本文讨论如何使用 Windows生物识别框架API创建使用专用传感器池的客户端应用程序。
注册生物识别信息
以下代码示例演示如何在系统池中注册生物识别模板。
同步注册
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioLocateSensor来查找生物识别单元。
- 调用 WinBioEnrollBegin以启动注册序列。
- 调用 WinBioEnrollCapture以处理传感器上的多个手指轻扫。
- 调用 WinBioEnrollCommit以将模板保存在存储区中。
若要编译此示例，请链接到Winbio.lib静态库并包含以下头文件：
- Windows.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT EnrollSysPool(
BOOL discardEnrollment,
WINBIO_BIOMETRIC_SUBTYPE subFactor)
{
HRESULT hr = S_OK;
WINBIO_IDENTITY identity = {0};
WINBIO_SESSION_HANDLE sessionHandle = NULL;
WINBIO_UNIT_ID unitId = 0;
WINBIO_REJECT_DETAIL rejectDetail = 0;
BOOLEAN isNewTemplate = TRUE;// 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. ");
wprintf_s(L"hr = 0x%x\n", hr);
goto e_Exit;
}// Locate a sensor.
wprintf_s(L"\n Swipe your finger on the sensor...\n");
hr = WinBioLocateSensor( sessionHandle, &unitId);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensor failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Begin the enrollment sequence.
wprintf_s(L"\n Starting enrollment sequence...\n");
hr = WinBioEnrollBegin(
sessionHandle, // Handle to open biometric session
subFactor, // Finger to create template for
unitId // Biometric unit ID
);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioEnrollBegin failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Capture enrollment information by swiping the sensor with
// the finger identified by the subFactor argument in the
// WinBioEnrollBegin function.
for (int swipeCount = 1;; ++swipeCount)
{
wprintf_s(L"\n Swipe the sensor to capture %s sample.",
(swipeCount == 1)?L"the first":L"another");hr = WinBioEnrollCapture(
sessionHandle, // Handle to open biometric session
&rejectDetail // [out] Failure information
);wprintf_s(L"\n Sample %d captured from unit number %d.",
swipeCount,
unitId);if (hr == WINBIO_I_MORE_DATA)
{
wprintf_s(L"\n More data required.\n");
continue;
}
if (FAILED(hr))
{
if (hr == WINBIO_E_BAD_CAPTURE)
{
wprintf_s(L"\n Error: Bad capture; reason: %d",
rejectDetail);
continue;
}
else
{
wprintf_s(L"\n WinBioEnrollCapture failed. hr = 0x%x", hr);
goto e_Exit;
}
}
else
{
wprintf_s(L"\n Template completed.\n");
break;
}
}// Discard the enrollment if the appropriate flag is set.
// Commit the enrollment if it is not discarded.
if (discardEnrollment == TRUE)
{
wprintf_s(L"\n Discarding enrollment...\n\n");
hr = WinBioEnrollDiscard( sessionHandle );
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensor failed. hr = 0x%x\n", hr);
}
goto e_Exit;
}
else
{
wprintf_s(L"\n Committing enrollment...\n");
hr = WinBioEnrollCommit(
sessionHandle, // Handle to open biometric session
&identity, // WINBIO_IDENTITY object for the user
&isNewTemplate); // Is this a new templateif (FAILED(hr))
{
wprintf_s(L"\n WinBioEnrollCommit failed. hr = 0x%x\n", hr);
goto e_Exit;
}
}e_Exit:
if (sessionHandle != NULL)
{
WinBioCloseSession(sessionHandle);
sessionHandle = NULL;
}wprintf_s(L" Press any key to continue...");
_getch();return hr;
}异步注册
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioLocateSensor来查找生物识别单元。
- 调用 WinBioEnrollBegin以启动注册序列。
- 调用 WinBioEnrollCaptureWithCallback来处理多个手指轻扫。 此函数是异步的，并使用自定义回调函数继续处理单独的线程。 下面包括一个示例回调函数。
- 调用 WinBioWait等待异步注册过程完成或取消。
- 调用 WinBioEnrollCommit保存模板。
链接到 Winbio.lib 静态库以编译此示例。
//---------------------------------------------
// EnrollSystemPoolWithCallback.cpp : Entry point for the application.
//
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <winbio.h>//--------------------------------------------
// Forward declarations.
//
HRESULT EnrollSysPoolWithCallback(
BOOL bCancel,
BOOL bDiscard,
WINBIO_BIOMETRIC_SUBTYPE subFactor);VOID CALLBACK EnrollCaptureCallback(
__in_opt PVOID EnrollCallbackContext,
__in HRESULT OperationStatus,
__in WINBIO_REJECT_DETAIL RejectDetail);typedef struct _ENROLL_CALLBACK_CONTEXT {
WINBIO_SESSION_HANDLE SessionHandle;
WINBIO_UNIT_ID UnitId;
WINBIO_BIOMETRIC_SUBTYPE SubFactor;
} ENROLL_CALLBACK_CONTEXT, *PENROLL_CALLBACK_CONTEXT;//------------------------------------------------------------------------
int wmain()
{
HRESULT hr = S_OK;hr = EnrollSysPoolWithCallback(
FALSE,
FALSE,
WINBIO_ANSI_381_POS_RH_INDEX_FINGER);return 0;
}//------------------------------------------------------------------------
// The following function enrolls a user's fingerprint in the system pool.
// The function calls WinBioEnrollCaptureWithCallback and waits for the
// asynchronous enrollment process to be completed or canceled.
//
HRESULT EnrollSysPoolWithCallback(
BOOL bCancel,
BOOL bDiscard,
WINBIO_BIOMETRIC_SUBTYPE subFactor)
{
// Declare variables
HRESULT hr = S_OK;
WINBIO_IDENTITY identity = {0};
WINBIO_SESSION_HANDLE sessionHandle = NULL;
WINBIO_UNIT_ID unitId = 0;
BOOLEAN isNewTemplate = TRUE;
ENROLL_CALLBACK_CONTEXT callbackContext = {0};// 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 WinBioEnumBiometricUnits failed. ");
wprintf_s(L"hr = 0x%x\n", hr);
goto e_Exit;
}// Locate the sensor.
wprintf_s(L"\n Swipe your finger to locate the sensor...\n");
hr = WinBioLocateSensor( sessionHandle, &unitId);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensor failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Begin the enrollment sequence.
hr = WinBioEnrollBegin(
sessionHandle, // Handle to open biometric session
subFactor, // Finger to create template for
unitId // Biometric unit ID
);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioEnrollBegin failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Set up the custom callback context structure.
callbackContext.SessionHandle = sessionHandle;
callbackContext.UnitId = unitId;
callbackContext.SubFactor = subFactor;// Call WinBioEnrollCaptureWithCallback. This is an asynchronous
// method that returns immediately.
hr = WinBioEnrollCaptureWithCallback(
sessionHandle, // Handle to open biometric session
EnrollCaptureCallback, // Callback function
&callbackContext // Pointer to the custom context
);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioEnrollCaptureWithCallback failed. ");
wprintf_s(L"hr = 0x%x\n", hr);
goto e_Exit;
}
wprintf_s(L"\n Swipe the sensor with the appropriate finger...\n");// Cancel the enrollment 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 enrollment process to complete
// or be canceled.
hr = WinBioWait( sessionHandle );
if (FAILED(hr))
{
wprintf_s(L"\n WinBioWait failed. hr = 0x%x\n", hr);
}// Discard the enrollment if the bDiscard flag is set.
// Commit the enrollment if the flag is not set.
if (bDiscard)
{
wprintf_s(L"\n Discarding enrollment...\n");
hr = WinBioEnrollDiscard( sessionHandle );
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensor failed. ");
wprintf_s(L"hr = 0x%x\n", hr);
}
goto e_Exit;
}
else
{
wprintf_s(L"\n Committing enrollment...\n");
hr = WinBioEnrollCommit(
sessionHandle, // Handle to open biometric session
&identity, // WINBIO_IDENTITY object for the user
&isNewTemplate); // Is this a new templateif (FAILED(hr))
{
wprintf_s(L"\n WinBioEnrollCommit failed. hr = 0x%x\n", hr);
goto e_Exit;
}
}e_Exit:
if (sessionHandle != NULL)
{
WinBioCloseSession(sessionHandle);
sessionHandle = NULL;
}wprintf_s(L"\n Press any key to exit...");
_getch();return hr;
}//------------------------------------------------------------------------
// The following function is the callback for the Windows Biometric
// Framework WinBioEnrollCaptureWithCallback() function.
//
VOID CALLBACK EnrollCaptureCallback(
__in_opt PVOID EnrollCallbackContext,
__in HRESULT OperationStatus,
__in WINBIO_REJECT_DETAIL RejectDetail
)
{
// Declare variables.
HRESULT hr = S_OK;
static SIZE_T swipeCount = 1;PENROLL_CALLBACK_CONTEXT callbackContext =
(PENROLL_CALLBACK_CONTEXT)EnrollCallbackContext;wprintf_s(L"\n EnrollCaptureCallback executing\n");
wprintf_s(L"\n Sample %d captured", swipeCount++);// The capture was not acceptable or the enrollment operation
// failed.
if (FAILED(OperationStatus))
{
if (OperationStatus == WINBIO_E_BAD_CAPTURE)
{
wprintf_s(L"\n Bad capture; reason: %d\n", RejectDetail);
wprintf_s(L"\n Swipe your finger to capture another sample.\n");// Try again.
hr = WinBioEnrollCaptureWithCallback(
callbackContext->SessionHandle, // Open session handle
EnrollCaptureCallback, // Callback function
EnrollCallbackContext // Callback context
);
if (FAILED(hr))
{
wprintf_s(L"WinBioEnrollCaptureWithCallback failed.");
wprintf_s(L"hr = 0x%x\n", hr);
}
}
else
{
wprintf_s(L"EnrollCaptureCallback failed.");
wprintf_s(L"OperationStatus = 0x%x\n", OperationStatus);
}
goto e_Exit;
}// The enrollment operation requires more fingerprint swipes.
// This is normal and depends on your hardware. Typically, at least
// three swipes are required.
if (OperationStatus == WINBIO_I_MORE_DATA)
{
wprintf_s(L"\n More data required.");
wprintf_s(L"\n Swipe your finger on the sensor again.");hr = WinBioEnrollCaptureWithCallback(
callbackContext->SessionHandle,
EnrollCaptureCallback,
EnrollCallbackContext
);
if (FAILED(hr))
{
wprintf_s(L"WinBioEnrollCaptureWithCallback failed. ");
wprintf_s(L"hr = 0x%x\n", hr);
}
goto e_Exit;
}wprintf_s(L"\n Template completed\n");
e_Exit:
return;
}查找生物识别单元
下面的代码示例演示如何查找已安装的生物识别单元。
同步定位生物识别单元
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioLocateSensor来查找生物识别单元。
若要编译此示例，请链接到 Winbio.lib 静态库并包含以下头文件：
- Windows.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT LocateSensor( )
{
HRESULT hr = S_OK;
WINBIO_SESSION_HANDLE sessionHandle = NULL;
WINBIO_UNIT_ID unitId = 0;// 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 WinBioEnumBiometricUnits failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Locate the sensor.
wprintf_s(L"\n Tap the sensor once...\n");
hr = WinBioLocateSensor( sessionHandle, &unitId);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensor failed. hr = 0x%x\n", hr);
goto e_Exit;
}
wprintf_s(L"\n Sensor located successfully. ");
wprintf_s(L"\n Unit ID = %d \n", unitId);e_Exit:
if (sessionHandle != NULL)
{
WinBioCloseSession(sessionHandle);
sessionHandle = NULL;
}wprintf_s(L"\n Hit any key to exit...");
_getch();return hr;
}异步定位生物识别单元
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioLocateSensorWithCallback来查找生物识别传感器。 这是一个异步函数，用于将生物识别子系统配置为在另一个线程上定位传感器。 生物识别子系统的输出将发送到名为 LocateSensorCallback 的自定义回调函数。
- 调用 WinBioWait待异步进程完成或取消。
若要编译此示例，请链接到 Winbio.lib 静态库并包含以下头文件：
- Windows.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT LocateSensorWithCallback(BOOL bCancel)
{
HRESULT hr = S_OK;
WINBIO_SESSION_HANDLE sessionHandle = NULL;
WINBIO_UNIT_ID unitId = 0;// 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;
}wprintf_s(L"\n Calling WinBioLocateSensorWithCallback.");
hr = WinBioLocateSensorWithCallback(
sessionHandle, // Open biometric session
LocateSensorCallback, // Callback function
NULL // Optional context
);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioLocateSensorWithCallback failed.");
wprintf_s(L"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)
{
wprintf_s(L"\n Closing the session.\n");hr = WinBioCloseSession(sessionHandle);
if (FAILED(hr))
{
wprintf_s(L"\n WinBioCloseSession failed. hr = 0x%x\n", hr);
}
sessionHandle = NULL;
}wprintf_s(L"\n Hit any key to exit...");
_getch();return hr;
}//-----------------------------------------------------------
// The following function is the callback for
// WinBioLocateSensorWithCallback. The function filters the response
// from the biometric subsystem and writes a result to the console window.
//
VOID CALLBACK LocateSensorCallback(
__in_opt PVOID LocateCallbackContext,
__in HRESULT OperationStatus,
__in WINBIO_UNIT_ID UnitId
)
{
UNREFERENCED_PARAMETER(LocateCallbackContext);wprintf_s(L"\n LocateSensorCallback executing.");
// A sensor could not be located.
if (FAILED(OperationStatus))
{
wprintf_s(L"\n LocateSensorCallback failed.");
wprintf_s(L"OperationStatus = 0x%x\n", OperationStatus);
}
// A sensor was located.
else
{
wprintf_s(L"\n Selected unit ID: %d\n", UnitId);
}
}验证用户标识
同步验证
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioVerify以确定生物识别样本是否与当前用户的登录标识匹配。
若要编译此示例，请链接到 Winbio.lib 静态库并包含以下头文件：
- Windows.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT Verify(WINBIO_BIOMETRIC_SUBTYPE subFactor)
{
HRESULT hr = S_OK;
WINBIO_SESSION_HANDLE sessionHandle = NULL;
WINBIO_UNIT_ID unitId = 0;
WINBIO_REJECT_DETAIL rejectDetail = 0;
WINBIO_IDENTITY identity = {0};
BOOLEAN match = FALSE;// 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.
wprintf_s(L"\n Calling WinBioVerify - Swipe finger on sensor...\n");
hr = WinBioVerify(
sessionHandle,
&identity,
subFactor,
&unitId,
&match,
&rejectDetail
);
wprintf_s(L"\n Swipe processed - Unit ID: %d\n", unitId);
if (FAILED(hr))
{
if (hr == WINBIO_E_NO_MATCH)
{
wprintf_s(L"\n- NO MATCH - identity verification failed.\n");
}
else if (hr == WINBIO_E_BAD_CAPTURE)
{
wprintf_s(L"\n- Bad capture; reason: %d\n", rejectDetail);
}
else
{
wprintf_s(L"\n WinBioVerify failed. hr = 0x%x\n", hr);
}
goto e_Exit;
}
wprintf_s(L"\n Fingerprint verified:\n", unitId);e_Exit:
if (sessionHandle != NULL)
{
WinBioCloseSession(sessionHandle);
sessionHandle = NULL;
}wprintf_s(L"\n Press any key to exit...");
_getch();return hr;
}//------------------------------------------------------------------------
// 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;
}异步验证
以下代码示例：
- 调用 WinBioOpenSession以打开生物识别会话并连接到系统池。
- 调用 WinBioVerifyWithCallback以确定生物识别样本是否与当前用户的登录标识匹配。 这是一个异步函数，用于配置生物识别子系统以验证另一个线程上的用户。 生物识别子系统的输出将发送到自定义回调函数，此处称为 VerifyCallback。
- 调用 WinBioWait等待异步进程完成或取消。
若要编译此示例，请链接到 Winbio.lib 静态库并包含以下头文件：
- 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;
}管理凭据
凭据提供程序和凭据管理器是Windows生物识别框架中的组件。 提供程序从安全存储中检索用户凭据，并响应登录、解锁、密码更改和 UAC 提升请求。 它还在快速用户切换期间响应以登录新用户。 管理器将登录凭据映射到生物识别标识，并安全地存储凭据。 映射通常是由第三方注册应用程序在生物识别注册期间创建的，但如果注册的用户尝试通过生物识别方式进行身份验证，或者凭据与安全存储中的凭据不匹配，则登录期间也可以由Windows生物识别凭据提供程序创建。
凭据管理器 API 指南
- 无法存储、查询或删除来宾或内置管理员帐户或任何非交互式帐户（例如 LocalSystem、LocalService 或 NetworkService）的凭据。
- 所有函数都返回 一个 HRESULT 错误代码，该错误代码可能是常见错误代码，例如 E_ACCESSDENIED 或特定于凭据管理器的错误，例如 WINBIO_E_UNKNOWN_ID。
- 如果合适，则返回E_ACCESSDENIED，然后返回更具体的错误代码，例如SEC_E_LOGON_DENIED或WINBIO_E_UNKNOWN_ID。
- 权限尚未提升的用户只能为其自己的帐户设置、查询或删除凭据。 提升的调用方可以查询凭据状态并删除其他用户的凭据。
- 所有函数都将失败并返回WINBIO_E_CRED_PROV_DISABLED：
- 当凭据提供程序未启用系统范围时，对于所有用户。
- 对于未为域使用启用提供程序的域用户。
- 添加或删除凭据时，将生成事件通知。
设置凭据
以下代码示例：
- 调用 GetCurrentUserIdentity 以检索当前用户的 WINBIO_IDENTITY对象。 GetCurrentUserIdentity 是一个帮助程序函数，不属于Windows生物识别框架。
- 调用 GetCredentials 帮助程序函数以检索包含身份验证信息的字节数组。 GetCredentials 显示一个对话框，提示用户输入凭据。
- 调用 WinBioSetCredential以在存储中保存凭据。
若要编译此函数链接到 Winbio.lib 静态库，并包含以下头文件：
- Windows.h
- Wincred.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT SetCredential()
{
// Declare variables.
HRESULT hr = S_OK;
ULONG ulAuthPackage = 0;
PVOID pvAuthBlob = NULL;
ULONG cbAuthBlob = 0;
WINBIO_IDENTITY identity;
PSID pSid = NULL;// Find the identity of the user.
wprintf_s(L"\n Finding user identity.\n");
hr = GetCurrentUserIdentity( &identity );
if (FAILED(hr))
{
wprintf_s(L"\n User identity not found. hr = 0x%x\n", hr);
return hr;
}// Set a pointer to the security descriptor for the user.
pSid = identity.Value.AccountSid.Data;// Retrieve a byte array that contains credential information.
hr = GetCredentials(pSid, &pvAuthBlob, &cbAuthBlob);
if (FAILED(hr))
{
wprintf_s(L"\n GetCredentials failed. hr = 0x%x\n", hr);
goto e_Exit;
}// Set the credentials.
hr = WinBioSetCredential(
WINBIO_CREDENTIAL_PASSWORD, // Type of credential.
(PUCHAR)pvAuthBlob, // Credentials byte array
cbAuthBlob, // Size of credentials
WINBIO_PASSWORD_PACKED); // Credentials formatif (FAILED(hr))
{
wprintf_s(L"\n WinBioSetCredential failed. hr = 0x%x\n", hr);
goto e_Exit;
}
wprintf_s(L"\n Credentials successfully set.\n");e_Exit:
// Delete the authentication byte array.
if (NULL != pvAuthBlob)
{
SecureZeroMemory(pvAuthBlob, cbAuthBlob);
CoTaskMemFree(pvAuthBlob);
pvAuthBlob = NULL;
}wprintf_s(L"\n Press any key to exit...");
_getch();return hr;
}
//------------------------------------------------------------------------
// The following function displays a dialog box to prompt a user
// for credentials.
//
HRESULT GetCredentials(PSID pSid, PVOID* ppvAuthBlob, ULONG* pcbAuthBlob)
{
HRESULT hr = S_OK;
DWORD dwResult;
WCHAR szUsername[MAX_PATH] = {0};
DWORD cchUsername = ARRAYSIZE(szUsername);
WCHAR szPassword[MAX_PATH] = {0};
WCHAR szDomain[MAX_PATH] = {0};
DWORD cchDomain = ARRAYSIZE(szDomain);
WCHAR szDomainAndUser[MAX_PATH] = {0};
DWORD cchDomainAndUser = ARRAYSIZE(szDomainAndUser);
PVOID pvInAuthBlob = NULL;
ULONG cbInAuthBlob = 0;
PVOID pvAuthBlob = NULL;
ULONG cbAuthBlob = 0;
CREDUI_INFOW ui;
ULONG ulAuthPackage = 0;
BOOL fSave = FALSE;static const WCHAR WINBIO_CREDPROV_TEST_PASSWORD_PROMPT_MESSAGE[] =
L"Enter your current password to enable biometric logon.";static const WCHAR WINBIO_CREDPROV_TEST_PASSWORD_PROMPT_CAPTION[] =
L"Biometric Log On Enrollment";if (NULL == pSid || NULL == ppvAuthBlob || NULL == pcbAuthBlob)
{
return E_INVALIDARG;
}// Retrieve the user name and domain name.
SID_NAME_USE SidUse;
DWORD cchTmpUsername = cchUsername;
DWORD cchTmpDomain = cchDomain;if (!LookupAccountSidW(
NULL, // Local computer
pSid, // Security identifier for user
szUsername, // User name
&cchTmpUsername, // Size of user name
szDomain, // Domain name
&cchTmpDomain, // Size of domain name
&SidUse)) // Account type
{
dwResult = GetLastError();
hr = HRESULT_FROM_WIN32(dwResult);
wprintf_s(L"\n LookupAccountSidLocalW failed: hr = 0x%x\n", hr);
return hr;
}// Combine the domain and user names.
swprintf_s(
szDomainAndUser,
cchDomainAndUser,
L"%s\\%s",
szDomain,
szUsername);// Call CredPackAuthenticationBufferW once to determine the size,
// in bytes, of the authentication buffer.
if (!CredPackAuthenticationBufferW(
0, // Reserved
szDomainAndUser, // Domain\User name
szPassword, // User Password
NULL, // Packed credentials
&cbInAuthBlob) // Size, in bytes, of credentials
&& GetLastError() != ERROR_INSUFFICIENT_BUFFER)
{
dwResult = GetLastError();
hr = HRESULT_FROM_WIN32(dwResult);
wprintf_s(L"\n CredPackAuthenticationBufferW (1) failed: ");
wprintf_s(L"hr = 0x%x\n", hr);
}// Allocate memory for the input buffer.
pvInAuthBlob = CoTaskMemAlloc(cbInAuthBlob);
if (!pvInAuthBlob)
{
cbInAuthBlob = 0;
wprintf_s(L"\n CoTaskMemAlloc() Out of memory.\n");
return HRESULT_FROM_WIN32(ERROR_OUTOFMEMORY);
}// Call CredPackAuthenticationBufferW again to retrieve the
// authentication buffer.
if (!CredPackAuthenticationBufferW(
0,
szDomainAndUser,
szPassword,
(PBYTE)pvInAuthBlob,
&cbInAuthBlob))
{
dwResult = GetLastError();
hr = HRESULT_FROM_WIN32(dwResult);
wprintf_s(L"\n CredPackAuthenticationBufferW (2) failed: ");
wprintf_s(L"hr = 0x%x\n", hr);
goto e_Exit;
}// Display a dialog box to request credentials.
ui.cbSize = sizeof(ui);
ui.hwndParent = GetConsoleWindow();
ui.pszMessageText = WINBIO_CREDPROV_TEST_PASSWORD_PROMPT_MESSAGE;
ui.pszCaptionText = WINBIO_CREDPROV_TEST_PASSWORD_PROMPT_CAPTION;
ui.hbmBanner = NULL;dwResult = CredUIPromptForWindowsCredentialsW(
&ui, // Customizing information
0, // Error code to display
&ulAuthPackage, // Authorization package
pvInAuthBlob, // Credential byte array
cbInAuthBlob, // Size of credential input buffer
&pvAuthBlob, // Output credential byte array
&cbAuthBlob, // Size of credential byte array
&fSave, // Select the save check box.
CREDUIWIN_IN_CRED_ONLY |
CREDUIWIN_ENUMERATE_CURRENT_USER
);
if (dwResult != NO_ERROR)
{
hr = HRESULT_FROM_WIN32(dwResult);
wprintf_s(L"\n CredUIPromptForWindowsCredentials failed: ");
wprintf_s(L"0x%08x\n", dwResult);
goto e_Exit;
}*ppvAuthBlob = pvAuthBlob;
*pcbAuthBlob = cbAuthBlob;e_Exit:
// Delete the input authentication byte array.
if (pvInAuthBlob)
{
SecureZeroMemory(pvInAuthBlob, cbInAuthBlob);
CoTaskMemFree(pvInAuthBlob);
pvInAuthBlob = NULL;
};return hr;
}//------------------------------------------------------------------------
// 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;
}删除凭据
以下代码示例：
- 调用 GetCurrentUserIdentity 以检索当前用户的 WINBIO_IDENTITY对象。 GetCurrentUserIdentity 是一个帮助程序函数，不属于Windows生物识别框架。
- 调用 WinBioRemoveCredential以从存储中删除凭据。
若要编译此函数链接到 Winbio.lib 静态库，并包含以下头文件：
- Windows.h
- Stdio.h
- Conio.h
- Winbio.h
HRESULT RemoveCredential()
{
HRESULT hr = S_OK;
WINBIO_IDENTITY identity;// Find the identity of the user.
wprintf_s(L"\n Finding user identity.\n");
hr = GetCurrentUserIdentity( &identity );
if (FAILED(hr))
{
wprintf(L"\n User identity not found. hr = 0x%x\n", hr);
goto e_Exit;
}// Remove the user credentials.
hr = WinBioRemoveCredential(identity, WINBIO_CREDENTIAL_PASSWORD);
if (FAILED(hr))
{
wprintf(L"\n WinBioRemoveCredential failed. hr = 0x%x\n", hr);
goto e_Exit;
}wprintf_s(L"\n User credentials successfully removed.\n");
e_Exit:
wprintf_s(L"\n Press any key to exit...");
_getch();return hr;
}//------------------------------------------------------------------------
// 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;
}摘自微软官网
