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| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-07-14 22:25:28 +0300 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-07-16 13:37:02 +0300 |
| commit | 7dda16343d2577a52116148540ad7d17c6f19e55 (patch) | |
| tree | 550e764fb23579aec71b523608fdd5f1d95507e4 /lib/efi_loader/efi_variable.c | |
| parent | 99bfab8b5832273d66d724f906be43fe5bd7c1ba (diff) | |
| download | u-boot-7dda16343d2577a52116148540ad7d17c6f19e55.tar.xz | |
efi_loader: pre-seed UEFI variables
Include a file with the initial values for non-volatile UEFI variables
into the U-Boot binary. If this variable is set, changes to variable PK
will not be allowed.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib/efi_loader/efi_variable.c')
| -rw-r--r-- | lib/efi_loader/efi_variable.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index ecbc4f7f54..39a8482903 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -5,12 +5,15 @@ * Copyright (c) 2017 Rob Clark */ +#define LOG_CATEGORY LOGC_EFI + #include <common.h> #include <efi_loader.h> #include <efi_variable.h> #include <env.h> #include <env_internal.h> #include <hexdump.h> +#include <log.h> #include <malloc.h> #include <rtc.h> #include <search.h> @@ -18,7 +21,7 @@ #include <crypto/pkcs7_parser.h> #include <linux/compat.h> #include <u-boot/crc.h> - +#include <asm/sections.h> #ifdef CONFIG_EFI_SECURE_BOOT static u8 pkcs7_hdr[] = { @@ -365,10 +368,16 @@ efi_status_t efi_set_variable_int(u16 *variable_name, const efi_guid_t *vendor, delete = !append && (!data_size || !attributes); /* check attributes */ + var_type = efi_auth_var_get_type(variable_name, vendor); if (var) { if (ro_check && (var->attr & EFI_VARIABLE_READ_ONLY)) return EFI_WRITE_PROTECTED; + if (IS_ENABLED(CONFIG_EFI_VARIABLES_PRESEED)) { + if (var_type != EFI_AUTH_VAR_NONE) + return EFI_WRITE_PROTECTED; + } + /* attributes won't be changed */ if (!delete && ((ro_check && var->attr != attributes) || @@ -386,7 +395,6 @@ efi_status_t efi_set_variable_int(u16 *variable_name, const efi_guid_t *vendor, return EFI_NOT_FOUND; } - var_type = efi_auth_var_get_type(variable_name, vendor); if (var_type != EFI_AUTH_VAR_NONE) { /* authentication is mandatory */ if (!(attributes & @@ -589,5 +597,12 @@ efi_status_t efi_init_variables(void) if (ret != EFI_SUCCESS) return ret; + if (IS_ENABLED(CONFIG_EFI_VARIABLES_PRESEED)) { + ret = efi_var_restore((struct efi_var_file *) + __efi_var_file_begin); + if (ret != EFI_SUCCESS) + log_err("Invalid EFI variable seed\n"); + } + return efi_var_from_file(); } |