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-rw-r--r--Makefile.am1
-rw-r--r--configure.ac14
-rw-r--r--src/build.h8
-rw-r--r--src/ima-setup.c115
-rw-r--r--src/ima-setup.h29
-rw-r--r--src/main.c6
6 files changed, 171 insertions, 2 deletions
diff --git a/Makefile.am b/Makefile.am
index d8155fdac..6d0b51a09 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -510,6 +510,7 @@ libsystemd_core_la_SOURCES = \
src/mount-setup.c \
src/hostname-setup.c \
src/selinux-setup.c \
+ src/ima-setup.c \
src/loopback-setup.c \
src/kmod-setup.c \
src/locale-setup.c \
diff --git a/configure.ac b/configure.ac
index fa17e8be2..47a08dda6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,6 +127,19 @@ PKG_CHECK_MODULES(UDEV, [ libudev >= 172 ])
PKG_CHECK_MODULES(DBUS, [ dbus-1 >= 1.3.2 ])
PKG_CHECK_MODULES(KMOD, [ libkmod >= 5 ])
+have_ima=yes
+AC_ARG_ENABLE([ima], AS_HELP_STRING([--disable-ima],[Disable optional IMA support]),
+ [case "${enableval}" in
+ yes) have_ima=yes ;;
+ no) have_ima=no ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --disable-ima) ;;
+ esac],
+ [have_ima=yes])
+
+if test "x${have_ima}" != xno ; then
+ AC_DEFINE(HAVE_IMA, 1, [Define if IMA is available])
+fi
+
have_selinux=no
AC_ARG_ENABLE(selinux, AS_HELP_STRING([--disable-selinux], [Disable optional SELINUX support]))
if test "x$enable_selinux" != "xno"; then
@@ -609,6 +622,7 @@ AC_MSG_RESULT([
tcpwrap: ${have_tcpwrap}
PAM: ${have_pam}
AUDIT: ${have_audit}
+ IMA: ${have_ima}
SELinux: ${have_selinux}
XZ: ${have_xz}
ACL: ${have_acl}
diff --git a/src/build.h b/src/build.h
index 50cd79dc7..061901314 100644
--- a/src/build.h
+++ b/src/build.h
@@ -46,6 +46,12 @@
#define _SELINUX_FEATURE_ "-SELINUX"
#endif
+#ifdef HAVE_IMA
+#define _IMA_FEATURE_ "+IMA"
+#else
+#define _IMA_FEATURE_ "-IMA"
+#endif
+
#ifdef HAVE_SYSV_COMPAT
#define _SYSVINIT_FEATURE_ "+SYSVINIT"
#else
@@ -58,6 +64,6 @@
#define _LIBCRYPTSETUP_FEATURE_ "-LIBCRYPTSETUP"
#endif
-#define SYSTEMD_FEATURES _PAM_FEATURE_ " " _LIBWRAP_FEATURE_ " " _AUDIT_FEATURE_ " " _SELINUX_FEATURE_ " " _SYSVINIT_FEATURE_ " " _LIBCRYPTSETUP_FEATURE_
+#define SYSTEMD_FEATURES _PAM_FEATURE_ " " _LIBWRAP_FEATURE_ " " _AUDIT_FEATURE_ " " _SELINUX_FEATURE_ " " _IMA_FEATURE_ " " _SYSVINIT_FEATURE_ " " _LIBCRYPTSETUP_FEATURE_
#endif
diff --git a/src/ima-setup.c b/src/ima-setup.c
new file mode 100644
index 000000000..03e43dcf1
--- /dev/null
+++ b/src/ima-setup.c
@@ -0,0 +1,115 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright (C) 2012 Roberto Sassu - Politecnico di Torino, Italy
+ TORSEC group -- http://security.polito.it
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "ima-setup.h"
+#include "mount-setup.h"
+#include "macro.h"
+#include "util.h"
+#include "log.h"
+#include "label.h"
+
+#define IMA_SECFS_DIR "/sys/kernel/security/ima"
+#define IMA_SECFS_POLICY IMA_SECFS_DIR "/policy"
+#define IMA_POLICY_PATH "/etc/ima/ima-policy"
+
+int ima_setup(void) {
+
+#ifdef HAVE_IMA
+ struct stat st;
+ ssize_t policy_size = 0, written = 0;
+ char *policy;
+ int policyfd = -1, imafd = -1;
+ int result = 0;
+
+#ifndef HAVE_SELINUX
+ /* Mount the securityfs filesystem */
+ mount_setup_early();
+#endif
+
+ if (stat(IMA_POLICY_PATH, &st) < 0)
+ return 0;
+
+ policy_size = st.st_size;
+ if (stat(IMA_SECFS_DIR, &st) < 0) {
+ log_debug("IMA support is disabled in the kernel, ignoring.");
+ return 0;
+ }
+
+ if (stat(IMA_SECFS_POLICY, &st) < 0) {
+ log_error("Another IMA custom policy has already been loaded, "
+ "ignoring.");
+ return 0;
+ }
+
+ policyfd = open(IMA_POLICY_PATH, O_RDONLY|O_CLOEXEC);
+ if (policyfd < 0) {
+ log_error("Failed to open the IMA custom policy file %s (%m), "
+ "ignoring.", IMA_POLICY_PATH);
+ return 0;
+ }
+
+ imafd = open(IMA_SECFS_POLICY, O_WRONLY|O_CLOEXEC);
+ if (imafd < 0) {
+ log_error("Failed to open the IMA kernel interface %s (%m), "
+ "ignoring.", IMA_SECFS_POLICY);
+ goto out;
+ }
+
+ policy = mmap(NULL, policy_size, PROT_READ, MAP_PRIVATE, policyfd, 0);
+ if (policy == MAP_FAILED) {
+ log_error("mmap() failed (%m), freezing");
+ result = -errno;
+ goto out;
+ }
+
+ written = loop_write(imafd, policy, (size_t)policy_size, false);
+ if (written != policy_size) {
+ log_error("Failed to load the IMA custom policy file %s (%m), "
+ "ignoring.", IMA_POLICY_PATH);
+ goto out_mmap;
+ }
+
+ log_info("Successfully loaded the IMA custom policy %s.",
+ IMA_POLICY_PATH);
+out_mmap:
+ munmap(policy, policy_size);
+out:
+ if (policyfd >= 0)
+ close_nointr_nofail(policyfd);
+ if (imafd >= 0)
+ close_nointr_nofail(imafd);
+ if (result)
+ return result;
+#endif /* HAVE_IMA */
+
+ return 0;
+}
diff --git a/src/ima-setup.h b/src/ima-setup.h
new file mode 100644
index 000000000..7d677cf85
--- /dev/null
+++ b/src/ima-setup.h
@@ -0,0 +1,29 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooimasetuphfoo
+#define fooimasetuphfoo
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright (C) 2012 Roberto Sassu - Politecnico di Torino, Italy
+ TORSEC group -- http://security.polito.it
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+int ima_setup(void);
+
+#endif
diff --git a/src/main.c b/src/main.c
index ed317b441..7ae88414a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -41,6 +41,7 @@
#include "kmod-setup.h"
#include "locale-setup.h"
#include "selinux-setup.h"
+#include "ima-setup.h"
#include "machine-id-setup.h"
#include "load-fragment.h"
#include "fdset.h"
@@ -1203,9 +1204,12 @@ int main(int argc, char *argv[]) {
arg_running_as = MANAGER_SYSTEM;
log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
- if (!is_reexec)
+ if (!is_reexec) {
if (selinux_setup(&loaded_policy) < 0)
goto finish;
+ if (ima_setup() < 0)
+ goto finish;
+ }
log_open();
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 16:35:03 +0000