/*
* 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.
*/
/* #ident "@(#)svc_auth.c 1.16 94/04/24 SMI" */
#if !defined(lint) && defined(SCCSIDS)
#if 0
static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
#else
static const char rcsid[] =
"$FreeBSD: src/lib/libc/rpc/svc_auth.c,v 1.7 1999/12/29 05:04:16 peter Exp $";
#endif
#endif
/*
* svc_auth.c, Server-side rpc authenticator interface.
*
*/
#ifdef _KERNEL
#include <sys/param.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#include <rpc/clnt.h>
#include <rpc/rpc_msg.h>
#include <rpc/svc.h>
#include <rpc/svc_auth.h>
#else
#include <stdlib.h>
#include <rpc/rpc.h>
#endif
#include <sys/types.h>
/*
* svcauthsw is the bdevsw of server side authentication.
*
* Server side authenticators are called from authenticate by
* using the client auth struct flavor field to index into svcauthsw.
* The server auth flavors must implement a routine that looks
* like:
*
* enum auth_stat
* flavorx_auth(rqst, msg)
* register struct svc_req *rqst;
* register struct rpc_msg *msg;
*
*/
enum auth_stat _svcauth_null(); /* no authentication */
enum auth_stat _svcauth_unix(); /* (system) unix style (uid, gids) */
enum auth_stat _svcauth_short(); /* short hand unix style */
enum auth_stat _svcauth_des(); /* des style */
/* declarations to allow servers to specify new authentication flavors */
struct authsvc {
int flavor;
enum auth_stat (*handler)();
struct authsvc *next;
};
#define Auths ((struct authsvc *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_auths_Auths)
/*
* 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(rqst, msg)
register struct svc_req *rqst;
struct rpc_msg *msg;
{
register int cred_flavor;
register struct authsvc *asp;
rqst->rq_cred = msg->rm_call.cb_cred;
rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
rqst->rq_xprt->xp_verf.oa_length = 0;
cred_flavor = rqst->rq_cred.oa_flavor;
switch (cred_flavor) {
case AUTH_NULL:
return(_svcauth_null(rqst, msg));
case AUTH_UNIX:
return(_svcauth_unix(rqst, msg));
case AUTH_SHORT:
return(_svcauth_short(rqst, msg));
/*
* We leave AUTH_DES turned off by default because svcauth_des()
* needs getpublickey(), which is in librpcsvc, not libc. If we
* included AUTH_DES as a built-in flavor, programs that don't
* have -lrpcsvc in their Makefiles wouldn't link correctly, even
* though they don't use AUTH_DES. And I'm too lazy to go through
* the tree looking for all of them.
*/
#ifdef DES_BUILTIN
case AUTH_DES:
return(_svcauth_des(rqst, msg));
#endif
}
/* flavor doesn't match any of the builtin types, so try new ones */
for (asp = Auths; asp; asp = asp->next) {
if (asp->flavor == cred_flavor) {
enum auth_stat as;
as = (*asp->handler)(rqst, msg);
return (as);
}
}
return (AUTH_REJECTEDCRED);
}
/*ARGSUSED*/
enum auth_stat
_svcauth_null(rqst, msg)
struct svc_req *rqst;
struct rpc_msg *msg;
{
return (AUTH_OK);
}
/*
* Allow the rpc service to register new authentication types that it is
* prepared to handle. When an authentication flavor is registered,
* the flavor is checked against already registered values. If not
* registered, then a new Auths entry is added on the list.
*
* There is no provision to delete a registration once registered.
*
* This routine returns:
* 0 if registration successful
* 1 if flavor already registered
* -1 if can't register (errno set)
*/
int
svc_auth_reg(cred_flavor, handler)
register int cred_flavor;
enum auth_stat (*handler)();
{
register struct authsvc *asp;
switch (cred_flavor) {
case AUTH_NULL:
case AUTH_UNIX:
case AUTH_SHORT:
#ifdef DES_BUILTIN
case AUTH_DES:
#endif
/* already registered */
return (1);
default:
for (asp = Auths; asp; asp = asp->next) {
if (asp->flavor == cred_flavor) {
/* already registered */
return (1);
}
}
/* this is a new one, so go ahead and register it */
asp = (struct authsvc *)mem_alloc(sizeof (*asp));
if (asp == NULL) {
return (-1);
}
asp->flavor = cred_flavor;
asp->handler = handler;
asp->next = Auths;
Auths = asp;
break;
}
return (0);
}
