On the password reset form the user supplies current_password, password and password-confirmation. Is there a way to specify in the valida
You can't, bcrypt hashes are unique (they have their own random salt incorporated) so even if you knew the user's plain text password you would't be able do a hash-to-hash comparison.
What you can do is actually check the plain text password against a bcrypt hash by doing Hash::check('plain text password', 'bcrypt hash') on your controller.