1 files changed, 49 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_mok.c b/security/integrity/ima/ima_mok.c
new file mode 100644
index 000000000..95cc31525
--- /dev/null
+++ b/security/integrity/ima/ima_mok.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Juniper Networks, Inc.
+ *
+ * Author:
+ * Petko Manolov <petko.manolov@konsulko.com>
+ */
+
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/cred.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <keys/system_keyring.h>
+
+
+struct key *ima_blacklist_keyring;
+
+/*
+ * Allocate the IMA blacklist keyring
+ */
+static __init int ima_mok_init(void)
+{
+	struct key_restriction *restriction;
+
+	pr_notice("Allocating IMA blacklist keyring.\n");
+
+	restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
+	if (!restriction)
+		panic("Can't allocate IMA blacklist restriction.");
+
+	restriction->check = restrict_link_by_builtin_trusted;
+
+	ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
+				KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
+				(KEY_POS_ALL & ~KEY_POS_SETATTR) |
+				KEY_USR_VIEW | KEY_USR_READ |
+				KEY_USR_WRITE | KEY_USR_SEARCH,
+				KEY_ALLOC_NOT_IN_QUOTA |
+				KEY_ALLOC_SET_KEEP,
+				restriction, NULL);
+
+	if (IS_ERR(ima_blacklist_keyring))
+		panic("Can't allocate IMA blacklist keyring.");
+	return 0;
+}
+device_initcall(ima_mok_init);