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: src/sys/rpc/svc_auth.c,v 1.2 2008/11/03 10:38:00 dfr Exp $");
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 static enum auth_stat (*_svcauth_rpcsec_gss)(struct svc_req *,
56 struct rpc_msg *) = NULL;
57 static int (*_svcauth_rpcsec_gss_getcred)(struct svc_req *,
58 struct ucred **, int *);
59
60 static struct svc_auth_ops svc_auth_null_ops;
61
62 /*
63 * The call rpc message, msg has been obtained from the wire. The msg contains
64 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
65 * if the msg is successfully authenticated. If AUTH_OK then the routine also
66 * does the following things:
67 * set rqst->rq_xprt->verf to the appropriate response verifier;
68 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
69 *
70 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
71 * its length is set appropriately.
72 *
73 * The caller still owns and is responsible for msg->u.cmb.cred and
74 * msg->u.cmb.verf. The authentication system retains ownership of
75 * rqst->rq_client_cred, the cooked credentials.
76 *
77 * There is an assumption that any flavour less than AUTH_NULL is
78 * invalid.
79 */
80 enum auth_stat
81 _authenticate(struct svc_req *rqst, struct rpc_msg *msg)
82 {
83 int cred_flavor;
84 enum auth_stat dummy;
85
86 rqst->rq_cred = msg->rm_call.cb_cred;
87 rqst->rq_auth.svc_ah_ops = &svc_auth_null_ops;
88 rqst->rq_auth.svc_ah_private = NULL;
89 cred_flavor = rqst->rq_cred.oa_flavor;
90 switch (cred_flavor) {
91 case AUTH_NULL:
92 dummy = _svcauth_null(rqst, msg);
93 return (dummy);
94 case AUTH_SYS:
95 dummy = _svcauth_unix(rqst, msg);
96 return (dummy);
97 case AUTH_SHORT:
98 dummy = _svcauth_short(rqst, msg);
99 return (dummy);
100 case RPCSEC_GSS:
101 if (!_svcauth_rpcsec_gss)
102 return (AUTH_REJECTEDCRED);
103 dummy = _svcauth_rpcsec_gss(rqst, msg);
104 return (dummy);
105 default:
106 break;
107 }
108
109 return (AUTH_REJECTEDCRED);
110 }
111
112 /*
113 * A set of null auth methods used by any authentication protocols
114 * that don't need to inspect or modify the message body.
115 */
116 static bool_t
117 svcauth_null_wrap(SVCAUTH *auth, struct mbuf **mp)
118 {
119
120 return (TRUE);
121 }
122
123 static bool_t
124 svcauth_null_unwrap(SVCAUTH *auth, struct mbuf **mp)
125 {
126
127 return (TRUE);
128 }
129
130 static void
131 svcauth_null_release(SVCAUTH *auth)
132 {
133
134 }
135
136 static struct svc_auth_ops svc_auth_null_ops = {
137 svcauth_null_wrap,
138 svcauth_null_unwrap,
139 svcauth_null_release,
140 };
141
142 /*ARGSUSED*/
143 enum auth_stat
144 _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
145 {
146
147 rqst->rq_verf = _null_auth;
148 return (AUTH_OK);
149 }
150
151 int
152 svc_auth_reg(int flavor,
153 enum auth_stat (*svcauth)(struct svc_req *, struct rpc_msg *),
154 int (*getcred)(struct svc_req *, struct ucred **, int *))
155 {
156
157 if (flavor == RPCSEC_GSS) {
158 _svcauth_rpcsec_gss = svcauth;
159 _svcauth_rpcsec_gss_getcred = getcred;
160 }
161 return (TRUE);
162 }
163
164 int
165 svc_getcred(struct svc_req *rqst, struct ucred **crp, int *flavorp)
166 {
167 struct ucred *cr = NULL;
168 int flavor, i;
169 struct xucred *xcr;
170
171 flavor = rqst->rq_cred.oa_flavor;
172 if (flavorp)
173 *flavorp = flavor;
174
175 switch (flavor) {
176 case AUTH_UNIX:
177 xcr = (struct xucred *) rqst->rq_clntcred;
178 cr = crget();
179 cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid;
180 cr->cr_ngroups = xcr->cr_ngroups;
181 for (i = 0; i < xcr->cr_ngroups; i++)
182 cr->cr_groups[i] = xcr->cr_groups[i];
183 cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0];
184 *crp = cr;
185 return (TRUE);
186
187 case RPCSEC_GSS:
188 if (!_svcauth_rpcsec_gss_getcred)
189 return (FALSE);
190 return (_svcauth_rpcsec_gss_getcred(rqst, crp, flavorp));
191
192 default:
193 return (FALSE);
194 }
195 }
196
197
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