1/*-
2 * Copyright (c) 2009-2011 Robert N. M. Watson
3 * Copyright (c) 2011 Jonathan Anderson
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28/*
29 * Test that fcntl works in capability mode.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <sys/types.h>
36#include <sys/capsicum.h>
37#include <sys/errno.h>
38#include <sys/ipc.h>
39#include <sys/mman.h>
40#include <sys/socket.h>
41#include <sys/stat.h>
42#include <sys/sysctl.h>
43#include <sys/wait.h>
44
45#include <err.h>
46#include <fcntl.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <unistd.h>
50
51#include "cap_test.h"
52
53/* A filename->descriptor mapping. */
54struct fd {
55	char	*f_name;
56	int	 f_fd;
57};
58
59/*
60 * Ensure that fcntl() works consistently for both regular file descriptors and
61 * capability-wrapped ones.
62 */
63int
64test_fcntl(void)
65{
66	int success = PASSED;
67	cap_rights_t rights = CAP_READ | CAP_FCNTL;
68
69	/*
70	 * Open some files of different types, and wrap them in capabilities.
71	 */
72	struct fd files[] = {
73		{ "file",         open("/etc/passwd", O_RDONLY) },
74		{ "socket",       socket(PF_LOCAL, SOCK_STREAM, 0) },
75		{ "SHM",          shm_open(SHM_ANON, O_RDWR, 0600) },
76	};
77	REQUIRE(files[0].f_fd);
78	REQUIRE(files[1].f_fd);
79	REQUIRE(files[2].f_fd);
80
81	struct fd caps[] = {
82		{ "file cap",     cap_new(files[0].f_fd, rights) },
83		{ "socket cap",   cap_new(files[1].f_fd, rights) },
84		{ "SHM cap",      cap_new(files[2].f_fd, rights) },
85	};
86	REQUIRE(caps[0].f_fd);
87	REQUIRE(caps[1].f_fd);
88	REQUIRE(caps[2].f_fd);
89
90	struct fd all[] = {
91		files[0], caps[0],
92		files[1], caps[1],
93		files[2], caps[2],
94	};
95	const size_t len = sizeof(all) / sizeof(struct fd);
96
97	REQUIRE(cap_enter());
98
99	/*
100	 * Ensure that we can fcntl() all the files that we opened above.
101	 */
102	for (size_t i = 0; i < len; i++)
103	{
104		struct fd f = all[i];
105		int cap;
106
107		CHECK_SYSCALL_SUCCEEDS(fcntl, f.f_fd, F_GETFL, 0);
108		REQUIRE(cap = cap_new(f.f_fd, CAP_READ));
109		if (fcntl(f.f_fd, F_GETFL, 0) == -1)
110			FAIL("Error calling fcntl('%s', F_GETFL)", f.f_name);
111		else
112			CHECK_NOTCAPABLE(fcntl, cap, F_GETFL, 0);
113	}
114
115	return (success);
116}
117
118