RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.txt
"Hollenbeck, Scott" <shollenbeck@verisign.com> Tue, 02 March 2004 02:23 UTC
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From: "Hollenbeck, Scott" <shollenbeck@verisign.com>
To: 'Russ Housley' <housley@vigilsec.com>, "'Sean P. Turner'" <turners@ieca.com>
Cc: 'Blake Ramsdell' <blake@brutesquadlabs.com>, "'ietf-smime@imc.org'" <ietf-smime@imc.org>
Subject: RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.txt
Date: Mon, 01 Mar 2004 21:05:25 -0500
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> If an implementation chooses to support compression, then > the implementation MUST support the ZLIB compression > algorithm. > > Russ Something to consider: ZLIB (RFC 1950) and DEFLATE (RFC 1951) are NOT the same thing. I ran into a small bit of specification confusion (thankfully caught by Ned Freed) when my TLS compression draft went through IESG review. It might be worth noting Ned's comments so that rfc2633bis specifies the algorithm you intend: "First of all, it is important to realize that RFC 1950 and RFC 1951 specify two things: (1) A compression scheme and corresponding format called DEFLATE (1951) and (2) A general wrapper format for compressed data called ZLIB (1950). I believe most compression applications simply use the DEFLATE format and don't bother with the extra wrapper and most of our specifications that do this refer to deflate and RFC 1951 rather than zlib and RFC 1950. This document doesn't follow this approach. Rather, it repeatedly calls the compression scheme ZLIB and refers to both of the RFCs. Does this mean this specification actually uses the zlib wrapper? I suspect the answer is no, and if that's indeed the case, the document needs to be clarified in this regard. I suggest referring to the scheme as DEFLATE and removing the reference to RFC 1950 entirely. If, on the other hand, the intent really is to use the zlib wrapper, then the specification is incomplete in that ZLIB allows for multiple compression algorithms, checksumming, and so forth. These various settings would need to be specified in order to have interoperable ZLIB implementations." -Scott-
- WG LAST CALL: draft-ietf-smime-rfc2633bis-07.txt Blake Ramsdell
- Re: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Russ Housley
- Re: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Sean P. Turner
- Re: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Russ Housley
- RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Hollenbeck, Scott
- RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Russ Housley
- Re: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Sean P. Turner
- RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Blake Ramsdell
- RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Blake Ramsdell
- RE: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Russ Housley
- Re: WG LAST CALL: draft-ietf-smime-rfc2633bis-07.… Sean P. Turner