Biometric

Windows 7 and later implement support for Biometric devices. The Windows Biometric Framework (WBF) is a generic biometric architecture in Windows 7 and later versions of Windows.

WBF includes an IOCTL-based driver interface known as the Windows Biometric Driver Interface (WBDI) as well as a Windows service called the Windows Biometric Framework API (Windows) (WBS). WBS is also referred to as the WinBio service. WBDI drivers respond to requests from the WinBio service. WBF also includes Windows log-in support.

Overview of the Biometric technology.

To develop Biometric, you need these headers:

• winbio_ioctl.h
• winbio_types.h

For the programming guide, see Biometric.

IOCTLs

IOCTL_BIOMETRIC_CALIBRATE The IOCTL_BIOMETRIC_CALIBRATE IOCTL directs the driver to perform any necessary steps to calibrate the device for use.
IOCTL_BIOMETRIC_CAPTURE_DATA The IOCTL_BIOMETRIC_CAPTURE_DATA IOCTL directs the driver to retrieve the next scan of biometric data. This call should put the device into capture mode.Vendor-supplied WBDI drivers must support IOCTL_BIOMETRIC_CAPTURE_DATA.
IOCTL_BIOMETRIC_GET_ATTRIBUTES The IOCTL_BIOMETRIC_GET_ATTRIBUTES IOCTL returns a structure that contains a set of attributes for the sensor. Vendor-supplied WBDI drivers must support this IOCTL.
IOCTL_BIOMETRIC_GET_INDICATOR The IOCTL_BIOMETRIC_GET_INDICATOR IOCTL directs the driver to retrieve the status of the indicator light. This IOCTL is optional.
IOCTL_BIOMETRIC_GET_SENSOR_STATUS The IOCTL_BIOMETRIC_GET_SENSOR_STATUS IOCTL tells the driver to perform any necessary steps to collect the current operating status of the device. Vendor-supplied WBDI drivers must support this IOCTL.
IOCTL_BIOMETRIC_GET_SUPPORTED_ALGORITHMS The IOCTL_BIOMETRIC_GET_SUPPORTED_ALGORITHMS IOCTL retrieves a list of cryptographic hash algorithms that are supported by the device. This IOCTL is optional.
IOCTL_BIOMETRIC_RESET The IOCTL_BIOMETRIC_RESET IOCTL resets the device to a known or idle state, according to the current power state. Vendor-supplied WBDI drivers must support this IOCTL.
IOCTL_BIOMETRIC_SET_INDICATOR The IOCTL_BIOMETRIC_SET_INDICATOR IOCTL directs the driver to update the status of the indicator light.
IOCTL_BIOMETRIC_UPDATE_FIRMWARE The IOCTL_BIOMETRIC_UPDATE_FIRMWARE IOCTL tells the driver to update the firmware for the device with the given firmware image. This IOCTL is optional.

Structures

WINBIO_BIR The WINBIO_BIR structure is the root of the BIR (Biometric Information Record). It contains the size and offset of any other data elements in the BIR.
WINBIO_BIR_DATA The WINBIO_BIR_DATA structure contains the location and size of a block in a BIR. The offset is measured from the beginning of the WINBIO_BIR structure.
WINBIO_BIR_HEADER The WINBIO_BIR_HEADER structure contains the Common Biometric Exchange File Format (CBEFF) Patron Format A information that describes the rest of the BIR.
WINBIO_BLANK_PAYLOAD The IOCTL_BIOMETRIC_RESET and IOCTL_BIOMETRIC_UPDATE_FIRMWARE IOCTLs return the WINBIO_BLANK_PAYLOAD structure as output.
WINBIO_CALIBRATION_INFO The IOCTL_BIOMETRIC_CALIBRATE IOCTL returns the WINBIO_CALIBRATION_INFO structure as output.
WINBIO_CAPTURE_DATA The IOCTL_BIOMETRIC_CAPTURE_DATA IOCTL returns the WINBIO_CAPTURE_DATA structure as output.
WINBIO_CAPTURE_PARAMETERS The IOCTL_BIOMETRIC_CAPTURE_DATA IOCTL uses the WINBIO_CAPTURE_PARAMETERS structure as input.
WINBIO_DATA The WINBIO_DATA structure specifies data in IOCTL payloads.
WINBIO_DIAGNOSTICS The IOCTL_BIOMETRIC_GET_SENSOR_STATUS IOCTL returns the WINBIO_DIAGNOSTICS structure as output.
WINBIO_GET_INDICATOR The WINBIO_GET_INDICATOR structure is the OUT payload for IOCTL_BIOMETRIC_GET_INDICATOR.
WINBIO_REGISTERED_FORMAT The WINBIO_REGISTERED_FORMAT structure specifies a biometric data format.
WINBIO_SENSOR_ATTRIBUTES The IOCTL_BIOMETRIC_GET_ATTRIBUTES structure returns the WINBIO_SENSOR_ATTRIBUTES structure as output.
WINBIO_SET_INDICATOR The WINBIO_SET_INDICATOR structure is the IN payload for IOCTL_BIOMETRIC_SET_INDICATOR.
WINBIO_SUPPORTED_ALGORITHMS The WINBIO_SUPPORTED_ALGORITHMS structure is the OUT payload for IOCTL_BIOMETRIC_GET_SUPPORTED_ALGORITHMS.
WINBIO_UPDATE_FIRMWARE The WINBIO_UPDATE_FIRMWARE structure is the IN payload for IOCTL_BIOMETRIC_UPDATE_FIRMWARE.
WINBIO_VERSION The WINBIO_VERSION structure describes major and minor version information for a WBDI driver.