core/certmanager.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9 local configmanager = require "core.configmanager";
  10 local log = require "util.logger".init("certmanager");
  11 local ssl = ssl;
  12 local ssl_newcontext = ssl and ssl.newcontext;
  13
  14 local setmetatable, tostring = setmetatable, tostring;
  15
  16 local prosody = prosody;
  17 local resolve_path = configmanager.resolve_relative_path;
  18 local config_path = prosody.paths.config;
  19
  20 module "certmanager"
  21
  22 -- Global SSL options if not overridden per-host
  23 local default_ssl_config = configmanager.get("*", "core", "ssl");
  24 local default_capath = "/etc/ssl/certs";
  25 local default_verify = (ssl and ssl.x509 and { "peer", "client_once", "continue", "ignore_purpose" }) or "none";
  26 local default_options = { "no_sslv2" };
  27
  28 function create_context(host, mode, user_ssl_config)
  29         user_ssl_config = user_ssl_config or default_ssl_config;
  30
  31         if not ssl then return nil, "LuaSec (required for encryption) was not found"; end
  32         if not user_ssl_config then return nil, "No SSL/TLS configuration present for "..host; end
  33
  34         local ssl_config = {
  35                 mode = mode;
  36                 protocol = user_ssl_config.protocol or "sslv23";
  37                 key = resolve_path(config_path, user_ssl_config.key);
  38                 password = user_ssl_config.password;
  39                 certificate = resolve_path(config_path, user_ssl_config.certificate);
  40                 capath = resolve_path(config_path, user_ssl_config.capath or default_capath);
  41                 cafile = resolve_path(config_path, user_ssl_config.cafile);
  42                 verify = user_ssl_config.verify or default_verify;
  43                 options = user_ssl_config.options or default_options;
  44                 ciphers = user_ssl_config.ciphers;
  45                 depth = user_ssl_config.depth;
  46         };
  47
  48         local ctx, err = ssl_newcontext(ssl_config);
  49         if not ctx then
  50                 err = err or "invalid ssl config"
  51                 local file = err:match("^error loading (.-) %(");
  52                 if file then
  53                         if file == "private key" then
  54                                 file = ssl_config.key or "your private key";
  55                         elseif file == "certificate" then
  56                                 file = ssl_config.certificate or "your certificate file";
  57                         end
  58                         local reason = err:match("%((.+)%)$") or "some reason";
  59                         if reason == "Permission denied" then
  60                                 reason = "Check that the permissions allow Prosody to read this file.";
  61                         elseif reason == "No such file or directory" then
  62                                 reason = "Check that the path is correct, and the file exists.";
  63                         elseif reason == "system lib" then
  64                                 reason = "Previous error (see logs), or other system error.";
  65                         elseif reason == "(null)" or not reason then
  66                                 reason = "Check that the file exists and the permissions are correct";
  67                         else
  68                                 reason = "Reason: "..tostring(reason):lower();
  69                         end
  70                         log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
  71                 else
  72                         log("error", "SSL/TLS: Error initialising for host %s: %s", host, err );
  73                 end
  74         end
  75         return ctx, err;
  76 end
  77
  78 function reload_ssl_config()
  79         default_ssl_config = configmanager.get("*", "core", "ssl");
  80 end
  81
  82 prosody.events.add_handler("config-reloaded", reload_ssl_config);
  83
  84 return _M;