prosody
86e77b6ba579
plugins/mod_saslauth.lua

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plugins/mod_saslauth.lua @ 487:86e77b6ba579

Automated merge.
author Tobias Markmann <tm@ayena.de>
date Sat, 29 Nov 2008 20:33:14 +0100
parent 449:c0a4a1e63d70
child 519:cccd610a0ef9
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38
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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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11 local md5 = require "util.hashes".md5;
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13 local log = require "util.logger".init("mod_saslauth");
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14
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15 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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16 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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17 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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18
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19 local new_sasl = require "util.sasl".new;
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20
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21 local function build_reply(status, ret, err_msg)
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22 local reply = st.stanza(status, {xmlns = xmlns_sasl});
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23 if status == "challenge" then
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24 reply:text(base64.encode(ret or ""));
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25 elseif status == "failure" then
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26 reply:tag(ret):up();
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27 if err_msg then reply:tag("text"):text(err_msg); end
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28 elseif status == "success" then
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29 reply:text(base64.encode(ret or ""));
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30 else
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31 error("Unknown sasl status: "..status);
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32 end
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33 return reply;
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34 end
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35
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36 local function handle_status(session, status)
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37 if status == "failure" then
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38 session.sasl_handler = nil;
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39 elseif status == "success" then
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40 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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41 sessionmanager.make_authenticated(session, session.sasl_handler.username);
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42 session.sasl_handler = nil;
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43 session:reset_stream();
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44 end
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45 end
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46
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47 local function password_callback(node, host, mechanism)
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48 local password = (datamanager.load(node, host, "accounts") or {}).password; -- FIXME handle hashed passwords
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49 local func = function(x) return x; end;
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50 if password then
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51 if mechanism == "PLAIN" then
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52 return func, password;
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53 elseif mechanism == "DIGEST-MD5" then
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54 return func, md5(node..":"..host..":"..password);
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55 end
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56 end
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57 return func, nil;
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58 end
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59
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60 function sasl_handler(session, stanza)
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61 if stanza.name == "auth" then
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62 -- FIXME ignoring duplicates because ejabberd does
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63 session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, password_callback);
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64 elseif not session.sasl_handler then
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65 return; -- FIXME ignoring out of order stanzas because ejabberd does
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66 end
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67 local text = stanza[1];
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68 if text then
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69 text = base64.decode(text);
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70 if not text then
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71 session.sasl_handler = nil;
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72 session.send(build_reply("failure", "incorrect-encoding"));
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73 return;
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74 end
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75 end
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76 local status, ret, err_msg = session.sasl_handler:feed(text);
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77 handle_status(session, status);
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78 local s = build_reply(status, ret, err_msg);
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79 log("debug", "sasl reply: "..tostring(s));
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80 session.send(s);
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81 end
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82
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83 module:add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
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84 module:add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
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85 module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
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86
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87 local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
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88 local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
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89 local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
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90 module:add_event_hook("stream-features",
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91 function (session, features)
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92 if not session.username then
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93 features:tag("mechanisms", mechanisms_attr);
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94 -- 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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95 features:tag("mechanism"):text("PLAIN"):up();
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96 features:tag("mechanism"):text("DIGEST-MD5"):up();
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97 features:up();
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98 else
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99 features:tag("bind", bind_attr):tag("required"):up():up();
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100 features:tag("session", xmpp_session_attr):up();
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101 end
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102 end);
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103
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104 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
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105 function (session, stanza)
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106 log("debug", "Client tried to bind to a resource");
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107 local resource;
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108 if stanza.attr.type == "set" then
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109 local bind = stanza.tags[1];
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110 if bind and bind.attr.xmlns == xmlns_bind then
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111 resource = bind:child_with_name("resource");
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112 if resource then
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113 resource = resource[1];
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114 end
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115 end
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116 end
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117 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
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118 if not success then
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119 session.send(st.error_reply(stanza, err_type, err, err_msg));
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120 else
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121 session.send(st.reply(stanza)
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122 :tag("bind", { xmlns = xmlns_bind})
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123 :tag("jid"):text(session.full_jid));
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124 end
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125 end);
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126
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127 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
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128 function (session, stanza)
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129 log("debug", "Client tried to bind to a resource");
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130 session.send(st.reply(stanza));
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d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
131 end);