fido_bio_info_new
,
fido_bio_info_free
,
fido_bio_info_type
,
fido_bio_info_max_samples
—
FIDO 2 biometric sensor information API
#include <fido.h>
#include <fido/bio.h>
fido_bio_info_t *
fido_bio_info_new
(void);
void
fido_bio_info_free
(fido_bio_info_t
**info_p);
uint8_t
fido_bio_info_type
(const
fido_bio_info_t *info);
uint8_t
fido_bio_info_max_samples
(const
fido_bio_info_t *info);
Biometric sensor metadata is abstracted in libfido2 by the
fido_bio_info_t type.
The functions described in this page allow a
fido_bio_info_t type to be allocated, deallocated, and
inspected. For device operations on fido_bio_info_t,
please refer to
fido_bio_dev_get_info(3).
The fido_bio_info_new
() function returns a
pointer to a newly allocated, empty fido_bio_info_t
type. If memory cannot be allocated, NULL is returned.
The fido_bio_info_free
() function releases
the memory backing *info_p, where
*info_p must have been previously allocated by
fido_bio_info_new
(). On return,
*info_p is set to NULL. Either
info_p or *info_p may be NULL,
in which case fido_bio_info_free
() is a NOP.
The fido_bio_info_type
() function returns
the fingerprint sensor type, which is 1
for touch
sensors, and 2
for swipe sensors.
The fido_bio_info_max_samples
() function
returns the maximum number of successful samples required for
enrollment.