Re: I-D Action: draft-ietf-httpbis-digest-headers-12.txt
Rob Sayre <sayrer@gmail.com> Sat, 22 April 2023 18:11 UTC
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From: Rob Sayre <sayrer@gmail.com>
Date: Sat, 22 Apr 2023 11:08:52 -0700
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To: ietf-http-wg@w3.org, Roberto Polli <robipolli@gmail.com>, Lucas Pardue <lucaspardue.24.7@gmail.com>
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Subject: Re: I-D Action: draft-ietf-httpbis-digest-headers-12.txt
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Hi, I'm a little confused by the last paragraph of Section 6.4: Usage in Trailer Fields. > Not every hashing algorithm is suitable for use in the trailer section, some may > require to preprocess the whole content before sending a message (e.g., see [I-D.thomson-http-mice]). Firstly, there's a small grammar problem with "require to...". But that's not my main concern. Isn't the point of using a trailer to work around those algorithms that require processing all of the content? For example, the code samples for Python's "hashlib" show SHA-256: https://docs.python.org/3/library/hashlib.html Presumably, you'd call the update() method as you put bits on the wire, and then put the result of digest() in the trailer. draft-thomson-http-mice-02 would seem to address issues with "eager processing" that the document covered in the previous paragraph. Anyway, I think there's something to fix here, even if I am confused about the technical issue. thanks, Rob On Thu, Apr 13, 2023 at 7:54 AM <internet-drafts@ietf.org> wrote: > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. This Internet-Draft is a work item of the HTTP (HTTPBIS) WG of > the IETF. > > Title : Digest Fields > Authors : Roberto Polli > Lucas Pardue > Filename : draft-ietf-httpbis-digest-headers-12.txt > Pages : 41 > Date : 2023-04-13 > > Abstract: > This document defines HTTP fields that support integrity digests. > The Content-Digest field can be used for the integrity of HTTP > message content. The Repr-Digest field can be used for the integrity > of HTTP representations. Want-Content-Digest and Want-Repr-Digest > can be used to indicate a sender's interest and preferences for > receiving the respective Integrity fields. > > This document obsoletes RFC 3230 and the Digest and Want-Digest HTTP > fields. > > The IETF datatracker status page for this Internet-Draft is: > https://datatracker.ietf.org/doc/draft-ietf-httpbis-digest-headers/ > > There is also an HTML version available at: > https://www.ietf.org/archive/id/draft-ietf-httpbis-digest-headers-12.html > > A diff from the previous version is available at: > > https://author-tools.ietf.org/iddiff?url2=draft-ietf-httpbis-digest-headers-12 > > Internet-Drafts are also available by rsync at rsync.ietf.org: > :internet-drafts > > > _______________________________________________ > I-D-Announce mailing list > I-D-Announce@ietf.org > https://www.ietf.org/mailman/listinfo/i-d-announce > Internet-Draft directories: http://www.ietf.org/shadow.html > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt >
- I-D Action: draft-ietf-httpbis-digest-headers-12.… internet-drafts
- Re: I-D Action: draft-ietf-httpbis-digest-headers… Rob Sayre
- Re: I-D Action: draft-ietf-httpbis-digest-headers… Lucas Pardue