prosody
c0dae734d3bf
plugins/mod_saslauth.lua

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plugins/mod_saslauth.lua @ 447:c0dae734d3bf

Stopped using the lbase64 library
author Waqas Hussain <waqas20@gmail.com>
date Fri, 28 Nov 2008 00:48:16 +0500
parent 438:193f9dd64f17
child 449:c0a4a1e63d70
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 local st = require "util.stanza";
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3 local sm_bind_resource = require "core.sessionmanager".bind_resource;
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4 local jid
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5 local base64 = require "util.encodings".base64;
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7 local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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8 local t_concat, t_insert = table.concat, table.insert;
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9 local tostring = tostring;
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10 local jid_split = require "util.jid".split
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12 local log = require "util.logger".init("mod_saslauth");
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14 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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15 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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16 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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18 local new_sasl = require "util.sasl".new;
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19
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20 local function build_reply(status, ret, err_msg)
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21 local reply = st.stanza(status, {xmlns = xmlns_sasl});
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22 if status == "challenge" then
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23 reply:text(base64.encode(ret or ""));
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24 elseif status == "failure" then
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25 reply:tag(ret):up();
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26 if err_msg then reply:tag("text"):text(err_msg); end
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27 elseif status == "success" then
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28 reply:text(base64.encode(ret or ""));
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29 else
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30 error("Unknown sasl status: "..status);
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31 end
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32 return reply;
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33 end
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34
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35 local function handle_status(session, status)
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36 if status == "failure" then
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37 session.sasl_handler = nil;
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38 elseif status == "success" then
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39 if not session.sasl_handler.username then error("SASL succeeded but we didn't get a username!"); end -- TODO move this to sessionmanager
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40 sessionmanager.make_authenticated(session, session.sasl_handler.username);
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41 session.sasl_handler = nil;
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42 session:reset_stream();
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43 end
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44 end
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45
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46 local function password_callback(node, host, mechanism)
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47 local password = (datamanager.load(node, host, "accounts") or {}).password; -- FIXME handle hashed passwords
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48 local func = function(x) return x; end;
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49 if password then
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50 if mechanism == "PLAIN" then
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51 return func, password;
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52 elseif mechanism == "DIGEST-MD5" then
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53 return func, require "md5".sum(node..":"..host..":"..password);
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54 end
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55 end
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56 return func, nil;
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57 end
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58
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59 function sasl_handler(session, stanza)
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60 if stanza.name == "auth" then
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61 -- FIXME ignoring duplicates because ejabberd does
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62 session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, password_callback);
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63 elseif not session.sasl_handler then
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64 return; -- FIXME ignoring out of order stanzas because ejabberd does
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65 end
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66 local text = stanza[1];
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67 if text then
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68 text = base64.decode(text);
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69 if not text then
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70 session.sasl_handler = nil;
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71 session.send(build_reply("failure", "incorrect-encoding"));
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72 return;
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73 end
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74 end
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75 local status, ret, err_msg = session.sasl_handler:feed(text);
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76 handle_status(session, status);
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77 local s = build_reply(status, ret, err_msg);
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78 log("debug", "sasl reply: "..tostring(s));
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79 session.send(s);
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80 end
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81
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82 module:add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
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83 module:add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
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84 module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
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85
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86 local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
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87 local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
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88 local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
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89 module:add_event_hook("stream-features",
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90 function (session, features)
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91 if not session.username then
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92 features:tag("mechanisms", mechanisms_attr);
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93 -- TODO: Provide PLAIN only if TLS is active, this is a SHOULD from the introduction of RFC 4616. This behavior could be overridden via configuration but will issuing a warning or so.
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94 features:tag("mechanism"):text("PLAIN"):up();
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95 features:tag("mechanism"):text("DIGEST-MD5"):up();
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96 features:up();
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97 else
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98 features:tag("bind", bind_attr):tag("required"):up():up();
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99 features:tag("session", xmpp_session_attr):up();
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100 end
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101 end);
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102
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103 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
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104 function (session, stanza)
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105 log("debug", "Client tried to bind to a resource");
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106 local resource;
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107 if stanza.attr.type == "set" then
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108 local bind = stanza.tags[1];
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109 if bind and bind.attr.xmlns == xmlns_bind then
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110 resource = bind:child_with_name("resource");
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111 if resource then
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112 resource = resource[1];
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113 end
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114 end
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115 end
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116 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
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117 if not success then
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118 session.send(st.error_reply(stanza, err_type, err, err_msg));
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119 else
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120 session.send(st.reply(stanza)
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121 :tag("bind", { xmlns = xmlns_bind})
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122 :tag("jid"):text(session.full_jid));
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123 end
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124 end);
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125
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126 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
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127 function (session, stanza)
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128 log("debug", "Client tried to bind to a resource");
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129 session.send(st.reply(stanza));
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130 end);