fido_bio_info_new - Man Page

FIDO 2 biometric sensor information API


#include <fido.h>
#include <fido/bio.h>

fido_bio_info_t *

fido_bio_info_free(fido_bio_info_t **info_p);

fido_bio_info_type(const fido_bio_info_t *info);

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.

See Also

fido_bio_dev_get_info(3), fido_bio_enroll_new(3), fido_bio_template(3)

Referenced By


The man pages fido_bio_info_free(3), fido_bio_info_max_samples(3) and fido_bio_info_type(3) are aliases of fido_bio_info_new(3).

September 13, 2019