Re: [TLS] Certificate keyUsage enforcement question (new in RFC8446 Appendix E.8)
Peter Gutmann <pgut001@cs.auckland.ac.nz> Fri, 09 November 2018 06:19 UTC
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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: "<tls@ietf.org>" <tls@ietf.org>
Thread-Topic: [TLS] Certificate keyUsage enforcement question (new in RFC8446 Appendix E.8)
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Date: Fri, 09 Nov 2018 06:19:32 +0000
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Subject: Re: [TLS] Certificate keyUsage enforcement question (new in RFC8446 Appendix E.8)
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Viktor Dukhovni <ietf-dane@dukhovni.org> writes: >Well, ECDH keys (not really ECDSA) can do key agreement, and EC keys can be >used for encryption with ECIES. Sure, in theory, but in practice I've never seen an (EC)DH cert used in TLS (despite actively looking for one, since it'd be a collectors item for the cert collection [0]), and I doubt most implementations could even deal with one if they saw one. Also, I don't think any TLS implementation, or specification, does ECIES. So it's pretty much self-regulating... Peter. [0] I know some test certs were generated about 20 years ago to demonstrate X9.42 use in S/MIME, but that's all I'm aware of.
- [TLS] Certificate keyUsage enforcement question (… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Geoffrey Keating
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Martin Rex
- Re: [TLS] Certificate keyUsage enforcement [whose… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… David Benjamin
- Re: [TLS] Certificate keyUsage enforcement questi… Geoffrey Keating
- Re: [TLS] Certificate keyUsage enforcement [whose… Peter Gutmann
- Re: [TLS] Certificate keyUsage enforcement [whose… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Blumenthal, Uri - 0553 - MITLL
- Re: [TLS] Certificate keyUsage enforcement questi… Peter Gutmann
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Peter Gutmann
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Yoav Nir
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Tony Putman
- Re: [TLS] Certificate keyUsage enforcement questi… Viktor Dukhovni
- Re: [TLS] Certificate keyUsage enforcement questi… Andrei Popov
- Re: [TLS] Certificate keyUsage enforcement questi… Nikos Mavrogiannopoulos