prosody-modules
460f78654864
mod_sasl2_bind2/mod_sasl2_bind2.lua

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mod_sasl2_bind2/mod_sasl2_bind2.lua @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parent 5093:f2dfbcc676a6
child 5180:6361afcda1a3
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rev   line source
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1 local base64 = require "util.encodings".base64;
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2 local id = require "util.id";
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3 local sha1 = require "util.hashes".sha1;
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4 local st = require "util.stanza";
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5
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6 local sm_bind_resource = require "core.sessionmanager".bind_resource;
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7
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8 local xmlns_bind2 = "urn:xmpp:bind:0";
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9 local xmlns_sasl2 = "urn:xmpp:sasl:2";
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10
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11 module:depends("sasl2");
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12
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13 -- Advertise what we can do
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14
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15 module:hook("advertise-sasl-features", function(event)
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16 local bind = st.stanza("bind", { xmlns = xmlns_bind2 });
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17 local inline = st.stanza("inline");
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18 module:fire_event("advertise-bind-features", { origin = event.origin, features = inline });
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19 bind:add_direct_child(inline);
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20
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21 event.features:add_direct_child(bind);
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22 end, 1);
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23
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24 -- Helper to actually bind a resource to a session
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25
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26 local function do_bind(session, bind_request)
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27 local resource;
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28
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29 local client_name_tag = bind_request:get_child_text("tag");
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30 if client_name_tag then
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31 local client_id = session.client_id;
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32 local tag_suffix = client_id and base64.encode(sha1(client_id):sub(1, 9)) or id.medium();
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33 resource = ("%s~%s"):format(client_name_tag, tag_suffix);
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34 end
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35
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36 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
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37 if not success then
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38 session.log("debug", "Resource bind failed: %s", err_msg or err);
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39 return nil, { type = err_type, condition = err, text = err_msg };
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40 end
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41
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42 session.log("debug", "Resource bound: %s", session.full_jid);
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43 return st.stanza("bound", { xmlns = xmlns_bind2 });
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44 end
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46 -- Enable inline features requested by the client
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47
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48 local function enable_features(session, bind_request, bind_result)
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49 module:fire_event("enable-bind-features", {
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50 session = session;
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51 request = bind_request;
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52 result = bind_result;
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53 });
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54 end
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55
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56 -- SASL 2 integration
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57
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58 module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
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59 -- Cache action for future processing (after auth success)
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60 session.sasl2_bind_request = auth:child_with_ns(xmlns_bind2);
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61 end, 100);
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62
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63 module:hook("sasl2/c2s/success", function (event)
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64 local session = event.session;
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65
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66 local bind_request = session.sasl2_bind_request;
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67 if not bind_request then return; end -- No bind requested
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68 session.sasl2_bind_request = nil;
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69
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70 local sm_success = session.sasl2_sm_success;
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71 if sm_success and sm_success.type == "resumed" then
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72 return; -- No need to bind a resource
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73 end
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74
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75 local bind_result, err = do_bind(session, bind_request);
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76 if not bind_result then
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77 bind_result = st.stanza("failed", { xmlns = xmlns_bind2 })
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78 :add_error(err);
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79 else
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80 enable_features(session, bind_request, bind_result);
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81 end
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82
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83 event.success:add_child(bind_result);
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84 end, 100);
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85
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86 -- Inline features
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87
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88 module:hook("advertise-bind-features", function (event)
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89 local features = event.features;
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90 features:tag("feature", { var = "urn:xmpp:carbons:2" }):up();
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91 features:tag("feature", { var = "urn:xmpp:csi:0" }):up();
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92 end);
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93
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94 module:hook("enable-bind-features", function (event)
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95 local session, request = event.session, event.request;
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96
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97 -- Carbons
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98 if request:get_child("enable", "urn:xmpp:carbons:2") then
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99 session.want_carbons = true;
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100 event.result:tag("enabled", { xmlns = "urn:xmpp:carbons:2" }):up();
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101 end
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102
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103 -- CSI
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104 local csi_state_tag = request:child_with_ns("urn:xmpp:csi:0");
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105 if csi_state_tag then
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106 session.state = csi_state_tag.name;
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107 end
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108 end, 10);