On Thursday, July 23, 2015 10:52:59 pm Andrei Popov wrote:
> Rather than renaming and otherwise modifying the meaning of the existing 
> alerts, would it be better to define new, more granular alerts in 1.3? We 
> can’t ascribe new meanings to alerts generated by the code we’ve shipped in 
> the past.

I'm not proposing changing the meaning of existing alerts. At most, the 
Negotiated FF-DH draft would need to be updated/fixed.

I'm proposing renaming "insufficient_security" to "unsupported_cipher_suites", 
which is explicitly what it's been for since TLS 1.0. There isn't a specific 
error defined for lack of a supported group yet. RFC 4492 just says "fatal 
handshake failure alert". The Negotiated FF-DH draft has 
"insufficient_security" for unsupported group. _That_ does change the meaning, 
as previously it was explicitly defined for cipher issues only. What I want is 
to add a new "unsupported_groups" alert to use instead. (both here and there) 
The "client_authentication_failure" alert suggestion is to pull that out of the 
"handshake_failure" catchall.

I just want to clarify the existing alert, not reuse it for a related but 
distinctly different alert, and not lump stuff into a catchall that we can't 
debug. ;)


Dave

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