src/security/tpm/tpm2_log_serialized.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2
   3 #ifndef __TPM2_LOG_SERIALIZED_H__
   4 #define __TPM2_LOG_SERIALIZED_H__
   5
   6 #include <commonlib/bsd/tpm_log_defs.h>
   7
   8 #define TPM_20_SPEC_ID_EVENT_SIGNATURE "Spec ID Event03"
   9 #define TPM_20_LOG_DATA_MAX_LENGTH 50
  10
  11 #define TPM_20_LOG_VI_MAGIC 0x32544243 /* "CBT2" in LE */
  12 #define TPM_20_LOG_VI_MAJOR 1
  13 #define TPM_20_LOG_VI_MINOR 0
  14
  15 /*
  16  * TPM2.0 log entries can't be generally represented as C structures due to
  17  * varying number of digests and their sizes. However, it works as long as
  18  * we're only using single kind of digests.
  19  */
  20 #if CONFIG(TPM_LOG_TPM2)
  21 #  if CONFIG(TPM_HASH_SHA1)
  22 #    define TPM_20_LOG_DIGEST_MAX_LENGTH SHA1_DIGEST_SIZE
  23 #  endif
  24 #  if CONFIG(TPM_HASH_SHA256)
  25 #    define TPM_20_LOG_DIGEST_MAX_LENGTH SHA256_DIGEST_SIZE
  26 #  endif
  27 #  if CONFIG(TPM_HASH_SHA384)
  28 #    define TPM_20_LOG_DIGEST_MAX_LENGTH SHA384_DIGEST_SIZE
  29 #  endif
  30 #  if CONFIG(TPM_HASH_SHA512)
  31 #    define TPM_20_LOG_DIGEST_MAX_LENGTH SHA512_DIGEST_SIZE
  32 #  endif
  33
  34 #  ifndef TPM_20_LOG_DIGEST_MAX_LENGTH
  35 #    error "Misconfiguration: failed to determine TPM hashing algorithm"
  36 #  endif
  37 #else
  38 #  define TPM_20_LOG_DIGEST_MAX_LENGTH 1 /* To avoid compilation error */
  39 #endif
  40
  41 /* TCG_PCR_EVENT2 */
  42 struct tpm_2_log_entry {
  43         uint32_t pcr;
  44         uint32_t event_type;
  45         uint32_t digest_count; /* Always 1 in current implementation */
  46         uint16_t digest_type;
  47         uint8_t digest[TPM_20_LOG_DIGEST_MAX_LENGTH];
  48         uint32_t data_length;
  49         uint8_t data[TPM_20_LOG_DATA_MAX_LENGTH];
  50 } __packed;
  51
  52 struct tpm_2_vendor {
  53         uint8_t reserved;
  54         uint8_t version_major;
  55         uint8_t version_minor;
  56         uint32_t magic;
  57         uint16_t max_entries;
  58         uint16_t num_entries;
  59         uint32_t entry_size;
  60 } __packed;
  61
  62 struct tpm_2_log_table {
  63         struct tcg_efi_spec_id_event header; /* TCG_PCR_EVENT actually */
  64         struct tpm_digest_sizes digest_sizes[1];
  65         uint8_t vendor_info_size;
  66         struct tpm_2_vendor vendor;
  67         struct tpm_2_log_entry entries[]; /* Variable number of entries */
  68 } __packed;
  69
  70 #endif