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-rw-r--r--src/libcore/ima-setup.c80
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diff --git a/src/libcore/ima-setup.c b/src/libcore/ima-setup.c
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+++ b/src/libcore/ima-setup.c
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+/***
+ 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 Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "fd-util.h"
+#include "fileio.h"
+#include "ima-setup.h"
+#include "log.h"
+#include "util.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
+ _cleanup_fclose_ FILE *input = NULL;
+ _cleanup_close_ int imafd = -1;
+ unsigned lineno = 0;
+ char line[page_size()];
+
+ if (access(IMA_SECFS_DIR, F_OK) < 0) {
+ log_debug("IMA support is disabled in the kernel, ignoring.");
+ return 0;
+ }
+
+ input = fopen(IMA_POLICY_PATH, "re");
+ if (!input) {
+ log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno,
+ "Failed to open the IMA custom policy file "IMA_POLICY_PATH", ignoring: %m");
+ return 0;
+ }
+
+ if (access(IMA_SECFS_POLICY, F_OK) < 0) {
+ log_warning("Another IMA custom policy has already been loaded, ignoring.");
+ return 0;
+ }
+
+ imafd = open(IMA_SECFS_POLICY, O_WRONLY|O_CLOEXEC);
+ if (imafd < 0) {
+ log_error_errno(errno, "Failed to open the IMA kernel interface "IMA_SECFS_POLICY", ignoring: %m");
+ return 0;
+ }
+
+ FOREACH_LINE(line, input,
+ return log_error_errno(errno, "Failed to read the IMA custom policy file "IMA_POLICY_PATH": %m")) {
+ size_t len;
+
+ len = strlen(line);
+ lineno++;
+
+ if (len > 0 && write(imafd, line, len) < 0)
+ return log_error_errno(errno, "Failed to load the IMA custom policy file "IMA_POLICY_PATH"%u: %m",
+ lineno);
+ }
+
+ log_info("Successfully loaded the IMA custom policy "IMA_POLICY_PATH".");
+#endif /* HAVE_IMA */
+ return 0;
+}