Re: Initial comments on draft-ietf-822ext-mime-imb-00
Nathaniel Borenstein <nsb@nsb.fv.com> Mon, 27 June 1994 14:03 UTC
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Date: Mon, 27 Jun 1994 09:03:06 -0400
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From: Nathaniel Borenstein <nsb@nsb.fv.com>
To: Steve Dorner <sdorner@qualcomm.com>
Subject: Re: Initial comments on draft-ietf-822ext-mime-imb-00
Cc: ietf-822@dimacs.rutgers.edu
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Excerpts from info-mime: 26-Jun-94 Re: Initial comments on dra.. Steve Dorner@qualcomm.co (953*) > The ONLY (tiny) check on the integrity of base64 is the number of = signs > on the end. If you allow people just to add a bunch of equal signs, you've > removed even that. And I'm not real happy about allowing random characters > in the middle of things, either. Who needs to do that? Well, as far as I know this is what the spec has always said. > My current procedure is to warn users if these things occur. I have no problem with that. If these things occur, there's almost certainly a mistake somewhere. > content-MD5 is all very well and good, but it assumes the sender is going > to make two passes over the data; once to figure out the checksum and once > to send the data. (One of the nice things about the Mac BinHex format is > that the checksums come at the end, not the beginning.) Yes, it would have been MUCH better to put the checksum at the end of the base64 encoding. However, the design of base64 goes back to the earliest versions of PEM; I'm not sure, but it possibly even pre-dates MD5! It is interesting, however, to put these two threads together. Since everything after the = signs is ignored, we could conceivably define a backwards-compatible extension to base64 in which there *was* a checksum at the end, where older decoders will just ignore it..... This idea intrigues me as an extension & future RFC, but NOT as a last-minute fix to the final standard version of MIME. -- Nathaniel
- Initial comments on draft-ietf-822ext-mime-imb-00 John Gardiner Myers
- Re: Initial comments on draft-ietf-822ext-mime-im… Valdis.Kletnieks
- MIME-Version John Gardiner Myers
- re: Initial comments on draft-ietf-822ext-mime-im… hansen
- MIME-Version John Gardiner Myers
- re: MIME-Version hansen
- Re: MIME-Version John Gardiner Myers
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… John Gardiner Myers
- Re: Initial comments on draft-ietf-822ext-mime-im… Steve Dorner
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Steve Dorner
- Re: Initial comments on draft-ietf-822ext-mime-im… John Gardiner Myers
- PS -- Re: Initial comments on draft-ietf-822ext-m… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Nathaniel Borenstein
- Re: Initial comments on draft-ietf-822ext-mime-im… Masataka Ohta
- Re: Initial comments on draft-ietf-822ext-mime-im… Tim Goodwin