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mew-pgp.el
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;;; mew-pgp.el --- PGP/MIME for Mew
;; Author: Kazu Yamamoto <[email protected]>
;; Created: Aug 17, 1994
;;; Code:
(require 'mew)
;;;
;;; PGP 2.6.x is supported.
;;; PGP 5.x is supported. But very ad-hoc.
;;; GNUPG 1.0.2 or later is supported.
;;; PGP 6.x is supported. But very ad-hoc.
;;;
(defvar mew-pgp-ver nil
"Automatically set 0 if PGP version is 2.
Set 1 if 5. Set 2 if 6. Set 3 if GNUPG.")
(defconst mew-pgp-ver2 0)
(defconst mew-pgp-ver5 1)
(defconst mew-pgp-ver6 2)
(defconst mew-pgp-verg 3)
(defconst mew-pgp-list '("PGPv2" "PGPv5" "PGPv6" "GNUPG"))
(defconst mew-pgp-keys '(pgpv2 pgpv5 pgpv6 gnupg)) ;; use symbols, cases are string
;; mew-prog-pgp is used only for version check
(defvar mew-prog-pgp2 "pgp") ;; "pgp263i", PGP selection
(defvar mew-prog-pgp5 "pgp") ;; PGP selection
(defvar mew-prog-pgp5e "pgpe")
(defvar mew-prog-pgp5s "pgps")
(defvar mew-prog-pgp5v "pgpv")
(defvar mew-prog-pgp5k "pgpk")
(defvar mew-prog-pgp6 "pgp") ;; "pgp651i", PGP selection
(defvar mew-prog-gpg "gpg") ;; PGP selection
(defvar mew-prog-pgpe
`(,mew-prog-pgp2 ,mew-prog-pgp5e ,mew-prog-pgp6 ,mew-prog-gpg))
(defvar mew-prog-pgps
`(,mew-prog-pgp2 ,mew-prog-pgp5s ,mew-prog-pgp6 ,mew-prog-gpg))
(defvar mew-prog-pgpv
`(,mew-prog-pgp2 ,mew-prog-pgp5v ,mew-prog-pgp6 ,mew-prog-gpg))
(defvar mew-prog-pgpd
`(,mew-prog-pgp2 ,mew-prog-pgp5v ,mew-prog-pgp6 ,mew-prog-gpg))
(defvar mew-prog-pgpk
`(,mew-prog-pgp2 ,mew-prog-pgp5k ,mew-prog-pgp6 ,mew-prog-gpg))
(defconst mew-prog-pgpe-arg
'(("-ea" "+language=en" "+batchmode=on" "+armorlines=0")
("-a" "+language=en" "+batchmode=on" "+armorlines=0")
("-ea" "+language=en" "+batchmode=on" "+armorlines=0")
("--encrypt" "--armor" "--batch")))
(defconst mew-prog-pgpd-arg
'(("+language=en" "+batchmode=off")
("+language=en" "+batchmode=off")
("+language=en" "+batchmode=off")
("--decrypt")))
(defvar mew-prog-pgps-arg ;; local binding
'(("-sba" "+language=en" "+batchmode=off")
("-ba" "+language=en" "+batchmode=off")
("-sba" "+language=en" "+batchmode=off")
("--detach-sign" "--armor" "--status-fd" "1")))
(defconst mew-prog-pgpv-arg
'(("+batchmode=on" "+language=en")
("+batchmode=on" "+language=en" "+force=on")
("+batchmode=on" "+language=en")
("--verify" "--batch")))
(defconst mew-prog-old-pgpv-arg
'(("+batchmode=on" "+language=en")
("+batchmode=on" "+language=en" "+force=on")
("+batchmode=on" "+language=en")
("--decrypt" "--batch"))) ;; --verify does not extract original data
(defconst mew-prog-pgp-arg-output '("-o" "-o" "-o" "--output"))
(defconst mew-prog-pgp-arg-input '(nil "-o" nil nil))
(defconst mew-prog-pgp-arg-luserid '("-u" "-u" "-u" "--local-user"))
(defconst mew-prog-pgp-arg-ruserid '(nil "-r" nil "--remote-user"))
(defconst mew-prog-pgpk-add-arg
'(("-ka" "+batchmode=on")
("-a" "+batchmode=on")
("-ka" "+batchmode=on")
("--import" "--batch")))
(defconst mew-prog-pgpk-ext-arg
'(("-kxfa") ("-xa") ("+force" "-kxfa") ("--export" "--armor" "--batch")))
(defconst mew-pgp-msg-signature
'("\n\\(.*\\) signature from user \\(.*\\)\\."
"\n\\(.*\\) signature made"
"\\([a-zA-Z0-9]*\\) signature from user \\(.*\\)\\."
" \\(.*\\) signature from \"\\(.*\\)\""))
(defconst mew-pgp-msg-key-id
'("Key ID \\([a-zA-Z0-9]+\\) not found"
": 0x\\([a-zA-Z0-9]+\\)"
": 0x\\([a-zA-Z0-9]+\\)"
"key ID \\([a-zA-Z0-9]+\\)"))
(defconst mew-pgp-msg-bad-pass
'("No passphrase"
"Cannot unlock private key\\|It can only be decrypted"
"Bad pass phrase"
"bad passphrase"))
(defconst mew-pgp-msg-enter
'("Enter" "Enter" "Enter" "xxx"))
(defconst mew-pgp-msg-overwrite
'("Overwrite (y/N)\\? "
"Overwrite (y/N)\\? "
"Overwrite (y/N)\\? "
"Overwrite (y/N)\\? "))
(defconst mew-pgp-msg-enter-pass
'("Enter pass phrase: "
"Enter pass phrase: "
"Enter pass phrase: "
"Enter passphrase: "))
(defconst mew-pgp-msg-reenter-pass
'("Enter pass phrase: "
"Enter pass phrase: "
"Enter pass phrase: "
"Enter passphrase: "))
(defconst mew-pgp-msg-no-enckey
'("Key matching"
"No encryption keys"
"public key matching"
"public key not found"))
(defconst mew-pgp-msg-no-validkey
'("DUMMY"
"^WARNING:[ -9;-~\n]+belongs? to:"
"^WARNING:[ -9;-~\n]+belongs? to:"
"There is no indication that this key really belongs to the owner"))
(defconst mew-pgp-msg-pubkey-expired
'("xxx"
"xxx"
"xxx"
"encryption failed: unusable public key"))
(defconst mew-pgp-msg-no-vrfkey
'("Key matching" "unknown keyid" "key does not meet" "public key not found"))
(defconst mew-pgp-msg-no-keyring
'("Keyring file" "Keyring file" "NO MESSAGE" "public key not found"))
(defconst mew-pgp-msg-no-seckey-or-secring
'("You do not have the secret key"
"Cannot find a private key"
"Signature error\\|You do not have the secret key"
"failed: secret key not available"))
(defconst mew-pgp-msg-unsupported
'("Unsupported packet format" ;; including algorithms and packets
"Unsupported packet format\\|None of the signatures were understood"
"Unsupported packet format" ;; including algorithms and packets
"xxx"))
(defconst mew-pgp-msg-nocross
'("xxx"
"xxx"
"xxx"
"is not cross-certified"))
(defconst mew-pgp-verify-addr
'(".* \\(signature from user\\) "
"\\( \\)"
".* \\(signature from user\\) "
"gpg: .* \\(from\\|aka\\) "))
;; 2: ASCII armor corrupted
;; 3:
;; 5:
;; 2: ERROR: or Error:
(defconst mew-pgp-msg-no-export-key
'("Key not found" "No keys" "Key not found" "nothing exported"))
(defvar mew-pgp-micalg '("pgp-md5" "pgp-sha1" "pgp-sha1" "pgp-sha1"))
(defvar mew-pgp-hash-alist
'(("1" . "pgp-md5")
("2" . "pgp-sha1")
("3" . "pgp-ripemd160")
("5" . "pgp-md2")
("6" . "pgp-tiger192")
("7" . "pgp-haval-5-160")
("8" . "pgp-sha256")
("9" . "pgp-sha384")
("10" . "pgp-sha512")))
;;
;;
(defvar mew-pgp-string nil)
(defvar mew-pgp-running nil)
(defvar mew-pgp-failure nil)
(defvar mew-pgp-decrypt-msg nil)
(defvar mew-pgp-sign-msg nil)
(defconst mew-pgp-encryption-begin "-----BEGIN PGP MESSAGE-----")
(defconst mew-pgp-signature-begin "-----BEGIN PGP SIGNED MESSAGE-----")
(defconst mew-pgp-key-begin "-----BEGIN PGP PUBLIC KEY BLOCK-----")
(defconst mew-pgp-key-end "-----END PGP PUBLIC KEY BLOCK-----")
(defconst mew-pgp-err-pass 'mew-err-pass)
(defconst mew-pgp-err-pubring 'mew-err-pubring)
(defconst mew-pgp-err-secring 'mew-err-secring)
(defconst mew-pgp-err-pubkey 'mew-err-pubkey)
(defconst mew-pgp-err-seckey 'mew-err-seckey)
(defconst mew-pgp-err-seckey-or-secring 'mew-err-seckey-or-secring)
(defconst mew-pgp-err-other 'mew-err-other)
(defvar mew-pgp-result-pass "Pass phrase is wrong")
(defvar mew-pgp-result-pubring "No public keyring")
(defvar mew-pgp-result-secring "No secret keyring")
(defvar mew-pgp-result-pubkey "No his/her public key")
(defvar mew-pgp-result-expired "His/her public key is expired or not signed by yourself")
(defvar mew-pgp-result-invalid
"His/her public key is invalid. Sign the key by yourself, first")
(defvar mew-pgp-result-seckey "No your secret key")
(defvar mew-pgp-result-seckey-or-secring
"No secret keyring or no your secret key")
(defvar mew-pgp-result-other "PGP failed for some reasons")
(defvar mew-pgp-result-sec-succ "PGP decrypted")
(defvar mew-pgp-result-dec-fail "PGP NOT decrypted for some reasons")
(defvar mew-pgp-result-unsup "PGP unsupported signature")
(defvar mew-pgp-result-nocross "His/her Public key is not cross-certified")
(defvar mew-pgp-prompt-enter-pass "Enter pass phrase (%s): ")
(defvar mew-pgp-prompt-reenter-pass "Re-enter pass phrase (%s): ")
(defun mew-pgp-get (list-or-vec)
(elt list-or-vec mew-pgp-ver))
(defun mew-pgp-set (vec val)
(aset vec mew-pgp-ver val))
(defun mew-pgp-debug (label string)
(when (mew-debug 'pgp)
(with-current-buffer (get-buffer-create mew-buffer-debug)
(goto-char (point-max))
(insert (format "\n<%s>\n%s\n" label string)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP version check
;;;
(defun mew-pgp-setup ()
(cond
((mew-which-exec mew-prog-pgp)
(with-temp-buffer
(mew-call-process-lang mew-prog-pgp nil t nil)
(goto-char (point-min))
(if (search-forward "PGP is now invoked" nil t)
(setq mew-pgp-ver mew-pgp-ver5)
(goto-char (point-min))
(if (search-forward "Pretty Good Privacy(tm) 2" nil t)
(setq mew-pgp-ver mew-pgp-ver2)
(goto-char (point-min))
(if (search-forward "gpg" nil t)
(setq mew-pgp-ver mew-pgp-verg)
(goto-char (point-min))
(if (search-forward "Pretty Good Privacy(tm) Version 6" nil t)
(setq mew-pgp-ver mew-pgp-ver6)
(setq mew-pgp-ver nil)))))))
(t (setq mew-pgp-ver nil))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP selection
;;;
(defun mew-pgp-select ()
"Select PGP version and set up environment for selected PGP."
(interactive)
(setq mew-prog-pgp
(completing-read
"PGP name: "
(mapcar 'list (list mew-prog-pgp2 mew-prog-pgp5 mew-prog-gpg))
nil t))
(mew-pgp-setup))
;; xxx how about multiple users on local machine?
(defun mew-pgp-passtag ()
(mew-pgp-get mew-pgp-list))
(defun mew-pgp-passphrase (&optional again)
(let ((prompt (if again
mew-pgp-prompt-reenter-pass
mew-pgp-prompt-enter-pass))
(msg (mew-pgp-passtag)))
(setq prompt (format prompt msg))
(mew-input-passwd prompt msg)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP verifying
;;;
(defun mew-pgp-verify-check ()
(let (ret keyid)
(goto-char (point-min))
(if (not (re-search-forward (mew-pgp-get mew-pgp-msg-signature) nil t))
;; this is verification, so the error is about public key
(progn
(goto-char (point-min))
(if (search-forward (mew-pgp-get mew-pgp-msg-no-vrfkey) nil t)
(progn
(goto-char (point-min))
(if (not (re-search-forward (mew-pgp-get mew-pgp-msg-key-id) nil t))
(setq keyid "not found")
(setq keyid (format "0x%s"(mew-match-string 1))))
(setq ret (concat mew-pgp-result-pubkey ": ID = " keyid)))
(if (search-forward (mew-pgp-get mew-pgp-msg-no-keyring) nil t)
(setq ret mew-pgp-result-pubring)
(if (re-search-forward (mew-pgp-get mew-pgp-msg-unsupported) nil t)
(setq ret mew-pgp-result-unsup)
(if (re-search-forward (mew-pgp-get mew-pgp-msg-nocross) nil t)
(setq ret mew-pgp-result-nocross)
;; this line must be nil since this function is used
;; by the decryption function, too, for signed-then-encrypted
;; messages. We cannot tell whether or not signatures exist
;; from the outside of the cipher.
)))))
;; Signature result is found.
(setq ret (concat (mew-match-string 1) " PGP sign "))
(goto-char (point-max))
(if (and mew-inherit-decode-signer
(re-search-backward (concat (mew-pgp-get mew-pgp-verify-addr) ".*" mew-inherit-decode-signer) nil t))
(progn
(beginning-of-line)
(looking-at (concat (mew-pgp-get mew-pgp-verify-addr) "\\(.*\\)"))
(setq ret (concat ret (mew-match-string 2))))
(goto-char (point-max))
(re-search-backward (concat (mew-pgp-get mew-pgp-verify-addr) "\\(.*\\)") nil t)
(setq ret (concat ret (mew-match-string 2))))
;; xxx
(goto-char (point-min))
(if (re-search-forward "not certified with \\(enough\\|sufficiently\\)" nil t)
(setq ret (concat ret " MARGINAL"))
(goto-char (point-min))
(if (search-forward "not trusted" nil t)
(setq ret (concat ret " UNTRUSTED"))
(goto-char (point-min))
(if (search-forward "not certified with a" nil t)
;; PGP uses "unknown" for validity internally, but
;; prints "undefined" instead of "unknown".
(setq ret (concat ret " UNDEFINED"))
(goto-char (point-min))
(if (search-forward "expired" nil t)
(setq ret (concat ret " EXPIRED"))
(setq ret (concat ret " COMPLETE")))))))
ret))
(defun mew-pgp-verify (file1 file2)
(message "PGP verifying...")
(let ((ioption (mew-pgp-get mew-prog-pgp-arg-input)) ;; detached signature
(voptions (mew-pgp-get mew-prog-pgpv-arg))
(pgpv (mew-pgp-get mew-prog-pgpv))
files ret)
(with-temp-buffer
(if ioption
(setq files (list ioption file1 file2))
(setq files (list file2 file1)))
(apply 'mew-call-process-lang pgpv nil t nil (append voptions files))
(setq ret (mew-pgp-verify-check)))
(message "PGP verifying...done")
ret))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP encrypting
;;;
(defun mew-pgp-encrypt-check ()
(let (ret) ;; this should be nil
(goto-char (point-min))
(if (re-search-forward (mew-pgp-get mew-pgp-msg-no-validkey) nil t)
(setq ret mew-pgp-result-invalid)
(goto-char (point-min))
(if (search-forward (mew-pgp-get mew-pgp-msg-no-enckey) nil t)
(setq ret mew-pgp-result-pubkey)
(goto-char (point-min))
(if (search-forward (mew-pgp-get mew-pgp-msg-no-keyring) nil t)
(setq ret mew-pgp-result-pubring)
(goto-char (point-min))
(if (search-forward (mew-pgp-get mew-pgp-msg-pubkey-expired) nil t)
(setq ret mew-pgp-result-expired)))))
ret))
(defun mew-pgp-encrypt (file1 decrypters)
(message "PGP encrypting...")
(let ((roption (mew-pgp-get mew-prog-pgp-arg-ruserid))
(ooption (mew-pgp-get mew-prog-pgp-arg-output))
(eoptions (mew-pgp-get mew-prog-pgpe-arg))
(pgpe (mew-pgp-get mew-prog-pgpe))
(file2 (mew-make-temp-name))
check file3 decs args) ;; not unique if file3 is made here
(with-temp-buffer
(insert "Version: 1\n")
(write-region (point-min) (point-max) file2 nil 'no-msg))
(setq file3 (concat (mew-make-temp-name) mew-pgp-ascii-suffix))
(if (and mew-encrypt-to-myself
(not (member mew-inherit-encode-pgp-signer decrypters)))
(setq decrypters (cons mew-inherit-encode-pgp-signer decrypters)))
(setq decrypters
(mapcar (lambda (x)
(if (string-match "^[^<].*@" x) (concat "<" x ">") x))
decrypters))
(if (not roption)
(setq args (append (list ooption file3 file1) eoptions decrypters))
(mapc
(lambda (x) (setq decs (cons roption (cons x decs))))
decrypters)
(setq args (append eoptions decs (list ooption file3 file1))))
(with-temp-buffer
(apply 'mew-call-process-lang pgpe nil t nil args)
(setq check (mew-pgp-encrypt-check)))
(message "PGP encrypting...done")
(list file2 mew-7bit file3 mew-7bit check))) ;; both ctes are 7bit
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP decrypting
;;;
(defun mew-pgp-decrypt (file1 file2)
;; file1 is a key file. just ignore.
;; file2 is an encrypted file with PGP.
(message "PGP decrypting...")
(setq mew-pgp-running 'decrypting)
(setq mew-pgp-string nil)
(setq mew-pgp-decrypt-msg nil)
(setq mew-pgp-failure nil)
(let ((process-connection-type mew-connection-type2)
(ooption (mew-pgp-get mew-prog-pgp-arg-output))
(doptions (mew-pgp-get mew-prog-pgpd-arg))
(pgpd (mew-pgp-get mew-prog-pgpd))
file3 process verify)
(setq file3 (mew-make-temp-name))
(setq process
(apply 'mew-start-process-lang
"PGP decrypt"
(current-buffer)
pgpd
(append doptions (list ooption file3 file2))))
(mew-set-process-cs process mew-cs-autoconv mew-cs-dummy)
(set-process-filter process 'mew-pgp-process-filter1)
(set-process-sentinel process 'mew-pgp-process-sentinel)
(mew-rendezvous mew-pgp-running)
(message "PGP decrypting...done")
(if (file-exists-p file3)
(progn
(with-temp-buffer
(insert mew-pgp-string)
(setq verify (mew-pgp-verify-check)))
(when verify
(setq mew-pgp-decrypt-msg (concat mew-pgp-decrypt-msg "\n\t" verify))))
;; unpredictable error
(mew-passwd-set-passwd (mew-pgp-passtag) nil)
(if (string= mew-pgp-decrypt-msg mew-pgp-result-sec-succ)
(setq mew-pgp-decrypt-msg mew-pgp-result-dec-fail)))
(list file3 mew-pgp-decrypt-msg)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP signing
;;;
(defun mew-pgp-canonicalize ()
(save-excursion
(goto-char (point-min))
(while (re-search-forward "[ \t]+$" nil t)
(replace-match "" nil t)
(forward-line))))
(defun mew-pgp-get-micalg ()
(let ((micalg (mew-pgp-get mew-pgp-micalg)) alg)
(if (/= mew-pgp-ver mew-pgp-verg)
micalg
(with-temp-buffer
(insert mew-pgp-string)
(goto-char (point-min))
(if (re-search-forward "SIG_CREATED [A-Z] [0-9]+ \\([0-9]+\\)" nil t)
(setq alg (cdr (assoc (mew-match-string 1) mew-pgp-hash-alist)))))
(or alg micalg))))
(defun mew-pgp-sign (file1)
(message "PGP signing...")
(setq mew-pgp-running 'signing)
(setq mew-pgp-string nil)
(setq mew-pgp-sign-msg nil)
(setq mew-pgp-failure nil)
(let ((process-connection-type mew-connection-type2)
(loption (mew-pgp-get mew-prog-pgp-arg-luserid))
(ooption (mew-pgp-get mew-prog-pgp-arg-output))
(soptions (mew-pgp-get mew-prog-pgps-arg))
(pgps (mew-pgp-get mew-prog-pgps))
file2 process)
(setq file2 (concat (mew-make-temp-name) mew-pgp-ascii-suffix))
;; not perfectly unique but OK
(setq process
(apply 'mew-start-process-lang
"PGP sign"
(current-buffer) ;; xxx nil?
pgps
(append soptions (list loption mew-inherit-encode-pgp-signer ooption file2 file1))))
(mew-set-process-cs process mew-cs-autoconv mew-cs-dummy)
(set-process-filter process 'mew-pgp-process-filter1)
(set-process-sentinel process 'mew-pgp-process-sentinel)
(mew-rendezvous mew-pgp-running)
(message "PGP signing...done")
(unless (file-exists-p file2) ;; for unpredictable error
(mew-passwd-set-passwd (mew-pgp-passtag) nil))
(list file2 nil (mew-pgp-get-micalg) mew-pgp-sign-msg))) ;; return
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; PGP process functions
;;;
(defun mew-pgp-process-sentinel (process event)
(save-excursion
(let ((decrypted mew-pgp-result-sec-succ)
(msg ""))
(if (not mew-pgp-failure)
(cond
((eq mew-pgp-running 'decrypting)
(setq mew-pgp-decrypt-msg decrypted))
((eq mew-pgp-running 'signing)
(setq mew-pgp-sign-msg nil)))
(cond
;; sign or decrypt
((eq mew-pgp-failure mew-pgp-err-pass)
(setq msg mew-pgp-result-pass))
;; decrypt-then-verify
((eq mew-pgp-failure mew-pgp-err-pubring)
(setq msg decrypted))
;; decrypt-then-verify
((eq mew-pgp-failure mew-pgp-err-pubkey)
(setq msg decrypted))
;; sign
((eq mew-pgp-failure mew-pgp-err-secring)
(setq msg mew-pgp-result-secring))
;; sign
((eq mew-pgp-failure mew-pgp-err-seckey)
(setq msg mew-pgp-result-seckey))
;; decrypt
((eq mew-pgp-failure mew-pgp-err-seckey-or-secring)
(setq msg mew-pgp-result-seckey-or-secring))
;; other
(t ;; mew-pgp-err-other or nil
(setq msg mew-pgp-result-other)))
(cond
((eq mew-pgp-running 'decrypting)
(setq mew-pgp-decrypt-msg msg))
((eq mew-pgp-running 'signing)
(setq mew-pgp-sign-msg msg))))
(setq mew-pgp-running nil))))
(defun mew-pgp-process-filter1 (process string)
(save-excursion
;; sign or decrypt, not verify
(mew-pgp-debug "PGP filter1" string)
(setq mew-pgp-string (concat mew-pgp-string string))
(cond
;; no secret key or no secring for decrypt
((string-match (mew-pgp-get mew-pgp-msg-no-seckey-or-secring) string)
(setq mew-pgp-failure mew-pgp-err-seckey-or-secring)
(set-process-filter process 'mew-pgp-process-filter3))
;; no secring for sign
((string-match (mew-pgp-get mew-pgp-msg-no-keyring) string)
(setq mew-pgp-failure mew-pgp-err-secring)
;; Enter secret key filename:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3))
;; no secret key for sign
((string-match (mew-pgp-get mew-pgp-msg-no-enckey) string)
(setq mew-pgp-failure mew-pgp-err-seckey)
;; Enter secret key filename:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3))
;; pass phrase for sign or decrypt
((string-match (mew-pgp-get mew-pgp-msg-enter-pass) string)
(process-send-string process (format "%s\n" (mew-pgp-passphrase)))
(set-process-filter process 'mew-pgp-process-filter2))
;; overwrite a previous data with a new data. (multiple data is unsupported)
((string-match (mew-pgp-get mew-pgp-msg-overwrite) string)
(process-send-string process "y\n")
(set-process-filter process 'mew-pgp-process-filter1))
;; just in case
((string-match (mew-pgp-get mew-pgp-msg-enter) string)
(setq mew-pgp-failure mew-pgp-err-other)
;; Enter PSWD:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3)))))
(defun mew-pgp-process-filter2 (process string)
(save-excursion
(mew-pgp-debug "PGP filter2" string)
(setq mew-pgp-string (concat mew-pgp-string string))
(cond
;; re-enter pass phrase
((string-match (mew-pgp-get mew-pgp-msg-reenter-pass) string)
(setq mew-pgp-string nil)
(mew-passwd-set-passwd (mew-pgp-passtag) nil) ;; cancel anyway
(process-send-string process (format "%s\n" (mew-pgp-passphrase 'again)))
(set-process-filter process 'mew-pgp-process-filter2))
;; pass phrases were wrong three times
((string-match (mew-pgp-get mew-pgp-msg-bad-pass) string)
(setq mew-pgp-failure mew-pgp-err-pass)
(mew-passwd-set-passwd (mew-pgp-passtag) nil) ;; cancel anyway
(set-process-filter process 'mew-pgp-process-filter3))
;; no pubring for verify
((string-match (mew-pgp-get mew-pgp-msg-no-keyring) string)
(setq mew-pgp-failure mew-pgp-err-pubring)
;; Enter public key filename:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3))
;; no public key for verify
((string-match (mew-pgp-get mew-pgp-msg-no-vrfkey) string)
(setq mew-pgp-failure mew-pgp-err-pubkey)
;; Enter public key filename:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3))
;; after decrypted secret key, symmetric key is not unknown...
;; gpg: unknown cipher algorithm
;; no secret key or no secring for decrypt
((string-match (mew-pgp-get mew-pgp-msg-no-seckey-or-secring) string)
(setq mew-pgp-failure mew-pgp-err-seckey-or-secring)
(set-process-filter process 'mew-pgp-process-filter3))
;; overwrite a previous data with a new data. (multiple data is unsupported)
((string-match (mew-pgp-get mew-pgp-msg-overwrite) string)
(process-send-string process "y\n")
(set-process-filter process 'mew-pgp-process-filter2))
;; just in case
((string-match (mew-pgp-get mew-pgp-msg-enter) string)
(setq mew-pgp-failure mew-pgp-err-other)
;; Enter PSWD:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3)))))
(defun mew-pgp-process-filter3 (process string)
(save-excursion
(mew-pgp-debug "PGP filter3" string)
;; ending or error
(setq mew-pgp-string (concat mew-pgp-string string))
;; string may contain old "Enter"
(cond
;; just in case
((string-match (mew-pgp-get mew-pgp-msg-enter) string)
;; (setq mew-pgp-failure mew-pgp-err-other) ;; this is wrong
;; Enter PSWD:
(process-send-string process "\n")
(set-process-filter process 'mew-pgp-process-filter3)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; shortcut methods
;;;
(defun mew-pgp-sign-message (&optional arg)
"Sign the entire draft with PGP. Input your passphrase."
(interactive "P")
(mew-pgp-encode-message 'pgp-signature arg))
(defun mew-pgp-encrypt-message ()
"Encrypt the entire draft with PGP."
(interactive)
(mew-pgp-encode-message 'pgp-encryption))
(defun mew-pgp-sign-encrypt-message (&optional arg)
"Sign then encrypt the entire draft with PGP. Input your passphrase."
(interactive "P")
(mew-pgp-encode-message 'pgp-signature-encryption))
(defun mew-pgp-encrypt-sign-message (&optional arg)
"Encrypt then sign the entire draft with PGP. Input your passphrase."
(interactive "P")
(mew-pgp-encode-message 'pgp-encryption-signature))
(defun mew-pgp-encode-message (type &optional ask-signer)
(if (null mew-pgp-ver)
(message "%s does not exist" mew-prog-pgp)
(let ((func 'mew-draft-make-message))
(if (mew-use-old-pgp (mew-tinfo-get-case))
(setq func 'mew-old-pgp-encode))
(if (and ask-signer (string-match "signature" (symbol-name type)))
(funcall func type (car (mew-input-address "Who's key?: ")))
(funcall func type)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; old PGP encoding
;;;
(defconst mew-prog-old-pgps-arg
'(("-sat" "+clearsig=on" "+language=en" "+batchmode=off")
("-at" "+clearsig=on" "+language=en" "+batchmode=off")
("-sat" "+clearsig=on" "+language=en" "+batchmode=off")
("--clearsign" "--armor" "--textmode")))
(defconst mew-prog-old-pgpse-arg
'(("-seat" "+language=en" "+batchmode=off")
("-eat" "+language=en" "+batchmode=off")
("-seat" "+language=en" "+batchmode=off")
("--sign" "--encrypt" "--armor" "--textmode")))
(defconst mew-prog-old-pgpe-arg
'(("-eat" "+language=en" "+batchmode=on" "+armorlines=0")
("-at" "+language=en" "+batchmode=on" "+armorlines=0")
("-eat" "+language=en" "+batchmode=on" "+armorlines=0")
("--encrypt" "--armor" "--textmode" "--batch")))
(defun mew-old-pgp-encode (type &optional signer)
(let (mew-inherit-encode-pgp-signer doit syntax ctl ct charset cs)
(if (mew-attach-p)
(if (mew-encode-syntax-have-one-part)
(progn
(setq syntax (mew-syntax-get-part mew-encode-syntax))
(setq ctl (mew-syntax-get-ct syntax))
(setq ct (mew-syntax-get-value ctl 'cap))
(if (string= ct mew-ct-txt)
(progn
(setq charset (mew-syntax-get-param ctl "charset"))
(setq cs (mew-charset-to-cs charset))
(setq doit t)
(mew-attach-clear))
(message "Old PGP cannot be used for non-text")))
(message "Old PGP cannot be used if multipart exists"))
(setq doit t))
(when doit
(setq mew-inherit-encode-pgp-signer (or signer
(mew-pgp-signer (mew-tinfo-get-case))
(mew-get-my-address)))
(cond
((eq type 'pgp-signature)
(mew-old-pgp-sign cs syntax))
((eq type 'pgp-encryption)
(mew-old-pgp-encrypt cs))
((eq type 'pgp-signature-encryption)
(mew-pgp-old-sign-encrypt cs))
(t
(message "Not supported"))))))
(defun mew-old-pgp-sign (cs &optional syntax)
(let ((file1 (mew-make-temp-name))
(mew-prog-pgps-arg mew-prog-old-pgps-arg)
file2 fmc errmsg charset)
(goto-char (mew-header-end))
(forward-line)
(unless cs
(setq charset (mew-charset-guess-region (point) (point-max)))
(setq cs (mew-charset-to-cs charset)))
(mew-frwlet mew-cs-dummy cs
(write-region (point) (point-max) file1 nil 'no-msg))
(condition-case nil
(setq fmc (mew-pgp-sign file1))
(error
(mew-delete-file file1)
(mew-encode-error
(format "unknown error for %s. Check %s, anyway"
mew-ct-mls mew-temp-dir))))
(mew-set '(file2 nil nil errmsg) fmc)
(if errmsg
(progn
(mew-delete-file file1)
(mew-delete-file file2)
(error errmsg))
(delete-region (point) (point-max))
(mew-frwlet cs mew-cs-dummy
(insert-file-contents file2))
(mew-delete-file file1)
(mew-delete-file file2)
(setq mew-encode-syntax syntax)
(mew-draft-make-message))))
(defun mew-old-pgp-encrypt (cs)
(let ((file1 (mew-make-temp-name))
(mew-prog-pgps-arg mew-prog-old-pgps-arg)
(decrypters (mew-header-parse-address-list mew-destination:-list))
file2 file3 fc errmsg charset)
(goto-char (mew-header-end))
(forward-line)
(unless cs
(setq charset (mew-charset-guess-region (point) (point-max)))
(setq cs (mew-charset-to-cs charset)))
(mew-frwlet mew-cs-dummy cs
(write-region (point) (point-max) file1 nil 'no-msg))
(condition-case nil
(setq fc (mew-pgp-encrypt file1 decrypters))
(error
(mew-delete-file file1)
(mew-encode-error
(format "unknown error for %s. Check %s, anyway"
mew-ct-mle mew-temp-dir))))
(mew-set '(file2 nil file3 nil errmsg) fc)
(if errmsg
(progn
(mew-delete-file file1)
(mew-delete-file file2)
(mew-delete-file file3)
(error errmsg))
;; Create multipart content-header
(delete-region (point) (point-max))
(mew-frwlet cs mew-cs-dummy
(insert-file-contents file3))
(mew-delete-file file1)
(mew-delete-file file2)
(mew-delete-file file3)
(setq mew-encode-syntax nil)
(mew-draft-make-message))))
(defun mew-pgp-old-sign-encrypt (cs)
(message "PGP signing then encrypting...")
(let ((decrypters (mew-header-parse-address-list mew-destination:-list))
(roption (mew-pgp-get mew-prog-pgp-arg-ruserid))
(loption (mew-pgp-get mew-prog-pgp-arg-luserid))
(ooption (mew-pgp-get mew-prog-pgp-arg-output))
(eoptions (mew-pgp-get mew-prog-old-pgpse-arg)) ;; xxx
(pgpe (mew-pgp-get mew-prog-pgpe)) ;; xxx
(file1 (mew-make-temp-name))
file2 check decs args process charset)
(goto-char (mew-header-end))
(forward-line)
(unless cs
(setq charset (mew-charset-guess-region (point) (point-max)))
(setq cs (mew-charset-to-cs charset)))
(mew-frwlet mew-cs-dummy cs
(write-region (point) (point-max) file1 nil 'no-msg))
(if (and mew-encrypt-to-myself
(not (member mew-inherit-encode-pgp-signer decrypters)))
(setq decrypters (cons mew-inherit-encode-pgp-signer decrypters)))
(setq decrypters
(mapcar (lambda (x)
(if (string-match "^[^<].*@" x) (concat "<" x ">") x))
decrypters))
(setq file2 (mew-make-temp-name))
(setq args (list loption mew-inherit-encode-pgp-signer ooption file2 file1))
(if (not roption)
(setq args (append args eoptions decrypters))
(dolist (decrypter decrypters)
;; nreverse later, take care.
(setq decs (cons decrypter (cons roption decs))))
(setq decrypters (nreverse decs))
(setq args (append eoptions decrypters args)))
(setq mew-pgp-running 'signing)
(setq mew-pgp-string nil)
(setq mew-pgp-sign-msg nil)
(setq mew-pgp-failure nil)
(with-temp-buffer
(setq process (apply 'mew-start-process-lang
"PGP sign"
(current-buffer)
pgpe args))
(mew-set-process-cs process mew-cs-autoconv mew-cs-dummy)
(set-process-filter process 'mew-pgp-process-filter1)
(set-process-sentinel process 'mew-pgp-process-sentinel)
(mew-rendezvous mew-pgp-running)
(message "PGP signing then encrypting...done")
(setq check (mew-pgp-encrypt-check)))
(unless (file-exists-p file2) ;; for unpredictable error
(mew-passwd-set-passwd (mew-pgp-passtag) nil))
(if (or mew-pgp-sign-msg check)
(progn
(mew-delete-file file1)
(mew-delete-file file2)
(error (or mew-pgp-sign-msg check)))
(delete-region (point) (point-max))
(mew-frwlet cs mew-cs-dummy
(insert-file-contents file2))
(mew-delete-file file1)
(mew-delete-file file2)
(setq mew-encode-syntax nil)
(mew-draft-make-message))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; old PGP decoding
;;;
(defun mew-old-pgp-check ()
(goto-char (point-min))
(if (re-search-forward (concat "^" mew-pgp-encryption-begin) nil t)
;; this may be 'pgp-signature, but we hope clearsig is used...
'pgp-encryption
(goto-char (point-min))
(if (re-search-forward (concat "^" mew-pgp-signature-begin) nil t)
'pgp-signature
nil)))
(defun mew-old-pgp-verify (file)
(message "PGP verifying...")
(let ((voptions (mew-pgp-get mew-prog-old-pgpv-arg))
(ooption (mew-pgp-get mew-prog-pgp-arg-output))
(pgpv (mew-pgp-get mew-prog-pgpv))
(file1 (mew-make-temp-name))
verify)
(with-temp-buffer
(apply 'mew-call-process-lang
pgpv nil t nil (append voptions (list ooption file1 file)))
(setq verify (mew-pgp-verify-check)))
(message "PGP verifying...done")
(list file1 verify)))
(defun mew-summary-decode-old-pgp ()
"Decrypting/verifying old-fashioned PGP messages."
(interactive)
(if (null mew-pgp-ver)
(message "%s does not exist" mew-prog-pgp)
(mew-summary-msg
(let ((fld (mew-summary-folder-name))
(msg (mew-summary-message-number2))
type)
(with-current-buffer (mew-buffer-message)
;; We need MIME-decoded buffer to check PGP boundaries.
(setq type (mew-old-pgp-check))
(if type
(mew-old-pgp-decode fld msg type)
(message "No PGP data found")))))))
(defun mew-old-pgp-decode (fld msg type)
;; in Message buffer
(let* ((cache (mew-cache-hit fld msg 'must-hit))
(syntax (mew-cache-decode-syntax cache))
(file (mew-expand-msg fld msg))
mew-inherit-decode-signer
file1 file2 result xmew win start cte)
(with-temp-buffer
(mew-frwlet mew-cs-text-for-read mew-cs-text-for-write
(mew-insert-file-contents file)
(re-search-forward mew-eoh nil t)
(forward-line)
(delete-region (point-min) (point))
(when (eq type 'pgp-signature)
(setq cte (mew-syntax-get-cte (mew-syntax-get-part syntax)))
(mew-decode-mime-body nil mew-ct-txt cte))
(setq file1 (mew-make-temp-name))
(write-region (point-min) (point-max) file1 nil 'no-msg)))
(mew-elet
(widen)
(setq win (get-buffer-window (current-buffer)))
(setq start (window-start win))
(setq mew-inherit-decode-signer
(mew-addrstr-parse-address
(mew-header-get-value mew-from:)))
(goto-char (mew-header-end))
(forward-line)
(delete-region (point) (point-max))
(cond
((eq type 'pgp-encryption)
(setq result (mew-pgp-decrypt 'dummy file1)))
((eq type 'pgp-signature)
(setq result (mew-old-pgp-verify file1))))
(mew-set '(file2 xmew) result)
(unless xmew (setq xmew "CRC error")) ;; xxx
(mew-xinfo-set-pri-result
(concat mew-x-mew: " <body> " xmew "\n"))
(save-excursion
(mew-header-delete-lines (list mew-x-mew:))
(goto-char (mew-header-end))
(mew-decode-syntax-insert-privacy))
(when (and file1 (file-exists-p file1))
(mew-delete-file file1))
(when (and file2 (file-exists-p file2))
(mew-frwlet mew-cs-text-for-read mew-cs-dummy
(mew-insert-file-contents file2))
(mew-delete-file file2))
(mew-cs-decode-region
(point) (point-max)
;; This is valid for PGP signature only.
;; Since cipher text is encoded with Radix 64, charset should
;; be "US-ASCII". I don't know this code is valid for
;; cipher text in the case that a wrong charset is specified.
(or (mew-charset-to-cs