Re: Tracing of SMTP session?

[Kazuhiro Ito <kzhr@d1.dion.ne.jp>]

Hi,

> Now it turns out that whenever I sign a message with an attachment
> (pdf file ~1.0MB base64 encoding) wanderlust hangs.

Wanderlust (SEMI-EPG, strictly) does not hangs but takes too much
time.  Please try the below definition of mime-edit-sign-pgp-mime
function.

(defun mime-edit-sign-pgp-mime (beg end boundary)
  (save-excursion
    (save-restriction
      (let* ((ret (let ((mime-transfer-level 7))
		    (narrow-to-region beg end)
		    (mime-edit-translate-region beg end boundary)))
	     (ctype    (car ret))
	     (encoding (nth 1 ret))
	     (pgp-boundary (concat "pgp-sign-" boundary))
	     (context (epg-make-context))
	     index plain signature micalg)
	(mime-edit-delete-trailing-whitespace) ; RFC3156
	(goto-char beg)
	(insert (format "Content-Type: %s\n" ctype))
	(if encoding
	    (insert (format "Content-Transfer-Encoding: %s\n" encoding))
	  )
	(insert "\n")
	(epg-context-set-armor context t)
	(epg-context-set-textmode context nil)
	(epg-context-set-signers
	 context
	 (mime-edit-pgp-get-signers context))
	(goto-char (point-min))
	(setq index (point))
	(while (re-search-forward "\r?\n" nil t)
	  (setq plain (cons "\r\n"
			    (cons (buffer-substring index (match-beginning 0))
				  plain))
		index (match-end 0)))
	(setq plain
	      (apply 'concat (nreverse
			      (cons (buffer-substring index (point-max))
				    plain))))
	(setq signature (epg-sign-string context plain 'detached))
	(setq micalg (epg-new-signature-digest-algorithm
		      (car (epg-context-result-for context 'sign))))
	(goto-char beg)
	(insert (format "

--%s
"
			pgp-boundary
			(if micalg
			    (concat "; micalg=pgp-"
				    (downcase
				     (cdr (assq micalg
						epg-digest-algorithm-alist))))
			  "")
			pgp-boundary))
	(goto-char (point-max))
	(insert (format "\n--%s
Content-Type: application/pgp-signature
Content-Transfer-Encoding: 7bit
Content-Description: OpenPGP Digital Signature

" pgp-boundary))
	(insert signature)
	(goto-char (point-max))
	(insert (format "\n--%s--\n" pgp-boundary))
	))))

-- 
Kazuhiro Ito