-- Prosody IM
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
-- Copyright (C) 2009 Thilo Cestonaro
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local prosody = prosody;
local helpers = require "util/helpers";
local st = require "util.stanza";
local datamanager = require "util.datamanager";
local bare_sessions = bare_sessions;
local util_Jid = require "util.jid";
local jid_bare = util_Jid.bare;
local jid_split = util_Jid.split;
function findNamedList (privacy_lists, name)
local ret = nil
if privacy_lists.lists == nil then
module:log("debug", "no lists loaded.")
return nil;
end
module:log("debug", "searching for list: %s", name);
for i=1, #privacy_lists.lists do
if privacy_lists.lists[i].name == name then
ret = i;
break;
end
end
return ret;
end
function declineList (privacy_lists, origin, stanza, which)
module:log("info", "User requests to decline the use of privacy list: %s", which);
privacy_lists[which] = nil;
origin.send(st.reply(stanza));
return true;
end
function activateList (privacy_lists, origin, stanza, which, name)
module:log("info", "User requests to change the privacy list: %s, to be list named %s", which, name);
local ret = false;
local idx = findNamedList(privacy_lists, name);
if privacy_lists[which] == nil then
privacy_lists[which] = "";
end
if privacy_lists[which] ~= name and idx ~= nil then
privacy_lists[which] = name;
origin.send(st.reply(stanza));
ret = true;
end
return ret;
end
function deleteList (privacy_lists, origin, stanza, name)
module:log("info", "User requests to delete privacy list: %s", name);
local ret = false;
local idx = findNamedList(privacy_lists, name);
if idx ~= nil then
table.remove(privacy_lists.lists, idx);
origin.send(st.reply(stanza));
ret = true;
end
return ret;
end
local function sortByOrder(a, b)
if a.order < b.order then
return true;
end
return false;
end
function createOrReplaceList (privacy_lists, origin, stanza, name, entries)
module:log("info", "User requests to create / replace list named %s, item count: %d", name, #entries);
local ret = true;
local idx = findNamedList(privacy_lists, name);
local bare_jid = origin.username.."@"..origin.host;
if privacy_lists.lists == nil then
privacy_lists.lists = {};
end
if idx == nil then
idx = #privacy_lists.lists + 1;
end
local list = {};
list.name = name;
list.items = {};
for _,item in ipairs(entries) do
tmp = {};
tmp["type"] = item.attr.type;
tmp["value"] = item.attr.value;
tmp["action"] = item.attr.action;
tmp["order"] = item.attr.order;
tmp["presence-in"] = false;
tmp["presence-out"] = false;
tmp["message"] = false;
tmp["iq"] = false;
if #item.tags > 0 then
for _,tag in ipairs(item.tags) do
tmp[tag.name] = true;
end
end
list.items[#list.items + 1] = tmp;
end
table.sort(list, sortByOrder);
privacy_lists.lists[idx] = list;
origin.send(st.reply(stanza));
if bare_sessions[bare_jid] ~= nil then
iq = st.iq ( { type = "set", id="push1" } );
iq:tag ("query", { xmlns = "jabber:iq:privacy" } );
iq:tag ("list", { name = list.name } ):up();
iq:up();
for resource, session in pairs(bare_sessions[bare_jid].sessions) do
iq.attr.to = bare_jid.."/"..resource
session.send(iq);
end
end
return true;
end
function getList(privacy_lists, origin, stanza, name)
module:log("info", "User requests list named: %s", name or "nil");
local ret = false;
local reply = st.reply(stanza);
reply:tag("query", {xmlns="jabber:iq:privacy"});
if name == nil then
reply:tag("active", {name=privacy_lists.active or ""}):up();
reply:tag("default", {name=privacy_lists.default or ""}):up();
if privacy_lists.lists then
for _,list in ipairs(privacy_lists.lists) do
reply:tag("list", {name=list.name}):up();
end
ret = true;
end
else
local idx = findNamedList(privacy_lists, name);
module:log("debug", "list idx: %d", idx or -1);
if idx ~= nil then
list = privacy_lists.lists[idx];
reply = reply:tag("list", {name=list.name});
for _,item in ipairs(list.items) do
reply:tag("item", {type=item.type, value=item.value, action=item.action, order=item.order});
if item["message"] then reply:tag("message"):up(); end
if item["iq"] then reply:tag("iq"):up(); end
if item["presence-in"] then reply:tag("presence-in"):up(); end
if item["presence-out"] then reply:tag("presence-out"):up(); end
reply:up();
end
ret = true;
end
end
if ret then
origin.send(reply);
end
return ret;
end
-- "[tagname]/[target-type]/[payload-namespace]:[payload-tagname]"
module:hook("iq/bare/jabber:iq:privacy:query", function(data)
local origin, stanza = data.origin, data.stanza;
if stanza.attr.to == nil then -- only service requests to own bare JID
local err_reply = nil;
local query = stanza.tags[1]; -- the query element
local valid = false;
local privacy_lists = datamanager.load(origin.username, origin.host, "privacy") or {};
if stanza.attr.type == "set" then
if #query.tags >= 1 then
for _,tag in ipairs(query.tags) do
if tag.name == "active" or tag.name == "default" then
if tag.attr.name == nil then -- Client declines the use of active / default list
valid = declineList(privacy_lists, origin, stanza, tag.name);
else -- Client requests change of active / default list
valid = activateList(privacy_lists, origin, stanza, tag.name, tag.attr.name);
err_reply = st.error_reply(stanza, "cancel", "item-not-found");
end
elseif tag.name == "list" and tag.attr.name then -- Client adds / edits a privacy list
if #tag.tags == 0 then -- Client removes a privacy list
valid = deleteList(privacy_lists, origin, stanza, tag.attr.name);
else -- Client edits a privacy list
valid = createOrReplaceList(privacy_lists, origin, stanza, tag.attr.name, tag.tags)
end
end
end
end
elseif stanza.attr.type == "get" then
local name = nil;
local listsToRetrieve = 0;
if #query.tags >= 1 then
for _,tag in ipairs(query.tags) do
if tag.name == "list" then -- Client requests a privacy list from server
name = tag.attr.name;
listsToRetrieve = listsToRetrieve + 1;
end
end
end
if listsToRetrieve == 0 or listsToRetrieve == 1 then
valid = getList(privacy_lists, origin, stanza, name);
err_reply = st.error_reply(stanza, "cancel", "item-not-found");
end
end
if valid == false then
if err_reply == nil then
err_reply = st.error_reply(stanza, "modify", "bad-request");
end
origin.send(err_reply);
else
datamanager.store(origin.username, origin.host, "privacy", privacy_lists);
end
return true;
end
return false;
end, 500);
function checkIfNeedToBeBlocked(e, node_, host_)
local origin, stanza = e.origin, e.stanza;
local privacy_lists = datamanager.load(node_, host_, "privacy") or {};
local bare_jid = node_.."@"..host_;
module:log("debug", "checkIfNeedToBeBlocked: username: %s, host: %s", node_, host_);
module:log("debug", "stanza: %s, to: %s, form: %s", stanza.name, stanza.attr.to or "nil", stanza.attr.from or "nil");
if privacy_lists.lists ~= nil and stanza.attr.to ~= nil and stanza.attr.from ~= nil then
if privacy_lists.active == nil and privacy_lists.default == nil then
return; -- Nothing to block, default is Allow all
end
local idx;
local list;
local item;
local block = false;
local apply = false;
local listname = privacy_lists.active;
if listname == nil then
listname = privacy_lists.default; -- no active list selected, use default list
end
idx = findNamedList(privacy_lists, listname);
if idx == nil then
module:log("info", "given privacy listname not found.");
return;
end
list = privacy_lists.lists[idx];
if list == nil then
module:log("info", "privacy list index wrong.");
return;
end
for _,item in ipairs(list.items) do
local apply = false;
block = false;
if (stanza.name == "message" and item.message) or
(stanza.name == "iq" and item.iq) or
(stanza.name == "presence" and jid_bare(stanza.attr.to) == bare_jid and item["presence-in"]) or
(stanza.name == "presence" and jid_bare(stanza.attr.from) == bare_jid and item["presence-out"]) or
(item.message == false and item.iq == false and item["presence-in"] == false and item["presence-in"] == false) then
module:log("debug", "stanza type matched.");
apply = true;
end
if apply then
local evilJid = {};
apply = false;
if jid_bare(stanza.attr.to) == bare_jid then
evilJid.node, evilJid.host, evilJid.resource = jid_split(stanza.attr.from);
else
evilJid.node, evilJid.host, evilJid.resource = jid_split(stanza.attr.to);
end
if item.type == "jid" and
(evilJid.node and evilJid.host and evilJid.resource and item.value == evilJid.node.."@"..evilJid.host.."/"..evilJid.resource) or
(evilJid.node and evilJid.host and item.value == evilJid.node.."@"..evilJid.host) or
(evilJid.host and evilJid.resource and item.value == evilJid.host.."/"..evilJid.resource) or
(evilJid.host and item.value == evilJid.host) then
module:log("debug", "jid matched.");
apply = true;
block = (item.action == "deny");
elseif item.type == "group" then
local groups = origin.roster[jid_bare(stanza.from)].groups;
for _,group in ipairs(groups) do
if group == item.value then
module:log("debug", "group matched.");
apply = true;
block = (item.action == "deny");
break;
end
end
elseif item.type == "subscription" then
if origin.roster[jid_bare(stanza.from)].subscription == item.value then
module:log("debug", "subscription matched.");
apply = true;
block = (item.action == "deny");
end
elseif item.type == nil then
module:log("debug", "no item.type, so matched.");
apply = true;
block = (item.action == "deny");
end
end
if apply then
if block then
module:log("info", "stanza blocked: %s, to: %s, from: %s", stanza.name, stanza.attr.to or "nil", stanza.attr.from or "nil");
if stanza.name == "message" then
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
elseif stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
return true; -- stanza blocked !
else
module:log("info", "stanza explicit allowed!")
end
end
end
end
return;
end
function preCheckIncoming(e)
if e.stanza.attr.to ~= nil then
local node, host, resource = jid_split(e.stanza.attr.to);
if node == nil or host == nil then
return;
end
return checkIfNeedToBeBlocked(e, node, host);
end
return;
end
function preCheckOutgoing(e)
if e.stanza.attr.from ~= nil then
local node, host, resource = jid_split(e.stanza.attr.from);
if node == nil or host == nil then
return;
end
return checkIfNeedToBeBlocked(e, node, host);
end
return;
end
module:hook("pre-message/full", preCheckOutgoing, 500);
module:hook("pre-message/bare", preCheckOutgoing, 500);
module:hook("pre-message/host", preCheckOutgoing, 500);
module:hook("pre-iq/full", preCheckOutgoing, 500);
module:hook("pre-iq/bare", preCheckOutgoing, 500);
module:hook("pre-iq/host", preCheckOutgoing, 500);
module:hook("pre-presence/full", preCheckOutgoing, 500);
module:hook("pre-presence/bare", preCheckOutgoing, 500);
module:hook("pre-presence/host", preCheckOutgoing, 500);
module:hook("message/full", preCheckIncoming, 500);
module:hook("message/bare", preCheckIncoming, 500);
module:hook("message/host", preCheckIncoming, 500);
module:hook("iq/full", preCheckIncoming, 500);
module:hook("iq/bare", preCheckIncoming, 500);
module:hook("iq/host", preCheckIncoming, 500);
module:hook("presence/full", preCheckIncoming, 500);
module:hook("presence/bare", preCheckIncoming, 500);
module:hook("presence/host", preCheckIncoming, 500);
-- helpers.log_events(hosts["albastru.de"].events, "albastru.de");
-- helpers.log_events(prosody.events, "*");
module:log("info", "mod_privacy loaded ...");