PIBIO_ENGINE_COMMIT_ENROLLMENT_FN回呼函式 (winbio_adapter.h)

由 Windows 生物特徵辨識架構呼叫以完成註冊物件、將它轉換成範本，並將範本儲存在資料庫中。

語法

PIBIO_ENGINE_COMMIT_ENROLLMENT_FN PibioEngineCommitEnrollmentFn;

HRESULT PibioEngineCommitEnrollmentFn(
  [in, out]      PWINBIO_PIPELINE Pipeline,
  [in]           PWINBIO_IDENTITY Identity,
  [in]           WINBIO_BIOMETRIC_SUBTYPE SubFactor,
  [in, optional] PUCHAR PayloadBlob,
  [in]           SIZE_T PayloadBlobSize
)
{...}

參數

[in, out] Pipeline

與執行作業之生物特徵辨識單位相關聯的 WINBIO_PIPELINE 結構的指標。

[in] Identity

WINBIO_IDENTITY 結構的指標，其中包含要儲存在資料庫中之範本的 GUID 或 SID。

[in] SubFactor

WINBIO_BIOMETRIC_SUBTYPE值，指定要儲存在資料庫中之範本的相關子因素。

[in, optional] PayloadBlob

包含 Windows 生物特徵辨識架構所產生之驗證簽章的位元組陣列選擇性指標。

[in] PayloadBlobSize

PayloadBlob 參數所指向之字元陣列的大小，以位元組為單位。 如果 PayloadBlob 參數為 NULL，這個值必須是 零。

傳回值

如果函式成功，則會傳回S_OK。 如果函式失敗，它必須傳回下列其中一個 HRESULT 值，或記憶體配接器所傳回的任何值。

備註

如果此函式成功，它應該會從管線排清註冊範本。 此動作的結果應該相當於呼叫 EngineAdapterClearContext。

如果此函式失敗，則不應該變更引擎內容的狀態。 特別是，如果有連結至管線的已完成範本，應該可以在任何失敗的原因) 將範本認可至資料庫之後，再次呼叫此函式 (。

支援開機前驗證的引擎配接器不僅必須將註冊認可至連接至管線的存儲設備適配卡，也必須認可到開機前儲存區域。 要如何完成此作業的詳細數據會保留給廠商。

範例

下列虛擬程式代碼顯示此函式的一個可能實作。 此範例不會編譯。 您必須調整它以符合您的用途。

//////////////////////////////////////////////////////////////////////////////////////////
//
// EngineAdapterCommitEnrollment
//
// Purpose:
//      Finalizes the enrollment object, converts it to a template, and saves 
//      the template in the database.
//
// Parameters:
//      Pipeline        - Pointer to a WINBIO_PIPELINE structure associated 
//                        with the biometric unit performing the operation
//      Identity        - GUID or SID of the template to be stored in the 
//                        database
//      SubFactor       - Sub-factor associated with the template to be stored
//                        in the database
//      PayloadBlob     - Optional pointer to an array of bytes that contain a 
//                        verification signature generated by the Windows Biometric
//                        Framework
//      PayloadBlobSize - Size, in bytes, of the character array pointed to by 
//                        the PayloadBlob parameter
//

static HRESULT
WINAPI
EngineAdapterCommitEnrollment(
    __inout PWINBIO_PIPELINE Pipeline,
    __in PWINBIO_IDENTITY Identity,
    __in WINBIO_BIOMETRIC_SUBTYPE SubFactor,
    __in PUCHAR PayloadBlob,
    __in SIZE_T PayloadBlobSize
    )
{
    HRESULT hr = S_OK;
    DWORD indexVector[NUMBER_OF_TEMPLATE_BINS] = {0};
    WINBIO_REJECT_DETAIL rejectDetail = 0;
    WINBIO_STORAGE_RECORD newTemplate = {0};

    // Verify that pointer arguments are not NULL.
    if (!ARGUMENT_PRESENT(Pipeline) ||
        !ARGUMENT_PRESENT(Identity))
    {
        hr = E_POINTER;
        goto cleanup;
    }

    if (ARGUMENT_PRESENT(PayloadBlob) && PayloadBlobSize == 0)
    {
        hr = E_INVALIDARG;
        goto cleanup;
    }
    
    if (!ARGUMENT_PRESENT(PayloadBlob) && PayloadBlobSize > 0)
    {
        hr = E_INVALIDARG;
        goto cleanup;
    }

    // TODO: Verify that the SubFactor and Identity arguments are valid.

    // Retrieve the context from the pipeline.
    PWINIBIO_ENGINE_CONTEXT context = 
        (PWINIBIO_ENGINE_CONTEXT)Pipeline->EngineContext;

    // Return if an enrollment is not in progress. This example assumes that 
    // an enrollment object is part of your engine context structure.
    if (context->Enrollment.InProgress != TRUE)
    {
        hr = WINBIO_E_INVALID_DEVICE_STATE;
        goto cleanup;
    }

    // If your adapter supports index vectors to place templates into buckets,
    // call a custom function (_AdapterCreateIndexVector) to create an index 
    // vector from the template data in the enrollment object.
    hr = _AdapterCreateIndexVector(
                context, 
                context->Enrollment.Template, 
                context->Enrollment.TemplateSize,
                indexVector, 
                NUMBER_OF_TEMPLATE_BINS, 
                &rejectDetail
                );
    if (FAILED(hr))
    {
        goto cleanup;
    }

    newTemplate.Identity = Identity;
    newTemplate.SubFactor = SubFactor;
    newTemplate.IndexVector = indexVector;
    newTemplate.IndexElementCount = NUMBER_OF_TEMPLATE_BINS;
    newTemplate.TemplateBlob = context->Enrollment.Template;
    newTemplate.TemplateBlobSize = context->Enrollment.TemplateSize;
    newTemplate.PayloadBlob = PayloadBlob;
    newTemplate.PayloadBlobSize = PayloadBlobSize;

    hr = WbioStorageAddRecord(
                Pipeline,
                &newTemplate
                );

    if (FAILED(hr))
    {
        goto cleanup;
    }

    // Call a custom function (_AdapterDestroyEnrollmentTemplate) to release
    // any resources held by the enrollment object.
    _AdapterDestroyEnrollmentTemplate(
        context,
        &context->Enrollment
        );

    // Specify that the enrollment process has been completed.
    context->Enrollment.InProgress = FALSE;

cleanup:

    return hr;
}

規格需求

另請參閱

EngineAdapterClearContext

外掛程式函式