tpm2-tss

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 Basics 0/5 ●

  • Identification

    This repository hosts source code implementing the Trusted Computing Group's (TCG) TPM2 Software Stack (TSS). This stack consists of the following layers from top to bottom:

    • Feature API (FAPI) as described in the TCG Feature API (FAPI) Specification along with TCG TSS 2.0 JSON Data Types and Policy Language Specification This API is designed to be very high-level API, intended to make programming with the TPM as simple as possible. The API functions are exposed through a single library: libtss2-fapi.
    • Enhanced System API (ESAPI) as described in the TCG TSS 2.0 Enhanced System API (ESAPI) Specification This API is a 1-to-1 mapping of the TPM2 commands documented in Part 3 of the TPM2 specification. Additionally there are asynchronous versions of each command. In addition to SAPI, the ESAPI performs tracking of meta data for TPM object and automatic calculation of session based authorization and encryption values. Both the synchronous and asynchronous API are exposed through a single library: libtss2-esys.
    • System API (SAPI) as described in the TCG TSS 2.0 System Level API (SAPI) Specification This API is a 1-to-1 mapping of the TPM2 commands documented in Part 3 of the TPM2 specification. Additionally there are asynchronous versions of each command. These asynchronous variants may be useful for integration into event-driven programming environments. Both the synchronous and asynchronous API are exposed through a single library: libtss2-sys.
    • Marshaling/Unmarshaling (MU) as described in the TCG TSS 2.0 Marshaling/Unmarshaling API Specification This API provides a set of marshaling and unmarshaling functions for all data types define by the TPM library specification. The Marshaling/Unmarshaling API is exposed through a library called libtss2-mu.
    • TPM Command Transmission Interface (TCTI) as described in the TCG TSS 2.0 TPM Command Transmission Interface (TCTI) API Specification. This API provides a standard interface to transmit / receive TPM command / response buffers. It is expected that any number of libraries implementing the TCTI API will be implemented as a way to abstract various platform specific IPC mechanisms. Currently this repository provides several TCTI implementations: libtss2-tcti-device, libtss2-tcti-tbs (for Windows), libtss2-tcti-swtpm and libtss2-tcti-mssim. The former should be used for direct access to the TPM through the Linux kernel driver. The latter implements the protocol exposed by the Microsoft software TPM2 simulator.
    • The TCG TSS 2.0 Overview and Common Structures Specification forms the basis for all implementations in this project. NOTE: We deviate from this 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.

  • Prerequisites


    Not enough for a badge.

    The project MUST achieve a silver level badge. [achieve_silver]

  • Project oversight


    Unknown required information, not enough for a badge.

    The project MUST have a "bus factor" of 2 or more. (URL required) [bus_factor]

    Unknown required information, not enough for a badge.

    The project MUST have at least two unassociated significant contributors. (URL required) [contributors_unassociated]

  • Other


    Unknown required information, not enough for a badge.

    The project MUST include a license statement in each source file. This MAY be done by including the following inside a comment near the beginning of each file: SPDX-License-Identifier: [SPDX license expression for project]. [license_per_file]

  • Public version-controlled source repository


    Enough for a badge!

    The project's source repository MUST use a common distributed version control software (e.g., git or mercurial). [repo_distributed]

    Repository on GitHub, which uses git. git is distributed.


    Unknown required information, not enough for a badge.

    The project MUST clearly identify small tasks that can be performed by new or casual contributors. (URL required) [small_tasks]

    Unknown required information, not enough for a badge.

    The project MUST require two-factor authentication (2FA) for developers for changing a central repository or accessing sensitive data (such as private vulnerability reports). This 2FA mechanism MAY use mechanisms without cryptographic mechanisms such as SMS, though that is not recommended. [require_2FA]

    Unknown required information, not enough for a badge.

    The project's two-factor authentication (2FA) SHOULD use cryptographic mechanisms to prevent impersonation. Short Message Service (SMS) based 2FA, by itself, does NOT meet this criterion, since it is not encrypted. [secure_2FA]

  • Coding standards


    Unknown required information, not enough for a badge.

    The project MUST document its code review requirements, including how code review is conducted, what must be checked, and what is required to be acceptable. (URL required) [code_review_standards]

    Unknown required information, not enough for a badge.

    The project MUST have at least 50% of all proposed modifications reviewed before release by a person other than the author, to determine if it is a worthwhile modification and free of known issues which would argue against its inclusion [two_person_review]

  • Working build system


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    The project MUST have a reproducible build. If no building occurs (e.g., scripting languages where the source code is used directly instead of being compiled), select "not applicable" (N/A). (URL required) [build_reproducible]

  • Automated test suite


    Unknown required information, not enough for a badge.

    A test suite MUST be invocable in a standard way for that language. (URL required) [test_invocation]

    invocation via simple standard 'make check'

    Warning: URL required, but no URL found.


    Enough for a badge!

    The project MUST implement continuous integration, where new or changed code is frequently integrated into a central code repository and automated tests are run on the result. (URL required) [test_continuous_integration]

    The tests are checked in under https://github.com/tpm2-software/tpm2-tss/tree/master/test and are perfomed on each commit using travis-ci. https://travis-ci.org/tpm2-software/tpm2-tss


    Unknown required information, not enough for a badge.

    The project MUST have FLOSS automated test suite(s) that provide at least 90% statement coverage if there is at least one FLOSS tool that can measure this criterion in the selected language. [test_statement_coverage90]

    Unknown required information, not enough for a badge.

    The project MUST have FLOSS automated test suite(s) that provide at least 80% branch coverage if there is at least one FLOSS tool that can measure this criterion in the selected language. [test_branch_coverage80]

  • Use basic good cryptographic practices

    Note that some software does not need to use cryptographic mechanisms. If your project produces software that (1) includes, activates, or enables encryption functionality, and (2) might be released from the United States (US) to outside the US or to a non-US-citizen, you may be legally required to take a few extra steps. Typically this just involves sending an email. For more information, see the encryption section of Understanding Open Source Technology & US Export Controls.

    Unknown required information, not enough for a badge.

    The software produced by the project MUST support secure protocols for all of its network communications, such as SSHv2 or later, TLS1.2 or later (HTTPS), IPsec, SFTP, and SNMPv3. Insecure protocols such as FTP, HTTP, telnet, SSLv3 or earlier, and SSHv1 MUST be disabled by default, and only enabled if the user specifically configures it. If the software produced by the project does not support network communications, select "not applicable" (N/A). [crypto_used_network]

    Unknown required information, not enough for a badge.

    The software produced by the project MUST, if it supports or uses TLS, support at least TLS version 1.2. Note that the predecessor of TLS was called SSL. If the software does not use TLS, select "not applicable" (N/A). [crypto_tls12]

  • Secured delivery against man-in-the-middle (MITM) attacks


    Unknown required information, not enough for a badge.

    The project website, repository (if accessible via the web), and download site (if separate) MUST include key hardening headers with nonpermissive values. (URL required) [hardened_site]

    Found all required security hardening headers.

    Warning: URL required, but no URL found.


  • Other security issues


    Unknown required information, not enough for a badge.

    The project MUST have performed a security review within the last 5 years. This review MUST consider the security requirements and security boundary. [security_review]

    Unknown required information, not enough for a badge.

    Hardening mechanisms MUST be used in the software produced by the project so that software defects are less likely to result in security vulnerabilities. (URL required) [hardening]

  • Dynamic code analysis


    Not enough for a badge.

    The project MUST apply at least one dynamic analysis tool to any proposed major production release of the software produced by the project before its release. [dynamic_analysis]

    Currently not implemented - code coverage is above 80% using the automatic testsuite.


    Barely enough for a badge.

    The project SHOULD include many run-time assertions in the software it produces and check those assertions during dynamic analysis. [dynamic_analysis_enable_assertions]

    Currently not implemented - code coverage is above 80% using the automatic testsuite



This data is available under the Creative Commons Attribution version 3.0 or later license (CC-BY-3.0+). All are free to share and adapt the data, but must give appropriate credit. Please credit Peter Huewe and the OpenSSF Best Practices badge contributors.

Project badge entry owned by: Peter Huewe.
Entry created on 2018-11-08 16:22:22 UTC, last updated on 2020-11-24 13:31:51 UTC. Last achieved passing badge on 2019-04-01 19:29:20 UTC.

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