Module tpm_commands 

TPM 2.0 Command Structures

TPM command and response packet formats per TPM 2.0 specification (Part 3).

TPM 2.0 Command Format

All TPM commands follow this structure:

+-------------------+
| Tag (2 bytes)     |  TPM_ST_SESSIONS or TPM_ST_NO_SESSIONS
+-------------------+
| Size (4 bytes)    |  Total packet size
+-------------------+
| Command (4 bytes) |  TPM_CC_* command code
+-------------------+
| Parameters        |  Command-specific
+-------------------+

Supported Commands

• TPM2_Startup / TPM2_Shutdown – lifecycle
• TPM2_GetRandom – hardware RNG
• TPM2_PCR_Read / TPM2_PCR_Extend – measured boot
• TPM2_SelfTest – POST diagnostics
• TPM2_GetCapability – feature query

Modules

capability

Well-known capability constants

hash_alg

TPM Hash Algorithms (TPM_ALG_*)

Structs

PcrSelection

PCR selection structure (TPMS_PCR_SELECTION)

TpmCommandHeader

TPM Command Header (10 bytes, big-endian on wire)

TpmGetCapabilityCommand

TPM2_GetCapability command for querying TPM properties.

TpmGetRandomCommand

TPM2_GetRandom command

TpmGetRandomResponse

TPM2_GetRandom response parser

TpmPcrExtendCommand

TPM2_PCR_Extend command

TpmPcrReadCommand

TPM2_PCR_Read command

TpmPcrReadResponse

TPM2_PCR_Read response parser

TpmResponseHeader

TPM Response Header (10 bytes, big-endian on wire)

TpmSelfTestCommand

TPM2_SelfTest command

TpmShutdownCommand

TPM2_Shutdown command

TpmStartupCommand

TPM2_Startup command

Enums

TpmCommandCode

TPM Command Codes (TPM_CC, partial list)

TpmResponseCode

TPM Response Codes (TPM_RC)

TpmShutdownType

TPM Shutdown Types (TPM_SU)

TpmStartupType

TPM Startup Types (TPM_SU)

TpmStructureTag

TPM Structure Tags (TPM_ST)

Functions

marshal_command

Marshal a generic TPM command into a byte buffer.

parse_response

Parse a TPM response buffer and extract the response code and payload.