Mercurial > prosody-modules

annotate mod_auth_token/mod_sasl_token.lua @ 5448:9d542e86e19a

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mod_http_oauth2: Allow requesting a subset of scopes on token refresh This enables clients to request access tokens with fewer permissions than the grant they were given, reducing impact of token leak. Clients could e.g. request access tokens with some privileges and immediately revoke them after use, or other strategies.
author Kim Alvefur <zash@zash.se>
date Thu, 11 May 2023 21:40:09 +0200
parents d0ca211e1b0e
children
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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);