diff options
Diffstat (limited to 'tools/regression/priv/priv_msgbuf.c')
| -rw-r--r-- | tools/regression/priv/priv_msgbuf.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/tools/regression/priv/priv_msgbuf.c b/tools/regression/priv/priv_msgbuf.c new file mode 100644 index 000000000000..17bf1a09c6f4 --- /dev/null +++ b/tools/regression/priv/priv_msgbuf.c @@ -0,0 +1,150 @@ +/*- + * Copyright (c) 2007 Robert M. M. Watson + * All rights reserved. + * + * This software was developed by Robert N. M. Watson for the TrustedBSD + * Project. + * + * 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. + */ + +/* + * Confirm that when security.bsd.unprivileged_read_msgbuf is set to 0, + * privilege is required to read the kernel message buffer. + */ + +#include <sys/types.h> +#include <sys/sysctl.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> + +#include "main.h" + +#define MSGBUF_CONTROL_NAME "security.bsd.unprivileged_read_msgbuf" +#define MSGBUF_NAME "kern.msgbuf" + +/* + * We must query and save the original value, then restore it when done. + */ +static int unprivileged_read_msgbuf; +static int unprivileged_read_msgbuf_initialized; + +int +priv_msgbuf_privonly_setup(int asroot, int injail, struct test *test) +{ + size_t len; + int newval; + + /* + * Separately query and set to make debugging easier. + */ + len = sizeof(unprivileged_read_msgbuf); + if (sysctlbyname(MSGBUF_CONTROL_NAME, &unprivileged_read_msgbuf, + &len, NULL, 0) < 0) { + warn("priv_msgbuf_privonly_setup: sysctlbyname query"); + return (-1); + } + newval = 0; + if (sysctlbyname(MSGBUF_CONTROL_NAME, NULL, NULL, &newval, + sizeof(newval)) < 0) { + warn("priv_msgbuf_privonly_setup: sysctlbyname set"); + return (-1); + } + unprivileged_read_msgbuf_initialized = 1; + return (0); +} + +void +priv_msgbuf_privonly(int asroot, int injail, struct test *test) +{ + size_t len; + int error; + + error = sysctlbyname(MSGBUF_NAME, NULL, &len, NULL, 0); + if (asroot && injail) + expect("priv_msgbuf_privonly(asroot, injail)", error, -1, + EPERM); + if (asroot && !injail) + expect("priv_msgbuf_privonly(asroot, !injail)", error, 0, 0); + if (!asroot && injail) + expect("priv_msgbuf_privonly(!asroot, injail)", error, -1, + EPERM); + if (!asroot && !injail) + expect("priv_msgbuf_privonly(!asroot, !injail)", error, -1, + EPERM); +} + +int +priv_msgbuf_unprivok_setup(int asroot, int injail, struct test *test) +{ + size_t len; + int newval; + + /* + * Separately query and set to make debugging easier. + */ + len = sizeof(unprivileged_read_msgbuf); + if (sysctlbyname(MSGBUF_CONTROL_NAME, &unprivileged_read_msgbuf, &len, + NULL, 0) < 0) { + warn("priv_msgbuf_unprivok_setup: sysctlbyname query"); + return (-1); + } + newval = 1; + if (sysctlbyname(MSGBUF_CONTROL_NAME, NULL, NULL, &newval, + sizeof(newval)) < 0) { + warn("priv_msgbuf_unprivok_setup: sysctlbyname set"); + return (-1); + } + unprivileged_read_msgbuf_initialized = 1; + return (0); +} + +void +priv_msgbuf_unprivok(int asroot, int injail, struct test *test) +{ + size_t len; + int error; + + error = sysctlbyname(MSGBUF_NAME, NULL, &len, NULL, 0); + if (asroot && injail) + expect("priv_msgbuf_unprivok(asroot, injail)", error, 0, 0); + if (asroot && !injail) + expect("priv_msgbuf_unprivok(asroot, !injail)", error, 0, 0); + if (!asroot && injail) + expect("priv_msgbuf_unprivok(!asroot, injail)", error, 0, 0); + if (!asroot && !injail) + expect("priv_msgbuf_unprivok(!asroot, !injail)", error, 0, 0); +} + +void +priv_msgbuf_cleanup(int asroot, int injail, struct test *test) +{ + + if (unprivileged_read_msgbuf_initialized) { + (void)sysctlbyname(MSGBUF_NAME, NULL, NULL, + &unprivileged_read_msgbuf, + sizeof(unprivileged_read_msgbuf)); + unprivileged_read_msgbuf_initialized = 0; + } +} |