Return to safefile.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / ipsec-tools / src / racoon

ipsec-tools

    1: /*	$NetBSD: safefile.c,v 1.4 2006/09/09 16:22:10 manu Exp $	*/
    2: 
    3: /*	$KAME: safefile.c,v 1.5 2001/03/05 19:54:06 thorpej Exp $	*/
    4: 
    5: /*
    6:  * Copyright (C) 2000 WIDE Project.
    7:  * All rights reserved.
    8:  *
    9:  * Redistribution and use in source and binary forms, with or without
   10:  * modification, are permitted provided that the following conditions
   11:  * are met:
   12:  * 1. Redistributions of source code must retain the above copyright
   13:  *    notice, this list of conditions and the following disclaimer.
   14:  * 2. Redistributions in binary form must reproduce the above copyright
   15:  *    notice, this list of conditions and the following disclaimer in the
   16:  *    documentation and/or other materials provided with the distribution.
   17:  * 3. Neither the name of the project nor the names of its contributors
   18:  *    may be used to endorse or promote products derived from this software
   19:  *    without specific prior written permission.
   20:  *
   21:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31:  * SUCH DAMAGE.
   32:  */
   33: 
   34: #include "config.h"
   35: 
   36: #include <sys/types.h>
   37: #include <sys/stat.h>
   38: #include <sys/socket.h>
   39: #include <netinet/in.h>
   40: #include <unistd.h>
   41: 
   42: #include "plog.h"
   43: #include "debug.h"
   44: #include "misc.h"
   45: #include "safefile.h"
   46: 
   47: int
   48: safefile(path, secret)
   49: 	const char *path;
   50: 	int secret;
   51: {
   52: 	struct stat s;
   53: 	uid_t me;
   54: 
   55: 	/* no setuid */
   56: 	if (getuid() != geteuid()) {
   57: 		plog(LLV_ERROR, LOCATION, NULL,
   58: 		    "setuid'ed execution not allowed\n");
   59: 		return -1;
   60: 	}
   61: 
   62: 	if (stat(path, &s) != 0)
   63: 		return -1;
   64: 
   65: 	/* the file must be owned by the running uid */
   66: 	me = getuid();
   67: 	if (s.st_uid != me) {
   68: 		plog(LLV_ERROR, LOCATION, NULL,
   69: 		    "%s has invalid owner uid\n", path);
   70: 		return -1;
   71: 	}
   72: 
   73: 	switch (s.st_mode & S_IFMT) {
   74: 	case S_IFREG:
   75: 		break;
   76: 	default:
   77: 		plog(LLV_ERROR, LOCATION, NULL,
   78: 		    "%s is an invalid file type 0x%x\n", path,
   79: 		    (s.st_mode & S_IFMT));
   80: 		return -1;
   81: 	}
   82: 
   83: 	/* secret file should not be read by others */
   84: 	if (secret) {
   85: 		if ((s.st_mode & S_IRWXG) != 0 || (s.st_mode & S_IRWXO) != 0) {
   86: 			plog(LLV_ERROR, LOCATION, NULL,
   87: 			    "%s has weak file permission\n", path);
   88: 			return -1;
   89: 		}
   90: 	}
   91: 
   92: 	return 0;
   93: }