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38040a63a3
We support the TCG2 protocol. Allow command efidebug to print it. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
262 lines
8.5 KiB
C
262 lines
8.5 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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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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