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efi_loader: simplify tcg2_measure_secure_boot_variable()

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Don't duplicate GUIDs.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt 2021-09-09 08:50:01 +02:00
parent 02fef8b101
commit a45dac1785
1 changed files with 13 additions and 16 deletions
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29
lib/efi_loader/efi_tcg2.c
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@ -11,6 +11,7 @@
#include <common.h>
#include <dm.h>
#include <efi_loader.h>
#include <efi_variable.h>
#include <efi_tcg2.h>
#include <log.h>
#include <malloc.h>
@ -79,17 +80,12 @@ static const struct digest_info hash_algo_list[] = {
},
};
struct variable_info {
u16 *name;
const efi_guid_t *guid;
};
static struct variable_info secure_variables[] = {
{L"SecureBoot", &efi_global_variable_guid},
{L"PK", &efi_global_variable_guid},
{L"KEK", &efi_global_variable_guid},
{L"db", &efi_guid_image_security_database},
{L"dbx", &efi_guid_image_security_database},
static const u16 *secure_variables[] = {
u"SecureBoot",
u"PK",
u"KEK",
u"db",
u"dbx",
};
#define MAX_HASH_COUNT ARRAY_SIZE(hash_algo_list)
@ -1594,19 +1590,20 @@ static efi_status_t tcg2_measure_secure_boot_variable(struct udevice *dev)
count = ARRAY_SIZE(secure_variables);
for (i = 0; i < count; i++) {
const efi_guid_t *guid;
guid = efi_auth_var_get_guid(secure_variables[i]);
/*
* According to the TCG2 PC Client PFP spec, "SecureBoot",
* "PK", "KEK", "db" and "dbx" variables must be measured
* even if they are empty.
*/
data = efi_get_var(secure_variables[i].name,
secure_variables[i].guid,
&data_size);
data = efi_get_var(secure_variables[i], guid, &data_size);
ret = tcg2_measure_variable(dev, 7,
EV_EFI_VARIABLE_DRIVER_CONFIG,
secure_variables[i].name,
secure_variables[i].guid,
secure_variables[i], guid,
data_size, data);
free(data);
if (ret != EFI_SUCCESS)