Re: [Dcrup] combo update draft-ietf-dcrup-dkim-crypto-01
"John R Levine" <johnl@taugh.com> Mon, 12 June 2017 15:07 UTC
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Date: Mon, 12 Jun 2017 16:07:05 +0100
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From: John R Levine <johnl@taugh.com>
To: Martin Thomson <martin.thomson@gmail.com>
Cc: dcrup@ietf.org
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Subject: Re: [Dcrup] combo update draft-ietf-dcrup-dkim-crypto-01
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> Quick comments: > > sig-a-tag-k = "rsa" / "rsafp" / "eddsa" / "eddsafp" x-sig-a-tag-k > > This is missing a '/' for the extension piece. Also, I would instead do: It's supposed to replace the existing sig-a-tag-k and key-k-tag-type rules, not add new ones. The explanatory wording could use some work. > 1. You need to explicitly state that the hash function for the > signature scheme is used to construct the fingerprint. Here's what it says now. This seems reasonably clear. The DNS record contains a sha-256 hash of the public key, stored in base64 in the p= tag. The key type tag MUST be present and contains k=rsafp or k=ecdhfp. I suppose I could change that to say use the hash of the signing algorithm if people think that's a good idea, but if we add algorithms that use hashes other than sha-256, we'll need another update anyway. > 2. You need to explain how to validate a signature. OK. > This description could be made generic so that (for example) PQ > schemes could use this. No, my goal is to make the minimum changes needed. The more options, the more chances not to interoperate. R's, John
- [Dcrup] combo update draft-ietf-dcrup-dkim-crypto… John R Levine
- Re: [Dcrup] combo update draft-ietf-dcrup-dkim-cr… Martin Thomson
- Re: [Dcrup] combo update draft-ietf-dcrup-dkim-cr… John R Levine
- Re: [Dcrup] combo update draft-ietf-dcrup-dkim-cr… Martin Thomson
- Re: [Dcrup] Is there anything this WG wants to do… John Levine
- Re: [Dcrup] Is there anything this WG wants to do… Salz, Rich
- Re: [Dcrup] Is there anything this WG wants to do… Eric Rescorla
- Re: [Dcrup] Is there anything this WG wants to do… John R Levine
- Re: [Dcrup] Is there anything this WG wants to do… Eric Rescorla
- Re: [Dcrup] Is there anything this WG wants to do… Jon Callas
- Re: [Dcrup] key rotation, was Is there anything t… John R Levine
- Re: [Dcrup] Is there anything this WG wants to do… Scott Kitterman
- Re: [Dcrup] Is there anything this WG wants to do… Scott Kitterman
- Re: [Dcrup] Is there anything this WG wants to do… John R. Levine
- Re: [Dcrup] Is there anything this WG wants to do… John R. Levine
- Re: [Dcrup] Is there anything this WG wants to do… Scott Kitterman
- Re: [Dcrup] Is there anything this WG wants to do… Peter Goldstein