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annotate mod_flash_policy/mod_flash_policy.lua @ 5401:c8d04ac200fc

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mod_http_oauth2: Reject loopback URIs as client_uri This really should be a proper website with info, https://localhost is not good enough. Ideally we'd validate that it's got proper DNS and is actually reachable, but triggering HTTP or even DNS lookups seems like it would carry abuse potential that would best to avoid.
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:20:55 +0200
parents 7dbde05b48a9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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4219f69be1cf Let session.send() actually send the config string
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1 local filters = require "util.filters";
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2 local config = {}
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3 config.file = module:get_option_string("crossdomain_file", "");
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4 config.string = module:get_option_string("crossdomain_string", [[<?xml version="1.0"?><!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd"><cross-domain-policy><site-control permitted-cross-domain-policies="master-only"/><allow-access-from domain="*" /></cross-domain-policy>]]);
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5 local string = ''
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6 if not config.file ~= '' then
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7 local f = assert(io.open(config.file));
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8 string = f:read("*all");
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9 else
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10 string = config.string
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11 end
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13 module:log("debug", "crossdomain string: "..string);
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15 module:set_global();
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17 function filter_policy(data, session)
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18 -- Since we only want to check the first block of data, remove the filter
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19 filters.remove_filter(session, "bytes/in", filter_policy);
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20 if data == "<policy-file-request/>\0" then
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21 session.send(string.."\0");
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22 return nil; -- Drop data to prevent it reaching the XMPP parser
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23 else
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24 return data; -- Pass data through, it wasn't a policy request
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25 end
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26
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27 end
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29 function filter_session(session)
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30 if session.type == "c2s_unauthed" then
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31 filters.add_filter(session, "bytes/in", filter_policy, -1);
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32 end
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33 end
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35 function module.load()
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36 filters.add_filter_hook(filter_session);
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37 end
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39 function module.unload()
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40 filters.remove_filter_hook(filter_session);
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41 end