From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, linux-pm@vger.kernel.org,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Matthew Garrett <matthew.garrett@nebula.com>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Josh Boyer <jwboyer@redhat.com>, Vojtech Pavlik <vojtech@suse.cz>,
Matt Fleming <matt.fleming@intel.com>,
Jiri Kosina <jkosina@suse.cz>, "H. Peter Anvin" <hpa@zytor.com>,
Ingo Molnar <mingo@redhat.com>, "Lee, Chun-Yi" <jlee@suse.com>
Subject: [PATCH v2 01/16] PM / hibernate: define HMAC algorithm and digest size of hibernation
Date: Tue, 11 Aug 2015 14:16:21 +0800 [thread overview]
Message-ID: <1439273796-25359-2-git-send-email-jlee@suse.com> (raw)
In-Reply-To: <1439273796-25359-1-git-send-email-jlee@suse.com>
Using HMAC-SHA1 to be the HMAC algorithm of signing hibernate
snapshot image. The digest size of HMAC-SHA1 is 160 bits (20 bytes),
this size will be also applied to the length of HMAC key.
In addition, moved swsusp_info struct definition into CONFIG_HIBERNATION
ifdef block because only hibernate code uses it.
Add HIBERNATE_VERIFICATION kernel config for using by later hibernate
signature verification code.
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
---
include/linux/suspend.h | 5 +++++
kernel/power/Kconfig | 13 +++++++++++++
kernel/power/power.h | 3 ++-
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 5efe743..56c6de9 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -327,6 +327,11 @@ struct platform_hibernation_ops {
};
#ifdef CONFIG_HIBERNATION
+
+/* HMAC Algorithm of Hibernate Signature */
+#define HIBERNATION_HMAC "hmac(sha1)"
+#define HIBERNATION_DIGEST_SIZE 20
+
/* kernel/power/snapshot.c */
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
static inline void __init register_nosave_region(unsigned long b, unsigned long e)
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 9e30231..8608b3b 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -66,6 +66,19 @@ config HIBERNATION
For more information take a look at <file:Documentation/power/swsusp.txt>.
+config HIBERNATE_VERIFICATION
+ bool "Hibernate verification"
+ depends on HIBERNATION
+ depends on EFI_STUB
+ depends on X86
+ select CRYPTO_HMAC
+ select CRYPTO_SHA1
+ help
+ This option provides support for generating and verifying the
+ signature of memory snapshot image by HMAC-SHA1. Current mechanism
+ relies on UEFI secure boot environment, EFI stub generates HMAC
+ key for hibernate verification.
+
config ARCH_SAVE_PAGE_KEYS
bool
diff --git a/kernel/power/power.h b/kernel/power/power.h
index caadb56..6ea5c78 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -4,6 +4,7 @@
#include <linux/freezer.h>
#include <linux/compiler.h>
+#ifdef CONFIG_HIBERNATION
struct swsusp_info {
struct new_utsname uts;
u32 version_code;
@@ -12,9 +13,9 @@ struct swsusp_info {
unsigned long image_pages;
unsigned long pages;
unsigned long size;
+ u8 signature[HIBERNATION_DIGEST_SIZE];
} __aligned(PAGE_SIZE);
-#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __init hibernate_reserved_size_init(void);
extern void __init hibernate_image_size_init(void);
--
2.1.4
next prev parent reply other threads:[~2015-08-11 6:17 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-11 6:16 [PATCH v2 00/16] Signature verification of hibernate snapshot Lee, Chun-Yi
2015-08-11 6:16 ` Lee, Chun-Yi [this message]
2015-08-11 6:16 ` [PATCH v2 02/16] x86/efi: Add get and set variable to EFI services pointer table Lee, Chun-Yi
2015-08-19 16:35 ` Matt Fleming
2015-08-11 6:16 ` [PATCH v2 03/16] x86/boot: Public getting random boot function Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 04/16] x86/efi: Generating random number in EFI stub Lee, Chun-Yi
2015-08-20 14:12 ` Matt Fleming
2015-08-27 4:06 ` joeyli
2015-08-11 6:16 ` [PATCH v2 05/16] x86/efi: Get entropy through EFI random number generator protocol Lee, Chun-Yi
2015-08-20 14:47 ` Matt Fleming
2015-08-27 4:51 ` joeyli
2015-08-20 20:26 ` Matt Fleming
2015-08-27 6:17 ` joeyli
2015-08-11 6:16 ` [PATCH v2 06/16] x86/efi: Generating random HMAC key for siging hibernate image Lee, Chun-Yi
2015-08-20 20:40 ` Matt Fleming
2015-08-27 9:04 ` joeyli
2015-09-09 12:15 ` Matt Fleming
2015-09-13 2:47 ` joeyli
2015-08-11 6:16 ` [PATCH v2 07/16] efi: Make efi_status_to_err() public Lee, Chun-Yi
2015-08-20 15:07 ` Matt Fleming
2015-08-27 9:06 ` joeyli
2015-08-11 6:16 ` [PATCH v2 08/16] x86/efi: Carrying hibernation key by setup data Lee, Chun-Yi
2015-08-15 17:07 ` Pavel Machek
2015-08-16 5:28 ` joeyli
2015-08-16 21:23 ` Jiri Kosina
2015-08-17 6:54 ` Nigel Cunningham
2015-08-21 12:40 ` Matt Fleming
2015-08-27 9:28 ` joeyli
2015-08-11 6:16 ` [PATCH v2 09/16] PM / hibernate: Reserve hibernation key and erase footprints Lee, Chun-Yi
2015-08-13 2:45 ` Chen, Yu C
2015-08-13 3:25 ` joeyli
2015-08-13 14:33 ` joeyli
2015-08-21 13:27 ` Matt Fleming
2015-08-27 10:21 ` joeyli
2015-09-09 12:24 ` Matt Fleming
2015-09-13 2:58 ` joeyli
2015-08-11 6:16 ` [PATCH v2 10/16] PM / hibernate: Generate and verify signature of hibernate snapshot Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 11/16] PM / hibernate: Avoid including hibernation key to hibernate image Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 12/16] PM / hibernate: Forward signature verifying result and key to image kernel Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 13/16] PM / hibernate: Add configuration to enforce signature verification Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 14/16] PM / hibernate: Allow user trigger hibernation key re-generating Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 15/16] PM / hibernate: Bypass verification logic on legacy BIOS Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 16/16] PM / hibernate: Document signature verification of hibernate snapshot Lee, Chun-Yi
-- strict thread matches above, loose matches on Subject: below --
2015-08-11 6:13 [PATCH v2 00/16] Signature " Lee, Chun-Yi
2015-08-11 6:13 ` [PATCH v2 01/16] PM / hibernate: define HMAC algorithm and digest size of hibernation Lee, Chun-Yi
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