[PATCH v2] efi_loader: migrate SMBIOS 3.0 entry point structure for measurement
Masahisa Kojima
masahisa.kojima at linaro.org
Fri Jan 26 01:53:42 CET 2024
Current U-Boot only supports the SMBIOS 3.0 entry point structure.
TCG2 measurement code should migrate to SMBIOS 3.0 entry
point structure.
efi_selftest tcg2 test also needs to be updated, and expected
PCR[1] result is changed since guid for SMBIOS EFI system table
uses different guid SMBIOS3_TABLE_GUID instead of SMBIOS_TABLE_GUID.
Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
---
Changes in v2:
- add SMBIOS 3.0 anchor string check
include/efi_loader.h | 1 +
include/smbios.h | 4 +-
lib/efi_loader/efi_tcg2.c | 19 ++++--
lib/efi_selftest/efi_selftest_tcg2.c | 97 +++++++++++++---------------
lib/smbios-parser.c | 9 ++-
5 files changed, 66 insertions(+), 64 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h
index d5fca2fa5e..5c5af4f7fd 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -340,6 +340,7 @@ extern const efi_guid_t efi_guid_firmware_management_protocol;
extern const efi_guid_t efi_esrt_guid;
/* GUID of the SMBIOS table */
extern const efi_guid_t smbios_guid;
+extern const efi_guid_t smbios3_guid;
/*GUID of console */
extern const efi_guid_t efi_guid_text_input_protocol;
extern const efi_guid_t efi_guid_text_output_protocol;
diff --git a/include/smbios.h b/include/smbios.h
index b507b9d9d7..e45303d0d3 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -326,10 +326,10 @@ int smbios_update_version_full(void *smbios_tab, const char *version);
* This function clear the device dependent parameters such as
* serial number for the measurement.
*
- * @entry: pointer to a struct smbios_entry
+ * @entry: pointer to a struct smbios3_entry
* @header: pointer to a struct smbios_header
*/
-void smbios_prepare_measurement(const struct smbios_entry *entry,
+void smbios_prepare_measurement(const struct smbios3_entry *entry,
struct smbios_header *header);
#endif /* _SMBIOS_H_ */
diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c
index 8db35d0b3c..85562c50a1 100644
--- a/lib/efi_loader/efi_tcg2.c
+++ b/lib/efi_loader/efi_tcg2.c
@@ -1075,12 +1075,17 @@ error:
*/
static efi_status_t
tcg2_measure_smbios(struct udevice *dev,
- const struct smbios_entry *entry)
+ const struct smbios3_entry *entry)
{
efi_status_t ret;
struct smbios_header *smbios_copy;
struct smbios_handoff_table_pointers2 *event = NULL;
u32 event_size;
+ const char smbios3_anchor[] = "_SM3_";
+
+ /* We only support SMBIOS 3.0 Entry Point structure */
+ if (memcmp(entry->anchor, smbios3_anchor, sizeof(smbios3_anchor) - 1))
+ return EFI_UNSUPPORTED;
/*
* TCG PC Client PFP Spec says
@@ -1093,7 +1098,7 @@ tcg2_measure_smbios(struct udevice *dev,
*/
event_size = sizeof(struct smbios_handoff_table_pointers2) +
FIELD_SIZEOF(struct efi_configuration_table, guid) +
- entry->struct_table_length;
+ entry->max_struct_size;
event = calloc(1, event_size);
if (!event) {
ret = EFI_OUT_OF_RESOURCES;
@@ -1104,11 +1109,11 @@ tcg2_measure_smbios(struct udevice *dev,
memcpy(event->table_description, SMBIOS_HANDOFF_TABLE_DESC,
sizeof(SMBIOS_HANDOFF_TABLE_DESC));
put_unaligned_le64(1, &event->number_of_tables);
- guidcpy(&event->table_entry[0].guid, &smbios_guid);
+ guidcpy(&event->table_entry[0].guid, &smbios3_guid);
smbios_copy = (struct smbios_header *)((uintptr_t)&event->table_entry[0].table);
memcpy(&event->table_entry[0].table,
(void *)((uintptr_t)entry->struct_table_address),
- entry->struct_table_length);
+ entry->max_struct_size);
smbios_prepare_measurement(entry, smbios_copy);
@@ -1133,7 +1138,7 @@ static void *find_smbios_table(void)
u32 i;
for (i = 0; i < systab.nr_tables; i++) {
- if (!guidcmp(&smbios_guid, &systab.tables[i].guid))
+ if (!guidcmp(&smbios3_guid, &systab.tables[i].guid))
return systab.tables[i].table;
}
@@ -1360,7 +1365,7 @@ efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *ha
u32 pcr_index;
struct udevice *dev;
u32 event = 0;
- struct smbios_entry *entry;
+ struct smbios3_entry *entry;
if (!is_tcg2_protocol_installed())
return EFI_SUCCESS;
@@ -1382,7 +1387,7 @@ efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *ha
if (ret != EFI_SUCCESS)
goto out;
- entry = (struct smbios_entry *)find_smbios_table();
+ entry = (struct smbios3_entry *)find_smbios_table();
if (entry) {
ret = tcg2_measure_smbios(dev, entry);
if (ret != EFI_SUCCESS)
diff --git a/lib/efi_selftest/efi_selftest_tcg2.c b/lib/efi_selftest/efi_selftest_tcg2.c
index 67a886efaa..fb8b997653 100644
--- a/lib/efi_selftest/efi_selftest_tcg2.c
+++ b/lib/efi_selftest/efi_selftest_tcg2.c
@@ -126,41 +126,40 @@ static u8 boot_order[] = {0x02, 0x10, 0x00, 0x10, 0x01, 0x10};
static void *orig_smbios_table;
static u64 dmi_addr = U32_MAX;
-#define SMBIOS_ENTRY_HEADER_SIZE 0x20
+#define SMBIOS3_ENTRY_HEADER_SIZE 0x18
/* smbios table for the measurement test */
-static u8 smbios_table_test[] = {
-0x5f, 0x53, 0x4d, 0x5f, 0x2c, 0x1f, 0x03, 0x00, 0x54, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x5f, 0x44, 0x4d, 0x49, 0x5f, 0xe4, 0x5c, 0x01,
-0x20, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00,
-0x01, 0x02, 0x00, 0x00, 0x03, 0x00, 0x80, 0x08, 0x01, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x0c, 0x15, 0x0a, 0xff, 0xff, 0x55, 0x2d, 0x42, 0x6f,
-0x6f, 0x74, 0x00, 0x32, 0x30, 0x32, 0x31, 0x2e, 0x31, 0x30, 0x2d, 0x72,
-0x63, 0x34, 0x2d, 0x30, 0x30, 0x30, 0x30, 0x35, 0x2d, 0x67, 0x37, 0x32,
-0x37, 0x63, 0x33, 0x66, 0x33, 0x32, 0x35, 0x39, 0x2d, 0x64, 0x69, 0x72,
-0x74, 0x79, 0x00, 0x31, 0x30, 0x2f, 0x30, 0x31, 0x2f, 0x32, 0x30, 0x32,
-0x31, 0x00, 0x00, 0x01, 0x1b, 0x01, 0x00, 0x01, 0x02, 0x00, 0x03, 0x31,
-0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
-0x6e, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x20, 0x50, 0x72,
-0x6f, 0x64, 0x75, 0x63, 0x74, 0x00, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
-0x37, 0x38, 0x00, 0x00, 0x02, 0x0e, 0x02, 0x00, 0x01, 0x02, 0x00, 0x04,
-0x03, 0x01, 0x01, 0x01, 0x00, 0x0a, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
-0x6e, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x20, 0x50, 0x72,
-0x6f, 0x64, 0x75, 0x63, 0x74, 0x00, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-0x33, 0x33, 0x00, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00,
-0x00, 0x03, 0x15, 0x03, 0x00, 0x01, 0x03, 0x00, 0x02, 0x03, 0x03, 0x03,
-0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x6e,
-0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x00, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
-0x37, 0x38, 0x00, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x00,
-0x00, 0x04, 0x30, 0x04, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x01, 0x06, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x02, 0x03, 0x04,
-0x04, 0x04, 0x08, 0x00, 0x00, 0x02, 0x00, 0x08, 0x00, 0x08, 0x00, 0x01,
-0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x00, 0x31, 0x32, 0x33,
-0x34, 0x35, 0x36, 0x37, 0x38, 0x00, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33,
-0x33, 0x33, 0x00, 0x35, 0x35, 0x35, 0x35, 0x35, 0x35, 0x35, 0x35, 0x00,
-0x00, 0x20, 0x0b, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x7f, 0x04, 0x06, 0x00, 0x00, 0x00
+static u8 smbios3_table_test[] = {
+0x5f, 0x53, 0x4d, 0x33, 0x5f, 0x00, 0x18, 0x03, 0x07, 0x00, 0x01, 0x00,
+0x5c, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x18, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x03, 0x00, 0x80, 0x08,
+0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x15, 0x0a, 0xff, 0xff,
+0x55, 0x2d, 0x42, 0x6f, 0x6f, 0x74, 0x00, 0x32, 0x30, 0x32, 0x31, 0x2e,
+0x31, 0x30, 0x2d, 0x72, 0x63, 0x34, 0x2d, 0x30, 0x30, 0x30, 0x30, 0x35,
+0x2d, 0x67, 0x37, 0x32, 0x37, 0x63, 0x33, 0x66, 0x33, 0x32, 0x35, 0x39,
+0x2d, 0x64, 0x69, 0x72, 0x74, 0x79, 0x00, 0x31, 0x30, 0x2f, 0x30, 0x31,
+0x2f, 0x32, 0x30, 0x32, 0x31, 0x00, 0x00, 0x01, 0x1b, 0x01, 0x00, 0x01,
+0x02, 0x00, 0x03, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x55, 0x6e,
+0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
+0x6e, 0x20, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x00, 0x31, 0x32,
+0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00, 0x00, 0x02, 0x0e, 0x02, 0x00,
+0x01, 0x02, 0x00, 0x04, 0x03, 0x01, 0x01, 0x01, 0x00, 0x0a, 0x55, 0x6e,
+0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
+0x6e, 0x20, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x00, 0x33, 0x33,
+0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x00, 0x31, 0x32, 0x33, 0x34, 0x35,
+0x36, 0x37, 0x38, 0x00, 0x00, 0x03, 0x15, 0x03, 0x00, 0x01, 0x03, 0x00,
+0x02, 0x03, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x00, 0x31, 0x32,
+0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00, 0x33, 0x33, 0x33, 0x33, 0x33,
+0x33, 0x33, 0x33, 0x00, 0x00, 0x04, 0x30, 0x04, 0x00, 0x00, 0x03, 0x02,
+0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x0c, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x06, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0x02, 0x03, 0x04, 0x04, 0x04, 0x08, 0x00, 0x00, 0x02, 0x00, 0x08,
+0x00, 0x08, 0x00, 0x01, 0x00, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e,
+0x00, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x00, 0x33, 0x33,
+0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x00, 0x35, 0x35, 0x35, 0x35, 0x35,
+0x35, 0x35, 0x35, 0x00, 0x00, 0x20, 0x0b, 0x05, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x04, 0x06, 0x00, 0x00, 0x00
};
#define IDX_ARRAY_SZ 3 /* support 24 PCRs */
@@ -179,10 +178,10 @@ static u8 expected_pcrs[EFI_TCG2_MAX_PCR_INDEX + 1][TPM2_SHA256_DIGEST_SIZE] = {
0x7b, 0xb9, 0xfe, 0xa1, 0xcd, 0x64, 0x49, 0xdd,
0xed, 0xe2, 0x65, 0x82, 0xc5, 0x3e, 0xf4, 0xc4},
- {0xf5, 0x79, 0xf3, 0x20, 0x62, 0x6e, 0x8b, 0x58,
- 0x62, 0xa3, 0x4e, 0x2f, 0xb7, 0x10, 0xac, 0x34,
- 0x4e, 0x68, 0x94, 0x37, 0x87, 0x29, 0xc4, 0xbe,
- 0xa3, 0xc4, 0xd9, 0x14, 0x2b, 0x66, 0x79, 0x9b},
+ {0x75, 0xb5, 0x91, 0x54, 0x12, 0xa8, 0xa4, 0x25,
+ 0x73, 0x79, 0xa7, 0x47, 0xd9, 0x32, 0x54, 0x78,
+ 0x9a, 0x80, 0x3f, 0xa8, 0x34, 0xfe, 0xd2, 0xae,
+ 0x76, 0xd3, 0x16, 0x4a, 0xb2, 0x03, 0xac, 0xe6},
{0x3d, 0x45, 0x8c, 0xfe, 0x55, 0xcc, 0x03, 0xea,
0x1f, 0x44, 0x3f, 0x15, 0x62, 0xbe, 0xec, 0x8d,
@@ -543,7 +542,7 @@ static void *find_smbios_table(const struct efi_system_table *systable)
u32 i;
for (i = 0; i < systable->nr_tables; i++) {
- if (!guidcmp(&smbios_guid, &systable->tables[i].guid))
+ if (!guidcmp(&smbios3_guid, &systable->tables[i].guid))
return systable->tables[i].table;
}
@@ -558,14 +557,12 @@ static void *find_smbios_table(const struct efi_system_table *systable)
*/
static efi_status_t setup_smbios_table(const struct efi_system_table *systable)
{
- struct smbios_entry *se;
+ struct smbios3_entry *se;
efi_status_t ret;
/* Map within the low 32 bits, to allow for 32bit SMBIOS tables */
void *dmi;
- char *istart;
- int isize;
- if (sizeof(smbios_table_test) > EFI_PAGE_SIZE)
+ if (sizeof(smbios3_table_test) > EFI_PAGE_SIZE)
return EFI_OUT_OF_RESOURCES;
orig_smbios_table = find_smbios_table(systable);
@@ -586,19 +583,15 @@ static efi_status_t setup_smbios_table(const struct efi_system_table *systable)
dmi = (void *)(uintptr_t)dmi_addr;
se = dmi;
- boottime->copy_mem(se, smbios_table_test, sizeof(smbios_table_test));
+ boottime->copy_mem(se, smbios3_table_test, sizeof(smbios3_table_test));
/* update smbios table start address */
- se->struct_table_address = (uintptr_t)((u8 *)dmi + SMBIOS_ENTRY_HEADER_SIZE);
+ se->struct_table_address = (uintptr_t)((u8 *)dmi + SMBIOS3_ENTRY_HEADER_SIZE);
- /* calculate checksums */
- istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
- isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
- se->intermediate_checksum = table_compute_checksum(istart, isize);
- se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
+ se->checksum = table_compute_checksum(se, sizeof(struct smbios3_entry));
/* Install SMBIOS information as configuration table */
- ret = boottime->install_configuration_table(&smbios_guid, dmi);
+ ret = boottime->install_configuration_table(&smbios3_guid, dmi);
if (ret != EFI_SUCCESS) {
efi_st_error("Cannot install SMBIOS table\n");
boottime->free_pages(dmi_addr, 1);
@@ -992,7 +985,7 @@ static int efi_st_tcg2_teardown(void)
* If orig_smbios_table is NULL, calling install_configuration_table()
* removes dummy SMBIOS table form systab.
*/
- r = boottime->install_configuration_table(&smbios_guid, orig_smbios_table);
+ r = boottime->install_configuration_table(&smbios3_guid, orig_smbios_table);
if (r != EFI_SUCCESS) {
efi_st_error("Failed to restore SMBOIS table\n");
return EFI_ST_FAILURE;
diff --git a/lib/smbios-parser.c b/lib/smbios-parser.c
index ac9a367a87..f48d743657 100644
--- a/lib/smbios-parser.c
+++ b/lib/smbios-parser.c
@@ -223,21 +223,24 @@ static void clear_smbios_table(struct smbios_header *header,
}
}
-void smbios_prepare_measurement(const struct smbios_entry *entry,
+void smbios_prepare_measurement(const struct smbios3_entry *entry,
struct smbios_header *smbios_copy)
{
u32 i, j;
+ void *table_end;
struct smbios_header *header;
+ table_end = (void *)((u8 *)smbios_copy + entry->max_struct_size);
+
for (i = 0; i < ARRAY_SIZE(smbios_filter_tables); i++) {
header = smbios_copy;
- for (j = 0; j < entry->struct_count; j++) {
+ for (j = 0; (void *)header < table_end; j++) {
if (header->type == smbios_filter_tables[i].type)
break;
header = get_next_header(header);
}
- if (j >= entry->struct_count)
+ if ((void *)header >= table_end)
continue;
clear_smbios_table(header,
--
2.34.1
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