-- 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 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;
+local load_roster = require "core.rostermanager".load_roster;
+local to_number = _G.tonumber;
+
+function findNamedList (privacy_lists, name)
+ local ret = nil
+ if privacy_lists.lists == nil then
+ return nil;
+ end
+
+ for i=1, #privacy_lists.lists do
+ if privacy_lists.lists[i].name == name then
+ ret = i;
+ break;
+ end
+ end
+ return ret;
+end
+
+function isListUsed(origin, name, privacy_lists)
+ if bare_sessions[origin.username.."@"..origin.host].sessions ~= nil then
+ for resource, session in pairs(bare_sessions[origin.username.."@"..origin.host].sessions) do
+ if resource ~= origin.resource then
+ if session.activePrivacyList == name then
+ return true;
+ elseif session.activePrivacyList == nil and privacy_lists.default == name then
+ return true;
+ end
+ end
+ end
+ end
+ return false;
+end
+
+function isAnotherSessionUsingDefaultList(origin)
+ local ret = false
+ if bare_sessions[origin.username.."@"..origin.host].sessions ~= nil then
+ for resource, session in pairs(bare_sessions[origin.username.."@"..origin.host].sessions) do
+ if resource ~= origin.resource and session.activePrivacyList == nil then
+ ret = true;
+ break;
+ end
+ end
+ end
+ return ret;
+end
+
+function sendUnavailable(to, from)
+--[[ example unavailable presence stanza
+<presence from="node@host/resource" type="unavailable" to="node@host" >
+ <status>Logged out</status>
+</presence>
+]]--
+ local presence = st.presence({from=from, type="unavailable"})
+ presence:tag("status"):text("Logged out");
+
+ local node, host = jid_bare(to);
+ local bare = node .. "@" .. host;
+
+ if bare_sessions[bare].sessions ~= nil then
+ for resource, session in pairs(bare_sessions[bare].sessions) do
+ presence.attr.to = session.full_jid;
+ module:log("debug", "send unavailable to: %s; from: %s", tostring(presence.attr.to), tostring(presence.attr.from));
+ origin.send(presence);
+ end
+ end
+end
+
+function sendNeededUnavailablePersences(origin, listnameOrItem) -- TODO implement it correctly!
+ if type(listnameOrItem) == "string" then
+ local listname = listnameOrItem;
+ for _,list in ipairs(privacy_lists.lists) do
+ if list.name == listname then
+ for _,item in ipairs(list.items) do
+ sendNeededUnavailablePersences(origin, item);
+ end
+ end
+ end
+ elseif type(listnameOrItem) == "table" then
+ module:log("debug", "got an item, check wether to send unavailable presence stanza or not");
+ local item = listnameOrItem;
+ local serialize = require "util.serialization".serialize;
+
+
+ if item["presence-out"] == true then
+ if item.type == "jid" then
+ sendUnavailable(item.value, origin.full_jid);
+ elseif item.type == "group" then
+ elseif item.type == "subscription" then
+ elseif item.type == nil then
+ end
+ elseif item["presence-in"] == true then
+ if item.type == "jid" then
+ sendUnavailable(origin.full_jid, item.value);
+ elseif item.type == "group" then
+ elseif item.type == "subscription" then
+ elseif item.type == nil then
+ end
+ end
+ else
+ module:log("debug", "got unknown type: %s", type(listnameOrItem));
+ end
+end
+
+function declineList (privacy_lists, origin, stanza, which)
+ if which == "default" then
+ if isAnotherSessionUsingDefaultList(origin) then
+ return { "cancel", "conflict", "Another session is online and using the default list."};
+ end
+ privacy_lists.default = nil;
+ origin.send(st.reply(stanza));
+ elseif which == "active" then
+ origin.activePrivacyList = nil;
+ origin.send(st.reply(stanza));
+ else
+ return {"modify", "bad-request", "Neither default nor active list specifed to decline."};
+ end
+ return true;
+end
+
+function activateList (privacy_lists, origin, stanza, which, name)
+ local idx = findNamedList(privacy_lists, name);
+
+ if privacy_lists.default == nil then
+ privacy_lists.default = "";
+ end
+ if origin.activePrivacyList == nil then
+ origin.activePrivacyList = "";
+ end
+
+ if which == "default" and idx ~= nil then
+ if isAnotherSessionUsingDefaultList(origin) then
+ return {"cancel", "conflict", "Another session is online and using the default list."};
+ end
+ privacy_lists.default = name;
+ origin.send(st.reply(stanza));
+--[[
+ if origin.activePrivacyList == nil then
+ sendNeededUnavailablePersences(origin, name);
+ end
+]]--
+ elseif which == "active" and idx ~= nil then
+ origin.activePrivacyList = name;
+ origin.send(st.reply(stanza));
+ -- sendNeededUnavailablePersences(origin, name);
+ else
+ return {"modify", "bad-request", "Either not active or default given or unknown list name specified."};
+ end
+ return true;
+end
+
+function deleteList (privacy_lists, origin, stanza, name)
+ local idx = findNamedList(privacy_lists, name);
+
+ if idx ~= nil then
+ if isListUsed(origin, name, privacy_lists) then
+ return {"cancel", "conflict", "Another session is online and using the list which should be deleted."};
+ end
+ if privacy_lists.default == name then
+ privacy_lists.default = "";
+ end
+ if origin.activePrivacyList == name then
+ origin.activePrivacyList = "";
+ end
+ table.remove(privacy_lists.lists, idx);
+ origin.send(st.reply(stanza));
+ return true;
+ end
+ return {"modify", "bad-request", "Not existing list specifed to be deleted."};
+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, roster)
+ 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 orderCheck = {};
+ local list = {};
+ list.name = name;
+ list.items = {};
+
+ for _,item in ipairs(entries) do
+ if to_number(item.attr.order) == nil or to_number(item.attr.order) < 0 or orderCheck[item.attr.order] ~= nil then
+ return {"modify", "bad-request", "Order attribute not valid."};
+ end
+
+ if item.attr.type ~= nil and item.attr.type ~= "jid" and item.attr.type ~= "subscription" and item.attr.type ~= "group" then
+ return {"modify", "bad-request", "Type attribute not valid."};
+ end
+
+ local tmp = {};
+ orderCheck[item.attr.order] = true;
+
+ tmp["type"] = item.attr.type;
+ tmp["value"] = item.attr.value;
+ tmp["action"] = item.attr.action;
+ tmp["order"] = to_number(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
+
+ if tmp.type == "group" then
+ local found = false;
+ local roster = load_roster(origin.username, origin.host);
+ for jid,item in pairs(roster) do
+ if item.groups ~= nil then
+ for group in pairs(item.groups) do
+ if group == tmp.value then
+ found = true;
+ break;
+ end
+ end
+ if found == true then
+ break;
+ end
+ end
+ end
+ if found == false then
+ return {"cancel", "item-not-found", "Specifed roster group not existing."};
+ end
+ elseif tmp.type == "subscription" then
+ if tmp.value ~= "both" and
+ tmp.value ~= "to" and
+ tmp.value ~= "from" and
+ tmp.value ~= "none" then
+ return {"cancel", "bad-request", "Subscription value must be both, to, from or none."};
+ end
+ end
+
+ if tmp.action ~= "deny" and tmp.action ~= "allow" then
+ return {"cancel", "bad-request", "Action must be either deny or allow."};
+ end
+
+--[[
+ if (privacy_lists.default == name and origin.activePrivacyList == nil) or origin.activePrivacyList == name then
+ module:log("debug", "calling sendNeededUnavailablePresences!");
+ -- item is valid and list is active, so send needed unavailable stanzas
+ sendNeededUnavailablePersences(origin, tmp);
+ 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
+ else
+ return {"cancel", "bad-request", "internal error."};
+ end
+ return true;
+end
+
+function getList(privacy_lists, origin, stanza, name)
+ local reply = st.reply(stanza);
+ reply:tag("query", {xmlns="jabber:iq:privacy"});
+
+ if name == nil then
+ reply:tag("active", {name=origin.activePrivacyList 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
+ end
+ else
+ local idx = findNamedList(privacy_lists, name);
+ 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
+ else
+ return {"cancel", "item-not-found", "Unknown list specified."};
+ end
+ end
+
+ origin.send(reply);
+ return true;
+end
module:hook("iq/bare/jabber:iq:privacy:query", function(data)
local origin, stanza = data.origin, data.stanza;
- if not stanza.attr.to then -- only service requests to own bare JID
+ if stanza.attr.to == nil then -- only service requests to own bare JID
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
- -- TODO
+ if #query.tags == 1 then -- the <query/> element MUST NOT include more than one child element
+ 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);
+ 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
- if #query.tags == 0 then -- Client requests names of privacy lists from server
- -- TODO
- elseif #query.tags == 1 and query.tags[1].name == "list" then -- Client requests a privacy list from server
- -- TODO
- else
- origin.send(st.error_reply(stanza, "modify", "bad-request"));
+ 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);
+ end
+ end
+
+ if valid ~= true then
+ if valid[0] == nil then
+ valid[0] = "cancel";
+ end
+ if valid[1] == nil then
+ valid[1] = "bad-request";
+ end
+ origin.send(st.error_reply(stanza, valid[0], valid[1], valid[2]));
+ else
+ datamanager.store(origin.username, origin.host, "privacy", privacy_lists);
+ end
+ return true;
+ end
+ return false;
+end, 500);
+
+function checkIfNeedToBeBlocked(e, session)
+ local origin, stanza = e.origin, e.stanza;
+ local privacy_lists = datamanager.load(session.username, session.host, "privacy") or {};
+ local bare_jid = session.username.."@"..session.host;
+
+ module:log("debug", "stanza: %s, to: %s, from: %s", tostring(stanza.name), tostring(stanza.attr.to), tostring(stanza.attr.from));
+
+ if stanza.attr.to ~= nil and stanza.attr.from ~= nil then
+ if privacy_lists.lists == nil or
+ (session.activePrivacyList == nil or session.activePrivacyList == "") and
+ (privacy_lists.default == nil or privacy_lists.default == "")
+ then
+ return; -- Nothing to block, default is Allow all
+ end
+ if jid_bare(stanza.attr.from) == bare_jid and jid_bare(stanza.attr.to) == bare_jid then
+ module:log("debug", "Never block communications from one of a user's resources to another.");
+ return; -- from one of a user's resource to another => HANDS OFF!
+ end
+
+ local idx;
+ local list;
+ local item;
+ local listname = session.activePrivacyList;
+ if listname == nil or listname == "" then
+ listname = privacy_lists.default; -- no active list selected, use default list
+ end
+ idx = findNamedList(privacy_lists, listname);
+ if idx == nil then
+ module:log("error", "given privacy listname not found. name: %s", listname);
+ return;
+ end
+ list = privacy_lists.lists[idx];
+ if list == nil then
+ module:log("info", "privacy list index wrong. index: %d", idx);
+ return;
+ end
+ for _,item in ipairs(list.items) do
+ local apply = false;
+ local 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
+ apply = true;
+ end
+ if apply then
+ local evilJid = {};
+ apply = false;
+ if jid_bare(stanza.attr.to) == bare_jid then
+ module:log("debug", "evil jid is (from): %s", stanza.attr.from);
+ evilJid.node, evilJid.host, evilJid.resource = jid_split(stanza.attr.from);
+ else
+ module:log("debug", "evil jid is (to): %s", stanza.attr.to);
+ 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
+ apply = true;
+ block = (item.action == "deny");
+ elseif item.type == "group" then
+ local roster = load_roster(session.username, session.host);
+ local groups = roster[evilJid.node .. "@" .. evilJid.host].groups;
+ for group in pairs(groups) do
+ if group == item.value then
+ apply = true;
+ block = (item.action == "deny");
+ break;
+ end
+ end
+ elseif item.type == "subscription" and evilJid.node ~= nil and evilJid.host ~= nil then -- we need a valid bare evil jid
+ local roster = load_roster(session.username, session.host);
+ if roster[evilJid.node .. "@" .. evilJid.host].subscription == item.value then
+ apply = true;
+ block = (item.action == "deny");
+ end
+ elseif item.type == nil then
+ apply = true;
+ block = (item.action == "deny");
+ end
+ end
+ if apply then
+ if block then
+ module:log("info", "stanza blocked: %s, to: %s, from: %s", tostring(stanza.name), tostring(stanza.attr.to), tostring(stanza.attr.from));
+ 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!")
+ return;
+ end
end
end
end
-end);
+ return;
+end
+
+function preCheckIncoming(e)
+ local session;
+ 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
+ if resource == nil then
+ local prio = 0;
+ local session_;
+ if bare_sessions[node.."@"..host] ~= nil then
+ for resource, session_ in pairs(bare_sessions[node.."@"..host].sessions) do
+ if session_.priority ~= nil and session_.priority > prio then
+ session = session_;
+ prio = session_.priority;
+ end
+ end
+ end
+ else
+ session = full_sessions[node.."@"..host.."/"..resource];
+ end
+ if session ~= nil then
+ return checkIfNeedToBeBlocked(e, session);
+ else
+ module:log("debug", "preCheckIncoming: Couldn't get session for jid: %s@%s/%s", tostring(node), tostring(host), tostring(resource))
+ end
+ end
+ return;
+end
+
+function preCheckOutgoing(e)
+ local session = e.origin;
+ if e.stanza.attr.from == nil then
+ e.stanza.attr.from = session.username .. "@" .. session.host;
+ if session.resource ~= nil then
+ e.stanza.attr.from = e.stanza.attr.from .. "/" .. session.resource;
+ end
+ end
+ return checkIfNeedToBeBlocked(e, session);
+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);
+
+module:log("info", "mod_privacy loaded ...");
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