Expand rust library for copy files

I created a small crate, about 300 lines of code, for copy files in multi thread.
It works on local filesystem via standard libraries and ssh via ssh2 crate.
When it reads a chunk of bytes it works with functions like:
self.sshfp.as_mut().unwrap().read(buf)
or
self.fp.as_mut().unwrap().read(buf)
And similar on writing.
I need this crate to be extended in order to work on SMB share, both in Linux and Windows.

It must be able to work with different credentials for different shares.
It must use only SAFE code. If other crates are used, detailed instruction must be provided to install.
Winner will be provided:
- source code of crate
- source of a simple program that use the crate