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svc_auth.c revision 1.2 
      1 /*	$NetBSD: svc_auth.c,v 1.2 1995/02/25 03:01:57 cgd 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 #if defined(LIBC_SCCS) && !defined(lint)
     33 /*static char *sccsid = "from: @(#)svc_auth.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
     34 /*static char *sccsid = "from: @(#)svc_auth.c	2.1 88/08/07 4.0 RPCSRC";*/
     35 static char *rcsid = "$NetBSD: svc_auth.c,v 1.2 1995/02/25 03:01:57 cgd Exp $";
     36 #endif
     37 
     38 /*
     39  * svc_auth_nodes.c, Server-side rpc authenticator interface,
     40  * *WITHOUT* DES authentication.
     41  *
     42  * Copyright (C) 1984, Sun Microsystems, Inc.
     43  */
     44 
     45 #include <rpc/rpc.h>
     46 
     47 /*
     48  * svcauthsw is the bdevsw of server side authentication.
     49  *
     50  * Server side authenticators are called from authenticate by
     51  * using the client auth struct flavor field to index into svcauthsw.
     52  * The server auth flavors must implement a routine that looks
     53  * like:
     54  *
     55  *	enum auth_stat
     56  *	flavorx_auth(rqst, msg)
     57  *		register struct svc_req *rqst;
     58  *		register struct rpc_msg *msg;
     59  *
     60  */
     61 
     62 enum auth_stat _svcauth_null();		/* no authentication */
     63 enum auth_stat _svcauth_unix();		/* unix style (uid, gids) */
     64 enum auth_stat _svcauth_short();	/* short hand unix style */
     65 
     66 static struct {
     67 	enum auth_stat (*authenticator)();
     68 } svcauthsw[] = {
     69 	_svcauth_null,			/* AUTH_NULL */
     70 	_svcauth_unix,			/* AUTH_UNIX */
     71 	_svcauth_short,			/* AUTH_SHORT */
     72 };
     73 #define	AUTH_MAX	2		/* HIGHEST AUTH NUMBER */
     74 
     75 
     76 /*
     77  * The call rpc message, msg has been obtained from the wire.  The msg contains
     78  * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
     79  * if the msg is successfully authenticated.  If AUTH_OK then the routine also
     80  * does the following things:
     81  * set rqst->rq_xprt->verf to the appropriate response verifier;
     82  * sets rqst->rq_client_cred to the "cooked" form of the credentials.
     83  *
     84  * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
     85  * its length is set appropriately.
     86  *
     87  * The caller still owns and is responsible for msg->u.cmb.cred and
     88  * msg->u.cmb.verf.  The authentication system retains ownership of
     89  * rqst->rq_client_cred, the cooked credentials.
     90  *
     91  * There is an assumption that any flavour less than AUTH_NULL is
     92  * invalid.
     93  */
     94 enum auth_stat
     95 _authenticate(rqst, msg)
     96 	register struct svc_req *rqst;
     97 	struct rpc_msg *msg;
     98 {
     99 	register int cred_flavor;
    100 
    101 	rqst->rq_cred = msg->rm_call.cb_cred;
    102 	rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
    103 	rqst->rq_xprt->xp_verf.oa_length = 0;
    104 	cred_flavor = rqst->rq_cred.oa_flavor;
    105 	if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) {
    106 		return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg));
    107 	}
    108 
    109 	return (AUTH_REJECTEDCRED);
    110 }
    111 
    112 enum auth_stat
    113 _svcauth_null(/*rqst, msg*/)
    114 	/*struct svc_req *rqst;
    115 	struct rpc_msg *msg;*/
    116 {
    117 
    118 	return (AUTH_OK);
    119 }
    120