Plugin Request Door & Chest Keys/Lock

Plugin category: Anti-Griefing

Suggested name: Custom Locks?
What I want: A plugin that allows you to locks doors, chests, trap doors etc and add people able to open the locked object. Also a message that's changeable in the config when you try to open the object when you are not added to it. The message will differ depending on the locked object. -(Key part of the plugin)

Ideas for commands:
/lock admin [Bypasses all of the locks]
/lock delete(Or Del) [Removes the lock on the object, Usable by the lock owner and admins.]
/lock add {Playername} [Adds a player to the lock when left clicked]
/lock remove {Playername} [Removes a player from the lock when left clicked]

Ideas for permissions:
lock.admin - All commands available.
lock.player - All commands except /lock admin

When I'd like it by: ASAP.