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/* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* svc_auth.c, Server-side rpc authenticator interface.
*
*/
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/jail.h>
#include <sys/ucred.h>
#include <rpc/rpc.h>
static enum auth_stat (*_svcauth_rpcsec_gss)(struct svc_req *,
struct rpc_msg *) = NULL;
static int (*_svcauth_rpcsec_gss_getcred)(struct svc_req *,
struct ucred **, int *);
static struct svc_auth_ops svc_auth_null_ops;
/*
* The call rpc message, msg has been obtained from the wire. The msg contains
* the raw form of credentials and verifiers. authenticate returns AUTH_OK
* if the msg is successfully authenticated. If AUTH_OK then the routine also
* does the following things:
* set rqst->rq_xprt->verf to the appropriate response verifier;
* sets rqst->rq_client_cred to the "cooked" form of the credentials.
*
* NB: rqst->rq_cxprt->verf must be pre-alloctaed;
* its length is set appropriately.
*
* The caller still owns and is responsible for msg->u.cmb.cred and
* msg->u.cmb.verf. The authentication system retains ownership of
* rqst->rq_client_cred, the cooked credentials.
*
* There is an assumption that any flavour less than AUTH_NULL is
* invalid.
*/
enum auth_stat
_authenticate(struct svc_req *rqst, struct rpc_msg *msg)
{
int cred_flavor;
enum auth_stat dummy;
rqst->rq_cred = msg->rm_call.cb_cred;
rqst->rq_auth.svc_ah_ops = &svc_auth_null_ops;
rqst->rq_auth.svc_ah_private = NULL;
cred_flavor = rqst->rq_cred.oa_flavor;
switch (cred_flavor) {
case AUTH_NULL:
dummy = _svcauth_null(rqst, msg);
return (dummy);
case AUTH_SYS:
dummy = _svcauth_unix(rqst, msg);
return (dummy);
case AUTH_SHORT:
dummy = _svcauth_short(rqst, msg);
return (dummy);
case RPCSEC_GSS:
if (!_svcauth_rpcsec_gss)
return (AUTH_REJECTEDCRED);
dummy = _svcauth_rpcsec_gss(rqst, msg);
return (dummy);
default:
break;
}
return (AUTH_REJECTEDCRED);
}
/*
* A set of null auth methods used by any authentication protocols
* that don't need to inspect or modify the message body.
*/
static bool_t
svcauth_null_wrap(SVCAUTH *auth, struct mbuf **mp)
{
return (TRUE);
}
static bool_t
svcauth_null_unwrap(SVCAUTH *auth, struct mbuf **mp)
{
return (TRUE);
}
static void
svcauth_null_release(SVCAUTH *auth)
{
}
static struct svc_auth_ops svc_auth_null_ops = {
svcauth_null_wrap,
svcauth_null_unwrap,
svcauth_null_release,
};
/*ARGSUSED*/
enum auth_stat
_svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
{
rqst->rq_verf = _null_auth;
return (AUTH_OK);
}
int
svc_auth_reg(int flavor,
enum auth_stat (*svcauth)(struct svc_req *, struct rpc_msg *),
int (*getcred)(struct svc_req *, struct ucred **, int *))
{
if (flavor == RPCSEC_GSS) {
_svcauth_rpcsec_gss = svcauth;
_svcauth_rpcsec_gss_getcred = getcred;
}
return (TRUE);
}
int
svc_getcred(struct svc_req *rqst, struct ucred **crp, int *flavorp)
{
struct ucred *cr = NULL;
int flavor;
struct xucred *xcr;
flavor = rqst->rq_cred.oa_flavor;
if (flavorp)
*flavorp = flavor;
switch (flavor) {
case AUTH_UNIX:
xcr = (struct xucred *) rqst->rq_clntcred;
cr = crget();
cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid;
crsetgroups(cr, xcr->cr_ngroups, xcr->cr_groups);
cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0];
cr->cr_prison = &prison0;
prison_hold(cr->cr_prison);
*crp = cr;
return (TRUE);
case RPCSEC_GSS:
if (!_svcauth_rpcsec_gss_getcred)
return (FALSE);
return (_svcauth_rpcsec_gss_getcred(rqst, crp, flavorp));
default:
return (FALSE);
}
}
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