IDNA200x and PKIX chain validation

John C Klensin klensin at jck.com
Thu Mar 27 18:12:21 CET 2008



--On Thursday, 27 March, 2008 10:03 -0700 Paul Hoffman
<phoffman at imc.org> wrote:

> At 12:49 PM -0400 3/27/08, John C Klensin wrote:
>> --On Thursday, 27 March, 2008 09:40 -0700 Paul Hoffman
>> <phoffman at imc.org> wrote:
>> 
>>>  At 4:26 PM +0100 3/27/08, Simon Josefsson wrote:
>>>>  Doesn't this approach lead to, for example, that the
>>>>  outcome of X.509 certificate chain validation will depend
>>>>  on the locale in which the application is running in?
>>> 
>>>  Not at all. The domain names used in chain validation are
>>>  expressed as punycode/A-labels.
>> 
>> And, as I understand it, are generally also in length-string
>> label format, rather than dot-separated domain names.
> 
> Nope, you are wrong about that: the are full FQDNs.
> Fortunately, that's irrelevant for Simon's concern.

Indeed.  And thanks for the clarification -- I must have
misunderstand Sam.

    john





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