(require 'mm-decode)
(require 'mm-util)
(require 'mml)
+(require 'password)
(defvar mc-pgp-always-sign)
mml2015-pgg-verify
mml2015-pgg-decrypt
mml2015-pgg-clear-verify
- mml2015-pgg-clear-decrypt))
+ mml2015-pgg-clear-decrypt)
+ (epg mml2015-epg-sign
+ mml2015-epg-encrypt
+ mml2015-epg-verify
+ mml2015-epg-decrypt
+ mml2015-epg-clear-verify
+ mml2015-epg-clear-decrypt))
"Alist of PGP/MIME functions.")
(defvar mml2015-result-buffer nil)
:type '(repeat (cons (regexp :tag "GnuPG output regexp")
(boolean :tag "Trust key"))))
+(defcustom mml2015-verbose nil
+ "If non-nil, ask the user about the current operation more verbosely."
+ :group 'mime-security
+ :type 'boolean)
+
+(defcustom mml2015-cache-passphrase t
+ "If t, cache passphrase."
+ :group 'mime-security
+ :type 'boolean)
+
+(defcustom mml2015-passphrase-cache-expiry 16
+ "How many seconds the passphrase is cached.
+Whether the passphrase is cached at all is controlled by
+`mml2015-cache-passphrase'."
+ :group 'mime-security
+ :type 'integer)
+
;;; mailcrypt wrapper
(eval-and-compile
(insert (format "--%s--\n" boundary))
(goto-char (point-max))))
+;;; epg wrapper
+
+(eval-and-compile
+ (autoload 'epg-make-context "epg")
+ (autoload 'epa-select-keys "epa"))
+
+(eval-when-compile
+ (defvar epg-user-id-alist)
+ (defvar epg-digest-algorithm-alist)
+ (defvar inhibit-redisplay)
+ (autoload 'epg-context-set-armor "epg")
+ (autoload 'epg-context-set-textmode "epg")
+ (autoload 'epg-context-set-signers "epg")
+ (autoload 'epg-context-result-for "epg")
+ (autoload 'epg-new-signature-digest-algorithm "epg")
+ (autoload 'epg-verify-result-to-string "epg")
+ (autoload 'epg-list-keys "epg")
+ (autoload 'epg-decrypt-string "epg")
+ (autoload 'epg-verify-string "epg")
+ (autoload 'epg-sign-string "epg")
+ (autoload 'epg-encrypt-string "epg")
+ (autoload 'epg-passphrase-callback-function "epg")
+ (autoload 'epg-context-set-passphrase-callback "epg"))
+
+(defvar mml2015-epg-secret-key-id-list nil)
+
+(defun mml2015-epg-passphrase-callback (context key-id ignore)
+ (if (eq key-id 'SYM)
+ (epg-passphrase-callback-function context key-id nil)
+ (let* ((entry (assoc key-id epg-user-id-alist))
+ (passphrase
+ (password-read
+ (format "GnuPG passphrase for %s: "
+ (if entry
+ (cdr entry)
+ key-id))
+ (if (eq key-id 'PIN)
+ "PIN"
+ key-id))))
+ (when passphrase
+ (let ((password-cache-expiry mml2015-passphrase-cache-expiry))
+ (password-cache-add key-id passphrase))
+ (setq mml2015-epg-secret-key-id-list
+ (cons key-id mml2015-epg-secret-key-id-list))
+ (copy-sequence passphrase)))))
+
+(defun mml2015-epg-decrypt (handle ctl)
+ (catch 'error
+ (let ((inhibit-redisplay t)
+ context plain child handles result decrypt-status)
+ (unless (setq child (mm-find-part-by-type
+ (cdr handle)
+ "application/octet-stream" nil t))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Corrupted")
+ (throw 'error handle))
+ (setq context (epg-make-context))
+ (epg-context-set-passphrase-callback
+ context
+ #'mml2015-epg-passphrase-callback)
+ (condition-case error
+ (setq plain (epg-decrypt-string context (mm-get-part child))
+ mml2015-epg-secret-key-id-list nil)
+ (error
+ (while mml2015-epg-secret-key-id-list
+ (password-cache-remove (car mml2015-epg-secret-key-id-list))
+ (setq mml2015-epg-secret-key-id-list
+ (cdr mml2015-epg-secret-key-id-list)))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Failed")
+ (if (eq (car error) 'quit)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details "Quit.")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details (mml2015-format-error error)))
+ (throw 'error handle)))
+ (with-temp-buffer
+ (insert plain)
+ (goto-char (point-min))
+ (while (search-forward "\r\n" nil t)
+ (replace-match "\n" t t))
+ (setq handles (mm-dissect-buffer t))
+ (mm-destroy-parts handle)
+ (if (epg-context-result-for context 'verify)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info
+ (concat "OK\n"
+ (epg-verify-result-to-string
+ (epg-context-result-for context 'verify))))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "OK"))
+ (if (stringp (car handles))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details
+ (mm-handle-multipart-ctl-parameter handles 'gnus-details))))
+ (if (listp (car handles))
+ handles
+ (list handles)))))
+
+(defun mml2015-epg-clear-decrypt ()
+ (let ((inhibit-redisplay t)
+ (context (epg-make-context))
+ plain)
+ (epg-context-set-passphrase-callback
+ context
+ #'mml2015-epg-passphrase-callback)
+ (condition-case error
+ (setq plain (epg-decrypt-string context (buffer-string))
+ mml2015-epg-secret-key-id-list nil)
+ (error
+ (while mml2015-epg-secret-key-id-list
+ (password-cache-remove (car mml2015-epg-secret-key-id-list))
+ (setq mml2015-epg-secret-key-id-list
+ (cdr mml2015-epg-secret-key-id-list)))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Failed")
+ (if (eq (car error) 'quit)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details "Quit.")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details (mml2015-format-error error)))))
+ (when plain
+ (erase-buffer)
+ ;; Treat data which epg returns as a unibyte string.
+ (mm-disable-multibyte)
+ (insert plain)
+ (goto-char (point-min))
+ (while (search-forward "\r\n" nil t)
+ (replace-match "\n" t t))
+ (if (epg-context-result-for context 'verify)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info
+ (concat "OK\n"
+ (epg-verify-result-to-string
+ (epg-context-result-for context 'verify))))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "OK")))))
+
+(defun mml2015-epg-verify (handle ctl)
+ (catch 'error
+ (let ((inhibit-redisplay t)
+ context plain signature-file part signature)
+ (when (or (null (setq part (mm-find-raw-part-by-type
+ ctl (or (mm-handle-multipart-ctl-parameter
+ ctl 'protocol)
+ "application/pgp-signature")
+ t)))
+ (null (setq signature (mm-find-part-by-type
+ (cdr handle) "application/pgp-signature"
+ nil t))))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Corrupted")
+ (throw 'error handle))
+ (setq context (epg-make-context))
+ (condition-case error
+ (setq plain (epg-verify-string context (mm-get-part signature) part))
+ (error
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Failed")
+ (if (eq (car error) 'quit)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details "Quit.")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details (mml2015-format-error error)))
+ (throw 'error handle)))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info
+ (epg-verify-result-to-string (epg-context-result-for context 'verify)))
+ handle)))
+
+(defun mml2015-epg-clear-verify ()
+ (let ((inhibit-redisplay t)
+ (context (epg-make-context))
+ (signature (encode-coding-string (buffer-string)
+ buffer-file-coding-system))
+ plain)
+ (condition-case error
+ (setq plain (epg-verify-string context signature))
+ (error
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Failed")
+ (if (eq (car error) 'quit)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details "Quit.")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details (mml2015-format-error error)))))
+ (if plain
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info
+ (epg-verify-result-to-string
+ (epg-context-result-for context 'verify))))))
+
+(defun mml2015-epg-sign (cont)
+ (let ((inhibit-redisplay t)
+ (context (epg-make-context))
+ (boundary (mml-compute-boundary cont))
+ signers signature micalg)
+ (if mml2015-verbose
+ (setq signers (epa-select-keys context "Select keys for signing.
+If no one is selected, default secret key is used. "
+ nil t))
+ (setq signers (list (car (epg-list-keys
+ context
+ (message-options-get 'mml-sender) t)))))
+ (epg-context-set-armor context t)
+ (epg-context-set-textmode context t)
+ (epg-context-set-signers context signers)
+ (epg-context-set-passphrase-callback
+ context
+ #'mml2015-epg-passphrase-callback)
+ (condition-case error
+ (setq signature (epg-sign-string context (buffer-string) t)
+ mml2015-epg-secret-key-id-list nil)
+ (error
+ (while mml2015-epg-secret-key-id-list
+ (password-cache-remove (car mml2015-epg-secret-key-id-list))
+ (setq mml2015-epg-secret-key-id-list
+ (cdr mml2015-epg-secret-key-id-list)))
+ (signal (car error) (cdr error))))
+ (if (epg-context-result-for context 'sign)
+ (setq micalg (epg-new-signature-digest-algorithm
+ (car (epg-context-result-for context 'sign)))))
+ (goto-char (point-min))
+ (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
+ boundary))
+ (if micalg
+ (insert (format "\tmicalg=%s; "
+ (downcase
+ (cdr (assq micalg
+ epg-digest-algorithm-alist))))))
+ (insert "protocol=\"application/pgp-signature\"\n")
+ (insert (format "\n--%s\n" boundary))
+ (goto-char (point-max))
+ (insert (format "\n--%s\n" boundary))
+ (insert "Content-Type: application/pgp-signature\n\n")
+ (insert signature)
+ (goto-char (point-max))
+ (insert (format "--%s--\n" boundary))
+ (goto-char (point-max))))
+
+(defun mml2015-epg-encrypt (cont &optional sign)
+ (let ((inhibit-redisplay t)
+ (context (epg-make-context))
+ recipients cipher
+ (boundary (mml-compute-boundary cont)))
+ (if (or mml2015-verbose
+ (null (message-options-get 'message-recipients)))
+ (setq recipients
+ (epa-select-keys context "Select recipients for encryption.
+If no one is selected, symmetric encryption will be performed. "
+ (if (message-options-get 'message-recipients)
+ (split-string
+ (message-options-get 'message-recipients)
+ "[ \f\t\n\r\v,]+"))))
+ (setq recipients
+ (epg-list-keys context
+ (split-string
+ (message-options-get 'message-recipients)
+ "[ \f\t\n\r\v,]+"))))
+ (epg-context-set-armor context t)
+ (epg-context-set-textmode context t)
+ (epg-context-set-passphrase-callback
+ context
+ #'mml2015-epg-passphrase-callback)
+ (condition-case error
+ (setq cipher
+ (epg-encrypt-string context (buffer-string) recipients sign)
+ mml2015-epg-secret-key-id-list nil)
+ (error
+ (while mml2015-epg-secret-key-id-list
+ (password-cache-remove (car mml2015-epg-secret-key-id-list))
+ (setq mml2015-epg-secret-key-id-list
+ (cdr mml2015-epg-secret-key-id-list)))
+ (signal (car error) (cdr error))))
+ (delete-region (point-min) (point-max))
+ (goto-char (point-min))
+ (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
+ boundary))
+ (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
+ (insert (format "--%s\n" boundary))
+ (insert "Content-Type: application/pgp-encrypted\n\n")
+ (insert "Version: 1\n\n")
+ (insert (format "--%s\n" boundary))
+ (insert "Content-Type: application/octet-stream\n\n")
+ (insert cipher)
+ (goto-char (point-max))
+ (insert (format "--%s--\n" boundary))
+ (goto-char (point-max))))
+
;;; General wrapper
(defun mml2015-clean-buffer ()
projects / gnus / commitdiff