Mercurial > prosody-modules
annotate mod_privilege/mod_privilege.lua @ 5773:3a7349aa95c7
mod_sasl_ssdp: New module implementing XEP-0474 SASL SCRAM Downgrade Protection
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Tue, 05 Dec 2023 12:39:00 +0000 |
| 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) |