diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/efi_loader.h | 5 | ||||
| -rw-r--r-- | include/efi_tcg2.h | 94 | ||||
| -rw-r--r-- | include/tpm-v2.h | 77 |
3 files changed, 176 insertions, 0 deletions
diff --git a/include/efi_loader.h b/include/efi_loader.h index f550ced5687..3c68b85b68e 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -59,6 +59,9 @@ extern efi_handle_t efi_root; /* Set to EFI_SUCCESS when initialized */ extern efi_status_t efi_obj_list_initialized; +/* Flag used by the selftest to avoid detaching devices in ExitBootServices() */ +extern bool efi_st_keep_devices; + /* EFI system partition */ extern struct efi_system_partition { enum if_type if_type; @@ -405,6 +408,8 @@ efi_status_t efi_console_register(void); efi_status_t efi_disk_register(void); /* Called by efi_init_obj_list() to install EFI_RNG_PROTOCOL */ efi_status_t efi_rng_register(void); +/* Called by efi_init_obj_list() to install EFI_TCG2_PROTOCOL */ +efi_status_t efi_tcg2_register(void); /* Create handles and protocols for the partitions of a block device */ int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc, const char *if_typename, int diskid, diff --git a/include/efi_tcg2.h b/include/efi_tcg2.h new file mode 100644 index 00000000000..4214f767eab --- /dev/null +++ b/include/efi_tcg2.h @@ -0,0 +1,94 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Defines data structures and APIs that allow an OS to interact with UEFI + * firmware to query information about the device + * + * Copyright (c) 2020, Linaro Limited + */ + +#if !defined _EFI_TCG2_PROTOCOL_H_ +#define _EFI_TCG2_PROTOCOL_H_ + +#include <tpm-v2.h> + +#define EFI_TCG2_PROTOCOL_GUID \ + EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, \ + 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) + +/* TPMV2 only */ +#define TCG2_EVENT_LOG_FORMAT_TCG_2 0x00000002 + +/* SHA1, SHA256, SHA384, SHA512, TPM_ALG_SM3_256 */ +#define MAX_HASH_COUNT 5 +/* Algorithm Registry */ +#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 + +typedef u32 efi_tcg_event_log_bitmap; +typedef u32 efi_tcg_event_log_format; +typedef u32 efi_tcg_event_algorithm_bitmap; + +struct efi_tcg2_version { + u8 major; + u8 minor; +}; + +struct efi_tcg2_event_header { + u32 header_size; + u16 header_version; + u32 pcr_index; + u32 event_type; +} __packed; + +struct efi_tcg2_event { + u32 size; + struct efi_tcg2_event_header header; + u8 event[]; +} __packed; + +struct efi_tcg2_boot_service_capability { + u8 size; + struct efi_tcg2_version structure_version; + struct efi_tcg2_version protocol_version; + efi_tcg_event_algorithm_bitmap hash_algorithm_bitmap; + efi_tcg_event_log_bitmap supported_event_logs; + u8 tpm_present_flag; + u16 max_command_size; + u16 max_response_size; + u32 manufacturer_id; + u32 number_of_pcr_banks; + efi_tcg_event_algorithm_bitmap active_pcr_banks; +}; + +#define boot_service_capability_min \ + sizeof(struct efi_tcg2_boot_service_capability) - \ + offsetof(struct efi_tcg2_boot_service_capability, number_of_pcr_banks) + +struct efi_tcg2_protocol { + efi_status_t (EFIAPI * get_capability)(struct efi_tcg2_protocol *this, + struct efi_tcg2_boot_service_capability *capability); + efi_status_t (EFIAPI * get_eventlog)(struct efi_tcg2_protocol *this, + efi_tcg_event_log_format log_format, + u64 *event_log_location, u64 *event_log_last_entry, + bool *event_log_truncated); + efi_status_t (EFIAPI * hash_log_extend_event)(struct efi_tcg2_protocol *this, + u64 flags, u64 data_to_hash, + u64 data_to_hash_len, + struct efi_tcg2_event *efi_tcg_event); + efi_status_t (EFIAPI * submit_command)(struct efi_tcg2_protocol *this, + u32 input_parameter_block_size, + u8 *input_parameter_block, + u32 output_parameter_block_size, + u8 *output_parameter_block); + efi_status_t (EFIAPI * get_active_pcr_banks)(struct efi_tcg2_protocol *this, + u32 *active_pcr_banks); + efi_status_t (EFIAPI * set_active_pcr_banks)(struct efi_tcg2_protocol *this, + u32 active_pcr_banks); + efi_status_t (EFIAPI * get_result_of_set_active_pcr_banks)(struct efi_tcg2_protocol *this, + u32 *operation_present, + u32 *response); +}; +#endif diff --git a/include/tpm-v2.h b/include/tpm-v2.h index f6c045d3548..74c14fe7c51 100644 --- a/include/tpm-v2.h +++ b/include/tpm-v2.h @@ -1,6 +1,13 @@ /* SPDX-License-Identifier: GPL-2.0+ */ /* + * Defines APIs and structures that allow software to interact with a + * TPM2 device + * + * Copyright (c) 2020 Linaro * Copyright (c) 2018 Bootlin + * + * https://trustedcomputinggroup.org/resource/tss-overview-common-structures-specification/ + * * Author: Miquel Raynal <miquel.raynal@bootlin.com> */ @@ -11,6 +18,74 @@ #define TPM2_DIGEST_LEN 32 +#define TPM2_MAX_PCRS 32 +#define TPM2_PCR_SELECT_MAX ((TPM2_MAX_PCRS + 7) / 8) +#define TPM2_MAX_CAP_BUFFER 1024 +#define TPM2_MAX_TPM_PROPERTIES ((TPM2_MAX_CAP_BUFFER - sizeof(u32) /* TPM2_CAP */ - \ + sizeof(u32)) / sizeof(struct tpms_tagged_property)) + +/* + * We deviate from this draft of the specification by increasing the value of + * TPM2_NUM_PCR_BANKS from 3 to 16 to ensure compatibility with TPM2 + * implementations that have enabled a larger than typical number of PCR + * banks. This larger value for TPM2_NUM_PCR_BANKS is expected to be included + * in a future revision of the specification. + */ +#define TPM2_NUM_PCR_BANKS 16 + +/* Definition of (UINT32) TPM2_CAP Constants */ +#define TPM2_CAP_PCRS 0x00000005U +#define TPM2_CAP_TPM_PROPERTIES 0x00000006U + +/* Definition of (UINT32) TPM2_PT Constants */ +#define TPM2_PT_GROUP (u32)(0x00000100) +#define TPM2_PT_FIXED (u32)(TPM2_PT_GROUP * 1) +#define TPM2_PT_MANUFACTURER (u32)(TPM2_PT_FIXED + 5) +#define TPM2_PT_PCR_COUNT (u32)(TPM2_PT_FIXED + 18) +#define TPM2_PT_MAX_COMMAND_SIZE (u32)(TPM2_PT_FIXED + 30) +#define TPM2_PT_MAX_RESPONSE_SIZE (u32)(TPM2_PT_FIXED + 31) + +/* TPMS_TAGGED_PROPERTY Structure */ +struct tpms_tagged_property { + u32 property; + u32 value; +} __packed; + +/* TPMS_PCR_SELECTION Structure */ +struct tpms_pcr_selection { + u16 hash; + u8 size_of_select; + u8 pcr_select[TPM2_PCR_SELECT_MAX]; +} __packed; + +/* TPML_PCR_SELECTION Structure */ +struct tpml_pcr_selection { + u32 count; + struct tpms_pcr_selection selection[TPM2_NUM_PCR_BANKS]; +} __packed; + +/* TPML_TAGGED_TPM_PROPERTY Structure */ +struct tpml_tagged_tpm_property { + u32 count; + struct tpms_tagged_property tpm_property[TPM2_MAX_TPM_PROPERTIES]; +} __packed; + +/* TPMU_CAPABILITIES Union */ +union tpmu_capabilities { + /* + * Non exhaustive. Only added the structs needed for our + * current code + */ + struct tpml_pcr_selection assigned_pcr; + struct tpml_tagged_tpm_property tpm_properties; +} __packed; + +/* TPMS_CAPABILITY_DATA Structure */ +struct tpms_capability_data { + u32 capability; + union tpmu_capabilities data; +} __packed; + /** * TPM2 Structure Tags for command/response buffers. * @@ -123,11 +198,13 @@ enum tpm2_return_codes { * TPM2 algorithms. */ enum tpm2_algorithms { + TPM2_ALG_SHA1 = 0x04, TPM2_ALG_XOR = 0x0A, TPM2_ALG_SHA256 = 0x0B, TPM2_ALG_SHA384 = 0x0C, TPM2_ALG_SHA512 = 0x0D, TPM2_ALG_NULL = 0x10, + TPM2_ALG_SM3_256 = 0x12, }; /* NV index attributes */ |