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stub: split out random seed part out of run()

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This commit is contained in:
Lennart Poettering
2024-06-25 22:45:57 +02:00
parent fb974ac485
commit 201e0d53bd
1 changed files with 27 additions and 10 deletions
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37
src/boot/efi/stub.c
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@@ -510,6 +510,32 @@ static EFI_STATUS load_addons(
return EFI_SUCCESS;
}
static void refresh_random_seed(EFI_LOADED_IMAGE_PROTOCOL *loaded_image) {
EFI_STATUS err;
assert(loaded_image);
/* Handle case, where bootloader doesn't support DeviceHandle. */
if (!loaded_image->DeviceHandle)
return;
uint64_t loader_features = 0;
err = efivar_get_uint64_le(MAKE_GUID_PTR(LOADER), u"LoaderFeatures", &loader_features);
if (err != EFI_SUCCESS)
return;
/* Don't measure again, if sd-boot already initialized the random seed */
if (!FLAGS_SET(loader_features, EFI_LOADER_FEATURE_RANDOM_SEED))
return;
_cleanup_(file_closep) EFI_FILE *esp_dir = NULL;
err = partition_open(MAKE_GUID_PTR(ESP), loaded_image->DeviceHandle, NULL, &esp_dir);
if (err != EFI_SUCCESS) /* Non-fatal on failure, so that we still boot without it. */
return;
(void) process_random_seed(esp_dir);
}
static EFI_STATUS run(EFI_HANDLE image) {
_cleanup_free_ void *credential_initrd = NULL, *global_credential_initrd = NULL, *sysext_initrd = NULL, *confext_initrd = NULL, *pcrsig_initrd = NULL, *pcrpkey_initrd = NULL;
size_t credential_initrd_size = 0, global_credential_initrd_size = 0, sysext_initrd_size = 0, confext_initrd_size = 0, pcrsig_initrd_size = 0, pcrpkey_initrd_size = 0;
@@ -525,22 +551,13 @@ static EFI_STATUS run(EFI_HANDLE image) {
int sections_measured = -1, parameters_measured = -1, sysext_measured = -1, confext_measured = -1;
_cleanup_free_ char *uname = NULL;
bool m;
uint64_t loader_features = 0;
EFI_STATUS err;
err = BS->HandleProtocol(image, MAKE_GUID_PTR(EFI_LOADED_IMAGE_PROTOCOL), (void **) &loaded_image);
if (err != EFI_SUCCESS)
return log_error_status(err, "Error getting a LoadedImageProtocol handle: %m");
if (loaded_image->DeviceHandle && /* Handle case, where bootloader doesn't support DeviceHandle. */
(efivar_get_uint64_le(MAKE_GUID_PTR(LOADER), u"LoaderFeatures", &loader_features) != EFI_SUCCESS ||
!FLAGS_SET(loader_features, EFI_LOADER_FEATURE_RANDOM_SEED))) {
_cleanup_(file_closep) EFI_FILE *esp_dir = NULL;
err = partition_open(MAKE_GUID_PTR(ESP), loaded_image->DeviceHandle, NULL, &esp_dir);
if (err == EFI_SUCCESS) /* Non-fatal on failure, so that we still boot without it. */
(void) process_random_seed(esp_dir);
}
refresh_random_seed(loaded_image);
err = pe_memory_locate_sections(loaded_image->ImageBase, unified_sections, sections);
if (err != EFI_SUCCESS || !PE_SECTION_VECTOR_IS_SET(sections + UNIFIED_SECTION_LINUX)) {