projects / apple / network_cmds.git / blame
| Commit | Line | Data |
|---|---|---|
| ac2f15b3 | 1 | /* $KAME: safefile.c,v 1.5 2001/03/05 19:54:06 thorpej Exp $ */ |
| 7ba0088d A |
2 | |
| 3 | /* | |
| 4 | * Copyright (C) 2000 WIDE Project. | |
| 5 | * All rights reserved. | |
| 6 | * | |
| 7 | * Redistribution and use in source and binary forms, with or without | |
| 8 | * modification, are permitted provided that the following conditions | |
| 9 | * are met: | |
| 10 | * 1. Redistributions of source code must retain the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer. | |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 | * notice, this list of conditions and the following disclaimer in the | |
| 14 | * documentation and/or other materials provided with the distribution. | |
| 15 | * 3. Neither the name of the project nor the names of its contributors | |
| 16 | * may be used to endorse or promote products derived from this software | |
| 17 | * without specific prior written permission. | |
| 18 | * | |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND | |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE | |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 29 | * SUCH DAMAGE. | |
| 30 | */ | |
| 31 | ||
| 32 | #include <sys/types.h> | |
| 33 | #include <sys/stat.h> | |
| 34 | #include <sys/socket.h> | |
| 35 | #include <netinet/in.h> | |
| 36 | #include <unistd.h> | |
| 37 | ||
| 38 | #include "plog.h" | |
| 39 | #include "debug.h" | |
| 40 | #include "misc.h" | |
| 41 | #include "safefile.h" | |
| 42 | ||
| 43 | int | |
| 44 | safefile(path, secret) | |
| 45 | const char *path; | |
| 46 | int secret; | |
| 47 | { | |
| 48 | struct stat s; | |
| 49 | uid_t me; | |
| 50 | ||
| 51 | /* no setuid */ | |
| 52 | if (getuid() != geteuid()) { | |
| 53 | plog(LLV_ERROR, LOCATION, NULL, | |
| 54 | "setuid'ed execution not allowed\n"); | |
| 55 | return -1; | |
| 56 | } | |
| 57 | ||
| 58 | if (stat(path, &s) != 0) | |
| 59 | return -1; | |
| 60 | ||
| 61 | /* the file must be owned by the running uid */ | |
| 62 | me = getuid(); | |
| 63 | if (s.st_uid != me) { | |
| 64 | plog(LLV_ERROR, LOCATION, NULL, | |
| 65 | "%s has invalid owner uid\n", path); | |
| 66 | return -1; | |
| 67 | } | |
| 68 | ||
| 69 | switch (s.st_mode & S_IFMT) { | |
| 70 | case S_IFREG: | |
| 71 | break; | |
| 72 | default: | |
| 73 | plog(LLV_ERROR, LOCATION, NULL, | |
| 74 | "%s is an invalid file type 0x%x\n", path, | |
| 75 | (s.st_mode & S_IFMT)); | |
| 76 | return -1; | |
| 77 | } | |
| 78 | ||
| 79 | /* secret file should not be read by others */ | |
| 80 | if (secret) { | |
| 81 | if ((s.st_mode & S_IRWXG) != 0 || (s.st_mode & S_IRWXO) != 0) { | |
| 82 | plog(LLV_ERROR, LOCATION, NULL, | |
| 83 | "%s has weak file permission\n", path); | |
| 84 | return -1; | |
| 85 | } | |
| 86 | } | |
| 87 | ||
| 88 | return 0; | |
| 89 | } |