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https://github.com/AsahiLinux/u-boot
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aa2d3945ce
Measures the DTB passed to the EFI application upon new boolean config switch CONFIG_EFI_TCG2_PROTOCOL_MEASURE_DTB. For platforms where the content of the DTB passed to the OS can change across reboots, there is not point measuring it hence the config switch to allow platform to not embed this feature. Co-developed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org> Tested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
271 lines
8.7 KiB
C
271 lines
8.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Defines data structures and APIs that allow an OS to interact with UEFI
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* firmware to query information about the device
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*
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* This file refers the following TCG specification.
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* - TCG PC Client Platform Firmware Profile Specification
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* https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/
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*
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* - TCG EFI Protocol Specification
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* https://trustedcomputinggroup.org/resource/tcg-efi-protocol-specification/
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*
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* Copyright (c) 2020, Linaro Limited
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*/
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#if !defined _EFI_TCG2_PROTOCOL_H_
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#define _EFI_TCG2_PROTOCOL_H_
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#include <efi_api.h>
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#include <tpm-v2.h>
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/* TPMV2 only */
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#define TCG2_EVENT_LOG_FORMAT_TCG_2 0x00000002
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#define EFI_TCG2_EXTEND_ONLY 0x0000000000000001
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#define PE_COFF_IMAGE 0x0000000000000010
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#define EFI_TCG2_MAX_PCR_INDEX 23
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/* Algorithm Registry */
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#define EFI_TCG2_BOOT_HASH_ALG_SHA1 0x00000001
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#define EFI_TCG2_BOOT_HASH_ALG_SHA256 0x00000002
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#define EFI_TCG2_BOOT_HASH_ALG_SHA384 0x00000004
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#define EFI_TCG2_BOOT_HASH_ALG_SHA512 0x00000008
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#define EFI_TCG2_BOOT_HASH_ALG_SM3_256 0x00000010
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#define EFI_TCG2_FINAL_EVENTS_TABLE_VERSION 1
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#define TPM2_EVENT_LOG_SIZE CONFIG_EFI_TCG2_PROTOCOL_EVENTLOG_SIZE
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typedef u32 efi_tcg_event_log_bitmap;
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typedef u32 efi_tcg_event_log_format;
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typedef u32 efi_tcg_event_algorithm_bitmap;
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/**
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* struct tdEFI_TCG2_VERSION - structure of EFI TCG2 version
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* @major: major version
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* @minor: minor version
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*/
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struct efi_tcg2_version {
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u8 major;
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u8 minor;
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};
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/**
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* struct tdEFI_TCG2_EVENT_HEADER - structure of EFI TCG2 event header
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* @header_size: size of the event header
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* @header_version: header version
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* @pcr_index: index of the PCR that is extended
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* @event_type: type of the event that is extended
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*/
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struct efi_tcg2_event_header {
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u32 header_size;
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u16 header_version;
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u32 pcr_index;
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u32 event_type;
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} __packed;
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/**
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* struct tdEFI_TCG2_EVENT - structure of EFI TCG2 event
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* @size: total size of the event including the size component, the header
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* and the event data
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* @header: event header
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* @event: event to add
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*/
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struct efi_tcg2_event {
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u32 size;
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struct efi_tcg2_event_header header;
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u8 event[];
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} __packed;
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/**
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* struct tdUEFI_IMAGE_LOAD_EVENT - structure of PE/COFF image measurement
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* @image_location_in_memory: image address
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* @image_length_in_memory: image size
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* @image_link_time_address: image link time address
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* @length_of_device_path: devive path size
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* @device_path: device path
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*/
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struct uefi_image_load_event {
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efi_physical_addr_t image_location_in_memory;
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u64 image_length_in_memory;
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u64 image_link_time_address;
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u64 length_of_device_path;
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struct efi_device_path device_path[];
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};
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/**
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* struct tdEFI_TCG2_BOOT_SERVICE_CAPABILITY - protocol capability information
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* @size: allocated size of the structure
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* @structure_version: version of this structure
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* @protocol_version: version of the EFI TCG2 protocol.
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* @hash_algorithm_bitmap: supported hash algorithms
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* @supported_event_logs: bitmap of supported event log formats
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* @tpm_present_flag: false = TPM not present
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* @max_command_size: max size (in bytes) of a command
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* that can be sent to the TPM
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* @max_response_size: max size (in bytes) of a response that
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* can be provided by the TPM
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* @manufacturer_id: 4-byte Vendor ID
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* @number_of_pcr_banks: maximum number of PCR banks
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* @active_pcr_banks: bitmap of currently active
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* PCR banks (hashing algorithms).
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*/
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struct efi_tcg2_boot_service_capability {
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u8 size;
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struct efi_tcg2_version structure_version;
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struct efi_tcg2_version protocol_version;
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efi_tcg_event_algorithm_bitmap hash_algorithm_bitmap;
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efi_tcg_event_log_bitmap supported_event_logs;
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u8 tpm_present_flag;
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u16 max_command_size;
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u16 max_response_size;
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u32 manufacturer_id;
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u32 number_of_pcr_banks;
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efi_tcg_event_algorithm_bitmap active_pcr_banks;
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};
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/* up to and including the vendor ID (manufacturer_id) field */
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#define BOOT_SERVICE_CAPABILITY_MIN \
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offsetof(struct efi_tcg2_boot_service_capability, number_of_pcr_banks)
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#define TCG_EFI_SPEC_ID_EVENT_SIGNATURE_03 "Spec ID Event03"
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#define TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MAJOR_TPM2 2
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#define TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_MINOR_TPM2 0
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#define TCG_EFI_SPEC_ID_EVENT_SPEC_VERSION_ERRATA_TPM2 2
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/**
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* struct TCG_EfiSpecIdEventAlgorithmSize - hashing algorithm information
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*
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* @algorithm_id: algorithm defined in enum tpm2_algorithms
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* @digest_size: size of the algorithm
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*/
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struct tcg_efi_spec_id_event_algorithm_size {
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u16 algorithm_id;
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u16 digest_size;
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} __packed;
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/**
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* struct TCG_EfiSpecIDEventStruct - content of the event log header
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*
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* @signature: signature, set to Spec ID Event03
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* @platform_class: class defined in TCG ACPI Specification
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* Client Common Header.
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* @spec_version_minor: minor version
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* @spec_version_major: major version
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* @spec_version_errata: major version
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* @uintn_size: size of the efi_uintn_t fields used in various
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* data structures used in this specification.
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* 0x01 indicates u32 and 0x02 indicates u64
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* @number_of_algorithms: hashing algorithms used in this event log
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* @digest_sizes: array of number_of_algorithms pairs
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* 1st member defines the algorithm id
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* 2nd member defines the algorithm size
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*/
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struct tcg_efi_spec_id_event {
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u8 signature[16];
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u32 platform_class;
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u8 spec_version_minor;
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u8 spec_version_major;
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u8 spec_errata;
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u8 uintn_size;
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u32 number_of_algorithms;
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struct tcg_efi_spec_id_event_algorithm_size digest_sizes[];
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} __packed;
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/**
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* struct tdEFI_TCG2_FINAL_EVENTS_TABLE - log entries after Get Event Log
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* @version: version number for this structure
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* @number_of_events: number of events recorded after invocation of
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* GetEventLog()
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* @event: List of events of type tcg_pcr_event2
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*/
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struct efi_tcg2_final_events_table {
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u64 version;
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u64 number_of_events;
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struct tcg_pcr_event2 event[];
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};
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/**
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* struct tdUEFI_VARIABLE_DATA - event log structure of UEFI variable
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* @variable_name: The vendorGUID parameter in the
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* GetVariable() API.
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* @unicode_name_length: The length in CHAR16 of the Unicode name of
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* the variable.
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* @variable_data_length: The size of the variable data.
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* @unicode_name: The CHAR16 unicode name of the variable
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* without NULL-terminator.
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* @variable_data: The data parameter of the efi variable
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* in the GetVariable() API.
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*/
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struct efi_tcg2_uefi_variable_data {
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efi_guid_t variable_name;
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u64 unicode_name_length;
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u64 variable_data_length;
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u16 unicode_name[1];
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u8 variable_data[1];
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};
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/**
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* struct tdUEFI_HANDOFF_TABLE_POINTERS2 - event log structure of SMBOIS tables
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* @table_description_size: size of table description
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* @table_description: table description
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* @number_of_tables: number of uefi configuration table
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* @table_entry: uefi configuration table entry
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*/
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#define SMBIOS_HANDOFF_TABLE_DESC "SmbiosTable"
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struct smbios_handoff_table_pointers2 {
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u8 table_description_size;
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u8 table_description[sizeof(SMBIOS_HANDOFF_TABLE_DESC)];
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u64 number_of_tables;
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struct efi_configuration_table table_entry[];
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} __packed;
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/**
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* struct tdUEFI_GPT_DATA - event log structure of industry standard tables
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* @uefi_partition_header: gpt partition header
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* @number_of_partitions: the number of partition
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* @partitions: partition entries
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*/
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struct efi_gpt_data {
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gpt_header uefi_partition_header;
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u64 number_of_partitions;
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gpt_entry partitions[];
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} __packed;
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/**
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* struct tdUEFI_PLATFORM_FIRMWARE_BLOB2
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* @blob_description_size: Byte size of @data
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* @data: Description data
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*/
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struct uefi_platform_firmware_blob2 {
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u8 blob_description_size;
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u8 data[];
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} __packed;
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struct efi_tcg2_protocol {
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efi_status_t (EFIAPI * get_capability)(struct efi_tcg2_protocol *this,
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struct efi_tcg2_boot_service_capability *capability);
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efi_status_t (EFIAPI * get_eventlog)(struct efi_tcg2_protocol *this,
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efi_tcg_event_log_format log_format,
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u64 *event_log_location, u64 *event_log_last_entry,
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bool *event_log_truncated);
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efi_status_t (EFIAPI * hash_log_extend_event)(struct efi_tcg2_protocol *this,
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u64 flags,
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efi_physical_addr_t data_to_hash,
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u64 data_to_hash_len,
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struct efi_tcg2_event *efi_tcg_event);
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efi_status_t (EFIAPI * submit_command)(struct efi_tcg2_protocol *this,
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u32 input_parameter_block_size,
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u8 *input_parameter_block,
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u32 output_parameter_block_size,
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u8 *output_parameter_block);
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efi_status_t (EFIAPI * get_active_pcr_banks)(struct efi_tcg2_protocol *this,
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u32 *active_pcr_banks);
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efi_status_t (EFIAPI * set_active_pcr_banks)(struct efi_tcg2_protocol *this,
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u32 active_pcr_banks);
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efi_status_t (EFIAPI * get_result_of_set_active_pcr_banks)(struct efi_tcg2_protocol *this,
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u32 *operation_present,
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u32 *response);
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};
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#endif
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