#  _____                   
# |_   _| __ _____   _____ 
#   | || '__/ _ \ \ / / _ \
#   | || | | (_) \ V /  __/
#   |_||_|  \___/ \_/ \___|
#
# Copyright 2012 Codethink Limited
#
# Rules for when we're running as another user.

# Only 'deny' things which are not allowed.  If you 'allow' then it will allow
# the actual operation, not just fail to deny the fact that it's 'as' someone
# else.

define as_is_admin as_group gitano-admin

# trove-admin members are permitted to run sshkey and whoami on behalf
# of others in order to check users and grant access, providing the target
# user is not part of the gitano-admin group.

define as_is_trove_admin as_group trove-admin
define as_trove_admin_ok allof as_is_trove_admin !is_admin op_self

# You are permitted to do things 'as' others if and only if the caller is
# either a member of the administration group, or else meets the above
# requirements.
define as_is_ok anyof as_is_admin as_trove_admin_ok

# Explicitly deny any impersonation operation which does not meet the above.
deny "You may not run things as another user unless you are an admin" !as_is_ok