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