diff options
author | jonathan <jonathan@FreeBSD.org> | 2011-08-04 17:17:57 +0000 |
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committer | jonathan <jonathan@FreeBSD.org> | 2011-08-04 17:17:57 +0000 |
commit | b8d933f326d0bf09cbb8b2b81f149adbaa2671f4 (patch) | |
tree | 888c9f60e29576ce20ba2d04543a2d7ae318d4ad /tools/regression/security/cap_test | |
parent | d79af2f3c2f2321d09a2ee06d386c5a1a4a7f478 (diff) | |
download | FreeBSD-src-b8d933f326d0bf09cbb8b2b81f149adbaa2671f4.zip FreeBSD-src-b8d933f326d0bf09cbb8b2b81f149adbaa2671f4.tar.gz |
Flesh out the cap_test regression test.
Add more regression testing, some of which is expected to fail until we
commit more kernel implementation.
Approved by: re (kib), mentor (rwatson)
Sponsored by: Google Inc
Diffstat (limited to 'tools/regression/security/cap_test')
-rw-r--r-- | tools/regression/security/cap_test/cap_test.t | 11 | ||||
-rw-r--r-- | tools/regression/security/cap_test/cap_test_capabilities.c | 260 | ||||
-rw-r--r-- | tools/regression/security/cap_test/cap_test_fcntl.c | 117 |
3 files changed, 388 insertions, 0 deletions
diff --git a/tools/regression/security/cap_test/cap_test.t b/tools/regression/security/cap_test/cap_test.t new file mode 100644 index 0000000..8185161 --- /dev/null +++ b/tools/regression/security/cap_test/cap_test.t @@ -0,0 +1,11 @@ +#!/bin/sh +# +# $FreeBSD$ +# + +if test -z "${DIR}" ; then DIR=$( make -V .OBJDIR ); fi +if test -z "${DIR}" ; then DIR=$( dirname $0 ); fi + +make > /dev/null || exit 1 +$DIR/cap_test $* + diff --git a/tools/regression/security/cap_test/cap_test_capabilities.c b/tools/regression/security/cap_test/cap_test_capabilities.c new file mode 100644 index 0000000..444bcbd --- /dev/null +++ b/tools/regression/security/cap_test/cap_test_capabilities.c @@ -0,0 +1,260 @@ +/*- + * Copyright (c) 2009-2011 Robert N. M. Watson + * Copyright (c) 2011 Jonathan Anderson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Test whether various operations on capabilities are properly masked for + * various object types. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/capability.h> +#include <sys/errno.h> +#include <sys/mman.h> +#include <sys/mount.h> +#include <sys/stat.h> + +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "cap_test.h" + +#define SYSCALL_FAIL(syscall, message) \ + FAIL("%s:\t%s (rights 0x%jx)", #syscall, message, rights) + +/* + * Ensure that, if the capability had enough rights for the system call to + * pass, then it did. Otherwise, ensure that the errno is ENOTCAPABLE; + * capability restrictions should kick in before any other error logic. + */ +#define CHECK_RESULT(syscall, rights_needed, succeeded) do { \ + if ((rights & (rights_needed)) == (rights_needed)) { \ + if (!(succeeded)) \ + SYSCALL_FAIL(syscall, "failed"); \ + } else { \ + if (succeeded) \ + FAILX("%s:\tsucceeded when it shouldn't have" \ + " (rights 0x%jx)", #syscall, rights); \ + else if (errno != ENOTCAPABLE) \ + SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE"); \ + } \ +} while (0) + +/* + * As above, but for the special mmap() case: unmap after successful mmap(). + */ +#define CHECK_MMAP_RESULT(rights_needed) do { \ + if ((rights & (rights_needed)) == (rights_needed)) { \ + if (p == MAP_FAILED) \ + SYSCALL_FAIL(mmap, "failed"); \ + else \ + (void)munmap(p, getpagesize()); \ + } else { \ + if (p != MAP_FAILED) { \ + FAILX("%s:\tsucceeded when it shouldn't have" \ + " (rights 0x%jx)", "mmap", rights); \ + (void)munmap(p, getpagesize()); \ + } else if (errno != ENOTCAPABLE) \ + SYSCALL_FAIL(syscall, "errno != ENOTCAPABLE"); \ + } \ +} while (0) + +/* + * Given a file descriptor, create a capability with specific rights and + * make sure only those rights work. +*/ +static int +try_file_ops(int fd, cap_rights_t rights) +{ + struct stat sb; + struct statfs sf; + int fd_cap, fd_capcap; + ssize_t ssize, ssize2; + off_t off; + void *p; + char ch; + int ret; + int success = PASSED; + + REQUIRE(fd_cap = cap_new(fd, rights)); + REQUIRE(fd_capcap = cap_new(fd_cap, rights)); + CHECK(fd_capcap != fd_cap); + + ssize = read(fd_cap, &ch, sizeof(ch)); + CHECK_RESULT(read, CAP_READ | CAP_SEEK, ssize >= 0); + + ssize = pread(fd_cap, &ch, sizeof(ch), 0); + ssize2 = pread(fd_cap, &ch, sizeof(ch), 0); + CHECK_RESULT(pread, CAP_READ, ssize >= 0); + CHECK(ssize == ssize2); + + ssize = write(fd_cap, &ch, sizeof(ch)); + CHECK_RESULT(write, CAP_WRITE | CAP_SEEK, ssize >= 0); + + ssize = pwrite(fd_cap, &ch, sizeof(ch), 0); + CHECK_RESULT(pwrite, CAP_WRITE, ssize >= 0); + + off = lseek(fd_cap, 0, SEEK_SET); + CHECK_RESULT(lseek, CAP_SEEK, off >= 0); + + ret = fchflags(fd_cap, UF_NODUMP); + CHECK_RESULT(fchflags, CAP_FCHFLAGS, ret == 0); + + ret = fstat(fd_cap, &sb); + CHECK_RESULT(fstat, CAP_FSTAT, ret == 0); + + p = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_READ); + + p = mmap(NULL, getpagesize(), PROT_WRITE, MAP_SHARED, fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_WRITE); + + p = mmap(NULL, getpagesize(), PROT_EXEC, MAP_SHARED, fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_MAPEXEC); + + p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, + fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_READ | CAP_WRITE); + + p = mmap(NULL, getpagesize(), PROT_READ | PROT_EXEC, MAP_SHARED, + fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_READ | CAP_MAPEXEC); + + p = mmap(NULL, getpagesize(), PROT_EXEC | PROT_WRITE, MAP_SHARED, + fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_MAPEXEC | CAP_WRITE); + + p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_SHARED, fd_cap, 0); + CHECK_MMAP_RESULT(CAP_MMAP | CAP_READ | CAP_WRITE | CAP_MAPEXEC); + + ret = fsync(fd_cap); + CHECK_RESULT(fsync, CAP_FSYNC, ret == 0); + + ret = fchown(fd_cap, -1, -1); + CHECK_RESULT(fchown, CAP_FCHOWN, ret == 0); + + ret = fchmod(fd_cap, 0644); + CHECK_RESULT(fchmod, CAP_FCHMOD, ret == 0); + + /* XXX flock */ + + ret = ftruncate(fd_cap, 0); + CHECK_RESULT(ftruncate, CAP_FTRUNCATE, ret == 0); + + ret = fstatfs(fd_cap, &sf); + CHECK_RESULT(fstatfs, CAP_FSTATFS, ret == 0); + + ret = fpathconf(fd_cap, _PC_NAME_MAX); + CHECK_RESULT(fpathconf, CAP_FPATHCONF, ret >= 0); + + ret = futimes(fd_cap, NULL); + CHECK_RESULT(futimes, CAP_FUTIMES, ret == 0); + + /* XXX select / poll / kqueue */ + + close (fd_cap); + return (success); +} + +#define TRY(fd, rights) \ +do { \ + if (success == PASSED) \ + success = try_file_ops(fd, rights); \ + else \ + /* We've already failed, but try the test anyway. */ \ + try_file_ops(fd, rights); \ +} while (0) + +int +test_capabilities(void) +{ + int fd; + int success = PASSED; + + fd = open("/tmp/cap_test", O_RDWR | O_CREAT, 0644); + if (fd < 0) + err(-1, "open"); + + if (cap_enter() < 0) + err(-1, "cap_enter"); + + /* XXX: Really want to try all combinations. */ + TRY(fd, CAP_READ); + TRY(fd, CAP_READ | CAP_SEEK); + TRY(fd, CAP_WRITE); + TRY(fd, CAP_WRITE | CAP_SEEK); + TRY(fd, CAP_READ | CAP_WRITE); + TRY(fd, CAP_READ | CAP_WRITE | CAP_SEEK); + TRY(fd, CAP_SEEK); + TRY(fd, CAP_FCHFLAGS); + TRY(fd, CAP_IOCTL); + TRY(fd, CAP_FSTAT); + TRY(fd, CAP_MMAP); + TRY(fd, CAP_MMAP | CAP_READ); + TRY(fd, CAP_MMAP | CAP_WRITE); + TRY(fd, CAP_MMAP | CAP_MAPEXEC); + TRY(fd, CAP_MMAP | CAP_READ | CAP_WRITE); + TRY(fd, CAP_MMAP | CAP_READ | CAP_MAPEXEC); + TRY(fd, CAP_MMAP | CAP_MAPEXEC | CAP_WRITE); + TRY(fd, CAP_MMAP | CAP_READ | CAP_WRITE | CAP_MAPEXEC); + TRY(fd, CAP_FCNTL); + TRY(fd, CAP_EVENT); + TRY(fd, CAP_KEVENT); + TRY(fd, CAP_FSYNC); + TRY(fd, CAP_FCHOWN); + TRY(fd, CAP_FCHMOD); + TRY(fd, CAP_FTRUNCATE); + TRY(fd, CAP_FLOCK); + TRY(fd, CAP_FSTATFS); + TRY(fd, CAP_FPATHCONF); + TRY(fd, CAP_FUTIMES); + TRY(fd, CAP_ACL_GET); + TRY(fd, CAP_ACL_SET); + TRY(fd, CAP_ACL_DELETE); + TRY(fd, CAP_ACL_CHECK); + TRY(fd, CAP_EXTATTR_GET); + TRY(fd, CAP_EXTATTR_SET); + TRY(fd, CAP_EXTATTR_DELETE); + TRY(fd, CAP_EXTATTR_LIST); + TRY(fd, CAP_MAC_GET); + TRY(fd, CAP_MAC_SET); + + /* + * Socket-specific. + */ + TRY(fd, CAP_GETPEERNAME); + TRY(fd, CAP_GETSOCKNAME); + TRY(fd, CAP_ACCEPT); + + return (success); +} diff --git a/tools/regression/security/cap_test/cap_test_fcntl.c b/tools/regression/security/cap_test/cap_test_fcntl.c new file mode 100644 index 0000000..1d12ebd --- /dev/null +++ b/tools/regression/security/cap_test/cap_test_fcntl.c @@ -0,0 +1,117 @@ +/*- + * Copyright (c) 2009-2011 Robert N. M. Watson + * Copyright (c) 2011 Jonathan Anderson + * 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. + * + * 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. + */ + +/* + * Test that fcntl works in capability mode. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/capability.h> +#include <sys/errno.h> +#include <sys/ipc.h> +#include <sys/mman.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <sys/sysctl.h> +#include <sys/wait.h> + +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "cap_test.h" + +/* A filename->descriptor mapping. */ +struct fd { + char *f_name; + int f_fd; +}; + +/* + * Ensure that fcntl() works consistently for both regular file descriptors and + * capability-wrapped ones. + */ +int +test_fcntl(void) +{ + int success = PASSED; + cap_rights_t rights = CAP_READ | CAP_FCNTL; + + /* + * Open some files of different types, and wrap them in capabilities. + */ + struct fd files[] = { + { "file", open("/etc/passwd", O_RDONLY) }, + { "socket", socket(PF_LOCAL, SOCK_STREAM, 0) }, + { "SHM", shm_open(SHM_ANON, O_RDWR, 0600) }, + }; + REQUIRE(files[0].f_fd); + REQUIRE(files[1].f_fd); + REQUIRE(files[2].f_fd); + + struct fd caps[] = { + { "file cap", cap_new(files[0].f_fd, rights) }, + { "socket cap", cap_new(files[1].f_fd, rights) }, + { "SHM cap", cap_new(files[2].f_fd, rights) }, + }; + REQUIRE(caps[0].f_fd); + REQUIRE(caps[1].f_fd); + REQUIRE(caps[2].f_fd); + + struct fd all[] = { + files[0], caps[0], + files[1], caps[1], + files[2], caps[2], + }; + const size_t len = sizeof(all) / sizeof(struct fd); + + REQUIRE(cap_enter()); + + /* + * Ensure that we can fcntl() all the files that we opened above. + */ + for (size_t i = 0; i < len; i++) + { + struct fd f = all[i]; + int cap; + + CHECK_SYSCALL_SUCCEEDS(fcntl, f.f_fd, F_GETFL, 0); + REQUIRE(cap = cap_new(f.f_fd, CAP_READ)); + if (fcntl(f.f_fd, F_GETFL, 0) == -1) + FAIL("Error calling fcntl('%s', F_GETFL)", f.f_name); + else + CHECK_NOTCAPABLE(fcntl, cap, F_GETFL, 0); + } + + return (success); +} + |