>       From: owner-openssl-us...@openssl.org On Behalf Of Rick Lopes de
Souza
>       Sent: Tuesday, 30 August, 2011 15:46

>       Another question is: Is there any problem to use a different kind of
key 
> on the request that the Certificate Authority has?

No problem, as long as both algorithms (or all for the chain) 
are supported by the systems using the certificates.
        
>       Does Openssl support ecdsa with sha256 and sha512?
>       Only above of 1.0.0 ?
        
Only 1.0.0 series yes -- at least for generating certs etc.
If you want to use a cert signed ECDSA+SHA2 *for TLS* 
e.g. ECDH-ECDSA-AES256-SHA that was fixed only a few weeks ago
http://marc.info/?l=openssl-users&m=131333015717842&w=2
so you currently need a snapshot or patched version.


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