svc_auth.c revision 177633 
1/*	$NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $	*/
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part.  Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California  94043
30 */
31/*
32 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
33 */
34
35#if defined(LIBC_SCCS) && !defined(lint)
36#ident	"@(#)svc_auth.c	1.16	94/04/24 SMI"
37static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
38#endif
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: head/sys/rpc/svc_auth.c 177633 2008-03-26 15:23:12Z dfr $");
41
42/*
43 * svc_auth.c, Server-side rpc authenticator interface.
44 *
45 */
46
47#include <sys/param.h>
48#include <sys/lock.h>
49#include <sys/mutex.h>
50#include <sys/systm.h>
51#include <sys/ucred.h>
52
53#include <rpc/rpc.h>
54
55/*
56 * The call rpc message, msg has been obtained from the wire.  The msg contains
57 * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
58 * if the msg is successfully authenticated.  If AUTH_OK then the routine also
59 * does the following things:
60 * set rqst->rq_xprt->verf to the appropriate response verifier;
61 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
62 *
63 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
64 * its length is set appropriately.
65 *
66 * The caller still owns and is responsible for msg->u.cmb.cred and
67 * msg->u.cmb.verf.  The authentication system retains ownership of
68 * rqst->rq_client_cred, the cooked credentials.
69 *
70 * There is an assumption that any flavour less than AUTH_NULL is
71 * invalid.
72 */
73enum auth_stat
74_authenticate(struct svc_req *rqst, struct rpc_msg *msg)
75{
76	int cred_flavor;
77	enum auth_stat dummy;
78
79	rqst->rq_cred = msg->rm_call.cb_cred;
80	rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
81	rqst->rq_xprt->xp_verf.oa_length = 0;
82	cred_flavor = rqst->rq_cred.oa_flavor;
83	switch (cred_flavor) {
84	case AUTH_NULL:
85		dummy = _svcauth_null(rqst, msg);
86		return (dummy);
87	case AUTH_SYS:
88		dummy = _svcauth_unix(rqst, msg);
89		return (dummy);
90	case AUTH_SHORT:
91		dummy = _svcauth_short(rqst, msg);
92		return (dummy);
93	default:
94		break;
95	}
96
97	return (AUTH_REJECTEDCRED);
98}
99
100/*ARGSUSED*/
101enum auth_stat
102_svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
103{
104	return (AUTH_OK);
105}
106
107int
108svc_getcred(struct svc_req *rqst, struct ucred *cr, int *flavorp)
109{
110	int flavor, i;
111	struct xucred *xcr;
112
113	KASSERT(!crshared(cr), ("svc_getcred with shared cred"));
114
115	flavor = rqst->rq_cred.oa_flavor;
116	if (flavorp)
117		*flavorp = flavor;
118
119	switch (flavor) {
120	case AUTH_UNIX:
121		xcr = (struct xucred *) rqst->rq_clntcred;
122		cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid;
123		cr->cr_ngroups = xcr->cr_ngroups;
124		for (i = 0; i < xcr->cr_ngroups; i++)
125			cr->cr_groups[i] = xcr->cr_groups[i];
126		cr->cr_rgid = cr->cr_groups[0];
127		return (TRUE);
128
129	default:
130		return (FALSE);
131	}
132}
133
134