On Mon, Nov 29, 2004, Manfred Faulandt wrote:

> Steve,
> 
> Many thanks for the very competent answer. We noticed the UTF8 encoding 
> but thought about it as a "why not?" matter (and we didn't look into a 
> RFC neither).
> 
> The CA is a Microsoft Shop and Internet Explorer is happy with the 
> certificates they issue. I'll check their site again for somthing like a 
> "name rollover" certificate but as far as I remember they offer nothing 
> - at least not yet - in this direction.
> 
> 

IE might be relying on the keyID in the certificate instead of the DNs: which
is considered a bit naughty...

As regards the comparison. It is possible to handle some of the simpler cases
in OpenSSL such as BMP<->UTF8 and PrintableString<->UTF8. The evil case is
T61<->UTF8 where the T61 is a "real" T61 and not ISO8859-1: it would be a huge
amount of effort and might never be used.

Before today I've only come across one example of a certificate outside
contrived "compliant tests" that didn't pass a binary match. Now I've got
two...

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
Funding needed! Details on homepage.
Homepage: http://www.drh-consultancy.demon.co.uk
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