Using both user/password and public key with key password with PeopleSoft SFTP Authentication

Hello,

We are implementing SFTP for PeopleSoft attachments in our environment, the SFTP server requires user, userpassword + public key + key password to be used together for authentication, however, PeopleSoft can only do one authentication type, user, userpassword OR public key authentication with key password. Is there a way this can be customized in PeopleSoft side? What we can see in the trace are the built-in functions and the transfer is performed via PSCurlFileTransferSession - is it a peoplecode where we can customize it or is it from the libpscurl64.dll ?

Thank you.