annotate mod_auth_token/mod_sasl_token.lua @ 3656:3e0f4d727825

mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:46:43 +0200
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1 -- Copyright (C) 2018 Minddistrict
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2 --
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3 -- This file is MIT/X11 licensed.
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4 --
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5
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6 local s_match = string.match;
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7 local registerMechanism = require "util.sasl".registerMechanism;
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8 local saslprep = require "util.encodings".stringprep.saslprep;
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9 local nodeprep = require "util.encodings".stringprep.nodeprep;
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10 local log = require "util.logger".init("sasl");
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11 local _ENV = nil;
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12
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13
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14 local function token_auth(self, message)
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15 if not message then
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16 return "failure", "malformed-request";
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17 end
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18
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19 local authorization, authentication, password = s_match(message, "^([^%z]*)%z([^%z]+)%z([^%z]+)");
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20
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21 if not authorization then
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22 return "failure", "malformed-request";
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23 end
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24
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25 -- SASLprep password and authentication
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26 authentication = saslprep(authentication);
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27 password = saslprep(password);
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28
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29 if (not password) or (password == "") or (not authentication) or (authentication == "") then
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30 log("debug", "Username or password violates SASLprep.");
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31 return "failure", "malformed-request", "Invalid username or password.";
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32 end
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33
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34 local _nodeprep = self.profile.nodeprep;
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35 if _nodeprep ~= false then
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36 authentication = (_nodeprep or nodeprep)(authentication);
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37 if not authentication or authentication == "" then
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38 return "failure", "malformed-request", "Invalid username or password."
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39 end
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40 end
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41
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42 local correct, state = false, false;
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43 correct, state = self.profile.token(self, authentication, password, self.realm);
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44
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45 self.username = authentication
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46 if state == false then
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47 return "failure", "account-disabled";
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48 elseif state == nil or not correct then
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49 return "failure", "not-authorized", "Unable to authorize you with the authentication credentials you've sent.";
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50 end
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51 return "success";
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52 end
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53
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54 registerMechanism("X-TOKEN", {"token"}, token_auth);