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September 13-16, 2022
Dublin, Ireland + Virtual
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Wednesday, September 14 • 16:40 - 17:20
Implementing UEFI-based Secure Boot + OTA Update for Embedded ARM Devices - Jan Kiszka & Christian Storm, Siemens AG

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At ELC 2020, we presented our concept of securing the boot phase of updatable embedded devices leveraging UEFI Secure Boot. Applying this concept to a real 64-bit ARM device revealed some surprising rough edges lurking around the corners. In this talk, we dive into these issues and present solutions found while the journey. We explain how to adopt the pre-integration of an Over-the-Air Update method combined with Secure Boot that has been upstreamed to the Civil Infrastructure Platform project. In particular UEFI-based Secure Boot via U-Boot, hardening U-Boot for that, building unified kernel images with device tree override options, and creating a read-only rootfs with persistent overlays plus their integrity protection is covered. Although the pre-integration is done with the Debian-based embedded system builder Isar, the concepts and solutions presented are generic and easily transferable to other (meta-)distributions.
Speakers
avatar for Jan Kiszka

Jan Kiszka

Principal Key Expert, Siemens AG
Jan Kiszka is working as consultant, open source evangelist and Principal Key Expert Engineer in the Competence Center Embedded Linux at Siemens Technology. He is supporting Siemens businesses with adapting, enhancing or strategically driving open source as platform for their product... Read More →
avatar for Christian Storm

Christian Storm

Senior Key Expert, Siemens AG
Christian Storm works as Open Source consultant, Architect and Developer for Siemens Technology.

ELCE2022 UEFISecureBootOTAUpdatesOnARM pdf
Wednesday September 14, 2022 16:40 - 17:20 IST
Liffey Hall 2 (Level 1)
  Embedded Linux Conference (ELC), Build Systems, Embedded Distributions and Development Tools, Security, System Upgrades, Practical Experiences and War Stories