ST33TPHF20SPI datasheet(17/47 Pages) STMICROELECTRONICS

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FIPS140-2 SECURITY POLICY

Page 17 of 47

NON-PROPRIETARY DOCUMENT

1.7.1

Security module configuration

1.7.1.1

AAF0 / AHB3 / AHB7

These security module configurations implement both TPM1.2 and TPM2.0 specifications and

are set to operate by default in TPM1.2 mode. To set and irreversibility lock the security module

in the TPM2.0 mode, TPM operator shall:



Execute the TPM_SetMode proprietary command with the following parameters:

mode = 0x01 (TPMLib SET to switch to TPM2.0)

modeLock = 0x01 (TPMLibLock SET to lock the selected mode)



Reset the TPM

1.7.1.2

AAF1 / AHB4 / AHB8

These security module configurations implement both TPM1.2 and TPM2.0 specifications and

are set to operate by default in TPM2.0 mode. To irreversibility lock the security module in the

TPM2.0 mode, TPM operator shall:



Execute the TPM2_SetMode proprietary command with the following parameters:

mode = 0x01 (TPMLib SET to maintain the module in TPM2.0 mode)

modeLock = 0x01 (TPMLibLock SET to lock the selected mode)



Reset the TPM

1.7.1.3

AAF3 / AHB9

No action requested for these security modules configurations.

1.7.2

Approved modes of operation

TPM supports 2 sequential approved modes of operation.

1.7.2.1

Approved mode 1

This mode is the default mode when TPM starts. This mode is limited to a subset of TPM

services.

Table 12: Approved mode 1

Properties

Description

Definition

Transient mode of operation when TPM is power-up and

before TPM2_SelfTest(full=YES) execution

Configuration

No configuration required

Services available

List of available services is indicated in last column of Table

18: Command support table.

Algorithms used

SHA / HMAC / AES / DRBG / KDF / TDES

CSPs used

List of CSPs that might be accessed in this mode is indicated

in Table 18: Command support table.

Self-tests

SHS / HMAC / AES / DRBG / KDF / TDES / HW integrity / FW

integrity / NDRNG

1.7.2.2

Approved mode 2

This mode is the full FIPS approved mode of operation.

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