[dhcwg] about draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-02.txt
Francis Dupont <Francis.Dupont@fdupont.fr> Wed, 19 July 2017 10:42 UTC
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From: Francis Dupont <Francis.Dupont@fdupont.fr>
To: dhcwg@ietf.org
Date: Wed, 19 Jul 2017 12:26:08 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/dhcwg/UlG6XbGcF5UzHC4Riemp8uM6QoM>
Subject: [dhcwg] about draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-02.txt
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I red draft-nalluri-dhc-dhcpv6-lwm2m-bootstrap-options-02.txt (it is in the agenda this afternnon) and I found two loose references to RFC 7296 (IKEv2) section 3.6 (CERT payload). I have two concerns about this: - certificates can be very large, at least larger than a DHCPv4 option can carry - as IKEv2 is over UDP too this problem is addressed in RFC 7296 by allowing many different "encodings" (currently 15 in the IANA registry). So I am afraid authors just took a good text about certificate transport (BTW I'd pick the same one so my concern is not about the choice) but missed to add an additional statement about application. I propose: - add something about the encoding byte so nobody will forget to read RFC 7296 and for instance put a X.509 certificate as the whole content - make a few encodings mandatory to support (*) Thanks Francis.Dupont@fdupont.fr PS (*): if it makes sense in environments where LWM2M is/will be deployed I highly recommend the hash and URL formats. BTW they were introduced in IKEv2 so in RFC 7296 a notify was added to indicate support. This is no necessary for this I-D and of course it avoids large payload problems (it was designed with this goal).
- [dhcwg] about draft-nalluri-dhc-dhcpv6-lwm2m-boot… Francis Dupont