sunrpc/svc_auth.c

   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
  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
 108 _svcauth_null(/*rqst, msg*/)
 109         /*struct svc_req *rqst;
 110         struct rpc_msg *msg;*/
 111 {
 112
 113         return (AUTH_OK);
 114 }