Mercurial > prosody-modules
annotate mod_privilege/mod_privilege.lua @ 5534:7b4e0c3642bf
mod_firewall: Fix inverted logic of 'FROM FULL JID?'
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 08 Jun 2023 13:04:19 +0100 (18 months ago) |
parents | cce12a660b98 |
children | a88c43de648c |
rev | line source |
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1 -- XEP-0356 (Privileged Entity) |
4913 | 2 -- Copyright (C) 2015-2022 Jérôme Poisson |
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3 -- |
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4 -- This module is MIT/X11 licensed. Please see the |
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5 -- COPYING file in the source package for more information. |
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6 -- |
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7 -- 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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8 |
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9 -- TODO: manage external <presence/> (for "roster" presence permission) when the account with the roster is offline |
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10 |
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11 local jid = require("util.jid") |
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12 local set = require("util.set") |
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13 local st = require("util.stanza") |
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14 local roster_manager = require("core.rostermanager") |
4913 | 15 local usermanager_user_exists = require "core.usermanager".user_exists |
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16 local hosts = prosody.hosts |
4913 | 17 local full_sessions = prosody.full_sessions |
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18 |
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19 local priv_session = module:shared("/*/privilege/session") |
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20 |
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21 if priv_session.connected_cb == nil then |
4913 | 22 -- set used to have connected event listeners |
23 -- which allows a host to react on events from | |
24 -- other hosts | |
25 priv_session.connected_cb = set.new() | |
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26 end |
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27 local connected_cb = priv_session.connected_cb |
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28 |
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29 -- the folowing sets are used to forward presence stanza |
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30 -- the folowing sets are used to forward presence stanza |
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31 local presence_man_ent = set.new() |
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32 local presence_roster = set.new() |
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33 |
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34 local _ALLOWED_ROSTER = set.new({'none', 'get', 'set', 'both'}) |
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35 local _ROSTER_GET_PERM = set.new({'get', 'both'}) |
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36 local _ROSTER_SET_PERM = set.new({'set', 'both'}) |
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37 local _ALLOWED_MESSAGE = set.new({'none', 'outgoing'}) |
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38 local _ALLOWED_PRESENCE = set.new({'none', 'managed_entity', 'roster'}) |
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39 local _PRESENCE_MANAGED = set.new({'managed_entity', 'roster'}) |
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40 local _TO_CHECK = {roster=_ALLOWED_ROSTER, message=_ALLOWED_MESSAGE, presence=_ALLOWED_PRESENCE} |
4913 | 41 local _PRIV_ENT_NS = 'urn:xmpp:privilege:2' |
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42 local _FORWARDED_NS = 'urn:xmpp:forward:0' |
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43 local _MODULE_HOST = module:get_host() |
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44 |
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45 |
4913 | 46 module:log("debug", "Loading privileged entity module ") |
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47 |
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48 |
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49 --> Permissions management <-- |
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50 |
4913 | 51 local config_priv = module:get_option("privileged_entities", {}) |
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52 |
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53 local function get_session_privileges(session, host) |
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54 if not session.privileges then return nil end |
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55 return session.privileges[host] |
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56 end |
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57 |
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58 |
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59 local function advertise_perm(session, to_jid, perms) |
4913 | 60 -- send <message/> stanza to advertise permissions |
61 -- as expained in § 4.2 | |
62 local message = st.message({from=module.host, to=to_jid}) | |
63 :tag("privilege", {xmlns=_PRIV_ENT_NS}) | |
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64 |
4913 | 65 for _, perm in pairs({'roster', 'message', 'presence'}) do |
66 if perms[perm] then | |
67 message:tag("perm", {access=perm, type=perms[perm]}):up() | |
68 end | |
69 end | |
70 local iq_perm = perms["iq"] | |
71 if iq_perm ~= nil then | |
72 message:tag("perm", {access="iq"}) | |
73 for namespace, ns_perm in pairs(iq_perm) do | |
74 local perm_type | |
75 if ns_perm.set and ns_perm.get then | |
76 perm_type = "both" | |
77 elseif ns_perm.set then | |
78 perm_type = "set" | |
79 elseif ns_perm.get then | |
80 perm_type = "get" | |
81 else | |
82 perm_type = nil | |
83 end | |
84 message:tag("namespace", {ns=namespace, type=perm_type}) | |
85 end | |
86 end | |
87 session.send(message) | |
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88 end |
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89 |
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90 local function set_presence_perm_set(to_jid, perms) |
4913 | 91 -- fill the presence sets according to perms |
92 if _PRESENCE_MANAGED:contains(perms.presence) then | |
93 presence_man_ent:add(to_jid) | |
94 end | |
95 if perms.presence == 'roster' then | |
96 presence_roster:add(to_jid) | |
97 end | |
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98 end |
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99 |
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100 local function advertise_presences(session, to_jid, perms) |
4913 | 101 -- send presence status for already connected entities |
102 -- as explained in § 7.1 | |
103 -- people in roster are probed only for active sessions | |
104 -- TODO: manage roster load for inactive sessions | |
105 if not perms.presence then return; end | |
106 local to_probe = {} | |
107 for _, user_session in pairs(full_sessions) do | |
108 if user_session.presence and _PRESENCE_MANAGED:contains(perms.presence) then | |
109 local presence = st.clone(user_session.presence) | |
110 presence.attr.to = to_jid | |
111 module:log("debug", "sending current presence for "..tostring(user_session.full_jid)) | |
112 session.send(presence) | |
113 end | |
114 if perms.presence == "roster" then | |
115 -- we reset the cache to avoid to miss a presence that just changed | |
116 priv_session.last_presence = nil | |
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117 |
4913 | 118 if user_session.roster then |
119 local bare_jid = jid.bare(user_session.full_jid) | |
120 for entity, item in pairs(user_session.roster) do | |
121 if entity~=false and entity~="pending" and (item.subscription=="both" or item.subscription=="to") then | |
122 local _, host = jid.split(entity) | |
123 if not hosts[host] then -- we don't probe jid from hosts we manage | |
124 -- using a table with entity as key avoid probing several time the same one | |
125 to_probe[entity] = bare_jid | |
126 end | |
127 end | |
128 end | |
129 end | |
130 end | |
131 end | |
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132 |
4913 | 133 -- now we probe peoples for "roster" presence permission |
134 for probe_to, probe_from in pairs(to_probe) do | |
135 module:log("debug", "probing presence for %s (on behalf of %s)", tostring(probe_to), tostring(probe_from)) | |
136 local probe = st.presence({from=probe_from, to=probe_to, type="probe"}) | |
137 prosody.core_route_stanza(nil, probe) | |
138 end | |
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139 end |
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140 |
4913 | 141 |
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142 local function on_auth(event) |
4913 | 143 -- Check if entity is privileged according to configuration, |
144 -- and set session.privileges accordingly | |
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145 |
4913 | 146 local session = event.session |
147 local bare_jid = jid.join(session.username, session.host) | |
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148 if not session.privileges then |
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149 session.privileges = {} |
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150 end |
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151 |
4913 | 152 local conf_ent_priv = config_priv[bare_jid] |
153 local ent_priv = {} | |
154 if conf_ent_priv ~= nil then | |
155 module:log("debug", "Entity is privileged") | |
156 for perm_type, allowed_values in pairs(_TO_CHECK) do | |
157 local value = conf_ent_priv[perm_type] | |
158 if value ~= nil then | |
159 if not allowed_values:contains(value) then | |
160 module:log('warn', 'Invalid value for '..perm_type..' privilege: ['..value..']') | |
161 module:log('warn', 'Setting '..perm_type..' privilege to none') | |
162 ent_priv[perm_type] = nil | |
163 elseif value == 'none' then | |
164 ent_priv[perm_type] = nil | |
165 else | |
166 ent_priv[perm_type] = value | |
167 end | |
168 else | |
169 ent_priv[perm_type] = nil | |
170 end | |
171 end | |
172 -- extra checks for presence permission | |
173 if ent_priv.presence == 'roster' and not _ROSTER_GET_PERM:contains(ent_priv.roster) then | |
174 module:log("warn", "Can't allow roster presence privilege without roster \"get\" privilege") | |
175 module:log("warn", "Setting presence permission to none") | |
176 ent_priv.presence = nil | |
177 end | |
178 -- iq permission | |
179 local iq_perm_config = conf_ent_priv["iq"] | |
180 if iq_perm_config ~= nil then | |
181 local iq_perm = {} | |
182 ent_priv["iq"] = iq_perm | |
183 for ns, ns_perm_config in pairs(iq_perm_config) do | |
184 iq_perm[ns] = { | |
185 ["get"] = ns_perm_config == "get" or ns_perm_config == "both", | |
186 ["set"] = ns_perm_config == "set" or ns_perm_config == "both" | |
187 } | |
188 end | |
189 else | |
190 ent_priv["iq"] = nil | |
191 end | |
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192 |
4913 | 193 if session.type == "component" then |
194 -- we send the message stanza only for component | |
195 -- it will be sent at first <presence/> for other entities | |
196 advertise_perm(session, bare_jid, ent_priv) | |
197 set_presence_perm_set(bare_jid, ent_priv) | |
198 advertise_presences(session, bare_jid, ent_priv) | |
199 end | |
200 end | |
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201 |
4913 | 202 session.privileges[_MODULE_HOST] = ent_priv |
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203 end |
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204 |
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205 local function on_presence(event) |
4913 | 206 -- Permission are already checked at this point, |
207 -- we only advertise them to the entity | |
208 local session = event.origin | |
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209 local session_privileges = get_session_privileges(session, _MODULE_HOST) |
4913 | 210 if session_privileges then |
211 advertise_perm(session, session.full_jid, session_privileges) | |
212 set_presence_perm_set(session.full_jid, session_privileges) | |
213 advertise_presences(session, session.full_jid, session_privileges) | |
214 end | |
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215 end |
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216 |
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217 local function on_component_auth(event) |
4913 | 218 -- react to component-authenticated event from this host |
219 -- and call the on_auth methods from all other hosts | |
220 -- needed for the component to get delegations advertising | |
221 for callback in connected_cb:items() do | |
222 callback(event) | |
223 end | |
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224 end |
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225 |
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226 if module:get_host_type() ~= "component" then |
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227 connected_cb:add(on_auth) |
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228 end |
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229 module:hook('authentication-success', on_auth) |
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230 module:hook('component-authenticated', on_component_auth) |
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231 module:hook('presence/initial', on_presence) |
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232 |
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233 |
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234 --> roster permission <-- |
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235 |
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236 -- get |
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237 module:hook("iq-get/bare/jabber:iq:roster:query", function(event) |
4913 | 238 local session, stanza = event.origin, event.stanza |
239 if not stanza.attr.to then | |
240 -- we don't want stanzas addressed to /self | |
241 return | |
242 end | |
243 local node, host = jid.split(stanza.attr.to) | |
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244 local session_privileges = get_session_privileges(session, host) |
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245 |
4913 | 246 if session_privileges and _ROSTER_GET_PERM:contains(session_privileges.roster) then |
247 module:log("debug", "Roster get from allowed privileged entity received") | |
248 -- following code is adapted from mod_remote_roster | |
249 local roster = roster_manager.load_roster(node, host) | |
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250 |
4913 | 251 local reply = st.reply(stanza):query("jabber:iq:roster") |
252 for entity_jid, item in pairs(roster) do | |
253 if entity_jid and entity_jid ~= "pending" then | |
254 reply:tag("item", { | |
255 jid = entity_jid, | |
256 subscription = item.subscription, | |
257 ask = item.ask, | |
258 name = item.name, | |
259 }) | |
260 for group in pairs(item.groups) do | |
261 reply:tag("group"):text(group):up() | |
262 end | |
263 reply:up(); -- move out from item | |
264 end | |
265 end | |
266 -- end of code adapted from mod_remote_roster | |
267 session.send(reply) | |
268 else | |
269 module:log("warn", "Entity "..tostring(session.full_jid).." try to get roster without permission") | |
270 session.send(st.error_reply(stanza, 'auth', 'forbidden')) | |
271 end | |
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272 |
4913 | 273 return true |
274 end) | |
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275 |
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276 -- set |
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277 module:hook("iq-set/bare/jabber:iq:roster:query", function(event) |
4913 | 278 local session, stanza = event.origin, event.stanza |
279 if not stanza.attr.to then | |
280 -- we don't want stanzas addressed to /self | |
281 return | |
282 end | |
283 local from_node, from_host = jid.split(stanza.attr.to) | |
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284 local session_privileges = get_session_privileges(session, from_host) |
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285 |
4913 | 286 if session_privileges and _ROSTER_SET_PERM:contains(session_privileges.roster) then |
287 module:log("debug", "Roster set from allowed privileged entity received") | |
288 -- following code is adapted from mod_remote_roster | |
289 if not(usermanager_user_exists(from_node, from_host)) then return; end | |
290 local roster = roster_manager.load_roster(from_node, from_host) | |
291 if not(roster) then return; end | |
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292 |
4913 | 293 local query = stanza.tags[1] |
294 for _, item in ipairs(query.tags) do | |
295 if item.name == "item" | |
296 and item.attr.xmlns == "jabber:iq:roster" and item.attr.jid | |
297 -- Protection against overwriting roster.pending, until we move it | |
298 and item.attr.jid ~= "pending" then | |
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299 |
4913 | 300 local item_jid = jid.prep(item.attr.jid) |
301 local _, host, resource = jid.split(item_jid) | |
302 if not resource then | |
303 if item_jid ~= stanza.attr.to then -- not self-item_jid | |
304 if item.attr.subscription == "remove" then | |
305 local r_item = roster[item_jid] | |
306 if r_item then | |
307 roster[item_jid] = nil | |
308 if roster_manager.save_roster(from_node, from_host, roster) then | |
309 session.send(st.reply(stanza)) | |
310 roster_manager.roster_push(from_node, from_host, item_jid) | |
311 else | |
312 roster[item_jid] = item | |
313 session.send(st.error_reply(stanza, "wait", "internal-server-error", "Unable to save roster")) | |
314 end | |
315 else | |
316 session.send(st.error_reply(stanza, "modify", "item-not-found")) | |
317 end | |
318 else | |
319 local subscription = item.attr.subscription | |
320 if subscription ~= "both" and subscription ~= "to" and subscription ~= "from" and subscription ~= "none" then -- TODO error on invalid | |
321 subscription = roster[item_jid] and roster[item_jid].subscription or "none" | |
322 end | |
323 local r_item = {name = item.attr.name, groups = {}} | |
324 if r_item.name == "" then r_item.name = nil; end | |
325 r_item.subscription = subscription | |
326 if subscription ~= "both" and subscription ~= "to" then | |
327 r_item.ask = roster[item_jid] and roster[item_jid].ask | |
328 end | |
329 for _, child in ipairs(item) do | |
330 if child.name == "group" then | |
331 local text = table.concat(child) | |
332 if text and text ~= "" then | |
333 r_item.groups[text] = true | |
334 end | |
335 end | |
336 end | |
337 local olditem = roster[item_jid] | |
338 roster[item_jid] = r_item | |
339 if roster_manager.save_roster(from_node, from_host, roster) then -- Ok, send success | |
340 session.send(st.reply(stanza)) | |
341 -- and push change to all resources | |
342 roster_manager.roster_push(from_node, from_host, item_jid) | |
343 else -- Adding to roster failed | |
344 roster[item_jid] = olditem | |
345 session.send(st.error_reply(stanza, "wait", "internal-server-error", "Unable to save roster")) | |
346 end | |
347 end | |
348 else -- Trying to add self to roster | |
349 session.send(st.error_reply(stanza, "cancel", "not-allowed")) | |
350 end | |
351 else -- Invalid JID added to roster | |
352 module:log("warn", "resource: %s , host: %s", tostring(resource), tostring(host)) | |
353 session.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME what's the correct error? | |
354 end | |
355 else -- Roster set didn't include a single item, or its name wasn't 'item' | |
356 session.send(st.error_reply(stanza, "modify", "bad-request")) | |
357 end | |
358 end -- for loop end | |
359 -- end of code adapted from mod_remote_roster | |
360 else -- The permission is not granted | |
361 module:log("warn", "Entity "..tostring(session.full_jid).." try to set roster without permission") | |
362 session.send(st.error_reply(stanza, 'auth', 'forbidden')) | |
363 end | |
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364 |
4913 | 365 return true |
366 end) | |
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367 |
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368 |
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369 --> message permission <-- |
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370 |
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371 local function clean_xmlns(node) |
4913 | 372 -- Recursively remove "jabber:client" attribute from node. |
373 -- In Prosody internal routing, xmlns should not be set. | |
374 -- Keeping xmlns would lead to issues like mod_smacks ignoring the outgoing stanza, | |
375 -- so we remove all xmlns attributes with a value of "jabber:client" | |
376 if node.attr.xmlns == 'jabber:client' then | |
377 for childnode in node:childtags() do | |
378 clean_xmlns(childnode) | |
379 end | |
380 node.attr.xmlns = nil | |
381 end | |
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382 end |
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383 |
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384 module:hook("message/host", function(event) |
4913 | 385 local session, stanza = event.origin, event.stanza |
386 local privilege_elt = stanza:get_child('privilege', _PRIV_ENT_NS) | |
387 if privilege_elt==nil then return; end | |
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388 local _, to_host = jid.split(stanza.attr.to) |
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389 local session_privileges = get_session_privileges(session, to_host) |
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390 |
4913 | 391 if session_privileges and session_privileges.message=="outgoing" then |
392 if #privilege_elt.tags==1 and privilege_elt.tags[1].name == "forwarded" | |
393 and privilege_elt.tags[1].attr.xmlns==_FORWARDED_NS then | |
394 local message_elt = privilege_elt.tags[1]:get_child('message', 'jabber:client') | |
395 if message_elt ~= nil then | |
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396 local username, from_host, from_resource = jid.split(message_elt.attr.from) |
4913 | 397 if from_resource == nil and hosts[from_host] then -- we only accept bare jids from one of the server hosts |
398 clean_xmlns(message_elt); -- needed do to proper routing | |
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399 local session = { |
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400 username = username; |
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401 host = from_host; |
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402 type = "c2s"; |
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403 log = module._log; |
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404 } |
4913 | 405 -- at this point everything should be alright, we can send the message |
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406 prosody.core_post_stanza(session, message_elt, true) |
4913 | 407 else -- trying to send a message from a forbidden entity |
408 module:log("warn", "Entity "..tostring(session.full_jid).." try to send a message from "..tostring(message_elt.attr.from)) | |
409 session.send(st.error_reply(stanza, 'auth', 'forbidden')) | |
410 end | |
411 else -- incorrect message child | |
412 session.send(st.error_reply(stanza, "modify", "bad-request", "invalid forwarded <message/> element")) | |
413 end | |
414 else -- incorrect forwarded child | |
415 session.send(st.error_reply(stanza, "modify", "bad-request", "invalid <forwarded/> element")) | |
416 end | |
417 else -- The permission is not granted | |
418 module:log("warn", "Entity "..tostring(session.full_jid).." try to send message without permission") | |
419 session.send(st.error_reply(stanza, 'auth', 'forbidden')) | |
420 end | |
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421 |
4913 | 422 return true |
423 end) | |
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424 |
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425 |
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426 --> presence permission <-- |
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427 |
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428 local function same_tags(tag1, tag2) |
4913 | 429 -- check if two tags are equivalent |
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430 |
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431 if tag1.name ~= tag2.name then return false; end |
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432 |
4913 | 433 if #tag1 ~= #tag2 then return false; end |
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434 |
4913 | 435 for name, value in pairs(tag1.attr) do |
436 if tag2.attr[name] ~= value then return false; end | |
437 end | |
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438 |
4913 | 439 for i=1,#tag1 do |
440 if type(tag1[i]) == "string" then | |
441 if tag1[i] ~= tag2[i] then return false; end | |
442 else | |
443 if not same_tags(tag1[i], tag2[i]) then return false; end | |
444 end | |
445 end | |
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446 |
4913 | 447 return true |
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448 end |
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449 |
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450 local function same_presences(presence1, presence2) |
4913 | 451 -- check that 2 <presence/> stanzas are equivalent (except for "to" attribute) |
452 -- /!\ if the id change but everything else is equivalent, this method return false | |
453 -- this behaviour may change in the future | |
454 if presence1.attr.from ~= presence2.attr.from or presence1.attr.id ~= presence2.attr.id | |
455 or presence1.attr.type ~= presence2.attr.type then | |
456 return false | |
457 end | |
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458 |
4913 | 459 if presence1.attr.id and presence1.attr.id == presence2.attr.id then return true; end |
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460 |
4913 | 461 if #presence1 ~= #presence2 then return false; end |
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462 |
4913 | 463 for i=1,#presence1 do |
464 if type(presence1[i]) == "string" then | |
465 if presence1[i] ~= presence2[i] then return false; end | |
466 else | |
467 if not same_tags(presence1[i], presence2[i]) then return false; end | |
468 end | |
469 end | |
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470 |
4913 | 471 return true |
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472 end |
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473 |
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474 local function forward_presence(presence, to_jid) |
4913 | 475 local presence_fwd = st.clone(presence) |
476 presence_fwd.attr.to = to_jid | |
477 module:log("debug", "presence forwarded to "..to_jid..": "..tostring(presence_fwd)) | |
478 module:send(presence_fwd) | |
479 -- cache used to avoid to send several times the same stanza | |
480 priv_session.last_presence = presence | |
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481 end |
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482 |
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483 module:hook("presence/bare", function(event) |
4913 | 484 if presence_man_ent:empty() and presence_roster:empty() then return; end |
485 | |
486 local stanza = event.stanza | |
487 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then | |
488 if not stanza.attr.to then | |
489 for entity in presence_man_ent:items() do | |
490 if stanza.attr.from ~= entity then forward_presence(stanza, entity); end | |
491 end | |
492 else -- directed presence | |
493 -- we ignore directed presences from our own host, as we already have them | |
494 local _, from_host = jid.split(stanza.attr.from) | |
495 if hosts[from_host] then return; end | |
496 | |
497 -- we don't send several time the same presence, as recommended in §7 #2 | |
498 if priv_session.last_presence and same_presences(priv_session.last_presence, stanza) then | |
499 return | |
500 end | |
501 | |
502 for entity in presence_roster:items() do | |
503 if stanza.attr.from ~= entity then forward_presence(stanza, entity); end | |
504 end | |
505 end | |
506 end | |
507 end, 150) | |
508 | |
509 --> IQ permission <-- | |
510 | |
511 module:hook("iq/bare/".._PRIV_ENT_NS..":privileged_iq", function(event) | |
512 local session, stanza = event.origin, event.stanza | |
513 if not stanza.attr.to then | |
514 -- we don't want stanzas addressed to /self | |
515 return | |
516 end | |
517 local from_node, from_host, from_resource = jid.split(stanza.attr.to) | |
518 | |
519 if from_resource ~= nil or not usermanager_user_exists(from_node, from_host) then | |
520 session.send( | |
521 st.error_reply( | |
522 stanza, | |
523 "auth", | |
524 "forbidden", | |
525 "wrapping <IQ> stanza recipient must be a bare JID of a local user" | |
526 ) | |
527 ) | |
528 return true | |
529 end | |
530 | |
531 local session_privileges = get_session_privileges(session, from_host) | |
532 | |
533 if session_privileges == nil then | |
534 session.send( | |
535 st.error_reply( | |
536 stanza, | |
537 "auth", | |
538 "forbidden", | |
539 "no privilege granted" | |
540 ) | |
541 ) | |
542 return true | |
543 end | |
544 | |
545 local iq_privileges = session_privileges["iq"] | |
546 if iq_privileges == nil then | |
547 session.send( | |
548 session.send(st.error_reply(stanza, "auth", "forbidden", "you are not allowed to send privileged <IQ> stanzas")) | |
549 ) | |
550 return true | |
551 end | |
552 | |
553 local privileged_iq = stanza:get_child("privileged_iq", _PRIV_ENT_NS) | |
554 | |
555 local wrapped_iq = privileged_iq.tags[1] | |
556 if wrapped_iq == nil then | |
557 session.send( | |
558 st.error_reply(stanza, "auth", "forbidden", "missing <IQ> stanza to send") | |
559 ) | |
560 return true | |
561 end | |
562 | |
563 if wrapped_iq.attr.xmlns ~= "jabber:client" then | |
564 session.send( | |
565 st.error_reply( | |
566 stanza, | |
567 "auth", | |
568 "forbidden", | |
569 'wrapped <IQ> must have a xmlns of "jabber:client"' | |
570 ) | |
571 ) | |
572 return true | |
573 end | |
574 | |
575 clean_xmlns(wrapped_iq) | |
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576 |
4913 | 577 if #wrapped_iq.tags ~= 1 then |
578 session.send( | |
579 st.error_reply( | |
580 stanza, | |
581 "auth", | |
582 "forbidden", | |
583 'invalid payload in wrapped <IQ>' | |
584 ) | |
585 ) | |
586 return true | |
587 end | |
588 | |
589 local payload = wrapped_iq.tags[1] | |
590 | |
591 local priv_ns = payload.attr.xmlns | |
592 if priv_ns == nil then | |
593 session.send( | |
594 st.error_reply(stanza, "auth", "forbidden", "xmlns not set in privileged <IQ>") | |
595 ) | |
596 return true | |
597 end | |
598 | |
599 local ns_perms = iq_privileges[priv_ns] | |
600 local iq_type = stanza.attr.type | |
601 if ns_perms == nil or iq_type == nil or not ns_perms[iq_type] then | |
602 session.send( | |
603 session.send(st.error_reply( | |
604 stanza, | |
605 "auth", | |
606 "forbidden", | |
607 "you are not allowed to send privileged <IQ> stanzas of this type and namespace") | |
608 ) | |
609 ) | |
610 return true | |
611 end | |
612 | |
613 if wrapped_iq.attr.from ~= nil and wrapped_iq.attr.from ~= stanza.attr.to then | |
614 session.send( | |
615 st.error_reply( | |
616 stanza, | |
617 "auth", | |
618 "forbidden", | |
619 'wrapped <IQ> "from" attribute is inconsistent with main <IQ> "to" attribute' | |
620 ) | |
621 ) | |
622 return true | |
623 end | |
624 | |
625 wrapped_iq.attr.from = stanza.attr.to | |
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626 |
4913 | 627 |
628 if wrapped_iq.attr.type ~= iq_type then | |
629 session.send( | |
630 st.error_reply( | |
631 stanza, | |
632 "auth", | |
633 "forbidden", | |
634 'invalid wrapped <IQ>: type mismatch' | |
635 ) | |
636 ) | |
637 return true | |
638 end | |
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639 |
4913 | 640 if wrapped_iq.attr.id == nil then |
641 session.send( | |
642 st.error_reply( | |
643 stanza, | |
644 "auth", | |
645 "forbidden", | |
646 'invalid wrapped <IQ>: missing "id" attribute' | |
647 ) | |
648 ) | |
649 return true | |
650 end | |
651 | |
652 -- at this point, wrapped_iq is considered valid, and privileged entity is allowed to send it | |
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653 local username, from_host, _ = jid.split(wrapped_iq.attr.from) |
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654 local newsession = { |
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655 username = username; |
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656 host = from_host; |
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657 full_jid = stanza.attr.to; |
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658 type = "c2s"; |
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659 log = module._log; |
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660 } |
4913 | 661 |
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662 module:send_iq(wrapped_iq,newsession) |
4913 | 663 :next(function (response) |
664 local reply = st.reply(stanza); | |
665 response.stanza.attr.xmlns = 'jabber:client' | |
666 reply:tag("privilege", {xmlns = _PRIV_ENT_NS}) | |
667 :tag("forwarded", {xmlns = _FORWARDED_NS}) | |
668 :add_child(response.stanza) | |
669 session.send(reply) | |
670 end, | |
671 function(response) | |
672 module:log("error", "Error while sending privileged <IQ>: %s", response); | |
673 session.send( | |
674 st.error_reply( | |
675 stanza, | |
676 "cancel", | |
677 "internal-server-error" | |
678 ) | |
679 ) | |
680 end) | |
681 | |
682 return true | |
683 end) |