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Re: [TLS] [Technical Errata Reported] RFC5246 (4382)

"Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu> Fri, 29 May 2015 17:15 UTC

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From: "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu>
To: "'rsalz@akamai.com'" <rsalz@akamai.com>, "'martin.thomson@gmail.com'" <martin.thomson@gmail.com>
Thread-Topic: [TLS] [Technical Errata Reported] RFC5246 (4382)
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Date: Fri, 29 May 2015 17:15:36 +0000
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Subject: Re: [TLS] [Technical Errata Reported] RFC5246 (4382)
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ASN.1 would be good - as long as there's a reasonably debugged parser/encoder, and a language subset is agreed upon. I'm for it, based on my prior experience with ASN.1 (including implementing it).
 


----- Original Message -----
From: Salz, Rich [mailto:rsalz@akamai.com]
Sent: Friday, May 29, 2015 01:05 PM
To: Martin Thomson <martin.thomson@gmail.com>
Cc: tls@ietf.org <tls@ietf.org>
Subject: Re: [TLS] [Technical Errata Reported] RFC5246 (4382)

> ASN.1 doesn't suffer from this problem.  I wonder if it's worth translating the
> spec to ASN.1 and (probably) PER?

ASN.1 would be interesting, but I don't believe PER is the right thing as we'd end up defining a completely new on-the-wire protocol for TLS 1.3.  Instead you'd have to define something like TER, the TLS Encoding Rules.

FWIW, about a year ago I wrote a parser for the TLS-RFC grammar: https://github.com/richsalz/tlsparser

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