prosody-modules
8bfcedd93a72
mod_muc_http_auth/mod_muc_http_auth.lua

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mod_muc_http_auth/mod_muc_http_auth.lua @ 5551:8bfcedd93a72

mod_rest: List all error conditions in OpenAPI spec These are not handled by datamanager but by util.stanza and util.error, so they are not represented in the JSON schema file.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 16:26:33 +0200
parent 4724:b125db92bac6
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rev   line source
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1 local http = require "net.http";
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2 local jid_bare = require "util.jid".bare;
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3 local jid_host = require "util.jid".host;
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4 local jid_node = require "util.jid".node;
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5 local jid_resource = require "util.jid".resource;
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6 local json = require "util.json";
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7 local set = require "util.set";
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8 local st = require "util.stanza";
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9 local urlencode = require "util.http".urlencode;
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10 local wait_for = require "util.async".wait_for;
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11
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12 local authorization_url = module:get_option("muc_http_auth_url", "")
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13 local enabled_for = module:get_option("muc_http_auth_enabled_for", nil)
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14 local disabled_for = module:get_option("muc_http_auth_disabled_for", nil)
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15 local insecure = module:get_option("muc_http_auth_insecure", false) --For development purposes
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16 local authorize_registration = module:get_option("muc_http_auth_authorize_registration", false)
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17 local authorization_header = module:get_option("muc_http_auth_authorization_header", nil)
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18
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19 local options = {method="GET", insecure=insecure}
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20 if authorization_header then
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21 options.headers = {["Authorization"] = authorization_header};
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22 end
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23
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24 local verbs = {presence='join', iq='register'};
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25
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26 local function must_be_authorized(room_node, user_host)
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27 -- If none of these is set, all rooms need authorization
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28 if not enabled_for and not disabled_for then return true; end
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29
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30 if enabled_for then
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31 local enabled_for_host = set.new(enabled_for[user_host] or {});
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32 local enabled_for_all = set.new(enabled_for['all'] or {});
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33 return enabled_for_host:contains(room_node) or enabled_for_all:contains(room_node);
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34
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35 end
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36 if disabled_for then
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37 local disabled_for_host = set.new(disabled_for[user_host] or {});
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38 local disabled_for_all = set.new(disabled_for['all'] or {});
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39 return not disabled_for_host:contains(room_node) and not disabled_for_all:contains(room_node);
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40 end
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41 end
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42
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43 local function handle_success(response)
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44 local body = json.decode(response.body or "") or {}
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45 response = {
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46 err = body.error,
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47 allowed = body.allowed,
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48 code = response.code
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49 }
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50 return {response=response, err=response.err};
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51 end
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52
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53 local function handle_error(err)
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54 return {err=err};
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55 end
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56
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57 local function handle_presence(event)
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58 local stanza = event.stanza;
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59 if stanza.name ~= "iq" and stanza.name ~= "presence" or stanza.attr.type == "unavailable" then return; end
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60
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61 local room, origin = event.room, event.origin;
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62 if (not room) or (not origin) then return; end
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63
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64 local user_bare_jid = jid_bare(stanza.attr.from)
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65 if not must_be_authorized(jid_node(room.jid), jid_host(user_bare_jid)) then
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66 module:log("debug", "Authorization not required for "..jid_node(room.jid).." and "..jid_host(user_bare_jid))
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67 return;
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68 end
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69
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70 local user_nickname = jid_resource(stanza.attr.to);
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71
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72 -- Nickname is mandatory to enter a MUC
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73 if not user_nickname then return; end
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74
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75 local url = authorization_url .. "?userJID=" .. urlencode(user_bare_jid) .."&mucJID=" .. urlencode(room.jid) .. "&nickname=" .. urlencode(user_nickname);
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76
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77 local result = wait_for(http.request(url, options):next(handle_success, handle_error));
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78 local response, err = result.response, result.err;
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79
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80 local verb = verbs[stanza.name];
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81 if not (response and response.allowed) then
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82 -- User is not authorized to join this room
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83 err = (response or {}).err or err
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84 module:log("debug", user_bare_jid .. " is not authorized to " ..verb.. ": " .. room.jid .. " Error: " .. tostring(err));
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85 origin.send(st.error_reply(stanza, "auth", "not-authorized", nil, module.host));
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86 return true;
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87 end
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88
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89 module:log("debug", user_bare_jid .. " is authorized to " .. verb .. ": " .. room.jid);
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90 return;
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91 end
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92
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93 if authorize_registration then
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94 module:hook("muc-register-iq", handle_presence);
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95 end
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96
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97 module:hook("muc-occupant-pre-join", handle_presence);