prosody
c985536d5452
plugins/mod_saslauth.lua

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plugins/mod_saslauth.lua @ 2179:c985536d5452 sasl

Making mod_saslauth use the new SASL API.
author Tobias Markmann <tm@ayena.de>
date Fri, 28 Aug 2009 13:04:38 +0200
parent 1639:0914d128c55e
child 2193:8fbbdb11a520
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rev   line source
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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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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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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 datamanager_load = require "util.datamanager".load;
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17 local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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18 local usermanager_get_supported_methods = require "core.usermanager".get_supported_methods;
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19 local usermanager_user_exists = require "core.usermanager".user_exists;
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20 local usermanager_get_password = require "core.usermanager".get_password;
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21 local t_concat, t_insert = table.concat, table.insert;
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22 local tostring = tostring;
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23 local jid_split = require "util.jid".split
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24 local md5 = require "util.hashes".md5;
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25 local config = require "core.configmanager";
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27 local secure_auth_only = config.get(module:get_host(), "core", "require_encryption");
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28
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29 local log = module._log;
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31 local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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32 local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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33 local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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34
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35 local new_sasl = require "util.sasl".new;
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36
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37 default_authentication_profile = {
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38 plain = function(username, realm)
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39 return usermanager_get_password(username, realm), true;
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40 end
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41 };
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42
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43 local function build_reply(status, ret, err_msg)
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44 local reply = st.stanza(status, {xmlns = xmlns_sasl});
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45 if status == "challenge" then
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46 log("debug", "%s", ret or "");
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47 reply:text(base64.encode(ret or ""));
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48 elseif status == "failure" then
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49 reply:tag(ret):up();
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50 if err_msg then reply:tag("text"):text(err_msg); end
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51 elseif status == "success" then
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52 log("debug", "%s", ret or "");
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53 reply:text(base64.encode(ret or ""));
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54 else
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55 module:log("error", "Unknown sasl status: %s", status);
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56 end
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57 return reply;
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58 end
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59
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60 local function handle_status(session, status)
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61 if status == "failure" then
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62 session.sasl_handler = nil;
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63 elseif status == "success" then
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64 if not session.sasl_handler.username then -- TODO move this to sessionmanager
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65 module:log("warn", "SASL succeeded but we didn't get a username!");
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66 session.sasl_handler = nil;
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67 session:reset_stream();
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68 return;
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69 end
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70 sm_make_authenticated(session, session.sasl_handler.username);
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71 session.sasl_handler = nil;
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72 session:reset_stream();
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73 end
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74 end
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75
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76 local function credentials_callback(mechanism, ...)
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77 if mechanism == "PLAIN" then
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78 local username, hostname, password = ...;
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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 password = usermanager_get_password(node, domain);
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89 if password then
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90 if decoder then
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91 node, realm, password = decoder(node), decoder(realm), decoder(password);
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92 end
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93 return func, md5(node..":"..realm..":"..password);
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94 else
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95 return func, nil;
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96 end
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97 end
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98 end
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99
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100 local function sasl_handler(session, stanza)
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101 if stanza.name == "auth" then
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102 -- FIXME ignoring duplicates because ejabberd does
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103 if config.get(session.host or "*", "core", "anonymous_login") then
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104 if stanza.attr.mechanism ~= "ANONYMOUS" then
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105 return session.send(build_reply("failure", "invalid-mechanism"));
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106 end
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107 elseif stanza.attr.mechanism == "ANONYMOUS" then
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108 return session.send(build_reply("failure", "mechanism-too-weak"));
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109 end
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110 local valid_mechanism = session.sasl_handler:select(stanza.attr.mechanism);
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111 if not valid_mechanism then
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112 return session.send(build_reply("failure", "invalid-mechanism"));
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113 end
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114 elseif not session.sasl_handler then
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115 return; -- FIXME ignoring out of order stanzas because ejabberd does
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116 end
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117 local text = stanza[1];
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118 if text then
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119 text = base64.decode(text);
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120 log("debug", "%s", text);
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121 if not text then
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122 session.sasl_handler = nil;
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123 session.send(build_reply("failure", "incorrect-encoding"));
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124 return;
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125 end
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126 end
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127 local status, ret, err_msg = session.sasl_handler:process(text);
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128 handle_status(session, status);
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129 local s = build_reply(status, ret, err_msg);
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130 log("debug", "sasl reply: %s", tostring(s));
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131 session.send(s);
284
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132 end
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133
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193f9dd64f17 Bumper commit for the new modulemanager API \o/ Updates all the modules, though some more changes may be in store.
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parents: 357
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134 module:add_handler("c2s_unauthed", "auth", xmlns_sasl, sasl_handler);
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135 module:add_handler("c2s_unauthed", "abort", xmlns_sasl, sasl_handler);
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136 module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler);
284
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137
357
17bcecb06420 Use a stanza for c2s stream features instead of an array of strings. Removes a FIXME.
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138 local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
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139 local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
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140 local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
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141 module:add_event_hook("stream-features",
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142 function (session, features)
1217
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143 if not session.username then
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144 if secure_auth_only and not session.secure then
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145 return;
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146 end
2179
c985536d5452 Making mod_saslauth use the new SASL API.
Tobias Markmann <tm@ayena.de>
parents: 1639
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147 session.sasl_handler = new_sasl(session.host, default_authentication_profile);
705
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148 features:tag("mechanisms", mechanisms_attr);
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149 -- 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
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Waqas Hussain <waqas20@gmail.com>
parents: 896
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150 if config.get(session.host or "*", "core", "anonymous_login") then
887
eef21d7bbe04 mod_saslauth: Disable SASL ANONYMOUS unless explicitly enabled with sasl_anonymous = true
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parents: 799
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151 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.
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parents: 934
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152 else
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153 for k, v in pairs(session.sasl_handler:mechanisms()) do
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154 features:tag("mechanism"):text(v):up();
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155 end
887
eef21d7bbe04 mod_saslauth: Disable SASL ANONYMOUS unless explicitly enabled with sasl_anonymous = true
Matthew Wild <mwild1@gmail.com>
parents: 799
diff changeset
156 end
705
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diff changeset
157 features:up();
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158 else
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diff changeset
159 features:tag("bind", bind_attr):tag("required"):up():up();
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160 features:tag("session", xmpp_session_attr):up();
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161 end
11afa1d88c55 mod_saslauth, mod_tls: minor code cleanup
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parents: 615
diff changeset
162 end);
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diff changeset
163
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
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diff changeset
164 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
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parents: 38
diff changeset
165 function (session, stanza)
1072
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166 log("debug", "Client requesting a resource bind");
46
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diff changeset
167 local resource;
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168 if stanza.attr.type == "set" then
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169 local bind = stanza.tags[1];
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diff changeset
170 if bind and bind.attr.xmlns == xmlns_bind then
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diff changeset
171 resource = bind:child_with_name("resource");
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
172 if resource then
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
173 resource = resource[1];
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
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parents: 38
diff changeset
174 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
175 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
176 end
304
7b28fa8bbfe5 Code cleanup for resource binding
Waqas Hussain <waqas20@gmail.com>
parents: 297
diff changeset
177 local success, err_type, err, err_msg = sm_bind_resource(session, resource);
46
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diff changeset
178 if not success then
304
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parents: 297
diff changeset
179 session.send(st.error_reply(stanza, err_type, err, err_msg));
46
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diff changeset
180 else
304
7b28fa8bbfe5 Code cleanup for resource binding
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parents: 297
diff changeset
181 session.send(st.reply(stanza)
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diff changeset
182 :tag("bind", { xmlns = xmlns_bind})
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parents: 297
diff changeset
183 :tag("jid"):text(session.full_jid));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
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parents: 38
diff changeset
184 end
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
185 end);
1584
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diff changeset
186
ffe8a9296e04 mod_saslauth, usermanager: Fetch list of mechanisms from usermanager
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parents: 1523
diff changeset
187 module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
46
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Matthew Wild <mwild1@gmail.com>
parents: 38
diff changeset
188 function (session, stanza)
1072
c7967004b5d0 mod_saslauth: Various logging fixes
Matthew Wild <mwild1@gmail.com>
parents: 1071
diff changeset
189 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
190 session.send(st.reply(stanza));
46
d6b3f9dbb624 Resource binding, XMPP sessions (whatever they're for...)
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parents: 38
diff changeset
191 end);