1 /* $OpenBSD: svc_auth.c,v 1.10 2016/09/23 02:53:46 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * svc_auth_nodes.c, Server-side rpc authenticator interface,
36 * *WITHOUT* DES authentication.
37 */
38
39 #include <rpc/rpc.h>
40
41 /*
42 * svcauthsw is the bdevsw of server side authentication.
43 *
44 * Server side authenticators are called from authenticate by
45 * using the client auth struct flavor field to index into svcauthsw.
46 * The server auth flavors must implement a routine that looks
47 * like:
48 *
49 * enum auth_stat
50 * flavorx_auth(rqst, msg)
51 * struct svc_req *rqst;
52 * struct rpc_msg *msg;
53 *
54 */
55
56 /* no authentication */
57 enum auth_stat _svcauth_null(void);
58 PROTO_NORMAL(_svcauth_null);
59
60 static struct {
61 enum auth_stat (*authenticator)();
62 } svcauthsw[] = {
63 { _svcauth_null }, /* AUTH_NULL */
64 { _svcauth_unix }, /* AUTH_UNIX */
65 { _svcauth_short } /* AUTH_SHORT */
66 };
67 #define AUTH_MAX 2 /* HIGHEST AUTH NUMBER */
68
69
70 /*
71 * The call rpc message, msg has been obtained from the wire. The msg contains
72 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
73 * if the msg is successfully authenticated. If AUTH_OK then the routine also
74 * does the following things:
75 * set rqst->rq_xprt->verf to the appropriate response verifier;
76 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
77 *
78 * NB: rqst->rq_cxprt->verf must be pre-allocated;
79 * its length is set appropriately.
80 *
81 * The caller still owns and is responsible for msg->u.cmb.cred and
82 * msg->u.cmb.verf. The authentication system retains ownership of
83 * rqst->rq_client_cred, the cooked credentials.
84 *
85 * There is an assumption that any flavour less than AUTH_NULL is
86 * invalid.
87 */
88 enum auth_stat
_authenticate(struct svc_req * rqst,struct rpc_msg * msg)89 _authenticate(struct svc_req *rqst, struct rpc_msg *msg)
90 {
91 int cred_flavor;
92
93 rqst->rq_cred = msg->rm_call.cb_cred;
94 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
95 rqst->rq_xprt->xp_verf.oa_length = 0;
96 cred_flavor = rqst->rq_cred.oa_flavor;
97 if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) {
98 return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg));
99 }
100
101 return (AUTH_REJECTEDCRED);
102 }
103
104 enum auth_stat
_svcauth_null(void)105 _svcauth_null(void)
106 /*struct svc_req *rqst;
107 struct rpc_msg *msg;*/
108 {
109
110 return (AUTH_OK);
111 }
112 DEF_STRONG(_svcauth_null);
113