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annotate mod_http_muc_kick/mod_http_muc_kick.lua @ 5461:06640647d193

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mod_http_oauth2: Fix use of arbitrary ports in loopback redirect URIs Per draft-ietf-oauth-v2-1-08#section-8.4.2 > The authorization server MUST allow any port to be specified at the > time of the request for loopback IP redirect URIs, to accommodate > clients that obtain an available ephemeral port from the operating > system at the time of the request. Uncertain if it should normalize the host part, but it also seems harmless to treat IPv6 and IPv4 the same here. One thing is that "localhost" is NOT RECOMMENDED because it can sometimes be pointed to non-loopback interfaces via DNS or hosts file.
author Kim Alvefur <zash@zash.se>
date Wed, 17 May 2023 13:51:30 +0200
parents e524a97730eb
children
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1 local jid_split = require "util.jid".prepped_split;
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2 local json = require "util.json";
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3
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4 module:depends("http");
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5
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6 local authorization = assert(
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7 module:get_option_string("http_muc_kick_authorization_header", nil),
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8 "http_muc_kick_authorization_header setting is missing, please add it to the Prosody config before using mod_http_muc_kick"
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9 );
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10
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11 local function is_authorized(request)
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12 return request.headers.authorization == authorization;
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13 end
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14
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15 local function check_muc(jid)
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16 local muc_node, host = jid_split(jid);
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17
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18 if not hosts[host] then
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19 return nil, nil, "No such host: "..host;
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20 elseif not hosts[host].modules.muc then
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21 return nil, nil, "Host '"..host.."' is not a MUC service";
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22 end
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23
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24 return muc_node, host;
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25 end
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26
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27 local function get_muc(muc_jid)
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28 local muc_node, host, err = check_muc(muc_jid);
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29 if not muc_node then
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30 return nil, host, err;
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31 end
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32
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33 local muc = prosody.hosts[host].modules.muc.get_room_from_jid(muc_jid);
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34 if not muc then
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35 return nil, host, "No MUC '"..muc_node.."' found for host: "..host;
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36 end
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37
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38 return muc;
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39 end
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40
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41 local function handle_error(response, status_code, error)
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42 response.headers.content_type = "application/json";
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43 response.status_code = status_code;
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44 response:send(json.encode({error = error}));
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45
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46 -- return true to keep the connection open, and prevent other handlers from executing.
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47 -- https://prosody.im/doc/developers/http#return_value
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48 return true;
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49 end
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50
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51 module:provides("http", {
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52 route = {
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53 ["POST"] = function (event)
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54 local request, response = event.request, event.response;
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55
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56 if not is_authorized(request) then
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57 return handle_error(response, 401, "Authorization failed");
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58 end
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59
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60 local body = json.decode(request.body or "") or {};
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61 if not body then
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62 return handle_error(response, 400, "JSON body not found");
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63 end
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64
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65 local nickname, muc_jid, reason = body.nickname, body.muc, body.reason or "";
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66 if not nickname or not muc_jid then
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67 return handle_error(response, 400, "Missing nickname and/or MUC");
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68 end
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69
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70 local muc, _, err = get_muc(muc_jid);
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71 if not muc then
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72 return handle_error(response, 404, "MUC not found: " .. err);
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73 end
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74
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75 local occupant_jid = muc.jid .. "/" .. nickname;
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76
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77 -- Kick user by giving them the "none" role
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78 -- https://xmpp.org/extensions/xep-0045.html#kick
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79 local success, error, condition = muc:set_role(true, occupant_jid, nil, reason);
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80 if not success then
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81 return handle_error(response, 400, "Couldn't kick user: ".. error .. ": " .. condition);
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82 end
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83
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84 -- Kick was successful
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85 return 200;
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86 end;
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87 };
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88 });