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Diffstat (limited to 'security/integrity/ima/ima_audit.c')
-rw-r--r--security/integrity/ima/ima_audit.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_audit.c b/security/integrity/ima/ima_audit.c
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index 000000000000..1e082bb987be
--- /dev/null
+++ b/security/integrity/ima/ima_audit.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2008 IBM Corporation
+ * Author: Mimi Zohar <zohar@us.ibm.com>
+ *
+ * This program 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, version 2 of the License.
+ *
+ * File: integrity_audit.c
+ * Audit calls for the integrity subsystem
+ */
+
+#include <linux/fs.h>
+#include <linux/audit.h>
+#include "ima.h"
+
+static int ima_audit;
+
+#ifdef CONFIG_IMA_AUDIT
+
+/* ima_audit_setup - enable informational auditing messages */
+static int __init ima_audit_setup(char *str)
+{
+ unsigned long audit;
+ int rc, result = 0;
+ char *op = "ima_audit";
+ char *cause;
+
+ rc = strict_strtoul(str, 0, &audit);
+ if (rc || audit > 1)
+ result = 1;
+ else
+ ima_audit = audit;
+ cause = ima_audit ? "enabled" : "not_enabled";
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL,
+ op, cause, result, 0);
+ return 1;
+}
+__setup("ima_audit=", ima_audit_setup);
+#endif
+
+void integrity_audit_msg(int audit_msgno, struct inode *inode,
+ const unsigned char *fname, const char *op,
+ const char *cause, int result, int audit_info)
+{
+ struct audit_buffer *ab;
+
+ if (!ima_audit && audit_info == 1) /* Skip informational messages */
+ return;
+
+ ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
+ audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u ses=%u",
+ current->pid, current->cred->uid,
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
+ audit_log_task_context(ab);
+ switch (audit_msgno) {
+ case AUDIT_INTEGRITY_DATA:
+ case AUDIT_INTEGRITY_METADATA:
+ case AUDIT_INTEGRITY_PCR:
+ case AUDIT_INTEGRITY_STATUS:
+ audit_log_format(ab, " op=%s cause=%s", op, cause);
+ break;
+ case AUDIT_INTEGRITY_HASH:
+ audit_log_format(ab, " op=%s hash=%s", op, cause);
+ break;
+ default:
+ audit_log_format(ab, " op=%s", op);
+ }
+ audit_log_format(ab, " comm=");
+ audit_log_untrustedstring(ab, current->comm);
+ if (fname) {
+ audit_log_format(ab, " name=");
+ audit_log_untrustedstring(ab, fname);
+ }
+ if (inode)
+ audit_log_format(ab, " dev=%s ino=%lu",
+ inode->i_sb->s_id, inode->i_ino);
+ audit_log_format(ab, " res=%d", !result ? 0 : 1);
+ audit_log_end(ab);
+}