plugins/mod_s2s_auth_certs.lua

   1 module:set_global();
   2
   3 local cert_verify_identity = require "util.x509".verify_identity;
   4 local NULL = {};
   5 local log = module._log;
   6
   7 module:hook("s2s-check-certificate", function(event)
   8         local session, host, cert = event.session, event.host, event.cert;
   9         local conn = session.conn:socket();
  10         local log = session.log or log;
  11
  12         if not cert then
  13                 log("warn", "No certificate provided by %s", host or "unknown host");
  14                 return;
  15         end
  16
  17         local chain_valid, errors;
  18         if conn.getpeerverification then
  19                 chain_valid, errors = conn:getpeerverification();
  20         else
  21                 chain_valid, errors = false, { { "Chain verification not supported by this version of LuaSec" } };
  22         end
  23         -- Is there any interest in printing out all/the number of errors here?
  24         if not chain_valid then
  25                 log("debug", "certificate chain validation result: invalid");
  26                 for depth, t in pairs(errors or NULL) do
  27                         log("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", "))
  28                 end
  29                 session.cert_chain_status = "invalid";
  30         else
  31                 log("debug", "certificate chain validation result: valid");
  32                 session.cert_chain_status = "valid";
  33
  34                 -- We'll go ahead and verify the asserted identity if the
  35                 -- connecting server specified one.
  36                 if host then
  37                         if cert_verify_identity(host, "xmpp-server", cert) then
  38                                 session.cert_identity_status = "valid"
  39                         else
  40                                 session.cert_identity_status = "invalid"
  41                         end
  42                         log("debug", "certificate identity validation result: %s", session.cert_identity_status);
  43                 end
  44         end
  45 end, 509);
  46