source: rtems/cpukit/librpc/src/rpc/svc_auth.c @ 63db533

4.104.114.84.95
Last change on this file since 63db533 was 63db533, checked in by Joel Sherrill <joel.sherrill@…>, on 06/29/00 at 22:34:55

Disabled #ident since the h8300-rtems binutils do not like the
generated assembly from it.

  • Property mode set to 100644
File size: 6.1 KB
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1/*
2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part.  Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
8 *
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12 *
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
16 *
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
20 *
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
24 *
25 * Sun Microsystems, Inc.
26 * 2550 Garcia Avenue
27 * Mountain View, California  94043
28 */
29/*
30 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
31 */
32
33/* #ident       "@(#)svc_auth.c 1.16    94/04/24 SMI" */
34
35#if !defined(lint) && defined(SCCSIDS)
36#if 0
37static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
38#else
39static const char rcsid[] =
40 "$FreeBSD: src/lib/libc/rpc/svc_auth.c,v 1.7 1999/12/29 05:04:16 peter Exp $";
41#endif
42#endif
43
44/*
45 * svc_auth.c, Server-side rpc authenticator interface.
46 *
47 */
48
49#ifdef _KERNEL
50#include <sys/param.h>
51#include <rpc/types.h>
52#include <rpc/xdr.h>
53#include <rpc/auth.h>
54#include <rpc/clnt.h>
55#include <rpc/rpc_msg.h>
56#include <rpc/svc.h>
57#include <rpc/svc_auth.h>
58#else
59#include <stdlib.h>
60#include <rpc/rpc.h>
61#endif
62#include <sys/types.h>
63
64/*
65 * svcauthsw is the bdevsw of server side authentication.
66 *
67 * Server side authenticators are called from authenticate by
68 * using the client auth struct flavor field to index into svcauthsw.
69 * The server auth flavors must implement a routine that looks
70 * like:
71 *
72 *      enum auth_stat
73 *      flavorx_auth(rqst, msg)
74 *              register struct svc_req *rqst;
75 *              register struct rpc_msg *msg;
76 *
77 */
78
79enum auth_stat _svcauth_null(); /* no authentication */
80enum auth_stat _svcauth_unix();         /* (system) unix style (uid, gids) */
81enum auth_stat _svcauth_short();        /* short hand unix style */
82enum auth_stat _svcauth_des();          /* des style */
83
84/* declarations to allow servers to specify new authentication flavors */
85struct authsvc {
86        int     flavor;
87        enum    auth_stat (*handler)();
88        struct  authsvc   *next;
89};
90#define Auths ((struct authsvc *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_auths_Auths)
91
92/*
93 * The call rpc message, msg has been obtained from the wire.  The msg contains
94 * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
95 * if the msg is successfully authenticated.  If AUTH_OK then the routine also
96 * does the following things:
97 * set rqst->rq_xprt->verf to the appropriate response verifier;
98 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
99 *
100 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
101 * its length is set appropriately.
102 *
103 * The caller still owns and is responsible for msg->u.cmb.cred and
104 * msg->u.cmb.verf.  The authentication system retains ownership of
105 * rqst->rq_client_cred, the cooked credentials.
106 *
107 * There is an assumption that any flavour less than AUTH_NULL is
108 * invalid.
109 */
110enum auth_stat
111_authenticate(rqst, msg)
112        register struct svc_req *rqst;
113        struct rpc_msg *msg;
114{
115        register int cred_flavor;
116        register struct authsvc *asp;
117
118        rqst->rq_cred = msg->rm_call.cb_cred;
119        rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
120        rqst->rq_xprt->xp_verf.oa_length = 0;
121        cred_flavor = rqst->rq_cred.oa_flavor;
122        switch (cred_flavor) {
123        case AUTH_NULL:
124                return(_svcauth_null(rqst, msg));
125        case AUTH_UNIX:
126                return(_svcauth_unix(rqst, msg));
127        case AUTH_SHORT:
128                return(_svcauth_short(rqst, msg));
129        /*
130         * We leave AUTH_DES turned off by default because svcauth_des()
131         * needs getpublickey(), which is in librpcsvc, not libc. If we
132         * included AUTH_DES as a built-in flavor, programs that don't
133         * have -lrpcsvc in their Makefiles wouldn't link correctly, even
134         * though they don't use AUTH_DES. And I'm too lazy to go through
135         * the tree looking for all of them.
136         */
137#ifdef DES_BUILTIN
138        case AUTH_DES:
139                return(_svcauth_des(rqst, msg));
140#endif
141        }
142
143        /* flavor doesn't match any of the builtin types, so try new ones */
144        for (asp = Auths; asp; asp = asp->next) {
145                if (asp->flavor == cred_flavor) {
146                        enum auth_stat as;
147
148                        as = (*asp->handler)(rqst, msg);
149                        return (as);
150                }
151        }
152
153        return (AUTH_REJECTEDCRED);
154}
155
156/*ARGSUSED*/
157enum auth_stat
158_svcauth_null(rqst, msg)
159        struct svc_req *rqst;
160        struct rpc_msg *msg;
161{
162        return (AUTH_OK);
163}
164
165/*
166 *  Allow the rpc service to register new authentication types that it is
167 *  prepared to handle.  When an authentication flavor is registered,
168 *  the flavor is checked against already registered values.  If not
169 *  registered, then a new Auths entry is added on the list.
170 *
171 *  There is no provision to delete a registration once registered.
172 *
173 *  This routine returns:
174 *       0 if registration successful
175 *       1 if flavor already registered
176 *      -1 if can't register (errno set)
177 */
178
179int
180svc_auth_reg(cred_flavor, handler)
181        register int cred_flavor;
182        enum auth_stat (*handler)();
183{
184        register struct authsvc *asp;
185
186        switch (cred_flavor) {
187            case AUTH_NULL:
188            case AUTH_UNIX:
189            case AUTH_SHORT:
190#ifdef DES_BUILTIN
191            case AUTH_DES:
192#endif
193                /* already registered */
194                return (1);
195
196            default:
197                for (asp = Auths; asp; asp = asp->next) {
198                        if (asp->flavor == cred_flavor) {
199                                /* already registered */
200                                return (1);
201                        }
202                }
203
204                /* this is a new one, so go ahead and register it */
205                asp = (struct authsvc *)mem_alloc(sizeof (*asp));
206                if (asp == NULL) {
207                        return (-1);
208                }
209                asp->flavor = cred_flavor;
210                asp->handler = handler;
211                asp->next = Auths;
212                Auths = asp;
213                break;
214        }
215        return (0);
216}
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