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module:set_global();
local cert_verify_identity = require "util.x509".verify_identity;
local NULL = {};
local log = module._log;
module:hook("s2s-check-certificate", function(event)
local session, host, cert = event.session, event.host, event.cert;
local conn = session.conn:socket();
local log = session.log or log;
if not cert then
log("warn", "No certificate provided by %s", host or "unknown host");
return;
end
local chain_valid, errors;
if conn.getpeerverification then
chain_valid, errors = conn:getpeerverification();
else
chain_valid, errors = false, { { "Chain verification not supported by this version of LuaSec" } };
end
-- Is there any interest in printing out all/the number of errors here?
if not chain_valid then
log("debug", "certificate chain validation result: invalid");
for depth, t in pairs(errors or NULL) do
log("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", "))
end
session.cert_chain_status = "invalid";
session.cert_chain_errors = errors;
else
log("debug", "certificate chain validation result: valid");
session.cert_chain_status = "valid";
-- We'll go ahead and verify the asserted identity if the
-- connecting server specified one.
if host then
if cert_verify_identity(host, "xmpp-server", cert) then
session.cert_identity_status = "valid"
else
session.cert_identity_status = "invalid"
end
log("debug", "certificate identity validation result: %s", session.cert_identity_status);
end
end
end, 509);
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