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|
;;; dispass.el --- Emacs wrapper for DisPass
;; Copyright (C) 2012 Tom Willemsen <tom@ryuslash.org>
;; Author: Tom Willemsen <tom@ryuslash.org>
;; Created: Jun 8, 2012
;; Version: 1.1.1
;; Keywords: processes
;; URL: http://ryuslash.org/projects/dispass.el.html
;; Permission to use, copy, modify, and distribute this software for any
;; purpose with or without fee is hereby granted, provided that the
;; above copyright notice and this permission notice appear in all
;; copies.
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
;;; Commentary:
;; dispass.el is an emacs wrapper around DisPass
;; (http://dispass.babab.nl). For more information see the README.org
;; and NEWS files.
;;; Code:
(defgroup dispass nil
"Customization options for the DisPass wrapper."
:group 'external)
(defcustom dispass-default-length 30
"The default length to use when generating passphrases."
:package-version '(dispass . "1")
:group 'dispass
:type '(integer))
(defcustom dispass-executable "dispass"
"The location of the dispass executable."
:package-version '(dispass . "0.1a7.3")
:group 'dispass
:type '(string)
:risky t)
(defcustom dispass-labels-executable "dispass-label"
"The location of the dispass-label executable."
:package-version '(dispass . "1.1")
:group 'dispass
:type 'string
:risky t)
(defvar dispass-labels-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map tabulated-list-mode-map)
(define-key map "c" 'dispass-create)
(define-key map "a" 'dispass-add-label)
(define-key map "d" 'dispass-remove-label)
map)
"Keymap for `dispass-labels-mode', uses
`tabulated-list-mode-map' as its parent.")
(defun dispass-process-sentinel (proc status)
"Report PROC's status change to STATUS."
(let ((status (substring status 0 -1))
(buffer (process-buffer proc)))
(unless (string-equal status "finished")
(message "dispass %s" status))
(unless (eq (current-buffer) proc)
(kill-buffer buffer))))
(defun dispass-erase-buffer (buffer)
"Completely erase the contents of BUFFER"
(save-current-buffer
(set-buffer buffer)
(buffer-disable-undo buffer)
(kill-buffer buffer)))
(defun dispass-label-at-point ()
"When in `dispass-labels-mode', get the label at `point'."
(let ((labels-mode-p (eq major-mode 'dispass-labels-mode)))
(tabulated-list-get-id)))
(defun dispass-process-filter-for (label)
"Create a function that will process any lines whilst keeping
an eye out for LABEL."
`(lambda (proc string)
"Process STRING coming from PROC."
(cond ((string-match "^\\(Password[^:]*\\|Again\\): ?$" string)
(process-send-string
proc
(concat (read-passwd
(concat (replace-regexp-in-string
"^[ \t\n]+\\|[ \t\n]+$" "" string) " ")
nil) "\n")))
((string-match (concat "^[ \t]*" ,label "[ \t]*\\(.+\\)$")
string)
(let ((buffer (process-buffer proc)))
(with-current-buffer buffer
(insert (match-string 1 string))
(clipboard-kill-ring-save (point-min) (point-max))
(message "Password copied to clipboard.")))))))
(defun dispass-start-process (label create length)
"Start dispass process. When CREATE is non-nil send along the
-c switch to make it ask for a password twice. When LENGTH is
an integer and greater than 0, send along the -l switch with
LENGTH."
(let ((args `("-o" ,label))
proc)
(when create
(setq args (append '("-c") args)))
(when (and (integerp length) (> length 0))
(setq args (append `("-l" ,(number-to-string length)) args)))
(setq proc (apply 'start-process "dispass" "*dispass*"
dispass-executable args))
(set-process-sentinel proc 'dispass-process-sentinel)
(set-process-filter proc (dispass-process-filter-for label))))
(defun dispass-get-labels ()
"Get the list of labels and their information."
(let ((result '()))
(with-temp-buffer
(insert (shell-command-to-string
(concat dispass-labels-executable " -l --script")))
(goto-char (point-min))
(while (re-search-forward
"^\\(\\(?:\\sw\\|\\s_\\)+\\) +\\([0-9]+\\) +\\(\\(?:\\sw\\|\\s_\\)+\\)"
nil t)
(let ((label (match-string 1))
(length (match-string 2))
(algo (match-string 3)))
(add-to-list 'result
(list label
`[(,label
face link
help-echo ,(concat "Generate passphrase for " label)
follow-link t
dispass-label ,label
dispass-length ,length
action dispass-from-button)
,length
,algo])))))
result))
;;;###autoload
(defun dispass-create (label &optional length)
"Create a new password for LABEL."
(interactive "MLabel: \nP")
(let ((length (or length dispass-default-length)))
(dispass-start-process label t length)))
;;;###autoload
(defun dispass (label &optional length)
"Recreate a password previously used."
(interactive (list
(completing-read
"Label: " (mapcar (lambda (elm) (elt elm 0))
(dispass-get-labels)))
current-prefix-arg))
(let ((length (or length dispass-default-length)))
(dispass-start-process label nil length)))
;; Labels management
;;;###autoload
(defun dispass-add-label (label length algo)
"Add LABEL with length LENGTH and algorithm ALGO to DisPass."
(interactive
(list (read-from-minibuffer "Label: ")
(read-from-minibuffer
(format "Length (%d): " dispass-default-length) nil nil t nil
(number-to-string dispass-default-length))
(symbol-name (read-from-minibuffer
"Algorithm (dispass1): " nil nil t nil "dispass1"))))
(shell-command
(format "%s --add %s:%d:%s" dispass-labels-executable label length algo)))
;;;###autoload
(defun dispass-remove-label (label)
"Remove LABEL from DisPass, if LABEL is not given
`tabulated-list-get-id' will be used to get the currently
pointed-at label. If neither LABEL is not found an error is
thrown."
(interactive
(list (or (dispass-label-at-point)
(completing-read
"Label: " (mapcar (lambda (elm) (elt elm 0))
(dispass-get-labels))))))
(shell-command
(format "%s --remove %s" dispass-labels-executable label)))
(defun dispass-from-button (button)
"Call dispass with information from BUTTON."
(dispass (button-get button 'dispass-label)
(button-get button 'dispass-length)))
(defun dispass-labels--refresh ()
"Reload labels from dispass."
(setq tabulated-list-entries nil)
(let ((tmp-list '()))
(setq tabulated-list-entries (dispass-get-labels))))
(define-derived-mode dispass-labels-mode tabulated-list-mode "DisPass"
"Major mode for listing dispass labels.
\\<dispass-labels-mode-map>
\\{dispass-labels-mode-map}"
(setq tabulated-list-format [("Label" 30 t)
("Length" 6 nil)
("Algorithm" 0 t)]
tabulated-list-sort-key '("Label" . nil))
(add-hook 'tabulated-list-revert-hook 'dispass-labels--refresh)
(tabulated-list-init-header))
;;;###autoload
(defun dispass-list-labels ()
"Display a list of labels for dispass."
(interactive)
(let ((buffer (get-buffer-create "*DisPass Labels*")))
(with-current-buffer buffer
(dispass-labels-mode)
(dispass-labels--refresh)
(tabulated-list-print))
(switch-to-buffer-other-window buffer))
nil)
(provide 'dispass)
;;; dispass.el ends here
|
