It supports renewing X.509 certificates when an RA is configured with stepcas.
This will only work when the renewal uses a token, and it won't work with mTLS.
The audience cannot be properly verified when an RA is used, to avoid this we
will get from the database if an RA was used to issue the initial certificate
and we will accept the renew token.
Fixes#1021 for stepcas
CloudKMS keys signs data using an specific signature algorithm, in RSA keys,
this can be PKCS#1 RSA or RSA-PSS, if the later is used, x509.CreateCertificate
will fail unless the template SignatureCertificate is properly set.
On contrast, AWSKMS RSA keys, are just RSA keys, and can sign with PKCS#1 or
RSA-PSS schemes, so right now the way to enforce one or the other is to used
templates.
This change makes easier the configuration of cloudCAS as it does
not require to configure the root or intermediate certificate
in the ca.json. CloudCAS will get the root certificate using
the configured certificateAuthority.
