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+.\"     $OpenBSD: SXNET_new.3,v 1.1 2016/12/24 01:00:48 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: December 24 2016 $
+.Dt SXNET_NEW 3
+.Os
+.Sh NAME
+.Nm SXNET_new ,
+.Nm SXNET_free ,
+.Nm SXNETID_new ,
+.Nm SXNETID_free
+.Nd Thawte strong extranet X.509 extension
+.Sh SYNOPSIS
+.In openssl/x509v3.h
+.Ft SXNET *
+.Fn SXNET_new void
+.Ft void
+.Fn SXNET_free "SXNET *sxnet"
+.Ft SXNETID *
+.Fn SXNETID_new void
+.Ft void
+.Fn SXNETID_free "SXNETID *sxnetid"
+.Sh DESCRIPTION
+.Fn SXNET_new
+allocates and initializes an empty
+.Vt SXNET
+object representing a non-standard proprietary Thawte strong extranet
+X.509 extension.
+.Fn SXNET_free
+frees
+.Fa sxnet .
+.Pp
+.Fn SXNETID_new
+allocates and initializes an empty
+.Vt SXNETID
+object.
+It is used inside
+.Vt SXNET .
+.Fn SXNETID_free
+frees
+.Fa sxnetid .
+.Sh RETURN VALUES
+.Fn SXNET_new
+and
+.Fn SXNETID_new
+return the new
+.Vt SXNET
+or
+.Vt SXNETID
+object, respectively, or
+.Dv NULL
+if an error occurs.
+.Sh SEE ALSO
+.Xr X509_EXTENSION_new 3 ,
+.Xr X509_new 3
+.Rs
+.%A M. Shuttleworth
+.%R The Strong Extranet: real-world personal certification
+.%Q Thawte Consulting
+.%C South Africa
+.%D 1998
+.Re
+.Sh BUGS
+This manual page does not explain what the extension actually does
+because no authoritative information was found online so far.
+.Pp
+The only hint was found in an ancient white paper "Securing IBM
+Applications with Public Key Infrastructure" on the IBM website,
+dated June 13, 2001: "Thawte also has a technology called Strong
+Extranet that allows institutions to encode customer information
+in the extensions to their customer's certificates.
+Because multiple institutions can add information, the user needs
+only one certificate, making renewal and revocation simpler, although
+the issue of modifying an extension to an existing certificate is
+not addressed."
+.Pp
+It is unclear whether that explanation is accurate, but in any case,
+it is not very specific.