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From e05d4ac57960b9aa81943254f5757405a5217616 Mon Sep 17 00:00:00 2001
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From: Thore Sommer <mail@thson.de>
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Date: Tue, 11 Oct 2022 08:44:44 +0300
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Subject: [PATCH 9/9] tpm2_eventlog_yaml: use defines for Unicode variables
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The used variables and their length are defined as the following:
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- Name: NAME_{VARIABLE_NAME}
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- Length: NAME_{VARIABLE_NAME}_LEN
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Signed-off-by: Thore Sommer <mail@thson.de>
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---
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lib/tpm2_eventlog_yaml.c | 30 +++++++++++++++++++++++-------
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1 file changed, 23 insertions(+), 7 deletions(-)
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diff --git a/lib/tpm2_eventlog_yaml.c b/lib/tpm2_eventlog_yaml.c
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index 0b1d0318..59a5d8fc 100644
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--- a/lib/tpm2_eventlog_yaml.c
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+++ b/lib/tpm2_eventlog_yaml.c
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@@ -23,6 +23,22 @@
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#include <efivar/efivar.h>
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#endif
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+/* Valid variable unicode names and their length */
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+#define NAME_DB "db"
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+#define NAME_DB_LEN 2
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+#define NAME_DBX "dbx"
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+#define NAME_DBX_LEN 3
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+#define NAME_KEK "KEK"
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+#define NAME_KEK_LEN 3
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+#define NAME_PK "PK"
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+#define NAME_PK_LEN 2
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+#define NAME_MOKLISTTRUSTED "MokListTrusted"
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+#define NAME_MOKLISTTRUSTED_LEN 14
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+#define NAME_SECUREBOOT "SecureBoot"
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+#define NAME_SECUREBOOT_LEN 10
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+#define NAME_BOOTORDER "BootOrder"
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+#define NAME_BOOTORDER_LEN 9
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+
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static void guid_unparse_lower(EFI_GUID guid, char guid_buf[37]) {
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snprintf(guid_buf, 37, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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@@ -321,10 +337,10 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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* respectively.
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*/
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if (type == EV_EFI_VARIABLE_DRIVER_CONFIG) {
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- if ((strlen(ret) == 2 && strncmp(ret, "PK", 2) == 0) ||
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- (strlen(ret) == 3 && strncmp(ret, "KEK", 3) == 0) ||
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- (strlen(ret) == 2 && strncmp(ret, "db", 2) == 0) ||
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- (strlen(ret) == 3 && strncmp(ret, "dbx", 3) == 0)) {
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+ if ((strlen(ret) == NAME_PK_LEN && strncmp(ret, NAME_PK, NAME_PK_LEN) == 0) ||
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+ (strlen(ret) == NAME_KEK_LEN && strncmp(ret, NAME_KEK, NAME_KEK_LEN) == 0) ||
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+ (strlen(ret) == NAME_DB_LEN && strncmp(ret, NAME_DB, NAME_DB_LEN) == 0) ||
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+ (strlen(ret) == NAME_DBX_LEN && strncmp(ret, NAME_DBX, NAME_DBX_LEN) == 0)) {
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free(ret);
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tpm2_tool_output(" VariableData:\n");
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@@ -397,7 +413,7 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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variable_data += slist->SignatureListSize;
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}
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return true;
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- } else if ((strlen(ret) == 10 && strncmp(ret, "SecureBoot", 10) == 0)) {
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+ } else if ((strlen(ret) == NAME_SECUREBOOT_LEN && strncmp(ret, NAME_SECUREBOOT, NAME_SECUREBOOT_LEN) == 0)) {
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free(ret);
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tpm2_tool_output(" VariableData:\n"
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" Enabled: ");
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@@ -420,7 +436,7 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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}
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} else if (type == EV_EFI_VARIABLE_AUTHORITY) {
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/* The MokListTrusted is boolean option, not a EFI_SIGNATURE_DATA*/
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- if ((strlen(ret) == 14 && strncmp(ret, "MokListTrusted", 14) == 0)) {
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+ if ((strlen(ret) == NAME_MOKLISTTRUSTED_LEN && strncmp(ret, NAME_MOKLISTTRUSTED, NAME_MOKLISTTRUSTED_LEN) == 0)) {
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free(ret);
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tpm2_tool_output(" VariableData:\n"
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" Enabled: ");
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@@ -462,7 +478,7 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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return true;
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}
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} else if (type == EV_EFI_VARIABLE_BOOT || type == EV_EFI_VARIABLE_BOOT2) {
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- if ((strlen(ret) == 9 && strncmp(ret, "BootOrder", 9) == 0)) {
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+ if ((strlen(ret) == NAME_BOOTORDER_LEN && strncmp(ret, NAME_BOOTORDER, NAME_BOOTORDER_LEN) == 0)) {
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free(ret);
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tpm2_tool_output(" VariableData:\n");
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--
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2.37.3
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