Annotate

plugins/mod_saslauth.lua @ 1981:ffbc57a4dea8

mod_tls: Offer the host-specific cert (when there is one) to incoming c2s/s2s connections, fixes #30 (thanks, albert, Flo, johnny, and all who nagged me :) )
author Matthew Wild <mwild1@gmail.com>
date Sat, 17 Oct 2009 16:25:28 +0100
parent 1912:126401a7159f
child 2013:0bbbc9042361
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local st = require "util.stanza";
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12 local sm_bind_resource = require "core.sessionmanager".bind_resource;
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13 local sm_make_authenticated = require "core.sessionmanager".make_authenticated;
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14 local base64 = require "util.encodings".base64;
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15
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16 local nodeprep = require "util.encodings".stringprep.nodeprep;
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17 local datamanager_load = require "util.datamanager".load;
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18 local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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19 local usermanager_get_supported_methods = require "core.usermanager".get_supported_methods;
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20 local usermanager_user_exists = require "core.usermanager".user_exists;
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21 local usermanager_get_password = require "core.usermanager".get_password;
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22 local t_concat, t_insert = table.concat, table.insert;
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23 local tostring = tostring;
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24 local jid_split = require "util.jid".split
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25 local md5 = require "util.hashes".md5;
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26 local config = require "core.configmanager";
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27
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28 local secure_auth_only = config.get(module:get_host(), "core", "c2s_require_encryption") or config.get(module:get_host(), "core", "require_encryption");
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29
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30 local log = module._log;
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32 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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33 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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34 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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36 local new_sasl = require "util.sasl".new;
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37
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38 local function build_reply(status, ret, err_msg)
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39 local reply = st.stanza(status, {xmlns = xmlns_sasl});
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40 if status == "challenge" then
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41 log("debug", "%s", ret or "");
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42 reply:text(base64.encode(ret or ""));
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43 elseif status == "failure" then
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44 reply:tag(ret):up();
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45 if err_msg then reply:tag("text"):text(err_msg); end
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46 elseif status == "success" then
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47 log("debug", "%s", ret or "");
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48 reply:text(base64.encode(ret or ""));
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49 else
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50 module:log("error", "Unknown sasl status: %s", status);
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51 end
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52 return reply;
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53 end
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54
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55 local function handle_status(session, status)
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56 if status == "failure" then
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57 session.sasl_handler = nil;
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58 elseif status == "success" then
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59 local username = nodeprep(session.sasl_handler.username);
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60 session.sasl_handler = nil;
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61 if not username then -- TODO move this to sessionmanager
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62 module:log("warn", "SASL succeeded but we didn't get a username!");
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63 session.sasl_handler = nil;
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64 session:reset_stream();
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65 return;
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66 end
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67 sm_make_authenticated(session, username);
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68 session:reset_stream();
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69 end
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70 end
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71
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72 local function credentials_callback(mechanism, ...)
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73 if mechanism == "PLAIN" then
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74 local username, hostname, password = ...;
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75 username = nodeprep(username);
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76 if not username then
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77 return false;
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78 end
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79 local response = usermanager_validate_credentials(hostname, username, password, mechanism);
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80 if response == nil then
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81 return false;
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82 else
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83 return response;
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84 end
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85 elseif mechanism == "DIGEST-MD5" then
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86 function func(x) return x; end
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87 local node, domain, realm, decoder = ...;
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88 local prepped_node = nodeprep(node);
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89 if not prepped_node then
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90 return func, nil;
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91 end
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92 local password = usermanager_get_password(prepped_node, domain);
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93 if password then
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94 if decoder then
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95 node, realm, password = decoder(node), decoder(realm), decoder(password);
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96 end
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97 return func, md5(node..":"..realm..":"..password);
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98 else
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99 return func, nil;
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100 end
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101 end
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102 end
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103
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104 local function sasl_handler(session, stanza)
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105 if stanza.name == "auth" then
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106 -- FIXME ignoring duplicates because ejabberd does
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107 if config.get(session.host or "*", "core", "anonymous_login") then
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108 if stanza.attr.mechanism ~= "ANONYMOUS" then
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109 return session.send(build_reply("failure", "invalid-mechanism"));
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110 end
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111 elseif stanza.attr.mechanism == "ANONYMOUS" then
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112 return session.send(build_reply("failure", "mechanism-too-weak"));
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113 end
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114 session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, credentials_callback);
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115 if not session.sasl_handler then
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116 return session.send(build_reply("failure", "invalid-mechanism"));
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117 end
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118 elseif not session.sasl_handler then
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119 return; -- FIXME ignoring out of order stanzas because ejabberd does
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120 end
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121 local text = stanza[1];
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122 if text then
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123 text = base64.decode(text);
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124 log("debug", "%s", text);
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125 if not text then
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126 session.sasl_handler = nil;
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127 session.send(build_reply("failure", "incorrect-encoding"));
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128 return;
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129 end
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130 end
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131 local status, ret, err_msg = session.sasl_handler:feed(text);
284
4f540755260c mod_saslauth: Added base64 decoding, encoding check, and cleaned the code up.
Waqas Hussain <waqas20@gmail.com>
parents: 281
diff changeset
132 handle_status(session, status);
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133 local s = build_reply(status, ret, err_msg);
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Matthew Wild <mwild1@gmail.com>
parents: 1071
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134 log("debug", "sasl reply: %s", tostring(s));
288
dc53343af9ac Set username in a SASL object.
Tobias Markmann <tm@ayena.de>
parents: 286
diff changeset
135 session.send(s);
284
4f540755260c mod_saslauth: Added base64 decoding, encoding check, and cleaned the code up.
Waqas Hussain <waqas20@gmail.com>
parents: 281
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136 end
4f540755260c mod_saslauth: Added base64 decoding, encoding check, and cleaned the code up.
Waqas Hussain <waqas20@gmail.com>
parents: 281
diff changeset
137
438
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 357
diff changeset
138 module:add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 357
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139 module:add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
Matthew Wild <mwild1@gmail.com>
parents: 357
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140 module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
284
4f540755260c mod_saslauth: Added base64 decoding, encoding check, and cleaned the code up.
Waqas Hussain <waqas20@gmail.com>
parents: 281
diff changeset
141
357
17bcecb06420 Use a stanza for c2s stream features instead of an array of strings. Removes a FIXME.
Matthew Wild <mwild1@gmail.com>
parents: 313
diff changeset
142 local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
17bcecb06420 Use a stanza for c2s stream features instead of an array of strings. Removes a FIXME.
Matthew Wild <mwild1@gmail.com>
parents: 313
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143 local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
17bcecb06420 Use a stanza for c2s stream features instead of an array of strings. Removes a FIXME.
Matthew Wild <mwild1@gmail.com>
parents: 313
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144 local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
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145 module:add_event_hook("stream-features",
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diff changeset
146 function (session, features)
1217
844ef764ef0e mod_saslauth: Don't offer bind/session when they aren't authenticated yet :) [thanks albert, again...]
Matthew Wild <mwild1@gmail.com>
parents: 1216
diff changeset
147 if not session.username then
844ef764ef0e mod_saslauth: Don't offer bind/session when they aren't authenticated yet :) [thanks albert, again...]
Matthew Wild <mwild1@gmail.com>
parents: 1216
diff changeset
148 if secure_auth_only and not session.secure then
844ef764ef0e mod_saslauth: Don't offer bind/session when they aren't authenticated yet :) [thanks albert, again...]
Matthew Wild <mwild1@gmail.com>
parents: 1216
diff changeset
149 return;
844ef764ef0e mod_saslauth: Don't offer bind/session when they aren't authenticated yet :) [thanks albert, again...]
Matthew Wild <mwild1@gmail.com>
parents: 1216
diff changeset
150 end
705
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Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
151 features:tag("mechanisms", mechanisms_attr);
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
152 -- 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.
934
0bda9b5b6a06 Fixed: mod_saslauth: Changed anonymous host option from "sasl_anonymous" to "anonymous_login"
Waqas Hussain <waqas20@gmail.com>
parents: 896
diff changeset
153 if config.get(session.host or "*", "core", "anonymous_login") then
887
eef21d7bbe04 mod_saslauth: Disable SASL ANONYMOUS unless explicitly enabled with sasl_anonymous = true
Matthew Wild <mwild1@gmail.com>
parents: 799
diff changeset
154 features:tag("mechanism"):text("ANONYMOUS"):up();
935
efe3eaaeff34 Fixed: mod_saslauth: "anonymous_login" currently makes SASL ANONYMOUS an exclusive mechanism. Corrected advertised mechanisms and error replies.
Waqas Hussain <waqas20@gmail.com>
parents: 934
diff changeset
155 else
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parents: 1523
diff changeset
156 mechanisms = usermanager_get_supported_methods(session.host or "*");
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
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parents: 1523
diff changeset
157 for k, v in pairs(mechanisms) do
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
Nick Thomas
parents: 1523
diff changeset
158 features:tag("mechanism"):text(k):up();
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
Nick Thomas
parents: 1523
diff changeset
159 end
887
eef21d7bbe04 mod_saslauth: Disable SASL ANONYMOUS unless explicitly enabled with sasl_anonymous = true
Matthew Wild <mwild1@gmail.com>
parents: 799
diff changeset
160 end
705
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
161 features:up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
162 else
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
163 features:tag("bind", bind_attr):tag("required"):up():up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
164 features:tag("session", xmpp_session_attr):up();
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
165 end
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
Waqas Hussain <waqas20@gmail.com>
parents: 615
diff changeset
166 end);
1584
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Nick Thomas
parents: 1523
diff changeset
167
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
Nick Thomas
parents: 1523
diff changeset
168 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
169 function (session, stanza)
1072
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Matthew Wild <mwild1@gmail.com>
parents: 1071
diff changeset
170 log("debug", "Client requesting a resource bind");
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
171 local resource;
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
172 if stanza.attr.type == "set" then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
173 local bind = stanza.tags[1];
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
174 if bind and bind.attr.xmlns == xmlns_bind then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
175 resource = bind:child_with_name("resource");
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
176 if resource then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
177 resource = resource[1];
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
178 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
179 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
180 end
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
181 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
182 if not success then
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
183 session.send(st.error_reply(stanza, err_type, err, err_msg));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
184 else
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
185 session.send(st.reply(stanza)
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
186 :tag("bind", { xmlns = xmlns_bind})
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
187 :tag("jid"):text(session.full_jid));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
188 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
189 end);
1584
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Nick Thomas
parents: 1523
diff changeset
190
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
Nick Thomas
parents: 1523
diff changeset
191 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
192 function (session, stanza)
1072
c7967004b5d0 mod_saslauth: Various logging fixes
Matthew Wild <mwild1@gmail.com>
parents: 1071
diff changeset
193 log("debug", "Client requesting a session");
313
a273f3a7b8f8 Fixed mod_saslauth to use session.send for sending stanzas
Waqas Hussain <waqas20@gmail.com>
parents: 304
diff changeset
194 session.send(st.reply(stanza));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
195 end);