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util/caps.lua @ 12482:b193f8a2737e
mod_tls: Do not offer TLS if the connection is considered secure
This may be necessary if the session.conn object is not exchanged by the
network backend when establishing TLS. In that case, the starttls method
will always exist and thus that is not a good indicator for offering
TLS.
However, the secure bit already tells us that TLS has been established
or is not to be established on the connection, so we use that instead.
author | Jonas Schäfer <jonas@wielicki.name> |
---|---|
date | Fri, 17 Sep 2021 21:18:30 +0200 (2021-09-17) |
parent | 8555:4f0f5b49bb03 |
child | 12975:d10957394a3c |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local base64 = require "util.encodings".base64.encode; local sha1 = require "util.hashes".sha1; local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; local ipairs = ipairs; local _ENV = nil; -- luacheck: std none 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 "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or "")); elseif tag.name == "feature" then t_insert(features, tag.attr.var or ""); elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then local form = {}; local FORM_TYPE; for _, field in ipairs(tag.tags) do if field.name == "field" and field.attr.var then local values = {}; for _, val in ipairs(field.tags) do val = #val.tags == 0 and val:get_text(); if val then t_insert(values, val); end end t_sort(values); if field.attr.var == "FORM_TYPE" then FORM_TYPE = values[1]; elseif #values > 0 then t_insert(form, field.attr.var.."\0"..t_concat(values, "<")); else t_insert(form, field.attr.var); end end end t_sort(form); form = t_concat(form, "<"); if FORM_TYPE then form = FORM_TYPE.."\0"..form; end t_insert(extensions, form); end end t_sort(identities); t_sort(features); t_sort(extensions); if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end local S = identities..features..extensions; local ver = base64(sha1(S)); return ver, S; end return { calculate_hash = calculate_hash; };