.\"	$OpenBSD: PKEY_USAGE_PERIOD_new.3,v 1.4 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 PKEY_USAGE_PERIOD_NEW 3
.Os
.Sh NAME
.Nm PKEY_USAGE_PERIOD_new ,
.Nm PKEY_USAGE_PERIOD_free
.Nd X.509 certificate private key usage period extension
.Sh SYNOPSIS
.In openssl/x509v3.h
.Ft PKEY_USAGE_PERIOD *
.Fn PKEY_USAGE_PERIOD_new void
.Ft void
.Fn PKEY_USAGE_PERIOD_free "PKEY_USAGE_PERIOD *period"
.Sh DESCRIPTION
.Fn PKEY_USAGE_PERIOD_new
allocates and initializes an empty
.Vt PKEY_USAGE_PERIOD
object, representing an ASN.1
.Vt PrivateKeyUsagePeriod
structure defined in RFC 3280 section 4.2.1.4.
It could be used in
.Vt X509
certificates to specify a validity period for the private key
that differed from the validity period of the certificate.
.Pp
.Fn PKEY_USAGE_PERIOD_free
frees
.Fa period .
.Sh RETURN VALUES
.Fn PKEY_USAGE_PERIOD_new
returns the new
.Vt PKEY_USAGE_PERIOD
object or
.Dv NULL
if an error occurs.
.Sh SEE ALSO
.Xr EXTENDED_KEY_USAGE_new 3 ,
.Xr X509_CINF_new 3 ,
.Xr X509_EXTENSION_new 3 ,
.Xr X509_new 3
.Sh STANDARDS
RFC 3280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile,
section 4.2.1.4: Private Key Usage Period
.Pp
RFC 3280 was obsoleted by RFC 5280, which says: "Section 4.2.1.4
in RFC 3280, which specified the
.Vt PrivateKeyUsagePeriod
certificate extension but deprecated its use, was removed.
Use of this ISO standard extension is neither deprecated
nor recommended for use in the Internet PKI."
.Sh HISTORY
.Fn PKEY_USAGE_PERIOD_new
and
.Fn PKEY_USAGE_PERIOD_free
first appeared in OpenSSL 0.9.2b and have been available since
.Ox 2.6 .