#include <security/tpm/tss.h>
#include <commonlib/tcpa_log_serialized.h>
#include <commonlib/region.h>
#include <vb2_api.h>

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Macros
#define	TPM_PCR_MAX_LEN 64

#define	HASH_DATA_CHUNK_SIZE 1024

Functions
struct tcpa_table *	tcpa_log_init (void)
	Get the pointer to the single instance of global tcpa log data, and initialize it when necessary. More...

void	tcpa_preram_log_clear (void)
	Clears the pre-RAM tcpa log data and initializes any content with default values. More...

void	tcpa_log_add_table_entry (const char name, const uint32_t pcr, enum vb2_hash_algorithm digest_algo, const uint8_t digest, const size_t digest_len)
	Add table entry for cbmem TCPA log. More...

void	tcpa_log_dump (void *unused)
	Dump TCPA log entries on console. More...

uint32_t	tpm_extend_pcr (int pcr, enum vb2_hash_algorithm digest_algo, const uint8_t digest, size_t digest_len, const char name)
	Ask vboot for a digest and extend a TPM PCR with it. More...

uint32_t	tpm_clear_and_reenable (void)
	Issue a TPM_Clear and re-enable/reactivate the TPM. More...

uint32_t	tpm_setup (int s3flag)
	Start the TPM and establish the root of trust. More...

uint32_t	tpm_measure_region (const struct region_device rdev, uint8_t pcr, const char rname)
	Measure a given region device and extend given PCR with the result. More...

Macro Definition Documentation

◆ HASH_DATA_CHUNK_SIZE

#define HASH_DATA_CHUNK_SIZE 1024

Definition at line 12 of file tspi.h.

◆ TPM_PCR_MAX_LEN

#define TPM_PCR_MAX_LEN 64

Definition at line 11 of file tspi.h.

Function Documentation

◆ tcpa_log_add_table_entry()

void tcpa_log_add_table_entry	(	const char *	name,
		const uint32_t	pcr,
		enum vb2_hash_algorithm	digest_algo,
		const uint8_t *	digest,
		const size_t	digest_len
	)

Add table entry for cbmem TCPA log.

Parameters

name	Name of the hashed data
pcr	PCR used to extend hashed data
diget_algo	sets the digest algorithm
digest	sets the hash extended into the tpm
digest_len	the length of the digest

Definition at line 79 of file log.c.

References BIOS_WARNING, tcpa_entry::digest, tcpa_entry::digest_length, tcpa_entry::digest_type, tcpa_table::entries, tcpa_table::max_entries, memcpy(), name, tcpa_entry::name, tcpa_table::num_entries, tcpa_entry::pcr, printk, strncpy(), TCPA_DIGEST_MAX_LENGTH, tcpa_log_init(), TCPA_PCR_HASH_LEN, and TCPA_PCR_HASH_NAME.

Referenced by tpm_extend_pcr().

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◆ tcpa_log_dump()

void tcpa_log_dump ( void * unused )

Dump TCPA log entries on console.

Definition at line 54 of file log.c.

References BIOS_INFO, tcpa_entry::digest, tcpa_entry::digest_length, tcpa_entry::digest_type, tcpa_table::entries, tcpa_entry::name, tcpa_table::num_entries, tcpa_entry::pcr, printk, and tcpa_log_init().

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◆ tcpa_log_init()

struct tcpa_table* tcpa_log_init ( void )

Get the pointer to the single instance of global tcpa log data, and initialize it when necessary.

Definition at line 33 of file log.c.

References cbmem_possibly_online(), CONFIG, ENV_ROMSTAGE, and tcpa_cbmem_init().

Referenced by tcpa_log_add_table_entry(), tcpa_log_dump(), and tspi_measure_cache_to_pcr().

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◆ tcpa_preram_log_clear()

void tcpa_preram_log_clear ( void )

Clears the pre-RAM tcpa log data and initializes any content with default values.

Definition at line 116 of file log.c.

References BIOS_INFO, tcpa_table::max_entries, MAX_TCPA_LOG_ENTRIES, tcpa_table::num_entries, and printk.

Referenced by tspi_init_crtm().

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◆ tpm_clear_and_reenable()

uint32_t tpm_clear_and_reenable ( void )

Issue a TPM_Clear and re-enable/reactivate the TPM.

Returns: TPM_SUCCESS on success. If not a tpm error is returned

Definition at line 192 of file tspi.c.

References BIOS_ERR, BIOS_INFO, printk, tlcl_force_clear(), tlcl_set_deactivated(), tlcl_set_enable(), and TPM_SUCCESS.

Referenced by _factory_initialize_tpm(), safe_define_space(), safe_write(), and vb2ex_tpm_clear_owner().

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◆ tpm_extend_pcr()

uint32_t tpm_extend_pcr	(	int	pcr,
		enum vb2_hash_algorithm	digest_algo,
		const uint8_t *	digest,
		size_t	digest_len,
		const char *	name
	)

Ask vboot for a digest and extend a TPM PCR with it.

Parameters

pcr	sets the pcr index
diget_algo	sets the digest algorithm
digest	sets the hash to extend into the tpm
digest_len	the length of the digest
name	sets additional info where the digest comes from