Virtual filesystem providers
Bitvise SSH Server supports pluggable filesystem providers. Third parties can implement custom providers to support any type of backing store for files accessed with SFTP or SCP via an SSH session. Possibilities include SFTP/SCP access to files contained in an encrypted database; or a bridge that permits SFTP/SCP access to files actually hosted on an FTP server. Third-party providers can be mounted concurrently with the SSH server's default provider, FlowSfsWin, allowing SSH users to access the Windows filesystem and a third-party provider's virtual filesystem concurrently.
Virtual filesystem providers need to be implemented as 32-bit DLLs with a C-style interface. No licensing or royalty fees are required. To get started, download our Virtual Filesystem Provider Development Kit.
SSH Server Control Panel protocol
Third party programs can interact with Bitvise SSH Server using the same protocol used by the SSH Server Control Panel, and can obtain the same information from the SSH Server that the SSH Server Control Panel displays. Look for BssStat.exe and BssStat.cpp in your SSH Server installation directory for an example command line program that implements the protocol, and its full source code.