prosody
d6b3f9dbb624
plugins/mod_saslauth.lua

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plugins/mod_saslauth.lua @ 46:d6b3f9dbb624

Resource binding, XMPP sessions (whatever they're for...)
author Matthew Wild <mwild1@gmail.com>
date Sat, 04 Oct 2008 02:15:13 +0100
parent 38:3fdfd6e0cb4e
child 48:d0505310aec5
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1
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2 local st = require "util.stanza";
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3 local send = require "core.sessionmanager".send_to_session;
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4 local sm_bind_resource = require "core.sessionmanager".bind_resource;
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5
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6 local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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7 local t_concat, t_insert = table.concat, table.insert;
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8 local tostring = tostring;
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9
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10 local log = require "util.logger".init("mod_saslauth");
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11
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12 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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13 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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14 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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16 local new_connhandler = require "net.connhandlers".new;
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17 local new_sasl = require "util.sasl".new;
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18
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19 add_handler("c2s_unauthed", "auth",
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20 function (session, stanza)
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21 if not session.sasl_handler then
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22 session.sasl_handler = new_sasl(stanza.attr.mechanism,
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23 function (username, password)
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24 -- onAuth
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25 require "core.usermanager"
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26 if usermanager_validate_credentials(session.host, username, password) then
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27 return true;
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28 end
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29 return false;
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30 end,
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31 function (username)
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32 -- onSuccess
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33 local success, err = sessionmanager.make_authenticated(session, username);
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34 if not success then
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35 sessionmanager.destroy_session(session);
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36 end
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37 session.sasl_handler = nil;
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38 session.connhandler = new_connhandler("xmpp-client", session);
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39 session.notopen = true;
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40 end,
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41 function (reason)
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42 -- onFail
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43 log("debug", "SASL failure, reason: %s", reason);
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44 end,
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45 function (stanza)
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46 -- onWrite
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47 log("debug", "SASL writes: %s", tostring(stanza));
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48 send(session, stanza);
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49 end
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50 );
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51 session.sasl_handler:feed(stanza);
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52 else
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53 error("Client tried to negotiate SASL again", 0);
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54 end
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55
46
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56 end);
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57
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58 add_event_hook("stream-features",
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59 function (session, features)
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60 if not session.username then
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61 t_insert(features, "<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>");
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62 t_insert(features, "<mechanism>PLAIN</mechanism>");
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63 t_insert(features, "</mechanisms>");
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64 else
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65 t_insert(features, "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><required/></bind>");
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66 t_insert(features, "<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>");
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67 end
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68 --send [[<register xmlns="http://jabber.org/features/iq-register"/> ]]
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69 end);
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70
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71 add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
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72 function (session, stanza)
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73 log("debug", "Client tried to bind to a resource");
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74 local resource;
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75 if stanza.attr.type == "set" then
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76 local bind = stanza.tags[1];
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77
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78 if bind and bind.attr.xmlns == xmlns_bind then
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79 resource = bind:child_with_name("resource");
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80 if resource then
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81 resource = resource[1];
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82 end
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83 end
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84 end
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85 local success, err = sm_bind_resource(session, resource);
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86 if not success then
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87 local reply = st.reply(stanza);
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88 reply.attr.type = "error";
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89 if err == "conflict" then
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90 reply:tag("error", { type = "modify" })
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91 :tag("conflict", { xmlns = xmlns_stanzas });
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92 elseif err == "constraint" then
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93 reply:tag("error", { type = "cancel" })
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94 :tag("resource-constraint", { xmlns = xmlns_stanzas });
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95 elseif err == "auth" then
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96 reply:tag("error", { type = "cancel" })
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97 :tag("not-allowed", { xmlns = xmlns_stanzas });
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98 end
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99 send(session, reply);
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100 else
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101 local reply = st.reply(stanza);
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102 reply:tag("bind", { xmlns = xmlns_bind})
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103 :tag("jid"):text(session.full_jid);
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104 send(session, reply);
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105 end
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106 end);
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107
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108 add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
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109 function (session, stanza)
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110 log("debug", "Client tried to bind to a resource");
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111 send(session, st.reply(stanza));
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112 end);