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1274 lines
42 KiB
EmacsLisp
1274 lines
42 KiB
EmacsLisp
;;; epa.el --- the EasyPG Assistant -*- lexical-binding: t -*-
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;; Copyright (C) 2006-2021 Free Software Foundation, Inc.
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;; Author: Daiki Ueno <ueno@unixuser.org>
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;; Keywords: PGP, GnuPG
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Code:
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;;; Dependencies
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(require 'epg)
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(eval-when-compile (require 'subr-x))
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(require 'derived)
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;;; Options
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(defgroup epa nil
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"The EasyPG Assistant"
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:version "23.1"
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:link '(custom-manual "(epa) Top")
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:group 'epg)
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(defcustom epa-replace-original-text 'ask
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"Whether the original text shall be replaced by the decrypted.
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If t, replace the original text without any confirmation.
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If nil, don't replace the original text and show the result in a new buffer.
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If neither t nor nil, ask user for confirmation."
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:version "26.1"
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:type '(choice (const :tag "Never" nil)
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(const :tag "Ask the user" ask)
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(const :tag "Always" t))
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:group 'epa)
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(defcustom epa-popup-info-window t
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"If non-nil, display status information from epa commands in another window."
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:type 'boolean
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:group 'epa)
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(defcustom epa-info-window-height 5
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"Number of lines used to display status information."
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:type 'integer
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:group 'epa)
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(defcustom epa-mail-aliases nil
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"Alist of aliases of email addresses that stand for encryption keys.
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Each element is a list of email addresses (ALIAS EXPANSIONS...).
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When one of the recipients of a message being encrypted is ALIAS,
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instead of encrypting it for ALIAS, encrypt it for EXPANSIONS...
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If EXPANSIONS is empty, ignore ALIAS as regards encryption.
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This is a handy way to avoid warnings about addresses that you don't
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have any key for.
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The command `epa-mail-encrypt' uses this."
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:type '(repeat (cons (string :tag "Alias") (repeat (string :tag "Expansion"))))
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:group 'epa
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:version "24.4")
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;;; Faces
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(defgroup epa-faces nil
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"Faces for epa-mode."
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:version "23.1"
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:group 'epa)
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(defface epa-validity-high
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'((default :weight bold)
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(((class color) (background dark)) :foreground "PaleTurquoise"))
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"Face for high validity EPA information."
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:group 'epa-faces)
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(defface epa-validity-medium
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'((default :slant italic)
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(((class color) (background dark)) :foreground "PaleTurquoise"))
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"Face for medium validity EPA information."
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:group 'epa-faces)
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(defface epa-validity-low
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'((t :slant italic))
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"Face used for displaying the low validity."
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:group 'epa-faces)
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(defface epa-validity-disabled
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'((t :slant italic :inverse-video t))
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"Face used for displaying the disabled validity."
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:group 'epa-faces)
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(defface epa-string
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'((((class color) (background dark))
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:foreground "lightyellow")
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(((class color) (background light))
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:foreground "blue4"))
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"Face used for displaying the string."
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:group 'epa-faces)
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(defface epa-mark
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'((default :weight bold)
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(((class color) (background dark)) :foreground "orange")
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(((class color) (background light)) :foreground "red"))
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"Face used for displaying the high validity."
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:group 'epa-faces)
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(defface epa-field-name
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'((default :weight bold)
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(((class color) (background dark)) :foreground "PaleTurquoise"))
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"Face for the name of the attribute field."
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:version "28.1"
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:group 'epa-faces)
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(defface epa-field-body
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'((default :slant italic)
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(((class color) (background dark)) :foreground "turquoise"))
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"Face for the body of the attribute field."
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:version "28.1"
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:group 'epa-faces)
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(defcustom epa-validity-face-alist
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'((unknown . epa-validity-disabled)
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(invalid . epa-validity-disabled)
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(disabled . epa-validity-disabled)
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(revoked . epa-validity-disabled)
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(expired . epa-validity-disabled)
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(none . epa-validity-low)
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(undefined . epa-validity-low)
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(never . epa-validity-low)
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(marginal . epa-validity-medium)
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(full . epa-validity-high)
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(ultimate . epa-validity-high))
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"An alist mapping validity values to faces."
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:version "28.1"
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:type '(repeat (cons symbol face))
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:group 'epa-faces)
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;;; Variables
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(defconst epa-pubkey-algorithm-letter-alist
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'((1 . ?R)
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(2 . ?r)
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(3 . ?s)
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(16 . ?g)
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(17 . ?D)
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(20 . ?G)))
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(defvar epa-protocol 'OpenPGP
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"The default protocol.
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The value can be either OpenPGP or CMS.
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You should bind this variable with `let', but do not set it globally.")
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(defvar epa-armor nil
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"If non-nil, epa commands create ASCII armored output.
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You should bind this variable with `let', but do not set it globally.")
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(defvar epa-textmode nil
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"If non-nil, epa commands treat input files as text.
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You should bind this variable with `let', but do not set it globally.")
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(defvar epa-keys-buffer nil)
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(defvar epa-key-buffer-alist nil)
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(defvar epa-key nil)
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(defvar epa-list-keys-arguments nil)
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(defvar epa-info-buffer nil)
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(defvar epa-error-buffer nil)
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(defvar epa-suppress-error-buffer nil)
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(defvar epa-last-coding-system-specified nil)
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(defvar epa-key-list-mode-map
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(let ((keymap (make-sparse-keymap)))
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(define-key keymap "\C-m" 'epa-show-key)
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(define-key keymap [?\t] 'forward-button)
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(define-key keymap [backtab] 'backward-button)
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(define-key keymap "m" 'epa-mark-key)
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(define-key keymap "u" 'epa-unmark-key)
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(define-key keymap "d" 'epa-decrypt-file)
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(define-key keymap "v" 'epa-verify-file)
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(define-key keymap "s" 'epa-sign-file)
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(define-key keymap "e" 'epa-encrypt-file)
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(define-key keymap "r" 'epa-delete-keys)
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(define-key keymap "i" 'epa-import-keys)
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(define-key keymap "o" 'epa-export-keys)
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(define-key keymap "g" 'revert-buffer)
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(define-key keymap "n" 'next-line)
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(define-key keymap "p" 'previous-line)
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(define-key keymap " " 'scroll-up-command)
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(define-key keymap [?\S-\ ] 'scroll-down-command)
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(define-key keymap [delete] 'scroll-down-command)
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(define-key keymap "q" 'epa-exit-buffer)
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keymap))
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(easy-menu-define epa-key-list-mode-menu epa-key-list-mode-map
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"Menu for `epa-key-list-mode'."
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'("Keys"
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["Export Keys" epa-export-keys
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:help "Export marked keys to a file"]
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["Import Keys" epa-import-keys
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:help "Import keys from a file"]
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["Delete Keys" epa-delete-keys
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:help "Delete Marked Keys"]
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"---"
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["Encrypt File..." epa-encrypt-file
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:help "Encrypt file for recipients"]
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["Decrypt File..." epa-decrypt-file
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:help "Decrypt file"]
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["Sign File..." epa-sign-file
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:help "Sign file by signers keys selected"]
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["Verify File..." epa-verify-file
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:help "Verify file"]
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"---"
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["Mark Key" epa-mark-key
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:help "Mark a key"]
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["Unmark Key" epa-unmark-key
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:help "Unmark a key"]))
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(defvar epa-key-mode-map
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(let ((keymap (make-sparse-keymap)))
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(define-key keymap "q" 'epa-exit-buffer)
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keymap))
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(defvar epa-info-mode-map
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(let ((keymap (make-sparse-keymap)))
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(define-key keymap "q" 'delete-window)
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keymap))
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(defvar epa-exit-buffer-function #'quit-window)
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(defun epa--button-key-text (key)
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(let ((primary-sub-key (car (epg-key-sub-key-list key)))
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(primary-user-id (car (epg-key-user-id-list key)))
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(validity (epg-sub-key-validity (car (epg-key-sub-key-list key)))))
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(propertize
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(concat
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(propertize
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(format "%c "
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(if (epg-sub-key-validity primary-sub-key)
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(car (rassq (epg-sub-key-validity primary-sub-key)
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epg-key-validity-alist))
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? ))
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'help-echo (format "Validity: %s"
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(epg-sub-key-validity primary-sub-key)))
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(propertize
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(concat
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(epg-sub-key-id primary-sub-key)
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" "
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(if primary-user-id
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(if (stringp (epg-user-id-string primary-user-id))
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(epg-user-id-string primary-user-id)
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(epg-decode-dn (epg-user-id-string primary-user-id)))
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""))
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'help-echo (format "Show %s"
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(epg-sub-key-id (car (epg-key-sub-key-list key))))))
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'face
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(if validity
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(cdr (assq validity epa-validity-face-alist))
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'default))))
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;;; Modes
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(define-derived-mode epa-key-list-mode special-mode "EPA Keys"
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"Major mode for `epa-list-keys'."
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(buffer-disable-undo)
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(setq truncate-lines t
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buffer-read-only t)
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(make-local-variable 'epa-exit-buffer-function)
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(setq-local revert-buffer-function #'epa--key-list-revert-buffer))
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(define-derived-mode epa-key-mode special-mode "EPA Key"
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"Major mode for a key description."
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(buffer-disable-undo)
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(setq truncate-lines t
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buffer-read-only t)
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(make-local-variable 'epa-exit-buffer-function))
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(define-derived-mode epa-info-mode special-mode "EPA Info"
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"Major mode for `epa-info-buffer'."
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(buffer-disable-undo)
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(setq truncate-lines t
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buffer-read-only t))
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;;; Commands
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;;;; Marking
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(defun epa-mark-key (&optional arg)
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"Mark a key on the current line.
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If ARG is non-nil, unmark the key."
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(interactive "P")
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(let ((inhibit-read-only t)
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buffer-read-only
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properties)
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(beginning-of-line)
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(unless (get-text-property (point) 'epa-key)
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(error "No key on this line"))
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(setq properties (text-properties-at (point)))
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(delete-char 1)
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(insert (if arg " " "*"))
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(set-text-properties (1- (point)) (point) properties)
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(forward-line)))
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(defun epa-unmark-key (&optional arg)
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"Unmark a key on the current line.
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If ARG is non-nil, mark the key."
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(interactive "P")
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(epa-mark-key (not arg)))
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;;;; Quitting
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(defun epa-exit-buffer ()
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"Exit the current buffer using `epa-exit-buffer-function'."
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(interactive)
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(funcall epa-exit-buffer-function))
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;;;; Listing and Selecting
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(defun epa--insert-keys (keys)
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(dolist (key keys)
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(insert
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(propertize
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(concat " " (epa--button-key-text key))
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'epa-key key
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;; Allow TAB to tab to the key.
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'button t
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'category t))
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(insert "\n")))
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(defun epa--list-keys (name secret &optional doc)
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"NAME specifies which key to list.
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SECRET says list data on the secret key (default, the public key).
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DOC is documentation text to insert at the start."
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(unless (and epa-keys-buffer
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(buffer-live-p epa-keys-buffer))
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(setq epa-keys-buffer (generate-new-buffer "*Keys*")))
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(set-buffer epa-keys-buffer)
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(epa-key-list-mode)
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(let ((inhibit-read-only t)
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buffer-read-only
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(point (point-min))
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(context (epg-make-context epa-protocol)))
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;; Find the end of the documentation text at the start.
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;; Set POINT to where it ends, or nil if ends at eob.
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(unless (get-text-property point 'epa-key)
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(setq point (next-single-property-change point 'epa-key)))
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;; If caller specified documentation text for that, replace the old
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;; documentation text (if any) with what was specified.
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;; Otherwise, preserve whatever intro text is present.
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(when doc
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(if (or point (not (eobp)))
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(delete-region (point-min) point))
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(insert doc)
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(setq point (point)))
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;; Now delete the key description text, if any.
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(when point
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(delete-region point
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(or (next-single-property-change point 'epa-list-keys)
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(point-max)))
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(goto-char point))
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(epa--insert-keys (epg-list-keys context name secret)))
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(setq-local epa-list-keys-arguments (list name secret))
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(goto-char (point-min))
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(pop-to-buffer (current-buffer)))
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;;;###autoload
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(defun epa-list-keys (&optional name)
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"List all keys matched with NAME from the public keyring."
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(interactive
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(if current-prefix-arg
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(let ((name (read-string "Pattern: "
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(if epa-list-keys-arguments
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(car epa-list-keys-arguments)))))
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(list (if (equal name "") nil name)))
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(list nil)))
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(epa--list-keys name nil
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"The letters at the start of a line have these meanings.
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e expired key. n never trust. m trust marginally. u trust ultimately.
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f trust fully (keys you have signed, usually).
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q trust status questionable. - trust status unspecified.
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See GPG documentation for more explanation.
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\n"))
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;;;###autoload
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(defun epa-list-secret-keys (&optional name)
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"List all keys matched with NAME from the private keyring."
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(interactive
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(if current-prefix-arg
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(let ((name (read-string "Pattern: "
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(if epa-list-keys-arguments
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(car epa-list-keys-arguments)))))
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(list (if (equal name "") nil name)))
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(list nil)))
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(epa--list-keys name t))
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(defun epa--key-list-revert-buffer (&optional _ignore-auto _noconfirm)
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(apply #'epa--list-keys epa-list-keys-arguments))
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(defun epa--marked-keys ()
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(or (with-current-buffer epa-keys-buffer
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(goto-char (point-min))
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(let (keys key)
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(while (re-search-forward "^\\*" nil t)
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(if (setq key (get-text-property (match-beginning 0)
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'epa-key))
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(setq keys (cons key keys))))
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(nreverse keys)))
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(let ((key (get-text-property (point-at-bol) 'epa-key)))
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(if key
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(list key)))))
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(defun epa--select-keys (prompt keys)
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(unless (and epa-keys-buffer
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(buffer-live-p epa-keys-buffer))
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(setq epa-keys-buffer (generate-new-buffer "*Keys*")))
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(save-window-excursion
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(with-current-buffer epa-keys-buffer
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(epa-key-list-mode)
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;; C-c C-c is the usual way to finish the selection (bug#11159).
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(define-key (current-local-map) "\C-c\C-c" 'exit-recursive-edit)
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(let ((inhibit-read-only t)
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buffer-read-only)
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(erase-buffer)
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(insert prompt "\n"
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(substitute-command-keys "\
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- `\\[epa-mark-key]' to mark a key on the line
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- `\\[epa-unmark-key]' to unmark a key on the line\n"))
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(insert-button "[Cancel]"
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'action (lambda (_button) (abort-recursive-edit)))
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(insert " ")
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(insert-button "[OK]"
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'action (lambda (_button) (exit-recursive-edit)))
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(insert "\n\n")
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(epa--insert-keys keys)
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(setq epa-exit-buffer-function #'abort-recursive-edit)
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(goto-char (point-min))
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(let ((display-buffer-mark-dedicated 'soft))
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(pop-to-buffer (current-buffer))))
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(unwind-protect
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(progn
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(recursive-edit)
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(epa--marked-keys))
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(kill-buffer epa-keys-buffer)))))
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;;;###autoload
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(defun epa-select-keys (context prompt &optional names secret)
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"Display a user's keyring and ask him to select keys.
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CONTEXT is an epg-context.
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PROMPT is a string to prompt with.
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NAMES is a list of strings to be matched with keys. If it is nil, all
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the keys are listed.
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If SECRET is non-nil, list secret keys instead of public keys."
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(let ((keys (epg-list-keys context names secret)))
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(epa--select-keys prompt keys)))
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;;;; Key Details
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(defun epa-show-key ()
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"Show a key on the current line."
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|
(interactive)
|
|
(if-let ((key (get-text-property (point) 'epa-key)))
|
|
(save-selected-window
|
|
(epa--show-key key))
|
|
(error "No key on this line")))
|
|
|
|
(defun epa--show-key (key)
|
|
(let* ((primary-sub-key (car (epg-key-sub-key-list key)))
|
|
(entry (assoc (epg-sub-key-id primary-sub-key)
|
|
epa-key-buffer-alist))
|
|
(inhibit-read-only t)
|
|
buffer-read-only
|
|
pointer)
|
|
(unless entry
|
|
(setq entry (cons (epg-sub-key-id primary-sub-key) nil)
|
|
epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
|
|
(unless (and (cdr entry)
|
|
(buffer-live-p (cdr entry)))
|
|
(setcdr entry (generate-new-buffer
|
|
(format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
|
|
(set-buffer (cdr entry))
|
|
(epa-key-mode)
|
|
(setq-local epa-key key)
|
|
(erase-buffer)
|
|
(setq pointer (epg-key-user-id-list key))
|
|
(while pointer
|
|
(if (car pointer)
|
|
(insert " "
|
|
(if (epg-user-id-validity (car pointer))
|
|
(char-to-string
|
|
(car (rassq (epg-user-id-validity (car pointer))
|
|
epg-key-validity-alist)))
|
|
" ")
|
|
" "
|
|
(if (stringp (epg-user-id-string (car pointer)))
|
|
(epg-user-id-string (car pointer))
|
|
(epg-decode-dn (epg-user-id-string (car pointer))))
|
|
"\n"))
|
|
(setq pointer (cdr pointer)))
|
|
(setq pointer (epg-key-sub-key-list key))
|
|
(while pointer
|
|
(insert " "
|
|
(if (epg-sub-key-validity (car pointer))
|
|
(char-to-string
|
|
(car (rassq (epg-sub-key-validity (car pointer))
|
|
epg-key-validity-alist)))
|
|
" ")
|
|
" "
|
|
(epg-sub-key-id (car pointer))
|
|
" "
|
|
(format "%dbits"
|
|
(epg-sub-key-length (car pointer)))
|
|
" "
|
|
(cdr (assq (epg-sub-key-algorithm (car pointer))
|
|
epg-pubkey-algorithm-alist))
|
|
"\n\tCreated: "
|
|
(condition-case nil
|
|
(format-time-string "%Y-%m-%d"
|
|
(epg-sub-key-creation-time (car pointer)))
|
|
(error "????-??-??"))
|
|
(if (epg-sub-key-expiration-time (car pointer))
|
|
(format (if (time-less-p nil
|
|
(epg-sub-key-expiration-time
|
|
(car pointer)))
|
|
"\n\tExpires: %s"
|
|
"\n\tExpired: %s")
|
|
(condition-case nil
|
|
(format-time-string "%Y-%m-%d"
|
|
(epg-sub-key-expiration-time
|
|
(car pointer)))
|
|
(error "????-??-??")))
|
|
"")
|
|
"\n\tCapabilities: "
|
|
(mapconcat #'symbol-name
|
|
(epg-sub-key-capability (car pointer))
|
|
" ")
|
|
"\n\tFingerprint: "
|
|
(epg-sub-key-fingerprint (car pointer))
|
|
"\n")
|
|
(setq pointer (cdr pointer)))
|
|
(goto-char (point-min))
|
|
(pop-to-buffer (current-buffer))))
|
|
|
|
;;;; Encryption and Signatures
|
|
|
|
(defun epa-display-info (info)
|
|
(if epa-popup-info-window
|
|
(save-selected-window
|
|
(unless (and epa-info-buffer (buffer-live-p epa-info-buffer))
|
|
(setq epa-info-buffer (generate-new-buffer "*Info*")))
|
|
(if (get-buffer-window epa-info-buffer)
|
|
(delete-window (get-buffer-window epa-info-buffer)))
|
|
(with-current-buffer epa-info-buffer
|
|
(let ((inhibit-read-only t)
|
|
buffer-read-only)
|
|
(erase-buffer)
|
|
(insert info))
|
|
(epa-info-mode)
|
|
(goto-char (point-min)))
|
|
(if (> (window-height)
|
|
epa-info-window-height)
|
|
(set-window-buffer (split-window nil (- (window-height)
|
|
epa-info-window-height))
|
|
epa-info-buffer)
|
|
(pop-to-buffer epa-info-buffer)
|
|
(if (> (window-height) epa-info-window-height)
|
|
(shrink-window (- (window-height) epa-info-window-height)))))
|
|
(message "%s" info)))
|
|
|
|
(defun epa-display-error (context)
|
|
(unless (or (equal (epg-context-error-output context) "")
|
|
epa-suppress-error-buffer)
|
|
(let ((buffer (get-buffer-create "*Error*")))
|
|
(save-selected-window
|
|
(unless (and epa-error-buffer (buffer-live-p epa-error-buffer))
|
|
(setq epa-error-buffer (generate-new-buffer "*Error*")))
|
|
(if (get-buffer-window epa-error-buffer)
|
|
(delete-window (get-buffer-window epa-error-buffer)))
|
|
(with-current-buffer buffer
|
|
(let ((inhibit-read-only t)
|
|
buffer-read-only)
|
|
(erase-buffer)
|
|
(insert (format
|
|
(pcase (epg-context-operation context)
|
|
('decrypt "Error while decrypting with \"%s\":")
|
|
('verify "Error while verifying with \"%s\":")
|
|
('sign "Error while signing with \"%s\":")
|
|
('encrypt "Error while encrypting with \"%s\":")
|
|
('import-keys "Error while importing keys with \"%s\":")
|
|
('export-keys "Error while exporting keys with \"%s\":")
|
|
(_ "Error while executing \"%s\":\n\n"))
|
|
(epg-context-program context))
|
|
"\n\n"
|
|
(epg-context-error-output context)))
|
|
(epa-info-mode)
|
|
(goto-char (point-min)))
|
|
(display-buffer buffer)))))
|
|
|
|
(defun epa-passphrase-callback-function (context key-id handback)
|
|
(if (eq key-id 'SYM)
|
|
(read-passwd
|
|
(format "Passphrase for symmetric encryption%s: "
|
|
;; Add the file name to the prompt, if any.
|
|
(if (stringp handback)
|
|
(format " for %s" handback)
|
|
""))
|
|
(eq (epg-context-operation context) 'encrypt))
|
|
(read-passwd
|
|
(if (eq key-id 'PIN)
|
|
"Passphrase for PIN: "
|
|
(let ((entry (assoc key-id epg-user-id-alist)))
|
|
(if entry
|
|
(format "Passphrase for %s %s: " key-id (cdr entry))
|
|
(format "Passphrase for %s: " key-id)))))))
|
|
|
|
(defun epa-progress-callback-function (_context what _char current total
|
|
handback)
|
|
(let ((prompt (or handback
|
|
(format "Processing %s: " what))))
|
|
;; According to gnupg/doc/DETAIL: a "total" of 0 indicates that
|
|
;; the total amount is not known. The condition TOTAL && CUR ==
|
|
;; TOTAL may be used to detect the end of an operation.
|
|
(if (> total 0)
|
|
(if (= current total)
|
|
(message "%s...done" prompt)
|
|
(message "%s...%d%%" prompt
|
|
(floor (* 100.0 current) total)))
|
|
(message "%s..." prompt))))
|
|
|
|
(defun epa-read-file-name (input)
|
|
"Interactively read an output file name based on INPUT file name."
|
|
(setq input (file-name-sans-extension (expand-file-name input)))
|
|
(expand-file-name
|
|
(read-file-name
|
|
(concat "To file (default " (file-name-nondirectory input) ") ")
|
|
(file-name-directory input)
|
|
input)))
|
|
|
|
;;;###autoload
|
|
(defun epa-decrypt-file (decrypt-file &optional plain-file)
|
|
"Decrypt DECRYPT-FILE into PLAIN-FILE.
|
|
If you do not specify PLAIN-FILE, this functions prompts for the value to use."
|
|
(interactive
|
|
(let* ((file (read-file-name "File to decrypt: "))
|
|
(plain (epa-read-file-name file)))
|
|
(list file plain)))
|
|
(or plain-file (setq plain-file (epa-read-file-name decrypt-file)))
|
|
(setq decrypt-file (expand-file-name decrypt-file))
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
(format "Decrypting %s..."
|
|
(file-name-nondirectory decrypt-file))))
|
|
(message "Decrypting %s..." (file-name-nondirectory decrypt-file))
|
|
(condition-case error
|
|
(epg-decrypt-file context decrypt-file plain-file)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Decrypting %s...wrote %s" (file-name-nondirectory decrypt-file)
|
|
(file-name-nondirectory plain-file))
|
|
(if (epg-context-result-for context 'verify)
|
|
(epa-display-info (epg-verify-result-to-string
|
|
(epg-context-result-for context 'verify))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-verify-file (file)
|
|
"Verify FILE."
|
|
(interactive "fFile: ")
|
|
(setq file (expand-file-name file))
|
|
(let* ((context (epg-make-context epa-protocol))
|
|
(plain (if (equal (file-name-extension file) "sig")
|
|
(file-name-sans-extension file))))
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
(format "Verifying %s..."
|
|
(file-name-nondirectory file))))
|
|
(message "Verifying %s..." (file-name-nondirectory file))
|
|
(condition-case error
|
|
(epg-verify-file context file plain)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Verifying %s...done" (file-name-nondirectory file))
|
|
(if (epg-context-result-for context 'verify)
|
|
(epa-display-info (epg-verify-result-to-string
|
|
(epg-context-result-for context 'verify)))
|
|
(message "Verification not successful"))))
|
|
|
|
(defun epa--read-signature-type ()
|
|
(let (type c)
|
|
(while (null type)
|
|
(message "Signature type (n,c,d,?) ")
|
|
(setq c (read-char))
|
|
(cond ((eq c ?c)
|
|
(setq type 'clear))
|
|
((eq c ?d)
|
|
(setq type 'detached))
|
|
((eq c ??)
|
|
(with-output-to-temp-buffer "*Help*"
|
|
(with-current-buffer standard-output
|
|
(insert "\
|
|
n - Create a normal signature
|
|
c - Create a cleartext signature
|
|
d - Create a detached signature
|
|
? - Show this help
|
|
"))))
|
|
(t
|
|
(setq type 'normal))))
|
|
type))
|
|
|
|
;;;###autoload
|
|
(defun epa-sign-file (file signers mode)
|
|
"Sign FILE by SIGNERS keys selected."
|
|
(interactive
|
|
(let ((verbose current-prefix-arg))
|
|
(list (expand-file-name (read-file-name "File: "))
|
|
(if verbose
|
|
(epa-select-keys (epg-make-context epa-protocol)
|
|
"Select keys for signing.
|
|
If no one is selected, default secret key is used. "
|
|
nil t))
|
|
(if verbose
|
|
(epa--read-signature-type)
|
|
'clear))))
|
|
(let ((signature (concat file
|
|
(if (eq epa-protocol 'OpenPGP)
|
|
(if (or epa-armor
|
|
(not (memq mode
|
|
'(nil t normal detached))))
|
|
".asc"
|
|
(if (memq mode '(t detached))
|
|
".sig"
|
|
".gpg"))
|
|
(if (memq mode '(t detached))
|
|
".p7s"
|
|
".p7m"))))
|
|
(context (epg-make-context epa-protocol)))
|
|
(setf (epg-context-armor context) epa-armor)
|
|
(setf (epg-context-textmode context) epa-textmode)
|
|
(setf (epg-context-signers context) signers)
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
(format "Signing %s..."
|
|
(file-name-nondirectory file))))
|
|
(message "Signing %s..." (file-name-nondirectory file))
|
|
(condition-case error
|
|
(epg-sign-file context file signature mode)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Signing %s...wrote %s" (file-name-nondirectory file)
|
|
(file-name-nondirectory signature))))
|
|
|
|
;;;###autoload
|
|
(defun epa-encrypt-file (file recipients)
|
|
"Encrypt FILE for RECIPIENTS."
|
|
(interactive
|
|
(list (expand-file-name (read-file-name "File: "))
|
|
(epa-select-keys (epg-make-context epa-protocol)
|
|
"Select recipients for encryption.
|
|
If no one is selected, symmetric encryption will be performed. ")))
|
|
(let ((cipher (concat file (if (eq epa-protocol 'OpenPGP)
|
|
(if epa-armor ".asc" ".gpg")
|
|
".p7m")))
|
|
(context (epg-make-context epa-protocol)))
|
|
(setf (epg-context-armor context) epa-armor)
|
|
(setf (epg-context-textmode context) epa-textmode)
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
(format "Encrypting %s..."
|
|
(file-name-nondirectory file))))
|
|
(message "Encrypting %s..." (file-name-nondirectory file))
|
|
(condition-case error
|
|
(epg-encrypt-file context file recipients cipher)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Encrypting %s...wrote %s" (file-name-nondirectory file)
|
|
(file-name-nondirectory cipher))))
|
|
|
|
;;;###autoload
|
|
(defun epa-decrypt-region (start end &optional make-buffer-function)
|
|
"Decrypt the current region between START and END.
|
|
|
|
If MAKE-BUFFER-FUNCTION is non-nil, call it to prepare an output buffer.
|
|
It should return that buffer. If it copies the input, it should
|
|
delete the text now being decrypted. It should leave point at the
|
|
proper place to insert the plaintext.
|
|
|
|
Be careful about using this command in Lisp programs!
|
|
Since this function operates on regions, it does some tricks such
|
|
as coding-system detection and unibyte/multibyte conversion. If
|
|
you are sure how the data in the region should be treated, you
|
|
should consider using the string based counterpart
|
|
`epg-decrypt-string', or the file based counterpart
|
|
`epg-decrypt-file' instead.
|
|
|
|
For example:
|
|
|
|
\(let ((context (epg-make-context \\='OpenPGP)))
|
|
(decode-coding-string
|
|
(epg-decrypt-string context (buffer-substring start end))
|
|
\\='utf-8))"
|
|
(interactive "r")
|
|
(save-excursion
|
|
(let ((context (epg-make-context epa-protocol))
|
|
plain)
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
"Decrypting..."))
|
|
(message "Decrypting...")
|
|
(condition-case error
|
|
(setq plain (epg-decrypt-string context (buffer-substring start end)))
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Decrypting...done")
|
|
(setq plain (decode-coding-string
|
|
plain
|
|
(or coding-system-for-read
|
|
(get-text-property start 'epa-coding-system-used)
|
|
'undecided)))
|
|
(if make-buffer-function
|
|
(with-current-buffer (funcall make-buffer-function)
|
|
(let ((inhibit-read-only t))
|
|
(insert plain)))
|
|
(if (or (eq epa-replace-original-text t)
|
|
(and epa-replace-original-text
|
|
(y-or-n-p "Replace the original text? ")))
|
|
(let ((inhibit-read-only t))
|
|
(delete-region start end)
|
|
(goto-char start)
|
|
(insert plain))
|
|
(with-output-to-temp-buffer "*Temp*"
|
|
(set-buffer standard-output)
|
|
(insert plain)
|
|
(epa-info-mode))))
|
|
(if (epg-context-result-for context 'verify)
|
|
(epa-display-info (epg-verify-result-to-string
|
|
(epg-context-result-for context 'verify)))))))
|
|
|
|
(defun epa--find-coding-system-for-mime-charset (mime-charset)
|
|
;; Find the first coding system which corresponds to MIME-CHARSET.
|
|
(let ((pointer (coding-system-list)))
|
|
(while (and pointer
|
|
(not (eq (coding-system-get (car pointer) 'mime-charset)
|
|
mime-charset)))
|
|
(setq pointer (cdr pointer)))
|
|
(car pointer)))
|
|
|
|
;;;###autoload
|
|
(defun epa-decrypt-armor-in-region (start end)
|
|
"Decrypt OpenPGP armors in the current region between START and END.
|
|
|
|
Don't use this command in Lisp programs!
|
|
See the reason described in the `epa-decrypt-region' documentation."
|
|
(declare (interactive-only t))
|
|
(interactive "r")
|
|
(save-excursion
|
|
(save-restriction
|
|
(narrow-to-region start end)
|
|
(goto-char start)
|
|
(let (armor-start armor-end)
|
|
(while (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
|
|
(setq armor-start (match-beginning 0)
|
|
armor-end (re-search-forward "^-----END PGP MESSAGE-----$"
|
|
nil t))
|
|
(unless armor-end
|
|
(error "Encryption armor beginning has no matching end"))
|
|
(goto-char armor-start)
|
|
(let ((coding-system-for-read
|
|
(or coding-system-for-read
|
|
(if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
|
|
(epa--find-coding-system-for-mime-charset
|
|
(intern (downcase (match-string 1))))))))
|
|
(goto-char armor-end)
|
|
(epa-decrypt-region armor-start armor-end)))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-verify-region (start end)
|
|
"Verify the current region between START and END.
|
|
|
|
Don't use this command in Lisp programs!
|
|
Since this function operates on regions, it does some tricks such
|
|
as coding-system detection and unibyte/multibyte conversion. If
|
|
you are sure how the data in the region should be treated, you
|
|
should consider using the string based counterpart
|
|
`epg-verify-string', or the file based counterpart
|
|
`epg-verify-file' instead.
|
|
|
|
For example:
|
|
|
|
\(let ((context (epg-make-context \\='OpenPGP)))
|
|
(decode-coding-string
|
|
(epg-verify-string context (buffer-substring start end))
|
|
\\='utf-8))"
|
|
(declare (interactive-only t))
|
|
(interactive "r")
|
|
(let ((context (epg-make-context epa-protocol))
|
|
plain)
|
|
(setf (epg-context-progress-callback context)
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
"Verifying..."))
|
|
(message "Verifying...")
|
|
(condition-case error
|
|
(setq plain (epg-verify-string
|
|
context
|
|
(encode-coding-string
|
|
(buffer-substring start end)
|
|
(or coding-system-for-write
|
|
(get-text-property start 'epa-coding-system-used)))))
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Verifying...done")
|
|
(setq plain (decode-coding-string
|
|
plain
|
|
(or coding-system-for-read
|
|
(get-text-property start 'epa-coding-system-used)
|
|
'undecided)))
|
|
(unless (epg-context-result-for context 'verify)
|
|
(error "Unable to verify region"))
|
|
(if (or (eq epa-replace-original-text t)
|
|
(and epa-replace-original-text
|
|
(y-or-n-p "Replace the original text? ")))
|
|
(let ((inhibit-read-only t)
|
|
buffer-read-only)
|
|
(delete-region start end)
|
|
(goto-char start)
|
|
(insert plain))
|
|
(with-output-to-temp-buffer "*Temp*"
|
|
(set-buffer standard-output)
|
|
(insert plain)
|
|
(epa-info-mode)))
|
|
(if (epg-context-result-for context 'verify)
|
|
(epa-display-info (epg-verify-result-to-string
|
|
(epg-context-result-for context 'verify))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-verify-cleartext-in-region (start end)
|
|
"Verify OpenPGP cleartext signed messages in the current region
|
|
between START and END.
|
|
|
|
Don't use this command in Lisp programs!
|
|
See the reason described in the `epa-verify-region' documentation."
|
|
(declare (interactive-only t))
|
|
(interactive "r")
|
|
(save-excursion
|
|
(save-restriction
|
|
(narrow-to-region start end)
|
|
(goto-char start)
|
|
(let (cleartext-start cleartext-end)
|
|
(while (re-search-forward "-----BEGIN PGP SIGNED MESSAGE-----$"
|
|
nil t)
|
|
(setq cleartext-start (match-beginning 0))
|
|
(unless (re-search-forward "^-----BEGIN PGP SIGNATURE-----$"
|
|
nil t)
|
|
(error "Invalid cleartext signed message"))
|
|
(setq cleartext-end (re-search-forward
|
|
"^-----END PGP SIGNATURE-----$"
|
|
nil t))
|
|
(unless cleartext-end
|
|
(error "No cleartext tail"))
|
|
(with-suppressed-warnings ((interactive-only epa-verify-region))
|
|
(epa-verify-region cleartext-start cleartext-end)))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-sign-region (start end signers mode)
|
|
"Sign the current region between START and END by SIGNERS keys selected.
|
|
|
|
Don't use this command in Lisp programs!
|
|
Since this function operates on regions, it does some tricks such
|
|
as coding-system detection and unibyte/multibyte conversion. If
|
|
you are sure how the data should be treated, you should consider
|
|
using the string based counterpart `epg-sign-string', or the file
|
|
based counterpart `epg-sign-file' instead.
|
|
|
|
For example:
|
|
|
|
\(let ((context (epg-make-context \\='OpenPGP)))
|
|
(epg-sign-string
|
|
context
|
|
(encode-coding-string (buffer-substring start end) \\='utf-8)))"
|
|
(declare (interactive-only t))
|
|
(interactive
|
|
(let ((verbose current-prefix-arg))
|
|
(setq epa-last-coding-system-specified
|
|
(or coding-system-for-write
|
|
(select-safe-coding-system
|
|
(region-beginning) (region-end))))
|
|
(list (region-beginning) (region-end)
|
|
(if verbose
|
|
(epa-select-keys (epg-make-context epa-protocol)
|
|
"Select keys for signing.
|
|
If no one is selected, default secret key is used. "
|
|
nil t))
|
|
(if verbose
|
|
(epa--read-signature-type)
|
|
'clear))))
|
|
(save-excursion
|
|
(let ((context (epg-make-context epa-protocol))
|
|
signature)
|
|
;;(setf (epg-context-armor context) epa-armor)
|
|
(setf (epg-context-armor context) t)
|
|
;;(setf (epg-context-textmode context) epa-textmode)
|
|
(setf (epg-context-textmode context) t)
|
|
(setf (epg-context-signers context) signers)
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
"Signing..."))
|
|
(message "Signing...")
|
|
(condition-case error
|
|
(setq signature (epg-sign-string context
|
|
(encode-coding-string
|
|
(buffer-substring start end)
|
|
epa-last-coding-system-specified)
|
|
mode))
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Signing...done")
|
|
(delete-region start end)
|
|
(goto-char start)
|
|
(add-text-properties (point)
|
|
(progn
|
|
(insert (decode-coding-string
|
|
signature
|
|
(or coding-system-for-read
|
|
epa-last-coding-system-specified)))
|
|
(point))
|
|
(list 'epa-coding-system-used
|
|
epa-last-coding-system-specified
|
|
'front-sticky nil
|
|
'rear-nonsticky t)))))
|
|
|
|
(define-obsolete-function-alias 'epa--derived-mode-p 'derived-mode-p "28.1")
|
|
|
|
;;;###autoload
|
|
(defun epa-encrypt-region (start end recipients sign signers)
|
|
"Encrypt the current region between START and END for RECIPIENTS.
|
|
|
|
Don't use this command in Lisp programs!
|
|
Since this function operates on regions, it does some tricks such
|
|
as coding-system detection and unibyte/multibyte conversion. If
|
|
you are sure how the data should be treated, you should consider
|
|
using the string based counterpart `epg-encrypt-string', or the
|
|
file based counterpart `epg-encrypt-file' instead.
|
|
|
|
For example:
|
|
|
|
\(let ((context (epg-make-context \\='OpenPGP)))
|
|
(epg-encrypt-string
|
|
context
|
|
(encode-coding-string (buffer-substring start end) \\='utf-8)
|
|
nil))"
|
|
(declare (interactive-only t))
|
|
(interactive
|
|
(let ((verbose current-prefix-arg)
|
|
(context (epg-make-context epa-protocol))
|
|
sign)
|
|
(setq epa-last-coding-system-specified
|
|
(or coding-system-for-write
|
|
(select-safe-coding-system
|
|
(region-beginning) (region-end))))
|
|
(list (region-beginning) (region-end)
|
|
(epa-select-keys context
|
|
"Select recipients for encryption.
|
|
If no one is selected, symmetric encryption will be performed. ")
|
|
(setq sign (if verbose (y-or-n-p "Sign? ")))
|
|
(if sign
|
|
(epa-select-keys context
|
|
"Select keys for signing. ")))))
|
|
(save-excursion
|
|
(let ((context (epg-make-context epa-protocol))
|
|
cipher)
|
|
;;(setf (epg-context-armor context) epa-armor)
|
|
(setf (epg-context-armor context) t)
|
|
;;(setf (epg-context-textmode context) epa-textmode)
|
|
(setf (epg-context-textmode context) t)
|
|
(if sign
|
|
(setf (epg-context-signers context) signers))
|
|
(epg-context-set-passphrase-callback context
|
|
#'epa-passphrase-callback-function)
|
|
(epg-context-set-progress-callback context
|
|
(cons
|
|
#'epa-progress-callback-function
|
|
"Encrypting..."))
|
|
(message "Encrypting...")
|
|
(condition-case error
|
|
(setq cipher (epg-encrypt-string context
|
|
(encode-coding-string
|
|
(buffer-substring start end)
|
|
epa-last-coding-system-specified)
|
|
recipients
|
|
sign))
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Encrypting...done")
|
|
(delete-region start end)
|
|
(goto-char start)
|
|
(add-text-properties (point)
|
|
(progn
|
|
(insert cipher)
|
|
(point))
|
|
(list 'epa-coding-system-used
|
|
epa-last-coding-system-specified
|
|
'front-sticky nil
|
|
'rear-nonsticky t)))))
|
|
|
|
;;;; Key Management
|
|
|
|
;;;###autoload
|
|
(defun epa-delete-keys (keys &optional allow-secret)
|
|
"Delete selected KEYS."
|
|
(interactive
|
|
(let ((keys (epa--marked-keys)))
|
|
(unless keys
|
|
(error "No keys selected"))
|
|
(list keys
|
|
(eq (nth 1 epa-list-keys-arguments) t))))
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
(message "Deleting...")
|
|
(condition-case error
|
|
(epg-delete-keys context keys allow-secret)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Deleting...done")
|
|
(apply #'epa--list-keys epa-list-keys-arguments)))
|
|
|
|
;;;###autoload
|
|
(defun epa-import-keys (file)
|
|
"Import keys from FILE."
|
|
(interactive "fFile: ")
|
|
(setq file (expand-file-name file))
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
(message "Importing %s..." (file-name-nondirectory file))
|
|
(condition-case nil
|
|
(progn
|
|
(epg-import-keys-from-file context file)
|
|
(message "Importing %s...done" (file-name-nondirectory file)))
|
|
(error
|
|
(epa-display-error context)
|
|
(message "Importing %s...failed" (file-name-nondirectory file))))
|
|
(if (epg-context-result-for context 'import)
|
|
(epa-display-info (epg-import-result-to-string
|
|
(epg-context-result-for context 'import))))
|
|
;; FIXME: Why not use the derived-mode-p?
|
|
(if (eq major-mode 'epa-key-list-mode)
|
|
(apply #'epa--list-keys epa-list-keys-arguments))))
|
|
|
|
;;;###autoload
|
|
(defun epa-import-keys-region (start end)
|
|
"Import keys from the region."
|
|
(interactive "r")
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
(message "Importing...")
|
|
(condition-case nil
|
|
(progn
|
|
(epg-import-keys-from-string context (buffer-substring start end))
|
|
(message "Importing...done"))
|
|
(error
|
|
(epa-display-error context)
|
|
(message "Importing...failed")))
|
|
(if (epg-context-result-for context 'import)
|
|
(epa-display-info (epg-import-result-to-string
|
|
(epg-context-result-for context 'import))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-import-armor-in-region (start end)
|
|
"Import keys in the OpenPGP armor format in the current region
|
|
between START and END."
|
|
(interactive "r")
|
|
(save-excursion
|
|
(save-restriction
|
|
(narrow-to-region start end)
|
|
(goto-char start)
|
|
(let (armor-start armor-end)
|
|
(while (re-search-forward
|
|
"-----BEGIN \\(PGP \\(PUBLIC\\|PRIVATE\\) KEY BLOCK\\)-----$"
|
|
nil t)
|
|
(setq armor-start (match-beginning 0)
|
|
armor-end (re-search-forward
|
|
(concat "^-----END " (match-string 1) "-----$")
|
|
nil t))
|
|
(unless armor-end
|
|
(error "No armor tail"))
|
|
(epa-import-keys-region armor-start armor-end))))))
|
|
|
|
;;;###autoload
|
|
(defun epa-export-keys (keys file)
|
|
"Export selected KEYS to FILE."
|
|
(interactive
|
|
(let ((keys (epa--marked-keys))
|
|
default-name)
|
|
(unless keys
|
|
(error "No keys selected"))
|
|
(setq default-name
|
|
(expand-file-name
|
|
(concat (epg-sub-key-id (car (epg-key-sub-key-list (car keys))))
|
|
(if epa-armor ".asc" ".gpg"))
|
|
default-directory))
|
|
(list keys
|
|
(expand-file-name
|
|
(read-file-name
|
|
(concat "To file (default "
|
|
(file-name-nondirectory default-name)
|
|
") ")
|
|
(file-name-directory default-name)
|
|
default-name)))))
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
(setf (epg-context-armor context) epa-armor)
|
|
(message "Exporting to %s..." (file-name-nondirectory file))
|
|
(condition-case error
|
|
(epg-export-keys-to-file context keys file)
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))
|
|
(message "Exporting to %s...done" (file-name-nondirectory file))))
|
|
|
|
;;;###autoload
|
|
(defun epa-insert-keys (keys)
|
|
"Insert selected KEYS after the point."
|
|
(interactive
|
|
(list (epa-select-keys (epg-make-context epa-protocol)
|
|
"Select keys to export.
|
|
If no one is selected, default public key is exported. ")))
|
|
(let ((context (epg-make-context epa-protocol)))
|
|
;;(setf (epg-context-armor context) epa-armor)
|
|
(setf (epg-context-armor context) t)
|
|
(condition-case error
|
|
(insert (epg-export-keys-to-string context keys))
|
|
(error
|
|
(epa-display-error context)
|
|
(signal (car error) (cdr error))))))
|
|
|
|
(provide 'epa)
|
|
|
|
;;; epa.el ends here
|