---
labels:
- 'Stage-Alpha'
summary: 'XEP-0356 (Privileged Entity) implementation'
...

Introduction
============

Privileged Entity is an extension which allows entity/component to have
privileged access to server (set/get roster, send message on behalf of
server, access presence informations). It can be used to build services
independently of server (e.g.: PEP service).

Details
=======

You can have all the details by reading the
[XEP-0356](http://xmpp.org/extensions/xep-0356.html).

If you use it with a component, you need to patch
core/mod\_component.lua to fire a new signal. To do it, copy the
following patch in a, for example, /tmp/component.patch file:

``` {.patch}
    diff --git a/plugins/mod_component.lua b/plugins/mod_component.lua
    --- a/plugins/mod_component.lua
    +++ b/plugins/mod_component.lua
    @@ -85,6 +85,7 @@
                    session.type = "component";
                    module:log("info", "External component successfully authenticated");
                    session.send(st.stanza("handshake"));
    +               module:fire_event("component-authenticated", { session = session });
     
                    return true;
            end
```

Then, at the root of prosody, enter:

`patch -p1 < /tmp/component.patch`

Usage
=====

To use the module, like usual add **"privilege"** to your
modules\_enabled. Note that if you use it with a local component, you
also need to activate the module in your component section:

    modules_enabled = {
            [...]
        
            "privilege";
    }

    [...]

    Component "youcomponent.yourdomain.tld"
        component_secret = "yourpassword"
        modules_enabled = {"privilege"}

then specify privileged entities **in your host section** like that:

    VirtualHost "yourdomain.tld"

        privileged_entities = {
            ["romeo@montaigu.lit"] = {
                roster = "get";
                presence = "managed_entity";
            },
            ["juliet@capulet.lit"] = {
                roster = "both";
                message = "outgoing";
                presence = "roster";
            },
        }

Here *romeo@montaigu.lit* can **get** roster of anybody on the host, and
will **have presence for any user** of the host, while
*juliet@capulet.lit* can **get** and **set** a roster, **send messages**
on the behalf of the server, and **access presence of anybody linked to
the host** (not only people on the server, but also people in rosters of
users of the server).

**/! Be extra careful when you give a permission to an entity/component,
it's a powerful access, only do it if you absoly trust the
component/entity, and you know where the software is coming from**

Configuration
=============

All the permissions give access to all accounts of the virtual host.

  -------- ------------------------------------------------ ----------------------
  roster   none *(default)*                                 No access to rosters
  get      Allow **read** access to rosters                 
  set      Allow **write** access to rosters                
  both     Allow **read** and **write** access to rosters   
  -------- ------------------------------------------------ ----------------------

message
-------

  ------------------ ------------------------------------------------------------
  none *(default)*   Can't send message from server
  outgoing           Allow to send message on behalf of server (from bare jids)
  ------------------ ------------------------------------------------------------

presence
--------

  ------------------ ------------------------------------------------------------------------------------------------
  none *(default)*   Do not have extra presence information
  managed\_entity    Receive presence stanzas (except subscriptions) from host users
  roster             Receive all presence stanzas (except subsciptions) from host users and people in their rosters
  ------------------ ------------------------------------------------------------------------------------------------

Compatibility
=============

  ----- ----------------------------------------------------
  dev   Need a patched core/mod\_component.lua (see above)
  0.9   Need a patched core/mod\_component.lua (see above)
  ----- ----------------------------------------------------

Note
====

This module is often used with mod\_delegation (c.f. XEP for more
details)