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-rw-r--r--plugins/mod_s2s_auth_certs.lua49
1 files changed, 49 insertions, 0 deletions
diff --git a/plugins/mod_s2s_auth_certs.lua b/plugins/mod_s2s_auth_certs.lua
new file mode 100644
index 00000000..dd0eb3cb
--- /dev/null
+++ b/plugins/mod_s2s_auth_certs.lua
@@ -0,0 +1,49 @@
+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();
+ elseif conn.getpeerchainvalid then -- COMPAT mw/luasec-hg
+ chain_valid, errors = conn:getpeerchainvalid();
+ errors = (not chain_valid) and { { errors } } or nil;
+ 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";
+ 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);
+