Re: [TLS] PR#625: Change alert requirements

Hubert Kario <hkario@redhat.com> Wed, 07 September 2016 17:13 UTC

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From: Hubert Kario <hkario@redhat.com>
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Date: Wed, 07 Sep 2016 19:05:31 +0200
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Subject: Re: [TLS] PR#625: Change alert requirements
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On Monday, 5 September 2016 11:02:57 CEST Eric Rescorla wrote:
> PR: https://github.com/tlswg/tls13-spec/pull/625
> 
> Currently the TLS spec requires implementations to send alerts under various
> fatal conditions. However, many stacks actually don't send alerts

the only popular stack I found that does not seem to send alerts is the 
schannel from Microsoft

F5, FortiOS, OpenSSL, NSS, GnuTLS, Java, mbedTLS, botan, axtls, Go 
implementation of TLS, all send alert messages

> Note that these are to some extent orthogonal changes; even if we decide to
> continue mandating sending alerts, that should be listed in one location not
> scattered around the spec.

In my opinion, putting the information how to handle errors in processing 
given message near the definition of a message makes it easier for 
implementers to implement and makes it less likely that they'll miss error 
handling.

-- 
Regards,
Hubert Kario
Senior Quality Engineer, QE BaseOS Security team
Web: www.cz.redhat.com
Red Hat Czech s.r.o., Purky┼łova 99/71, 612 45, Brno, Czech Republic