prosody
d336b28b4002
plugins/mod_mimicking.lua

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plugins/mod_mimicking.lua @ 11395:d336b28b4002

mod_http_errors: Style tweak Weird to have the background all the way to the edge of the viewport. Would be nice if this could be done without the extra span.
author Kim Alvefur <zash@zash.se>
date Sun, 21 Feb 2021 07:59:17 +0100
parent 9986:9cb639ef5c72
child 11848:b4d4f0339e16
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1 -- Prosody IM
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2 -- Copyright (C) 2012 Florian Zeitz
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3 -- Copyright (C) 2019 Kim Alvefur
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4 --
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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 local encodings = require "util.encodings";
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10 assert(encodings.confusable, "This module requires that Prosody be built with ICU");
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11 local skeleton = encodings.confusable.skeleton;
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12
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13 local usage = require "util.prosodyctl".show_usage;
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14 local usermanager = require "core.usermanager";
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15 local storagemanager = require "core.storagemanager";
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16
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17 local skeletons
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18 function module.load()
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19 if module.host ~= "*" then
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20 skeletons = module:open_store("skeletons");
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21 end
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22 end
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23
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24 module:hook("user-registered", function(user)
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25 local skel = skeleton(user.username);
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26 local ok, err = skeletons:set(skel, { username = user.username });
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27 if not ok then
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28 module:log("error", "Unable to store mimicry data (%q => %q): %s", user.username, skel, err);
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29 end
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30 end);
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31
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32 module:hook("user-deleted", function(user)
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33 local skel = skeleton(user.username);
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34 local ok, err = skeletons:set(skel, nil);
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35 if not ok and err then
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36 module:log("error", "Unable to clear mimicry data (%q): %s", skel, err);
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37 end
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38 end);
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39
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40 module:hook("user-registering", function(user)
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41 local existing, err = skeletons:get(skeleton(user.username));
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42 if existing then
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43 module:log("debug", "Attempt to register username '%s' which could be confused with '%s'", user.username, existing.username);
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44 user.allowed = false;
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45 elseif err then
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46 module:log("error", "Unable to check if new username '%s' can be confused with any existing user: %s", err);
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47 end
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48 end);
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49
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50 function module.command(arg)
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51 if (arg[1] ~= "bootstrap" or not arg[2]) then
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52 usage("mod_mimicking bootstrap <host>", "Initialize username mimicry database");
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53 return;
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54 end
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55
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56 local host = arg[2];
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57
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58 local host_session = prosody.hosts[host];
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59 if not host_session then
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60 return "No such host";
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61 end
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62
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63 storagemanager.initialize_host(host);
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64 usermanager.initialize_host(host);
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65
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66 skeletons = storagemanager.open(host, "skeletons");
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67
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68 local count = 0;
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69 for user in usermanager.users(host) do
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70 local skel = skeleton(user);
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71 local existing, err = skeletons:get(skel);
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72 if existing and existing.username ~= user then
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73 module:log("warn", "Existing usernames '%s' and '%s' are confusable", existing.username, user);
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74 elseif err then
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75 module:log("error", "Error checking for existing mimicry data (%q = %q): %s", user, skel, err);
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76 end
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77 local ok, err = skeletons:set(skel, { username = user });
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78 if ok then
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79 count = count + 1;
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80 elseif err then
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81 module:log("error", "Unable to store mimicry data (%q => %q): %s", user, skel, err);
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82 end
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83 end
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84 module:log("info", "%d usernames indexed", count);
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85 end