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 = prosody.resolve_relative_path;
  18
  19 module "certmanager"
  20
  21 -- Global SSL options if not overridden per-host
  22 local default_ssl_config = configmanager.get("*", "core", "ssl");
  23 local default_capath = "/etc/ssl/certs";
  24
  25 function create_context(host, mode, config)
  26         local user_ssl_config = config and config.core.ssl or default_ssl_config;
  27
  28         if not(ssl and user_ssl_config) then return nil; end
  29
  30         local ssl_config = {
  31                 mode = mode;
  32                 protocol = user_ssl_config.protocol or "sslv23";
  33                 key = resolve_path(user_ssl_config.key);
  34                 password = user_ssl_config.password;
  35                 certificate = resolve_path(user_ssl_config.certificate);
  36                 capath = resolve_path(user_ssl_config.capath or default_capath);
  37                 cafile = resolve_path(user_ssl_config.cafile);
  38                 verify = user_ssl_config.verify or "none";
  39                 options = user_ssl_config.options or "no_sslv2";
  40                 ciphers = user_ssl_config.ciphers;
  41                 depth = user_ssl_config.depth;
  42         };
  43
  44         local ctx, err = ssl_newcontext(ssl_config);
  45         if not ctx then
  46                 err = err or "invalid ssl config"
  47                 local file = err:match("^error loading (.-) %(");
  48                 if file then
  49                         if file == "private key" then
  50                                 file = ssl_config.key or "your private key";
  51                         elseif file == "certificate" then
  52                                 file = ssl_config.certificate or "your certificate file";
  53                         end
  54                         local reason = err:match("%((.+)%)$") or "some reason";
  55                         if reason == "Permission denied" then
  56                                 reason = "Check that the permissions allow Prosody to read this file.";
  57                         elseif reason == "No such file or directory" then
  58                                 reason = "Check that the path is correct, and the file exists.";
  59                         elseif reason == "system lib" then
  60                                 reason = "Previous error (see logs), or other system error.";
  61                         elseif reason == "(null)" or not reason then
  62                                 reason = "Check that the file exists and the permissions are correct";
  63                         else
  64                                 reason = "Reason: "..tostring(reason):lower();
  65                         end
  66                         log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
  67                 else
  68                         log("error", "SSL/TLS: Error initialising for host %s: %s", host, err );
  69                 end
  70                 ssl = false
  71         end
  72         return ctx, err;
  73 end
  74
  75 function reload_ssl_config()
  76         default_ssl_config = configmanager.get("*", "core", "ssl");
  77 end
  78
  79 prosody.events.add_handler("config-reloaded", reload_ssl_config);
  80
  81 return _M;