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annotate mod_s2s_auth_fingerprint/mod_s2s_auth_fingerprint.lua @ 5405:c7a5caad28ef

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mod_http_oauth2: Enforce response type encoded in client_id The client promises to only use this response type, so we should hold them to that. This makes it fail earlier if the response type is disabled or the client is trying to use one that it promised not to use. Better than failing after login and consent.
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:31:25 +0200
parents ee2cedb0f691
children
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1 -- Copyright (C) 2013-2014 Kim Alvefur
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2 -- This file is MIT/X11 licensed.
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4 module:set_global();
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6 local digest_algo = module:get_option_string(module:get_name().."_digest", "sha1");
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8 local fingerprints = {};
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10 local function hashprep(h)
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11 return tostring(h):gsub(":",""):lower();
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12 end
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14 local function hashfmt(h)
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15 return h:gsub("..","%0:", #h/2-1):upper();
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16 end
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18 for host, set in pairs(module:get_option("s2s_trusted_fingerprints", {})) do
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19 local host_set = {}
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20 if type(set) == "table" then -- list of fingerprints
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21 for i=1,#set do
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22 host_set[hashprep(set[i])] = true;
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23 end
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24 else -- assume single fingerprint
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25 host_set[hashprep(set)] = true;
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26 end
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27 fingerprints[host] = host_set;
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28 end
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30 module:hook("s2s-check-certificate", function(event)
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31 local session, host, cert = event.session, event.host, event.cert;
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33 local host_fingerprints = fingerprints[host];
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34 if host_fingerprints then
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35 local digest = cert and cert:digest(digest_algo);
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36 if host_fingerprints[digest] then
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37 module:log("info", "'%s' matched %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
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38 session.cert_chain_status = "valid";
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39 session.cert_identity_status = "valid";
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40 return true;
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41 else
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42 module:log("warn", "'%s' has unknown %s fingerprint %s", host, digest_algo:upper(), hashfmt(digest));
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43 session.cert_chain_status = "invalid";
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44 session.cert_identity_status = "invalid";
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45 end
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46 end
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47 end);