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local type, tostring, pairs, ipairs = type, tostring, pairs, ipairs;
local t_insert, t_concat = table.insert, table.concat;
local s_format = string.format;
local oid_xmppaddr = "1.3.6.1.5.5.7.8.5"; -- [XMPP-CORE]
local oid_dnssrv = "1.3.6.1.5.5.7.8.7"; -- [SRV-ID]
local idna_to_ascii = require "util.encodings".idna.to_ascii;
local _M = {};
local config = {};
_M.config = config;
local ssl_config = {};
local ssl_config_mt = {__index=ssl_config};
function config.new()
return setmetatable({
req = {
distinguished_name = "distinguished_name",
req_extensions = "certrequest",
x509_extensions = "selfsigned",
prompt = "no",
},
distinguished_name = {
countryName = "GB",
-- stateOrProvinceName = "",
localityName = "The Internet",
organizationName = "Your Organisation",
organizationalUnitName = "XMPP Department",
commonName = "example.com",
emailAddress = "xmpp@example.com",
},
certrequest = {
basicConstraints = "CA:FALSE",
keyUsage = "digitalSignature,keyEncipherment",
extendedKeyUsage = "serverAuth,clientAuth",
subjectAltName = "@subject_alternative_name",
},
selfsigned = {
basicConstraints = "CA:TRUE",
subjectAltName = "@subject_alternative_name",
},
subject_alternative_name = {
DNS = {},
otherName = {},
},
}, ssl_config_mt);
end
local DN_order = {
"countryName";
"stateOrProvinceName";
"localityName";
"streetAddress";
"organizationName";
"organizationalUnitName";
"commonName";
"emailAddress";
}
_M._DN_order = DN_order;
function ssl_config:serialize()
local s = "";
for k, t in pairs(self) do
s = s .. ("[%s]\n"):format(k);
if k == "subject_alternative_name" then
for san, n in pairs(t) do
for i = 1,#n do
s = s .. s_format("%s.%d = %s\n", san, i -1, n[i]);
end
end
elseif k == "distinguished_name" then
for i=1,#DN_order do
local k = DN_order[i]
local v = t[k];
if v then
s = s .. ("%s = %s\n"):format(k, v);
end
end
else
for k, v in pairs(t) do
s = s .. ("%s = %s\n"):format(k, v);
end
end
s = s .. "\n";
end
return s;
end
local function utf8string(s)
-- This is how we tell openssl not to encode UTF-8 strings as fake Latin1
return s_format("FORMAT:UTF8,UTF8:%s", s);
end
local function ia5string(s)
return s_format("IA5STRING:%s", s);
end
_M.util = {
utf8string = utf8string,
ia5string = ia5string,
};
function ssl_config:add_dNSName(host)
t_insert(self.subject_alternative_name.DNS, idna_to_ascii(host));
end
function ssl_config:add_sRVName(host, service)
t_insert(self.subject_alternative_name.otherName,
s_format("%s;%s", oid_dnssrv, ia5string("_" .. service .."." .. idna_to_ascii(host))));
end
function ssl_config:add_xmppAddr(host)
t_insert(self.subject_alternative_name.otherName,
s_format("%s;%s", oid_xmppaddr, utf8string(host)));
end
function ssl_config:from_prosody(hosts, config, certhosts)
-- TODO Decide if this should go elsewhere
local found_matching_hosts = false;
for i = 1,#certhosts do
local certhost = certhosts[i];
for name in pairs(hosts) do
if name == certhost or name:sub(-1-#certhost) == "."..certhost then
found_matching_hosts = true;
self:add_dNSName(name);
--print(name .. "#component_module: " .. (config.get(name, "component_module") or "nil"));
if config.get(name, "component_module") == nil then
self:add_sRVName(name, "xmpp-client");
end
--print(name .. "#anonymous_login: " .. tostring(config.get(name, "anonymous_login")));
if not (config.get(name, "anonymous_login") or
config.get(name, "authentication") == "anonymous") then
self:add_sRVName(name, "xmpp-server");
end
self:add_xmppAddr(name);
end
end
end
if not found_matching_hosts then
return nil, "no-matching-hosts";
end
end
do -- Lua to shell calls.
local function shell_escape(s)
return "'" .. tostring(s):gsub("'",[['\'']]) .. "'";
end
local function serialize(f,o)
local r = {"openssl", f};
for k,v in pairs(o) do
if type(k) == "string" then
t_insert(r, ("-%s"):format(k));
if v ~= true then
t_insert(r, shell_escape(v));
end
end
end
for _,v in ipairs(o) do
t_insert(r, shell_escape(v));
end
return t_concat(r, " ");
end
local os_execute = os.execute;
setmetatable(_M, {
__index=function(_,f)
return function(opts)
return 0 == os_execute(serialize(f, type(opts) == "table" and opts or {}));
end;
end;
});
end
return _M;
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