[Suit] Integrated Payload Keys

Brendan Moran <Brendan.Moran@arm.com> Thu, 22 July 2021 11:01 UTC

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From: Brendan Moran <Brendan.Moran@arm.com>
To: suit <suit@ietf.org>
Thread-Topic: Integrated Payload Keys
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Date: Thu, 22 Jul 2021 11:00:57 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/suit/nui3UJBOVOBIGd1vpi60pzILseg>
Subject: [Suit] Integrated Payload Keys
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I have been discussing the use of integrated payloads and dependencies more.  The current form of the draft requires that a URI Reference is converted into a numeric key in order to index a payload or dependency in the envelope. If we were to permit string keys in the envelope, we could eliminate this conversion.

For 1-character URI References, this would require 0-1 additional bytes per integrated payload/dependency: the keys permitted are key < 0 or key > 23. This has always borne the risk that it would intersect with future extensions. However, if we use string keys for integrated payloads and dependencies, we eliminate that risk and eliminate string->int conversions on the recipient device.

What does the WG think of allowing string keys in the SUIT_Envelope?

Best Regards,
Brendan
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