On Wednesday 23 September 2009 13:25:09 Victor Duchovni wrote:
> On Wed, Sep 23, 2009 at 11:03:55AM +1000, Daniel Black wrote:
> > Should SSL_set_tlsext_host_name convert the domain name to ACE as per
> > RFC4366 3.1 where it talks about IDNA (RFC 3490)?
> 
> On the wire, domain names are always of the ASCII xn--mumble variety. The
> corresponding Unicode is a matter of user display. Thus, to the extent
> that hostnames are exchanged in SNI, they are ASCII host names. The RFC
> is clear as mud of course. :-(

http://tools.ietf.org/html/draft-ietf-tls-rfc4366-bis-05#section-3 got 
mentioned to me and though it clears it up it misses references to ACE.

> So SSL_set_tlsext_host_name() is a valid ASCII domain name, that may
> encode a Unicode name, but is not directly unicode.

given the number of people/application programmers that will assume UTF-8 is 
valid here is validating characters > x7F worth it?
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