Mercurial > prosody-modules
view mod_inject_ecaps2/mod_inject_ecaps2.lua @ 5425:3b30635d215c
mod_http_oauth2: Support granting zero role-scopes
It seems Very Bad that if you uncheck all roles on the consent page, you
get the default scopes, which seems the opposite of what you probably
intended. Currently, mod_tokenauth will do the same thing, so work is
needed there too to allow issuing tokens without roles.
A token without a role could be used for OIDC login, and not much else.
This seems like a valuable thing to support.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 07 May 2023 19:29:15 +0200 |
parents | ce946d9d982e |
children |
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module:depends("cache_c2s_caps"); local st = require "util.stanza"; local hashes = require "util.hashes"; local base64 = require "util.encodings".base64; local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; local algorithms = module:get_option_set("ecaps2_hashes", { "sha-256", "sha-512" }); -- TODO: Add all of the other hashes supported. local algorithm_map = { ["sha-256"] = hashes.sha256; ["sha-512"] = hashes.sha512; }; -- TODO: move that to util.caps maybe. local function calculate_hash(disco_info) local identities, features, extensions = {}, {}, {}; for _, tag in ipairs(disco_info) do if tag.name == "identity" then t_insert(identities, ((tag.attr.category or "").."\31".. (tag.attr.type or "").."\31".. (tag.attr["xml:lang"] or "").."\31".. (tag.attr.name or "").."\31\30")); elseif tag.name == "feature" then t_insert(features, (tag.attr.var or "").."\31"); elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then local form = {}; for _, field in ipairs(tag.tags) do if field.name == "field" and field.attr.xmlns == "jabber:x:data" and field.attr.var then local values = {}; for _, value in ipairs(field.tags) do if value.name == "value" and value.attr.xmlns == "jabber:x:data" then value = #value.tags == 0 and value:get_text(); if value then t_insert(values, value.."\31"); end end end t_sort(values); if #values > 0 then t_insert(form, field.attr.var.."\31"..t_concat(values, "\31").."\31\30"); else t_insert(form, field.attr.var.."\31\30"); end end end t_sort(form); form = t_concat(form, "\29").."\29"; t_insert(extensions, form); else return nil, "Unknown element in disco#info"; end end t_sort(identities); t_sort(features); t_sort(extensions); if #identities > 0 then identities = t_concat(identities, "\28").."\28"; else identities = "\28"; end if #features > 0 then features = t_concat(features).."\28"; else features = "\28"; end if #extensions > 0 then extensions = t_concat(extensions, "\28").."\28"; else extensions = "\28"; end return features..identities..extensions; end local function caps_handler(event) local origin = event.origin; if origin.presence == nil or origin.presence:get_child("c", "urn:xmpp:caps") then return; end local disco_info = origin.caps_cache; if disco_info == nil then return; end local extension_string, err = calculate_hash(disco_info); if extension_string == nil then module:log("warn", "Failed to calculate ecaps2 hash: %s", err) return; end local ecaps2 = st.stanza("c", { xmlns = "urn:xmpp:caps" }); for algo in algorithms do local func = algorithm_map[algo]; if func ~= nil then local hash = base64.encode(func(extension_string)); ecaps2:tag("hash", { xmlns = "urn:xmpp:hashes:2"; algo = algo }) :text(hash) :up(); end end module:log("debug", "Injected ecaps2 element in presence"); origin.presence:add_child(ecaps2); end module:hook("c2s-capabilities-changed", caps_handler);