fido_bio_info_new,
fido_bio_info_free,
fido_bio_info_type,
fido_bio_info_max_samples —
FIDO2 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.
fido_bio_dev_get_info(3),
fido_bio_enroll_new(3),
fido_bio_template(3)