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Annotation of embedaddon/ipsec-tools/src/racoon/safefile.c, revision 1.1.1.1

1.1       misho       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: }