author | Kim Alvefur <zash@zash.se> |
Wed, 03 Mar 2021 11:43:38 +0100 | |
changeset 4494 | cf2bdb2aaa57 |
parent 3109 | ce946d9d982e |
permissions | -rw-r--r-- |
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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module:depends("cache_c2s_caps"); |
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local st = require "util.stanza"; |
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local hashes = require "util.hashes"; |
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local base64 = require "util.encodings".base64; |
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local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; |
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|
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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local algorithms = module:get_option_set("ecaps2_hashes", { "sha-256", "sha-512" }); |
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|
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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-- TODO: Add all of the other hashes supported. |
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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local algorithm_map = { |
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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["sha-256"] = hashes.sha256; |
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["sha-512"] = hashes.sha512; |
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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}; |
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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|
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mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
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-- TODO: move that to util.caps maybe. |
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local function calculate_hash(disco_info) |
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local identities, features, extensions = {}, {}, {}; |
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for _, tag in ipairs(disco_info) do |
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if tag.name == "identity" then |
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mod_inject_ecaps2: Add Lua 5.1 compatibility by replacing \xHEX with \DECIMAL in strings
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t_insert(identities, ((tag.attr.category or "").."\31".. |
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(tag.attr.type or "").."\31".. |
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(tag.attr["xml:lang"] or "").."\31".. |
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(tag.attr.name or "").."\31\30")); |
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elseif tag.name == "feature" then |
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t_insert(features, (tag.attr.var or "").."\31"); |
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elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then |
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local form = {}; |
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for _, field in ipairs(tag.tags) do |
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if field.name == "field" and field.attr.xmlns == "jabber:x:data" and field.attr.var then |
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local values = {}; |
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for _, value in ipairs(field.tags) do |
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if value.name == "value" and value.attr.xmlns == "jabber:x:data" then |
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value = #value.tags == 0 and value:get_text(); |
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if value then t_insert(values, value.."\31"); end |
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end |
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end |
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t_sort(values); |
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if #values > 0 then |
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t_insert(form, field.attr.var.."\31"..t_concat(values, "\31").."\31\30"); |
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else |
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t_insert(form, field.attr.var.."\31\30"); |
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end |
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end |
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end |
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t_sort(form); |
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form = t_concat(form, "\29").."\29"; |
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t_insert(extensions, form); |
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else |
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return nil, "Unknown element in disco#info"; |
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end |
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end |
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t_sort(identities); |
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t_sort(features); |
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t_sort(extensions); |
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if #identities > 0 then identities = t_concat(identities, "\28").."\28"; else identities = "\28"; end |
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if #features > 0 then features = t_concat(features).."\28"; else features = "\28"; end |
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if #extensions > 0 then extensions = t_concat(extensions, "\28").."\28"; else extensions = "\28"; end |
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return features..identities..extensions; |
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end |
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|
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local function caps_handler(event) |
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local origin = event.origin; |
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|
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if origin.presence == nil or origin.presence:get_child("c", "urn:xmpp:caps") then |
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return; |
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end |
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|
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local disco_info = origin.caps_cache; |
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if disco_info == nil then |
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return; |
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end |
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|
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local extension_string, err = calculate_hash(disco_info); |
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if extension_string == nil then |
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module:log("warn", "Failed to calculate ecaps2 hash: %s", err) |
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return; |
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end |
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|
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local ecaps2 = st.stanza("c", { xmlns = "urn:xmpp:caps" }); |
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for algo in algorithms do |
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local func = algorithm_map[algo]; |
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if func ~= nil then |
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local hash = base64.encode(func(extension_string)); |
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ecaps2:tag("hash", { xmlns = "urn:xmpp:hashes:2"; algo = algo }) |
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:text(hash) |
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:up(); |
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end |
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end |
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|
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module:log("debug", "Injected ecaps2 element in presence"); |
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origin.presence:add_child(ecaps2); |
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93 |
end |
776017c92076
mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff
changeset
|
94 |
|
776017c92076
mod_inject_ecaps2: New module adding support for XEP-0390 to all local clients supporting XEP-0115
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
diff
changeset
|
95 |
module:hook("c2s-capabilities-changed", caps_handler); |