prosody-modules
e7b9bc629ecc
mod_saslauth_muc/mod_saslauth_muc.lua

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mod_saslauth_muc/mod_saslauth_muc.lua @ 4941:e7b9bc629ecc

mod_rest: Add special handling to catch MAM results from remote hosts Makes MAM queries to remote hosts works. As the comment says, MAM results from users' local archives or local MUCs are returned via origin.send() which is provided in the event and thus already worked. Results from remote hosts go via normal stanza routing and events, which need this extra handling to catch. This pattern of iq-set, message+, iq-result is generally limited to MAM. Closest similar thing might be MUC join, but to really handle that you would need the webhook callback mechanism.
author Kim Alvefur <zash@zash.se>
date Mon, 16 May 2022 19:47:09 +0200
parent 3072:926db29176f5
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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 --
3b96bba9f7e5 mod_saslauth_muc: Initial commit. Implements SASL auth for MUC rooms <http://xmpp.org/extensions/inbox/remote-auth.html>.
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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 --
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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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11 local timeout = 60; -- SASL timeout in seconds
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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_from_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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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 ""));
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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
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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);
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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);
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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;
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111 end
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112 end
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113 local function sasl_process_cdata(session, stanza)
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114 local text = stanza.tags[1][1];
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115 if text then
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116 text = base64.decode(text);
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117 if not text then
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118 remove_handler_for(stanza.attr.to, stanza.attr.from);
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119 session.send(build_reply(stanza, "failure", "incorrect-encoding"));
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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);
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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)
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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;
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137 end
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138 return sasl_process_cdata(session, stanza);
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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;
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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;
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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);