FreeBSD/Linux Kernel Cross Reference
sys/rpc/svc_auth.c
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"
37 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
38 #endif
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
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 */
73 enum 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*/
101 enum auth_stat
102 _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
103 {
104 return (AUTH_OK);
105 }
106
107 int
108 svc_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
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