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svc_auth.c revision 1.1 
      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 #if defined(LIBC_SCCS) && !defined(lint)
     31 /*static char *sccsid = "from: @(#)svc_auth.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
     32 /*static char *sccsid = "from: @(#)svc_auth.c	2.1 88/08/07 4.0 RPCSRC";*/
     33 static char *rcsid = "$Id: svc_auth.c,v 1.1 1993/10/07 07:30:15 cgd Exp $";
     34 #endif
     35 
     36 /*
     37  * svc_auth_nodes.c, Server-side rpc authenticator interface,
     38  * *WITHOUT* DES authentication.
     39  *
     40  * Copyright (C) 1984, Sun Microsystems, Inc.
     41  */
     42 
     43 #include <rpc/rpc.h>
     44 
     45 /*
     46  * svcauthsw is the bdevsw of server side authentication.
     47  *
     48  * Server side authenticators are called from authenticate by
     49  * using the client auth struct flavor field to index into svcauthsw.
     50  * The server auth flavors must implement a routine that looks
     51  * like:
     52  *
     53  *	enum auth_stat
     54  *	flavorx_auth(rqst, msg)
     55  *		register struct svc_req *rqst;
     56  *		register struct rpc_msg *msg;
     57  *
     58  */
     59 
     60 enum auth_stat _svcauth_null();		/* no authentication */
     61 enum auth_stat _svcauth_unix();		/* unix style (uid, gids) */
     62 enum auth_stat _svcauth_short();	/* short hand unix style */
     63 
     64 static struct {
     65 	enum auth_stat (*authenticator)();
     66 } svcauthsw[] = {
     67 	_svcauth_null,			/* AUTH_NULL */
     68 	_svcauth_unix,			/* AUTH_UNIX */
     69 	_svcauth_short,			/* AUTH_SHORT */
     70 };
     71 #define	AUTH_MAX	2		/* HIGHEST AUTH NUMBER */
     72 
     73 
     74 /*
     75  * The call rpc message, msg has been obtained from the wire.  The msg contains
     76  * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
     77  * if the msg is successfully authenticated.  If AUTH_OK then the routine also
     78  * does the following things:
     79  * set rqst->rq_xprt->verf to the appropriate response verifier;
     80  * sets rqst->rq_client_cred to the "cooked" form of the credentials.
     81  *
     82  * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
     83  * its length is set appropriately.
     84  *
     85  * The caller still owns and is responsible for msg->u.cmb.cred and
     86  * msg->u.cmb.verf.  The authentication system retains ownership of
     87  * rqst->rq_client_cred, the cooked credentials.
     88  *
     89  * There is an assumption that any flavour less than AUTH_NULL is
     90  * invalid.
     91  */
     92 enum auth_stat
     93 _authenticate(rqst, msg)
     94 	register struct svc_req *rqst;
     95 	struct rpc_msg *msg;
     96 {
     97 	register int cred_flavor;
     98 
     99 	rqst->rq_cred = msg->rm_call.cb_cred;
    100 	rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
    101 	rqst->rq_xprt->xp_verf.oa_length = 0;
    102 	cred_flavor = rqst->rq_cred.oa_flavor;
    103 	if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) {
    104 		return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg));
    105 	}
    106 
    107 	return (AUTH_REJECTEDCRED);
    108 }
    109 
    110 enum auth_stat
    111 _svcauth_null(/*rqst, msg*/)
    112 	/*struct svc_req *rqst;
    113 	struct rpc_msg *msg;*/
    114 {
    115 
    116 	return (AUTH_OK);
    117 }
    118