SUIT-based firmware update architecture Emmanuel Baccelli Kaspar - - PowerPoint PPT Presentation

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suit based firmware update architecture
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SUIT-based firmware update architecture Emmanuel Baccelli Kaspar - - PowerPoint PPT Presentation

Oct 11, 2023 150 likes •374 views

SUIT-based firmware update architecture Emmanuel Baccelli Kaspar Schleiser Koen Zandberg Outline Intro Update architecture overview Device Software Components Bootloader Project Ideas Intro 32/16/8 bit MCU

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SLIDE 1

SUIT-based firmware update architecture

Emmanuel Baccelli Kaspar Schleiser Koen Zandberg

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SLIDE 2

Outline

  • Intro
  • Update architecture overview
  • Device Software Components
  • Bootloader
  • Project Ideas
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SLIDE 3

Intro

  • 32/16/8 bit MCU
  • Open standards
  • Internet of Things
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SLIDE 4

Intro

  • RIOT SUIT example: https://git.io/suit-updater
  • SUIT VM (3.3GB):

http://demo-fit.saclay.inria.fr/vms/RIOT-VM.ova

  • Instructions: https://git.io/suit-hackathon
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SLIDE 5

Update architecture overview

Storage Server

  • 1. Provide firmware

& manifest

Gateway

  • 2. Notify Device

Firmware Manager

  • 3. Request Manifest

4.Request firmware

Device

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SLIDE 6

Update architecture overview

Focus on the storage server

  • Provides image and and manifest over CoAP
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SLIDE 7

Update architecture overview

Management station:

  • Allows remote firmware management and triggers

deployments.

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SLIDE 8

Update architecture overview

Node:

  • Receives manifest trigger over CoAP
  • Fetches manifest
  • Fetches firmware update
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SLIDE 9

Device Software Components

  • Manifest recap
  • Software component overview
  • Chosen implementations
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SLIDE 10

Device Software Components

SUIT Outer Wrapper COSE authentication Manifest Components Manifest Version Common Fetch & Install

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SLIDE 11

Device Software Components

RIOT CoAP SUIT Component writer Network CBOR COSE Crypto library Storage External libs

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SLIDE 12

Device Software Components

  • SUIT parser
  • libcose
  • NanoCBOR
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SLIDE 13

Device Software Components

RIOT Nanocoap suit_v4 Flashwrite Network NanoCBOR libcose Crypto library MCU Flash External libs

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SLIDE 14

Device Software Components

NanoCBOR

  • Pull style parser
  • 600B - 800B decoder
  • Optimized for parsing known structures

https://github.com/bergzand/NanoCBOR

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SLIDE 15

Device Software Components

Libcose

  • Embedded COSE library
  • Multiple crypto backend support

https://github.com/bergzand/libcose

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Device Software Components

SUIT parser

  • Based on NanoCBOR
  • libcose for verification
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Device Software Components

SUIT parser design

  • Iterate over the map
  • Multiple jump table based on map key
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SLIDE 18

Device Software Components

Flash layout

A Bootloader Header A B Header B

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SLIDE 19

Device Software Components

Flash partition writer

typedef struct { uint32_t magic_number; /**< Magic number */ uint32_t version; /**< Sequence No */ uint32_t start_addr; /**< Address */ uint32_t chksum; /**< Checksum */ } riotboot_hdr_t;

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SLIDE 20
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SLIDE 21

Bootloader

Just another RIOT application

  • 1. Iterate over all headers
  • 2. Determine whether the header is valid
  • 3. Determine highest valid sequence number
  • 4. Boot firmware
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SLIDE 22

Project Ideas

  • Extend manifest parsing
  • MCUboot interoperability
  • Infrastructure improvements