diff options
Diffstat (limited to '')
| -rw-r--r-- | include/drivers/measured_boot/event_log/event_log.h | 127 | ||||
| -rw-r--r-- | include/drivers/measured_boot/event_log/tcg.h | 309 |
2 files changed, 436 insertions, 0 deletions
diff --git a/include/drivers/measured_boot/event_log/event_log.h b/include/drivers/measured_boot/event_log/event_log.h new file mode 100644 index 0000000..eb0e2b1 --- /dev/null +++ b/include/drivers/measured_boot/event_log/event_log.h @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2020-2022, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef EVENT_LOG_H +#define EVENT_LOG_H + +#include <stdint.h> + +#include <common/debug.h> +#include <common/tbbr/tbbr_img_def.h> +#include <drivers/auth/crypto_mod.h> +#include <drivers/measured_boot/event_log/tcg.h> + +/* + * Set Event Log debug level to one of: + * + * LOG_LEVEL_ERROR + * LOG_LEVEL_INFO + * LOG_LEVEL_WARNING + * LOG_LEVEL_VERBOSE + */ +#if EVENT_LOG_LEVEL == LOG_LEVEL_ERROR +#define LOG_EVENT ERROR +#elif EVENT_LOG_LEVEL == LOG_LEVEL_NOTICE +#define LOG_EVENT NOTICE +#elif EVENT_LOG_LEVEL == LOG_LEVEL_WARNING +#define LOG_EVENT WARN +#elif EVENT_LOG_LEVEL == LOG_LEVEL_INFO +#define LOG_EVENT INFO +#elif EVENT_LOG_LEVEL == LOG_LEVEL_VERBOSE +#define LOG_EVENT VERBOSE +#else +#error "Not supported EVENT_LOG_LEVEL" +#endif + +/* Number of hashing algorithms supported */ +#define HASH_ALG_COUNT 1U + +#define EVLOG_INVALID_ID UINT32_MAX + +#define MEMBER_SIZE(type, member) sizeof(((type *)0)->member) + +/* + * Each event log entry has some metadata (i.e. a string) that identifies + * what is measured.These macros define these strings. + * Note that these strings follow the standardization recommendations + * defined in the Arm Server Base Security Guide (a.k.a. SBSG, Arm DEN 0086), + * where applicable. They should not be changed in the code. + * Where the SBSG does not make recommendations, we are free to choose any + * naming convention. + * The key thing is to choose meaningful strings so that when the TPM event + * log is used in attestation, the different components can be identified. + */ +#define EVLOG_BL2_STRING "BL_2" +#define EVLOG_BL31_STRING "SECURE_RT_EL3" +#if defined(SPD_opteed) +#define EVLOG_BL32_STRING "SECURE_RT_EL1_OPTEE" +#elif defined(SPD_tspd) +#define EVLOG_BL32_STRING "SECURE_RT_EL1_TSPD" +#elif defined(SPD_tlkd) +#define EVLOG_BL32_STRING "SECURE_RT_EL1_TLKD" +#elif defined(SPD_trusty) +#define EVLOG_BL32_STRING "SECURE_RT_EL1_TRUSTY" +#else +#define EVLOG_BL32_STRING "SECURE_RT_EL1_UNKNOWN" +#endif +#define EVLOG_BL32_EXTRA1_STRING "SECURE_RT_EL1_OPTEE_EXTRA1" +#define EVLOG_BL32_EXTRA2_STRING "SECURE_RT_EL1_OPTEE_EXTRA2" +#define EVLOG_BL33_STRING "BL_33" +#define EVLOG_FW_CONFIG_STRING "FW_CONFIG" +#define EVLOG_HW_CONFIG_STRING "HW_CONFIG" +#define EVLOG_NT_FW_CONFIG_STRING "NT_FW_CONFIG" +#define EVLOG_SCP_BL2_STRING "SYS_CTRL_2" +#define EVLOG_SOC_FW_CONFIG_STRING "SOC_FW_CONFIG" +#define EVLOG_STM32_STRING "STM32" +#define EVLOG_TB_FW_CONFIG_STRING "TB_FW_CONFIG" +#define EVLOG_TOS_FW_CONFIG_STRING "TOS_FW_CONFIG" +#define EVLOG_RMM_STRING "RMM" +#define EVLOG_SP1_STRING "SP1" +#define EVLOG_SP2_STRING "SP2" +#define EVLOG_SP3_STRING "SP3" +#define EVLOG_SP4_STRING "SP4" +#define EVLOG_SP5_STRING "SP5" +#define EVLOG_SP6_STRING "SP6" +#define EVLOG_SP7_STRING "SP7" +#define EVLOG_SP8_STRING "SP8" + +typedef struct { + unsigned int id; + const char *name; + unsigned int pcr; +} event_log_metadata_t; + +#define ID_EVENT_SIZE (sizeof(id_event_headers_t) + \ + (sizeof(id_event_algorithm_size_t) * HASH_ALG_COUNT) + \ + sizeof(id_event_struct_data_t)) + +#define LOC_EVENT_SIZE (sizeof(event2_header_t) + \ + sizeof(tpmt_ha) + TCG_DIGEST_SIZE + \ + sizeof(event2_data_t) + \ + sizeof(startup_locality_event_t)) + +#define LOG_MIN_SIZE (ID_EVENT_SIZE + LOC_EVENT_SIZE) + +#define EVENT2_HDR_SIZE (sizeof(event2_header_t) + \ + sizeof(tpmt_ha) + TCG_DIGEST_SIZE + \ + sizeof(event2_data_t)) + +/* Functions' declarations */ +void event_log_buf_init(uint8_t *event_log_start, uint8_t *event_log_finish); +void event_log_init(uint8_t *event_log_start, uint8_t *event_log_finish); +void event_log_write_specid_event(void); +void event_log_write_header(void); +void dump_event_log(uint8_t *log_addr, size_t log_size); +const event_log_metadata_t *plat_event_log_get_metadata(void); +int event_log_measure(uintptr_t data_base, uint32_t data_size, + unsigned char hash_data[CRYPTO_MD_MAX_SIZE]); +void event_log_record(const uint8_t *hash, uint32_t event_type, + const event_log_metadata_t *metadata_ptr); +int event_log_measure_and_record(uintptr_t data_base, uint32_t data_size, + uint32_t data_id); +size_t event_log_get_cur_size(uint8_t *event_log_start); + +#endif /* EVENT_LOG_H */ diff --git a/include/drivers/measured_boot/event_log/tcg.h b/include/drivers/measured_boot/event_log/tcg.h new file mode 100644 index 0000000..4ac2c2f --- /dev/null +++ b/include/drivers/measured_boot/event_log/tcg.h @@ -0,0 +1,309 @@ +/* + * 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 */ |