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
  26 function create_context(host, mode, user_ssl_config)
  27         user_ssl_config = user_ssl_config or default_ssl_config;
  28
  29         if not ssl then return nil, "LuaSec (required for encryption) was not found"; end
  30         if not user_ssl_config then return nil, "No SSL/TLS configuration present for "..host; end
  31
  32         local ssl_config = {
  33                 mode = mode;
  34                 protocol = user_ssl_config.protocol or "sslv23";
  35                 key = resolve_path(config_path, user_ssl_config.key);
  36                 password = user_ssl_config.password;
  37                 certificate = resolve_path(config_path, user_ssl_config.certificate);
  38                 capath = resolve_path(config_path, user_ssl_config.capath or default_capath);
  39                 cafile = resolve_path(config_path, user_ssl_config.cafile);
  40                 verify = user_ssl_config.verify or "none";
  41                 options = user_ssl_config.options or "no_sslv2";
  42                 ciphers = user_ssl_config.ciphers;
  43                 depth = user_ssl_config.depth;
  44         };
  45
  46         local ctx, err = ssl_newcontext(ssl_config);
  47         if not ctx then
  48                 err = err or "invalid ssl config"
  49                 local file = err:match("^error loading (.-) %(");
  50                 if file then
  51                         if file == "private key" then
  52                                 file = ssl_config.key or "your private key";
  53                         elseif file == "certificate" then
  54                                 file = ssl_config.certificate or "your certificate file";
  55                         end
  56                         local reason = err:match("%((.+)%)$") or "some reason";
  57                         if reason == "Permission denied" then
  58                                 reason = "Check that the permissions allow Prosody to read this file.";
  59                         elseif reason == "No such file or directory" then
  60                                 reason = "Check that the path is correct, and the file exists.";
  61                         elseif reason == "system lib" then
  62                                 reason = "Previous error (see logs), or other system error.";
  63                         elseif reason == "(null)" or not reason then
  64                                 reason = "Check that the file exists and the permissions are correct";
  65                         else
  66                                 reason = "Reason: "..tostring(reason):lower();
  67                         end
  68                         log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
  69                 else
  70                         log("error", "SSL/TLS: Error initialising for host %s: %s", host, err );
  71                 end
  72         end
  73         return ctx, err;
  74 end
  75
  76 function reload_ssl_config()
  77         default_ssl_config = configmanager.get("*", "core", "ssl");
  78 end
  79
  80 prosody.events.add_handler("config-reloaded", reload_ssl_config);
  81
  82 return _M;