FIDO_BIO_TEMPLATE(3)

NAME
fido_bio_template, fido_bio_template_array_count, fido_bio_template_array_free, fido_bio_template_array_new, fido_bio_template_free, fido_bio_template_id_len, fido_bio_template_id_ptr, fido_bio_template_name, fido_bio_template_new, fido_bio_template_set_id, fido_bio_template_set_name - FIDO 2 biometric template API

SYNOPSIS
#include <fido.h>
#include <fido/bio.h>
fido_bio_template_t *
fido_bio_template_new(void);
void
fido_bio_template_free(fido_bio_template_t **template_p);
const char *
fido_bio_template_name(const fido_bio_template_t *template);
const unsigned char *
fido_bio_template_id_ptr(const fido_bio_template_t *template);
size_t
fido_bio_template_id_len(const fido_bio_template_t *template);
int
fido_bio_template_set_id(fido_bio_template_t *template, const unsigned char *ptr, size_t len);
int
fido_bio_template_set_name(fido_bio_template_t *template, const char *name);
fido_bio_template_array_t *
fido_bio_template_array_new(void);
void
fido_bio_template_array_free(fido_bio_template_array_t **template_array_p);
size_t
fido_bio_template_array_count(const fido_bio_template_array_t *template_array);
const fido_bio_template_t *
fido_bio_template(const fido_bio_template_array_t *template_array, size_t idx);

DESCRIPTION
Existing FIDO 2 biometric enrollments are abstracted in libfido2 by the fido_bio_template_t and fido_bio_template_array_t types.

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

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

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

The fido_bio_template_name() function returns a pointer to a NUL-terminated string containing the friendly name of template, or NULL if template does not have a friendly name set.

The fido_bio_template_id_ptr() function returns a pointer to the template id of template, or NULL if template does not have an id. The corresponding length can be obtained by fido_bio_template_id_len().

The fido_bio_template_set_name() function sets the friendly name of template to name. If name is NULL, the friendly name of template is unset.

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

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

The fido_bio_template_array_count() function returns the number of templates in template_array.

The fido_bio_template() function returns a pointer to the template at index idx in template_array. Please note that the first template in template_array has an idx (index) value of 0.

SEE ALSO
fido_bio_dev_get_info(3), fido_bio_enroll_new(3)