Nothing for SSH and SNMPv3.
If FTPS is standard FTP over TLS-secured sockets, then it might be possible to update the existing FTP client and server samples to use TLS. There are examples of enabling TLS for POP and SMTP client connections.
The only authentication code that I'm aware of is RADIUS client code that exists as part of the WPA Enterprise libraries. I don't know how easy that would be to re-purpose though.
There are HTTP client and server libraries you can use for "web access", and the Rabbit has a "UserBlock" area of flash used for storing configuration information.
If SSH and SNMPv3 are requirements, you might be better off with an embedded Linux platform such as the Digi CC6 (which I'm not familiar with, so I can't guarantee SSH and SNMPv3 are there by default).