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113 lines
3.7 KiB
113 lines
3.7 KiB
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local st = require "util.stanza";
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local send = require "core.sessionmanager".send_to_session;
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local sm_bind_resource = require "core.sessionmanager".bind_resource;
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local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
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local t_concat, t_insert = table.concat, table.insert;
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local tostring = tostring;
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local log = require "util.logger".init("mod_saslauth");
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local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl';
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local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
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local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
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local new_connhandler = require "net.connhandlers".new;
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local new_sasl = require "util.sasl".new;
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add_handler("c2s_unauthed", "auth", xmlns_sasl,
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function (session, stanza)
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if not session.sasl_handler then
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session.sasl_handler = new_sasl(stanza.attr.mechanism,
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function (username, password)
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-- onAuth
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require "core.usermanager"
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if usermanager_validate_credentials(session.host, username, password) then
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return true;
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end
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return false;
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end,
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function (username)
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-- onSuccess
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local success, err = sessionmanager.make_authenticated(session, username);
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if not success then
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sessionmanager.destroy_session(session);
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return;
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end
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session.sasl_handler = nil;
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session.connhandler = new_connhandler("xmpp-client", session);
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session.notopen = true;
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end,
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function (reason)
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-- onFail
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log("debug", "SASL failure, reason: %s", reason);
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end,
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function (stanza)
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-- onWrite
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log("debug", "SASL writes: %s", tostring(stanza));
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send(session, stanza);
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end
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);
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session.sasl_handler:feed(stanza);
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else
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error("Client tried to negotiate SASL again", 0);
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end
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end);
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add_event_hook("stream-features",
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function (session, features)
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if not session.username then
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t_insert(features, "<mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>");
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t_insert(features, "<mechanism>PLAIN</mechanism>");
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t_insert(features, "</mechanisms>");
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else
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t_insert(features, "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><required/></bind>");
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t_insert(features, "<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>");
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end
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--send [[<register xmlns="http://jabber.org/features/iq-register"/> ]]
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end);
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add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
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function (session, stanza)
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log("debug", "Client tried to bind to a resource");
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local resource;
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if stanza.attr.type == "set" then
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local bind = stanza.tags[1];
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if bind and bind.attr.xmlns == xmlns_bind then
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resource = bind:child_with_name("resource");
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if resource then
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resource = resource[1];
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end
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end
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end
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local success, err = sm_bind_resource(session, resource);
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if not success then
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local reply = st.reply(stanza);
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reply.attr.type = "error";
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if err == "conflict" then
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reply:tag("error", { type = "modify" })
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:tag("conflict", { xmlns = xmlns_stanzas });
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elseif err == "constraint" then
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reply:tag("error", { type = "cancel" })
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:tag("resource-constraint", { xmlns = xmlns_stanzas });
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elseif err == "auth" then
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reply:tag("error", { type = "cancel" })
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:tag("not-allowed", { xmlns = xmlns_stanzas });
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end
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send(session, reply);
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else
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local reply = st.reply(stanza);
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reply:tag("bind", { xmlns = xmlns_bind})
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:tag("jid"):text(session.full_jid);
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send(session, reply);
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end
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end);
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add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
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function (session, stanza)
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log("debug", "Client tried to bind to a resource");
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send(session, st.reply(stanza));
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end);
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