linux-kernel - [PATCH v2 3/7] efi: Add EFI signature data types

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Message-Id: <20181208202705.18673-4-nayna@linux.ibm.com>
Date:   Sun,  9 Dec 2018 01:57:01 +0530
From:   Nayna Jain <nayna@...ux.ibm.com>
To:     linux-integrity@...r.kernel.org
Cc:     linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org, zohar@...ux.ibm.com,
        dhowells@...hat.com, jforbes@...hat.com,
        seth.forshee@...onical.com, kexec@...ts.infradead.org,
        keyrings@...r.kernel.org, vgoyal@...hat.com, ebiederm@...ssion.com,
        mpe@...erman.id.au
Subject: [PATCH v2 3/7] efi: Add EFI signature data types

From: Dave Howells <dhowells@...hat.com>

Add the data types that are used for containing hashes, keys and
certificates for cryptographic verification along with their corresponding
type GUIDs.

Signed-off-by: David Howells <dhowells@...hat.com>
Acked-by: Nayna Jain <nayna@...ux.ibm.com>
Acked-by: Serge Hallyn <serge@...lyn.com>
---
Changelog:

v0:
- No changes

 include/linux/efi.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 845174e113ce..214516b29b36 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -663,6 +663,10 @@ void efi_native_runtime_setup(void);
 #define EFI_IMAGE_SECURITY_DATABASE_GUID	EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596,  0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
 #define EFI_SHIM_LOCK_GUID			EFI_GUID(0x605dab50, 0xe046, 0x4300,  0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
 
+#define EFI_CERT_SHA256_GUID			EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)
+#define EFI_CERT_X509_GUID			EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)
+#define EFI_CERT_X509_SHA256_GUID		EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)
+
 /*
  * This GUID is used to pass to the kernel proper the struct screen_info
  * structure that was populated by the stub based on the GOP protocol instance
@@ -934,6 +938,27 @@ typedef struct {
 	efi_memory_desc_t entry[0];
 } efi_memory_attributes_table_t;
 
+typedef struct  {
+	efi_guid_t signature_owner;
+	u8 signature_data[];
+} efi_signature_data_t;
+
+typedef struct {
+	efi_guid_t signature_type;
+	u32 signature_list_size;
+	u32 signature_header_size;
+	u32 signature_size;
+	u8 signature_header[];
+	/* efi_signature_data_t signatures[][] */
+} efi_signature_list_t;
+
+typedef u8 efi_sha256_hash_t[32];
+
+typedef struct {
+	efi_sha256_hash_t to_be_signed_hash;
+	efi_time_t time_of_revocation;
+} efi_cert_x509_sha256_t;
+
 /*
  * All runtime access to EFI goes through this structure:
  */
-- 
2.13.6