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>
This commit is contained in:
Frans Hendriks
Philipp Deppenwiese
parent
cfe08ff197
commit
7c82dbcc51
|
|
@ -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)
|
||||
|
|
@ -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
|
||||
|
|
@ -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__
|
||||
|
|
@ -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 */
|
||||
|
|
@ -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;
|
||||
}
|
||||
Loading…
Reference in New Issue