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;;; pgg-pgp5.el --- PGP 5.* support for PGG.
;; Copyright (C) 1999-2000, 2002-2017 Free Software Foundation, Inc.
;; Author: Daiki Ueno <ueno@unixuser.org>
;; Created: 1999/11/02
;; Keywords: PGP, OpenPGP
;; Package: pgg
;; Obsolete-since: 24.1
;; 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 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.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(eval-when-compile
(require 'cl))
(require 'pgg)
(defgroup pgg-pgp5 ()
"PGP 5.* interface."
:group 'pgg)
(defcustom pgg-pgp5-pgpe-program "pgpe"
"PGP 5.* `pgpe' executable."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-pgps-program "pgps"
"PGP 5.* `pgps' executable."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-pgpk-program "pgpk"
"PGP 5.* `pgpk' executable."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-pgpv-program "pgpv"
"PGP 5.* `pgpv' executable."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-shell-file-name "/bin/sh"
"File name to load inferior shells from.
Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-shell-command-switch "-c"
"Switch used to have the shell execute its command line argument."
:group 'pgg-pgp5
:type 'string)
(defcustom pgg-pgp5-extra-args nil
"Extra arguments for every PGP 5.* invocation."
:group 'pgg-pgp5
:type '(choice
(const :tag "None" nil)
(string :tag "Arguments")))
(defvar pgg-pgp5-user-id nil
"PGP 5.* ID of your default identity.")
(defun pgg-pgp5-process-region (start end passphrase program args)
(let* ((errors-file-name (pgg-make-temp-file "pgg-errors"))
(args
(append args
pgg-pgp5-extra-args
(list (concat "2>" errors-file-name))))
(shell-file-name pgg-pgp5-shell-file-name)
(shell-command-switch pgg-pgp5-shell-command-switch)
(process-environment process-environment)
(output-buffer pgg-output-buffer)
(errors-buffer pgg-errors-buffer)
(process-connection-type nil)
process status exit-status)
(with-current-buffer (get-buffer-create output-buffer)
(buffer-disable-undo)
(erase-buffer))
(when passphrase
(setenv "PGPPASSFD" "0"))
(unwind-protect
(progn
(let ((coding-system-for-read 'binary)
(coding-system-for-write 'binary))
(setq process
(apply #'funcall
#'start-process-shell-command "*PGP*" output-buffer
program args)))
(set-process-sentinel process #'ignore)
(when passphrase
(process-send-string process (concat passphrase "\n")))
(process-send-region process start end)
(process-send-eof process)
(while (eq 'run (process-status process))
(accept-process-output process 5))
(setq status (process-status process)
exit-status (process-exit-status process))
(delete-process process)
(with-current-buffer output-buffer
(pgg-convert-lbt-region (point-min)(point-max) 'LF)
(if (memq status '(stop signal))
(error "%s exited abnormally: `%s'" program exit-status))
(if (= 127 exit-status)
(error "%s could not be found" program))
(set-buffer (get-buffer-create errors-buffer))
(buffer-disable-undo)
(erase-buffer)
(insert-file-contents errors-file-name)))
(if (and process (eq 'run (process-status process)))
(interrupt-process process))
(condition-case nil
(delete-file errors-file-name)
(file-error nil)))))
(defun pgg-pgp5-lookup-key (string &optional type)
"Search keys associated with STRING."
(let ((args (list "+language=en" "-l" string)))
(with-current-buffer (get-buffer-create pgg-output-buffer)
(buffer-disable-undo)
(erase-buffer)
(apply #'call-process pgg-pgp5-pgpk-program nil t nil args)
(goto-char (point-min))
(when (re-search-forward "^sec" nil t)
(substring
(nth 2 (split-string
(buffer-substring (match-end 0)(progn (end-of-line)(point)))))
2)))))
(defun pgg-pgp5-encrypt-region (start end recipients &optional sign passphrase)
"Encrypt the current region between START and END."
(let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
(passphrase (or passphrase
(when sign
(pgg-read-passphrase
(format "PGP passphrase for %s: "
pgg-pgp5-user-id)
pgg-pgp5-user-id))))
(args
(append
`("+NoBatchInvalidKeys=off" "-fat" "+batchmode=1"
,@(if (or recipients pgg-encrypt-for-me)
(apply #'append
(mapcar (lambda (rcpt)
(list "-r"
(concat "\"" rcpt "\"")))
(append recipients
(if pgg-encrypt-for-me
(list pgg-pgp5-user-id)))))))
(if sign '("-s" "-u" pgg-pgp5-user-id)))))
(pgg-pgp5-process-region start end nil pgg-pgp5-pgpe-program args)
(pgg-process-when-success nil)))
(defun pgg-pgp5-decrypt-region (start end &optional passphrase)
"Decrypt the current region between START and END."
(let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
(passphrase
(or passphrase
(pgg-read-passphrase
(format "PGP passphrase for %s: " pgg-pgp5-user-id)
(pgg-pgp5-lookup-key pgg-pgp5-user-id 'encrypt))))
(args
'("+verbose=1" "+batchmode=1" "+language=us" "-f")))
(pgg-pgp5-process-region start end passphrase pgg-pgp5-pgpv-program args)
(pgg-process-when-success nil)))
(defun pgg-pgp5-sign-region (start end &optional clearsign passphrase)
"Make detached signature from text between START and END."
(let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
(passphrase
(or passphrase
(pgg-read-passphrase
(format "PGP passphrase for %s: " pgg-pgp5-user-id)
(pgg-pgp5-lookup-key pgg-pgp5-user-id 'sign))))
(args
(list (if clearsign "-fat" "-fbat")
"+verbose=1" "+language=us" "+batchmode=1"
"-u" pgg-pgp5-user-id)))
(pgg-pgp5-process-region start end passphrase pgg-pgp5-pgps-program args)
(pgg-process-when-success
(when (re-search-forward "^-+BEGIN PGP SIGNATURE" nil t);XXX
(let ((packet
(cdr (assq 2 (pgg-parse-armor-region
(progn (beginning-of-line 2)
(point))
(point-max))))))
(if pgg-cache-passphrase
(pgg-add-passphrase-to-cache
(cdr (assq 'key-identifier packet))
passphrase)))))))
(defun pgg-pgp5-verify-region (start end &optional signature)
"Verify region between START and END as the detached signature SIGNATURE."
(let ((orig-file (pgg-make-temp-file "pgg"))
(args '("+verbose=1" "+batchmode=1" "+language=us")))
(with-file-modes 448
(let ((coding-system-for-write 'binary)
jka-compr-compression-info-list jam-zcat-filename-list)
(write-region start end orig-file)))
(when (stringp signature)
(copy-file signature (setq signature (concat orig-file ".asc")))
(setq args (append args (list signature))))
(pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpv-program args)
(delete-file orig-file)
(if signature (delete-file signature))
(with-current-buffer pgg-errors-buffer
(goto-char (point-min))
(if (re-search-forward "^Good signature" nil t)
(progn
(set-buffer pgg-output-buffer)
(insert-buffer-substring pgg-errors-buffer)
t)
nil))))
(defun pgg-pgp5-insert-key ()
"Insert public key at point."
(let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
(args
(list "+verbose=1" "+batchmode=1" "+language=us" "-x"
(concat "\"" pgg-pgp5-user-id "\""))))
(pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpk-program args)
(insert-buffer-substring pgg-output-buffer)))
(defun pgg-pgp5-snarf-keys-region (start end)
"Add all public keys in region between START and END to the keyring."
(let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
(key-file (pgg-make-temp-file "pgg"))
(args
(list "+verbose=1" "+batchmode=1" "+language=us" "-a"
key-file)))
(let ((coding-system-for-write 'raw-text-dos))
(write-region start end key-file))
(pgg-pgp5-process-region start end nil pgg-pgp5-pgpk-program args)
(delete-file key-file)
(pgg-process-when-success nil)))
(provide 'pgg-pgp5)
;;; pgg-pgp5.el ends here
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