3f022419ae
function return value. Previously, some code used "rval", some used "ret". This standardizes on "ret" and uses "rc" for temporary return codes.
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/*
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* Copyright (c) 2012, 2014-2016 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <unistd.h>
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#include <errno.h>
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#include "sudo_compat.h"
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#include "sudo_util.h"
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#include "sudo_debug.h"
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/*
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* Verify that path is the right type and not writable by other users.
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*/
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static int
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sudo_secure_path(const char *path, unsigned int type, uid_t uid, gid_t gid, struct stat *sbp)
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{
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struct stat sb;
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int ret = SUDO_PATH_MISSING;
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debug_decl(sudo_secure_path, SUDO_DEBUG_UTIL)
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if (path != NULL && stat(path, &sb) == 0) {
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if ((sb.st_mode & _S_IFMT) != type) {
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ret = SUDO_PATH_BAD_TYPE;
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} else if (uid != (uid_t)-1 && sb.st_uid != uid) {
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ret = SUDO_PATH_WRONG_OWNER;
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} else if (sb.st_mode & S_IWOTH) {
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ret = SUDO_PATH_WORLD_WRITABLE;
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} else if (ISSET(sb.st_mode, S_IWGRP) &&
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(gid == (gid_t)-1 || sb.st_gid != gid)) {
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ret = SUDO_PATH_GROUP_WRITABLE;
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} else {
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ret = SUDO_PATH_SECURE;
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}
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if (sbp)
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(void) memcpy(sbp, &sb, sizeof(struct stat));
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}
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debug_return_int(ret);
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}
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/*
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* Verify that path is a regular file and not writable by other users.
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*/
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int
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sudo_secure_file_v1(const char *path, uid_t uid, gid_t gid, struct stat *sbp)
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{
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return sudo_secure_path(path, _S_IFREG, uid, gid, sbp);
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}
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/*
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* Verify that path is a directory and not writable by other users.
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*/
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int
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sudo_secure_dir_v1(const char *path, uid_t uid, gid_t gid, struct stat *sbp)
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{
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return sudo_secure_path(path, _S_IFDIR, uid, gid, sbp);
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}
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