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.\" $OpenBSD: d2i_PROXY_POLICY.3,v 1.2 2018/03/22 22:07:12 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: March 22 2018 $
.Dt D2I_PROXY_POLICY 3
.Os
.Sh NAME
.Nm d2i_PROXY_POLICY ,
.Nm i2d_PROXY_POLICY ,
.Nm d2i_PROXY_CERT_INFO_EXTENSION ,
.Nm i2d_PROXY_CERT_INFO_EXTENSION
.Nd decode and encode X.509 proxy certificate extensions
.Sh SYNOPSIS
.In openssl/x509v3.h
.Ft PROXY_POLICY *
.Fo d2i_PROXY_POLICY
.Fa "PROXY_POLICY **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PROXY_POLICY
.Fa "PROXY_POLICY *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft PROXY_CERT_INFO_EXTENSION *
.Fo d2i_PROXY_CERT_INFO_EXTENSION
.Fa "PROXY_CERT_INFO_EXTENSION **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_PROXY_CERT_INFO_EXTENSION
.Fa "PROXY_CERT_INFO_EXTENSION *val_in"
.Fa "unsigned char **der_out"
.Fc
.Sh DESCRIPTION
These functions encode and decode X.509 extensions that decide
whether a certificate is a proxy certificate, and which policies
apply to it.
For details about the semantics, examples, caveats, and bugs, see
.Xr ASN1_item_d2i 3 .
.Pp
.Fn d2i_PROXY_POLICY
and
.Fn i2d_PROXY_POLICY
decode and encode an ASN.1
.Vt ProxyPolicy
structure defined in RFC 3820 section 3.8.
.Pp
.Fn d2i_PROXY_CERT_INFO_EXTENSION
and
.Fn i2d_PROXY_CERT_INFO_EXTENSION
decode and encode an ASN.1
.Vt ProxyCertInfo
structure defined in RFC 3820 section 3.8.
.Sh RETURN VALUES
.Fn d2i_PROXY_POLICY
and
.Fn d2i_PROXY_CERT_INFO_EXTENSION
return a
.Vt PROXY_POLICY
or
.Vt PROXY_CERT_INFO_EXTENSION
object, respectively, or
.Dv NULL
if an error occurs.
.Pp
.Fn i2d_PROXY_POLICY
and
.Fn i2d_PROXY_CERT_INFO_EXTENSION
return the number of bytes successfully encoded or a negative value
if an error occurs.
.Sh SEE ALSO
.Xr ASN1_item_d2i 3 ,
.Xr PROXY_POLICY_new 3 ,
.Xr X509_EXTENSION_new 3
.Sh STANDARDS
RFC 3820: Internet X.509 Public Key Infrastructure (PKI) Proxy
Certificate Profile
.Sh HISTORY
These functions first appeared in OpenSSL 0.9.7g
and have been available since
.Ox 3.8 .
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