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/*
* 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
*/
/*
* svc_auth_unix.c
* Handles UNIX flavor authentication parameters on the service side of rpc.
* There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
* _svcauth_unix does full blown unix style uid,gid+gids auth,
* _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
* Note: the shorthand has been gutted for efficiency.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#define xdrmem_create __xdrmem_create
#define __FORCE_GLIBC
#define _GNU_SOURCE
#include <features.h>
#include <stdio.h>
#include <string.h>
#include <rpc/rpc.h>
#include <rpc/svc.h>
/*
* Unix longhand authenticator
*/
enum auth_stat
_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
{
enum auth_stat stat;
XDR xdrs;
struct authunix_parms *aup;
int32_t *buf;
struct area
{
struct authunix_parms area_aup;
char area_machname[MAX_MACHINE_NAME + 1];
gid_t area_gids[NGRPS];
}
*area;
u_int auth_len;
u_int str_len, gid_len;
u_int i;
area = (struct area *) rqst->rq_clntcred;
aup = &area->area_aup;
aup->aup_machname = area->area_machname;
aup->aup_gids = area->area_gids;
auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE);
buf = XDR_INLINE (&xdrs, auth_len);
if (buf != NULL)
{
aup->aup_time = IXDR_GET_LONG (buf);
str_len = IXDR_GET_U_INT32 (buf);
if (str_len > MAX_MACHINE_NAME)
{
stat = AUTH_BADCRED;
goto done;
}
__memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
aup->aup_machname[str_len] = 0;
str_len = RNDUP (str_len);
buf = (int32_t *) ((char *) buf + str_len);
aup->aup_uid = IXDR_GET_LONG (buf);
aup->aup_gid = IXDR_GET_LONG (buf);
gid_len = IXDR_GET_U_INT32 (buf);
if (gid_len > NGRPS)
{
stat = AUTH_BADCRED;
goto done;
}
aup->aup_len = gid_len;
for (i = 0; i < gid_len; i++)
{
aup->aup_gids[i] = IXDR_GET_LONG (buf);
}
/*
* five is the smallest unix credentials structure -
* timestamp, hostname len (0), uid, gid, and gids len (0).
*/
if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
{
(void) printf ("bad auth_len gid %d str %d auth %d\n",
gid_len, str_len, auth_len);
stat = AUTH_BADCRED;
goto done;
}
}
else if (!xdr_authunix_parms (&xdrs, aup))
{
xdrs.x_op = XDR_FREE;
(void) xdr_authunix_parms (&xdrs, aup);
stat = AUTH_BADCRED;
goto done;
}
/* get the verifier */
if ((u_int)msg->rm_call.cb_verf.oa_length)
{
rqst->rq_xprt->xp_verf.oa_flavor =
msg->rm_call.cb_verf.oa_flavor;
rqst->rq_xprt->xp_verf.oa_base =
msg->rm_call.cb_verf.oa_base;
rqst->rq_xprt->xp_verf.oa_length =
msg->rm_call.cb_verf.oa_length;
}
else
{
rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
rqst->rq_xprt->xp_verf.oa_length = 0;
}
stat = AUTH_OK;
done:
XDR_DESTROY (&xdrs);
return stat;
}
/*
* Shorthand unix authenticator
* Looks up longhand in a cache.
*/
/*ARGSUSED */
enum auth_stat
_svcauth_short (struct svc_req *rqst, struct rpc_msg *msg)
{
return AUTH_REJECTEDCRED;
}
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