.\"	$OpenBSD: AUTHORITY_KEYID_new.3,v 1.3 2018/03/21 16:09:51 schwarze Exp $
.\"
.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
.\"
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.\" 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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.Dd $Mdocdate: March 21 2018 $
.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
.Sh HISTORY
.Fn AUTHORITY_KEYID_new
and
.Fn AUTHORITY_KEYID_free
first appeared in OpenSSL 0.9.2b and have been available since
.Ox 2.6 .