Tool to manage UEFI Secure Boot MoK Keys
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

114 lines
4.8 KiB

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Harry Youd <harry@harryyoud.co.uk>
Date: Wed, 31 Jul 2019 19:44:53 +0100
Subject: [PATCH] Avoid taking pointer to packed struct
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Fixes:
error: taking address of packed member of ‘struct <anonymous>’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
---
src/mokutil.c | 38 ++++++++++++++++++++++----------------
1 file changed, 22 insertions(+), 16 deletions(-)
diff --git a/src/mokutil.c b/src/mokutil.c
index e2d567d..8892613 100644
--- a/src/mokutil.c
+++ b/src/mokutil.c
@@ -270,20 +270,22 @@ build_mok_list (void *data, unsigned long data_size, uint32_t *mok_num)
return NULL;
}
- if ((efi_guid_cmp (&CertList->SignatureType, &efi_guid_x509_cert) != 0) &&
- (efi_guid_cmp (&CertList->SignatureType, &efi_guid_sha1) != 0) &&
- (efi_guid_cmp (&CertList->SignatureType, &efi_guid_sha224) != 0) &&
- (efi_guid_cmp (&CertList->SignatureType, &efi_guid_sha256) != 0) &&
- (efi_guid_cmp (&CertList->SignatureType, &efi_guid_sha384) != 0) &&
- (efi_guid_cmp (&CertList->SignatureType, &efi_guid_sha512) != 0)) {
+ efi_guid_t sigtype = CertList->SignatureType;
+
+ if ((efi_guid_cmp (&sigtype, &efi_guid_x509_cert) != 0) &&
+ (efi_guid_cmp (&sigtype, &efi_guid_sha1) != 0) &&
+ (efi_guid_cmp (&sigtype, &efi_guid_sha224) != 0) &&
+ (efi_guid_cmp (&sigtype, &efi_guid_sha256) != 0) &&
+ (efi_guid_cmp (&sigtype, &efi_guid_sha384) != 0) &&
+ (efi_guid_cmp (&sigtype, &efi_guid_sha512) != 0)) {
dbsize -= CertList->SignatureListSize;
CertList = (EFI_SIGNATURE_LIST *)((uint8_t *) CertList +
CertList->SignatureListSize);
continue;
}
- if ((efi_guid_cmp (&CertList->SignatureType, &efi_guid_x509_cert) != 0) &&
- (CertList->SignatureSize != signature_size (&CertList->SignatureType))) {
+ if ((efi_guid_cmp (&sigtype, &efi_guid_x509_cert) != 0) &&
+ (CertList->SignatureSize != signature_size (&sigtype))) {
dbsize -= CertList->SignatureListSize;
CertList = (EFI_SIGNATURE_LIST *)((uint8_t *) CertList +
CertList->SignatureListSize);
@@ -312,7 +314,7 @@ build_mok_list (void *data, unsigned long data_size, uint32_t *mok_num)
}
list[count].header = CertList;
- if (efi_guid_cmp (&CertList->SignatureType, &efi_guid_x509_cert) == 0) {
+ if (efi_guid_cmp (&sigtype, &efi_guid_x509_cert) == 0) {
/* X509 certificate */
list[count].mok_size = CertList->SignatureSize -
sizeof(efi_guid_t);
@@ -442,10 +444,11 @@ list_keys (uint8_t *data, size_t data_size)
for (unsigned int i = 0; i < mok_num; i++) {
printf ("[key %d]\n", i+1);
- if (efi_guid_cmp (&list[i].header->SignatureType, &efi_guid_x509_cert) == 0) {
+ efi_guid_t sigtype = list[i].header->SignatureType;
+ if (efi_guid_cmp (&sigtype, &efi_guid_x509_cert) == 0) {
print_x509 ((char *)list[i].mok, list[i].mok_size);
} else {
- print_hash_array (&list[i].header->SignatureType,
+ print_hash_array (&sigtype,
list[i].mok, list[i].mok_size);
}
if (i < mok_num - 1)
@@ -523,7 +526,8 @@ delete_data_from_list (const efi_guid_t *var_guid, const char *var_name,
remain = total;
for (unsigned int i = 0; i < mok_num; i++) {
remain -= list[i].header->SignatureListSize;
- if (efi_guid_cmp (&list[i].header->SignatureType, type) != 0)
+ efi_guid_t sigtype = list[i].header->SignatureType;
+ if (efi_guid_cmp (&sigtype, type) != 0)
continue;
sig_list_size = list[i].header->SignatureListSize;
@@ -1057,7 +1061,8 @@ is_duplicate (const efi_guid_t *type, const void *data, const uint32_t data_size
}
for (unsigned int i = 0; i < node_num; i++) {
- if (efi_guid_cmp (&list[i].header->SignatureType, type) != 0)
+ efi_guid_t sigtype = list[i].header->SignatureType;
+ if (efi_guid_cmp (&sigtype, type) != 0)
continue;
if (efi_guid_cmp (type, &efi_guid_x509_cert) == 0) {
@@ -1510,8 +1515,8 @@ issue_hash_request (const char *hash_str, MokRequest req,
goto error;
/* Check if there is a signature list with the same type */
for (unsigned int i = 0; i < mok_num; i++) {
- if (efi_guid_cmp (&mok_list[i].header->SignatureType,
- &hash_type) == 0) {
+ efi_guid_t sigtype = mok_list[i].header->SignatureType;
+ if (efi_guid_cmp (&sigtype, &hash_type) == 0) {
merge_ind = i;
list_size -= sizeof(EFI_SIGNATURE_LIST);
break;
@@ -1678,8 +1683,9 @@ export_db_keys (const DBName db_name)
for (unsigned i = 0; i < mok_num; i++) {
off_t offset = 0;
ssize_t write_size;
+ efi_guid_t sigtype = list[i].header->SignatureType;
- if (efi_guid_cmp (&list[i].header->SignatureType, &efi_guid_x509_cert) != 0)
+ if (efi_guid_cmp (&sigtype, &efi_guid_x509_cert) != 0)
continue;
/* Dump X509 certificate to files */