Re: [PATCH v8 2/8] powerpc/ima: add support to initialize ima policy rules
From: Mimi Zohar <zohar@linux.ibm.com>
Date: 2019-10-20 00:17:13
Also in:
linux-efi, linux-integrity, lkml
On Sat, 2019-10-19 at 14:06 -0400, Nayna Jain wrote:
quoted hunk ↗ jump to hunk
index 000000000000..65d82ee74ea4--- /dev/null +++ b/arch/powerpc/kernel/ima_arch.c@@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 IBM Corporation + * Author: Nayna Jain + */ + +#include <linux/ima.h> +#include <asm/secure_boot.h> + +bool arch_ima_get_secureboot(void) +{ + return is_ppc_secureboot_enabled(); +} + +/* + * The "secure_rules" are enabled only on "secureboot" enabled systems. + * These rules verify the file signatures against known good values. + * The "appraise_type=imasig|modsig" option allows the known good signature + * to be stored as an xattr or as an appended signature.
Please add another sentence or two as a separate paragraph with an explanation why the kernel module rule is conditional (eg. Only verify the appended kernel module signatures once.)
+ */
+static const char *const secure_rules[] = {
+ "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig",
+#ifndef CONFIG_MODULE_SIG_FORCE
+ "appraise func=MODULE_CHECK appraise_type=imasig|modsig",
+#endif
+ NULL
+};
+Mimi