author | Goffi <goffi@goffi.org> |
Tue, 07 Apr 2015 12:47:51 +0200 | |
changeset 1669 | 746d94f37a4c |
parent 1668 | 6bdcb1418029 |
child 1670 | 0b1b4b7d5fe0 |
permissions | -rw-r--r-- |
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-- XEP-0356 (Privileged Entity) |
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-- Copyright (C) 2015 Jérôme Poisson |
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-- |
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-- This module is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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-- Some parts come from mod_remote_roster (module by Waqas Hussain and Kim Alvefur, see https://code.google.com/p/prosody-modules/) |
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local jid = require("util/jid") |
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local set = require("util/set") |
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local st = require("util/stanza") |
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local roster_manager = require("core/rostermanager") |
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local user_manager = require("core/usermanager") |
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local hosts = prosody.hosts |
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local full_sessions = prosody.full_sessions; |
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-- the folowing sets are used to forward presence stanza |
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if not prosody._privilege_presence_man_ent then |
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prosody._privilege_presence_man_ent = set.new() |
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end |
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local presence_man_ent = prosody._privilege_presence_man_ent |
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if not prosody._privilege_presence_roster then |
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prosody._privilege_presence_roster = set.new() |
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end |
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local presence_roster = prosody._privilege_presence_roster |
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local _ALLOWED_ROSTER = set.new({'none', 'get', 'set', 'both'}) |
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local _ROSTER_GET_PERM = set.new({'get', 'both'}) |
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local _ROSTER_SET_PERM = set.new({'set', 'both'}) |
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local _ALLOWED_MESSAGE = set.new({'none', 'outgoing'}) |
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local _ALLOWED_PRESENCE = set.new({'none', 'managed_entity', 'roster'}) |
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local _PRESENCE_MANAGED = set.new({'managed_entity', 'roster'}) |
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local _TO_CHECK = {roster=_ALLOWED_ROSTER, message=_ALLOWED_MESSAGE, presence=_ALLOWED_PRESENCE} |
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local _PRIV_ENT_NS = 'urn:xmpp:privilege:1' |
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local _FORWARDED_NS = 'urn:xmpp:forward:0' |
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module:log("debug", "Loading privileged entity module "); |
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--> Permissions management <-- |
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privileges = module:get_option("privileged_entities", {}) |
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function advertise_perm(session, to_jid, perms) |
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-- send <message/> stanza to advertise permissions |
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-- as expained in § 4.2 |
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local message = st.message({to=to_jid}) |
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:tag("privilege", {xmlns=_PRIV_ENT_NS}) |
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for _, perm in pairs({'roster', 'message', 'presence'}) do |
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if perms[perm] then |
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message:tag("perm", {access=perm, type=perms[perm]}):up() |
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end |
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end |
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session.send(message) |
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end |
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function set_presence_perm_set(to_jid, perms) |
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-- fill the global presence sets according to perms |
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if perms.presence == 'managed_entity' then |
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presence_man_ent:add(to_jid) |
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elseif perms.presence == 'roster' then |
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presence_man_ent:add(to_jid) -- roster imply managed_entity |
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presence_roster:add(to_jid) |
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end |
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end |
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function advertise_presences(session, to_jid, perms) |
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-- send presence status for already conencted entities |
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-- as explained in § 7.1 |
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for _, user_session in pairs(full_sessions) do |
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if user_session.presence then |
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if _PRESENCE_MANAGED:contains(perms.presence) then |
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local presence = st.clone(user_session.presence) |
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presence.attr.to = to_jid |
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module:log("debug", "sending current presence for "..tostring(user_session.full_jid)) |
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session.send(presence) |
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end |
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end |
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end |
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end |
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function on_auth(event) |
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-- Check if entity is privileged according to configuration, |
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-- and set session.privileges accordingly |
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local session = event.session |
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local bare_jid = jid.join(session.username, session.host) |
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local ent_priv = privileges[bare_jid] |
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if ent_priv ~= nil then |
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module:log("debug", "Entity is privileged") |
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for perm_type, allowed_values in pairs(_TO_CHECK) do |
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local value = ent_priv[perm_type] |
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if value ~= nil then |
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if not allowed_values:contains(value) then |
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module:log('warn', 'Invalid value for '..perm_type..' privilege: ['..value..']') |
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module:log('warn', 'Setting '..perm_type..' privilege to none') |
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ent_priv[perm_type] = nil |
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end |
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102 |
if value == 'none' then |
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103 |
ent_priv[perm_type] = nil |
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104 |
end |
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105 |
end |
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106 |
end |
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107 |
-- extra checks for presence permission |
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108 |
if ent_priv.permission == 'roster' and not _ROSTER_GET_PERM:contains(session.privileges.roster) then |
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109 |
module:log("warn", "Can't allow roster presence privilege without roster \"get\" privilege") |
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110 |
module:log("warn", "Setting presence permission to none") |
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111 |
end_priv.permission = nil |
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112 |
end |
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113 |
|
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114 |
if session.type == "component" then |
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115 |
-- we send the message stanza only for component |
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116 |
-- it will be sent at first <presence/> for other entities |
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117 |
advertise_perm(session, bare_jid, ent_priv) |
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118 |
set_presence_perm_set(bare_jid, ent_priv) |
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119 |
advertise_presences(session, bare_jid, ent_priv) |
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120 |
end |
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121 |
end |
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122 |
|
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123 |
session.privileges = ent_priv |
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124 |
end |
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125 |
|
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126 |
function on_presence(event) |
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127 |
-- Permission are already checked at this point, |
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128 |
-- we only advertise them to the entity |
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129 |
local session, stanza = event.origin, event.stanza; |
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130 |
if session.privileges then |
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131 |
advertise_perm(session, session.full_jid, session.privileges) |
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132 |
set_presence_perm_set(session.full_jid, session.privileges) |
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133 |
advertise_presences(session, session.full_jid, session.privileges) |
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134 |
end |
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135 |
end |
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136 |
|
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137 |
module:hook('authentication-success', on_auth) |
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|
138 |
module:hook('component-authenticated', on_auth) |
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139 |
module:hook('presence/initial', on_presence) |
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140 |
|
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|
141 |
|
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142 |
--> roster permission <-- |
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143 |
|
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144 |
-- get |
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145 |
module:hook("iq-get/bare/jabber:iq:roster:query", function(event) |
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146 |
local session, stanza = event.origin, event.stanza; |
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147 |
if not stanza.attr.to then |
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148 |
-- we don't want stanzas addressed to /self |
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|
149 |
return; |
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|
150 |
end |
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|
151 |
|
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152 |
if session.privileges and _ROSTER_GET_PERM:contains(session.privileges.roster) then |
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|
153 |
module:log("debug", "Roster get from allowed privileged entity received") |
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154 |
-- following code is adapted from mod_remote_roster |
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155 |
local node, host = jid.split(stanza.attr.to); |
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|
156 |
local roster = roster_manager.load_roster(node, host); |
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|
157 |
|
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158 |
local reply = st.reply(stanza):query("jabber:iq:roster"); |
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|
159 |
for entity_jid, item in pairs(roster) do |
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|
160 |
if entity_jid and entity_jid ~= "pending" then |
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|
161 |
local node, host = jid.split(entity_jid); |
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|
162 |
reply:tag("item", { |
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|
163 |
jid = entity_jid, |
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|
164 |
subscription = item.subscription, |
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|
165 |
ask = item.ask, |
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|
166 |
name = item.name, |
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|
167 |
}); |
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|
168 |
for group in pairs(item.groups) do |
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|
169 |
reply:tag("group"):text(group):up(); |
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|
170 |
end |
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|
171 |
reply:up(); -- move out from item |
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|
172 |
end |
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|
173 |
end |
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|
174 |
-- end of code adapted from mod_remote_roster |
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|
175 |
session.send(reply); |
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|
176 |
else |
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|
177 |
module:log("warn", "Entity "..tostring(session.full_jid).." try to get roster without permission") |
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|
178 |
session.send(st.error_reply(stanza, 'auth', 'forbidden')) |
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|
179 |
end |
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|
180 |
|
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|
181 |
return true |
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|
182 |
end); |
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|
183 |
|
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|
184 |
-- set |
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|
185 |
module:hook("iq-set/bare/jabber:iq:roster:query", function(event) |
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|
186 |
local session, stanza = event.origin, event.stanza; |
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|
187 |
if not stanza.attr.to then |
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|
188 |
-- we don't want stanzas addressed to /self |
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|
189 |
return; |
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|
190 |
end |
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|
191 |
|
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|
192 |
if session.privileges and _ROSTER_SET_PERM:contains(session.privileges.roster) then |
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|
193 |
module:log("debug", "Roster set from allowed privileged entity received") |
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|
194 |
-- following code is adapted from mod_remote_roster |
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|
195 |
local from_node, from_host = jid.split(stanza.attr.to); |
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|
196 |
if not(user_manager.user_exists(from_node, from_host)) then return; end |
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|
197 |
local roster = roster_manager.load_roster(from_node, from_host); |
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|
198 |
if not(roster) then return; end |
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|
199 |
|
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|
200 |
local query = stanza.tags[1]; |
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|
201 |
for i_, item in ipairs(query.tags) do |
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|
202 |
if item.name == "item" |
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|
203 |
and item.attr.xmlns == "jabber:iq:roster" and item.attr.jid |
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|
204 |
-- Protection against overwriting roster.pending, until we move it |
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|
205 |
and item.attr.jid ~= "pending" then |
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|
206 |
|
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|
207 |
local item_jid = jid.prep(item.attr.jid); |
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|
208 |
local node, host, resource = jid.split(item_jid); |
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|
209 |
if not resource then |
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|
210 |
if item_jid ~= stanza.attr.to then -- not self-item_jid |
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|
211 |
if item.attr.subscription == "remove" then |
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212 |
local r_item = roster[item_jid]; |
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213 |
if r_item then |
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|
214 |
local to_bare = node and (node.."@"..host) or host; -- bare jid |
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|
215 |
roster[item_jid] = nil; |
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|
216 |
if roster_manager.save_roster(from_node, from_host, roster) then |
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|
217 |
session.send(st.reply(stanza)); |
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|
218 |
roster_manager.roster_push(from_node, from_host, item_jid); |
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|
219 |
else |
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|
220 |
roster[item_jid] = item; |
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|
221 |
session.send(st.error_reply(stanza, "wait", "internal-server-error", "Unable to save roster")); |
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|
222 |
end |
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|
223 |
else |
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|
224 |
session.send(st.error_reply(stanza, "modify", "item-not-found")); |
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|
225 |
end |
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|
226 |
else |
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|
227 |
local subscription = item.attr.subscription; |
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|
228 |
if subscription ~= "both" and subscription ~= "to" and subscription ~= "from" and subscription ~= "none" then -- TODO error on invalid |
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|
229 |
subscription = roster[item_jid] and roster[item_jid].subscription or "none"; |
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|
230 |
end |
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|
231 |
local r_item = {name = item.attr.name, groups = {}}; |
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|
232 |
if r_item.name == "" then r_item.name = nil; end |
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|
233 |
r_item.subscription = subscription; |
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|
234 |
if subscription ~= "both" and subscription ~= "to" then |
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|
235 |
r_item.ask = roster[item_jid] and roster[item_jid].ask; |
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|
236 |
end |
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|
237 |
for _, child in ipairs(item) do |
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|
238 |
if child.name == "group" then |
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|
239 |
local text = table.concat(child); |
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|
240 |
if text and text ~= "" then |
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|
241 |
r_item.groups[text] = true; |
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|
242 |
end |
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changeset
|
243 |
end |
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changeset
|
244 |
end |
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|
245 |
local olditem = roster[item_jid]; |
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|
246 |
roster[item_jid] = r_item; |
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|
247 |
if roster_manager.save_roster(from_node, from_host, roster) then -- Ok, send success |
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|
248 |
session.send(st.reply(stanza)); |
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|
249 |
-- and push change to all resources |
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|
250 |
roster_manager.roster_push(from_node, from_host, item_jid); |
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|
251 |
else -- Adding to roster failed |
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|
252 |
roster[item_jid] = olditem; |
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|
253 |
session.send(st.error_reply(stanza, "wait", "internal-server-error", "Unable to save roster")); |
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changeset
|
254 |
end |
d1072db4db44
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changeset
|
255 |
end |
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changeset
|
256 |
else -- Trying to add self to roster |
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|
257 |
session.send(st.error_reply(stanza, "cancel", "not-allowed")); |
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|
258 |
end |
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changeset
|
259 |
else -- Invalid JID added to roster |
d1072db4db44
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|
260 |
module:log("warn", "resource: %s , host: %s", tostring(resource), tostring(host)) |
d1072db4db44
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diff
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|
261 |
session.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME what's the correct error? |
d1072db4db44
mod_privilege: implemented roster set privilege
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changeset
|
262 |
end |
d1072db4db44
mod_privilege: implemented roster set privilege
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changeset
|
263 |
else -- Roster set didn't include a single item, or its name wasn't 'item' |
d1072db4db44
mod_privilege: implemented roster set privilege
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changeset
|
264 |
session.send(st.error_reply(stanza, "modify", "bad-request")); |
d1072db4db44
mod_privilege: implemented roster set privilege
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changeset
|
265 |
end |
d1072db4db44
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changeset
|
266 |
end -- for loop end |
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|
267 |
-- end of code adapted from mod_remote_roster |
d1072db4db44
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|
268 |
else -- The permission is not granted |
d1072db4db44
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|
269 |
module:log("warn", "Entity "..tostring(session.full_jid).." try to set roster without permission") |
d1072db4db44
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changeset
|
270 |
session.send(st.error_reply(stanza, 'auth', 'forbidden')) |
d1072db4db44
mod_privilege: implemented roster set privilege
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changeset
|
271 |
end |
d1072db4db44
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changeset
|
272 |
|
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changeset
|
273 |
return true |
1662
1146cb4493a9
mod_privilege: roster get permission implemented
Goffi <goffi@goffi.org>
parents:
1661
diff
changeset
|
274 |
end); |
1665
69aa2b54ba8a
mod_privilege: implemented message privilege
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changeset
|
275 |
|
69aa2b54ba8a
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changeset
|
276 |
|
69aa2b54ba8a
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|
277 |
--> message permission <-- |
69aa2b54ba8a
mod_privilege: implemented message privilege
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changeset
|
278 |
|
69aa2b54ba8a
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changeset
|
279 |
module:hook("message/host", function(event) |
69aa2b54ba8a
mod_privilege: implemented message privilege
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|
280 |
local session, stanza = event.origin, event.stanza; |
69aa2b54ba8a
mod_privilege: implemented message privilege
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|
281 |
local privilege_elt = stanza:get_child('privilege', _PRIV_ENT_NS) |
69aa2b54ba8a
mod_privilege: implemented message privilege
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|
282 |
if privilege_elt==nil then return; end |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
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diff
changeset
|
283 |
if session.privileges and session.privileges.message=="outgoing" then |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
284 |
if #privilege_elt.tags==1 and privilege_elt.tags[1].name == "forwarded" |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
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diff
changeset
|
285 |
and privilege_elt.tags[1].attr.xmlns==_FORWARDED_NS then |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
286 |
local message_elt = privilege_elt.tags[1]:get_child('message', 'jabber:client') |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
287 |
if message_elt ~= nil then |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
288 |
local from_node, from_host, from_resource = jid.split(message_elt.attr.from) |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
289 |
if from_resource == nil and hosts[from_host] then -- we only accept bare jids from one of the server hosts |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
290 |
-- at this point everything should be alright, we can send the message |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
291 |
prosody.core_route_stanza(nil, message_elt) |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
292 |
else -- trying to send a message from a forbidden entity |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
293 |
module:log("warn", "Entity "..tostring(session.full_jid).." try to send a message from "..tostring(message_elt.attr.from)) |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
294 |
session.send(st.error_reply(stanza, 'auth', 'forbidden')) |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
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diff
changeset
|
295 |
end |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
296 |
else -- incorrect message child |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
297 |
session.send(st.error_reply(stanza, "modify", "bad-request", "invalid forwarded <message/> element")); |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
298 |
end |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
299 |
else -- incorrect forwarded child |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
300 |
session.send(st.error_reply(stanza, "modify", "bad-request", "invalid <forwarded/> element")); |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
301 |
end; |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
302 |
else -- The permission is not granted |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
303 |
module:log("warn", "Entity "..tostring(session.full_jid).." try to send message without permission") |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
304 |
session.send(st.error_reply(stanza, 'auth', 'forbidden')) |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
305 |
end |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
306 |
|
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
307 |
return true |
69aa2b54ba8a
mod_privilege: implemented message privilege
Goffi <goffi@goffi.org>
parents:
1664
diff
changeset
|
308 |
end); |
1668
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
309 |
|
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
310 |
|
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
311 |
--> presence permission <-- |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
312 |
|
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
313 |
module:hook("presence/bare", function(event) |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
314 |
if presence_man_ent:empty() then return; end |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
315 |
local session, stanza = event.origin, event.stanza; |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
316 |
if stanza.attr.to then return; end |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
317 |
if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
318 |
for entity in presence_man_ent:items() do |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
319 |
if stanza.attr.from ~= entity then |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
320 |
presence_fwd = st.clone(stanza) |
6bdcb1418029
mod_privilege: implemented "managed_entity" presence
Goffi <goffi@goffi.org>
parents:
1667
diff
changeset
|
321 |
presence_fwd.attr.to = entity |
6bdcb1418029
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module:log("debug", "presence forwarded to "..entity..": "..tostring(presence_fwd)) |
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prosody.core_route_stanza(nil, presence_fwd) |
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end |
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end |
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end |
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end, 150); |