/* $NetBSD: safefile.c,v 1.4 2006/09/09 16:22:10 manu Exp $ */
|
|
/* $KAME: safefile.c,v 1.5 2001/03/05 19:54:06 thorpej Exp $ */
|
|
/*
|
* Copyright (C) 2000 WIDE Project.
|
* All rights reserved.
|
*
|
* Redistribution and use in source and binary forms, with or without
|
* modification, are permitted provided that the following conditions
|
* are met:
|
* 1. Redistributions of source code must retain the above copyright
|
* notice, this list of conditions and the following disclaimer.
|
* 2. Redistributions in binary form must reproduce the above copyright
|
* notice, this list of conditions and the following disclaimer in the
|
* documentation and/or other materials provided with the distribution.
|
* 3. Neither the name of the project nor the names of its contributors
|
* may be used to endorse or promote products derived from this software
|
* without specific prior written permission.
|
*
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
* SUCH DAMAGE.
|
*/
|
|
#include "config.h"
|
|
#include <sys/types.h>
|
#include <sys/stat.h>
|
#include <sys/socket.h>
|
#include <netinet/in.h>
|
#include <unistd.h>
|
|
#include "plog.h"
|
#include "debug.h"
|
#include "misc.h"
|
#include "safefile.h"
|
|
int
|
safefile(path, secret)
|
const char *path;
|
int secret;
|
{
|
struct stat s;
|
uid_t me;
|
|
/* no setuid */
|
if (getuid() != geteuid()) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"setuid'ed execution not allowed\n");
|
return -1;
|
}
|
|
if (stat(path, &s) != 0)
|
return -1;
|
|
/* the file must be owned by the running uid */
|
me = getuid();
|
if (s.st_uid != me) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"%s has invalid owner uid\n", path);
|
return -1;
|
}
|
|
switch (s.st_mode & S_IFMT) {
|
case S_IFREG:
|
break;
|
default:
|
plog(LLV_ERROR, LOCATION, NULL,
|
"%s is an invalid file type 0x%x\n", path,
|
(s.st_mode & S_IFMT));
|
return -1;
|
}
|
|
/* secret file should not be read by others */
|
if (secret) {
|
if ((s.st_mode & S_IRWXG) != 0 || (s.st_mode & S_IRWXO) != 0) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"%s has weak file permission\n", path);
|
return -1;
|
}
|
}
|
|
return 0;
|
}
|
