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annotate mod_sasl2_bind2/mod_sasl2_bind2.lua @ 5733:b6518a71ca7e

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mod_storage_s3: Implement search for set of IDs This together with the full id range query enables support for urn:xmpp:mam:2#extended in mod_mam
author Kim Alvefur <zash@zash.se>
date Sun, 26 Nov 2023 22:44:01 +0100
parents 6361afcda1a3
children
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1 local base64 = require "util.encodings".base64;
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023f21bfcc08 mod_sasl2_bind2: Generate resource from client tag if provided
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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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f64d834ba744 mod_sasl2, mod_sasl2_bind2: rename event.session -> .origin for consistency
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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 = session.sasl_handler.resource;
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28
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29 if not resource then
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30 local client_name_tag = bind_request:get_child_text("tag");
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31 if client_name_tag then
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32 local client_id = session.client_id;
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33 local tag_suffix = client_id and base64.encode(sha1(client_id):sub(1, 9)) or id.medium();
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34 resource = ("%s~%s"):format(client_name_tag, tag_suffix);
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35 end
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36 end
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37
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38 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
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39 if not success then
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40 session.log("debug", "Resource bind failed: %s", err_msg or err);
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41 return nil, { type = err_type, condition = err, text = err_msg };
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42 end
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43
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44 session.log("debug", "Resource bound: %s", session.full_jid);
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45 return st.stanza("bound", { xmlns = xmlns_bind2 });
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46 end
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47
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48 -- Enable inline features requested by the client
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49
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50 local function enable_features(session, bind_request, bind_result)
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51 module:fire_event("enable-bind-features", {
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52 session = session;
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53 request = bind_request;
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54 result = bind_result;
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55 });
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56 end
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57
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58 -- SASL 2 integration
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59
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60 module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
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61 -- Cache action for future processing (after auth success)
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62 session.sasl2_bind_request = auth:child_with_ns(xmlns_bind2);
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63 end, 100);
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64
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65 module:hook("sasl2/c2s/success", function (event)
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66 local session = event.session;
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67
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68 local bind_request = session.sasl2_bind_request;
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69 if not bind_request then return; end -- No bind requested
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70 session.sasl2_bind_request = nil;
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71
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72 local sm_success = session.sasl2_sm_success;
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73 if sm_success and sm_success.type == "resumed" then
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74 return; -- No need to bind a resource
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75 end
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76
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77 local bind_result, err = do_bind(session, bind_request);
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78 if not bind_result then
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79 bind_result = st.stanza("failed", { xmlns = xmlns_bind2 })
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80 :add_error(err);
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81 else
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82 enable_features(session, bind_request, bind_result);
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83 end
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84
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85 event.success:add_child(bind_result);
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86 end, 100);
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87
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88 -- Inline features
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89
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90 module:hook("advertise-bind-features", function (event)
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91 local features = event.features;
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92 features:tag("feature", { var = "urn:xmpp:carbons:2" }):up();
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93 features:tag("feature", { var = "urn:xmpp:csi:0" }):up();
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94 end);
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95
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96 module:hook("enable-bind-features", function (event)
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97 local session, request = event.session, event.request;
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98
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99 -- Carbons
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100 if request:get_child("enable", "urn:xmpp:carbons:2") then
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101 session.want_carbons = true;
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102 event.result:tag("enabled", { xmlns = "urn:xmpp:carbons:2" }):up();
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103 end
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104
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105 -- CSI
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106 local csi_state_tag = request:child_with_ns("urn:xmpp:csi:0");
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107 if csi_state_tag then
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108 session.state = csi_state_tag.name;
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109 end
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110 end, 10);