vendorcode/eltan/security/mboot: Add measured boot support

Create measured boot.
This feature uses the vendorcode/eltan/security/lib.
Measure boot can work with and without Verified boot enabled.

The function mb_measure() is starting point for the support. This
function will be called by the common Verified boot code.

BUG=N/A
TEST=Created binary and verify logging on Facebook FBG-1701

Change-Id: I7f880a17e240515dd42d57383b5ddddf576985b0
Signed-off-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30833
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

5 files changed, 771 insertions, 0 deletions

diff --git a/src/vendorcode/eltan/security/mboot/Kconfig b/src/vendorcode/eltan/security/mboot/Kconfig
new file mode 100644
index 0000000000..c4e8dbabee
--- /dev/null
+++ b/src/vendorcode/eltan/security/mboot/Kconfig
@@ -0,0 +1,28 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2018-2019 Eltan B.V.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+menu "Measured Boot (mboot)"
+
+config VENDORCODE_ELTAN_MBOOT
+	bool "Measure firmware with mboot."
+	default n
+	help
+	  Enabling MBOOT will use mboot to measure the components of the firmware
+	  (stages, payload, etc).
+
+config VENDORCODE_ELTAN_CRTM_VERSION_STRING
+	string "default CRTM version"
+	default "default CRTM version"
+
+endmenu # Measured Boot (mboot)
diff --git a/src/vendorcode/eltan/security/mboot/Makefile.inc b/src/vendorcode/eltan/security/mboot/Makefile.inc
new file mode 100644
index 0000000000..68b38586b1
--- /dev/null
+++ b/src/vendorcode/eltan/security/mboot/Makefile.inc
@@ -0,0 +1,29 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2018-2019 Eltan B.V.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+ifneq ($(filter y,$(CONFIG_VENDORCODE_ELTAN_VBOOT) $(CONFIG_VENDORCODE_ELTAN_MBOOT)),)
+CPPFLAGS_common += -I$(src)/security/mboot
+endif
+
+ifeq ($(CONFIG_VENDORCODE_ELTAN_MBOOT),y)
+postcar-y += mboot.c
+
+ramstage-y += mboot.c
+ramstage-y += mboot_func.c
+
+romstage-y += mboot.c
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)
+
+endif # CONFIG_VENDORCODE_ELTAN_VBOOT or CONFIG_VENDORCODE_ELTAN_MBOOT
diff --git a/src/vendorcode/eltan/security/mboot/mboot.c b/src/vendorcode/eltan/security/mboot/mboot.c
new file mode 100644
index 0000000000..5774429329
--- /dev/null
+++ b/src/vendorcode/eltan/security/mboot/mboot.c
@@ -0,0 +1,555 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2018-2019 Eltan B.V.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <mboot.h>
+#include <assert.h>
+#include <build.h>
+#include <vb2_api.h>
+#include <board_mboot.h>
+
+/*
+ * Get the list of currently active PCR banks in TPM.
+ *
+ * @retval A map of active PCR banks.
+ */
+EFI_TCG2_EVENT_ALGORITHM_BITMAP tpm2_get_active_pcrs(void)
+{
+	int status;
+	TPML_PCR_SELECTION Pcrs;
+	EFI_TCG2_EVENT_ALGORITHM_BITMAP tpmHashAlgorithmBitmap = 0;
+	uint32_t activePcrBanks = 0;
+	uint32_t index;
+
+	status = tpm2_get_capability_pcrs(&Pcrs);
+	if (status != TPM_SUCCESS) {
+		tpmHashAlgorithmBitmap = EFI_TCG2_BOOT_HASH_ALG_SHA1;
+		activePcrBanks = EFI_TCG2_BOOT_HASH_ALG_SHA1;
+	} else {
+		for (index = 0; index < Pcrs.count; index++) {
+			switch (Pcrs.pcrSelections[index].hash) {
+			case TPM_ALG_SHA1:
+				tpmHashAlgorithmBitmap |=
+					EFI_TCG2_BOOT_HASH_ALG_SHA1;
+				if (!is_zero_buffer(Pcrs.pcrSelections[index].pcrSelect,
+				  Pcrs.pcrSelections[index].sizeofSelect))
+					activePcrBanks |=
+						 EFI_TCG2_BOOT_HASH_ALG_SHA1;
+				break;
+			case TPM_ALG_SHA256:
+				tpmHashAlgorithmBitmap |=
+					EFI_TCG2_BOOT_HASH_ALG_SHA256;
+				if (!is_zero_buffer(Pcrs.pcrSelections[index].pcrSelect,
+				  Pcrs.pcrSelections[index].sizeofSelect))
+					activePcrBanks |=
+						EFI_TCG2_BOOT_HASH_ALG_SHA256;
+				break;
+			case TPM_ALG_SHA384:
+			case TPM_ALG_SHA512:
+			case TPM_ALG_SM3_256:
+			default:
+				printk(BIOS_DEBUG, "%s: unsupported algorithm "
+					"reported - 0x%x\n", __func__,
+					Pcrs.pcrSelections[index].hash);
+				break;
+			}
+		}
+	}
+	printk(BIOS_DEBUG, "Tcg2 Capability values from TPM\n");
+	printk(BIOS_DEBUG, "tpmHashAlgorithmBitmap - 0x%08x\n",
+		tpmHashAlgorithmBitmap);
+	printk(BIOS_DEBUG, "activePcrBanks         - 0x%08x\n",
+		activePcrBanks);
+
+	return activePcrBanks;
+}
+
+/*
+ * tpm2_get_capability_pcrs
+ *
+ * Return the TPM PCR information.
+ *
+ * This function parses the data got from tlcl_get_capability and returns the
+ * PcrSelection.
+ *
+ * @param[out] Pcrs		The Pcr Selection
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	The command was unsuccessful.
+ */
+int tpm2_get_capability_pcrs(TPML_PCR_SELECTION *Pcrs)
+{
+	TPMS_CAPABILITY_DATA TpmCap;
+	int status;
+	int index;
+
+	status = tlcl_get_capability(TPM_CAP_PCRS, 0, 1, &TpmCap);
+	if (status == TPM_SUCCESS) {
+		Pcrs->count = TpmCap.data.assignedPCR.count;
+		printk(BIOS_DEBUG, "Pcrs->count = %d\n", Pcrs->count);
+		for (index = 0; index < Pcrs->count; index++) {
+			Pcrs->pcrSelections[index].hash =
+				swab16(TpmCap.data.assignedPCR.pcrSelections[index].hash);
+			printk(BIOS_DEBUG, "Pcrs->pcrSelections[index].hash ="
+				"0x%x\n", Pcrs->pcrSelections[index].hash);
+			Pcrs->pcrSelections[index].sizeofSelect =
+				TpmCap.data.assignedPCR.pcrSelections[index].sizeofSelect;
+			memcpy(Pcrs->pcrSelections[index].pcrSelect,
+				TpmCap.data.assignedPCR.pcrSelections[index].pcrSelect,
+				Pcrs->pcrSelections[index].sizeofSelect);
+		}
+	}
+	return status;
+}
+
+/*
+ * mboot_hash_extend_log
+ *
+ * Calculates the hash over the data and extends it in active PCR banks and
+ * then logs them in the event log.
+ *
+ * @param[in] activePcr		bitmap of active PCR banks in TPM.
+ * @param[in] flags		flags associated with hash data. Currently
+ *				unused.
+ * @param[in] hashData		data to be hashed.
+ * @param[in] hashDataLen	length of the data to be hashed.
+ * @param[in] newEventHdr	event header in TCG_PCR_EVENT2 format.
+ * @param[in] eventLog		description of the event.
+ * @param[in] invalid		invalidate the pcr
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+ */
+int mboot_hash_extend_log(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr,
+	uint64_t flags, uint8_t *hashData, uint32_t hashDataLen,
+	TCG_PCR_EVENT2_HDR *newEventHdr, uint8_t *eventLog, uint8_t invalid)
+{
+	int status;
+	TPMT_HA *digest = NULL;
+	int digest_num = 0;
+
+	printk(BIOS_DEBUG, "%s: Hash Data Length: %zu bytes\n", __func__,
+		(size_t)hashDataLen);
+
+	if (invalid) {
+		digest = &(newEventHdr->digest.digests[digest_num]);
+		digest->hashAlg = TPM_ALG_ERROR;
+		digest_num++;
+	} else {
+		/*
+		 * Generate SHA1 hash if SHA1 PCR bank is active in TPM
+		 * currently
+		 */
+		if (activePcr & EFI_TCG2_BOOT_HASH_ALG_SHA1) {
+			digest = &(newEventHdr->digest.digests[digest_num]);
+			if (flags & MBOOT_HASH_PROVIDED) {
+				/* The hash is provided as data */
+				memcpy(digest->digest.sha1, (void *)hashData,
+					VB2_SHA1_DIGEST_SIZE);
+			} else {
+				status = cb_sha_endian(VB2_HASH_SHA1, hashData,
+						       hashDataLen,
+						       digest->digest.sha1,
+						       NO_ENDIAN_ALGORITHM);
+				if ( status )
+					return TPM_E_IOERROR;
+			}
+
+			digest->hashAlg = TPM_ALG_SHA1;
+			digest_num++;
+
+			printk(BIOS_DEBUG, "%s: SHA1 Hash Digest:\n", __func__);
+			mboot_print_buffer(digest->digest.sha1,
+				VB2_SHA1_DIGEST_SIZE);
+		}
+
+		/*
+		 * Generate SHA256 hash if SHA256 PCR bank is active in TPM
+		 * currently
+		 */
+		if (activePcr & EFI_TCG2_BOOT_HASH_ALG_SHA256) {
+			digest = &(newEventHdr->digest.digests[digest_num]);
+			if (flags & MBOOT_HASH_PROVIDED) {
+				/* The hash is provided as data */
+				memcpy(digest->digest.sha256,
+					(void *)hashData, hashDataLen);
+			} else {
+				status = cb_sha_endian(VB2_HASH_SHA256, hashData,
+						       hashDataLen,
+						       digest->digest.sha256,
+						       LITTLE_ENDIAN_ALGORITHM);
+				if (status)
+					return TPM_E_IOERROR;
+			}
+			digest->hashAlg = TPM_ALG_SHA256;
+			digest_num++;
+
+			printk(BIOS_DEBUG, "%s: SHA256 Hash Digest:\n",
+				__func__);
+			mboot_print_buffer(digest->digest.sha256,
+				VB2_SHA256_DIGEST_SIZE);
+		}
+	}
+
+	newEventHdr->digest.count = digest_num;
+
+	status = tlcl_extend(newEventHdr->pcrIndex, (uint8_t *)&(newEventHdr->digest),
+			NULL);
+	if (status != TPM_SUCCESS)
+		printk(BIOS_DEBUG, "%s: returned 0x%x\n", __func__, status);
+
+	return status;
+}
+
+/*
+ * invalidate_pcrs
+ *
+ * Invalidate PCRs 0-7 with extending 1 after tpm failure.
+ */
+void invalidate_pcrs(void)
+{
+	int status, pcr;
+	TCG_PCR_EVENT2_HDR tcgEventHdr;
+	EFI_TCG2_EVENT_ALGORITHM_BITMAP ActivePcrs;
+	uint8_t invalidate;
+
+	ActivePcrs = tpm2_get_active_pcrs();
+	invalidate = 1;
+
+	for (pcr = 0; pcr < 8; pcr++) {
+		printk(BIOS_DEBUG, "%s: Invalidating PCR %d\n", __func__, pcr);
+		memset(&tcgEventHdr, 0, sizeof(tcgEventHdr));
+		tcgEventHdr.pcrIndex  = pcr;
+		tcgEventHdr.eventType = EV_NO_ACTION;
+		tcgEventHdr.eventSize = (uint32_t) sizeof(invalidate);
+
+		status = mboot_hash_extend_log(ActivePcrs, 0,
+			(uint8_t *)&invalidate, tcgEventHdr.eventSize,
+			&tcgEventHdr, (uint8_t *)"Invalidate PCR", invalidate);
+
+		if (status != TPM_SUCCESS)
+			printk(BIOS_DEBUG, "%s: invalidating pcr %d returned"
+				" 0x%x\n", __func__, pcr, status);
+	}
+}
+
+/*
+ * is_zero_buffer
+ *
+ * Check if buffer is all zero.
+ *
+ * @param[in] buffer   Buffer to be checked.
+ * @param[in] size     Size of buffer to be checked.
+ *
+ * @retval TRUE  buffer is all zero.
+ * @retval FALSE buffer is not all zero.
+ */
+int is_zero_buffer(void *buffer, unsigned int size)
+{
+	uint8_t *ptr;
+
+	ptr = buffer;
+	while (size--) {
+		if (*(ptr++) != 0)
+			return false;
+	}
+	return true;
+}
+
+/*
+ * Prints command or response buffer for debugging purposes.
+ *
+ * @param[in] Buffer     Buffer to print.
+ * @param[in] BufferSize Buffer data length.
+ *
+ * @retval  None
+ */
+void mboot_print_buffer(uint8_t *buffer, uint32_t bufferSize)
+{
+	uint32_t index;
+
+	printk(BIOS_DEBUG, "Buffer Address: 0x%08x, Size: 0x%08x, Value:\n",
+		(unsigned int)*buffer, bufferSize);
+	for (index = 0; index < bufferSize; index++) {
+		printk(BIOS_DEBUG, "%02x ", *(buffer + index));
+		if ((index+1) % 16 == 0)
+			printk(BIOS_DEBUG, "\n");
+	}
+	printk(BIOS_DEBUG, "\n");
+}
+
+/*
+ * measures and logs the specified cbfs file.
+ *
+ * @param[in] activePcr		bitmap of active PCR banks in TPM.
+ * @param[in] name		name of the cbfs file to measure
+ * @param[in] type		data type of the cbfs file.
+ * @param[in] pcr		pcr to extend.
+ * @param[in] evenType		tcg event type.
+ * @param[in] event_msg		description of the event.
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+ */
+int mb_measure_log_worker(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr,
+		const char *name, uint32_t type, uint32_t pcr,
+		TCG_EVENTTYPE eventType, const char *event_msg)
+{
+	int status;
+	TCG_PCR_EVENT2_HDR tcgEventHdr;
+	uint8_t *base;
+	size_t size;
+
+	printk(BIOS_DEBUG, "%s: Measure %s\n", __func__, name);
+	base = cbfs_boot_map_with_leak(name, type, &size);
+
+	if (base == NULL) {
+		printk(BIOS_DEBUG, "%s: CBFS locate fail: %s\n", __func__,
+			name);
+		return VB2_ERROR_READ_FILE_OPEN;
+	}
+
+	printk(BIOS_DEBUG, "%s: CBFS locate success: %s\n",
+			__func__, name);
+	memset(&tcgEventHdr, 0, sizeof(tcgEventHdr));
+	tcgEventHdr.pcrIndex  = pcr;
+	tcgEventHdr.eventType = eventType;
+	if (event_msg)
+		tcgEventHdr.eventSize = (uint32_t) strlen(event_msg);
+
+	status = mboot_hash_extend_log(activePcr, 0, base, size, &tcgEventHdr,
+		(uint8_t *)event_msg, 0);
+	return status;
+}
+
+#ifdef __PRE_RAM__
+/*
+ * Called from early romstage
+ *
+ *mb_entry
+ *
+ * initializes measured boot mechanism, initializes the
+ * tpm library and starts the tpm called by mb_measure
+ *
+ * The function can be overridden at the mainboard level my simply creating a
+ * function with the same name there.
+ *
+ * @param[in] wake_from_s3	1 if we are waking from S3, 0 standard boot
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+**/
+
+int __attribute__((weak)) mb_entry(int wake_from_s3)
+{
+	int status;
+
+	/* Initialize TPM driver. */
+	printk(BIOS_DEBUG, "%s: tlcl_lib_init\n", __func__);
+	if (tlcl_lib_init() != VB2_SUCCESS) {
+		printk(BIOS_ERR, "%s: TPM driver initialization failed.\n",
+			__func__);
+		return TPM_E_IOERROR;
+	}
+
+	if (wake_from_s3) {
+		printk(BIOS_DEBUG, "%s: tlcl_resume\n", __func__);
+		status = tlcl_resume();
+	} else {
+		printk(BIOS_DEBUG, "%s: tlcl_startup\n", __func__);
+		status = tlcl_startup();
+	}
+
+	if (status)
+		printk(BIOS_ERR, "%s: StartUp failed 0x%x!\n", __func__,
+			status);
+
+	return status;
+}
+
+/*
+ *
+ * mb_measure
+ *
+ * initial call to the measured boot mechanism, initializes the
+ * tpm library, starts the tpm and performs the measurements defined by
+ * the coreboot platform.
+ *
+ * The pcrs will be invalidated if the measurement fails
+ *
+ * The function can be overridden at the mainboard level my simply creating a
+ * function with the same name there.
+ *
+ * @param[in] wake_from_s3	1 if we are waking from S3, 0 standard boot
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+ */
+
+int __attribute__((weak))mb_measure(int wake_from_s3)
+{
+	uint32_t status;
+
+	status = mb_entry(wake_from_s3);
+	if (status == TPM_SUCCESS) {
+		printk(BIOS_DEBUG, "%s: StartUp, successful!\n", __func__);
+		status = mb_measure_log_start();
+		if (status == TPM_SUCCESS) {
+			printk(BIOS_DEBUG, "%s: Measuring, successful!\n",
+			__func__);
+		} else {
+			invalidate_pcrs();
+			printk(BIOS_ERR, "%s: Measuring returned 0x%x "
+				"unsuccessful! PCRs invalidated.\n",
+				__func__, status);
+		}
+	} else {
+		invalidate_pcrs();
+		printk(BIOS_ERR, "%s: StartUp returned 0x%x, unsuccessful!"
+			"PCRs invalidated.\n", __func__, status);
+	}
+	return status;
+}
+
+/*
+ *
+ * mb_measure_log_start
+ *
+ * performs the measurements defined by the the board routines.
+ *
+ * The logging is defined by the mb_log_list structure
+ *
+ * These items need to be defined in the mainboard part of the mboot
+ * implementation
+ *
+ * The function can be overridden at the mainboard level my simply creating a
+ * function with the same name there.
+ *
+ * @param[in]  none
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+ */
+int __attribute__((weak))mb_measure_log_start(void)
+{
+	int status;
+	EFI_TCG2_EVENT_ALGORITHM_BITMAP ActivePcrs;
+	uint32_t i;
+
+	ActivePcrs = tpm2_get_active_pcrs();
+
+	if (ActivePcrs == 0x0) {
+		printk(BIOS_DEBUG, "%s: No Active PCR Bank in TPM.\n",
+			__func__);
+		return TPM_E_IOERROR;
+	}
+
+	status = mb_crtm(ActivePcrs);
+	if (status != TPM_SUCCESS) {
+		printk(BIOS_DEBUG, "%s: Fail! CRTM Version can't be measured."
+			" ABORTING!!!\n", __func__);
+		return status;
+	}
+	printk(BIOS_DEBUG, "%s: Success! CRTM Version measured.\n", __func__);
+
+	/* Log the items defined by the mainboard */
+	for (i = 0; i < ARRAY_SIZE(mb_log_list); i++) {
+		status = mb_measure_log_worker(
+				ActivePcrs, mb_log_list[i].cbfs_name,
+				mb_log_list[i].cbfs_type, mb_log_list[i].pcr,
+				mb_log_list[i].eventType,
+				mb_log_list[i].event_msg);
+		if (status != TPM_SUCCESS) {
+			printk(BIOS_DEBUG, "%s: Fail! %s can't be measured."
+				"ABORTING!!!\n", __func__,
+				mb_log_list[i].cbfs_name);
+			return status;
+		}
+		printk(BIOS_DEBUG, "%s: Success! %s measured to pcr"
+			"%d.\n", __func__, mb_log_list[i].cbfs_name,
+			mb_log_list[i].pcr);
+	}
+	return status;
+}
+
+static const uint8_t crtm_version[] =
+	CONFIG_VENDORCODE_ELTAN_CRTM_VERSION_STRING\
+	COREBOOT_VERSION COREBOOT_EXTRA_VERSION " " COREBOOT_BUILD;
+
+/*
+ *
+ * mb_crtm
+ *
+ * measures the crtm version. this consists of a string than can be
+ * defined using make menuconfig and automatically generated version
+ * information.
+ *
+ * The function can be overridden at the mainboard level my simply creating a
+ * function with the same name there.
+ *
+ * @param[in] activePcr		bitmap of the support
+ *
+ * @retval TPM_SUCCESS		Operation completed successfully.
+ * @retval TPM_E_IOERROR	Unexpected device behavior.
+**/
+int __attribute__((weak))mb_crtm(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr)
+{
+	int status;
+	TCG_PCR_EVENT2_HDR tcgEventHdr;
+	uint8_t hash[VB2_SHA256_DIGEST_SIZE];
+	uint8_t *msgPtr;
+
+	/* Use FirmwareVersion string to represent CRTM version. */
+	printk(BIOS_DEBUG, "%s: Measure CRTM Version\n", __func__);
+	memset(&tcgEventHdr, 0, sizeof(tcgEventHdr));
+	tcgEventHdr.pcrIndex = MBOOT_PCR_INDEX_0;
+	tcgEventHdr.eventType = EV_S_CRTM_VERSION;
+	tcgEventHdr.eventSize = sizeof(crtm_version);
+	printk(BIOS_DEBUG, "%s: EventSize - %u\n", __func__,
+		tcgEventHdr.eventSize);
+
+	status = mboot_hash_extend_log(activePcr, 0, (uint8_t *)crtm_version,
+		tcgEventHdr.eventSize, &tcgEventHdr, (uint8_t *)crtm_version,
+		0);
+	if (status) {
+		printk(BIOS_DEBUG, "Measure CRTM Version returned 0x%x\n",
+			status);
+		return status;
+	}
+
+	status = get_intel_me_hash(hash);
+	if (status) {
+		printk(BIOS_DEBUG, "get_intel_me_hash returned 0x%x\n", status);
+		status = TPM_E_IOERROR;
+		return status;
+	}
+
+	/* Add the me hash */
+	printk(BIOS_DEBUG, "%s: Add the hash returned by the ME\n",
+		__func__);
+	memset(&tcgEventHdr, 0, sizeof(tcgEventHdr));
+	tcgEventHdr.pcrIndex  = MBOOT_PCR_INDEX_0;
+	tcgEventHdr.eventType = EV_S_CRTM_CONTENTS;
+
+	msgPtr = NULL;
+	tcgEventHdr.eventSize = 0;
+	status = mboot_hash_extend_log(activePcr, MBOOT_HASH_PROVIDED, hash,
+			sizeof(hash), &tcgEventHdr, msgPtr, 0);
+	if (status)
+		printk(BIOS_DEBUG, "Add ME hash returned 0x%x\n", status);
+
+	return status;
+}
+#endif // __PRE_RAM__
diff --git a/src/vendorcode/eltan/security/mboot/mboot.h b/src/vendorcode/eltan/security/mboot/mboot.h
new file mode 100644
index 0000000000..96375aba5b
--- /dev/null
+++ b/src/vendorcode/eltan/security/mboot/mboot.h
@@ -0,0 +1,131 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2018-2019 Eltan B.V.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MBOOT_H
+#define MBOOT_H
+
+#include <arch/io.h>
+#include <arch/acpi.h>
+#include <string.h>
+#include <cb_sha.h>
+#include <console/console.h>
+#include <cbfs.h>
+#include <lib.h>
+#include <boot/coreboot_tables.h>
+#include <security/tpm/tss/tcg-2.0/tss_structures.h>
+#include <security/tpm/tss.h>
+#include <swab.h>
+
+/* TPM2 interface */
+#define EFI_TPM2_ACPI_TABLE_START_METHOD_TIS	6
+#define TPM_SHA1_160_HASH_LEN	0x14
+
+/* Part 2, section 5.4: TPM_DIGEST */
+
+/* Index to a PCR register */
+typedef uint32_t TPM_PCRINDEX;
+typedef uint32_t TCG_EVENTTYPE;
+typedef TPM_PCRINDEX TCG_PCRINDEX;
+typedef int8_t TCG_DIGEST;
+
+/* TCG_PCR_EVENT_HDR */
+typedef struct {
+	TCG_PCRINDEX pcrIndex;
+	TCG_EVENTTYPE eventType;
+	TCG_DIGEST digest[TPM_SHA1_160_HASH_LEN];
+	uint32_t eventSize;
+} __packed TCG_PCR_EVENT_HDR;
+
+/* TCG_PCR_EVENT2_HDR */
+typedef struct {
+	TCG_PCRINDEX pcrIndex;
+	TCG_EVENTTYPE eventType;
+	TPML_DIGEST_VALUES digest;
+	uint32_t eventSize;
+} __packed TCG_PCR_EVENT2_HDR;
+
+typedef uint32_t EFI_TCG2_EVENT_ALGORITHM_BITMAP;
+
+#define EFI_TCG2_BOOT_HASH_ALG_SHA1	0x00000001
+#define EFI_TCG2_BOOT_HASH_ALG_SHA256	0x00000002
+#define EFI_TCG2_BOOT_HASH_ALG_SHA384	0x00000004
+#define EFI_TCG2_BOOT_HASH_ALG_SHA512	0x00000008
+#define EFI_TCG2_BOOT_HASH_ALG_SM3_256	0x00000010
+
+/* Standard event types */
+#define EV_POST_CODE		((TCG_EVENTTYPE) 0x00000001)
+#define EV_NO_ACTION		((TCG_EVENTTYPE) 0x00000003)
+#define EV_SEPARATOR		((TCG_EVENTTYPE) 0x00000004)
+#define EV_S_CRTM_CONTENTS	((TCG_EVENTTYPE) 0x00000007)
+#define EV_S_CRTM_VERSION	((TCG_EVENTTYPE) 0x00000008)
+#define EV_CPU_MICROCODE	((TCG_EVENTTYPE) 0x00000009)
+#define EV_TABLE_OF_DEVICES	((TCG_EVENTTYPE) 0x0000000B)
+
+#define MBOOT_PCR_INDEX_0	0x0
+#define MBOOT_PCR_INDEX_1	0x1
+#define MBOOT_PCR_INDEX_2	0x2
+#define MBOOT_PCR_INDEX_3	0x3
+#define MBOOT_PCR_INDEX_4	0x4
+#define MBOOT_PCR_INDEX_5	0x5
+#define MBOOT_PCR_INDEX_6	0x6
+#define MBOOT_PCR_INDEX_7	0x7
+
+/*
+ * used to indicate a hash is provide so there is no need to perform the
+ * measurement
+ */
+#define MBOOT_HASH_PROVIDED (0x00000001)
+
+
+int is_zero_buffer(void *buffer, unsigned int size);
+
+int mboot_hash_extend_log(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr,
+	uint64_t flags, uint8_t *hashData, uint32_t hashDataLen,
+	TCG_PCR_EVENT2_HDR *newEventHdr, uint8_t *eventLog, uint8_t invalid);
+
+void mboot_print_buffer(uint8_t *buffer, uint32_t bufferSize);
+
+int mb_crtm(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr);
+
+typedef struct {
+	const char *cbfs_name;
+	uint32_t cbfs_type;
+	uint32_t pcr;
+	TCG_EVENTTYPE eventType;
+	const char *event_msg;
+} mboot_measure_item_t;
+
+int mb_measure_log_worker(EFI_TCG2_EVENT_ALGORITHM_BITMAP activePcr,
+		const char *name, uint32_t type, uint32_t pcr,
+		TCG_EVENTTYPE eventType, const char *event_msg);
+
+int mb_measure_log_start(void);
+void invalidate_pcrs(void);
+
+EFI_TCG2_EVENT_ALGORITHM_BITMAP tpm2_get_active_pcrs(void);
+
+int tpm2_get_capability_pcrs(TPML_PCR_SELECTION *Pcrs);
+
+int mb_measure(int wake_from_s3);
+int mb_entry(int wake_from_s3);
+
+int log_efi_specid_event(EFI_TCG2_EVENT_ALGORITHM_BITMAP ActivePcrs);
+int log_event_tcg_20_format(TCG_PCR_EVENT2_HDR *EventHdr, uint8_t *EventLog);
+int log_event_tcg_12_format(TCG_PCR_EVENT2_HDR *EventHdr, uint8_t *EventLog);
+
+int get_intel_me_hash(uint8_t *hash);
+
+#endif /* MBOOT_H */
diff --git a/src/vendorcode/eltan/security/mboot/mboot_func.c b/src/vendorcode/eltan/security/mboot/mboot_func.c
new file mode 100644
index 0000000000..ec66d345d0
--- /dev/null
+++ b/src/vendorcode/eltan/security/mboot/mboot_func.c
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Eltan B.V.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <mboot.h>
+
+int log_efi_specid_event(EFI_TCG2_EVENT_ALGORITHM_BITMAP ActivePcrs) {
+	return TPM_SUCCESS;
+}
+
+int log_event_tcg_12_format(TCG_PCR_EVENT2_HDR *EventHdr, uint8_t *EventLog) {
+	return TPM_SUCCESS;
+}
+
+int log_event_tcg_20_format(TCG_PCR_EVENT2_HDR *EventHdr, uint8_t *EventLog) {
+	return TPM_SUCCESS;
+}