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annotate mod_auto_moved/mod_auto_moved.lua @ 5511:0860497152af

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mod_http_oauth2: Record hash of client_id to allow future verification RFC 6819 section 5.2.2.2 states that refresh tokens MUST be bound to the client. In order to do that, we must record something that can definitely tie the client to the grant. Since the full client_id is so large (why we have this client_subset function), a hash is stored instead.
author Kim Alvefur <zash@zash.se>
date Fri, 02 Jun 2023 10:14:16 +0200
parents f95a1e197a07
children
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1 local id = require "util.id";
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2 local jid = require "util.jid";
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3 local promise = require "util.promise";
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4 local rm = require "core.rostermanager";
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5 local st = require "util.stanza";
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6
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7 local errors = require "util.error".init(module.name, {
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8 ["statement-not-found"] = { type = "cancel", condition = "item-not-found" };
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9 ["statement-mismatch"] = { type = "cancel", condition = "conlict" };
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10 });
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11
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12 module:hook("presence/bare", function (event)
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13 local origin, stanza = event.origin, event.stanza;
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14 if stanza.attr.type ~= "subscribe" then
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15 return; -- We're only interested in subscription requests
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16 end
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17 local moved = stanza:get_child("moved", "urn:xmpp:moved:1");
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18 if not moved then
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19 return; -- We're only interested in stanzas with a moved notification
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20 end
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21
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22 local verification = stanza:get_child("moved-verification", "https://prosody.im/protocol/moved");
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23 if verification then
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24 return; -- We already attempted to verify this stanza
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25 end
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26
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27 module:log("debug", "Received moved notification from %s", stanza.attr.from);
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28
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29 local old_jid = moved:get_child_text("old-jid");
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30 if not old_jid then
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31 return; -- Failed to read old JID
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32 end
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33
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34 local to_user = jid.node(stanza.attr.to);
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35 local new_jid_unverified = jid.bare(stanza.attr.from);
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36
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37 if not rm.is_contact_subscribed(to_user, module.host, old_jid) then
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38 return; -- Old JID was not an existing contact, ignore
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39 end
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40
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41 if rm.is_contact_pending_in(to_user, module.host, new_jid_unverified)
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42 or rm.is_contact_subscribed(to_user, module.host, new_jid_unverified) then
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43 return; -- New JID already subscribed or pending, ignore
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44 end
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45
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46 local moved_statement_query = st.iq({ to = old_jid, type = "get", id = id.short() })
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47 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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48 :tag("items", { node = "urn:xmpp:moved:1" })
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49 :tag("item", { id = "current" }):up()
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50 :up()
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51 :up();
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52 -- TODO: Catch and handle <gone/> errors per note in XEP-0283.
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53 module:send_iq(moved_statement_query):next(function (reply)
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54 module:log("debug", "Statement reply: %s", reply.stanza);
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55 local moved_statement = reply.stanza:find("{http://jabber.org/protocol/pubsub}pubsub/items/{http://jabber.org/protocol/pubsub}item/{urn:xmpp:moved:1}moved");
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56 if not moved_statement then
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57 return promise.reject(errors.new("statement-not-found")); -- No statement found
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58 end
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59
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60 local new_jid = jid.prep(moved_statement:get_child_text("new-jid"));
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61 if new_jid ~= new_jid_unverified then
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62 return promise.reject(errors.new("statement-mismatch")); -- Verification failed; JIDs do not match
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63 end
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64
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65 -- Verified!
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66 module:log("info", "Verified moved notification <%s> -> <%s>", old_jid, new_jid);
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67
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68 -- Add incoming subscription and respond
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69 rm.set_contact_pending_in(to_user, module.host, new_jid);
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70 rm.subscribed(to_user, module.host, new_jid);
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71 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribed" }));
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72 rm.roster_push(to_user, module.host, new_jid);
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73
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74 -- Request outgoing subscription if old JID had one
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75 if rm.is_user_subscribed(to_user, module.host, old_jid) then
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76 module:log("debug", "Requesting subscription to new JID");
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77 rm.set_contact_pending_out(to_user, module.host, new_jid);
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78 module:send(st.presence({ to = new_jid, from = to_user.."@"..module.host, type = "subscribe" }));
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79 end
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80 end):catch(function (err)
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81 module:log("debug", "Failed to verify moved statement for <%s> -> <%s>: %s", old_jid, new_jid_unverified, require "util.serialization".serialize(err, "debug"));
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82 stanza:reset()
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83 :tag("moved-verification", { xmlns = "https://prosody.im/protocol/moved", status = "failed" })
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84 :up();
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85 module:send(stanza, origin);
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86 end);
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87
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88 -- Halt processing of the stanza, for now
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89 return true;
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90 end, 1);