diff options
Diffstat (limited to 'lisp/gnus/smime.el')
| -rw-r--r-- | lisp/gnus/smime.el | 102 |
1 files changed, 83 insertions, 19 deletions
diff --git a/lisp/gnus/smime.el b/lisp/gnus/smime.el index 62d1f27b4b5..ee62fd8124b 100644 --- a/lisp/gnus/smime.el +++ b/lisp/gnus/smime.el @@ -28,7 +28,7 @@ ;; 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. @@ -117,12 +117,28 @@ ;; 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: (require 'dig) +(require 'smime-ldap) +(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." :group 'mime) @@ -218,6 +234,14 @@ If nil, use system defaults." 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 "23.0" ;; No Gnus + :group 'smime) + (defvar smime-details-buffer "*OpenSSL output*") ;; Use mm-util? @@ -234,11 +258,13 @@ If nil, use system defaults." ;; Password dialog function -(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))) @@ -270,11 +296,11 @@ certificates to include in its caar. If no additional certificates is 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 (generate-new-buffer-name " *smime*"))) + (passphrase (smime-ask-passphrase (expand-file-name keyfile))) + (tmpfile (smime-make-temp-file "smime"))) (if passphrase (setenv "GNUS_SMIME_PASSPHRASE" passphrase)) (prog1 @@ -408,7 +434,7 @@ 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)) + CAs (passphrase (smime-ask-passphrase (expand-file-name keyfile))) (tmpfile (smime-make-temp-file "smime"))) (if passphrase (setenv "GNUS_SMIME_PASSPHRASE" passphrase)) @@ -521,20 +547,13 @@ A string or a list of strings is returned." (caddr curkey) (smime-get-certfiles keyfile otherkeys))))) -;; Use mm-util? -(eval-and-compile - (defalias 'smime-point-at-eol - (if (fboundp 'point-at-eol) - 'point-at-eol - 'line-end-position))) - (defun smime-buffer-as-string-region (b e) "Return each line in region between B and E as a list of strings." (save-excursion (goto-char b) (let (res) (while (< (point) e) - (let ((str (buffer-substring (point) (smime-point-at-eol)))) + (let ((str (buffer-substring (point) (point-at-eol)))) (unless (string= "" str) (push str res))) (forward-line)) @@ -548,6 +567,7 @@ A string or a list of strings is returned." 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))) @@ -568,6 +588,50 @@ A string or a list of strings is returned." (kill-buffer digbuf) retbuf)) +(defun smime-cert-by-ldap-1 (mail host) + "Get cetificate for MAIL from the ldap server at HOST." + (let ((ldapresult (smime-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*") |