.\"	$OpenBSD: AUTHORITY_KEYID_new.3,v 1.2 2016/12/25 22:15:10 schwarze Exp $
.\"
.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.Dd $Mdocdate: December 25 2016 $
.Dt AUTHORITY_KEYID_NEW 3
.Os
.Sh NAME
.Nm AUTHORITY_KEYID_new ,
.Nm AUTHORITY_KEYID_free
.Nd X.509 authority key identifier extension
.Sh SYNOPSIS
.In openssl/x509v3.h
.Ft AUTHORITY_KEYID *
.Fn AUTHORITY_KEYID_new void
.Ft void
.Fn AUTHORITY_KEYID_free "AUTHORITY_KEYID *id"
.Sh DESCRIPTION
Using the authority key identifier extension, an X.509 certificate
or certificate revocation list can specify which key pair was used
for signing it.
.Pp
.Fn AUTHORITY_KEYID_new
allocates and initializes an empty
.Vt AUTHORITY_KEYID
object, representing an ASN.1
.Vt AuthorityKeyIdentifier
structure defined in RFC 5280 section 4.2.1.1.
It can hold an issuer name, a serial number, and a key identifier.
.Pp
.Fn AUTHORITY_KEYID_free
frees
.Fa id .
.Sh RETURN VALUES
.Fn AUTHORITY_KEYID_new
returns the new
.Vt AUTHORITY_KEYID
object or
.Dv NULL
if an error occurs.
.Sh SEE ALSO
.Xr GENERAL_NAMES_new 3 ,
.Xr X509_CRL_new 3 ,
.Xr X509_EXTENSION_new 3 ,
.Xr X509_new 3
.Sh STANDARDS
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile:
.Bl -dash -compact
.It
section 4.2.1.1: Certificate Extensions: Authority Key Identifier
.It
section 5.2.1: CRL Extensions: Authority Key Identifier
.El