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.\" $OpenBSD: AUTHORITY_KEYID_new.3,v 1.4 2019/06/06 01:06:58 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.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: June 6 2019 $
.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 d2i_AUTHORITY_KEYID 3 ,
.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 .
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