usr.sbin/keyserv/keyserv_uid.c

   1 /*
   2  * Copyright (c) 1996
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/usr.sbin/keyserv/keyserv_uid.c,v 1.3 1999/08/28 01:16:41 peter Exp $
  33  * $DragonFly: src/usr.sbin/keyserv/keyserv_uid.c,v 1.3 2003/11/16 15:17:36 eirikn Exp $
  34  */
  35
  36 #include <signal.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40 #include <sys/types.h>
  41 #include <rpc/key_prot.h>
  42 #include <rpc/des.h>
  43 #include <sys/socket.h>
  44 #include <sys/param.h>
  45
  46 #include "keyserv.h"
  47
  48 /*
  49  * XXX should be declared somewhere
  50  */
  51 struct cmessage {
  52         struct cmsghdr cmsg;
  53         struct cmsgcred cmcred;
  54 };
  55
  56 int
  57 __rpc_get_local_uid(uid_t *uid, SVCXPRT *transp)
  58 {
  59         struct cmessage *cm;
  60
  61         if (transp->xp_verf.oa_length < sizeof(struct cmessage) ||
  62                 transp->xp_verf.oa_base == NULL ||
  63                 transp->xp_verf.oa_flavor != AUTH_UNIX)
  64                 return(-1);
  65
  66         cm = (struct cmessage *)transp->xp_verf.oa_base;
  67         if (cm->cmsg.cmsg_type != SCM_CREDS)
  68                 return(-1);
  69
  70         *uid = cm->cmcred.cmcred_euid;
  71         return(0);
  72 }