Yildirim Zaynal a e'crit :
> Dear all,
>
> Current situation;
> OpenCA version 0.9.2.5
> CA: using private key of 4096 bits..
>
> Issue: Some applications doesnt support 4096 bit keylenghts => want to
> sign certificates with 2048 bit CA key.
>
> Question: I dont want to install another openCA server, and i want to
> use the same database for the certificates so that everything is more
> clean an consistent. Is it possible to change the CA ( the public key
> & private key ) without any problems?
>   
The Certification Authority is the central pole of stability of any 
Public Key infrastructure
So it cannot be changed
Neither the public and private key can be changed
Even the self-signed certificate must be issued for the expected 
duration of the installation
So the only way to get the change you want is to erase the existing CA 
and build a new one from the scratch.
The solution is very severe !!!
In addition care must taken to how to deal with the already issued 
certificate

As an alternative you may imagine to create on the same a new sub-ca 
with a key of the right key length
However since the sub-ca certificate must be signed by the root ca the 
problem of key length then arise when checking the sub-ca certificate


IMHO you should check very carefully if yours applications cannot be 
parametrized so as it recognize the existing key


I hope this helps

Dominique
> Or is it possible to have 2 private keys and choose which one to sign
> with using openCA?
>
> Any comments/ideas are welcome.
>
> Kind regards,
>
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>   


-- 
Dr Dominique LOHEZ
ISEN
41, Bd Vauban
F59046 LILLE
France

Phone : +33 (0)3 20 30 40 71
Email: dominique.lo...@isen.fr


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ahead of the curve. Join us from November 9-12, 2009. Register now!
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