SAN conversion of a move in a position

[xsteve]

I would love to see a way to report the legal moves in a position as SAN.

My use case is entering my chess games using the keyboard. I want to verify the entered move against the possible moves.
The idea is to extract the game from a string like "d4d5c5nf6". The SAN moves would be very useful for this task.

Converting a move like d2d4 to SAN would also be a nice thing. E.g. for .pgn export of a game