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Revert "efi_capsule: Move signature from DTB to .rodata"

This was unfortunately applied despite much discussion about it beiong
the wrong way to implement this feature.

Revert it before too many other things are built on top of it.

This reverts commit ddf67daac39de76d2697d587148f4c2cb768f492.
Signed-off-by: Simon Glass <sjg@chromium.org>
Simon Glass 2 years ago
parent
commit
47a25e81d3

+ 1 - 0
board/emulation/common/Makefile

@@ -2,3 +2,4 @@
 
 obj-$(CONFIG_SYS_MTDPARTS_RUNTIME) += qemu_mtdparts.o
 obj-$(CONFIG_SET_DFU_ALT_INFO) += qemu_dfu.o
+obj-$(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT) += qemu_capsule.o

+ 0 - 2
include/asm-generic/sections.h

@@ -27,8 +27,6 @@ extern char __efi_helloworld_begin[];
 extern char __efi_helloworld_end[];
 extern char __efi_var_file_begin[];
 extern char __efi_var_file_end[];
-extern char __efi_capsule_sig_begin[];
-extern char __efi_capsule_sig_end[];
 
 /* Private data used by of-platdata devices/uclasses */
 extern char __priv_data_start[], __priv_data_end[];

+ 0 - 7
lib/efi_loader/Kconfig

@@ -215,13 +215,6 @@ config EFI_CAPSULE_AUTHENTICATE
 	  Select this option if you want to enable capsule
 	  authentication
 
-config EFI_CAPSULE_KEY_PATH
-	string "Path to .esl cert for capsule authentication"
-	depends on EFI_CAPSULE_AUTHENTICATE
-	help
-	  Provide the EFI signature list (esl) certificate used for capsule
-	  authentication
-
 config EFI_DEVICE_PATH_TO_TEXT
 	bool "Device path to text protocol"
 	default y

+ 0 - 8
lib/efi_loader/Makefile

@@ -20,19 +20,11 @@ always += helloworld.efi
 targets += helloworld.o
 endif
 
-ifeq ($(CONFIG_EFI_CAPSULE_AUTHENTICATE),y)
-EFI_CAPSULE_KEY_PATH := $(subst $\",,$(CONFIG_EFI_CAPSULE_KEY_PATH))
-ifeq ("$(wildcard $(EFI_CAPSULE_KEY_PATH))","")
-$(error .esl certificate not found. Configure your CONFIG_EFI_CAPSULE_KEY_PATH)
-endif
-endif
-
 obj-$(CONFIG_CMD_BOOTEFI_HELLO) += helloworld_efi.o
 obj-$(CONFIG_CMD_BOOTEFI_BOOTMGR) += efi_bootmgr.o
 obj-y += efi_boottime.o
 obj-y += efi_helper.o
 obj-$(CONFIG_EFI_HAVE_CAPSULE_SUPPORT) += efi_capsule.o
-obj-$(CONFIG_EFI_CAPSULE_AUTHENTICATE) += efi_capsule_key.o
 obj-$(CONFIG_EFI_CAPSULE_FIRMWARE) += efi_firmware.o
 obj-y += efi_console.o
 obj-y += efi_device_path.o

+ 3 - 15
lib/efi_loader/efi_capsule.c

@@ -16,7 +16,6 @@
 #include <mapmem.h>
 #include <sort.h>
 
-#include <asm/sections.h>
 #include <crypto/pkcs7.h>
 #include <crypto/pkcs7_parser.h>
 #include <linux/err.h>
@@ -253,23 +252,12 @@ out:
 
 #if defined(CONFIG_EFI_CAPSULE_AUTHENTICATE)
 
-static int efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len)
-{
-	const void *blob = __efi_capsule_sig_begin;
-	const int len = __efi_capsule_sig_end - __efi_capsule_sig_begin;
-
-	*pkey = (void *)blob;
-	*pkey_len = len;
-
-	return 0;
-}
-
 efi_status_t efi_capsule_authenticate(const void *capsule, efi_uintn_t capsule_size,
 				      void **image, efi_uintn_t *image_size)
 {
 	u8 *buf;
 	int ret;
-	void *stored_pkey, *pkey;
+	void *fdt_pkey, *pkey;
 	efi_uintn_t pkey_len;
 	uint64_t monotonic_count;
 	struct efi_signature_store *truststore;
@@ -322,7 +310,7 @@ efi_status_t efi_capsule_authenticate(const void *capsule, efi_uintn_t capsule_s
 		goto out;
 	}
 
-	ret = efi_get_public_key_data(&stored_pkey, &pkey_len);
+	ret = efi_get_public_key_data(&fdt_pkey, &pkey_len);
 	if (ret < 0)
 		goto out;
 
@@ -330,7 +318,7 @@ efi_status_t efi_capsule_authenticate(const void *capsule, efi_uintn_t capsule_s
 	if (!pkey)
 		goto out;
 
-	memcpy(pkey, stored_pkey, pkey_len);
+	memcpy(pkey, fdt_pkey, pkey_len);
 	truststore = efi_build_signature_store(pkey, pkey_len);
 	if (!truststore)
 		goto out;

+ 0 - 17
lib/efi_loader/efi_capsule_key.S

@@ -1,17 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * .esl cert for capsule authentication
- *
- * Copyright (c) 2021, Ilias Apalodimas <ilias.apalodimas@linaro.org>
- */
-
-#include <config.h>
-
-.section .rodata.capsule_key.init,"a"
-.balign 16
-.global __efi_capsule_sig_begin
-__efi_capsule_sig_begin:
-.incbin CONFIG_EFI_CAPSULE_KEY_PATH
-__efi_capsule_sig_end:
-.global __efi_capsule_sig_end
-.balign 16