+;;; Message stamping and validation
+;;
+
+(define (get-local-addresses config)
+ (map (lambda (p) (cons
+ (conc "<" (car p) "@" (config-host config) ">")
+ (cdr p)))
+ (map (lambda (file)
+ (list (pathname-file file) file
+ (let ((password-file (conc file ".auth")))
+ (if (file-exists? password-file)
+ (with-input-from-file password-file read-line)
+ #f))))
+ (filter directory-exists?
+ (glob (conc (config-spool-dir config) "/*"))))))
+
+(define (message-stamp msg config)
+ (let* ((local-addresses (get-local-addresses config))
+ (local-dest (assoc (message-to msg) local-addresses))
+ (local-src (assoc (message-from msg) local-addresses)))
+ (cond
+ (local-dest
+ (list #t 'local (cadr local-dest)))
+ (local-src
+ (let ((password (caddr local-src)))
+ (if (and (string=? (conc "<" (message-user msg) "@" (config-host config) ">")
+ (message-from msg))
+ password
+ (string=? (message-password msg) password))
+ (list #t 'remote)
+ (begin
+ (print "Provided password " (message-password msg))
+ (print "Host password " password)
+ (list #f 'remote)))))
+ (else
+ (list #f 'relay)))))
+
+(define (message-valid? msg config)
+ (let ((stamp (message-stamp msg config)))
+ (print "Stamp: " stamp)
+ (car stamp)))
+
+