Telechat Review of draft-ietf-anima-bootstrapping-keyinfra-28
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Reviewer: Dan Romascanu
Review Date: 2019-10-13
IETF LC End Date: None
IESG Telechat date: 2019-10-17
Summary: Ready with Issues
This document specifies automated bootstrapping of an Autonomic Control Plane by creating a Remote Secure Key Infrastructure (acronym BRSKI) using manufacturer installed X.509 certificates, in combination with a manufacturer's authorizing service, both online and offline.
Christian Huitema and Jari Arkko have performed early reviews of previous versions of the document for SecDir and Gen-ART. As far as I can tell, most if not all of their major concerns concerning applicability and security have been addressed in the latest versions. A few more minor issues described below would better be clarified before approval.
I also observe that the document has consistent Operational implications but there is no OPS-DIR review so far, as well as a YANG module and several other references to YANG, but there is no YANG Doctors review. I hope that these will be available prior to the IESG review.
1. The Pledge definition in section 1.2:
> Pledge: The prospective device, which has an identity installed at
while in the Introduction:
> ... new (unconfigured) devices that are called pledges in this
These two definitions seem different. The definition in 1.2 does not include the fact that the device is 'new (unconfigured'. Also, arguably 'identity installed at the factory' may be considered a form of configuration.
2. The document lacks an Operational Considerations section, which I believe is needed, taking into consideration the length and complexity of the document. There are many operational issues spread across the document concerning the type and resources of devices, speed of the bootstrapping process, migration pass, impact on network operation. I suggest to consider adding such a section pointing to the place where these issues are discussed and adding the necessary information if missing. Appendix A.1 in RFC 5706 can be used as a checklist of the issues to be discussed in such a section.
3. Section 5.4:
> Use of TLS 1.3 (or newer) is encouraged. TLS 1.2 or newer is
What is the reason for using 'encouraged'? Why not RECOMMENDED?
1. The Abstract includes:
'To do this a Remote Secure Key Infrastructure (BRSKI) is created'
Later in the document BRSKI is idefined as a protocol. It would be good to clarify if BRSKI = BRSKI protocol
2. In Section 1 - Introduction, 3rd paragraph:
s/it's default modes/its default modes/
s/it's strongest modes/its strongest modes/
3. Please expand non-obvious acronyms at first occurrence: EST protocol, LLNs, REST interface, LDAP, GRASP, CDDL, CSR
4. I would suggest alphabetic order listing of the terms in section 1.2
5. Section 1.3.1 - a reference for LDevID would be useful
6. Section 7:
s/Use of the suggested mechanism/Use of the suggested mechanisms/