[PATCH] integrity: audit update

Mimi Zohar
2009-02-09T23:24:20Z

- Force audit result to be either 0 or 1.
- make template names const
- Add new stand-alone message type: AUDIT_INTEGRITY_RULE

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
---
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 930939a..4fa2810 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -36,7 +36,8 @@
* 1500 - 1599 kernel LSPP events
* 1600 - 1699 kernel crypto events
* 1700 - 1799 kernel anomaly records
- * 1800 - 1999 future kernel use (maybe integrity labels and related events)
+ * 1800 - 1899 kernel integrity events
+ * 1900 - 1999 future kernel use
* 2000 is for otherwise unclassified kernel audit messages (legacy)
* 2001 - 2099 unused (kernel)
* 2100 - 2199 user space anomaly records
@@ -130,6 +131,7 @@
#define AUDIT_INTEGRITY_STATUS 1802 /* Integrity enable status */
#define AUDIT_INTEGRITY_HASH 1803 /* Integrity HASH type */
#define AUDIT_INTEGRITY_PCR 1804 /* PCR invalidation msgs */
+#define AUDIT_INTEGRITY_RULE 1805 /* policy rule */

#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */

diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index e3c16a2..165eb53 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -47,7 +47,7 @@ struct ima_template_data {

struct ima_template_entry {
u8 digest[IMA_DIGEST_SIZE]; /* sha1 or md5 measurement hash */
- char *template_name;
+ const char *template_name;
int template_len;
struct ima_template_data template;
};
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index a148a25..3cd58b6 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -15,7 +15,7 @@
#include <linux/module.h>

#include "ima.h"
-static char *IMA_TEMPLATE_NAME = "ima";
+static const char *IMA_TEMPLATE_NAME = "ima";

/*
* ima_store_template - store ima template measurements
diff --git a/security/integrity/ima/ima_audit.c b/security/integrity/ima/ima_audit.c
index 8a0f1e2..1e082bb 100644
--- a/security/integrity/ima/ima_audit.c
+++ b/security/integrity/ima/ima_audit.c
@@ -22,16 +22,18 @@ static int ima_audit;
static int __init ima_audit_setup(char *str)
{
unsigned long audit;
- int rc;
- char *op;
+ int rc, result = 0;
+ char *op = "ima_audit";
+ char *cause;

rc = strict_strtoul(str, 0, &audit);
if (rc || audit > 1)
- printk(KERN_INFO "ima: invalid ima_audit value\n");
+ result = 1;
else
ima_audit = audit;
- op = ima_audit ? "ima_audit_enabled" : "ima_audit_not_enabled";
- integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL, NULL, op, 0, 0);
+ 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);
@@ -47,20 +49,21 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
return;

ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
- audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u",
+ audit_log_format(ab, "integrity: pid=%d uid=%u auid=%u ses=%u",
current->pid, current->cred->uid,
- audit_get_loginuid(current));
+ 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;
- case AUDIT_INTEGRITY_STATUS:
default:
audit_log_format(ab, " op=%s", op);
}
@@ -73,6 +76,6 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
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);
+ audit_log_format(ab, " res=%d", !result ? 0 : 1);
audit_log_end(ab);
}
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 573780c..ffbe259 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -137,7 +137,7 @@ static int ima_measurements_show(struct seq_file *m, void *v)
ima_putc(m, &namelen, sizeof namelen);

/* 4th: template name */
- ima_putc(m, e->template_name, namelen);
+ ima_putc(m, (void *)e->template_name, namelen);

/* 5th: template specific data */
ima_template_show(m, (struct ima_template_data *)&e->template,
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index cf227db..0b0bb8c 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -20,7 +20,7 @@
#include "ima.h"

/* name for boot aggregate entry */
-static char *boot_aggregate_name = "boot_aggregate";
+static const char *boot_aggregate_name = "boot_aggregate";
int ima_used_chip;

/* Add the boot aggregate to the IMA measurement list and extend
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 23810e0..b5291ad 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -12,7 +12,6 @@
*/
#include <linux/module.h>
#include <linux/list.h>
-#include <linux/audit.h>
#include <linux/security.h>
#include <linux/magic.h>
#include <linux/parser.h>
@@ -239,8 +238,7 @@ static int ima_parse_rule(char *rule, struct ima_measure_rule_entry *entry)
char *p;
int result = 0;

- ab = audit_log_start(current->audit_context, GFP_KERNEL,
- AUDIT_INTEGRITY_STATUS);
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_INTEGRITY_RULE);

entry->action = -1;
while ((p = strsep(&rule, " \n")) != NULL) {
@@ -345,15 +343,14 @@ static int ima_parse_rule(char *rule, struct ima_measure_rule_entry *entry)
AUDIT_SUBJ_TYPE);
break;
case Opt_err:
- printk(KERN_INFO "%s: unknown token: %s\n",
- __FUNCTION__, p);
+ audit_log_format(ab, "UNKNOWN=%s ", p);
break;
}
}
if (entry->action == UNKNOWN)
result = -EINVAL;

- audit_log_format(ab, "res=%d", result);
+ audit_log_format(ab, "res=%d", !result ? 0 : 1);
audit_log_end(ab);
return result;
}
@@ -367,7 +364,7 @@ static int ima_parse_rule(char *rule, struct ima_measure_rule_entry *entry)
*/
int ima_parse_add_rule(char *rule)
{
- const char *op = "add_rule";
+ const char *op = "update_policy";
struct ima_measure_rule_entry *entry;
int result = 0;
int audit_info = 0;
@@ -394,8 +391,12 @@ int ima_parse_add_rule(char *rule)
mutex_lock(&ima_measure_mutex);
list_add_tail(&entry->list, &measure_policy_rules);
mutex_unlock(&ima_measure_mutex);
- } else
+ } else {
kfree(entry);
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL,
+ NULL, op, "invalid policy", result,
+ audit_info);
+ }
return result;
}

--
1.5.6.6