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svc_auth.c revision 1.7 
      1 /*	$NetBSD: svc_auth.c,v 1.7 1998/07/26 13:57:41 mycroft 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 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 #if 0
     35 static char *sccsid = "@(#)svc_auth.c 1.19 87/08/11 Copyr 1984 Sun Micro";
     36 static char *sccsid = "@(#)svc_auth.c	2.1 88/08/07 4.0 RPCSRC";
     37 #else
     38 __RCSID("$NetBSD: svc_auth.c,v 1.7 1998/07/26 13:57:41 mycroft Exp $");
     39 #endif
     40 #endif
     41 
     42 /*
     43  * svc_auth_nodes.c, Server-side rpc authenticator interface,
     44  * *WITHOUT* DES authentication.
     45  *
     46  * Copyright (C) 1984, Sun Microsystems, Inc.
     47  */
     48 
     49 #include <rpc/rpc.h>
     50 
     51 /*
     52  * svcauthsw is the bdevsw of server side authentication.
     53  *
     54  * Server side authenticators are called from authenticate by
     55  * using the client auth struct flavor field to index into svcauthsw.
     56  * The server auth flavors must implement a routine that looks
     57  * like:
     58  *
     59  *	enum auth_stat
     60  *	flavorx_auth(rqst, msg)
     61  *		struct svc_req *rqst;
     62  *		struct rpc_msg *msg;
     63  *
     64  */
     65 
     66 static const struct {
     67 	enum auth_stat (*authenticator) __P((struct svc_req *,
     68     struct rpc_msg *));
     69 } svcauthsw[] = {
     70 	{ _svcauth_null },		/* AUTH_NULL */
     71 	{ _svcauth_unix },		/* AUTH_UNIX */
     72 	{ _svcauth_short }		/* AUTH_SHORT */
     73 };
     74 #define	AUTH_MAX	2		/* HIGHEST AUTH NUMBER */
     75 
     76 
     77 /*
     78  * The call rpc message, msg has been obtained from the wire.  The msg contains
     79  * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
     80  * if the msg is successfully authenticated.  If AUTH_OK then the routine also
     81  * does the following things:
     82  * set rqst->rq_xprt->verf to the appropriate response verifier;
     83  * sets rqst->rq_client_cred to the "cooked" form of the credentials.
     84  *
     85  * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
     86  * its length is set appropriately.
     87  *
     88  * The caller still owns and is responsible for msg->u.cmb.cred and
     89  * msg->u.cmb.verf.  The authentication system retains ownership of
     90  * rqst->rq_client_cred, the cooked credentials.
     91  *
     92  * There is an assumption that any flavour less than AUTH_NULL is
     93  * invalid.
     94  */
     95 enum auth_stat
     96 _authenticate(rqst, msg)
     97 	struct svc_req *rqst;
     98 	struct rpc_msg *msg;
     99 {
    100 	int cred_flavor;
    101 
    102 	rqst->rq_cred = msg->rm_call.cb_cred;
    103 	rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
    104 	rqst->rq_xprt->xp_verf.oa_length = 0;
    105 	cred_flavor = rqst->rq_cred.oa_flavor;
    106 	if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) {
    107 		return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg));
    108 	}
    109 
    110 	return (AUTH_REJECTEDCRED);
    111 }
    112 
    113 enum auth_stat
    114 _svcauth_null(rqst, msg)
    115 	struct svc_req *rqst;
    116 	struct rpc_msg *msg;
    117 {
    118 
    119 	return (AUTH_OK);
    120 }
    121