annotate mod_auth_token/mod_auth_token.lua @ 4651:8231774f5bfd

mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8 The `body:sub()` call risks splitting the string in the middle of a multi-byte UTF-8 sequence. This should have been caught by util.stanza validation, but that would have caused some havoc, at the very least causing the notification to not be sent. There have been no reports of this happening. Likely because this module isn't widely deployed among users with languages that use many longer UTF-8 sequences. The util.encodings.utf8.valid() function is O(n) where only the last sequence really needs to be checked, but it's in C and expected to be fast.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Aug 2021 13:22:59 +0200
parents 0fb12a4b6106
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 host = module.host;
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7 local log = module._log;
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8 local new_sasl = require "util.sasl".new;
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9 local usermanager = require "core.usermanager";
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10 local verify_token = module:require "token_auth_utils".verify_token;
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11
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12 local provider = {};
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13
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14
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15 function provider.test_password(username, password)
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16 log("debug", "Testing signed OTP for user %s at host %s", username, host);
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17 return verify_token(
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18 username,
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19 password,
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20 module:get_option_string("otp_seed"),
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21 module:get_option_string("token_secret"),
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22 log
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23 );
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24 end
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25
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26 function provider.users()
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27 return function()
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28 return nil;
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29 end
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30 end
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31
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32 function provider.set_password(username, password)
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33 return nil, "Changing passwords not supported";
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34 end
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35
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36 function provider.user_exists(username)
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37 return true;
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38 end
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39
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40 function provider.create_user(username, password)
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41 return nil, "User creation not supported";
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42 end
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43
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44 function provider.delete_user(username)
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45 return nil , "User deletion not supported";
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46 end
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47
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48 function provider.get_sasl_handler()
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49 local supported_mechanisms = {};
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50 supported_mechanisms["X-TOKEN"] = true;
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51 return new_sasl(host, {
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52 token = function(sasl, username, password, realm)
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53 return usermanager.test_password(username, realm, password), true;
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54 end,
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55 mechanisms = supported_mechanisms
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56 });
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57 end
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58
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59 module:provides("auth", provider);