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/*
* Copyright (c) 2020-2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef TCG_H
#define TCG_H
#include <stdint.h>
#define TCG_ID_EVENT_SIGNATURE_03 "Spec ID Event03"
#define TCG_STARTUP_LOCALITY_SIGNATURE "StartupLocality"
#define TCG_SPEC_VERSION_MAJOR_TPM2 2
#define TCG_SPEC_VERSION_MINOR_TPM2 0
#define TCG_SPEC_ERRATA_TPM2 2
/*
* Event types
* Ref. Table 9 Events
* TCG PC Client Platform Firmware Profile Specification.
*/
#define EV_PREBOOT_CERT U(0x00000000)
#define EV_POST_CODE U(0x00000001)
#define EV_UNUSED U(0x00000002)
#define EV_NO_ACTION U(0x00000003)
#define EV_SEPARATOR U(0x00000004)
#define EV_ACTION U(0x00000005)
#define EV_EVENT_TAG U(0x00000006)
#define EV_S_CRTM_CONTENTS U(0x00000007)
#define EV_S_CRTM_VERSION U(0x00000008)
#define EV_CPU_MICROCODE U(0x00000009)
#define EV_PLATFORM_CONFIG_FLAGS U(0x0000000A)
#define EV_TABLE_OF_DEVICES U(0x0000000B)
#define EV_COMPACT_HASH U(0x0000000C)
#define EV_IPL U(0x0000000D)
#define EV_IPL_PARTITION_DATA U(0x0000000E)
#define EV_NONHOST_CODE U(0x0000000F)
#define EV_NONHOST_CONFIG U(0x00000010)
#define EV_NONHOST_INFO U(0x00000011)
#define EV_OMIT_BOOT_DEVICE_EVENTS U(0x00000012)
#define EV_EFI_EVENT_BASE U(0x80000000)
#define EV_EFI_VARIABLE_DRIVER_CONFIG U(0x80000001)
#define EV_EFI_VARIABLE_BOOT U(0x80000002)
#define EV_EFI_BOOT_SERVICES_APPLICATION U(0x80000003)
#define EV_EFI_BOOT_SERVICES_DRIVER U(0x80000004)
#define EV_EFI_RUNTIME_SERVICES_DRIVER U(0x80000005)
#define EV_EFI_GPT_EVENT U(0x80000006)
#define EV_EFI_ACTION U(0x80000007)
#define EV_EFI_PLATFORM_FIRMWARE_BLOB U(0x80000008)
#define EV_EFI_HANDOFF_TABLES U(0x80000009)
#define EV_EFI_HCRTM_EVENT U(0x80000010)
#define EV_EFI_VARIABLE_AUTHORITY U(0x800000E0)
/*
* TPM_ALG_ID constants.
* Ref. Table 9 - Definition of (UINT16) TPM_ALG_ID Constants
* Trusted Platform Module Library. Part 2: Structures
*/
#define TPM_ALG_SHA256 0x000B
#define TPM_ALG_SHA384 0x000C
#define TPM_ALG_SHA512 0x000D
/* TCG Platform Type */
#define PLATFORM_CLASS_CLIENT 0
#define PLATFORM_CLASS_SERVER 1
/* SHA digest sizes in bytes */
#define SHA1_DIGEST_SIZE 20
#define SHA256_DIGEST_SIZE 32
#define SHA384_DIGEST_SIZE 48
#define SHA512_DIGEST_SIZE 64
enum {
/*
* SRTM, BIOS, Host Platform Extensions, Embedded
* Option ROMs and PI Drivers
*/
PCR_0 = 0,
/* Host Platform Configuration */
PCR_1,
/* UEFI driver and application Code */
PCR_2,
/* UEFI driver and application Configuration and Data */
PCR_3,
/* UEFI Boot Manager Code (usually the MBR) and Boot Attempts */
PCR_4,
/*
* Boot Manager Code Configuration and Data (for use
* by the Boot Manager Code) and GPT/Partition Table
*/
PCR_5,
/* Host Platform Manufacturer Specific */
PCR_6,
/* Secure Boot Policy */
PCR_7,
/* 8-15: Defined for use by the Static OS */
PCR_8,
/* Debug */
PCR_16 = 16,
/* D-CRTM-measurements by DRTM implementation */
PCR_17 = 17,
/* DCE measurements by DRTM implementation */
PCR_18 = 18
};
#pragma pack(push, 1)
/*
* PCR Event Header
* TCG EFI Protocol Specification
* 5.3 Event Log Header
*/
typedef struct {
/* PCRIndex:
* The PCR Index to which this event is extended
*/
uint32_t pcr_index;
/* EventType:
* SHALL be an EV_NO_ACTION event
*/
uint32_t event_type;
/* SHALL be 20 Bytes of 0x00 */
uint8_t digest[SHA1_DIGEST_SIZE];
/* The size of the event */
uint32_t event_size;
/* SHALL be a TCG_EfiSpecIdEvent */
uint8_t event[]; /* [event_data_size] */
} tcg_pcr_event_t;
/*
* Log Header Entry Data
* Ref. Table 14 TCG_EfiSpecIdEventAlgorithmSize
* TCG PC Client Platform Firmware Profile 9.4.5.1
*/
typedef struct {
/* Algorithm ID (hashAlg) of the Hash used by BIOS */
uint16_t algorithm_id;
/* The size of the digest produced by the implemented Hash algorithm */
uint16_t digest_size;
} id_event_algorithm_size_t;
/*
* TCG_EfiSpecIdEvent structure
* Ref. Table 15 TCG_EfiSpecIdEvent
* TCG PC Client Platform Firmware Profile 9.4.5.1
*/
typedef struct {
/*
* The NUL-terminated ASCII string "Spec ID Event03".
* SHALL be set to {0x53, 0x70, 0x65, 0x63, 0x20, 0x49, 0x44,
* 0x20, 0x45, 0x76, 0x65, 0x6e, 0x74, 0x30, 0x33, 0x00}.
*/
uint8_t signature[16];
/*
* The value for the Platform Class.
* The enumeration is defined in the TCG ACPI Specification Client
* Common Header.
*/
uint32_t platform_class;
/*
* The PC Client Platform Profile Specification minor version number
* this BIOS supports.
* Any BIOS supporting this version (2.0) MUST set this value to 0x00.
*/
uint8_t spec_version_minor;
/*
* The PC Client Platform Profile Specification major version number
* this BIOS supports.
* Any BIOS supporting this version (2.0) MUST set this value to 0x02.
*/
uint8_t spec_version_major;
/*
* The PC Client Platform Profile Specification errata version number
* this BIOS supports.
* Any BIOS supporting this version (2.0) MUST set this value to 0x02.
*/
uint8_t spec_errata;
/*
* Specifies the size of the UINTN fields used in various data
* structures used in this specification.
* 0x01 indicates UINT32 and 0x02 indicates UINT64.
*/
uint8_t uintn_size;
/*
* The number of Hash algorithms in the digestSizes field.
* This field MUST be set to a value of 0x01 or greater.
*/
uint32_t number_of_algorithms;
/*
* Each TCG_EfiSpecIdEventAlgorithmSize SHALL contain an algorithmId
* and digestSize for each hash algorithm used in the TCG_PCR_EVENT2
* structure, the first of which is a Hash algorithmID and the second
* is the size of the respective digest.
*/
id_event_algorithm_size_t digest_size[]; /* number_of_algorithms */
} id_event_struct_header_t;
typedef struct {
/*
* Size in bytes of the VendorInfo field.
* Maximum value MUST be FFh bytes.
*/
uint8_t vendor_info_size;
/*
* Provided for use by Platform Firmware implementer. The value might
* be used, for example, to provide more detailed information about the
* specific BIOS such as BIOS revision numbers, etc. The values within
* this field are not standardized and are implementer-specific.
* Platform-specific or -unique information MUST NOT be provided in
* this field.
*
*/
uint8_t vendor_info[]; /* [vendorInfoSize] */
} id_event_struct_data_t;
typedef struct {
id_event_struct_header_t struct_header;
id_event_struct_data_t struct_data;
} id_event_struct_t;
typedef struct {
tcg_pcr_event_t header;
id_event_struct_header_t struct_header;
} id_event_headers_t;
/* TPMT_HA Structure */
typedef struct {
/* Selector of the hash contained in the digest that implies
* the size of the digest
*/
uint16_t algorithm_id; /* AlgorithmId */
/* Digest, depends on AlgorithmId */
uint8_t digest[]; /* Digest[] */
} tpmt_ha;
/*
* TPML_DIGEST_VALUES Structure
*/
typedef struct {
/* The number of digests in the list */
uint32_t count; /* Count */
/* The list of tagged digests, as sent to the TPM as part of a
* TPM2_PCR_Extend or as received from a TPM2_PCR_Event command
*/
tpmt_ha digests[]; /* Digests[Count] */
} tpml_digest_values;
/*
* TCG_PCR_EVENT2 header
*/
typedef struct {
/* The PCR Index to which this event was extended */
uint32_t pcr_index; /* PCRIndex */
/* Type of event */
uint32_t event_type; /* EventType */
/* Digests:
* A counted list of tagged digests, which contain the digest of
* the event data (or external data) for all active PCR banks
*/
tpml_digest_values digests; /* Digests */
} event2_header_t;
typedef struct event2_data {
/* The size of the event data */
uint32_t event_size; /* EventSize */
/* The data of the event */
uint8_t event[]; /* Event[EventSize] */
} event2_data_t;
/*
* Startup Locality Event
* Ref. TCG PC Client Platform Firmware Profile 9.4.5.3
*/
typedef struct {
/*
* The NUL-terminated ASCII string "StartupLocality" SHALL be
* set to {0x53 0x74 0x61 0x72 0x74 0x75 0x70 0x4C 0x6F 0x63
* 0x61 0x6C 0x69 0x74 0x79 0x00}
*/
uint8_t signature[16];
/* The Locality Indicator which sent the TPM2_Startup command */
uint8_t startup_locality;
} startup_locality_event_t;
#pragma pack(pop)
#endif /* TCG_H */
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