OAEP Certificates


is it possible to request end-entity RSA certificates from Comodo which has a id-RSAES-OAEP key identifier according to RFC 4055? And if so, which parameter combinations for hash and mask and p-source? Will it be enough to request that in a CSR or is this ignored by comodo? Is it part of normal certificataions or does it require specific enterprise agreements?

Any experiences with interop? (for CMS in general not necesarily for E-Mail).