Internet DRAFT - draft-moran-suit-mti
draft-moran-suit-mti
SUIT B. Moran
Internet-Draft Arm Limited
Intended status: Standards Track 24 October 2022
Expires: 27 April 2023
Mandatory-to-Implement Algorithms for Creators and Consumers of Software
Update for the Internet of Things manifests
draft-moran-suit-mti-02
Abstract
This document specifies algorithm profiles for SUIT manifest parsers
and authors to ensure better interoperability. These profiles apply
specifically to a constrained node software update use case.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 27 April 2023.
Copyright Notice
Copyright (c) 2022 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Please review these documents carefully, as they describe your rights
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Digest Algorithms . . . . . . . . . . . . . . . . . . . . 3
2.2. Authentication Algorithms . . . . . . . . . . . . . . . . 3
2.2.1. Symmetric Authentication Algorithm . . . . . . . . . 3
2.2.2. Asymmetric Classical Authentication Algorithms . . . 3
2.2.3. Asymmetric Post-Quantum Authentication Algorithms . . 3
2.3. Key Exchange Algorithms . . . . . . . . . . . . . . . . . 3
2.3.1. Symmetric . . . . . . . . . . . . . . . . . . . . . . 4
2.3.2. Classical Asymmetric . . . . . . . . . . . . . . . . 4
2.4. Encryption Algorithms . . . . . . . . . . . . . . . . . . 4
3. Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Symmetric MTI profile: suit-sha256-hmac-a128-ccm . . . . 4
3.2. Current Asymmetric MTI Profile 1:
suit-sha256-es256-hpke-a128gcm . . . . . . . . . . . . . 4
3.3. Current Asymmetric MTI Profile 2:
suit-sha256-ed256-hpke-a128gcm . . . . . . . . . . . . . 4
3.4. Future Asymmetric MTI Profile:
suit-sha256-hsslms-hpke-a128gcm . . . . . . . . . . . . . 5
3.5. Other Profiles: . . . . . . . . . . . . . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 6
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.1. Normative References . . . . . . . . . . . . . . . . . . 6
6.2. Informative References . . . . . . . . . . . . . . . . . 6
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
Mandatory algorithms may change over time due to an evolving threat
landscape. Algorithms are grouped into algorithm profiles to account
for this. Profiles may be deprecated over time. SUIT will define
four choices of MTI profile specifically for constrained node
software update. These profiles are:
* One Symmetric MTI profile
* Two "Current" Asymmetric MTI profiles
* One "Future" Asymmetric MTI profile
At least one MTI algorithm in each category MUST be FIPS qualified.
Because SUIT presents an asymmetric communication profile, with
powerful/complex manifest authors and constrined manifest recipients,
the requirements for Recipients and Authors are different.
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Recipients MAY choose which MTI profile they wish to implement. It
is RECOMMENDED thaty they implement the "Future" Asymmetric MTI
profile. Recipients MAY implement any number of other profiles.
Authors MUST implement all MTI profiles. Authors MAY implement any
number of other profiles.
Other use-cases of SUIT MAY define their own MTI algorithms.
2. Algorithms
The algorithms that form a part of the profiles defined in this
document are grouped into:
* Digest Algorithms
* Authentication Algorithms
* Key Exchange Algorithms
* Encryption Algorithms
2.1. Digest Algorithms
* SHA-256 (-16)
2.2. Authentication Algorithms
Authentication Algorithms are divided into three categories:
2.2.1. Symmetric Authentication Algorithm
* HMAC-256 (5)
2.2.2. Asymmetric Classical Authentication Algorithms
* ES256 (-7)
* EdDSA (-8)
2.2.3. Asymmetric Post-Quantum Authentication Algorithms
* HSS-LMS (-46) [RFC8778]
2.3. Key Exchange Algorithms
Key Exchange Algorithms are divided into two three groups: Symmetric,
Classical Asymmetric, and Post-Quantum Asymmetric
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2.3.1. Symmetric
* A128 (-3)
2.3.2. Classical Asymmetric
* COSE HPKE (TBD)
* ECDH-ES + HKDF-256 (-25)
2.4. Encryption Algorithms
* A128GCM (1)
3. Profiles
Recognized profiles are defined below.
3.1. Symmetric MTI profile: suit-sha256-hmac-a128-ccm
This profile requires the following algorithms:
* SHA-256
* HMAC-256
* A128W Key Wrap
* AES-CCM-16-128-128
3.2. Current Asymmetric MTI Profile 1: suit-sha256-es256-hpke-a128gcm
This profile requires the following algorithms:
* SHA-256
* ES256
* HPKE
* AES-128-GCM
3.3. Current Asymmetric MTI Profile 2: suit-sha256-ed256-hpke-a128gcm
This profile requires the following algorithms:
* SHA-256
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* EDDSA
* HPKE
* AES-128-GCM
3.4. Future Asymmetric MTI Profile: suit-sha256-hsslms-hpke-a128gcm
This profile requires the following algorithms:
* SHA-256
* HSS-LMS
* HPKE
* AES-128-GCM
3.5. Other Profiles:
Optional classical and PQC profiles are defined below.
* suit-sha256-eddsa-ecdh-es-chacha-poly
- SHA-256
- EdDSA
- ECDH-ES + HKDF-256
- ChaCha20 + Poly1305
* suit-sha256-falcon512-hpke-a128gcm
- SHA-256
- HSS-LMS
- HPKE
- AES-128-GCM
* suit-shake256-dilithium-kyber-a128gcm
- SHAKE256
- Crystals-Dilithium
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- Crystal-Kyber
- AES-128GCM
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, July 2017,
<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, April 2020,
<https://www.rfc-editor.org/info/rfc8778>.
6.2. Informative References
[I-D.ietf-suit-manifest]
Moran, B., Tschofenig, H., Birkholz, H., Zandberg, K., and
O. Rønningstad, "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-20, 7 October
2022, <https://www.ietf.org/archive/id/draft-ietf-suit-
manifest-20.txt>.
Author's Address
Brendan Moran
Arm Limited
Email: brendan.moran.ietf@gmail.com
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