diff options
Diffstat (limited to 'tools/regression/priv/priv_vfs_read_write.c')
| -rw-r--r-- | tools/regression/priv/priv_vfs_read_write.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/tools/regression/priv/priv_vfs_read_write.c b/tools/regression/priv/priv_vfs_read_write.c new file mode 100644 index 0000000..c7f479d --- /dev/null +++ b/tools/regression/priv/priv_vfs_read_write.c @@ -0,0 +1,370 @@ +/*- + * Copyright (c) 2006 nCircle Network Security, Inc. + * All rights reserved. + * + * This software was developed by Robert N. M. Watson for the TrustedBSD + * Project under contract to nCircle Network Security, Inc. + * + * 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. + * + * 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, NCIRCLE NETWORK SECURITY, + * INC., 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. + * + * $FreeBSD$ + */ + +/* + * This is a joint test of both the read and write privileges with respect to + * discretionary file system access control (permissions). Only permissions, + * not ACL semantics, and only privilege-related checks are performed. + */ + +#include <sys/types.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "main.h" + +struct test_arguments { + int open_flags; + uid_t proc_uid; + gid_t proc_gid; + uid_t file_uid; + gid_t file_gid; +}; + +/* + * Rather special-purpose, don't reuse. Will need updating if anything other + * than O_RDONLY and O_WRONLY are to be used in tests. + */ +static const char * +flags_to_string(int flags) +{ + + switch (flags) { + case O_RDONLY: + return ("O_RDONLY"); + + case O_WRONLY: + return ("O_WRONLY"); + + default: + return ("unknown"); + } +} + +static void +test_perm(struct test_arguments ta, mode_t file_mode, int expected) +{ + uid_t proc_uid, file_uid; + gid_t proc_gid, file_gid; + int fd, open_flags; + char fpath[1024]; + + proc_uid = ta.proc_uid; + proc_gid = ta.proc_gid; + file_uid = ta.file_uid; + file_gid = ta.file_gid; + open_flags = ta.open_flags; + + setup_file(fpath, file_uid, file_gid, file_mode); + set_creds(proc_uid, proc_gid); + + fd = open(fpath, open_flags); + + if (expected == 0) { + if (fd <= 0) { + warn("test_perm(%s, %d, %d, %d, %d, %04o, %d) " + "returned %d instead of %d", + flags_to_string(open_flags), proc_uid, proc_gid, + file_uid, file_gid, file_mode, expected, + errno, expected); + restore_creds(); + (void)unlink(fpath); + exit(-1); + } + close(fd); + } else { + if (fd >= 0) { + warnx("test_perm(%s, %d, %d, %d, %d, %04o, %d)" + " returned 0 instead of %d", + flags_to_string(open_flags), proc_uid, proc_gid, + file_uid, file_gid, file_mode, expected, + expected); + close(fd); + restore_creds(); + (void)unlink(fpath); + exit(-1); + } else if (errno != expected) { + warn("test_perm(%s, %d, %d, %d, %d, %04o, %d)" + " returned %d instead of %d", + flags_to_string(open_flags), proc_uid, proc_gid, + file_uid, file_gid, file_mode, expected, + errno, expected); + restore_creds(); + (void)unlink(fpath); + exit(-1); + } + } + + restore_creds(); + (void)unlink(fpath); +} + +static const gid_t gidset[] = { GID_WHEEL }; + +static void +preamble(void) +{ + + if (getuid() != UID_ROOT) + errx(-1, "must be run as root"); + if (setgroups(1, gidset) < 0) + err(-1, "setgroups(1, {%d})", GID_WHEEL); +} + +void +priv_vfs_read(void) +{ + struct test_arguments ta; + + preamble(); + + ta.open_flags = O_RDONLY; + + /* + * Privileged user and file owner. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_ROOT; + ta.file_gid = GID_WHEEL; + + test_perm(ta, 0000, 0); + test_perm(ta, 0100, 0); + test_perm(ta, 0200, 0); + test_perm(ta, 0300, 0); + test_perm(ta, 0400, 0); + test_perm(ta, 0500, 0); + test_perm(ta, 0600, 0); + test_perm(ta, 0700, 0); + + /* + * Privileged user and file group. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_WHEEL; + + test_perm(ta, 0000, 0); + test_perm(ta, 0010, 0); + test_perm(ta, 0020, 0); + test_perm(ta, 0030, 0); + test_perm(ta, 0040, 0); + test_perm(ta, 0050, 0); + test_perm(ta, 0060, 0); + test_perm(ta, 0070, 0); + + /* + * Privileged user and file other. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, 0); + test_perm(ta, 0001, 0); + test_perm(ta, 0002, 0); + test_perm(ta, 0003, 0); + test_perm(ta, 0004, 0); + test_perm(ta, 0005, 0); + test_perm(ta, 0006, 0); + test_perm(ta, 0007, 0); + + /* + * Unprivileged user and file owner. Various DAC failures. + */ + ta.proc_uid = UID_OWNER; + ta.proc_gid = GID_OWNER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0100, EACCES); + test_perm(ta, 0200, EACCES); + test_perm(ta, 0300, EACCES); + test_perm(ta, 0400, 0); + test_perm(ta, 0500, 0); + test_perm(ta, 0600, 0); + test_perm(ta, 0700, 0); + + /* + * Unprivileged user and file group. Various DAC failures. + */ + ta.proc_uid = UID_OTHER; + ta.proc_gid = GID_OWNER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0010, EACCES); + test_perm(ta, 0020, EACCES); + test_perm(ta, 0030, EACCES); + test_perm(ta, 0040, 0); + test_perm(ta, 0050, 0); + test_perm(ta, 0060, 0); + test_perm(ta, 0070, 0); + + /* + * Unprivileged user and file other. Various DAC failures. + */ + ta.proc_uid = UID_OTHER; + ta.proc_gid = GID_OTHER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0001, EACCES); + test_perm(ta, 0002, EACCES); + test_perm(ta, 0003, EACCES); + test_perm(ta, 0004, 0); + test_perm(ta, 0005, 0); + test_perm(ta, 0006, 0); + test_perm(ta, 0007, 0); +} + +void +priv_vfs_write(void) +{ + struct test_arguments ta; + + preamble(); + + ta.open_flags = O_WRONLY; + + /* + * Privileged user and file owner. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_ROOT; + ta.file_gid = GID_WHEEL; + + test_perm(ta, 0000, 0); + test_perm(ta, 0100, 0); + test_perm(ta, 0200, 0); + test_perm(ta, 0300, 0); + test_perm(ta, 0400, 0); + test_perm(ta, 0500, 0); + test_perm(ta, 0600, 0); + test_perm(ta, 0700, 0); + + /* + * Privileged user and file group. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_WHEEL; + + test_perm(ta, 0000, 0); + test_perm(ta, 0010, 0); + test_perm(ta, 0020, 0); + test_perm(ta, 0030, 0); + test_perm(ta, 0040, 0); + test_perm(ta, 0050, 0); + test_perm(ta, 0060, 0); + test_perm(ta, 0070, 0); + + /* + * Privileged user and file other. All tests should pass. + */ + ta.proc_uid = UID_ROOT; + ta.proc_gid = GID_WHEEL; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, 0); + test_perm(ta, 0001, 0); + test_perm(ta, 0002, 0); + test_perm(ta, 0003, 0); + test_perm(ta, 0004, 0); + test_perm(ta, 0005, 0); + test_perm(ta, 0006, 0); + test_perm(ta, 0007, 0); + + /* + * Unprivileged user and file owner. Various DAC failures. + */ + ta.proc_uid = UID_OWNER; + ta.proc_gid = GID_OWNER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0100, EACCES); + test_perm(ta, 0200, 0); + test_perm(ta, 0300, 0); + test_perm(ta, 0400, EACCES); + test_perm(ta, 0500, EACCES); + test_perm(ta, 0600, 0); + test_perm(ta, 0700, 0); + + /* + * Unprivileged user and file group. Various DAC failures. + */ + ta.proc_uid = UID_OTHER; + ta.proc_gid = GID_OWNER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0010, EACCES); + test_perm(ta, 0020, 0); + test_perm(ta, 0030, 0); + test_perm(ta, 0040, EACCES); + test_perm(ta, 0050, EACCES); + test_perm(ta, 0060, 0); + test_perm(ta, 0070, 0); + + /* + * Unprivileged user and file other. Various DAC failures. + */ + ta.proc_uid = UID_OTHER; + ta.proc_gid = GID_OTHER; + ta.file_uid = UID_OWNER; + ta.file_gid = GID_OWNER; + + test_perm(ta, 0000, EACCES); + test_perm(ta, 0001, EACCES); + test_perm(ta, 0002, 0); + test_perm(ta, 0003, 0); + test_perm(ta, 0004, EACCES); + test_perm(ta, 0005, EACCES); + test_perm(ta, 0006, 0); + test_perm(ta, 0007, 0); +} |
