xref: /original-bsd/lib/librpc/rpc/svc_auth.c (revision 4961a629)
1 #if !defined(lint) && defined(SCCSIDS)
2 static char sccsid[] = "@(#)svc_auth.c	2.1 88/08/07 4.0 RPCSRC; from 1.19 87/08/11 Copyr 1984 Sun Micro";
3 #endif
4 /*
5  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
6  * unrestricted use provided that this legend is included on all tape
7  * media and as a part of the software program in whole or part.  Users
8  * may copy or modify Sun RPC without charge, but are not authorized
9  * to license or distribute it to anyone else except as part of a product or
10  * program developed by the user.
11  *
12  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
13  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
14  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
15  *
16  * Sun RPC is provided with no support and without any obligation on the
17  * part of Sun Microsystems, Inc. to assist in its use, correction,
18  * modification or enhancement.
19  *
20  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
21  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
22  * OR ANY PART THEREOF.
23  *
24  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
25  * or profits or other special, indirect and consequential damages, even if
26  * Sun has been advised of the possibility of such damages.
27  *
28  * Sun Microsystems, Inc.
29  * 2550 Garcia Avenue
30  * Mountain View, California  94043
31  */
32 
33 /*
34  * svc_auth_nodes.c, Server-side rpc authenticator interface,
35  * *WITHOUT* DES authentication.
36  *
37  * Copyright (C) 1984, Sun Microsystems, Inc.
38  */
39 
40 #include <rpc/rpc.h>
41 
42 /*
43  * svcauthsw is the bdevsw of server side authentication.
44  *
45  * Server side authenticators are called from authenticate by
46  * using the client auth struct flavor field to index into svcauthsw.
47  * The server auth flavors must implement a routine that looks
48  * like:
49  *
50  *	enum auth_stat
51  *	flavorx_auth(rqst, msg)
52  *		register struct svc_req *rqst;
53  *		register struct rpc_msg *msg;
54  *
55  */
56 
57 enum auth_stat _svcauth_null();		/* no authentication */
58 enum auth_stat _svcauth_unix();		/* unix style (uid, gids) */
59 enum auth_stat _svcauth_short();	/* short hand unix style */
60 
61 static struct {
62 	enum auth_stat (*authenticator)();
63 } svcauthsw[] = {
64 	_svcauth_null,			/* AUTH_NULL */
65 	_svcauth_unix,			/* AUTH_UNIX */
66 	_svcauth_short,			/* AUTH_SHORT */
67 };
68 #define	AUTH_MAX	2		/* HIGHEST AUTH NUMBER */
69 
70 
71 /*
72  * The call rpc message, msg has been obtained from the wire.  The msg contains
73  * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
74  * if the msg is successfully authenticated.  If AUTH_OK then the routine also
75  * does the following things:
76  * set rqst->rq_xprt->verf to the appropriate response verifier;
77  * sets rqst->rq_client_cred to the "cooked" form of the credentials.
78  *
79  * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
80  * its length is set appropriately.
81  *
82  * The caller still owns and is responsible for msg->u.cmb.cred and
83  * msg->u.cmb.verf.  The authentication system retains ownership of
84  * rqst->rq_client_cred, the cooked credentials.
85  *
86  * There is an assumption that any flavour less than AUTH_NULL is
87  * invalid.
88  */
89 enum auth_stat
_authenticate(rqst,msg)90 _authenticate(rqst, msg)
91 	register struct svc_req *rqst;
92 	struct rpc_msg *msg;
93 {
94 	register int cred_flavor;
95 
96 	rqst->rq_cred = msg->rm_call.cb_cred;
97 	rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
98 	rqst->rq_xprt->xp_verf.oa_length = 0;
99 	cred_flavor = rqst->rq_cred.oa_flavor;
100 	if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) {
101 		return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg));
102 	}
103 
104 	return (AUTH_REJECTEDCRED);
105 }
106 
107 enum auth_stat
_svcauth_null()108 _svcauth_null(/*rqst, msg*/)
109 	/*struct svc_req *rqst;
110 	struct rpc_msg *msg;*/
111 {
112 
113 	return (AUTH_OK);
114 }
115