svn commit: r224653 - head/tools/regression/security/cap_test
Jonathan Anderson
jonathan at FreeBSD.org
Thu Aug 4 17:17:58 UTC 2011
Author: jonathan
Date: Thu Aug 4 17:17:57 2011
New Revision: 224653
URL: http://svn.freebsd.org/changeset/base/224653
Log:
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
Added:
head/tools/regression/security/cap_test/cap_test.t (contents, props changed)
head/tools/regression/security/cap_test/cap_test_capabilities.c (contents, props changed)
head/tools/regression/security/cap_test/cap_test_fcntl.c (contents, props changed)
Added: head/tools/regression/security/cap_test/cap_test.t
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/regression/security/cap_test/cap_test.t Thu Aug 4 17:17:57 2011 (r224653)
@@ -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 $*
+
Added: head/tools/regression/security/cap_test/cap_test_capabilities.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/regression/security/cap_test/cap_test_capabilities.c Thu Aug 4 17:17:57 2011 (r224653)
@@ -0,0 +1,260 @@
+/*-
+ * Copyright (c) 2009-2011 Robert N. M. Watson
+ * Copyright (c) 2011 Jonathan Anderson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Test whether various operations on capabilities are properly masked for
+ * various object types.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$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);
+}
Added: head/tools/regression/security/cap_test/cap_test_fcntl.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/regression/security/cap_test/cap_test_fcntl.c Thu Aug 4 17:17:57 2011 (r224653)
@@ -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);
+}
+
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