rpc.subproj/svc_auth_unix.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  27  * unrestricted use provided that this legend is included on all tape
  28  * media and as a part of the software program in whole or part.  Users
  29  * may copy or modify Sun RPC without charge, but are not authorized
  30  * to license or distribute it to anyone else except as part of a product or
  31  * program developed by the user.
  32  *
  33  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  34  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  35  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  36  *
  37  * Sun RPC is provided with no support and without any obligation on the
  38  * part of Sun Microsystems, Inc. to assist in its use, correction,
  39  * modification or enhancement.
  40  *
  41  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  42  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  43  * OR ANY PART THEREOF.
  44  *
  45  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  46  * or profits or other special, indirect and consequential damages, even if
  47  * Sun has been advised of the possibility of such damages.
  48  *
  49  * Sun Microsystems, Inc.
  50  * 2550 Garcia Avenue
  51  * Mountain View, California  94043
  52  */
  53
  54 #if defined(LIBC_SCCS) && !defined(lint)
  55 /*static char *sccsid = "from: @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";*/
  56 /*static char *sccsid = "from: @(#)svc_auth_unix.c      2.3 88/08/01 4.0 RPCSRC";*/
  57 static char *rcsid = "$Id: svc_auth_unix.c,v 1.5 2003/06/23 17:24:59 majka Exp $";
  58 #endif
  59
  60 /*
  61  * svc_auth_unix.c
  62  * Handles UNIX flavor authentication parameters on the service side of rpc.
  63  * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
  64  * _svcauth_unix does full blown unix style uid,gid+gids auth,
  65  * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
  66  * Note: the shorthand has been gutted for efficiency.
  67  *
  68  * Copyright (C) 1984, Sun Microsystems, Inc.
  69  */
  70
  71 #include <stdio.h>
  72 #include <string.h>
  73 #include <sys/param.h>
  74 #include <rpc/rpc.h>
  75
  76 /*
  77  * Unix longhand authenticator
  78  */
  79 enum auth_stat
  80 _svcauth_unix(rqst, msg)
  81         register struct svc_req *rqst;
  82         register struct rpc_msg *msg;
  83 {
  84         register enum auth_stat stat;
  85         XDR xdrs;
  86         register struct authunix_parms *aup;
  87         register long *buf;
  88         struct area {
  89                 struct authunix_parms area_aup;
  90                 char area_machname[MAX_MACHINE_NAME+1];
  91                 int area_gids[NGROUPS];
  92         } *area;
  93         u_int auth_len;
  94         int str_len, gid_len;
  95         register int i;
  96
  97         area = (struct area *) rqst->rq_clntcred;
  98         aup = &area->area_aup;
  99         aup->aup_machname = area->area_machname;
 100         aup->aup_gids = area->area_gids;
 101         auth_len = (u_int)msg->rm_call.cb_cred.oa_length;
 102         xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE);
 103         buf = (long *)XDR_INLINE(&xdrs, auth_len);
 104         if (buf != NULL) {
 105                 aup->aup_time = IXDR_GET_LONG(buf);
 106                 str_len = IXDR_GET_U_LONG(buf);
 107                 if (str_len > MAX_MACHINE_NAME) {
 108                         stat = AUTH_BADCRED;
 109                         goto done;
 110                 }
 111                 bcopy((caddr_t)buf, aup->aup_machname, (u_int)str_len);
 112                 aup->aup_machname[str_len] = 0;
 113                 str_len = RNDUP(str_len);
 114                 buf += str_len / sizeof (long);
 115                 aup->aup_uid = IXDR_GET_LONG(buf);
 116                 aup->aup_gid = IXDR_GET_LONG(buf);
 117                 gid_len = IXDR_GET_U_LONG(buf);
 118                 if (gid_len > NGROUPS) {
 119                         stat = AUTH_BADCRED;
 120                         goto done;
 121                 }
 122                 aup->aup_len = gid_len;
 123                 for (i = 0; i < gid_len; i++) {
 124                         aup->aup_gids[i] = IXDR_GET_LONG(buf);
 125                 }
 126                 /*
 127                  * five is the smallest unix credentials structure -
 128                  * timestamp, hostname len (0), uid, gid, and gids len (0).
 129                  */
 130                 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
 131                         (void) printf("bad auth_len gid %d str %d auth %d\n",
 132                             gid_len, str_len, auth_len);
 133                         stat = AUTH_BADCRED;
 134                         goto done;
 135                 }
 136         } else if (! xdr_authunix_parms(&xdrs, aup)) {
 137                 xdrs.x_op = XDR_FREE;
 138                 (void)xdr_authunix_parms(&xdrs, aup);
 139                 stat = AUTH_BADCRED;
 140                 goto done;
 141         }
 142         rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
 143         rqst->rq_xprt->xp_verf.oa_length = 0;
 144         stat = AUTH_OK;
 145 done:
 146         XDR_DESTROY(&xdrs);
 147         return (stat);
 148 }
 149
 150
 151 /*
 152  * Shorthand unix authenticator
 153  * Looks up longhand in a cache.
 154  */
 155 /*ARGSUSED*/
 156 enum auth_stat
 157 _svcauth_short(rqst, msg)
 158         struct svc_req *rqst;
 159         struct rpc_msg *msg;
 160 {
 161         return (AUTH_REJECTEDCRED);
 162 }