Software / code / prosody-modules
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mod_privilege/mod_privilege.lua @ 5186:fa3059e653fa
mod_http_oauth2: Implement the Implicit flow
Everyone says this is insecure and bad, but it's also the only thing
that makes sense for e.g. pure JavaScript clients, but hey implement
this even more complicated thing instead!
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 02 Mar 2023 22:06:50 +0100 |
| parent | 4994:cce12a660b98 |
| child | 5897:a88c43de648c |
| rev | line source |
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1 -- XEP-0356 (Privileged Entity) |
| 4937 | 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") |
| 4937 | 15 local usermanager_user_exists = require "core.usermanager".user_exists |
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16 local hosts = prosody.hosts |
| 4937 | 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 |
| 4937 | 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} |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 141 |
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142 local function on_auth(event) |
| 4937 | 143 -- Check if entity is privileged according to configuration, |
| 144 -- and set session.privileges accordingly | |
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145 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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 } |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 433 if #tag1 ~= #tag2 then return false; end |
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434 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 459 if presence1.attr.id and presence1.attr.id == presence2.attr.id then return true; end |
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460 |
| 4937 | 461 if #presence1 ~= #presence2 then return false; end |
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462 |
| 4937 | 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 |
| 4937 | 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) |
| 4937 | 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) |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 |
| 4937 | 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 } |
| 4937 | 661 |
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662 module:send_iq(wrapped_iq,newsession) |
| 4937 | 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) |
