WinBioVerifyWithCallback 函式 (winbio.h)

發行項
03/03/2024

以異步方式擷取生物特徵辨識樣本，並判斷樣本是否對應至指定的使用者身分識別。函式會立即傳回給呼叫端、在不同的線程上執行擷取和驗證，以及呼叫應用程式定義的回呼函式以更新作業狀態。

重要

建議您從 Windows 8 開始，您不再使用此函式來啟動異步操作。請改為執行下列動作：

實作PWINBIO_ASYNC_COMPLETION_CALLBACK 函式，以在作業完成時接收通知。
呼叫 WinBioAsyncOpenSession 函式。在 CallbackRoutine 參數中傳遞回呼的位址。在 NotificationMethod 參數中傳遞WINBIO_ASYNC_NOTIFY_CALLBACK。擷取異步會話句柄。
使用異步會話句柄來呼叫 WinBioVerify。當作業完成時，Windows 生物特徵辨識架構會使用結果配置和初始化 WINBIO_ASYNC_RESULT 結構，並使用結果結構的指標叫用回呼。
從回呼實作呼叫 WinBioFree ，以在完成使用之後釋放 WINBIO_ASYNC_RESULT 結構。

語法

HRESULT WinBioVerifyWithCallback(
  [in]           WINBIO_SESSION_HANDLE    SessionHandle,
  [in]           WINBIO_IDENTITY          *Identity,
  [in]           WINBIO_BIOMETRIC_SUBTYPE SubFactor,
  [in]           PWINBIO_VERIFY_CALLBACK  VerifyCallback,
  [in, optional] PVOID                    VerifyCallbackContext
);

參數

[in] SessionHandle

識別開放式生物特徵辨識會話 的WINBIO_SESSION_HANDLE 值。

[in] Identity

包含使用者提供生物特徵辨識範例之 GUID 或 SID 之 WINBIO_IDENTITY 結構的指標。

[in] SubFactor

WINBIO_BIOMETRIC_SUBTYPE值，指定與生物特徵辨識樣本相關聯的子因素。如需詳細資訊，請參閱＜備註＞一節。

[in] VerifyCallback

驗證成功或失敗時 ，WinBioVerifyWithCallback 函式所呼叫的回呼函式位址。您必須建立回呼。

[in, optional] VerifyCallbackContext

在回調函式的 VerifyCallbackContext 參數中傳回的選擇性應用程式定義結構。此結構可以包含自定義回呼函式設計用來處理的任何數據。

傳回值

如果函式成功，它會 傳回S_OK。如果函式失敗，它會傳回 指出錯誤的 HRESULT 值。可能的值包括 (但不限於) 下表中的這些值。如需常見錯誤碼的清單，請參閱一般 HRESULT 值。

傳回碼	Description
E_HANDLE	會話句柄無效。
E_INVALIDARG	SubFactor 自變數不正確。
E_POINTER	Identity 和 VerifyCallback 參數指定的指標不可為 NULL。

備註

SubFactor 參數會指定與生物特徵辨識樣本相關聯的子因素。 Windows 生物特徵辨識架構 (WBF) 目前僅支持指紋擷取，並使用下列常數來代表子類型資訊。

WINBIO_ANSI_381_POS_RH_THUMB
WINBIO_ANSI_381_POS_RH_INDEX_FINGER
WINBIO_ANSI_381_POS_RH_MIDDLE_FINGER
WINBIO_ANSI_381_POS_RH_RING_FINGER
WINBIO_ANSI_381_POS_RH_LITTLE_FINGER
WINBIO_ANSI_381_POS_LH_THUMB
WINBIO_ANSI_381_POS_LH_INDEX_FINGER
WINBIO_ANSI_381_POS_LH_MIDDLE_FINGER
WINBIO_ANSI_381_POS_LH_RING_FINGER
WINBIO_ANSI_381_POS_LH_LITTLE_FINGER
WINBIO_ANSI_381_POS_RH_FOUR_FINGERS
WINBIO_ANSI_381_POS_LH_FOUR_FINGERS

回呼例程會在呼叫進程中任意線程的內容中執行。呼叫端負責同步存取任何可能在回呼與應用程式其他部分之間共用的記憶體。

WinBioVerifyWithCallback 函式會立即傳回，並將S_OK傳遞給呼叫者。若要判斷擷取和驗證程序的狀態，您必須檢查回呼函式中的 OperationStatus 參數。

您可以呼叫 WinBioCancel 函式來取消擱置的回呼作業。關閉會話也會隱含地取消該會話的回呼。

回呼例程必須具有下列簽章：


VOID CALLBACK VerifyCallback(
__in_opt PVOID VerifyCallbackContext,
__in HRESULT OperationStatus,
__in WINBIO_UNIT_ID UnitId,
__in BOOLEAN Match,
__in WINBIO_REJECT_DETAIL RejectDetail
);

範例

下列函式會呼叫 WinBioVerifyWithCallback ，以異步方式判斷生物特徵辨識範例是否符合目前使用者的登入身分識別。也會包含回呼例程 VerifyCallback 和 Helper 函式 GetCurrentUserIdentity。連結至Winbio.lib 靜態庫，並包含下列頭檔：

Windows.h
Stdio.h
Conio.h
Winbio.h

HRESULT VerifyWithCallback(BOOL bCancel, WINBIO_BIOMETRIC_SUBTYPE subFactor)
{
    // Declare variables.
    HRESULT hr = S_OK;
    WINBIO_SESSION_HANDLE sessionHandle = NULL;
    WINBIO_UNIT_ID unitId = 0;
    WINBIO_REJECT_DETAIL rejectDetail = 0;
    WINBIO_IDENTITY identity = {0};

    // Find the identity of the user.
    hr = GetCurrentUserIdentity( &identity );
    if (FAILED(hr))
    {
        wprintf_s(L"\n User identity not found. hr = 0x%x\n", hr);
        goto e_Exit;
    }

    // Connect to the system pool. 
    hr = WinBioOpenSession( 
            WINBIO_TYPE_FINGERPRINT,    // Service provider
            WINBIO_POOL_SYSTEM,         // Pool type
            WINBIO_FLAG_DEFAULT,        // Configuration and access
            NULL,                       // Array of biometric unit IDs
            0,                          // Count of biometric unit IDs
            NULL,                       // Database ID
            &sessionHandle              // [out] Session handle
            );
    if (FAILED(hr))
    {
        wprintf_s(L"\n WinBioOpenSession failed. hr = 0x%x\n", hr);
        goto e_Exit;
    }

    // Verify a biometric sample asynchronously.
    wprintf_s(L"\n Calling WinBioVerifyWithCallback.\n");
    hr = WinBioVerifyWithCallback(
            sessionHandle,              // Open session handle
            &identity,                  // User SID or GUID
            subFactor,                  // Sample sub-factor
            VerifyCallback,             // Callback function
            NULL                        // Optional context
            );
    if (FAILED(hr))
    {
        wprintf_s(L"\n WinBioVerifyWithCallback failed. hr = 0x%x\n", hr);
        goto e_Exit;
    }
    wprintf_s(L"\n Swipe the sensor ...\n");

    // Cancel the identification if the bCancel flag is set.
    if (bCancel)
    {
        wprintf_s(L"\n Starting CANCEL timer...\n");
        Sleep( 7000 );

        wprintf_s(L"\n Calling WinBioCancel\n");
        hr = WinBioCancel( sessionHandle );
        if (FAILED(hr))
        {
            wprintf_s(L"\n WinBioCancel failed. hr = 0x%x\n", hr);
            goto e_Exit;
        }
    }

    // Wait for the asynchronous identification process to complete 
    // or be canceled.
    hr = WinBioWait( sessionHandle );
    if (FAILED(hr))
    {
        wprintf_s(L"\n WinBioWait failed. hr = 0x%x\n", hr);
    }

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

    wprintf_s(L"\n Hit any key to continue...");
    _getch();

    return hr;
}

//------------------------------------------------------------------------
// The following function is the callback for WinBioVerifyWithCallback.
// The function filters the response from the biometric subsystem and 
// writes a result to the console window.
// 
VOID CALLBACK VerifyCallback(
  __in_opt PVOID VerifyCallbackContext,
  __in HRESULT OperationStatus,
  __in WINBIO_UNIT_ID UnitId,
  __in BOOLEAN Match,
  __in WINBIO_REJECT_DETAIL RejectDetail
  )
{
    UNREFERENCED_PARAMETER(VerifyCallbackContext);
    UNREFERENCED_PARAMETER(Match);

    wprintf_s(L"\n VerifyCallback executing");
    wprintf_s(L"\n Swipe processed for unit ID %d\n", UnitId);

    // The identity could not be verified.
    if (FAILED(OperationStatus))
    {
        wprintf_s(L"\n Verification failed for the following reason:");
        if (OperationStatus == WINBIO_E_NO_MATCH)
        {
            wprintf_s(L"\n No match.\n");
        }
        else if (OperationStatus == WINBIO_E_BAD_CAPTURE)
        {
            wprintf_s(L"\n Bad capture.\n ");
            wprintf_s(L"\n Bad capture; reason: %d\n", RejectDetail);
        }
        else
        {
            wprintf_s(L"VerifyCallback failed.");
            wprintf_s(L"OperationStatus = 0x%x\n", OperationStatus); 
        }
        goto e_Exit;
    }

    // The user identity was verified.
    wprintf_s(L"\n Fingerprint verified:\n");

e_Exit:
    return;
}

//------------------------------------------------------------------------
// The following function retrieves the identity of the current user.
// This is a helper function and is not part of the Windows Biometric
// Framework API.
//
HRESULT GetCurrentUserIdentity(__inout PWINBIO_IDENTITY Identity)
{
    // Declare variables.
    HRESULT hr = S_OK;
    HANDLE tokenHandle = NULL;
    DWORD bytesReturned = 0;
    struct{
        TOKEN_USER tokenUser;
        BYTE buffer[SECURITY_MAX_SID_SIZE];
    } tokenInfoBuffer;

    // Zero the input identity and specify the type.
    ZeroMemory( Identity, sizeof(WINBIO_IDENTITY));
    Identity->Type = WINBIO_ID_TYPE_NULL;

    // Open the access token associated with the
    // current process
    if (!OpenProcessToken(
            GetCurrentProcess(),            // Process handle
            TOKEN_READ,                     // Read access only
            &tokenHandle))                  // Access token handle
    {
        DWORD win32Status = GetLastError();
        wprintf_s(L"Cannot open token handle: %d\n", win32Status);
        hr = HRESULT_FROM_WIN32(win32Status);
        goto e_Exit;
    }

    // Zero the tokenInfoBuffer structure.
    ZeroMemory(&tokenInfoBuffer, sizeof(tokenInfoBuffer));

    // Retrieve information about the access token. In this case,
    // retrieve a SID.
    if (!GetTokenInformation(
            tokenHandle,                    // Access token handle
            TokenUser,                      // User for the token
            &tokenInfoBuffer.tokenUser,     // Buffer to fill
            sizeof(tokenInfoBuffer),        // Size of the buffer
            &bytesReturned))                // Size needed
    {
        DWORD win32Status = GetLastError();
        wprintf_s(L"Cannot query token information: %d\n", win32Status);
        hr = HRESULT_FROM_WIN32(win32Status);
        goto e_Exit;
    }

    // Copy the SID from the tokenInfoBuffer structure to the
    // WINBIO_IDENTITY structure. 
    CopySid(
        SECURITY_MAX_SID_SIZE,
        Identity->Value.AccountSid.Data,
        tokenInfoBuffer.tokenUser.User.Sid
        );

    // Specify the size of the SID and assign WINBIO_ID_TYPE_SID
    // to the type member of the WINBIO_IDENTITY structure.
    Identity->Value.AccountSid.Size = GetLengthSid(tokenInfoBuffer.tokenUser.User.Sid);
    Identity->Type = WINBIO_ID_TYPE_SID;

e_Exit:

    if (tokenHandle != NULL)
    {
        CloseHandle(tokenHandle);
    }

    return hr;
}

規格需求

需求	值
最低支援的用戶端	Windows 7 [僅限傳統型應用程式]
最低支援的伺服器	Windows Server 2008 R2 [僅限桌面應用程式]
目標平台	Windows
標頭	winbio.h (包含Winbio.h)
程式庫	Winbio.lib
Dll	Winbio.dll

另請參閱

WinBioCancel

WinBioVerify

共用方式為

WinBioVerifyWithCallback 函式 (winbio.h)

語法

參數

傳回值

備註

範例

規格需求

另請參閱

意見反應

意見反應

其他資源