verse
8e6a7a5e70b3
plugins/sasl.lua

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plugins/sasl.lua @ 467:8e6a7a5e70b3

sasl: Expose what mechanisms were offered on authentication-failure
author Matthew Wild <mwild1@gmail.com>
date Fri, 17 Mar 2023 09:24:36 +0000
parent 456:6a65142052c8
child 490:6b2f31da9610
comparison
equal deleted inserted replaced
466:1eaec52ff71a 467:8e6a7a5e70b3
9 local sasl_mechanisms = features_stanza:get_child("mechanisms", xmlns_sasl); 9 local sasl_mechanisms = features_stanza:get_child("mechanisms", xmlns_sasl);
10 if not sasl_mechanisms then return end 10 if not sasl_mechanisms then return end
11 11
12 local mechanisms = {}; 12 local mechanisms = {};
13 local preference = {}; 13 local preference = {};
14 local offered = {};
14 15
15 for mech in sasl_mechanisms:childtags("mechanism") do 16 for mech in sasl_mechanisms:childtags("mechanism") do
16 mech = mech:get_text(); 17 mech = mech:get_text();
17 stream:debug("Server offers %s", mech); 18 stream:debug("Server offers %s", mech);
19 offered[mech] = true;
18 if not mechanisms[mech] then 20 if not mechanisms[mech] then
19 local name = mech:match("[^-]+"); 21 local name = mech:match("[^-]+");
20 local ok, impl = pcall(require, "util.sasl."..name:lower()); 22 local ok, impl = pcall(require, "util.sasl."..name:lower());
21 if ok then 23 if ok then
22 stream:debug("Loaded SASL %s module", name); 24 stream:debug("Loaded SASL %s module", name);
30 local supported = {}; -- by the server 32 local supported = {}; -- by the server
31 for mech in pairs(mechanisms) do 33 for mech in pairs(mechanisms) do
32 table.insert(supported, mech); 34 table.insert(supported, mech);
33 end 35 end
34 if not supported[1] then 36 if not supported[1] then
35 stream:event("authentication-failure", { condition = "no-supported-sasl-mechanisms", mechanisms = mechanisms }); 37 stream:event("authentication-failure", { condition = "no-supported-sasl-mechanisms", mechanisms = offered });
36 stream:close(); 38 stream:close();
37 return; 39 return;
38 end 40 end
39 table.sort(supported, function (a, b) return preference[a] > preference[b]; end); 41 table.sort(supported, function (a, b) return preference[a] > preference[b]; end);
40 local mechanism, initial_data = supported[1]; 42 local mechanism, initial_data = supported[1];