checkpath: restore the SELinux context
X-Gentoo-Bug: 516956 X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=516956
This commit is contained in:
Jason Zaman
William Hubbs
parent
525d7140b1
commit
9c689542c3
@ -4,7 +4,11 @@ SRCS= checkpath.c fstabinfo.c mountinfo.c start-stop-daemon.c \
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rc-misc.c rc-plugin.c rc-service.c rc-status.c rc-update.c \
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runscript.c rc.c swclock.c
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CLEANFILES= version.h
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ifeq (${MKSELINUX},yes)
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SRCS+= rc-selinux-util.c
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endif
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CLEANFILES= version.h rc-selinux-util.o
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BINDIR= ${PREFIX}/bin
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SBINDIR= ${PREFIX}/sbin
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@ -46,6 +46,10 @@
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#include "einfo.h"
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#include "rc-misc.h"
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#ifdef HAVE_SELINUX
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#include "rc-selinux-util.h"
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#endif
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typedef enum {
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inode_unknown = 0,
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inode_file = 1,
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@ -55,13 +59,9 @@ typedef enum {
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extern const char *applet;
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/* TODO: SELinux
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* This needs a LOT of SELinux loving
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* See systemd's src/label.c:label_mkdir
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*/
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static int
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do_check(char *path, uid_t uid, gid_t gid, mode_t mode, inode_t type,
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bool trunc, bool chowner)
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bool trunc, bool chowner, bool selinux_on)
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{
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struct stat st;
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int fd, flags;
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@ -149,6 +149,11 @@ do_check(char *path, uid_t uid, gid_t gid, mode_t mode, inode_t type,
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}
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}
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#ifdef HAVE_SELINUX
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if (selinux_on)
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selinux_util_label(path);
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#endif
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return 0;
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}
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@ -226,6 +231,7 @@ checkpath(int argc, char **argv)
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bool trunc = false;
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bool chowner = false;
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bool writable = false;
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bool selinux_on = false;
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while ((opt = getopt_long(argc, argv, getoptstring,
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longopts, (int *) 0)) != -1)
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@ -276,13 +282,23 @@ checkpath(int argc, char **argv)
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if (gr)
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gid = gr->gr_gid;
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#ifdef HAVE_SELINUX
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if (1 == selinux_util_open())
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selinux_on = true;
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#endif
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while (optind < argc) {
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if (writable)
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exit(!is_writable(argv[optind]));
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if (do_check(argv[optind], uid, gid, mode, type, trunc, chowner))
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if (do_check(argv[optind], uid, gid, mode, type, trunc, chowner, selinux_on))
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retval = EXIT_FAILURE;
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optind++;
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}
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#ifdef HAVE_SELINUX
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if (selinux_on)
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selinux_util_close();
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#endif
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return retval;
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}
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126
src/rc/rc-selinux-util.c
Normal file
126
src/rc/rc-selinux-util.c
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@ -0,0 +1,126 @@
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/*
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rc-selinux.c
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SELinux helpers to get and set contexts.
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*/
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/*
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* Copyright (c) 2014 Jason Zaman <jason@perfinion.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stddef.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <selinux/selinux.h>
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#include <selinux/label.h>
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#include "rc-selinux-util.h"
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static struct selabel_handle *hnd = NULL;
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int
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selinux_util_label(const char *path)
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{
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int retval = 0;
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int enforce;
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struct stat st;
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security_context_t con;
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enforce = security_getenforce();
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if (retval < 0)
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return retval;
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if (NULL == hnd)
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return (enforce) ? -1 : 0;
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retval = lstat(path, &st);
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if (retval < 0) {
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if (ENOENT == errno)
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return 0;
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return (enforce) ? -1 : 0;
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}
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/* lookup the context */
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retval = selabel_lookup_raw(hnd, &con, path, st.st_mode);
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if (retval < 0) {
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if (ENOENT == errno)
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return 0;
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return (enforce) ? -1 : 0;
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}
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/* apply the context */
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retval = lsetfilecon(path, con);
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freecon(con);
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if (retval < 0) {
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if (ENOENT == errno)
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return 0;
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if (ENOTSUP == errno)
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return 0;
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return (enforce) ? -1 : 0;
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}
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return 0;
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}
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/*
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* Open the label handle
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* returns 1 on success, 0 if no selinux, negative on error
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*/
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int
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selinux_util_open(void)
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{
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int retval = 0;
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retval = is_selinux_enabled();
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if (retval <= 0)
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return retval;
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hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
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if (NULL == hnd)
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return -2;
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return 1;
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}
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/*
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* Close the label handle
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* returns 1 on success, 0 if no selinux, negative on error
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*/
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int
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selinux_util_close(void)
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{
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int retval = 0;
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retval = is_selinux_enabled();
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if (retval <= 0)
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return retval;
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if (hnd) {
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selabel_close(hnd);
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hnd = NULL;
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}
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return 0;
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}
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33
src/rc/rc-selinux-util.h
Normal file
33
src/rc/rc-selinux-util.h
Normal file
@ -0,0 +1,33 @@
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/*
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* Copyright (c) 2014 Jason Zaman <jason@perfinion.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef RC_SELINUX_UTIL_H
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#define RC_SELINUX_UTIL_H
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int selinux_util_open(void);
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int selinux_util_label(const char *path);
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int selinux_util_close(void);
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#endif
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