EJBCA and next Bull Trustway cryptocard with ECDSA

by Sozet Florent :: Rate this Message:

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Hello,

In France, only one HSM is certified to make "qualified" certificates : the Bull TrustWay CryptoCard.

Bull told us that their next certified TrustWay card will content only SHA256 and ECDSA algorithms, no SHA1 and no RSA.

We need to use this version because we have to use SHA256.

We have questions about the compatibilty of this HSM card with EJBCA, in terms of algorithms.

This is an extract of the EJBCA documentation :

-------------------------------------

- Genarated keys and certificate

When generating a CA in EJBCA up to three keys and certificates are generated:

* A CA signing keypair and certificate

* An encryption keypair, used for encrypting keyrecovery information

* An OCSP signer keypair and certificate

When using ECDSA keys, the CA signing keypair and the OCSP signer keypair will be the ECDSA keytype you select when creating the CA. The CA signing and OCSP signing certificate will be signed using your selected signature algorithm.

The encryption keypair will always be RSA, using 1024 or 2048 bit key length. It uses the key length set in the admin-GUI or 2048 bit by default using the cli. A dummy encryption certificate will be created using SHA1WithRSA.

- Using ECDSA with an HSM

See the section about HSM property parameters to see which keys can be of different sorts. Note that the keyEncryptKey can not be ECDSA, but should be an RSA key. Your HSM must support both ECDSA and RSA keys.

-------------------------------------

As I said before, the next version of the Bull TrustWay card will not support both ECDSA and RSA algo.

Are these 3 keypairs always generated ? used ?

Can we configure EJBCA to not generate/use the RSA keypair, if we don't need key recovery ?

Why the keyEncryptKey can not be ECDSA ?

In previous Key Ceremonies with EJBCA and with Safenet HSM, we have generated only one RSA KeyPair (AC KeyPair) in the HSM.

- Was this same keypair used for OCSP and key recovery ?

- Was additional soft keypairs generated for OCSP and key recovery ?

thank you

best regards,

Florent

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