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.\" Copyright (c) 2019 Yubico AB. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions are
.\" met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
.\" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
.\" HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
.\" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
.\" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" SPDX-License-Identifier: BSD-2-Clause
.\"
.Dd $Mdocdate: September 13 2019 $
.Dt FIDO_BIO_ENROLL_NEW 3
.Os
.Sh NAME
.Nm fido_bio_enroll_new ,
.Nm fido_bio_enroll_free ,
.Nm fido_bio_enroll_last_status ,
.Nm fido_bio_enroll_remaining_samples
.Nd FIDO2 biometric enrollment API
.Sh SYNOPSIS
.In fido.h
.In fido/bio.h
.Bd -literal
#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
.Ed
.Ft fido_bio_enroll_t *
.Fn fido_bio_enroll_new "void"
.Ft void
.Fn fido_bio_enroll_free "fido_bio_enroll_t **enroll_p"
.Ft uint8_t
.Fn fido_bio_enroll_last_status "const fido_bio_enroll_t *enroll"
.Ft uint8_t
.Fn fido_bio_enroll_remaining_samples "const fido_bio_enroll_t *enroll"
.Sh DESCRIPTION
Ongoing FIDO2 biometric enrollments are abstracted in
.Em libfido2
by the
.Vt fido_bio_enroll_t
type.
.Pp
The functions described in this page allow a
.Vt fido_bio_enroll_t
type to be allocated, deallocated, and inspected.
For device operations on
.Vt fido_bio_enroll_t ,
please refer to
.Xr fido_bio_dev_get_info 3 .
.Pp
The
.Fn fido_bio_enroll_new
function returns a pointer to a newly allocated, empty
.Vt fido_bio_enroll_t
type.
If memory cannot be allocated, NULL is returned.
.Pp
The
.Fn fido_bio_enroll_free
function releases the memory backing
.Fa *enroll_p ,
where
.Fa *enroll_p
must have been previously allocated by
.Fn fido_bio_enroll_new .
On return,
.Fa *enroll_p
is set to NULL.
Either
.Fa enroll_p
or
.Fa *enroll_p
may be NULL, in which case
.Fn fido_bio_enroll_free
is a NOP.
.Pp
The
.Fn fido_bio_enroll_last_status
function returns the enrollment status of
.Fa enroll .
.Pp
The
.Fn fido_bio_enroll_remaining_samples
function returns the number of samples left for
.Fa enroll
to complete.
.Sh SEE ALSO
.Xr fido_bio_dev_get_info 3 ,
.Xr fido_bio_template 3
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