.\"	$OpenBSD: d2i_ESS_SIGNING_CERT.3,v 1.1 2016/12/27 20:56:18 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.
.\"
.Dd $Mdocdate: December 27 2016 $
.Dt D2I_ESS_SIGNING_CERT 3
.Os
.Sh NAME
.Nm d2i_ESS_SIGNING_CERT ,
.Nm i2d_ESS_SIGNING_CERT ,
.Nm d2i_ESS_CERT_ID ,
.Nm i2d_ESS_CERT_ID ,
.Nm d2i_ESS_ISSUER_SERIAL ,
.Nm i2d_ESS_ISSUER_SERIAL
.Nd decode and encode signing certificates for S/MIME
.Sh SYNOPSIS
.In openssl/ts.h
.Ft ESS_SIGNING_CERT *
.Fo d2i_ESS_SIGNING_CERT
.Fa "ESS_SIGNING_CERT **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_ESS_SIGNING_CERT
.Fa "const ESS_SIGNING_CERT *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft ESS_CERT_ID *
.Fo d2i_ESS_CERT_ID
.Fa "ESS_CERT_ID **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_ESS_CERT_ID
.Fa "const ESS_CERT_ID *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft ESS_ISSUER_SERIAL *
.Fo d2i_ESS_ISSUER_SERIAL
.Fa "ESS_ISSUER_SERIAL **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_ESS_ISSUER_SERIAL
.Fa "const ESS_ISSUER_SERIAL *val_in"
.Fa "unsigned char **der_out"
.Fc
.Sh DESCRIPTION
These functions decode and encode signing certificate attribute
structures.
For details about the semantics, examples, caveats, and bugs, see
.Xr ASN1_item_d2i 3 .
.Pp
.Fn d2i_ESS_SIGNING_CERT
and
.Fn i2d_ESS_SIGNING_CERT
decode and encode an ASN.1
.Vt SigningCertificate
structure defined in RFC 2634 section 5.4.
.Pp
.Fn d2i_ESS_CERT_ID
and
.Fn i2d_ESS_CERT_ID
decode and encode an ASN.1
.Vt ESSCertID
structure defined in RFC 2634 section 5.4.1.
.Pp
.Fn d2i_ESS_ISSUER_SERIAL
and
.Fn i2d_ESS_ISSUER_SERIAL
decode and encode an ASN.1
.Vt IssuerSerial
structure defined in RFC 2634 section 5.4.1.
.Sh RETURN VALUES
.Fn d2i_ESS_SIGNING_CERT ,
.Fn d2i_ESS_CERT_ID ,
and
.Fn d2i_ESS_ISSUER_SERIAL
return an
.Vt ESS_SIGNING_CERT ,
.Vt ESS_CERT_ID ,
or
.Vt ESS_ISSUER_SERIAL
object, respectively, or
.Dv NULL
if an error occurs.
.Pp
.Fn i2d_ESS_SIGNING_CERT ,
.Fn i2d_ESS_CERT_ID ,
and
.Fn i2d_ESS_ISSUER_SERIAL
return the number of bytes successfully encoded or a negative value
if an error occurs.
.Sh SEE ALSO
.Xr ASN1_item_d2i 3 ,
.Xr ESS_SIGNING_CERT_new 3
.Sh STANDARDS
RFC 2634: Enhanced Security Services for S/MIME,
section 5: Signing Certificate Attribute