1 /*-
2  * Copyright (c) 2009-2011 Robert N. M. Watson
3  * Copyright (c) 2011 Jonathan Anderson
4  * Copyright (c) 2012 FreeBSD Foundation
5  * All rights reserved.
6  *
7  * Portions of this software were developed by Pawel Jakub Dawidek under
8  * sponsorship from the FreeBSD Foundation.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 /*
33  * Test whether various operations on capabilities are properly masked for
34  * various object types.
35  */
36 
37 #include <sys/param.h>
38 #include <sys/capsicum.h>
39 #include <sys/errno.h>
40 #include <sys/mman.h>
41 #include <sys/mount.h>
42 #include <sys/stat.h>
43 
44 #include <err.h>
45 #include <fcntl.h>
46 #include <poll.h>
47 #include <stdint.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <unistd.h>
52 
53 #include "cap_test.h"
54 
55 #define	SYSCALL_FAIL(syscall, message) \
56 	FAIL("%s:\t%s (rights 0x%jx)", #syscall, message, rights)
57 
58 /*
59  * Ensure that, if the capability had enough rights for the system call to
60  * pass, then it did. Otherwise, ensure that the errno is ENOTCAPABLE;
61  * capability restrictions should kick in before any other error logic.
62  */
63 #define	CHECK_RESULT(syscall, rights_needed, succeeded)	do {		\
64 	if ((rights & (rights_needed)) == (rights_needed)) {		\
65 		if (succeeded) {					\
66 			if (success == -1)				\
67 				success = PASSED;			\
68 		} else {						\
69 			SYSCALL_FAIL(syscall, "failed");		\
70 		}							\
71 	} else {							\
72 		if (succeeded) {					\
73 			FAILX("%s:\tsucceeded when it shouldn't have"	\
74 			    " (rights 0x%jx)", #syscall,		\
75 			    (uintmax_t)rights);				\
76 		} else if (errno != ENOTCAPABLE) {			\
77 			SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE");	\
78 		}							\
79 	}								\
80 	errno = 0;							\
81 } while (0)
82 
83 /*
84  * As above, but for the special mmap() case: unmap after successful mmap().
85  */
86 #define	CHECK_MMAP_RESULT(rights_needed)	do {			\
87 	if ((rights & (rights_needed)) == (rights_needed)) {		\
88 		if (p == MAP_FAILED)					\
89 			SYSCALL_FAIL(mmap, "failed");			\
90 		else {							\
91 			(void)munmap(p, getpagesize());			\
92 			if (success == -1)				\
93 				success = PASSED;			\
94 		}							\
95 	} else {							\
96 		if (p != MAP_FAILED) {					\
97 			FAILX("%s:\tsucceeded when it shouldn't have"	\
98 			    " (rights 0x%jx)", "mmap", rights);		\
99 			(void)munmap(p, getpagesize());			\
100 		} else if (errno != ENOTCAPABLE)			\
101 			SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE");	\
102 	}								\
103 	errno = 0;							\
104 } while (0)
105 
106 /*
107  * Given a file descriptor, create a capability with specific rights and
108  * make sure only those rights work.
109 */
110 static int
try_file_ops(int filefd,int dirfd,cap_rights_t rights)111 try_file_ops(int filefd, int dirfd, cap_rights_t rights)
112 {
113 	struct stat sb;
114 	struct statfs sf;
115 	cap_rights_t erights;
116 	int fd_cap, fd_capcap, dfd_cap;
117 	ssize_t ssize, ssize2;
118 	off_t off;
119 	void *p;
120 	char ch;
121 	int ret, is_nfs;
122 	struct pollfd pollfd;
123 	int success = -1;
124 
125 	REQUIRE(fstatfs(filefd, &sf));
126 	is_nfs = (strcmp("nfs", sf.f_fstypename) == 0);
127 
128 	REQUIRE(fd_cap = cap_new(filefd, rights));
129 	CHECK(cap_getrights(fd_cap, &erights) == 0);
130 	CHECK(rights == erights);
131 	REQUIRE(fd_capcap = cap_new(fd_cap, rights));
132 	CHECK(cap_getrights(fd_capcap, &erights) == 0);
133 	CHECK(rights == erights);
134 	CHECK(fd_capcap != fd_cap);
135 	REQUIRE(dfd_cap = cap_new(dirfd, rights));
136 	CHECK(cap_getrights(dfd_cap, &erights) == 0);
137 	CHECK(rights == erights);
138 
139 	ssize = read(fd_cap, &ch, sizeof(ch));
140 	CHECK_RESULT(read, CAP_READ, ssize >= 0);
141 
142 	ssize = write(fd_cap, &ch, sizeof(ch));
143 	CHECK_RESULT(write, CAP_WRITE, ssize >= 0);
144 
145 	off = lseek(fd_cap, 0, SEEK_SET);
146 	CHECK_RESULT(lseek, CAP_SEEK, off >= 0);
147 
148 	ssize = pread(fd_cap, &ch, sizeof(ch), 0);
149 	ssize2 = pread(fd_cap, &ch, sizeof(ch), 0);
150 	CHECK_RESULT(pread, CAP_PREAD, ssize >= 0);
151 	CHECK(ssize == ssize2);
152 
153 	ssize = pwrite(fd_cap, &ch, sizeof(ch), 0);
154 	CHECK_RESULT(pwrite, CAP_PWRITE, ssize >= 0);
155 
156 	p = mmap(NULL, getpagesize(), PROT_NONE, MAP_SHARED, fd_cap, 0);
157 	CHECK_MMAP_RESULT(CAP_MMAP);
158 
159 	p = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd_cap, 0);
160 	CHECK_MMAP_RESULT(CAP_MMAP_R);
161 
162 	p = mmap(NULL, getpagesize(), PROT_WRITE, MAP_SHARED, fd_cap, 0);
163 	CHECK_MMAP_RESULT(CAP_MMAP_W);
164 
165 	p = mmap(NULL, getpagesize(), PROT_EXEC, MAP_SHARED, fd_cap, 0);
166 	CHECK_MMAP_RESULT(CAP_MMAP_X);
167 
168 	p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED,
169 	    fd_cap, 0);
170 	CHECK_MMAP_RESULT(CAP_MMAP_RW);
171 
172 	p = mmap(NULL, getpagesize(), PROT_READ | PROT_EXEC, MAP_SHARED,
173 	    fd_cap, 0);
174 	CHECK_MMAP_RESULT(CAP_MMAP_RX);
175 
176 	p = mmap(NULL, getpagesize(), PROT_EXEC | PROT_WRITE, MAP_SHARED,
177 	    fd_cap, 0);
178 	CHECK_MMAP_RESULT(CAP_MMAP_WX);
179 
180 	p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE | PROT_EXEC,
181 	    MAP_SHARED, fd_cap, 0);
182 	CHECK_MMAP_RESULT(CAP_MMAP_RWX);
183 
184 	ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDONLY, 0600);
185 	CHECK_RESULT(openat(O_CREATE | O_RDONLY),
186 	    CAP_CREATE | CAP_READ | CAP_LOOKUP, ret >= 0);
187 	CHECK(ret == -1 || close(ret) == 0);
188 	CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0);
189 	ret = openat(dfd_cap, "cap_create", O_CREAT | O_WRONLY | O_APPEND,
190 	    0600);
191 	CHECK_RESULT(openat(O_CREATE | O_WRONLY | O_APPEND),
192 	    CAP_CREATE | CAP_WRITE | CAP_LOOKUP, ret >= 0);
193 	CHECK(ret == -1 || close(ret) == 0);
194 	CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0);
195 	ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDWR | O_APPEND, 0600);
196 	CHECK_RESULT(openat(O_CREATE | O_RDWR | O_APPEND),
197 	    CAP_CREATE | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0);
198 	CHECK(ret == -1 || close(ret) == 0);
199 	CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0);
200 
201 	ret = fsync(fd_cap);
202 	CHECK_RESULT(fsync, CAP_FSYNC, ret == 0);
203 
204 	ret = openat(dirfd, "cap_fsync", O_CREAT, 0600);
205 	CHECK(ret >= 0);
206 	CHECK(close(ret) == 0);
207 	ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDONLY);
208 	CHECK_RESULT(openat(O_FSYNC | O_RDONLY),
209 	    CAP_FSYNC | CAP_READ | CAP_LOOKUP, ret >= 0);
210 	CHECK(ret == -1 || close(ret) == 0);
211 	ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_WRONLY | O_APPEND);
212 	CHECK_RESULT(openat(O_FSYNC | O_WRONLY | O_APPEND),
213 	    CAP_FSYNC | CAP_WRITE | CAP_LOOKUP, ret >= 0);
214 	CHECK(ret == -1 || close(ret) == 0);
215 	ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDWR | O_APPEND);
216 	CHECK_RESULT(openat(O_FSYNC | O_RDWR | O_APPEND),
217 	    CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0);
218 	CHECK(ret == -1 || close(ret) == 0);
219 	ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDONLY);
220 	CHECK_RESULT(openat(O_SYNC | O_RDONLY),
221 	    CAP_FSYNC | CAP_READ | CAP_LOOKUP, ret >= 0);
222 	CHECK(ret == -1 || close(ret) == 0);
223 	ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_WRONLY | O_APPEND);
224 	CHECK_RESULT(openat(O_SYNC | O_WRONLY | O_APPEND),
225 	    CAP_FSYNC | CAP_WRITE | CAP_LOOKUP, ret >= 0);
226 	CHECK(ret == -1 || close(ret) == 0);
227 	ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDWR | O_APPEND);
228 	CHECK_RESULT(openat(O_SYNC | O_RDWR | O_APPEND),
229 	    CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0);
230 	CHECK(ret == -1 || close(ret) == 0);
231 	CHECK(unlinkat(dirfd, "cap_fsync", 0) == 0);
232 
233 	ret = ftruncate(fd_cap, 0);
234 	CHECK_RESULT(ftruncate, CAP_FTRUNCATE, ret == 0);
235 
236 	ret = openat(dirfd, "cap_ftruncate", O_CREAT, 0600);
237 	CHECK(ret >= 0);
238 	CHECK(close(ret) == 0);
239 	ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_RDONLY);
240 	CHECK_RESULT(openat(O_TRUNC | O_RDONLY),
241 	    CAP_FTRUNCATE | CAP_READ | CAP_LOOKUP, ret >= 0);
242 	CHECK(ret == -1 || close(ret) == 0);
243 	ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_WRONLY);
244 	CHECK_RESULT(openat(O_TRUNC | O_WRONLY),
245 	    CAP_FTRUNCATE | CAP_WRITE | CAP_LOOKUP, ret >= 0);
246 	CHECK(ret == -1 || close(ret) == 0);
247 	ret = openat(dfd_cap, "cap_ftruncate", O_TRUNC | O_RDWR);
248 	CHECK_RESULT(openat(O_TRUNC | O_RDWR),
249 	    CAP_FTRUNCATE | CAP_READ | CAP_WRITE | CAP_LOOKUP, ret >= 0);
250 	CHECK(ret == -1 || close(ret) == 0);
251 	CHECK(unlinkat(dirfd, "cap_ftruncate", 0) == 0);
252 
253 	ret = openat(dfd_cap, "cap_create", O_CREAT | O_WRONLY, 0600);
254 	CHECK_RESULT(openat(O_CREATE | O_WRONLY),
255 	    CAP_CREATE | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0);
256 	CHECK(ret == -1 || close(ret) == 0);
257 	CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0);
258 	ret = openat(dfd_cap, "cap_create", O_CREAT | O_RDWR, 0600);
259 	CHECK_RESULT(openat(O_CREATE | O_RDWR),
260 	    CAP_CREATE | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP,
261 	    ret >= 0);
262 	CHECK(ret == -1 || close(ret) == 0);
263 	CHECK(ret == -1 || unlinkat(dirfd, "cap_create", 0) == 0);
264 
265 	ret = openat(dirfd, "cap_fsync", O_CREAT, 0600);
266 	CHECK(ret >= 0);
267 	CHECK(close(ret) == 0);
268 	ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_WRONLY);
269 	CHECK_RESULT(openat(O_FSYNC | O_WRONLY),
270 	    CAP_FSYNC | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0);
271 	CHECK(ret == -1 || close(ret) == 0);
272 	ret = openat(dfd_cap, "cap_fsync", O_FSYNC | O_RDWR);
273 	CHECK_RESULT(openat(O_FSYNC | O_RDWR),
274 	    CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0);
275 	CHECK(ret == -1 || close(ret) == 0);
276 	ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_WRONLY);
277 	CHECK_RESULT(openat(O_SYNC | O_WRONLY),
278 	    CAP_FSYNC | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0);
279 	CHECK(ret == -1 || close(ret) == 0);
280 	ret = openat(dfd_cap, "cap_fsync", O_SYNC | O_RDWR);
281 	CHECK_RESULT(openat(O_SYNC | O_RDWR),
282 	    CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_SEEK | CAP_LOOKUP, ret >= 0);
283 	CHECK(ret == -1 || close(ret) == 0);
284 	CHECK(unlinkat(dirfd, "cap_fsync", 0) == 0);
285 
286 	/*
287 	 * Note: this is not expected to work over NFS.
288 	 */
289 	ret = fchflags(fd_cap, UF_NODUMP);
290 	CHECK_RESULT(fchflags, CAP_FCHFLAGS,
291 	    ret == 0 || (is_nfs && errno == EOPNOTSUPP));
292 
293 	ret = openat(dirfd, "cap_chflagsat", O_CREAT, 0600);
294 	CHECK(ret >= 0);
295 	CHECK(close(ret) == 0);
296 	ret = chflagsat(dfd_cap, "cap_chflagsat", UF_NODUMP, 0);
297 	CHECK_RESULT(chflagsat, CAP_CHFLAGSAT | CAP_LOOKUP, ret == 0);
298 	CHECK(unlinkat(dirfd, "cap_chflagsat", 0) == 0);
299 
300 	ret = fchown(fd_cap, -1, -1);
301 	CHECK_RESULT(fchown, CAP_FCHOWN, ret == 0);
302 
303 	ret = openat(dirfd, "cap_fchownat", O_CREAT, 0600);
304 	CHECK(ret >= 0);
305 	CHECK(close(ret) == 0);
306 	ret = fchownat(dfd_cap, "cap_fchownat", -1, -1, 0);
307 	CHECK_RESULT(fchownat, CAP_FCHOWN | CAP_LOOKUP, ret == 0);
308 	CHECK(unlinkat(dirfd, "cap_fchownat", 0) == 0);
309 
310 	ret = fchmod(fd_cap, 0644);
311 	CHECK_RESULT(fchmod, CAP_FCHMOD, ret == 0);
312 
313 	ret = openat(dirfd, "cap_fchmodat", O_CREAT, 0600);
314 	CHECK(ret >= 0);
315 	CHECK(close(ret) == 0);
316 	ret = fchmodat(dfd_cap, "cap_fchmodat", 0600, 0);
317 	CHECK_RESULT(fchmodat, CAP_FCHMOD | CAP_LOOKUP, ret == 0);
318 	CHECK(unlinkat(dirfd, "cap_fchmodat", 0) == 0);
319 
320 	ret = fcntl(fd_cap, F_GETFL);
321 	CHECK_RESULT(fcntl(F_GETFL), CAP_FCNTL, ret >= 0);
322 	ret = fcntl(fd_cap, F_SETFL, ret);
323 	CHECK_RESULT(fcntl(F_SETFL), CAP_FCNTL, ret == 0);
324 
325 	/* XXX flock */
326 
327 	ret = fstat(fd_cap, &sb);
328 	CHECK_RESULT(fstat, CAP_FSTAT, ret == 0);
329 
330 	ret = openat(dirfd, "cap_fstatat", O_CREAT, 0600);
331 	CHECK(ret >= 0);
332 	CHECK(close(ret) == 0);
333 	ret = fstatat(dfd_cap, "cap_fstatat", &sb, 0);
334 	CHECK_RESULT(fstatat, CAP_FSTAT | CAP_LOOKUP, ret == 0);
335 	CHECK(unlinkat(dirfd, "cap_fstatat", 0) == 0);
336 
337 	ret = fstatfs(fd_cap, &sf);
338 	CHECK_RESULT(fstatfs, CAP_FSTATFS, ret == 0);
339 
340 	ret = fpathconf(fd_cap, _PC_NAME_MAX);
341 	CHECK_RESULT(fpathconf, CAP_FPATHCONF, ret >= 0);
342 
343 	ret = futimes(fd_cap, NULL);
344 	CHECK_RESULT(futimes, CAP_FUTIMES, ret == 0);
345 
346 	ret = openat(dirfd, "cap_futimesat", O_CREAT, 0600);
347 	CHECK(ret >= 0);
348 	CHECK(close(ret) == 0);
349 	ret = futimesat(dfd_cap, "cap_futimesat", NULL);
350 	CHECK_RESULT(futimesat, CAP_FUTIMES | CAP_LOOKUP, ret == 0);
351 	CHECK(unlinkat(dirfd, "cap_futimesat", 0) == 0);
352 
353 	ret = openat(dirfd, "cap_linkat_src", O_CREAT, 0600);
354 	CHECK(ret >= 0);
355 	CHECK(close(ret) == 0);
356 	ret = linkat(dirfd, "cap_linkat_src", dfd_cap, "cap_linkat_dst", 0);
357 	CHECK_RESULT(linkat, CAP_LINKAT | CAP_LOOKUP, ret == 0);
358 	CHECK(unlinkat(dirfd, "cap_linkat_src", 0) == 0);
359 	CHECK(ret == -1 || unlinkat(dirfd, "cap_linkat_dst", 0) == 0);
360 
361 	ret = mkdirat(dfd_cap, "cap_mkdirat", 0700);
362 	CHECK_RESULT(mkdirat, CAP_MKDIRAT | CAP_LOOKUP, ret == 0);
363 	CHECK(ret == -1 || unlinkat(dirfd, "cap_mkdirat", AT_REMOVEDIR) == 0);
364 
365 	ret = mkfifoat(dfd_cap, "cap_mkfifoat", 0600);
366 	CHECK_RESULT(mkfifoat, CAP_MKFIFOAT | CAP_LOOKUP, ret == 0);
367 	CHECK(ret == -1 || unlinkat(dirfd, "cap_mkfifoat", 0) == 0);
368 
369 	ret = mknodat(dfd_cap, "cap_mknodat", S_IFCHR | 0600, 0);
370 	CHECK_RESULT(mknodat, CAP_MKNODAT | CAP_LOOKUP, ret == 0);
371 	CHECK(ret == -1 || unlinkat(dirfd, "cap_mknodat", 0) == 0);
372 
373 	/* TODO: renameat(2) */
374 
375 	ret = symlinkat("test", dfd_cap, "cap_symlinkat");
376 	CHECK_RESULT(symlinkat, CAP_SYMLINKAT | CAP_LOOKUP, ret == 0);
377 	CHECK(ret == -1 || unlinkat(dirfd, "cap_symlinkat", 0) == 0);
378 
379 	ret = openat(dirfd, "cap_unlinkat", O_CREAT, 0600);
380 	CHECK(ret >= 0);
381 	CHECK(close(ret) == 0);
382 	ret = unlinkat(dfd_cap, "cap_unlinkat", 0);
383 	CHECK_RESULT(unlinkat, CAP_UNLINKAT | CAP_LOOKUP, ret == 0);
384 	CHECK(ret == 0 || unlinkat(dirfd, "cap_unlinkat", 0) == 0);
385 	ret = mkdirat(dirfd, "cap_unlinkat", 0700);
386 	CHECK(ret == 0);
387 	ret = unlinkat(dfd_cap, "cap_unlinkat", AT_REMOVEDIR);
388 	CHECK_RESULT(unlinkat, CAP_UNLINKAT | CAP_LOOKUP, ret == 0);
389 	CHECK(ret == 0 || unlinkat(dirfd, "cap_unlinkat", AT_REMOVEDIR) == 0);
390 
391 	pollfd.fd = fd_cap;
392 	pollfd.events = POLLIN | POLLERR | POLLHUP;
393 	pollfd.revents = 0;
394 
395 	ret = poll(&pollfd, 1, 0);
396 	if (rights & CAP_EVENT)
397 		CHECK((pollfd.revents & POLLNVAL) == 0);
398 	else
399 		CHECK((pollfd.revents & POLLNVAL) != 0);
400 
401 	/* XXX: select, kqueue */
402 
403 	close(fd_cap);
404 	close(fd_capcap);
405 
406 	if (success == -1) {
407 		fprintf(stderr, "No tests for rights 0x%jx.\n",
408 		    (uintmax_t)rights);
409 		success = FAILED;
410 	}
411 	return (success);
412 }
413 
414 #define TRY(rights) \
415 do { \
416 	if (success == PASSED) \
417 		success = try_file_ops(filefd, dirfd, (rights)); \
418 	else \
419 		/* We've already failed, but try the test anyway. */ \
420 		try_file_ops(filefd, dirfd, (rights)); \
421 } while (0)
422 
423 #define	KEEP_ERRNO(...)	do {						\
424 	int _saved_errno = errno;					\
425 	__VA_ARGS__;							\
426 	errno = _saved_errno;						\
427 } while (0);
428 
429 int
test_capabilities(void)430 test_capabilities(void)
431 {
432 	int filefd, dirfd, tmpfd;
433 	int success = PASSED;
434 	char file[] = "/tmp/cap_test.XXXXXXXXXX";
435 	char dir[] = "/tmp/cap_test.XXXXXXXXXX";
436 
437 	filefd = mkstemp(file);
438 	if (filefd < 0)
439 		err(-1, "mkstemp");
440 	if (mkdtemp(dir) == NULL) {
441 		KEEP_ERRNO(unlink(file));
442 		err(-1, "mkdtemp");
443 	}
444 	dirfd = open(dir, O_RDONLY | O_DIRECTORY);
445 	if (dirfd == -1) {
446 		KEEP_ERRNO(unlink(file));
447 		KEEP_ERRNO(rmdir(dir));
448 		err(-1, "open");
449 	}
450 	tmpfd = open("/tmp", O_RDONLY | O_DIRECTORY);
451 	if (tmpfd == -1) {
452 		KEEP_ERRNO(unlink(file));
453 		KEEP_ERRNO(rmdir(dir));
454 		err(-1, "open");
455 	}
456 
457 	if (cap_enter() == -1) {
458 		KEEP_ERRNO(unlink(file));
459 		KEEP_ERRNO(rmdir(dir));
460 		err(-1, "cap_enter");
461 	}
462 
463 	TRY(CAP_READ);
464 	TRY(CAP_WRITE);
465 	TRY(CAP_SEEK);
466 	TRY(CAP_PREAD);
467 	TRY(CAP_PWRITE);
468 	TRY(CAP_READ | CAP_WRITE);
469 	TRY(CAP_PREAD | CAP_PWRITE);
470 	TRY(CAP_MMAP);
471 	TRY(CAP_MMAP_R);
472 	TRY(CAP_MMAP_W);
473 	TRY(CAP_MMAP_X);
474 	TRY(CAP_MMAP_RW);
475 	TRY(CAP_MMAP_RX);
476 	TRY(CAP_MMAP_WX);
477 	TRY(CAP_MMAP_RWX);
478 	TRY(CAP_CREATE | CAP_READ | CAP_LOOKUP);
479 	TRY(CAP_CREATE | CAP_WRITE | CAP_LOOKUP);
480 	TRY(CAP_CREATE | CAP_READ | CAP_WRITE | CAP_LOOKUP);
481 #ifdef TODO
482 	TRY(CAP_FEXECVE);
483 #endif
484 	TRY(CAP_FSYNC);
485 	TRY(CAP_FSYNC | CAP_READ | CAP_LOOKUP);
486 	TRY(CAP_FSYNC | CAP_WRITE | CAP_LOOKUP);
487 	TRY(CAP_FSYNC | CAP_READ | CAP_WRITE | CAP_LOOKUP);
488 	TRY(CAP_FTRUNCATE);
489 	TRY(CAP_FTRUNCATE | CAP_READ | CAP_LOOKUP);
490 	TRY(CAP_FTRUNCATE | CAP_WRITE | CAP_LOOKUP);
491 	TRY(CAP_FTRUNCATE | CAP_READ | CAP_WRITE | CAP_LOOKUP);
492 #ifdef TODO
493 	TRY(CAP_FCHDIR);
494 #endif
495 	TRY(CAP_FCHFLAGS);
496 	TRY(CAP_FCHOWN);
497 	TRY(CAP_FCHOWN | CAP_LOOKUP);
498 	TRY(CAP_FCHMOD | CAP_LOOKUP);
499 	TRY(CAP_FCNTL);
500 #ifdef TODO
501 	TRY(CAP_FLOCK);
502 #endif
503 	TRY(CAP_FPATHCONF);
504 #ifdef TODO
505 	TRY(CAP_FSCK);
506 #endif
507 	TRY(CAP_FSTAT | CAP_LOOKUP);
508 	TRY(CAP_FSTATFS);
509 	TRY(CAP_FUTIMES | CAP_LOOKUP);
510 	TRY(CAP_LINKAT | CAP_LOOKUP);
511 	TRY(CAP_MKDIRAT | CAP_LOOKUP);
512 	TRY(CAP_MKFIFOAT | CAP_LOOKUP);
513 	TRY(CAP_MKNODAT | CAP_LOOKUP);
514 	TRY(CAP_SYMLINKAT | CAP_LOOKUP);
515 	TRY(CAP_UNLINKAT | CAP_LOOKUP);
516 	/* Rename needs CAP_RENAMEAT on source directory and CAP_LINKAT on destination directory. */
517 	TRY(CAP_RENAMEAT | CAP_UNLINKAT | CAP_LOOKUP);
518 #ifdef TODO
519 	TRY(CAP_LOOKUP);
520 	TRY(CAP_EXTATTR_DELETE);
521 	TRY(CAP_EXTATTR_GET);
522 	TRY(CAP_EXTATTR_LIST);
523 	TRY(CAP_EXTATTR_SET);
524 	TRY(CAP_ACL_CHECK);
525 	TRY(CAP_ACL_DELETE);
526 	TRY(CAP_ACL_GET);
527 	TRY(CAP_ACL_SET);
528 	TRY(CAP_ACCEPT);
529 	TRY(CAP_BIND);
530 	TRY(CAP_CONNECT);
531 	TRY(CAP_GETPEERNAME);
532 	TRY(CAP_GETSOCKNAME);
533 	TRY(CAP_GETSOCKOPT);
534 	TRY(CAP_LISTEN);
535 	TRY(CAP_PEELOFF);
536 	TRY(CAP_RECV);
537 	TRY(CAP_SEND);
538 	TRY(CAP_SETSOCKOPT);
539 	TRY(CAP_SHUTDOWN);
540 	TRY(CAP_MAC_GET);
541 	TRY(CAP_MAC_SET);
542 	TRY(CAP_SEM_GETVALUE);
543 	TRY(CAP_SEM_POST);
544 	TRY(CAP_SEM_WAIT);
545 	TRY(CAP_POST_EVENT);
546 	TRY(CAP_EVENT);
547 	TRY(CAP_IOCTL);
548 	TRY(CAP_TTYHOOK);
549 	TRY(CAP_PDGETPID);
550 	TRY(CAP_PDWAIT);
551 	TRY(CAP_PDKILL);
552 #endif
553 
554 	(void)unlinkat(tmpfd, file + strlen("/tmp/"), 0);
555 	(void)unlinkat(tmpfd, dir + strlen("/tmp/"), AT_REMOVEDIR);
556 
557 	return (success);
558 }
559