revert: replace in-tree Event Log Lib w/ submodule
This reverts commit cc89c2fc40c74ea8d8f1a1489ea988c66c1b5849.
Reason for revert: Causing CI failures
Change-Id: Iad32fb9ba1d32044ef647f01e3091e9b0ee0d9e2
diff --git a/lib/event_log/event_handoff.c b/lib/event_log/event_handoff.c
new file mode 100644
index 0000000..238ea27
--- /dev/null
+++ b/lib/event_log/event_handoff.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2025, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stddef.h>
+
+#include <common/debug.h>
+#include <drivers/measured_boot/event_log/event_handoff.h>
+
+#include <platform_def.h>
+
+static uint8_t *get_log_ptr(struct transfer_list_entry *te, size_t offset)
+{
+ uint8_t *base_ptr = transfer_list_entry_data(te);
+
+ if (base_ptr == NULL) {
+ return NULL;
+ }
+
+ return base_ptr + offset;
+}
+
+uint8_t *transfer_list_event_log_extend(struct transfer_list_header *tl,
+ size_t req_size, size_t *free)
+{
+ struct transfer_list_entry *existing_entry;
+ struct transfer_list_entry *new_entry;
+ uint8_t *old_data;
+ size_t existing_offset;
+ size_t old_size;
+
+ if (tl == NULL || free == NULL || req_size == 0) {
+ ERROR("Invalid arguments to event log extend.\n");
+ return NULL;
+ }
+
+ existing_entry = transfer_list_find(tl, TL_TAG_TPM_EVLOG);
+ existing_offset = EVENT_LOG_RESERVED_BYTES;
+
+ if (existing_entry != NULL) {
+ existing_offset = existing_entry->data_size;
+
+ if (transfer_list_set_data_size(tl, existing_entry,
+ req_size + existing_offset)) {
+ VERBOSE("TPM event log entry resized: new space %zu bytes at offset %zu\n",
+ req_size, existing_offset);
+
+ *free = existing_entry->data_size - existing_offset;
+
+ return get_log_ptr(existing_entry, existing_offset);
+ }
+ }
+
+ /* Add new entry (resize failed or no existing entry) */
+ new_entry = transfer_list_add(tl, TL_TAG_TPM_EVLOG,
+ req_size + existing_offset, NULL);
+
+ if (new_entry == NULL) {
+ ERROR("Failed to add TPM event log entry to transfer list.\n");
+ return NULL;
+ }
+
+ VERBOSE("New TPM event log entry added at %p\n",
+ transfer_list_entry_data(new_entry));
+
+ if (existing_entry != NULL) {
+ old_data = transfer_list_entry_data(existing_entry);
+ old_size = existing_offset;
+
+ VERBOSE("Copying existing event log (%zu bytes) to new entry at %p\n",
+ old_size, transfer_list_entry_data(new_entry));
+
+ memmove(transfer_list_entry_data(new_entry), old_data,
+ old_size);
+
+ transfer_list_rem(tl, existing_entry);
+ }
+
+ *free = new_entry->data_size - existing_offset;
+
+ return get_log_ptr(new_entry, existing_offset);
+}
+
+uint8_t *transfer_list_event_log_finish(struct transfer_list_header *tl,
+ uintptr_t cursor)
+{
+ uintptr_t entry_data_base;
+ size_t final_log_size;
+ struct transfer_list_entry *entry;
+
+ entry = transfer_list_find(tl, TL_TAG_TPM_EVLOG);
+ entry_data_base = (uintptr_t)transfer_list_entry_data(entry);
+
+ if (cursor < entry_data_base ||
+ cursor >= entry_data_base + entry->data_size) {
+ ERROR("Invalid cursor: outside event log bounds.\n");
+ return NULL;
+ }
+
+ final_log_size = cursor - entry_data_base;
+
+ if (!transfer_list_set_data_size(tl, entry, final_log_size)) {
+ ERROR("Unable to resize event log TE.\n");
+ return NULL;
+ }
+
+ transfer_list_update_checksum(tl);
+
+ VERBOSE("TPM event log finalized: trimmed to %zu bytes",
+ final_log_size - EVENT_LOG_RESERVED_BYTES);
+
+ /* Ensure changes are visible to the next stage. */
+ flush_dcache_range((uintptr_t)tl, tl->size);
+
+ return get_log_ptr(entry, EVENT_LOG_RESERVED_BYTES);
+}
diff --git a/lib/event_log/event_log.c b/lib/event_log/event_log.c
new file mode 100644
index 0000000..761ff29
--- /dev/null
+++ b/lib/event_log/event_log.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 2020-2025, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+
+#include "crypto_mod.h"
+#include "event_log.h"
+
+#if TPM_ALG_ID == TPM_ALG_SHA512
+#define CRYPTO_MD_ID CRYPTO_MD_SHA512
+#elif TPM_ALG_ID == TPM_ALG_SHA384
+#define CRYPTO_MD_ID CRYPTO_MD_SHA384
+#elif TPM_ALG_ID == TPM_ALG_SHA256
+#define CRYPTO_MD_ID CRYPTO_MD_SHA256
+#else
+# error Invalid TPM algorithm.
+#endif /* TPM_ALG_ID */
+
+/* Running Event Log Pointer */
+static uint8_t *log_ptr;
+
+/* Pointer to the first byte past end of the Event Log buffer */
+static uintptr_t log_end;
+
+/* TCG_EfiSpecIdEvent */
+static const id_event_headers_t id_event_header = {
+ .header = {
+ .pcr_index = PCR_0,
+ .event_type = EV_NO_ACTION,
+ .digest = {0},
+ .event_size = (uint32_t)(sizeof(id_event_struct_t) +
+ (sizeof(id_event_algorithm_size_t) *
+ HASH_ALG_COUNT))
+ },
+
+ .struct_header = {
+ .signature = TCG_ID_EVENT_SIGNATURE_03,
+ .platform_class = PLATFORM_CLASS_CLIENT,
+ .spec_version_minor = TCG_SPEC_VERSION_MINOR_TPM2,
+ .spec_version_major = TCG_SPEC_VERSION_MAJOR_TPM2,
+ .spec_errata = TCG_SPEC_ERRATA_TPM2,
+ .uintn_size = (uint8_t)(sizeof(unsigned int) /
+ sizeof(uint32_t)),
+ .number_of_algorithms = HASH_ALG_COUNT
+ }
+};
+
+static const event2_header_t locality_event_header = {
+ /*
+ * All EV_NO_ACTION events SHALL set
+ * TCG_PCR_EVENT2.pcrIndex = 0, unless otherwise specified
+ */
+ .pcr_index = PCR_0,
+
+ /*
+ * All EV_NO_ACTION events SHALL set
+ * TCG_PCR_EVENT2.eventType = 03h
+ */
+ .event_type = EV_NO_ACTION,
+
+ /*
+ * All EV_NO_ACTION events SHALL set TCG_PCR_EVENT2.digests to all
+ * 0x00's for each allocated Hash algorithm
+ */
+ .digests = {
+ .count = HASH_ALG_COUNT
+ }
+};
+
+int event_log_record(const uint8_t *hash, uint32_t event_type,
+ const event_log_metadata_t *metadata_ptr)
+{
+ void *ptr = log_ptr;
+ uint32_t name_len = 0U;
+
+ /* event_log_buf_init() must have been called prior to this. */
+ if (hash == NULL || metadata_ptr == NULL || log_ptr == NULL) {
+ return -EINVAL;
+ }
+
+ if (metadata_ptr->name != NULL) {
+ name_len = (uint32_t)strlen(metadata_ptr->name) + 1U;
+ }
+
+ /* Check for space in Event Log buffer */
+ if (((uintptr_t)ptr + (uint32_t)EVENT2_HDR_SIZE + name_len) > log_end) {
+ return -ENOMEM;
+ }
+
+ /*
+ * As per TCG specifications, firmware components that are measured
+ * into PCR[0] must be logged in the event log using the event type
+ * EV_POST_CODE.
+ */
+ /* TCG_PCR_EVENT2.PCRIndex */
+ ((event2_header_t *)ptr)->pcr_index = metadata_ptr->pcr;
+
+ /* TCG_PCR_EVENT2.EventType */
+ ((event2_header_t *)ptr)->event_type = event_type;
+
+ /* TCG_PCR_EVENT2.Digests.Count */
+ ptr = (uint8_t *)ptr + offsetof(event2_header_t, digests);
+ ((tpml_digest_values *)ptr)->count = HASH_ALG_COUNT;
+
+ /* TCG_PCR_EVENT2.Digests[] */
+ ptr = (uint8_t *)((uintptr_t)ptr +
+ offsetof(tpml_digest_values, digests));
+
+ /* TCG_PCR_EVENT2.Digests[].AlgorithmId */
+ ((tpmt_ha *)ptr)->algorithm_id = TPM_ALG_ID;
+
+ /* TCG_PCR_EVENT2.Digests[].Digest[] */
+ ptr = (uint8_t *)((uintptr_t)ptr + offsetof(tpmt_ha, digest));
+
+ /* Copy digest */
+ (void)memcpy(ptr, (const void *)hash, TCG_DIGEST_SIZE);
+
+ /* TCG_PCR_EVENT2.EventSize */
+ ptr = (uint8_t *)((uintptr_t)ptr + TCG_DIGEST_SIZE);
+ ((event2_data_t *)ptr)->event_size = name_len;
+
+ /* Copy event data to TCG_PCR_EVENT2.Event */
+ if (metadata_ptr->name != NULL) {
+ (void)memcpy((void *)(((event2_data_t *)ptr)->event),
+ (const void *)metadata_ptr->name, name_len);
+ }
+
+ /* End of event data */
+ log_ptr = (uint8_t *)((uintptr_t)ptr +
+ offsetof(event2_data_t, event) + name_len);
+
+ return 0;
+}
+
+int event_log_buf_init(uint8_t *event_log_start, uint8_t *event_log_finish)
+{
+ if (event_log_start == NULL || event_log_finish == NULL ||
+ event_log_start > event_log_finish) {
+ return -EINVAL;
+ }
+
+ log_ptr = event_log_start;
+ log_end = (uintptr_t)event_log_finish;
+
+ return 0;
+}
+
+int event_log_init(uint8_t *event_log_start, uint8_t *event_log_finish)
+{
+ return event_log_buf_init(event_log_start, event_log_finish);
+}
+
+int event_log_write_specid_event(void)
+{
+ void *ptr;
+
+ /* event_log_buf_init() must have been called prior to this. */
+ if (log_ptr == NULL) {
+ return -EFAULT;
+ }
+
+ if (((uintptr_t)log_ptr + ID_EVENT_SIZE) > log_end) {
+ return -ENOMEM;
+ }
+
+ ptr = log_ptr;
+
+ /*
+ * Add Specification ID Event first
+ *
+ * Copy TCG_EfiSpecIDEventStruct structure header
+ */
+ (void)memcpy(ptr, (const void *)&id_event_header,
+ sizeof(id_event_header));
+ ptr = (uint8_t *)((uintptr_t)ptr + sizeof(id_event_header));
+
+ /* TCG_EfiSpecIdEventAlgorithmSize structure */
+ ((id_event_algorithm_size_t *)ptr)->algorithm_id = TPM_ALG_ID;
+ ((id_event_algorithm_size_t *)ptr)->digest_size = TCG_DIGEST_SIZE;
+ ptr = (uint8_t *)((uintptr_t)ptr + sizeof(id_event_algorithm_size_t));
+
+ /*
+ * TCG_EfiSpecIDEventStruct.vendorInfoSize
+ * No vendor data
+ */
+ ((id_event_struct_data_t *)ptr)->vendor_info_size = 0;
+ log_ptr = (uint8_t *)((uintptr_t)ptr +
+ offsetof(id_event_struct_data_t, vendor_info));
+
+ return 0;
+}
+
+int event_log_write_header(void)
+{
+ const char locality_signature[] = TCG_STARTUP_LOCALITY_SIGNATURE;
+ void *ptr;
+ int rc;
+
+ rc = event_log_write_specid_event();
+ if (rc < 0) {
+ return rc;
+ }
+
+ if (((uintptr_t)log_ptr + LOC_EVENT_SIZE) > log_end) {
+ return -ENOMEM;
+ }
+
+ ptr = log_ptr;
+
+ /*
+ * The Startup Locality event should be placed in the log before
+ * any event which extends PCR[0].
+ *
+ * Ref. TCG PC Client Platform Firmware Profile 9.4.5.3
+ */
+
+ /* Copy Startup Locality Event Header */
+ (void)memcpy(ptr, (const void *)&locality_event_header,
+ sizeof(locality_event_header));
+ ptr = (uint8_t *)((uintptr_t)ptr + sizeof(locality_event_header));
+
+ /* TCG_PCR_EVENT2.Digests[].AlgorithmId */
+ ((tpmt_ha *)ptr)->algorithm_id = TPM_ALG_ID;
+
+ /* TCG_PCR_EVENT2.Digests[].Digest[] */
+ (void)memset(&((tpmt_ha *)ptr)->digest, 0, TCG_DIGEST_SIZE);
+ ptr = (uint8_t *)((uintptr_t)ptr +
+ offsetof(tpmt_ha, digest) + TCG_DIGEST_SIZE);
+
+ /* TCG_PCR_EVENT2.EventSize */
+ ((event2_data_t *)ptr)->event_size =
+ (uint32_t)sizeof(startup_locality_event_t);
+ ptr = (uint8_t *)((uintptr_t)ptr + offsetof(event2_data_t, event));
+
+ /* TCG_EfiStartupLocalityEvent.Signature */
+ (void)memcpy(ptr, (const void *)locality_signature,
+ sizeof(TCG_STARTUP_LOCALITY_SIGNATURE));
+
+ /*
+ * TCG_EfiStartupLocalityEvent.StartupLocality = 0:
+ * the platform's boot firmware
+ */
+ ((startup_locality_event_t *)ptr)->startup_locality = 0U;
+ log_ptr = (uint8_t *)((uintptr_t)ptr + sizeof(startup_locality_event_t));
+
+ return 0;
+}
+
+int event_log_measure(uintptr_t data_base, uint32_t data_size,
+ unsigned char hash_data[CRYPTO_MD_MAX_SIZE])
+{
+ /* Calculate hash */
+ return crypto_mod_calc_hash(CRYPTO_MD_ID,
+ (void *)data_base, data_size, hash_data);
+}
+
+int event_log_measure_and_record(uintptr_t data_base, uint32_t data_size,
+ uint32_t data_id,
+ const event_log_metadata_t *metadata_ptr)
+{
+ unsigned char hash_data[CRYPTO_MD_MAX_SIZE];
+ int rc;
+
+ if (metadata_ptr == NULL) {
+ return -EINVAL;
+ }
+
+ /* Get the metadata associated with this image. */
+ while (metadata_ptr->id != data_id) {
+ if (metadata_ptr->id == EVLOG_INVALID_ID) {
+ return -EINVAL;
+ }
+
+ metadata_ptr++;
+ }
+
+ /* Measure the payload with algorithm selected by EventLog driver */
+ rc = event_log_measure(data_base, data_size, hash_data);
+ if (rc != 0) {
+ return rc;
+ }
+
+ rc = event_log_record(hash_data, EV_POST_CODE, metadata_ptr);
+ if (rc != 0) {
+ return rc;
+ }
+
+ return 0;
+}
+
+size_t event_log_get_cur_size(uint8_t *event_log_start)
+{
+ assert(event_log_start != NULL);
+ assert(log_ptr >= event_log_start);
+
+ return (size_t)((uintptr_t)log_ptr - (uintptr_t)event_log_start);
+}
diff --git a/lib/event_log/event_log.mk b/lib/event_log/event_log.mk
index 5e41158..df55c62 100644
--- a/lib/event_log/event_log.mk
+++ b/lib/event_log/event_log.mk
@@ -4,9 +4,51 @@
# SPDX-License-Identifier: BSD-3-Clause
#
-# Path to Event Log Library (LibEventLog)
-LIBEVLOG_PATH ?= contrib/libeventlog
+# Path to library sources
+EVENT_LOG_SRC_DIR := lib/event_log/
-INCLUDES += -I$(LIBEVLOG_PATH)/include
+# Default log level to dump the event log (LOG_LEVEL_INFO)
+EVENT_LOG_LEVEL ?= 40
-LIBEVLOG_SOURCES += ${LIBEVLOG_PATH}/src/event_print.c
+EVENT_LOG_SOURCES := ${EVENT_LOG_SRC_DIR}event_print.c
+
+INCLUDES += -Iinclude/lib/event_log \
+ -Iinclude/drivers/auth
+
+ifdef CRYPTO_SUPPORT
+# Measured Boot hash algorithm.
+# SHA-256 (or stronger) is required for all devices that are TPM 2.0 compliant.
+ifdef TPM_HASH_ALG
+ $(warning "TPM_HASH_ALG is deprecated. Please use MBOOT_EL_HASH_ALG instead.")
+ MBOOT_EL_HASH_ALG := ${TPM_HASH_ALG}
+else
+ MBOOT_EL_HASH_ALG := sha256
+endif
+
+ifeq (${MBOOT_EL_HASH_ALG}, sha512)
+ TPM_ALG_ID := TPM_ALG_SHA512
+ TCG_DIGEST_SIZE := 64U
+else ifeq (${MBOOT_EL_HASH_ALG}, sha384)
+ TPM_ALG_ID := TPM_ALG_SHA384
+ TCG_DIGEST_SIZE := 48U
+else
+ TPM_ALG_ID := TPM_ALG_SHA256
+ TCG_DIGEST_SIZE := 32U
+endif #MBOOT_EL_HASH_ALG
+
+# Set definitions for event log library.
+$(eval $(call add_define,TFTF_DEFINES,TPM_ALG_ID))
+$(eval $(call add_define,TFTF_DEFINES,EVENT_LOG_LEVEL))
+$(eval $(call add_define,TFTF_DEFINES,TCG_DIGEST_SIZE))
+
+EVENT_LOG_SOURCES := ${EVENT_LOG_SRC_DIR}event_log.c
+
+INCLUDES += -Iinclude/lib/event_log \
+ -Iinclude/drivers/auth
+
+ifeq (${TRANSFER_LIST}, 1)
+EVENT_LOG_SOURCES += ${EVENT_LOG_SRC_DIR}/event_handoff.c
+INCLUDES += -Iinclude/lib
+endif
+
+endif
diff --git a/lib/event_log/event_print.c b/lib/event_log/event_print.c
new file mode 100644
index 0000000..234a694
--- /dev/null
+++ b/lib/event_log/event_print.c
@@ -0,0 +1,308 @@
+/*
+ * Copyright (c) 2020-2025, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <common/debug.h>
+#include "event_log.h"
+
+/**
+ * Print a TCG_EfiSpecIDEventStruct entry from the event log.
+ *
+ * This function extracts and prints a TCG_EfiSpecIDEventStruct
+ * entry from the event log for debugging or auditing purposes.
+ *
+ * @param[in,out] log_addr Pointer to the current position in the Event Log.
+ * Updated to the next entry after processing.
+ * @param[in,out] log_size Pointer to the remaining Event Log size.
+ * Updated to reflect the remaining bytes.
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+static int event_log_print_id_event(uint8_t **log_addr, size_t *log_size)
+{
+ unsigned int i;
+ uint8_t info_size, *info_size_ptr;
+ void *ptr = *log_addr;
+ id_event_headers_t *event = (id_event_headers_t *)ptr;
+ id_event_algorithm_size_t *alg_ptr;
+ uint32_t event_size, number_of_algorithms;
+ size_t digest_len;
+ const uint8_t *end_ptr = (uint8_t *)((uintptr_t)*log_addr + *log_size);
+
+ if (*log_size < sizeof(id_event_headers_t)) {
+ return -EINVAL;
+ }
+
+ /* The fields of the event log header are defined to be PCRIndex of 0,
+ * EventType of EV_NO_ACTION, Digest of 20 bytes of 0, and
+ * Event content defined as TCG_EfiSpecIDEventStruct.
+ */
+ LOG_EVENT("TCG_EfiSpecIDEvent:\n");
+ LOG_EVENT(" PCRIndex : %u\n", event->header.pcr_index);
+ if (event->header.pcr_index != (uint32_t)PCR_0) {
+ return -EINVAL;
+ }
+
+ LOG_EVENT(" EventType : %u\n", event->header.event_type);
+ if (event->header.event_type != EV_NO_ACTION) {
+ return -EINVAL;
+ }
+
+ LOG_EVENT(" Digest :");
+ for (i = 0U; i < sizeof(event->header.digest); ++i) {
+ uint8_t val = event->header.digest[i];
+
+ (void)printf(" %02x", val);
+ if ((i & U(0xF)) == 0U) {
+ (void)printf("\n");
+ LOG_EVENT("\t\t :");
+ }
+ }
+
+ if ((i & U(0xF)) != 0U) {
+ (void)printf("\n");
+ }
+
+ /* EventSize */
+ event_size = event->header.event_size;
+ LOG_EVENT(" EventSize : %u\n", event_size);
+
+ LOG_EVENT(" Signature : %s\n",
+ event->struct_header.signature);
+ LOG_EVENT(" PlatformClass : %u\n",
+ event->struct_header.platform_class);
+ LOG_EVENT(" SpecVersion : %u.%u.%u\n",
+ event->struct_header.spec_version_major,
+ event->struct_header.spec_version_minor,
+ event->struct_header.spec_errata);
+ LOG_EVENT(" UintnSize : %u\n",
+ event->struct_header.uintn_size);
+
+ /* NumberOfAlgorithms */
+ number_of_algorithms = event->struct_header.number_of_algorithms;
+ LOG_EVENT(" NumberOfAlgorithms : %u\n", number_of_algorithms);
+
+ /* Address of DigestSizes[] */
+ alg_ptr = event->struct_header.digest_size;
+
+ /* Size of DigestSizes[] */
+ digest_len = number_of_algorithms * sizeof(id_event_algorithm_size_t);
+ if (digest_len > (uintptr_t)end_ptr - (uintptr_t)alg_ptr) {
+ return -EFAULT;
+ }
+
+ LOG_EVENT(" DigestSizes :\n");
+ for (i = 0U; i < number_of_algorithms; ++i) {
+ LOG_EVENT(" #%u AlgorithmId : SHA", i);
+ uint16_t algorithm_id = alg_ptr[i].algorithm_id;
+
+ switch (algorithm_id) {
+ case TPM_ALG_SHA256:
+ (void)printf("256\n");
+ break;
+ case TPM_ALG_SHA384:
+ (void)printf("384\n");
+ break;
+ case TPM_ALG_SHA512:
+ (void)printf("512\n");
+ break;
+ default:
+ (void)printf("?\n");
+ ERROR("Algorithm 0x%x not found\n", algorithm_id);
+ return -ENOENT;
+ }
+
+ LOG_EVENT(" DigestSize : %u\n",
+ alg_ptr[i].digest_size);
+ }
+
+ /* Address of VendorInfoSize */
+ info_size_ptr = (uint8_t *)((uintptr_t)alg_ptr + digest_len);
+ if ((uintptr_t)info_size_ptr > (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ info_size = *info_size_ptr++;
+ LOG_EVENT(" VendorInfoSize : %u\n", info_size);
+
+ /* Check VendorInfo end address */
+ if (((uintptr_t)info_size_ptr + info_size) > (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ /* Check EventSize */
+ if (event_size !=
+ (sizeof(id_event_struct_t) + digest_len + info_size)) {
+ return -EFAULT;
+ }
+
+ if (info_size != 0U) {
+ LOG_EVENT(" VendorInfo :");
+ for (i = 0U; i < info_size; ++i) {
+ (void)printf(" %02x", *info_size_ptr++);
+ }
+ (void)printf("\n");
+ }
+
+ *log_size -= (uintptr_t)info_size_ptr - (uintptr_t)*log_addr;
+ *log_addr = info_size_ptr;
+
+ return 0;
+}
+
+/**
+ * Print a TCG_PCR_EVENT2 entry from the event log.
+ *
+ * This function extracts and prints a TCG_PCR_EVENT2 structure
+ * from the event log for debugging or auditing purposes.
+ *
+ * @param[in,out] log_addr Pointer to the current position in the Event Log.
+ * Updated to the next entry after processing.
+ * @param[in,out] log_size Pointer to the remaining Event Log size.
+ * Updated to reflect the remaining bytes.
+ *
+ * @return 0 on success, or a negative error code on failure.
+ */
+static int event_log_print_pcr_event2(uint8_t **log_addr, size_t *log_size)
+{
+ uint32_t event_size, count;
+ size_t sha_size, digests_size = 0U;
+ void *ptr = *log_addr;
+ const uint8_t *end_ptr = (uint8_t *)((uintptr_t)*log_addr + *log_size);
+
+ if (*log_size < sizeof(event2_header_t)) {
+ return -EINVAL;
+ }
+
+ LOG_EVENT("PCR_Event2:\n");
+ LOG_EVENT(" PCRIndex : %u\n",
+ ((event2_header_t *)ptr)->pcr_index);
+ LOG_EVENT(" EventType : %u\n",
+ ((event2_header_t *)ptr)->event_type);
+
+ count = ((event2_header_t *)ptr)->digests.count;
+ if (count < 1U) {
+ LOG_EVENT("Invalid Digests Count : %u\n", count);
+ return -EINVAL;
+ }
+
+ LOG_EVENT(" Digests Count : %u\n", count);
+
+ /* Address of TCG_PCR_EVENT2.Digests[] */
+ ptr = (uint8_t *)ptr + sizeof(event2_header_t);
+ if ((uintptr_t)ptr > (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ for (unsigned int i = 0U; i < count; ++i) {
+ /* Check AlgorithmId address */
+ if (((uintptr_t)ptr + offsetof(tpmt_ha, digest)) >
+ (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ LOG_EVENT(" #%u AlgorithmId : SHA", i);
+ switch (((tpmt_ha *)ptr)->algorithm_id) {
+ case TPM_ALG_SHA256:
+ sha_size = SHA256_DIGEST_SIZE;
+ (void)printf("256\n");
+ break;
+ case TPM_ALG_SHA384:
+ sha_size = SHA384_DIGEST_SIZE;
+ (void)printf("384\n");
+ break;
+ case TPM_ALG_SHA512:
+ sha_size = SHA512_DIGEST_SIZE;
+ (void)printf("512\n");
+ break;
+ default:
+ (void)printf("?\n");
+ printf("Algorithm 0x%x not found\n",
+ ((tpmt_ha *)ptr)->algorithm_id);
+ return -ENOENT;
+ }
+
+ /* End of Digest[] */
+ ptr = (uint8_t *)((uintptr_t)ptr + offsetof(tpmt_ha, digest));
+ if (((uintptr_t)ptr + sha_size) > (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ /* Total size of all digests */
+ digests_size += sha_size;
+
+ LOG_EVENT(" Digest :");
+ for (unsigned int j = 0U; j < sha_size; ++j) {
+ (void)printf(" %02x", *(uint8_t *)ptr++);
+ if ((j & U(0xF)) == U(0xF)) {
+ (void)printf("\n");
+ if (j < (sha_size - 1U)) {
+ LOG_EVENT("\t\t :");
+ }
+ }
+ }
+ }
+
+ /* TCG_PCR_EVENT2.EventSize */
+ if (((uintptr_t)ptr + offsetof(event2_data_t, event)) >
+ (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ event_size = ((event2_data_t *)ptr)->event_size;
+ LOG_EVENT(" EventSize : %u\n", event_size);
+
+ /* Address of TCG_PCR_EVENT2.Event[EventSize] */
+ ptr = (uint8_t *)((uintptr_t)ptr + offsetof(event2_data_t, event));
+
+ /* End of TCG_PCR_EVENT2.Event[EventSize] */
+ if (((uintptr_t)ptr + event_size) > (uintptr_t)end_ptr) {
+ return -EFAULT;
+ }
+
+ if ((event_size == sizeof(startup_locality_event_t)) &&
+ (strcmp((const char *)ptr, TCG_STARTUP_LOCALITY_SIGNATURE) == 0)) {
+ LOG_EVENT(" Signature : %s\n",
+ ((startup_locality_event_t *)ptr)->signature);
+ LOG_EVENT(" StartupLocality : %u\n",
+ ((startup_locality_event_t *)ptr)->startup_locality);
+ } else {
+ LOG_EVENT(" Event : %s\n", (uint8_t *)ptr);
+ }
+
+ *log_size -= (uintptr_t)ptr + event_size - (uintptr_t)*log_addr;
+ *log_addr = (uint8_t *)ptr + event_size;
+
+ return 0;
+}
+
+int event_log_dump(uint8_t *log_addr, size_t log_size)
+{
+ int rc;
+
+ if (log_addr == NULL) {
+ return -EINVAL;
+ }
+
+ /* Print TCG_EfiSpecIDEvent */
+ rc = event_log_print_id_event(&log_addr, &log_size);
+
+ if (rc < 0) {
+ return rc;
+ }
+
+ while (log_size != 0U) {
+ rc = event_log_print_pcr_event2(&log_addr, &log_size);
+ if (rc < 0) {
+ return rc;
+ }
+ }
+ return 0;
+}