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annotate mod_sasl2_sm/mod_sasl2_sm.lua @ 5929:c094eabdb30f

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mod_ping_muc: Describe the client facing protocol (from XEP-0045)
author Kim Alvefur <zash@zash.se>
date Thu, 11 Jul 2024 15:14:33 +0200
parents 92ce3859df63
children
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1 local st = require "util.stanza";
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2
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3 local mod_smacks = module:depends("smacks");
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4
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5 local xmlns_sasl2 = "urn:xmpp:sasl:2";
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6 local xmlns_sm = "urn:xmpp:sm:3";
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7
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8 module:depends("sasl2");
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9
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10 -- Advertise what we can do
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11
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12 module:hook("advertise-sasl-features", function (event)
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13 local features = event.features;
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14 features:tag("sm", { xmlns = xmlns_sm }):up();
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15 end);
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16
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17 module:hook("advertise-bind-features", function (event)
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18 local features = event.features;
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19 features:tag("feature", { var = xmlns_sm }):up();
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20 end);
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21
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22 module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
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23 -- Cache action for future processing (after auth success)
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24 session.sasl2_sm_request = auth:child_with_ns(xmlns_sm);
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25 end, 100);
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26
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27 -- SASL 2 integration (for resume)
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28
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29 module:hook("sasl2/c2s/success", function (event)
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30 local session = event.session;
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31 local sm_request = session.sasl2_sm_request;
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32 if not sm_request then return; end
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33 session.sasl2_sm_request = nil;
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34 local sm_result;
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35 if sm_request.name ~= "resume" then return; end
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36
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37 local resumed, err = mod_smacks.do_resume(session, sm_request);
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38 if not resumed then
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39 local h = err.context and err.context.h;
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40 sm_result = st.stanza("failed", { xmlns = xmlns_sm, h = h and ("%d"):format(h) or nil })
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41 :add_error(err);
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42 else
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43 event.session = resumed.session; -- Update to resumed session
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44 event.session.sasl2_sm_success = resumed; -- To be called after sending final SASL response
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45 sm_result = st.stanza("resumed", { xmlns = xmlns_sm,
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46 h = ("%d"):format(event.session.handled_stanza_count);
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47 previd = resumed.id; });
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48 end
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49
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50 if sm_result then
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51 event.success:add_child(sm_result);
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52 end
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53 end, 110);
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54
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55 -- Bind 2 integration (for enable)
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56
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57 module:hook("enable-bind-features", function (event)
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58 local sm_enable = event.request:get_child("enable", xmlns_sm);
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59 if not sm_enable then return; end
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60
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61 local sm_result;
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62 local enabled, err = mod_smacks.do_enable(event.session, sm_enable);
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63 if not enabled then
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64 sm_result = st.stanza("failed", { xmlns = xmlns_sm })
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65 :add_error(err);
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66 else
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67 event.session.sasl2_sm_success = enabled; -- To be called after sending final SASL response
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68 sm_result = st.stanza("enabled", {
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69 xmlns = xmlns_sm;
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70 id = enabled.id;
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71 resume = enabled.id and "1" or nil;
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72 max = enabled.resume_max;
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73 });
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74 end
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75 event.result:add_child(sm_result);
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76 end, 100);
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77
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78 -- Finish and/or clean up after SASL 2 completed
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79
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80 module:hook("sasl2/c2s/success", function (event)
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81 -- The authenticate response has already been sent at this point
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82 local success = event.session.sasl2_sm_success;
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83 if success then
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84 success.finish(); -- Finish enable/resume and sync stanzas
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85 end
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86 end, -1100);
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87
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88 module:hook("sasl2/c2s/failure", function (event)
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89 event.session.sasl2_sm_request = nil;
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90 end);