NAME¶

fido_bio_enroll_new, fido_bio_enroll_free, fido_bio_enroll_last_status, fido_bio_enroll_remaining_samples — FIDO2 biometric enrollment API

SYNOPSIS¶

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

#define FIDO_BIO_ENROLL_FP_GOOD				0x00
#define FIDO_BIO_ENROLL_FP_TOO_HIGH			0x01
#define FIDO_BIO_ENROLL_FP_TOO_LOW			0x02
#define FIDO_BIO_ENROLL_FP_TOO_LEFT			0x03
#define FIDO_BIO_ENROLL_FP_TOO_RIGHT			0x04
#define FIDO_BIO_ENROLL_FP_TOO_FAST			0x05
#define FIDO_BIO_ENROLL_FP_TOO_SLOW			0x06
#define FIDO_BIO_ENROLL_FP_POOR_QUALITY			0x07
#define FIDO_BIO_ENROLL_FP_TOO_SKEWED			0x08
#define FIDO_BIO_ENROLL_FP_TOO_SHORT			0x09
#define FIDO_BIO_ENROLL_FP_MERGE_FAILURE		0x0a
#define FIDO_BIO_ENROLL_FP_EXISTS			0x0b
#define FIDO_BIO_ENROLL_FP_DATABASE_FULL		0x0c
#define FIDO_BIO_ENROLL_NO_USER_ACTIVITY		0x0d
#define FIDO_BIO_ENROLL_NO_USER_PRESENCE_TRANSITION	0x0e

void
fido_bio_enroll_free(fido_bio_enroll_t **enroll_p);

uint8_t
fido_bio_enroll_last_status(const fido_bio_enroll_t *enroll);

uint8_t
fido_bio_enroll_remaining_samples(const fido_bio_enroll_t *enroll);

DESCRIPTION¶

Ongoing FIDO2 biometric enrollments are abstracted in libfido2 by the fido_bio_enroll_t type.

The functions described in this page allow a fido_bio_enroll_t type to be allocated, deallocated, and inspected. For device operations on fido_bio_enroll_t, please refer to fido_bio_dev_get_info(3).

The fido_bio_enroll_new() function returns a pointer to a newly allocated, empty fido_bio_enroll_t type. If memory cannot be allocated, NULL is returned.

The fido_bio_enroll_free() function releases the memory backing *enroll_p, where *enroll_p must have been previously allocated by fido_bio_enroll_new(). On return, *enroll_p is set to NULL. Either enroll_p or *enroll_p may be NULL, in which case fido_bio_enroll_free() is a NOP.

The fido_bio_enroll_last_status() function returns the enrollment status of enroll.

The fido_bio_enroll_remaining_samples() function returns the number of samples left for enroll to complete.

SEE ALSO¶

fido_bio_dev_get_info(3), fido_bio_template(3)