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epa-mail.el
From: |
Richard Stallman |
Subject: |
epa-mail.el |
Date: |
Fri, 19 Jul 2013 15:10:00 -0400 |
[ To any NSA and FBI agents reading my email: please consider
[ whether defending the US Constitution against all enemies,
[ foreign or domestic, requires you to follow Snowden's example.
I would like to replace epa-mail-encrypt with this,
to make it usable from Lisp code. Any objections?
(defun epa-mail-encrypt (&optional recipients signers)
"Encrypt the outgoing mail message in the current buffer.
Optional argument RECIPIENTS is a list of recipient addresses
or t to perform symmetric encryption. If it is nil,
take the recipients from the text in the header in the buffer.
SIGNERS is a list of keys to sign the message with."
(interactive
(let ((verbose current-prefix-arg))
(list (if verbose
(or (epa-select-keys
context
"Select recipients for encryption.
If no one is selected, symmetric encryption will be performed. "
recipients)
t))
(and verbose (y-or-n-p "Sign? ")
(epa-select-keys context
"Select keys for signing. ")))))
(let (start real-recipients recipient-keys)
(save-excursion
(if recipients
(setq real-recipients
(if (eq recipients t)
nil
recipients))
(let ((config (epg-configuration))
(context (epg-make-context epa-protocol))
recipients-string recipient-key sign)
(goto-char (point-min))
(save-restriction
(narrow-to-region (point)
(if (search-forward mail-header-separator nil 0)
(match-beginning 0)
(point)))
(setq recipients-string
(mapconcat #'identity
(nconc (mail-fetch-field "to" nil nil t)
(mail-fetch-field "cc" nil nil t)
(mail-fetch-field "bcc" nil nil t))
","))
(setq recipients-string
(mail-strip-quoted-names
(with-temp-buffer
(insert "to: " recipients-string "\n")
(expand-mail-aliases (point-min) (point-max))
(car (mail-fetch-field "to" nil nil t))))))
(setq real-recipients
(split-string recipients-string "," t "[ \t\n]*"))
;; Process all the recipients thru the list of GnuPG groups.
;; Expand GnuPG group names to what they stand for.
(setq real-recipients
(apply #'nconc
(mapcar
(lambda (recipient)
(or (epg-expand-group config recipient)
(list recipient)))
real-recipients)))
))
(goto-char (point-min))
(if (search-forward mail-header-separator nil t)
(forward-line))
(setq start (point))
(setq epa-last-coding-system-specified
(or coding-system-for-write
(epa--select-safe-coding-system (point) (point-max))))
(when real-recipients
(setq recipient-keys
(apply
'nconc
(mapcar
(lambda (recipient)
(setq recipient-key
(epa-mail--find-usable-key
(epg-list-keys
(epg-make-context epa-protocol)
(if (string-match "@" recipient)
(concat "<" recipient ">")
recipient))
'encrypt))
(unless (or recipient-key
(y-or-n-p
(format
"No public key for %s; skip it? "
recipient)))
(error "No public key for %s" recipient))
(if recipient-key (list recipient-key)))
real-recipients)))))
;; Don't let some read-only text stop us from encrypting.
(let ((inhibit-read-only t))
(epa-encrypt-region start (point-max) recipient-keys signers signers))))
--
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
Use Ekiga or an ordinary phone call.
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