.\"	$NetBSD: krb524_convert_creds_kdc.3,v 1.4 2017/01/28 21:31:49 christos Exp $
.\"
.\" Copyright (c) 2004 Kungliga Tekniska Högskolan
.\" (Royal Institute of Technology, Stockholm, Sweden).
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" 3. Neither the name of the Institute nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" Id
.\"
.Dd March 20, 2004
.Dt KRB524_CONVERT_CREDS_KDC 3
.Os
.Sh NAME
.Nm krb524_convert_creds_kdc ,
.Nm krb524_convert_creds_kdc_ccache
.Nd converts Kerberos 5 credentials to Kerberos 4 credentials
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.In krb5/krb5.h
.Ft krb5_error_code
.Fo krb524_convert_creds_kdc
.Fa "krb5_context context"
.Fa "krb5_creds *in_cred"
.Fa "struct credentials *v4creds"
.Fc
.Ft krb5_error_code
.Fo krb524_convert_creds_kdc_ccache
.Fa "krb5_context context"
.Fa "krb5_ccache ccache"
.Fa "krb5_creds *in_cred"
.Fa "struct credentials *v4creds"
.Fc
.Sh DESCRIPTION
Convert the Kerberos 5 credential to Kerberos 4 credential.
This is done by sending them to the 524 service in the KDC.
.Pp
.Fn krb524_convert_creds_kdc
converts the Kerberos 5 credential in
.Fa in_cred
to Kerberos 4 credential that is stored in
.Fa credentials .
.Pp
.Fn krb524_convert_creds_kdc_ccache
is different from
.Fn krb524_convert_creds_kdc
in that way that if
.Fa in_cred
doesn't contain a DES session key, then a new one is fetched from the
KDC and stored in the cred cache
.Fa ccache ,
and then the KDC is queried to convert the credential.
.Pp
This interfaces are used to make the migration to Kerberos 5 from
Kerberos 4 easier.
There are few services that still need Kerberos 4, and this is mainly
for compatibility for those services.
Some services, like AFS, really have Kerberos 5 supports, but still
uses the 524 interface to make the migration easier.
.Sh SEE ALSO
.Xr krb5 3 ,
.Xr krb5.conf 5