OSSL_CMP_ITAV_new_rootCaKeyUpdate
rsp = OSSL_CMP_ITAV_new_rootCaKeyUpdate(NULL, NULL, NULL);
rsp = OSSL_CMP_ITAV_new_rootCaKeyUpdate(ctx->newWithNew,
OSSL_CMP_ITAV *OSSL_CMP_ITAV_new_rootCaKeyUpdate(const X509 *newWithNew,