Internet-Draft MTI SUIT Algorithms July 2022
Moran Expires 12 January 2023 [Page]
Workgroup:
SUIT
Internet-Draft:
draft-moran-suit-mti-00
Published:
Intended Status:
Standards Track
Expires:
Author:
B. Moran
Arm Limited

Mandatory-to-Implement Algorithms for Creators and Consumers of Software Update for the Internet of Things manifests

Abstract

This document specifies algorithm profiles for SUIT manifest parsers and authors to ensure better interoperability.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on 12 January 2023.

Table of Contents

1. Introduction

Mandatory algorithms may change over time due to an evolving threat landscape. As a result these are grouped into profiles that a device should use.

the mandatory-to implement algorithms for SUIT are described in this draft in order to provide flexibility in the definition of algorithm profiles.

An authentication algorithm is REQUIRED for ALL SUIT manifests. Encryption algorithms MAY be provided.

2. Algorithms

The algorithms that form a part of the profiles defined in this document are grouped into:

2.1. Digest Algorithms

  • SHA-256 (-16)
  • SHAKE128 (-18)
  • SHA-384 (-43)
  • SHA-512 (-44)
  • SHAKE256 (-45)

2.2. Authentication Algorithms

Authentication Algorithms are divided into three categories:

2.2.1. Symmetric Authentication Algorithm

  • HMAC-256 (5)
  • HMAC-384 (6)
  • HMAC-512 (7)

2.2.2. Asymmetric Classical Authentication Algorithms

  • ES256 (-7)
  • EdDSA (-8)
  • ES384 (-35)
  • ES512 (-36)

2.2.3. Asymmetric Post-Quantum Authentication Algorithms

  • HSS-LMS (-46) [RFC8778]
  • XMSS (TBD)
  • Falcon-512 (TBD)
  • SPHINCS+ (TBD)
  • Crystals-Dilithium (TBD)

2.3. Key Exchange Algorithms

Key Exchange Algorithms are divided into two three groups: Symmetric, Classical Asymmetric, and Post-Quantum Asymmetric

2.3.1. Symmetric

  • A128 (-3)
  • A192 (-4)
  • A256 (-5)

2.3.2. Classical Asymmetric

  • HPKE (TBD)
  • ECDH-ES + HKDF-256 (-25)
  • ECDH-ES + HKDF-512 (-26)
  • ECDH-ES + A128KW (-29)
  • ECDH-ES + A192KW (-30)
  • ECDH-ES + A256KW (-31)

2.3.3. Post-Quantum Asymmetric

  • CRYSTALS-KYBER (TBD)

2.4. Encryption Algorithms

  • A128GCM (1)
  • A192GCM (2)
  • A256GCM (3)
  • ChaCha20/Poly1305 (24)
  • AES-MAC 128/128 (25)
  • AES-MAC 256/128 (26)
  • AES-CCM-16-128-128 (30)
  • AES-CCM-16-128-256 (31)
  • AES-CCM-64-128-128 (32)
  • AES-CCM-64-128-256 (33)

3. Profiles

The following profiles are defined by this draft:

4. Security Considerations

TODO

5. IANA Considerations

TODO

6. References

6.1. Normative References

[RFC8152]
Schaad, J., "CBOR Object Signing and Encryption (COSE)", RFC 8152, DOI 10.17487/RFC8152, , <https://www.rfc-editor.org/info/rfc8152>.
[RFC8778]
Housley, R., "Use of the HSS/LMS Hash-Based Signature Algorithm with CBOR Object Signing and Encryption (COSE)", RFC 8778, DOI 10.17487/RFC8778, , <https://www.rfc-editor.org/info/rfc8778>.

6.2. Informative References

[I-D.ietf-suit-manifest]
Moran, B., Tschofenig, H., Birkholz, H., and K. Zandberg, "A Concise Binary Object Representation (CBOR)-based Serialization Format for the Software Updates for Internet of Things (SUIT) Manifest", Work in Progress, Internet-Draft, draft-ietf-suit-manifest-17, , <https://www.ietf.org/archive/id/draft-ietf-suit-manifest-17.txt>.

Author's Address

Brendan Moran
Arm Limited