prosody
0d7d71dee0a0
plugins/mod_legacyauth.lua

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plugins/mod_legacyauth.lua @ 10914:0d7d71dee0a0 0.11

mod_auth_internal_*: Apply saslprep to passwords Related to #1560
author Kim Alvefur <zash@zash.se>
date Sat, 23 May 2020 14:17:04 +0200
parent 8768:bd88ca43d77a
child 10557:e1cb869e2f6c
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 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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11 local st = require "util.stanza";
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12 local t_concat = table.concat;
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13
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14 local secure_auth_only = module:get_option("c2s_require_encryption",
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15 module:get_option("require_encryption"))
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16 or not(module:get_option("allow_unencrypted_plain_auth"));
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17
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18 local sessionmanager = require "core.sessionmanager";
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19 local usermanager = require "core.usermanager";
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20 local nodeprep = require "util.encodings".stringprep.nodeprep;
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21 local resourceprep = require "util.encodings".stringprep.resourceprep;
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22
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23 module:add_feature("jabber:iq:auth");
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24 module:hook("stream-features", function(event)
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25 local origin, features = event.origin, event.features;
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26 if secure_auth_only and not origin.secure then
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27 -- Sorry, not offering to insecure streams!
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28 return;
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29 elseif not origin.username then
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30 features:tag("auth", {xmlns='http://jabber.org/features/iq-auth'}):up();
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31 end
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32 end);
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33
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34 module:hook("stanza/iq/jabber:iq:auth:query", function(event)
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35 local session, stanza = event.origin, event.stanza;
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36
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37 if session.type ~= "c2s_unauthed" then
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38 (session.sends2s or session.send)(st.error_reply(stanza, "cancel", "service-unavailable",
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39 "Legacy authentication is only allowed for unauthenticated client connections."));
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40 return true;
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41 end
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42
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43 if secure_auth_only and not session.secure then
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44 session.send(st.error_reply(stanza, "modify", "not-acceptable", "Encryption (SSL or TLS) is required to connect to this server"));
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45 return true;
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46 end
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47
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48 local query = stanza.tags[1];
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49 local username = query:get_child("username");
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50 local password = query:get_child("password");
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51 local resource = query:get_child("resource");
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52 if not (username and password and resource) then
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53 local reply = st.reply(stanza);
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54 session.send(reply:query("jabber:iq:auth")
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55 :tag("username"):up()
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56 :tag("password"):up()
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57 :tag("resource"):up());
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58 else
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59 username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
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60 username = nodeprep(username);
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61 resource = resourceprep(resource)
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62 if not (username and resource) then
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63 session.send(st.error_reply(stanza, "modify", "bad-request"));
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64 return true;
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65 end
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66 if usermanager.test_password(username, session.host, password) then
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67 -- Authentication successful!
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68 local success, err = sessionmanager.make_authenticated(session, username);
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69 if success then
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70 local err_type, err_msg;
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71 success, err_type, err, err_msg = sessionmanager.bind_resource(session, resource);
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72 if not success then
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73 session.send(st.error_reply(stanza, err_type, err, err_msg));
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74 session.username, session.type = nil, "c2s_unauthed"; -- FIXME should this be placed in sessionmanager?
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75 return true;
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76 elseif resource ~= session.resource then -- server changed resource, not supported by legacy auth
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77 session.send(st.error_reply(stanza, "cancel", "conflict", "The requested resource could not be assigned to this session."));
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78 session:close(); -- FIXME undo resource bind and auth instead of closing the session?
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79 return true;
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80 end
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81 end
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82 session.send(st.reply(stanza));
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83 else
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84 session.send(st.error_reply(stanza, "auth", "not-authorized"));
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85 end
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86 end
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87 return true;
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88 end);