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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 configmanager = require "core.configmanager";
local log = require "util.logger".init("certmanager");
local ssl = ssl;
local ssl_newcontext = ssl and ssl.newcontext;
local tostring = tostring;
local type = type;
local io_open = io.open;
local prosody = prosody;
local resolve_path = configmanager.resolve_relative_path;
local config_path = prosody.paths.config;
local luasec_has_noticket, luasec_has_verifyext, luasec_has_no_compression;
if ssl then
local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)");
luasec_has_noticket = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=4;
luasec_has_verifyext = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5;
luasec_has_no_compression = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5;
end
module "certmanager"
-- Global SSL options if not overridden per-host
local default_ssl_config = configmanager.get("*", "ssl");
local default_capath = "/etc/ssl/certs";
local default_verify = (ssl and ssl.x509 and { "peer", "client_once", }) or "none";
local default_options = { "no_sslv2", "no_sslv3", luasec_has_noticket and "no_ticket" or nil, "cipher_server_preference" };
local default_verifyext = { "lsec_continue", "lsec_ignore_purpose" };
if ssl and not luasec_has_verifyext and ssl.x509 then
-- COMPAT mw/luasec-hg
for i=1,#default_verifyext do -- Remove lsec_ prefix
default_verify[#default_verify+1] = default_verifyext[i]:sub(6);
end
end
if luasec_has_no_compression and configmanager.get("*", "ssl_compression") ~= true then
default_options[#default_options+1] = "no_compression";
end
if luasec_has_no_compression then -- Has no_compression? Then it has these too...
default_options[#default_options+1] = "single_dh_use";
default_options[#default_options+1] = "single_ecdh_use";
end
function create_context(host, mode, user_ssl_config)
user_ssl_config = user_ssl_config or default_ssl_config;
if not ssl then return nil, "LuaSec (required for encryption) was not found"; end
if not user_ssl_config then return nil, "No SSL/TLS configuration present for "..host; end
local ssl_config = {
mode = mode;
protocol = user_ssl_config.protocol or "sslv23";
key = resolve_path(config_path, user_ssl_config.key);
password = user_ssl_config.password or function() log("error", "Encrypted certificate for %s requires 'ssl' 'password' to be set in config", host); end;
certificate = resolve_path(config_path, user_ssl_config.certificate);
capath = resolve_path(config_path, user_ssl_config.capath or default_capath);
cafile = resolve_path(config_path, user_ssl_config.cafile);
verify = user_ssl_config.verify or default_verify;
verifyext = user_ssl_config.verifyext or default_verifyext;
options = user_ssl_config.options or default_options;
depth = user_ssl_config.depth;
curve = user_ssl_config.curve or "secp384r1";
ciphers = user_ssl_config.ciphers or "HIGH:!DSS:!aNULL@STRENGTH";
dhparam = user_ssl_config.dhparam;
};
-- LuaSec expects dhparam to be a callback that takes two arguments.
-- We ignore those because it is mostly used for having a separate
-- set of params for EXPORT ciphers, which we don't have by default.
if type(ssl_config.dhparam) == "string" then
local f, err = io_open(resolve_path(config_path, ssl_config.dhparam));
if not f then return nil, "Could not open DH parameters: "..err end
local dhparam = f:read("*a");
f:close();
ssl_config.dhparam = function() return dhparam; end
end
local ctx, err = ssl_newcontext(ssl_config);
-- COMPAT: LuaSec 0.4.1 ignores the cipher list from the config, so we have to take
-- care of it ourselves...
if ctx and ssl_config.ciphers then
local success;
success, err = ssl.context.setcipher(ctx, ssl_config.ciphers);
if not success then ctx = nil; end
end
if not ctx then
err = err or "invalid ssl config"
local file = err:match("^error loading (.-) %(");
if file then
if file == "private key" then
file = ssl_config.key or "your private key";
elseif file == "certificate" then
file = ssl_config.certificate or "your certificate file";
end
local reason = err:match("%((.+)%)$") or "some reason";
if reason == "Permission denied" then
reason = "Check that the permissions allow Prosody to read this file.";
elseif reason == "No such file or directory" then
reason = "Check that the path is correct, and the file exists.";
elseif reason == "system lib" then
reason = "Previous error (see logs), or other system error.";
elseif reason == "(null)" or not reason then
reason = "Check that the file exists and the permissions are correct";
else
reason = "Reason: "..tostring(reason):lower();
end
log("error", "SSL/TLS: Failed to load '%s': %s (for %s)", file, reason, host);
else
log("error", "SSL/TLS: Error initialising for %s: %s", host, err);
end
end
return ctx, err;
end
function reload_ssl_config()
default_ssl_config = configmanager.get("*", "ssl");
end
prosody.events.add_handler("config-reloaded", reload_ssl_config);
return _M;
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