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FreeBSD/Linux Kernel Cross Reference
sys/rpc/svc_auth.c

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    1 /*      $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos 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  * Copyright (c) 1986-1991 by Sun Microsystems Inc. 
   33  */
   34 
   35 #if defined(LIBC_SCCS) && !defined(lint)
   36 #ident  "@(#)svc_auth.c 1.16    94/04/24 SMI"
   37 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
   38 #endif
   39 #include <sys/cdefs.h>
   40 __FBSDID("$FreeBSD: releng/7.4/sys/rpc/svc_auth.c 178061 2008-04-10 09:39:29Z dfr $");
   41 
   42 /*
   43  * svc_auth.c, Server-side rpc authenticator interface.
   44  *
   45  */
   46 
   47 #include <sys/param.h>
   48 #include <sys/lock.h>
   49 #include <sys/mutex.h>
   50 #include <sys/systm.h>
   51 #include <sys/ucred.h>
   52 
   53 #include <rpc/rpc.h>
   54 
   55 /*
   56  * The call rpc message, msg has been obtained from the wire.  The msg contains
   57  * the raw form of credentials and verifiers.  authenticate returns AUTH_OK
   58  * if the msg is successfully authenticated.  If AUTH_OK then the routine also
   59  * does the following things:
   60  * set rqst->rq_xprt->verf to the appropriate response verifier;
   61  * sets rqst->rq_client_cred to the "cooked" form of the credentials.
   62  *
   63  * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
   64  * its length is set appropriately.
   65  *
   66  * The caller still owns and is responsible for msg->u.cmb.cred and
   67  * msg->u.cmb.verf.  The authentication system retains ownership of
   68  * rqst->rq_client_cred, the cooked credentials.
   69  *
   70  * There is an assumption that any flavour less than AUTH_NULL is
   71  * invalid.
   72  */
   73 enum auth_stat
   74 _authenticate(struct svc_req *rqst, struct rpc_msg *msg)
   75 {
   76         int cred_flavor;
   77         enum auth_stat dummy;
   78 
   79         rqst->rq_cred = msg->rm_call.cb_cred;
   80         rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
   81         rqst->rq_xprt->xp_verf.oa_length = 0;
   82         cred_flavor = rqst->rq_cred.oa_flavor;
   83         switch (cred_flavor) {
   84         case AUTH_NULL:
   85                 dummy = _svcauth_null(rqst, msg);
   86                 return (dummy);
   87         case AUTH_SYS:
   88                 dummy = _svcauth_unix(rqst, msg);
   89                 return (dummy);
   90         case AUTH_SHORT:
   91                 dummy = _svcauth_short(rqst, msg);
   92                 return (dummy);
   93         default:
   94                 break;
   95         }
   96 
   97         return (AUTH_REJECTEDCRED);
   98 }
   99 
  100 /*ARGSUSED*/
  101 enum auth_stat
  102 _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
  103 {
  104         return (AUTH_OK);
  105 }
  106 
  107 int
  108 svc_getcred(struct svc_req *rqst, struct ucred *cr, int *flavorp)
  109 {
  110         int flavor, i;
  111         struct xucred *xcr;
  112 
  113         KASSERT(!crshared(cr), ("svc_getcred with shared cred"));
  114 
  115         flavor = rqst->rq_cred.oa_flavor;
  116         if (flavorp)
  117                 *flavorp = flavor;
  118 
  119         switch (flavor) {
  120         case AUTH_UNIX:
  121                 xcr = (struct xucred *) rqst->rq_clntcred;
  122                 cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid;
  123                 cr->cr_ngroups = xcr->cr_ngroups;
  124                 for (i = 0; i < xcr->cr_ngroups; i++)
  125                         cr->cr_groups[i] = xcr->cr_groups[i];
  126                 cr->cr_rgid = cr->cr_groups[0];
  127                 return (TRUE);
  128 
  129         default:
  130                 return (FALSE);
  131         }
  132 }
  133 

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