[TLS] Alerts & Certs - PR #201

Dave Garrett <davemgarrett@gmail.com> Thu, 16 July 2015 19:47 UTC

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From: Dave Garrett <davemgarrett@gmail.com>
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Date: Thu, 16 Jul 2015 15:47:32 -0400
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Subject: [TLS] Alerts & Certs - PR #201
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I've finished up the WIPs I had been working on for the various discussions we've been having on-list and submitted a PR. There's a lot in there, so review and comments are welcome. Almost all of this has been discussed here at some point to some degree, though across more than a few different threads, and not necessarily in the detail in the PR.

Main points:
* More explicit alert expectations
* Deprecate SHA-1 and allow as fallback only
* Make signature_algorithms & supported_groups extensions mandatory (for applicable cipher suites)
* Shift final decision to abort due to unsupported certificate chain to the client
* Require SNI for application protocols for which it is meaningful (this was discussed a while ago)