;;; smime.el --- S/MIME support library
-;; Copyright (c) 2000, 2001, 2003 Free Software Foundation, Inc.
+
+;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
+;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: Simon Josefsson <simon@josefsson.org>
;; Keywords: SMIME X.509 PEM OpenSSL
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published
-;; by the Free Software Foundation; either version 2, or (at your
-;; option) any later version.
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
-;; GNU Emacs is distributed in the hope that it will be useful, but
-;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-;; General Public License for more details.
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This library perform S/MIME operations from within Emacs.
;;
;; Functions for fetching certificates from public repositories are
-;; provided, currently only from DNS. LDAP support (via EUDC) is planned.
+;; provided, currently from DNS and LDAP.
;;
;; It uses OpenSSL (tested with version 0.9.5a and 0.9.6) for signing,
;; encryption and decryption.
;; 2000-06-05 initial version, committed to Gnus CVS contrib/
;; 2000-10-28 retrieve certificates via DNS CERT RRs
;; 2001-10-14 posted to gnu.emacs.sources
+;; 2005-02-13 retrieve certificates via LDAP
;;; Code:
+;; For Emacs < 22.2.
+(eval-and-compile
+ (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
(require 'dig)
+
+(if (locate-library "password-cache")
+ (require 'password-cache)
+ (require 'password))
+
(eval-when-compile (require 'cl))
+(eval-and-compile
+ (cond
+ ((fboundp 'replace-in-string)
+ (defalias 'smime-replace-in-string 'replace-in-string))
+ ((fboundp 'replace-regexp-in-string)
+ (defun smime-replace-in-string (string regexp newtext &optional literal)
+ "Replace all matches for REGEXP with NEWTEXT in STRING.
+If LITERAL is non-nil, insert NEWTEXT literally. Return a new
+string containing the replacements.
+
+This is a compatibility function for different Emacsen."
+ (replace-regexp-in-string regexp newtext string nil literal)))))
+
(defgroup smime nil
- "S/MIME configuration.")
+ "S/MIME configuration."
+ :group 'mime)
(defcustom smime-keys nil
"*Map mail addresses to a file containing Certificate (and private key).
string)
:group 'smime)
+(defcustom smime-ldap-host-list nil
+ "A list of LDAP hosts with S/MIME user certificates.
+If needed search base, binddn, passwd, etc. for the LDAP host
+must be set in `ldap-host-parameters-alist'."
+ :type '(repeat (string :tag "Host name"))
+ :version "23.1" ;; No Gnus
+ :group 'smime)
+
(defvar smime-details-buffer "*OpenSSL output*")
;; Use mm-util?
temporary-file-directory))))))
;; Password dialog function
+(declare-function password-read-and-add "password-cache" (prompt &optional key))
-(defun smime-ask-passphrase ()
- "Asks the passphrase to unlock the secret key."
+(defun smime-ask-passphrase (&optional cache-key)
+ "Asks the passphrase to unlock the secret key.
+If `cache-key' and `password-cache' is non-nil then cache the
+password under `cache-key'."
(let ((passphrase
- (read-passwd
- "Passphrase for secret key (RET for no passphrase): ")))
+ (password-read-and-add
+ "Passphrase for secret key (RET for no passphrase): " cache-key)))
(if (string= passphrase "")
nil
passphrase)))
included, KEYFILE may be the file containing the PEM encoded private
key and certificate itself."
(smime-new-details-buffer)
- (let ((keyfile (or (car-safe keyfile) keyfile))
- (certfiles (and (cdr-safe keyfile) (cadr keyfile)))
- (buffer (generate-new-buffer (generate-new-buffer-name " *smime*")))
- (passphrase (smime-ask-passphrase))
- (tmpfile (smime-make-temp-file "smime")))
+ (let* ((certfiles (and (cdr-safe keyfile) (cadr keyfile)))
+ (keyfile (or (car-safe keyfile) keyfile))
+ (buffer (generate-new-buffer " *smime*"))
+ (passphrase (smime-ask-passphrase (expand-file-name keyfile)))
+ (tmpfile (smime-make-temp-file "smime")))
(if passphrase
(setenv "GNUS_SMIME_PASSPHRASE" passphrase))
(prog1
have proper MIME tags. CERTFILES is a list of filenames, each file
is expected to contain of a PEM encoded certificate."
(smime-new-details-buffer)
- (let ((buffer (generate-new-buffer (generate-new-buffer-name " *smime*")))
+ (let ((buffer (generate-new-buffer " *smime*"))
(tmpfile (smime-make-temp-file "smime")))
(prog1
(when (prog1
KEYFILE should contain a PEM encoded key and certificate."
(interactive)
(with-current-buffer (or buffer (current-buffer))
- (smime-sign-region
- (point-min) (point-max)
- (if keyfile
- keyfile
- (smime-get-key-with-certs-by-email
- (completing-read
- (concat "Sign using which key? "
- (if smime-keys (concat "(default " (caar smime-keys) ") ")
- ""))
- smime-keys nil nil (car-safe (car-safe smime-keys))))))))
+ (unless (smime-sign-region
+ (point-min) (point-max)
+ (if keyfile
+ keyfile
+ (smime-get-key-with-certs-by-email
+ (completing-read
+ (concat "Sign using key"
+ (if smime-keys
+ (concat " (default " (caar smime-keys) "): ")
+ ": "))
+ smime-keys nil nil (car-safe (car-safe smime-keys))))))
+ (error "Signing failed"))))
(defun smime-encrypt-buffer (&optional certfiles buffer)
"S/MIME encrypt BUFFER for recipients specified in CERTFILES.
nil."
(interactive)
(with-current-buffer (or buffer (current-buffer))
- (smime-encrypt-region
- (point-min) (point-max)
- (or certfiles
- (list (read-file-name "Recipient's S/MIME certificate: "
- smime-certificate-directory nil))))))
+ (unless (smime-encrypt-region
+ (point-min) (point-max)
+ (or certfiles
+ (list (read-file-name "Recipient's S/MIME certificate: "
+ smime-certificate-directory nil))))
+ (error "Encryption failed"))))
;; Verify+decrypt region
(insert-buffer-substring smime-details-buffer)
nil))
-(eval-when-compile
- (defvar from))
+(defvar from)
(defun smime-decrypt-region (b e keyfile)
"Decrypt S/MIME message in region between B and E with key in KEYFILE.
Any details (stderr on success, stdout and stderr on error) are left
in the buffer specified by `smime-details-buffer'."
(smime-new-details-buffer)
- (let ((buffer (generate-new-buffer (generate-new-buffer-name " *smime*")))
- CAs (passphrase (smime-ask-passphrase))
+ (let ((buffer (generate-new-buffer " *smime*"))
+ CAs (passphrase (smime-ask-passphrase (expand-file-name keyfile)))
(tmpfile (smime-make-temp-file "smime")))
(if passphrase
(setenv "GNUS_SMIME_PASSPHRASE" passphrase))
(or keyfile
(smime-get-key-by-email
(completing-read
- (concat "Decipher using which key? "
- (if smime-keys (concat "(default " (caar smime-keys) ") ")
- ""))
+ (concat "Decipher using key"
+ (if smime-keys (concat " (default " (caar smime-keys) "): ")
+ ": "))
smime-keys nil nil (car-safe (car-safe smime-keys)))))))))
;; Various operations
mailaddr))
(defun smime-cert-by-dns (mail)
+ "Find certificate via DNS for address MAIL."
(let* ((dig-dns-server smime-dns-server)
(digbuf (dig-invoke (smime-mail-to-domain mail) "cert" nil nil "+vc"))
(retbuf (generate-new-buffer (format "*certificate for %s*" mail)))
(kill-buffer digbuf)
retbuf))
+(defun smime-cert-by-ldap-1 (mail host)
+ "Get cetificate for MAIL from the ldap server at HOST."
+ (let ((ldapresult
+ (funcall
+ (if (or (featurep 'xemacs)
+ ;; For Emacs >= 22 we don't need smime-ldap.el
+ (< emacs-major-version 22))
+ (progn
+ (require 'smime-ldap)
+ 'smime-ldap-search)
+ 'ldap-search)
+ (concat "mail=" mail)
+ host '("userCertificate") nil))
+ (retbuf (generate-new-buffer (format "*certificate for %s*" mail)))
+ cert)
+ (if (and (>= (length ldapresult) 1)
+ (> (length (cadaar ldapresult)) 0))
+ (with-current-buffer retbuf
+ ;; Certificates on LDAP servers _should_ be in DER format,
+ ;; but there are some servers out there that distributes the
+ ;; certificates in PEM format (with or without
+ ;; header/footer) so we try to handle them anyway.
+ (if (or (string= (substring (cadaar ldapresult) 0 27)
+ "-----BEGIN CERTIFICATE-----")
+ (string= (substring (cadaar ldapresult) 0 3)
+ "MII"))
+ (setq cert
+ (smime-replace-in-string
+ (cadaar ldapresult)
+ (concat "\\(\n\\|\r\\|-----BEGIN CERTIFICATE-----\\|"
+ "-----END CERTIFICATE-----\\)")
+ "" t))
+ (setq cert (base64-encode-string (cadaar ldapresult) t)))
+ (insert "-----BEGIN CERTIFICATE-----\n")
+ (let ((i 0) (len (length cert)))
+ (while (> (- len 64) i)
+ (insert (substring cert i (+ i 64)) "\n")
+ (setq i (+ i 64)))
+ (insert (substring cert i len) "\n"))
+ (insert "-----END CERTIFICATE-----\n"))
+ (kill-buffer retbuf)
+ (setq retbuf nil))
+ retbuf))
+
+(defun smime-cert-by-ldap (mail)
+ "Find certificate via LDAP for address MAIL."
+ (if smime-ldap-host-list
+ (catch 'certbuf
+ (dolist (host smime-ldap-host-list)
+ (let ((retbuf (smime-cert-by-ldap-1 mail host)))
+ (when retbuf
+ (throw 'certbuf retbuf)))))))
+
;; User interface.
(defvar smime-buffer "*SMIME*")
(define-key smime-mode-map "q" 'smime-exit)
(define-key smime-mode-map "f" 'smime-certificate-info))
+(autoload 'gnus-run-mode-hooks "gnus-util")
+
(defun smime-mode ()
"Major mode for browsing, viewing and fetching certificates.
(use-local-map smime-mode-map)
(buffer-disable-undo)
(setq truncate-lines t)
- (setq buffer-read-only t))
+ (setq buffer-read-only t)
+ (gnus-run-mode-hooks 'smime-mode-hook))
(defun smime-certificate-info (certfile)
(interactive "fCertificate file: ")
(provide 'smime)
-;;; arch-tag: e3f9b938-5085-4510-8a11-6625269c9a9e
+;; arch-tag: e3f9b938-5085-4510-8a11-6625269c9a9e
;;; smime.el ends here
projects / gnus / blobdiff