protocols/smtp/client-authentication.lisp

   1 ;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Indent-tabs-mode: NIL -*-
   2 ;;;
   3 ;;; client-authentication.lisp --- SMTP authentication.
   4 ;;;
   5 ;;; Copyright (C) 2007-2008, Stelian Ionescu  <sionescu@common-lisp.net>
   6 ;;;
   7 ;;; This code is free software; you can redistribute it and/or
   8 ;;; modify it under the terms of the version 2.1 of
   9 ;;; the GNU Lesser General Public License as published by
  10 ;;; the Free Software Foundation, as clarified by the
  11 ;;; preamble found here:
  12 ;;;     http://opensource.franz.com/preamble.html
  13 ;;;
  14 ;;; This program is distributed in the hope that it will be useful,
  15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;;; GNU General Public License for more details.
  18 ;;;
  19 ;;; You should have received a copy of the GNU Lesser General
  20 ;;; Public License along with this library; if not, write to the
  21 ;;; Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  22 ;;; Boston, MA 02110-1301, USA
  23
  24 (in-package :net.smtp-client)
  25
  26 (eval-when (:compile-toplevel :load-toplevel :execute)
  27   (defvar *smtp-authenticators* (make-hash-table :test #'eq)))
  28
  29 (defun invoke-authentication (name args)
  30   (check-type args cons)
  31   (let ((auth-fun (gethash name *smtp-authenticators*)))
  32     (if auth-fun
  33         (funcall auth-fun args)
  34         (error "Unknown authentication method: ~A" name))))
  35
  36 (defmacro defauthentication (name (socket args) &body body)
  37   `(setf (gethash ,name *smtp-authenticators*)
  38          #'(lambda (,socket ,args)
  39              ,@body)))
  40
  41 (defauthentication :plain (sock args)
  42   (format-socket sock "AUTH PLAIN ~A"
  43                  (string-to-base64-string
  44                   (format nil "~A~C~A~C~A" (first args)
  45                           #\Null (first args) #\Null
  46                           (second args))))
  47   (read-smtp-return-code sock 235 "Plain authentication failed"))
  48
  49 (defauthentication :login (sock args)
  50   (write-to-smtp sock "AUTH LOGIN")
  51   (read-smtp-return-code sock 334 "Login authentication start failed")
  52   (write-to-smtp sock (string-to-base64-string (first args)))
  53   (read-smtp-return-code sock 334 "Login authentication username send failed")
  54   (write-to-smtp sock (string-to-base64-string (second args)))
  55   (read-smtp-return-code sock 235 "Login authentication password send failed"))