A Firmware Update Architecture for Internet of Things
draft-ietf-suit-architecture-08
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2019-12-04
(latest revision 2019-11-19)
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draft-moran-suit-architecture
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Nov 2019 - Submit architecture ...
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SUIT B. Moran
Internet-Draft H. Tschofenig
Intended status: Informational Arm Limited
Expires: May 22, 2020 D. Brown
Linaro
M. Meriac
Consultant
November 19, 2019
A Firmware Update Architecture for Internet of Things
draft-ietf-suit-architecture-08
Abstract
Vulnerabilities with Internet of Things (IoT) devices have raised the
need for a solid and secure firmware update mechanism that is also
suitable for constrained devices. Incorporating such update
mechanism to fix vulnerabilities, to update configuration settings as
well as adding new functionality is recommended by security experts.
This document lists requirements and describes an architecture for a
firmware update mechanism suitable for IoT devices. The architecture
is agnostic to the transport of the firmware images and associated
meta-data.
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 May 22, 2020.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
Moran, et al. Expires May 22, 2020 [Page 1]
Internet-Draft A Firmware Update Architecture for IoT November 2019
This document is subject to BCP 78 and the IETF Trust's Legal
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Contributions published or made publicly available before November
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Without obtaining an adequate license from the person(s) controlling
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Terminology . . . . . . . . . . . . . . . . . 4
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1. Agnostic to how firmware images are distributed . . . . . 8
3.2. Friendly to broadcast delivery . . . . . . . . . . . . . 8
3.3. Use state-of-the-art security mechanisms . . . . . . . . 8
3.4. Rollback attacks must be prevented . . . . . . . . . . . 9
3.5. High reliability . . . . . . . . . . . . . . . . . . . . 9
3.6. Operate with a small bootloader . . . . . . . . . . . . . 9
3.7. Small Parsers . . . . . . . . . . . . . . . . . . . . . . 10
3.8. Minimal impact on existing firmware formats . . . . . . . 10
3.9. Robust permissions . . . . . . . . . . . . . . . . . . . 10
3.10. Operating modes . . . . . . . . . . . . . . . . . . . . . 11
3.11. Suitability to software and personalization data . . . . 13
4. Claims . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Communication Architecture . . . . . . . . . . . . . . . . . 14
6. Manifest . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7. Device Firmware Update Examples . . . . . . . . . . . . . . . 19
7.1. Single CPU SoC . . . . . . . . . . . . . . . . . . . . . 19
7.2. Single CPU with Secure - Normal Mode Partitioning . . . . 19
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