prosody-modules
cdc29ed803f9
mod_saslauth_muc/mod_saslauth_muc.lua

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mod_saslauth_muc/mod_saslauth_muc.lua @ 2981:cdc29ed803f9

mod_post_msg/README: Remove author, it's in the vcs metadata
author Kim Alvefur <zash@zash.se>
date Wed, 04 Apr 2018 15:35:04 +0200
parent 1426:249c5447fed1
child 3072:926db29176f5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
Waqas Hussain <waqas20@gmail.com>
parents:
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1 --
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2 -- mod_saslauth_muc
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3 -- This module implements http://xmpp.org/extensions/inbox/remote-auth.html for Prosody's MUC component
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4 --
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5 -- In your config:
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6 -- Component "conference.example.com" "muc"
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7 -- modules_enabled = { "saslauth_muc" };
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8 --
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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9 --
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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11 local timeout = 60; -- SASL timeout in seconds
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3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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13 -- various imports
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14 local new_sasl = require "util.sasl".new;
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15 local st = require "util.stanza";
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16 local timer = require "util.timer";
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18 local jid_bare = require "util.jid".bare;
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19 local jid_prep = require "util.jid".prep;
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20 local base64 = require "util.encodings".base64;
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22 local hosts = hosts;
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23 local module = module;
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24 local pairs, next = pairs, next;
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25 local os_time = os.time;
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27 local muc_password = module:require("muc/password");
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29 -- SASL sessions management
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30 local _rooms = {}; -- SASL data
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31 local function get_handler_for(room, jid) return _rooms[room] and _rooms[room][jid]; end
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32 local function remove_handler_for(room, jid) if _rooms[room] then _rooms[room][jid] = nil; end end
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33 local function create_handler_for(room_jid, jid)
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34 _rooms[room_jid] = _rooms[room_jid] or {};
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35 _rooms[room_jid][jid] = new_sasl(module.host, { plain = function(sasl, username, realm)
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36 local muc = hosts[module.host].modules.muc;
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37 local room = muc and muc.get_room_by_jid(room_jid);
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38 local password = room and muc_password.get(room);
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39 local ret = password and true or nil;
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40 return password or "", ret;
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41 end });
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42 _rooms[room_jid][jid].timeout = os_time() + timeout;
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43 return _rooms[room_jid][jid];
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44 end
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45
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46 -- Timer to clear SASL sessions
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47 timer.add_task(timeout, function(now)
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48 for room, handlers in pairs(_rooms) do
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49 for jid, handler in pairs(handlers) do
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50 if handler.timeout <= now then handlers[jid] = nil; end
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51 end
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52 if next(handlers) == nil then _rooms[room] = nil; end
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53 end
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54 return timeout;
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55 end);
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56 function module.unload()
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57 timeout = nil; -- stop timer on unload
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58 end
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59
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60 -- Stanza handlers
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61 -- Don't allow anyone to join room unless they provide the password
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62 module:hook("muc-occupant-pre-join", function(event)
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63 local room, stanza = event.room, event.stanza;
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64 local room_password = muc_password.get(room);
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65 if room_password then -- room has a password
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66 local x = stanza:get_child("x", "http://jabber.org/protocol/muc");
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67 local password = x and x:get_child_text("password", "http://jabber.org/protocol/muc");
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68 if not password then -- no password sent
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69 local sasl_handler = get_handler_for(jid_bare(stanza.attr.to), stanza.attr.from);
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70 if x and sasl_handler and sasl_handler.authorized then -- if already passed SASL
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71 x:reset():tag("password", { xmlns = "http://jabber.org/protocol/muc" }):text(room_password);
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72 else
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73 event.origin.send(st.error_reply(stanza, "auth", "not-authorized")
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74 :tag("sasl-required", { xmlns = "urn:xmpp:errors" }));
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75 return true;
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76 end
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77 end
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78 end
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79 end, -18);
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80
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81 module:hook("iq-get/bare/urn:ietf:params:xml:ns:xmpp-sasl:mechanisms", function(event)
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82 local origin, stanza = event.origin, event.stanza;
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83
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84 local reply = st.reply(stanza):tag("mechanisms", { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' });
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85 for mechanism in pairs(create_handler_for(stanza.attr.to, true):mechanisms()) do
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86 reply:tag("mechanism"):text(mechanism):up();
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87 end
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88 origin.send(reply:up());
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89 return true;
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90 end);
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91
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92 local function build_reply(stanza, status, ret, err_msg)
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93 local reply = st.stanza(status, {xmlns = "urn:ietf:params:xml:ns:xmpp-sasl"});
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94 if status == "challenge" then
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95 reply:text(base64.encode(ret or ""));
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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96 elseif status == "failure" then
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97 reply:tag(ret):up();
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98 if err_msg then reply:tag("text"):text(err_msg); end
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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99 elseif status == "success" then
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100 reply:text(base64.encode(ret or ""));
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101 else
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102 module:log("error", "Unknown sasl status: %s", status);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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103 end
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104 return st.reply(stanza):add_child(reply);
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105 end
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106 local function handle_status(stanza, status)
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107 if status == "failure" then
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108 remove_handler_for(stanza.attr.to, stanza.attr.from);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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109 elseif status == "success" then
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110 get_handler_for(stanza.attr.to, stanza.attr.from).authorized = true;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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111 end
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112 end
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113 local function sasl_process_cdata(session, stanza)
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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114 local text = stanza.tags[1][1];
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115 if text then
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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116 text = base64.decode(text);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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117 if not text then
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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118 remove_handler_for(stanza.attr.to, stanza.attr.from);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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119 session.send(build_reply(stanza, "failure", "incorrect-encoding"));
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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120 return true;
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121 end
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122 end
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123 local status, ret, err_msg = get_handler_for(stanza.attr.to, stanza.attr.from):process(text);
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124 handle_status(stanza, status);
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125 local s = build_reply(stanza, status, ret, err_msg);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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126 session.send(s);
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127 return true;
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128 end
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129
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130 module:hook("iq-set/bare/urn:ietf:params:xml:ns:xmpp-sasl:auth", function(event)
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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131 local session, stanza = event.origin, event.stanza;
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132
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133 if not create_handler_for(stanza.attr.to, stanza.attr.from):select(stanza.tags[1].attr.mechanism) then
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134 remove_handler_for(stanza.attr.to, stanza.attr.from);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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135 session.send(build_reply(stanza, "failure", "invalid-mechanism"));
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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136 return true;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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137 end
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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138 return sasl_process_cdata(session, stanza);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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139 end);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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140 module:hook("iq-set/bare/urn:ietf:params:xml:ns:xmpp-sasl:response", function(event)
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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141 local session, stanza = event.origin, event.stanza;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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142 if not get_handler_for(stanza.attr.to, stanza.attr.from) then
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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143 session.send(build_reply(stanza, "failure", "not-authorized", "Out of order SASL element"));
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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144 return true;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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145 end
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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146 return sasl_process_cdata(session, event.stanza);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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147 end);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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148 module:hook("iq-set/bare/urn:ietf:params:xml:ns:xmpp-sasl:abort", function(event)
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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149 local session, stanza = event.origin, event.stanza;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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150 remove_handler_for(stanza.attr.to, stanza.attr.from);
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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151 session.send(build_reply(stanza, "failure", "aborted"));
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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152 return true;
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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153 end);