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Re: [quicwg/base-drafts] Rework Key Update (#2237)

Mike Bishop <notifications@github.com> Wed, 13 February 2019 17:32 UTC

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Date: Wed, 13 Feb 2019 17:32:42 +0000
From: Mike Bishop <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Rework Key Update (#2237)
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MikeBishop commented on this pull request.



> @@ -5012,6 +5020,44 @@ Reason Phrase:
   This SHOULD be a UTF-8 encoded string {{!RFC3629}}.
 
 
+## KEYS_READY Frame {#frame-keys-ready}
+
+An endpoint sends a KEYS_READY frame (type=0x1e) to signal that it has installed
+keys for reading and writing packets.  Receipt of this frame in a packet
+indicates that all earlier keys can be safely discarded.

@kazuho, but implementations could quite reasonably be skeptical of packets with CONNECTION_CLOSE and wait to see if others arrive.  Injecting a fictitious Initial packet with a broken/different handshake is a much more effective attack.  It's true that 1 RTT is probably plenty of time for an attacker, but I'd prefer to minimize the window anyway.

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