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emacs-pa.el
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emacs-pa.el
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;;; emacs-pa.el --- A simple password manager -*- lexical-binding: t -*-
;; Copyright (C) 2023 Dean Gao - MIT License
;; Author: Dean Gao <[email protected]>
;; Description: Inline display of remote images in org-mode
;; Homepage: https://github.com/gaoDean/org-imgtog
;; Package-Requires: ((emacs "25.1"))
;; Permission is hereby granted, free of charge, to any person obtaining a copy
;; of this software and associated documentation files (the "Software"), to deal
;; in the Software without restriction, including without limitation the rights
;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;; copies of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:
;;
;; The above copyright notice and this permission notice shall be included in all
;; copies or substantial portions of the Software.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.
;;; Commentary:
;; This is a [[https://github.com/biox/pa][pa]] clone in emacs.
;; Requires [[https://github.com/FiloSottile/age][age]].
;;; Code:
(defun pa--rand-chars (length)
"Generate a string of random chars from /dev/urandom of length LENGTH"
(shell-command-to-string
(concat "my/gen() {LC_ALL=C tr -dc \"$2\" </dev/urandom |
dd ibs=1 obs=1 count=\"$1\" 2>/dev/null};
my/gen"
" "
(format "%d" length)
" "
"_A-Z-a-z-0-9")))
(defun pa--generate-password ()
"Generate a random password"
(pa--rand-chars 50))
(defun pa--read-two-passwords ()
(let ((pass1 (read-passwd "Enter password: "))
(pass2 (read-passwd "Enter password (again): ")))
(if (equal pass1 pass2)
pass1
nil)))
(defun pa--add (site account password)
"Adds a password in the form SITE:ACCOUNT.age with PASSWORD.
Stored in ~/.local/share/pa/passwords to be compatible with biox/pa"
(interactive (list (read-from-minibuffer "Site: ")
(read-from-minibuffer "Account: ")
(if (not (y-or-n-p "Generate a password?"))
(pa--read-two-passwords)
(pa--generate-password))))
(when (and site
(not (string-match-p ":" site))
(not (string-match-p ":" account))
(not (string-match-p "\\s-" site))
(not (string-match-p "\\s-" account)))
(if password
(progn (shell-command (concat "age --encrypt -R ~/.local/share/pa/recipients -o "
"~/.local/share/pa/passwords/"
site
":"
account
".age"
" <<-EOF &&\n"
password))
(message (concat "Saved " site " <" account ">")))
(message "Passwords did not match"))))
(defun pa--exclude-files (files exclude-files)
(seq-filter (lambda (file) (not (member file exclude-files))) files))
(defun pa--list ()
(let* ((directory "~/.local/share/pa/passwords")
(exclude-files '("identities"
"recipients"
"."
".."
".age"
".git"))
(all-files (directory-files directory))
(filtered-files (pa--exclude-files all-files exclude-files))
(renamed-files (mapcar (lambda (filename)
(replace-regexp-in-string (regexp-quote "\.age")
""
filename))
filtered-files))
(alist-files (mapcar (lambda (s)
(let ((key-value (split-string s ":")))
(cons (car key-value) (cadr key-value))))
renamed-files)))
alist-files))
(defun pa--padding-func-1 (str1 str2)
"Complete right-align"
(make-string
(max 0 (- (window-width) (length str1) (length str2)))
?\s))
(defun pa--padding-func-2 (str1 alist)
"Relative left-align"
(make-string
(+ 3 (- (apply #'max (mapcar (lambda (pair) (length (car pair))) alist))
(length str1)))
?\s))
(defun pa--get-account (prompt alist)
"Complete right-align"
(let* ((padded-alist
(mapcar (lambda (pair)
(let* ((candidate (car pair))
(counterpart (cdr pair))
(padding (pa--padding-func-1 candidate counterpart)))
;; (padding (pa--padding-func-2 candidate alist)))
(cons (concat candidate padding counterpart) candidate)))
alist))
(result (string-split (completing-read prompt padded-alist) "\s+")))
result))
(defun pa--show (site account)
"Copies the password to the clipboard"
(interactive (pa--get-account "Account: " (pa--list)))
(when (and site account)
(kill-new (shell-command-to-string (concat "age --decrypt -i ~/.local/share/pa/identities "
"~/.local/share/pa/passwords/"
site
":"
account
".age")))
(message "Copied password to clipboard")))
(defun pa--edit (site account password)
"Edits the password"
(interactive (append (pa--get-account "Account: " (pa--list))
(list (if (not (y-or-n-p "Generate a password?"))
(pa--read-two-passwords)
(pa--generate-password)))))
(if (and site account (yes-or-no-p (concat "Confirm edit: "
site
" <"
account
">?")))
(if password
(pa--add site account password)
(message "Passwords did not match"))
(message "Aborted")))
(defun pa--delete (site account)
"Deletes the account"
(interactive (pa--get-account "Account: " (pa--list)))
(if (and site account (yes-or-no-p (concat "Confirm delete: "
site
" <"
account
">?")))
(delete-file (concat "~/.local/share/pa/passwords/"
site
":"
account
".age"))
(message "Aborted")))
(defun pa--rename (site account new-site new-account)
"Renames SITE and ACCOUNT to NEW-SITE and NEW-ACCOUNT respectively"
(interactive (let* ((site-account (pa--get-account "Account: " (pa--list)))
(old-site (nth 0 site-account))
(old-account (nth 1 site-account))
(new-site
(read-from-minibuffer "New site name: " old-site))
(new-account
(read-from-minibuffer "New account name: " old-account)))
(list old-site old-account new-site new-account)))
(if (and site account new-site new-account (yes-or-no-p (concat "Confirm rename: "
site
" <"
account
"> to "
new-site
" <"
new-account
">?")))
(progn (rename-file (concat "~/.local/share/pa/passwords/" site ":" account ".age")
(concat "~/.local/share/pa/passwords/" new-site ":" new-account ".age"))
(message "Done"))
(message "Aborted")))
(provide 'emacs-pa)
;;; emacs-pa.el ends here