Re: CRAM-MD5 with saslauthd

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On 2015-03-12 17:42, Geoff Winkless wrote:
> On 12 March 2015 at 16:04, Vladislav Kurz <vladislav.kurz@xxxxxxxxxxx
> <mailto:vladislav.kurz@xxxxxxxxxxx>>wrote:
> 
>     __
> 
>     On Thursday 12 of March 2015 Ram <ram@xxxxxxxxxxxxx
>     <mailto:ram@xxxxxxxxxxxxx>> wrote:
> 
>      
> 
>     > > You need access to plaintext passwords for CRAM/DIGEST-MD5.
> 
>     > > 
> 
>     > > LDAP and saslauthd do not provide that.
> 
>     > 
> 
>     > How can I use CRAM-MD5 with passwords stored in LDAP (in MD5 format )
> 
>     > then ?
> 
>     > 
> 
>     > I need to disable plain & login methods and cannot store passwords in
> 
>     > plain text too.
> 
>      
> 
>     I'm afraid you are trying to do impossible things. Read more about
>     how cram-md5 works. You can eforce ssl/tls encryption and use
>     plain/login auth.
> 
>  
> The definition of "plain text" doesn't mean that it cannot be stored in
> a retrievable form. You could make a fairly simple patch to retrieve the
> ciphertext from a ROT13 store, as an extreme example :)

AD supports an (AES-based, I think?) "reversible encryption" option for
their LDAP passwords. This might be the sanest venue for this kind of
"feature".

>
> G
> 
> 
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