2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
9 local configmanager = require "core.configmanager";
10 local log = require "util.logger".init("certmanager");
12 local ssl_newcontext = ssl and ssl.newcontext;
13 local new_config = require"util.sslconfig".new;
15 local tostring = tostring;
18 local io_open = io.open;
19 local select = select;
21 local prosody = prosody;
22 local resolve_path = require"util.paths".resolve_relative_path;
23 local config_path = prosody.paths.config;
25 local luasec_has_noticket, luasec_has_verifyext, luasec_has_no_compression;
27 local luasec_major, luasec_minor = ssl._VERSION:match("^(%d+)%.(%d+)");
28 luasec_has_noticket = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=4;
29 luasec_has_verifyext = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5;
30 luasec_has_no_compression = tonumber(luasec_major)>0 or tonumber(luasec_minor)>=5;
35 -- Global SSL options if not overridden per-host
36 local global_ssl_config = configmanager.get("*", "ssl");
39 local core_defaults = {
40 capath = "/etc/ssl/certs";
42 verify = (ssl and ssl.x509 and { "peer", "client_once", }) or "none";
44 cipher_server_preference = true;
45 no_ticket = luasec_has_noticket;
46 no_compression = luasec_has_no_compression and configmanager.get("*", "ssl_compression") ~= true;
47 -- Has no_compression? Then it has these too...
48 single_dh_use = luasec_has_no_compression;
49 single_ecdh_use = luasec_has_no_compression;
51 verifyext = { "lsec_continue", "lsec_ignore_purpose" };
53 ciphers = "HIGH+kEDH:HIGH+kEECDH:HIGH:!PSK:!SRP:!3DES:!aNULL";
55 local path_options = { -- These we pass through resolve_path()
56 key = true, certificate = true, cafile = true, capath = true, dhparam = true
59 if ssl and not luasec_has_verifyext and ssl.x509 then
60 -- COMPAT mw/luasec-hg
61 for i=1,#core_defaults.verifyext do -- Remove lsec_ prefix
62 core_defaults.verify[#core_defaults.verify+1] = core_defaults.verifyext[i]:sub(6);
66 function create_context(host, mode, ...)
67 if not ssl then return nil, "LuaSec (required for encryption) was not found"; end
69 local cfg = new_config();
70 cfg:apply(core_defaults);
71 cfg:apply(global_ssl_config);
74 -- We can't read the password interactively when daemonized
75 password = function() log("error", "Encrypted certificate for %s requires 'ssl' 'password' to be set in config", host); end;
78 for i = select('#', ...), 1, -1 do
79 cfg:apply(select(i, ...));
81 local user_ssl_config = cfg:final();
83 if mode == "server" then
84 if not user_ssl_config.key then return nil, "No key present in SSL/TLS configuration for "..host; end
85 if not user_ssl_config.certificate then return nil, "No certificate present in SSL/TLS configuration for "..host; end
88 for option in pairs(path_options) do
89 if type(user_ssl_config[option]) == "string" then
90 user_ssl_config[option] = resolve_path(config_path, user_ssl_config[option]);
94 -- LuaSec expects dhparam to be a callback that takes two arguments.
95 -- We ignore those because it is mostly used for having a separate
96 -- set of params for EXPORT ciphers, which we don't have by default.
97 if type(user_ssl_config.dhparam) == "string" then
98 local f, err = io_open(user_ssl_config.dhparam);
99 if not f then return nil, "Could not open DH parameters: "..err end
100 local dhparam = f:read("*a");
102 user_ssl_config.dhparam = function() return dhparam; end
105 local ctx, err = ssl_newcontext(user_ssl_config);
107 -- COMPAT Older LuaSec ignores the cipher list from the config, so we have to take care
108 -- of it ourselves (W/A for #x)
109 if ctx and user_ssl_config.ciphers then
111 success, err = ssl.context.setcipher(ctx, user_ssl_config.ciphers);
112 if not success then ctx = nil; end
116 err = err or "invalid ssl config"
117 local file = err:match("^error loading (.-) %(");
119 if file == "private key" then
120 file = user_ssl_config.key or "your private key";
121 elseif file == "certificate" then
122 file = user_ssl_config.certificate or "your certificate file";
124 local reason = err:match("%((.+)%)$") or "some reason";
125 if reason == "Permission denied" then
126 reason = "Check that the permissions allow Prosody to read this file.";
127 elseif reason == "No such file or directory" then
128 reason = "Check that the path is correct, and the file exists.";
129 elseif reason == "system lib" then
130 reason = "Previous error (see logs), or other system error.";
131 elseif reason == "(null)" or not reason then
132 reason = "Check that the file exists and the permissions are correct";
134 reason = "Reason: "..tostring(reason):lower();
136 log("error", "SSL/TLS: Failed to load '%s': %s (for %s)", file, reason, host);
138 log("error", "SSL/TLS: Error initialising for %s: %s", host, err);
141 return ctx, err, user_ssl_config;
144 function reload_ssl_config()
145 global_ssl_config = configmanager.get("*", "ssl");
146 if luasec_has_no_compression then
147 core_defaults.options.no_compression = configmanager.get("*", "ssl_compression") ~= true;
151 prosody.events.add_handler("config-reloaded", reload_ssl_config);