From 7c7bf55c3a51913cd0b9a8e94941e3177af943fe Mon Sep 17 00:00:00 2001
From: plugd <plugd@tiny.fimnet>
Date: Thu, 3 Nov 2022 09:46:18 +0100
Subject: [PATCH] Working on starttls implementation.

---
 lambdamail.scm | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lambdamail.scm b/lambdamail.scm
index 7d37b30..7caf27e 100644
--- a/lambdamail.scm
+++ b/lambdamail.scm
@@ -2,7 +2,7 @@
 ;;
 ;; Intended for a single-user system 
 
-(import tcp6
+(import tcp6 openssl
         (chicken port)
         (chicken io)
         (chicken string)
@@ -118,8 +118,18 @@
                           "250-" (config-host config)
                           " Hello " (smtp-command-args "ehlo" line))
             (smtp-session 'send "250 AUTH PLAIN")
-            ;; (smtp-session 'send "250 STARTTLS")
+            (smtp-session 'send "250 STARTTLS")
             (loop mmsg received-messages))
+           ((smtp-command? "starttls" line)
+            (let ((args (smtp-command-args "starttls" line)))
+              (if (= 0 (string-length args))
+                  (smtp-session 'send "501 Syntax error (no parameters allowed)")
+                  (begin
+                    (smtp-session 'send "220 Ready to start TLS")
+
+                    ;; TODO: initiate TLS handshake using (ssl-start*)
+
+                    ))))
            ((smtp-command? "auth plain" line)
             (let* ((auth-string (smtp-command-args "auth plain" line))
                    (auth-decoded (base64-decode auth-string))
-- 
2.20.1