Re: [secdir] secdir review of draft-ietf-csi-send-name-type-registry-03
"Patrick Cain" <pcain@coopercain.com> Mon, 17 May 2010 21:28 UTC
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From: Patrick Cain <pcain@coopercain.com>
To: 'Sean Turner' <turners@ieca.com>, 'Roque Gagliano' <roque.lacnic@gmail.com>
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Date: Mon, 17 May 2010 17:27:40 -0400
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Cc: iesg@ietf.org, draft-ietf-csi-send-name-type-registry.all@tools.ietf.org, secdir@ietf.org
Subject: Re: [secdir] secdir review of draft-ietf-csi-send-name-type-registry-03
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Sean, I'm not so sure that I was *asking* for it, as much as *pointing it out*. Roque, The additional numbers look just fine to me, but I am far from an expert in their use. Pat -----Original Message----- From: Sean Turner [mailto:turners@ieca.com] Sent: Monday, May 17, 2010 10:52 AM To: Roque Gagliano Cc: Stephen Kent; Patrick Cain; secdir@ietf.org; iesg@ietf.org; draft-ietf-csi-send-name-type-registry.all@tools.ietf.org Subject: Re: [secdir] secdir review of draft-ietf-csi-send-name-type-registry-03 That is what, I believe, Pat was asking for. spt Roque Gagliano wrote: > Stephen/ Patrick/Sean, > > Thank you for your comments. What about adding the following extra > numbers to the registry?: > > +---------+----------------------------------------------------+ > | Value | Description | > +---------+----------------------------------------------------+ > | 0 | Reserved | > | | | > | 1 | DER Encoded X.501 Name (RFC 3971) | > | | | > | 2 | FQDN (RFC 3971) | > | | | > | 3 | SHA-1 Subject Key Identifier (SKI) ( Section 3 ) | > | | | > | 4 | SHA-224 Subject Key Identifier (SKI) ( Section 3 ) | > | | | > | 5 | SHA-256 Subject Key Identifier (SKI) ( Section 3 ) | > | | | > | 6 | SHA-384 Subject Key Identifier (SKI) ( Section 3 ) | > | | | > | 7 | SHA-512 Subject Key Identifier (SKI) ( Section 3 ) | > | | | > | 253-254 | Experimental use | > | | | > | 255 | Reserved | > +---------+----------------------------------------------------+ > > This way we stay ready if SIDR certs uses some of these hashes > functions in the future. > > regards, > > Roque > > > On Wed, May 12, 2010 at 8:00 PM, Stephen Kent <kent@bbn.com> wrote: >> At 6:38 PM +0200 5/8/10, Roque Gagliano wrote: >> >> Patrick, >> >> Thank you for your review. >> >> You are correct oonly 160 bits SHA-1 hash is defined in RFC 5280 and >> required in draft-ietf-sidr-res-cert >> >> Regards, >> >> Roque >> >> Roque, >> 5280 defines how to use SHA-1, but it does not require use of this specific >> hash function. 4.2.1.2 says: >> For CA certificates, subject key identifiers SHOULD be derived from the >> public key or a method that generates unique values. Two common methods for >> generating key identifiers from the public key are: >> ... >> Other methods of generating unique numbers are also acceptable. >> So, use of another one-way hash function, e.g., SHA-256 meets the criteria >> defined above (associated with the "SHOULD") and is consistent with the >> final comment. >> CAs need to know which function to use, but RPs just perform comparisons. We >> could modify the RPKI cert profile (if Geoff and the SIDR WG don't mind) to >> specify use of SHA-256 for generation of SKI/AKI values. I guess the real >> issue is whether commonly used software (e.g., OpenSSL) will support this. >> Steve >
- [secdir] secdir review of draft-ietf-csi-send-nam… Patrick Cain
- Re: [secdir] secdir review of draft-ietf-csi-send… Roque Gagliano
- Re: [secdir] secdir review of draft-ietf-csi-send… Sean Turner
- Re: [secdir] secdir review of draft-ietf-csi-send… Stephen Kent
- Re: [secdir] secdir review of draft-ietf-csi-send… Sean Turner
- Re: [secdir] secdir review of draft-ietf-csi-send… Sean Turner
- Re: [secdir] secdir review of draft-ietf-csi-send… Roque Gagliano
- Re: [secdir] secdir review of draft-ietf-csi-send… Patrick Cain