Hi Joe,
although you do not mention a specifc product, looking at the SAP systems as a consumer, at least X.509 based auth will work with most of them if using the HTTPS protocol. For SAML it depends on the product. In both cases you will need a system to create the tokens.
BTW: this is more related to general security than the SAP SSO product. You can find this discussed in the product documentation of the product you want to enable.
Kind regards,
Patrick