| FIDO_DEV_GET_TOUCH_BEGIN(3) | FreeBSD Library Functions Manual | FIDO_DEV_GET_TOUCH_BEGIN(3) |
fido_dev_get_touch_begin,
fido_dev_get_touch_status —
asynchronously wait for touch on a FIDO2
authenticator
#include
<fido.h>
int
fido_dev_get_touch_begin(fido_dev_t
*dev);
int
fido_dev_get_touch_status(fido_dev_t
*dev, int *touched,
int ms);
The functions described in this page allow an application to asynchronously wait for touch on a FIDO2 authenticator. This is useful when multiple authenticators are present and the application needs to know which one to use.
The
fido_dev_get_touch_begin()
function initiates a touch request on dev.
The
fido_dev_get_touch_status()
function continues an ongoing touch request on dev,
blocking up to ms milliseconds. On success,
touched will be updated to reflect the touch request
status. If touched is 1, the device was touched, and
the touch request is terminated. If touched is 0, the
application may call fido_dev_get_touch_status() to
continue the touch request, or
fido_dev_cancel()
to terminate it.
The error codes returned by
fido_dev_get_touch_begin() and
fido_dev_get_touch_status() are defined in
<fido/err.h>. On success,
FIDO_OK is returned.
Please refer to examples/select.c in libfido2's source tree.
The fido_dev_get_touch_status() function
will cause a command to be transmitted to U2F authenticators. These
transmissions should not exceed a frequency of 5Hz.
| August 5, 2020 | Yubico AB |