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usr / src / contrib / openpam / lib / libpam /

📁 ..
📄 Makefile.am(2.07 KB)
📄 Makefile.in(34.58 KB)
📄 openpam_asprintf.c(1.99 KB)
📄 openpam_asprintf.h(1.78 KB)
📄 openpam_borrow_cred.c(3.8 KB)
📄 openpam_check_owner_perms.c(3.94 KB)
📄 openpam_configure.c(12.26 KB)
📄 openpam_constants.c(7.07 KB)
📄 openpam_constants.h(2.09 KB)
📄 openpam_cred.h(2.12 KB)
📄 openpam_ctype.h(3.15 KB)
📄 openpam_debug.h(3.87 KB)
📄 openpam_dispatch.c(6.77 KB)
📄 openpam_dlfunc.h(1.79 KB)
📄 openpam_dynamic.c(6.91 KB)
📄 openpam_features.c(2.42 KB)
📄 openpam_features.h(1.87 KB)
📄 openpam_findenv.c(2.37 KB)
📄 openpam_free_data.c(2.43 KB)
📄 openpam_free_envlist.c(2.16 KB)
📄 openpam_get_feature.c(3.03 KB)
📄 openpam_get_option.c(2.85 KB)
📄 openpam_impl.h(4.28 KB)
📄 openpam_load.c(3.6 KB)
📄 openpam_log.c(4.57 KB)
📄 openpam_nullconv.c(2.93 KB)
📄 openpam_readline.c(3.8 KB)
📄 openpam_readlinev.c(4.99 KB)
📄 openpam_readword.c(6.58 KB)
📄 openpam_restore_cred.c(2.93 KB)
📄 openpam_set_feature.c(2.28 KB)
📄 openpam_set_option.c(3.51 KB)
📄 openpam_static.c(2.39 KB)
📄 openpam_straddch.c(3.75 KB)
📄 openpam_strlcat.c(2 KB)
📄 openpam_strlcat.h(1.78 KB)
📄 openpam_strlcmp.h(1.93 KB)
📄 openpam_strlcpy.c(1.95 KB)
📄 openpam_strlcpy.h(1.78 KB)
📄 openpam_strlset.c(2.01 KB)
📄 openpam_strlset.h(1.77 KB)
📄 openpam_subst.c(4.56 KB)
📄 openpam_ttyconv.c(9.95 KB)
📄 openpam_vasprintf.c(2.14 KB)
📄 openpam_vasprintf.h(1.79 KB)
📄 pam_acct_mgmt.c(2.74 KB)
📄 pam_authenticate.c(3.13 KB)
📄 pam_authenticate_secondary.c(2.34 KB)
📄 pam_chauthtok.c(3.12 KB)
📄 pam_close_session.c(2.73 KB)
📄 pam_end.c(3.02 KB)
📄 pam_error.c(2.65 KB)
📄 pam_get_authtok.c(7.76 KB)
📄 pam_get_data.c(2.94 KB)
📄 pam_get_item.c(3.9 KB)
📄 pam_get_mapped_authtok.c(2.33 KB)
📄 pam_get_mapped_username.c(2.35 KB)
📄 pam_get_user.c(4.58 KB)
📄 pam_getenv.c(2.75 KB)
📄 pam_getenvlist.c(3.33 KB)
📄 pam_info.c(2.66 KB)
📄 pam_open_session.c(2.77 KB)
📄 pam_prompt.c(2.82 KB)
📄 pam_putenv.c(3.35 KB)
📄 pam_set_data.c(3.36 KB)
📄 pam_set_item.c(3.52 KB)
📄 pam_set_mapped_authtok.c(2.33 KB)
📄 pam_set_mapped_username.c(2.29 KB)
📄 pam_setcred.c(3.08 KB)
📄 pam_setenv.c(3.01 KB)
📄 pam_sm_acct_mgmt.c(2.58 KB)
📄 pam_sm_authenticate.c(2.61 KB)
📄 pam_sm_authenticate_secondary.c(2.44 KB)
📄 pam_sm_chauthtok.c(2.82 KB)
📄 pam_sm_close_session.c(2.54 KB)
📄 pam_sm_get_mapped_authtok.c(2.42 KB)
📄 pam_sm_get_mapped_username.c(2.43 KB)
📄 pam_sm_open_session.c(2.53 KB)
📄 pam_sm_set_mapped_authtok.c(2.42 KB)
📄 pam_sm_set_mapped_username.c(2.36 KB)
📄 pam_sm_setcred.c(2.57 KB)
📄 pam_start.c(3.78 KB)
📄 pam_strerror.c(2.72 KB)
📄 pam_verror.c(2.58 KB)
📄 pam_vinfo.c(2.58 KB)
📄 pam_vprompt.c(3.98 KB)

Editing: openpam_check_owner_perms.c

/*-
 * Copyright (c) 2011 Dag-Erling Smørgrav
 * 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. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $OpenPAM: openpam_check_owner_perms.c 938 2017-04-30 21:34:42Z des $
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <sys/types.h>
#include <sys/stat.h>

#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <security/pam_appl.h>

#include "openpam_impl.h"

/*
 * OpenPAM internal
 *
 * Verify that the file or directory referenced by the given descriptor is
 * owned by either root or the arbitrator and that it is not writable by
 * group or other.
 */

int
openpam_check_desc_owner_perms(const char *name, int fd)
{
	uid_t root, arbitrator;
	struct stat sb;
	int serrno;

root = 0;
	arbitrator = geteuid();
	if (fstat(fd, &sb) != 0) {
		serrno = errno;
		openpam_log(PAM_LOG_ERROR, "%s: %m", name);
		errno = serrno;
		return (-1);
	}
	if (!S_ISREG(sb.st_mode)) {
		openpam_log(PAM_LOG_ERROR,
		    "%s: not a regular file", name);
		errno = EINVAL;
		return (-1);
	}
	if ((sb.st_uid != root && sb.st_uid != arbitrator) ||
	    (sb.st_mode & (S_IWGRP|S_IWOTH)) != 0) {
		openpam_log(PAM_LOG_ERROR,
		    "%s: insecure ownership or permissions", name);
		errno = EPERM;
		return (-1);
	}
	return (0);
}

/*
 * OpenPAM internal
 *
 * Verify that a file or directory and all components of the path leading
 * up to it are owned by either root or the arbitrator and that they are
 * not writable by group or other.
 *
 * Note that openpam_check_desc_owner_perms() should be used instead if
 * possible to avoid a race between the ownership / permission check and
 * the actual open().
 */

int
openpam_check_path_owner_perms(const char *path)
{
	uid_t root, arbitrator;
	char pathbuf[PATH_MAX];
	struct stat sb;
	int len, serrno, tip;

tip = 1;
	root = 0;
	arbitrator = geteuid();
	if (realpath(path, pathbuf) == NULL)
		return (-1);
	len = strlen(pathbuf);
	while (len > 0) {
		if (stat(pathbuf, &sb) != 0) {
			if (errno != ENOENT) {
				serrno = errno;
				openpam_log(PAM_LOG_ERROR, "%s: %m", pathbuf);
				errno = serrno;
			}
			return (-1);
		}
		if (tip && !S_ISREG(sb.st_mode)) {
			openpam_log(PAM_LOG_ERROR,
			    "%s: not a regular file", pathbuf);
			errno = EINVAL;
			return (-1);
		}
		if ((sb.st_uid != root && sb.st_uid != arbitrator) ||
		    (sb.st_mode & (S_IWGRP|S_IWOTH)) != 0) {
			openpam_log(PAM_LOG_ERROR,
			    "%s: insecure ownership or permissions", pathbuf);
			errno = EPERM;
			return (-1);
		}
		while (--len > 0 && pathbuf[len] != '/')
			pathbuf[len] = '\0';
		tip = 0;
	}
	return (0);
}

/*
 * NOPARSE
 */

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Editing: openpam_check_owner_perms.c

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