(L"WinBioOpenSession failed. hr = 0x%x\n", hr);
        goto e_Exit;
    }

    wprintf_s(L"Start my fingerprint capturing...\n");
    capture(sessionHandle, WINBIO_DATA_FLAG_INTEGRITY);
    capture(sessionHandle, WINBIO_DATA_FLAG_PRIVACY);
    capture(sessionHandle, WINBIO_DATA_FLAG_SIGNED);
    capture(sessionHandle, WINBIO_DATA_FLAG_OPTION_MASK_PRESENT);
    capture(sessionHandle, WINBIO_DATA_FLAG_RAW);
    capture(sessionHandle, WINBIO_DATA_FLAG_INTERMEDIATE);
    capture(sessionHandle, WINBIO_DATA_FLAG_PROCESSED);
    hr = WinBioEnrollCapture(sessionHandle, &rejectDetail);
    wprintf_s(L"WinBioEnrollCapture hr=%x rejection = %d\n", hr, rejectDetail);

    if (sessionHandle != NULL)
    {
        WinBioCloseSession(sessionHandle);
        sessionHandle = NULL;
    }

e_Exit:
    wprintf_s(L"\n Press any key to exit...");
    _getch();

    return hr;

}

void capture(WINBIO_SESSION_HANDLE sessionHandle, int flag) {
    WINBIO_UNIT_ID unitId = 0;
    WINBIO_REJECT_DETAIL rejectDetail = 0;
    PWINBIO_BIR sample = NULL;
    SIZE_T sampleSize = 0;
    wprintf_s(L"\n Calling WinBioCaptureSample. Flag = %d.\n", flag);
    HRESULT hr = WinBioCaptureSample(
        sessionHandle,
        WINBIO_PURPOSE_IDENTIFY,
        flag,
        &unitId,
        &sample,
        &sampleSize,
        &rejectDetail
    );
    if (FAILED(hr))
    {
        if (hr == WINBIO_E_BAD_CAPTURE)
        {
            wprintf_s(L"\n Bad capture; reason: %d\n", rejectDetail);
        }
        else if (hr == E_ACCESSDENIED)
        {
            wprintf_s(L"\n WinBioCaptureSample failed, access denied.");
        }
        else
        {
            wprintf_s(L"\n WinBioCaptureSample failed. hr = 0x%x\n", hr);
        }
        goto e_Exit;
    }

    wprintf_s(L"\n Swipe processed - Unit ID: %d\n", unitId);
    wprintf_s(L"\n Captured %d bytes.\n", sampleSize);

e_Exit:
    if (sample != NULL)
    {
        WinBioFree(sample);
        sample = NULL;
    }


}

下面是运行它的结果：

Hello World!
Start my fingerprint capturing...

 Calling WinBioCaptureSample. Flag = 1.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 2.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 4.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 8.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 32.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 64.

 WinBioCaptureSample failed, access denied.
 Calling WinBioCaptureSample. Flag = 128.

 WinBioCaptureSample failed, access denied.WinBioEnrollCapture hr=8009802c rejection = 0

 Press any key to exit...

我遗漏了什么？

Answer 1

我认为您应该尝试使用其他API，尽管您的目标在这里并不明确。您可以查看CloudABIS™，它是超标量、生物识别即服务(BaaS)匹配系统，可以以更低的成本快速部署。应用编程接口是由M2SYS TEchnology提供的，他们也有大量的硬件。