.\"	$OpenBSD: DIST_POINT_new.3,v 1.4 2018/03/23 04:34:23 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
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.Dd $Mdocdate: March 23 2018 $
.Dt DIST_POINT_NEW 3
.Os
.Sh NAME
.Nm DIST_POINT_new ,
.Nm DIST_POINT_free ,
.Nm CRL_DIST_POINTS_new ,
.Nm CRL_DIST_POINTS_free ,
.Nm DIST_POINT_NAME_new ,
.Nm DIST_POINT_NAME_free ,
.Nm ISSUING_DIST_POINT_new ,
.Nm ISSUING_DIST_POINT_free
.Nd X.509 CRL distribution point extensions
.Sh SYNOPSIS
.In openssl/x509v3.h
.Ft DIST_POINT *
.Fn DIST_POINT_new void
.Ft void
.Fn DIST_POINT_free "DIST_POINT *dp"
.Ft CRL_DIST_POINTS *
.Fn CRL_DIST_POINTS_new void
.Ft void
.Fn CRL_DIST_POINTS_free "CRL_DIST_POINTS *dps"
.Ft DIST_POINT_NAME *
.Fn DIST_POINT_NAME_new void
.Ft void
.Fn DIST_POINT_NAME_free "DIST_POINT_NAME *name"
.Ft ISSUING_DIST_POINT *
.Fn ISSUING_DIST_POINT_new void
.Ft void
.Fn ISSUING_DIST_POINT_free "ISSUING_DIST_POINT *dp"
.Sh DESCRIPTION
Using the CRL distribution point extension, a certificate can specify
where to obtain certificate revocation lists that might later revoke it.
.Pp
.Fn DIST_POINT_new
allocates and initializes an empty
.Vt DIST_POINT
object, representing an ASN.1
.Vt DistributionPoint
structure defined in RFC 5280 section 4.2.1.13.
It can hold issuer names, distribution point names, and reason flags.
.Fn DIST_POINT_free
frees
.Fa dp .
.Pp
.Fn CRL_DIST_POINTS_new
allocates and initializes an empty
.Vt CRL_DIST_POINTS
object, which is a
.Vt STACK_OF(DIST_POINT)
and represents the ASN.1
.Vt CRLDistributionPoints
structure defined in RFC 5280 section 4.2.1.13.
It can be used as an extension in
.Vt X509
and in
.Vt X509_CRL
objects.
.Fn CRL_DIST_POINTS_free
frees
.Fa dps .
.Pp
.Fn DIST_POINT_NAME_new
allocates and initializes an empty
.Vt DIST_POINT_NAME
object, representing an ASN.1
.Vt DistributionPointName
structure defined in RFC 5280 section 4.2.1.13.
It is used by the
.Vt DIST_POINT
and
.Vt ISSUING_DIST_POINT
objects and can hold multiple names, each representing a different
way to obtain the same CRL.
.Fn DIST_POINT_NAME_free
frees
.Fa name .
.Pp
.Fn ISSUING_DIST_POINT_new
allocates and initializes an empty
.Vt ISSUING_DIST_POINT
object, representing an ASN.1
.Vt IssuingDistributionPoint
structure defined in RFC 5280 section 5.2.5.
Using this extension, a CRL can specify which distribution point
it was issued from and which kinds of certificates and revocation
reasons it covers.
.Fn ISSUING_DIST_POINT_free
frees
.Fa dp .
.Sh RETURN VALUES
.Fn DIST_POINT_new ,
.Fn CRL_DIST_POINTS_new ,
.Fn DIST_POINT_NAME_new ,
and
.Fn ISSUING_DIST_POINT_new
return the new
.Vt DIST_POINT ,
.Vt CRL_DIST_POINTS ,
.Vt DIST_POINT_NAME ,
or
.Vt ISSUING_DIST_POINT
object, respectively, 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_NAME_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 4.2.1.13: CRL Distribution Points
.It
section 5.2.5: Issuing Distribution Point
.El
.Sh HISTORY
.Fn DIST_POINT_new ,
.Fn DIST_POINT_free ,
.Fn CRL_DIST_POINTS_new ,
.Fn CRL_DIST_POINTS_free ,
.Fn DIST_POINT_NAME_new ,
and
.Fn DIST_POINT_NAME_free
first appeared in OpenSSL 0.9.3 and have been available since
.Ox 2.6 .
.Pp
.Fn ISSUING_DIST_POINT_new
and
.Fn ISSUING_DIST_POINT_free
first appeared in OpenSSL 1.0.0 and have been available since
.Ox 4.9 .