Horde/IMP authentication to Cyrus via client certificates?

[Igor Brezac]

On Thu, 17 Feb 2005, Edward Rudd wrote:

> On Wed, 16 Feb 2005 21:18:07 -0700, Kevin P. Fleming wrote:
>
> [snip]
>>
>> Any thoughts on how difficult it would be to get Cyrus IMAP to accept a
>> client certificate, validate it and automatically "log in" the user once
>> that is done? I'll happily contribute the code back to CMU if I get it
>> working, but I though I'd ask the gurus for their opinions before I
>> tried to tackle it :-)
>

SASL/EXTERNAL is what you want although I have to not tried it.  OpenLDAP 
works great.  In theory, the CN part of the client certitificate subject 
needs to be a valid mailbox.  You can test this with imtest -t 
client_cert_file -m EXTERNAL ....  I assume that you have SSL/TLS working.

Your bigger issue is to find a client that supports SASL/EXTERNAL.  I do 
not believe c-client library (this is what drives IMP/Horde via PHP) 
supports SASL/EXTERNAL, so this is what you need to start hacking.

-- 
Igor
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