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1 ;;; crypt.el --- code for handling all sorts of compressed and encrypted files
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2
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3 ;; Author: Lawrence R. Dodd <dodd@roebling.poly.edu>
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4 ;; Rod Whitby <rwhitby@research.canon.oz.au>
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5 ;; Kyle E. Jones <kyle@uunet.uu.net>
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6 ;; Maintainer: Lawrence R. Dodd <dodd@roebling.poly.edu>
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7 ;; Created: crypt.el in 1988, crypt++.el on 18 Jan 1993
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8 ;; Version: 2.83
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9 ;; Date: 1994/03/31 12:30:17
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10 ;; Keywords: extensions
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11
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12 ;;; Copyright (C) 1994 Lawrence R. Dodd
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13 ;;; Copyright (C) 1993 Lawrence R. Dodd and Rod Whitby
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14 ;;; Copyright (C) 1988, 1989, 1990 Kyle E. Jones
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15 ;;;
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16 ;;; This program is free software; you can redistribute it and/or modify
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17 ;;; it under the terms of the GNU General Public License as published by
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18 ;;; the Free Software Foundation; either version 2 of the License, or
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19 ;;; (at your option) any later version.
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20 ;;;
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21 ;;; This program is distributed in the hope that it will be useful,
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22 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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23 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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24 ;;; GNU General Public License for more details.
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25 ;;;
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26 ;;; You should have received a copy of the GNU General Public License
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27 ;;; along with this program; if not, write to the Free Software
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28 ;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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29
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30 ;;; Synched up with: Not in FSF.
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31
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32 ;;; Commentary:
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33
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34 ;;; NOTE: Apparently not being maintained by the author, who now
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35 ;;; uses jka-compr.el. --ben (1/26/96)
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36 ;;; Included patch (1/26/96)
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37
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38 ;;; Please see notes on INSTALLATION and USAGE on the pages below.
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39
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40 ;;; LCD Archive Entry:
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41 ;;; crypt++|Rod Whitby and Lawrence R. Dodd|dodd@roebling.poly.edu|
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42 ;;; Code for handling all sorts of compressed and encrypted files.|
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43 ;;; 1994/03/31 12:30:17|2.83|~/misc/crypt++.el.Z|
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44
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45 ;;; AVAILABLE:
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46 ;;;
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47 ;;; via anonymous ftp to roebling.poly.edu [128.238.5.31] in
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48 ;;; /pub/lisp/crypt++.el.gz
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49 ;;;
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50 ;;; via anonymous ftp to archive.cis.ohio-state.edu [128.146.8.52] in
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51 ;;; /pub/gnu/emacs/elisp-archive/misc/crypt++.el.Z
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52
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53 ;;; BUG REPORTS
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54 ;;;
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55 ;;; Type M-x crypt-submit-report to generate a bug report template or put your
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56 ;;; cursor at the end of this line and type C-x C-e: (crypt-submit-report)
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57 ;;;
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58 ;;; Please note that this bug-report facility (crypt-submit-report) uses Barry
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59 ;;; Warsaw's reporter.el which is part of GNU Emacs v19 and bundled with many
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60 ;;; other packages. If needed, you can obtain a copy of reporter.el at
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61 ;;; /roebling.poly.edu:/pub/reporter.el or the elisp-archive. In fact,
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62 ;;; crypt-submit-report will attempt to ange-ftp a copy for you from roebling
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63 ;;; if you do not have one accessible.
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64
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65 ;;; Lawrence R. Dodd <dodd@roebling.poly.edu>
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66 ;;; Polytechnic University
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67 ;;; Brooklyn, New York USA
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68
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69 ;;; VERSION:
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70 ;;;
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71 ;;; Version: 2.83
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72 ;;; Ident: crypt++.el,v 2.82 1994/03/31 12:30:17 dodd Exp
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73 ;;; Date: 1994/03/31 12:30:17
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74
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75
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76 ;;; INSTALLATION:
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77 ;;;
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78 ;;; To use this package, simply put it in a file called "crypt.el" in a Lisp
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79 ;;; directory known to Emacs (see `load-path'), byte-compile it (you may get a
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80 ;;; warning saying that the function reporter-submit-bug-report is not known
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81 ;;; to be defined -- ignore it), and put the line:
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82 ;;;
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83 ;;; (require 'crypt)
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84 ;;;
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85 ;;; in your ~/.emacs file or in the file default.el in the ../lisp directory
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86 ;;; of the Emacs distribution. Do not bother trying to autoload this file;
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87 ;;; this package uses find-file and write-file hooks and thus should be loaded
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88 ;;; the first time you visit any sort of file. Any package loaded after this
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89 ;;; one that appends something to `write-file-hooks' will not be executed
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90 ;;; because this package writes out the file. Other packages that append to
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91 ;;; `write-file-hooks' should either be modified to prepend to that hook or be
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92 ;;; loaded before this one (preferably the former).
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93
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94 ;;; NOTE: encryption users should set `crypt-encryption-type' to one of the
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95 ;;; values in `crypt-encryption-alist' (see USAGE below).
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96
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97 ;;; SEE ALSO: /roebling.poly.edu:/pub/crypt++-fnf.el for file-not-found
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98 ;;; support for GNU Emacs.
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99
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100 ;;; SPECIAL NOTES:
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101 ;;;
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102 ;;; If crypt is dumped with the emacs executable, or if it has already been
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103 ;;; loaded in an emacs session, then modifying the variables used in building
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104 ;;; the encryption and encoding tables will have no effect until these tables
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105 ;;; are rebuilt. This may be done with `M-x crypt-rebuild-tables'. See USAGE
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106 ;;; below to determine variables for which this is needed. For example,
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107 ;;; post-load changes to `crypt-encryption-file-extension' or
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108 ;;; `crypt-freeze-vs-fortran' can be incorporated into the encryption table
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109 ;;; via `M-x crypt-rebuild-tables'. Similarly, post-load changes to
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110 ;;; `crypt-bind-insert-file' are handled with `M-x crypt-bind-insert-file'.
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111
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112
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113 ;;; USAGE:
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114 ;;;
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115 ;;; By default, intended to be transparent. User-defined variables
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116 ;;;
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117 ;;; controlling ENCRYPTION are
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118 ;;;
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119 ;;; crypt-encryption-type
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120 ;;; crypt-encryption-file-extension
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121 ;;; crypt-never-ever-decrypt
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122 ;;; crypt-auto-write-buffer-encrypted
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123 ;;; crypt-confirm-password
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124 ;;; crypt-encrypted-disable-auto-save
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125 ;;; crypt-encryption-alist
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126 ;;;
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127 ;;; controlling ENCODING are
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128 ;;;
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129 ;;; crypt-auto-decode-buffer
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130 ;;; crypt-auto-write-buffer
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131 ;;; crypt-query-if-interactive
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132 ;;; crypt-no-extension-implies-plain
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133 ;;; crypt-freeze-vs-fortran
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134 ;;; crypt-compact-vs-C++
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135 ;;; crypt-ignored-filenames
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136 ;;; crypt-default-encoding
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137 ;;; crypt-encoded-disable-auto-save
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138 ;;; crypt-encoding-alist
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139 ;;;
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140 ;;; controlling file insertion are
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141 ;;;
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142 ;;; crypt-bind-insert-file
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143 ;;; crypt-auto-decode-insert
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144 ;;;
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145 ;;; To find out more about these variables, load this file, put your cursor at
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146 ;;; the end of any of the variable names, and hit C-h v [RET].
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147 ;;;
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148 ;;; NOTE: encryption users should set `crypt-encryption-type' to one of the
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149 ;;; values in `crypt-encryption-alist'
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150 ;;;
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151 ;;; Although rarely needed, the following functions may be called interactively
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152 ;;;
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153 ;;; (crypt-encoded-mode)
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154 ;;; (crypt-encode-region)
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155 ;;; (crypt-encrypted-mode)
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156 ;;; (crypt-encrypt-region)
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157 ;;; (crypt-set-encryption-key)
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158 ;;; (crypt-rebuild-tables)
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159 ;;; (crypt-insert-file)
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160 ;;; (crypt-bind-insert-file)
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161 ;;; (crypt-submit-report)
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162 ;;;
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163 ;;; To find out more about these functions, load this file, put your cursor
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164 ;;; inside any of the `()' of the above lines, and hit C-h f [RET].
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165
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166
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167 ;;; NOTES ON INTERFACES WITH OTHER PROGRAMS AND PACKAGES:
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168 ;;;
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169 ;;; GZIP: the environment variable GZIP of gzip can cause an error if it
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170 ;;; contains `--verbose' because standard output messages will be appended to
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171 ;;; gzip'ed files. This corrupts the files. The cleanest solution is to pass
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172 ;;; the `--quiet' switch in `crypt-encoding-alist' to override this. use gzip
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173 ;;; version 1.0.4 or higher from prep.ai.mit.edu:/pub/gnu
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174 ;;;
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175 ;;; TAR-MODE: works properly with version 1.28 (or higher) with v19 emacs.
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176
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177
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178 ;;; DESCRIPTION:
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179 ;;;
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180 ;;; The basic purpose of this package of Lisp functions is to recognize
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181 ;;; automatically encrypted and encoded (i.e., compressed) files when they are
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182 ;;; first visited or written. The BUFFER corresponding to the file is decoded
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183 ;;; and/or decrypted before it is presented to the user. The file itself is
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184 ;;; unchanged on the disk. When the buffer is subsequently saved to disk, a
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185 ;;; hook function re-encodes the buffer before the actual disk write takes
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186 ;;; place.
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187 ;;;
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188 ;;; This package recognizes all sorts of compressed files by a magic number at
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189 ;;; the beginning of these files but uses a heuristic to detect encrypted
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190 ;;; files. If you are asked for an encryption key for a file that is in fact
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191 ;;; not encrypted, just hit RET and the file will be accepted as is, and the
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192 ;;; crypt minor mode will not be entered.
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193 ;;;
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194 ;;; Other types of encoding programs may be added to this package by using the
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195 ;;; variable `crypt-encoding-alist' which contains a table of encoding
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196 ;;; programs such as compress, gzip (GNU zip), freeze, and compact.
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197 ;;;
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198 ;;; This new extended version of crypt now monitors the filename extensions of
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199 ;;; buffers that are written out using write-file (C-x C-w). If the filename
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200 ;;; extension matches one of the extensions listed in `crypt-encoding-alist,'
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201 ;;; then this package will write the file out using the corresponding encoding
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202 ;;; (compression) method. This is done whether or not the buffer originated
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203 ;;; from a previously encoded (compressed) file.
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204 ;;;
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205 ;;; Thus, if the user is editing a file that may or may not have been encoded
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206 ;;; originally (e.g., foobar.Z or foobar) and decides to write it to a
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207 ;;; different file (e.g., barfoo or barfoo.z or barfoo.C). This package will
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208 ;;; examine the filename extension and write the buffer in plain format or an
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209 ;;; alternate encoding (compression) format by searching through the entries
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210 ;;; in the table of encoding methods `crypt-encoding-alist.' This change in
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211 ;;; encoding state is done automatically if the variable
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212 ;;; `crypt-auto-write-buffer' is t otherwise the user is asked.
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213
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214
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215 ;;; TO DO/KNOWN BUGS/HELP WANTED/APPLY WITHIN:
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216 ;;;
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217 ;;; All Users/hackers out there are strongly encouraged to pursue any of these
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218 ;;; matters further (especially those that concern encryption and decryption!).
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219 ;;; It is important to future programmers and modifiers of crypt++.el to know
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220 ;;; about its perceived limitations. Since necessity drives invention, users
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221 ;;; who find any of the following features of crypt++.el annoying are asked to
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222 ;;; make suggestions and send patches (again, especially those that concern
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223 ;;; encryption and decryption!).
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224 ;;;
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225 ;;; * currently crypt++ assumes that if a file is both encrypted and encoded
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226 ;;; (i.e., compressed) that the order in which it was done was encryption
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227 ;;; first _then_ compression. As has been pointed by many people compression
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228 ;;; following encryption is useless since the encrypted file is basically
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229 ;;; random. On the other hand, many agree that doing encryption _following_
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230 ;;; compression is better since it makes it harder to crack the encryption.
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231 ;;; We would like to make the ordering of these two user-configurable or if
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232 ;;; nothing else change the order.
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233 ;;;
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234 ;;; Having read the above however, Francois Pinard <pinard@iro.umontreal.ca>
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235 ;;; writes that encryption following compression may not be harder to crack
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236 ;;; since "the fact that the first few uncrypted bytes are expected (the
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237 ;;; compress signature) facilitates a serious attempt at uncrypting."
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238 ;;; jwz agrees with Francois.
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239 ;;;
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240 ;;; * get write-region and append-to-file to handle encoded and encrypted
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241 ;;; files. There is an interesting low-level encoding package by Jay Adams
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242 ;;; <jka@ece.cmu.edu> called jka-compr.el that might address some of these
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243 ;;; issues. We encourage hackers out there to come up with crypt++ versions
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244 ;;; of write-region and append-to-file. The difficulty is creating versions
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245 ;;; that mimic the originals as closely as possible.
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246 ;;;
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247 ;;; * instead of using call-process-region (which can fail badly if the region
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248 ;;; is large and there's not much room in /tmp), write the region to a temp
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249 ;;; file (with a customisable location) and use call-process directly.
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250 ;;;
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251 ;;; * users have mentioned trouble using crypt++ and hilit simultaneously since
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252 ;;; the functions in write-file-hook for both write the file to disk and
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253 ;;; return t. A possible solution is to have one of them write to a
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254 ;;; scratch buffer instead of to disk and return nil and then allow the
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255 ;;; other to do its work on the scratch buffer and write it to disk. Thanks
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256 ;;; to Wayne Folta <folta@cs.UMD.EDU> and Amir J Katz <amir@matis.ingr.com>.
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257 ;;; It would be nice to have another way in emacs to have an
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258 ;;; after-write-file-hook and a before-write-file-hook of some sort.
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259 ;;; Lucid Emacs has an after-write-file-hook. Recent versions of hilit19.el
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260 ;;; do not automatically attach to `write-file-hooks' and return t.
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261 ;;; However, the general problem of multiple packages returning t still
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262 ;;; remains. dos-mode.el and crypt.el also conflict.
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263 ;;;
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264 ;;; * another possible source of trouble is with encryption (and encoding)
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265 ;;; programs sticking verbose output into buffers prior to being written to
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266 ;;; disk. This was definitely occurring with gzip because of --verbose in
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267 ;;; the GZIP environment variable and is solved/hidden with the --quiet
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268 ;;; switch. However, I suspect that some encryption problems out there are
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269 ;;; capable of similar things so the user should be careful.
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270 ;;;
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271 ;;; * integrating crypt++ with a backgrounding package such as Olin Shivers'
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272 ;;; `background.el' might be useful too. thanks to Mark Borges
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273 ;;; <mdb@noaacrd.Colorado.EDU> for suggesting this.
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274 ;;;
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275 ;;; * Performing M-x crypt-encode-buffer or M-x crypt-encrypt-buffer and then
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276 ;;; saving the file would possibly cause errors. It is better to toggle
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277 ;;; `crypt-encoded-mode' (or `crypt-encrypted-mode') and simply save the
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278 ;;; file. It is for this reason that `crypt-encode-buffer' and
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279 ;;; `crypt-encrypt-buffer' are not interactive.
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280 ;;;
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281 ;;; * use plists instead of alists replacing calls to `nth' with `get'
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282 ;;;
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283 ;;; * merge encryption code completely into encoding code making encryption
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284 ;;; just a special case of encoding.
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285
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286
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287 ;;; Change log:
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288 ;;;
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289 ;;; 1.1 - original version of crypt.el
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290 ;;; 1.2 -
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291 ;;; jwz: works with tar-mode.el
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292 ;;; jwz: applied patch from piet, merged with Lawrence Dodd's gzip version
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293 ;;; 1.3 -
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294 ;;; lrd: fixed compress-magic-regexp
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295 ;;; 1.4, 1.5, 1.6 -
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296 ;;; lrd: write-file compresses or gzips based on file extension
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297 ;;; 2.1 -
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298 ;;; lrd: merged with Rod Whitby's table-driven version (major upgrade)
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299 ;;; 2.2 -
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300 ;;; rjw: Changed file name to crypt++.el, so archie and lispdir can find it.
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301 ;;; 2.3 -
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302 ;;; rjw: Separated the hook additions and minor mode alist additions.
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303 ;;; 2.4 -
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304 ;;; rjw: Fixed the interactive form for crypt-buffer.
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305 ;;; 2.5 -
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306 ;;; lrd: doc mods, changed GNU free software notice (was out of date), added
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307 ;;; anonymous ftp information
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308 ;;; 2.6 -
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309 ;;; lrd: added back in definition of `buffer' in defun crypt-buffer caused
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310 ;;; an error when trying to read encrypted file; modified check for minor
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311 ;;; mode alist addition; added gzip magic number warning
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312 ;;; 2.7 - [posted to gnu.emacs.sources]
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313 ;;; lrd: added `TO DO' and `KNOW BUGS' section to header
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314 ;;; 2.8 -
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315 ;;; lrd: added note about updating to v 1.24 of tar-mode.el
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316 ;;; Thanks to Mark Borges <mdb@noaacrd.Colorado.EDU>
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317 ;;; 2.9 -
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318 ;;; lrd: moved query about `crypt-freeze-vs-fortran' out of defvar for
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319 ;;; `crypt-encoding-alist,' an erroneous value of nil was being stuck into
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320 ;;; alist when user set `crypt-freeze-vs-fortran' was nil, doc mod.
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321 ;;; Thanks to Mark Borges <mdb@noaacrd.Colorado.EDU>
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322 ;;; 2.10 -
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323 ;;; rjw: moved query about `crypt-freeze-vs-fortran' back into defvar for
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324 ;;; `crypt-encoding-alist,' - used append to ignore the erroneous nil.
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325 ;;; 2.11 -
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326 ;;; rjw: fixed a bug in my fix :-(
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327 ;;; 2.12 -
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328 ;;; rjw: Defvar crypt-magic-regexp and crypt-magic-regexp-inverse and
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329 ;;; allow either a regexp or an elisp expression.
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330 ;;; Suggested by Franc,ois Pinard <pinard@iro.umontreal.ca>.
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331 ;;; 2.13 -
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332 ;;; lrd: added in info on lispdir.el, doc mods and some puttering while
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333 ;;; looking over rjw's v 2.12 mods.
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334 ;;; 2.14 -
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335 ;;; lrd: doc mod - trivial huh? switched `compact' and `gzip' in
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336 ;;; `crypt-encoding-alist' - want gzip near top
|
|
|
337 ;;; 2.15 -
|
|
|
338 ;;; lrd: added in LCD Archive Entry and modified comments on tar-mode.el
|
|
|
339 ;;; since the version at the elisp-archive now works with crypt++.el
|
|
|
340 ;;; 2.16 -
|
|
|
341 ;;; lrd: provide `crypt' as well as `crypt++' allowing something like `ln -s
|
|
|
342 ;;; crypt++.el crypt.el' to be meaningful
|
|
|
343 ;;; Suggested (by|as) Per Abrahamsen <amanda@iesd.auc.dk>
|
|
|
344 ;;; 2.17 -
|
|
|
345 ;;; lrd: clarified bug report procedure, added fancy pseudo-graphics, added
|
|
|
346 ;;; to the `TO DO' list, put RCS tags in LCD Archive entry
|
|
|
347 ;;; 2.18 - [posted to gnu.emacs.sources]
|
|
|
348 ;;; lrd: included pointer to elisp archive in crypt-version description,
|
|
|
349 ;;; changed "Decode buffer %s? " to "Decode %s? " in crypt-find-file-hook
|
|
|
350 ;;; to be more general (mainly for crypt-insert-file)
|
|
|
351 ;;; 2.19 -
|
|
|
352 ;;; rjw: Added the crypt-compact-vs-C++ switch to distinguish compacted and
|
|
|
353 ;;; C++ files.
|
|
|
354 ;;; 2.20 -
|
|
|
355 ;;; lrd: (1) modified interactive form of crypt-buffer. (2) made search
|
|
|
356 ;;; case-insensitive in crypt-submit-report. (3) modified encoded-mode and
|
|
|
357 ;;; crypt-mode so that buffer-modified is not unconditionally set to nil
|
|
|
358 ;;; when the mode is not changed. Thanks to Gerd Hillebrand
|
|
|
359 ;;; <ggh@cs.brown.edu> for suggesting (2) and (3).
|
|
|
360 ;;; 2.21 -
|
|
|
361 ;;; rjw: Added an entry to the TODO list about the hazards of using
|
|
|
362 ;;; call-process-region on a large region and not much room in /tmp
|
|
|
363 ;;; (David Carlisle <carlisle@computer-science.manchester.ac.uk>).
|
|
|
364 ;;; 2.22 -
|
|
|
365 ;;; lrd: allow write-file-hooks to contain functions as well as lists.
|
|
|
366 ;;; Contributed by Ken Laprade <laprade@trantor.harris-atd.com>.
|
|
|
367 ;;; 2.23 -
|
|
|
368 ;;; lrd: made crypt-submit-report list values of more user-defined variables
|
|
|
369 ;;; 2.24 -
|
|
|
370 ;;; lrd: pass the -q switch to gzip to thwart the possibility of a --verbose
|
|
|
371 ;;; in the GZIP environment variable
|
|
|
372 ;;; 2.25 -
|
|
|
373 ;;; lrd: added some more to the TO DO list, clarified some things, also
|
|
|
374 ;;; untabified the entire file (I got tired of the control I's)
|
|
|
375 ;;; 2.26 -
|
|
|
376 ;;; lrd: use the long-named options for GNU zip (self-documenting)
|
|
|
377 ;;; 2.27 -
|
|
|
378 ;;; lrd: included observation by Francois Pinard <pinard@iro.umontreal.ca>
|
|
|
379 ;;; and worked on text in TO DO/KNOWN BUGS list
|
|
|
380 ;;; 2.28 -
|
|
|
381 ;;; lrd: added two new variables in (crypt-submit-report) to the list stuck
|
|
|
382 ;;; at the bottom of the mail message; changed the comments regarding the
|
|
|
383 ;;; user-defined variables. added in default values in user defined
|
|
|
384 ;;; variables. added to and removed stuff to the `TO DO' list.
|
|
|
385 ;;;
|
|
|
386 ;;; (encoded-mode):
|
|
|
387 ;;; added in code to remove any auto-save-files that may have been formed
|
|
|
388 ;;; before becoming an encoded buffer (for example a plain file saved to
|
|
|
389 ;;; disk encoded had orphan auto-save-files left behind). turning off
|
|
|
390 ;;; auto-save-mode disables the creation of auto-save-files, but it also
|
|
|
391 ;;; disables the possibility of these being removed when the buffer is
|
|
|
392 ;;; saved.
|
|
|
393 ;;;
|
|
|
394 ;;; (crypt-region):
|
|
|
395 ;;; now call the encryption and decryption program directly instead of
|
|
|
396 ;;; through the shell. this is more secure since the shell will expose the
|
|
|
397 ;;; password (key). thanks to Jon Cargille <jcargill@cs.wisc.edu>. defined
|
|
|
398 ;;; two new variables `crypt-decryption-args' and `crypt-encryption-args' to
|
|
|
399 ;;; take the arguments separately. removed (let ((opoint)...)) construct
|
|
|
400 ;;; this was a throw back to some old dead code and was not being used.
|
|
|
401 ;;; 2.29 -
|
|
|
402 ;;; lrd: added three new variables in (crypt-submit-report); added to the
|
|
|
403 ;;; `TO DO' list.
|
|
|
404 ;;;
|
|
|
405 ;;; (encode-region,encode-buffer,encoded-mode): fixed interactive forms -
|
|
|
406 ;;; the conversion to table version had eliminated some of the interactive
|
|
|
407 ;;; features of these. thanks to Kimball Collins <kpc@ptolemy.arc.nasa.gov>
|
|
|
408 ;;; for point this out. new interactive form uses functions
|
|
|
409 ;;; `crypt-get-encoding-type' and `crypt-symbol-alist-to-table' and variable
|
|
|
410 ;;; `crypt-default-encoding' to generate completion list of encoding types.
|
|
|
411 ;;;
|
|
|
412 ;;; (crypt-write-file-hook): two new user-defined variables
|
|
|
413 ;;; `crypt-query-if-interactive' and `crypt-no-extension-implies-plain' and
|
|
|
414 ;;; the buffer-local variable `buffer-interactive-mode' are used to help
|
|
|
415 ;;; determined whether or not plain output is really desired for files
|
|
|
416 ;;; without a compression file-name extension. the default behavior is the
|
|
|
417 ;;; same as before.
|
|
|
418 ;;; 2.30 -
|
|
|
419 ;;; lrd: added test for user-defined variable `crypt-never-ever-decrypt'
|
|
|
420 ;;; when finding a file. some users may never wish to decrypt files
|
|
|
421 ;;; and like to edit binary files. thanks to Nelson Minar
|
|
|
422 ;;; <nelson@reed.edu>. added to doc-strings of
|
|
|
423 ;;; `crypt-magic-regexp[-inverse]' -- these can be set to nil[t] and
|
|
|
424 ;;; accomplish the same thing as setting `crypt-never-ever-decrypt' to t
|
|
|
425 ;;; 2.31 -
|
|
|
426 ;;; rjw: Updated the comments in the encryption check section.
|
|
|
427 ;;; 2.32 - [posted to gnu.emacs.sources]
|
|
|
428 ;;; lrd: added warning about `crypt-(de|en)cryption-program'; doc mod.
|
|
|
429 ;;; 2.33 -
|
|
|
430 ;;; lrd: if `crypt-(de|en)cryption-args' are nil then don't pass any
|
|
|
431 ;;; arguments to (de|en)cryption program, nil is the default instead of
|
|
|
432 ;;; "". Thanks to Joe Ilacqua <spike@world.std.com>, David J. Schur
|
|
|
433 ;;; <djs@idm.com>, Peter Nuth <nuth@ai.mit.edu>, and Greg Larson
|
|
|
434 ;;; <glarson@bnr.ca>. `-q' exists in gzip 1.0.3 but not `--quiet' changed
|
|
|
435 ;;; GZIP NOTE. Thanks to Chris Moore <moore@src.bae.co.uk>.
|
|
|
436 ;;; 2.34 -
|
|
|
437 ;;; lrd: allow `crypt-(de|en)cryption-args' to be a list of strings -- more
|
|
|
438 ;;; robust. query for password (key), if none is set, when writing out file
|
|
|
439 ;;; for which `buffer-save-encrypted' is t. Thanks to John Interrante
|
|
|
440 ;;; <interran@uluru.Stanford.EDU>. (crypt-write-file-hook): check filename
|
|
|
441 ;;; extension against regexp `crypt-encryption-file-extension' and query for
|
|
|
442 ;;; encryption, unless `crypt-auto-write-buffer-encrypted' is t (don't
|
|
|
443 ;;; bother doing reverse check, encrypted to plain, not a common request).
|
|
|
444 ;;; (crypt-mode): delete auto-save files (cf., encoded-mode), may exist now.
|
|
|
445 ;;; (read-string-no-echo): applied patch from Piet van Oostrum
|
|
|
446 ;;; <piet@cs.ruu.nl> -- set `cursor-in-echo-area' _after_ setting buffer
|
|
|
447 ;;; (this was screwing up gnews).
|
|
|
448 ;;; 2.35 -
|
|
|
449 ;;; lrd: doc mod
|
|
|
450 ;;; 2.36 -
|
|
|
451 ;;; lrd: fixed typo, added RMAIL note.
|
|
|
452 ;;; 2.37 - [posted to gnu.emacs.sources]
|
|
|
453 ;;; lrd:
|
|
|
454 ;;; (crypt-write-file-hook): search user-defined list
|
|
|
455 ;;; `crypt-ignored-filenames' for possible match with `buffer-filename'
|
|
|
456 ;;; before attempting conversion from compressed to plain format; useful for
|
|
|
457 ;;; compressed incoming mail files (e.g., RMAIL, INBOX).
|
|
|
458 ;;;
|
|
|
459 ;;; (crypt-mode): query for key if not set already; need to switch order of
|
|
|
460 ;;; recovering key and toggling crypt-mode in crypt-find-file-hook (thanks
|
|
|
461 ;;; to Piet van Oostrum <piet@cs.ruu.nl>).
|
|
|
462 ;;;
|
|
|
463 ;;; (crypt-buffer) and (encode-buffer): remove interactive form; use
|
|
|
464 ;;; (crypt-mode) and (encoded-mode) instead so encryption and compression
|
|
|
465 ;;; are done at the very end; leave interactive form in (crypt-region) and
|
|
|
466 ;;; (encode-region) may still be used.
|
|
|
467 ;;;
|
|
|
468 ;;; (set-encryption-key): remove from `command-history' if called
|
|
|
469 ;;; interactively - thanks to George M. Georgiou
|
|
|
470 ;;; <georgiou@silicon.csci.csusb.edu>.
|
|
|
471 ;;; 2.38 -
|
|
|
472 ;;; lrd: added `crypt-' prefix to `(read-string-no-echo)' and `(save-point)'
|
|
|
473 ;;; changed file extension for gzip files to `.z' _or_ `.gz' (future release
|
|
|
474 ;;; of gzip with use later extension by default and so this should be
|
|
|
475 ;;; changed to just `.gz' someday).
|
|
|
476 ;;; 2.39 -
|
|
|
477 ;;; lrd: doc mod. added in patch from jwz - `(crypt-read-string-no-echo)' is
|
|
|
478 ;;; more secure, put property 'permanent-local on buffer-locals works for
|
|
|
479 ;;; Lucid Emacs and doesn't harm v18 emacs, change `buffer-interactive-mode'
|
|
|
480 ;;; to `buffer-interactive-encoded-mode.'
|
|
|
481 ;;; 2.40 -
|
|
|
482 ;;; lrd: put property 'preserved in case kill-fix.el is being used.
|
|
|
483 ;;; 2.41 -
|
|
|
484 ;;; lrd: all functions and variables now start with `crypt-', moved REVISION
|
|
|
485 ;;; HISTORY to bottom of header, interactive version of
|
|
|
486 ;;; `(crypt-encrypt-region)' clearer, `(crypt-read-string-no-echo)' now
|
|
|
487 ;;; echos `.'
|
|
|
488 ;;; 2.42 -
|
|
|
489 ;;; lrd: (crypt-check-extension-for-encoding): broke out of
|
|
|
490 ;;; `(crypt-write-file-hook)'. setting user variables
|
|
|
491 ;;; `crypt-compact-vs-C++' and `crypt-freeze-vs-fortran' to nil no longer
|
|
|
492 ;;; completely disables the reading compact'ed and frozen files but just
|
|
|
493 ;;; disables the use of the file-extension tricks of
|
|
|
494 ;;; `(crypt-check-extension-for-encoding).' (crypt-encode-region): allow
|
|
|
495 ;;; for a single line message from encoding program at top of region; if it
|
|
|
496 ;;; is there, then remove it; kludge for `compact' program.
|
|
|
497 ;;; 2.43 -
|
|
|
498 ;;; lrd: (crypt-encode-region): generalize the clean up procedure; add
|
|
|
499 ;;; element to `crypt-encoding-alist' and introduce new function
|
|
|
500 ;;; `(crypt-encoding-cleanup-regexp)' to extract a compression specific
|
|
|
501 ;;; regexp for erroneous message or lisp expression for cleanup.
|
|
|
502 ;;; 2.44 -
|
|
|
503 ;;; lrd: new element for `crypt-encoding-alist' handles whether or not
|
|
|
504 ;;; file-name extension tricks may be play with encoding method; compact and
|
|
|
505 ;;; freeze values default to `crypt-compact-vs-C++' and
|
|
|
506 ;;; `crypt-freeze-vs-fortran' (thanks to rjw);
|
|
|
507 ;;; (crypt-encoding-extension-tricks): new defun to handle this;
|
|
|
508 ;;; (crypt-check-extension-for-encoding): monitors "tricks" entry of
|
|
|
509 ;;; `crypt-encoding-alist' and adjust the bag of tricks it can apply.
|
|
|
510 ;;; 2.45 -
|
|
|
511 ;;; lrd: (crypt-encode-region): delete entire match of cleanup regexp by
|
|
|
512 ;;; requiring newlines in GARBAGE-REGEXP-OR-LISPEXP. (crypt-submit-report):
|
|
|
513 ;;; use Warsaw's reporter.el.
|
|
|
514 ;;; 2.46 -
|
|
|
515 ;;; lrd: (crypt-find-file-hook, crypt-write-file-hook): cleaned, documented,
|
|
|
516 ;;; and replaced occurrences of `(cond (C BODY))' with `(if C BODY)';
|
|
|
517 ;;; changed `crypt-magic-regexp' to `crypt-encryption-magic-regexp' and
|
|
|
518 ;;; `crypt-magic-regexp-inverse' to `crypt-encryption-magic-regexp-inverse'
|
|
|
519 ;;; for consistency with other variable names. new user-defined variable
|
|
|
520 ;;; `crypt-encryption-minor-mode-name' instead of always "Crypt". grouped
|
|
|
521 ;;; all encryption variables together.
|
|
|
522 ;;; 2.47 -
|
|
|
523 ;;; lrd: somewhat major change - put program-specific encryption variables
|
|
|
524 ;;; into a single table `crypt-encryption-alist' and let the variable
|
|
|
525 ;;; `crypt-encryption-type' define the appropriate entry to use; new
|
|
|
526 ;;; user-defined variable `crypt-confirm-password,' thanks to Jeff Clark
|
|
|
527 ;;; <jclark@src.honeywell.com>. (crypt-submit-report): improved error
|
|
|
528 ;;; handling, thanks to baw. (crypt-write-file-hook): fixed bug with
|
|
|
529 ;;; `crypt-encoding-extension-tricks'
|
|
|
530 ;;; 2.48 -
|
|
|
531 ;;; lrd: added dummy argument to `crypt-encoding-alist' and
|
|
|
532 ;;; `crypt-encryption-alist' and merged all defuns that work on their
|
|
|
533 ;;; elements into defuns that all start with `crypt-get-' and look through
|
|
|
534 ;;; both lists. simplifies some of code and closer to treating encryption
|
|
|
535 ;;; as a special case of encoding; crypt-minor-mode-alist: replaced (nth *)
|
|
|
536 ;;; with `(crypt-get-minor-mode)' call; (crypt-encode-region): allow
|
|
|
537 ;;; arguments to be list of strings; renamed (crypt-get-encoding-type) to
|
|
|
538 ;;; (crypt-read-encoding-type) for clarity.
|
|
|
539 ;;; 2.49 - [posted to gnu.emacs.sources]
|
|
|
540 ;;; lrd: (crypt-encode-region): ignore `args' if set to t
|
|
|
541 ;;; 2.50 -
|
|
|
542 ;;; lrd: (crypt-write-file-hook): in v19 we need to call `backup-buffer'
|
|
|
543 ;;; ourselves -- we write out the file and return t so `basic-save-buffer'
|
|
|
544 ;;; does not do it; also call `set-file-modes'
|
|
|
545 ;;; 2.51 -
|
|
|
546 ;;; lrd: some `defvar's are now `defconst's and tar-mode note was changed.
|
|
|
547 ;;; 2.52 -
|
|
|
548 ;;; lrd: make doc strings conform to GNU standards.
|
|
|
549 ;;; 2.53 -
|
|
|
550 ;;; lrd: made header conform to GNU Conventional Headers standard.
|
|
|
551 ;;; 2.54 -
|
|
|
552 ;;; lrd: `crypt-encryption-file-extension', `crypt-freeze-vs-fortran',
|
|
|
553 ;;; `crypt-compact-vs-C++', `crypt-encryption-magic-regexp', and
|
|
|
554 ;;; `crypt-encryption-magic-regexp-inverse' are used in defining the tables
|
|
|
555 ;;; `crypt-encoding-alist' and `crypt-encryption-alist' and so need to be set
|
|
|
556 ;;; _before_ loading crypt++. use `add-hook' if it is available.
|
|
|
557 ;;; 2.55 -
|
|
|
558 ;;; lrd: new interactive function `crypt-insert-file' mimics `insert-file'
|
|
|
559 ;;; but attempts to decode or decrypt before insertion; bound `C-x i' if
|
|
|
560 ;;; `crypt-bind-insert-file' is non-nil. comment out doc-strings from
|
|
|
561 ;;; internal subroutines, saves space.
|
|
|
562 ;;; 2.56 -
|
|
|
563 ;;; tfb: change the definitions of crypt-{encoding,encryption}-alist, to
|
|
|
564 ;;; call the functions crypt-make-{encoding,encryption}-alist resp.
|
|
|
565 ;;; Added crypt-reinit which regenerates these variables from their
|
|
|
566 ;;; functions, thus allowing this stuff to be preloaded even if people
|
|
|
567 ;;; set things in their init files.
|
|
|
568 ;;; Tim Bradshaw <tim.bradshaw@mid-heidelberg.de>
|
|
|
569 ;;; 2.57 -
|
|
|
570 ;;; lrd: untabify; remove duplicate entry in `crypt-make-encoding-alist';
|
|
|
571 ;;; change name of `crypt-make-*-alist' to `crypt-build-*-alist' and
|
|
|
572 ;;; `crypt-reinit' to `crypt-rebuild-tables'; (crypt-read-string-no-echo):
|
|
|
573 ;;; change local variable `form' to `help-form' so it is defined;
|
|
|
574 ;;; `crypt-encryption-alist' and `crypt-encoding-alist' must be defined with
|
|
|
575 ;;; `defconst' since we wish crypt++ to initialize these variables
|
|
|
576 ;;; unconditionally; modify INSTALLATION section to reflect these changes.
|
|
|
577 ;;; 2.58 -
|
|
|
578 ;;; lrd: doc mod.
|
|
|
579 ;;; 2.59 - [posted to gnu.emacs.sources]
|
|
|
580 ;;; lrd: (crypt-bind-insert-file): new function for changing "C-x i" in
|
|
|
581 ;;; initialization file or interactively.
|
|
|
582 ;;; 2.60 -
|
|
|
583 ;;; lrd: add `crypt-rebuild-tables' and `crypt-bind-insert-file' to
|
|
|
584 ;;; `after-init-hook' in GNU emacs v19 and to `term-setup-hook' in Lucid
|
|
|
585 ;;; emacs. Change INSTALLATION notes.
|
|
|
586 ;;; 2.61 - [posted to gnu.emacs.sources]
|
|
|
587 ;;; lrd: Doc mod. Clean up the installation of minor mode indicators.
|
|
|
588 ;;; 2.62 - [posted to gnu.emacs.sources]
|
|
|
589 ;;; lrd: installed patch from stig@hackvan.com to simplify crypt-get-* defuns
|
|
|
590 ;;; (now defmacros). Don't add to `term-setup-hook' unless no
|
|
|
591 ;;; `after-init-hook' _and_ definitely running v19, otherwise Rod gets an
|
|
|
592 ;;; error at home :-<. Don't assume C-x i had `insert-file' bound to it:
|
|
|
593 ;;; store old binding in `crypt-old-binding' before overwriting and use in
|
|
|
594 ;;; function `crypt-bind-insert-file.'
|
|
|
595 ;;; 2.63 -
|
|
|
596 ;;; lrd: (crypt-encode-buffer, crypt-encode-region, crypt-encrypt-buffer,
|
|
|
597 ;;; crypt-encrypt-region): changed argument list putting optional buffer
|
|
|
598 ;;; last and making default action to encode or encrypt. (crypt-encoded-p,
|
|
|
599 ;;; crypt-encrypted-p): new functions that do the actual testing of file
|
|
|
600 ;;; contents. (crypt-find-file): uses these new functions.
|
|
|
601 ;;; (crypt-rebuild-minor-modes-alist): new function to rebuild
|
|
|
602 ;;; `minor-mode-alist' called by function crypt-rebuild-tables.
|
|
|
603 ;;; (crypt-build-minor-mode-alist): new function called by
|
|
|
604 ;;; `crypt-minor-mode-alist' to create itself. `crypt-minor-mode-encrypted'
|
|
|
605 ;;; removed because defined in function crypt-build-minor-mode-alist.
|
|
|
606 ;;; 2.64 -
|
|
|
607 ;;; lrd: (crypt-find-file-hook): temporarily remove the encrytion file
|
|
|
608 ;;; extension to help determine the major mode, just like is done with the
|
|
|
609 ;;; encoding file extension. In order for this to work properly the file
|
|
|
610 ;;; extension in `crypt-encryption-file-extension' and
|
|
|
611 ;;; `crypt-encryption-alist' needs to be inside a pair of \\( \\).
|
|
|
612 ;;; 2.65 -
|
|
|
613 ;;; lrd: (crypt-find-file-hook): move determination of key, password, into
|
|
|
614 ;;; (crypt-encrypted-p).
|
|
|
615 ;;; 2.66 -
|
|
|
616 ;;; lrd: (crypt-set-encryption-key): improve prompt string for encryption
|
|
|
617 ;;; key.
|
|
|
618 ;;; 2.67 -
|
|
|
619 ;;; lrd: (crypt-write-file-hook): make check for encryption file-name
|
|
|
620 ;;; extension case-sensitive.
|
|
|
621 ;;; 2.68 -
|
|
|
622 ;;; lrd: fixed check for previous addition to `minor-mode-alist' -- was not
|
|
|
623 ;;; working. Check for an `add-hook' function; if one does not exist then
|
|
|
624 ;;; use a copy of one from GNU Emacs 19. When using `add-hook' to append to
|
|
|
625 ;;; the `write-file-hooks' make sure that the version accepts the optional
|
|
|
626 ;;; APPEND argument -- v19's does but the one in the elisp archive by Dan
|
|
|
627 ;;; LaLiberte <liberte@cs.uiuc.edu> does not append. This causes problems.
|
|
|
628 ;;; Thanks to Francesco Potorti` <pot@fly.CNUCE.CNR.IT> for pointing this
|
|
|
629 ;;; out.
|
|
|
630 ;;; 2.69 - [posted to gnu.emacs.sources]
|
|
|
631 ;;; lrd: doc mod with regards `after-init-hook' and Lucid Emacs. Add
|
|
|
632 ;;; pointer to crypt++-fnf.el for people who might be interested.
|
|
|
633 ;;; 2.70 -
|
|
|
634 ;;; lrd: narrow conditions under which crypt-encryption-magic-regexp
|
|
|
635 ;;; matches. Thanks to Philippe Michel <michel@thomson-lcr.fr> and Francois
|
|
|
636 ;;; Pinard <pinard@iro.umontreal.ca> for helping explain this with regards
|
|
|
637 ;;; to ISO/Latin-1.
|
|
|
638 ;;; 2.71 -
|
|
|
639 ;;; lrd: applied patches from Darrin Jewell <jewell@bdi.com> for DOS to UNIX
|
|
|
640 ;;; support. DOS entry added to crypt-build-encoding-alist.
|
|
|
641 ;;; (crypt-dos-to-unix-region, crypt-unix-to-dos-region): New
|
|
|
642 ;;; functions. (crypt-dos-has-ctrl-z): New buffer-local variable.
|
|
|
643 ;;; (crypt-encode-region): allow for encoding and decoding programs to be
|
|
|
644 ;;; elisp expressions. If they are then apply them directly to region.
|
|
|
645 ;;; Point out that crypt++.el conflicts with dos-mode.el.
|
|
|
646 ;;; 2.72 -
|
|
|
647 ;;; lrd: The limit for the regular expression search done by
|
|
|
648 ;;; `crypt-encrypted-p' is extended to 100 by default. The enlargement of
|
|
|
649 ;;; search field is needed because of previous reduction in size of regexp
|
|
|
650 ;;; being searched for. (crypt-magic-search-limit): New variable defining
|
|
|
651 ;;; this new limit. (crypt-encrypted-p): Uses it and cleaned up. Doc mod.
|
|
|
652 ;;; Thanks to Philippe Michel <michel@thomson-lcr.fr>, Francois Pinard
|
|
|
653 ;;; <pinard@iro.umontreal.ca>, and Dave Goldberg <dsg@blackbird.mitre.org>.
|
|
|
654 ;;; 2.73 - [posted to gnu.emacs.sources]
|
|
|
655 ;;; lrd: Apply patch from Kevin Rodgers <kevin@traffic.den.mmc.com> that
|
|
|
656 ;;; uses more verbose messages and capitals. Doc mod.
|
|
|
657 ;;; 2.74 -
|
|
|
658 ;;; lrd: Untabify. (crypt-encrypted-p): Check value of
|
|
|
659 ;;; `crypt-never-ever-decrypt' before anything else.
|
|
|
660 ;;; 2.75 -
|
|
|
661 ;;; lrd: (crypt-version): Remove call to `substring'.
|
|
|
662 ;;; 2.76 -
|
|
|
663 ;;; lrd: (crypt-encryption-magic-regexp-inverse): Add in regexp that will
|
|
|
664 ;;; match ksh `.sh_history' files so that they are not interpreted as
|
|
|
665 ;;; encrypted files. Thanks to Francesco Potorti` <pot@fly.CNUCE.CNR.IT>.
|
|
|
666 ;;; 2.77 - [posted to gnu.emacs.sources]
|
|
|
667 ;;; lrd: (crypt-bind-insert-file): Use substitute-key-definition to bind
|
|
|
668 ;;; crypt-insert-file to whatever key insert-file is bound to (not
|
|
|
669 ;;; necessarily C-x i). Call crypt-bind-insert-file directly in
|
|
|
670 ;;; file. Variable crypt-bind-insert-file: Doc mod. Remove
|
|
|
671 ;;; crypt-old-binding. Replace `M-x foobar' in doc strings with
|
|
|
672 ;;; `\\[foobar]'.
|
|
|
673 ;;; 2.78 -
|
|
|
674 ;;; lrd: (crypt-auto-write-answer-local): New internal variable. Holds
|
|
|
675 ;;; answer to query about file-extension tricks question per buffer. Thanks
|
|
|
676 ;;; to George Forman <forman@cs.washington.edu>. Remove Rod from list of
|
|
|
677 ;;; maintainers...he's busy enough. Merge multiple setq forms into single
|
|
|
678 ;;; setq forms.
|
|
|
679 ;;; 2.79 -
|
|
|
680 ;;; lrd: (crypt-y-or-n-p): New internal function for querying. Tests the
|
|
|
681 ;;; internal variable crypt-auto-write-answer-local to ensure single query.
|
|
|
682 ;;; (crypt-check-extension-for-encoding): Replace all occurrences of queries
|
|
|
683 ;;; involving y-or-no-p constructs with crypt-y-or-n-p.
|
|
|
684 ;;; 2.80 - [posted to gnu.emacs.sources]
|
|
|
685 ;;; lrd: (crypt-set-encryption-key): Shorten interactive prompt. Change
|
|
|
686 ;;; documentation.
|
|
|
687 ;;; 2.81 -
|
|
|
688 ;;; lrd: (crypt-variable-list): Add shell and path variables.
|
|
|
689 ;;; (crypt-confirm-password): Fix spelling error in doc.
|
|
|
690 ;;; 2.82 -
|
|
|
691 ;;; lrd: Applied patch from Noah Friedman <friedman@prep.ai.mit.edu>.
|
|
|
692 ;;; (crypt-encoded-disable-auto-save, crypt-encrypted-disable-auto-save):
|
|
|
693 ;;; New user-defined variables. (crypt-encoded-mode, crypt-encrypted-mode):
|
|
|
694 ;;; Use them.
|
|
120
|
695 ;;; 2.83 -
|
|
|
696 ;;; hniksic: Added custom.
|
|
0
|
697
|
|
|
698
|
|
|
699 ;;; Code:
|
|
|
700
|
|
|
701 ;;;; User definable variables.
|
|
|
702
|
|
120
|
703 (defgroup crypt nil
|
|
|
704 "Handling compressed and encrypted files."
|
|
|
705 :group 'data)
|
|
|
706
|
|
|
707 (defcustom crypt-encryption-type 'crypt
|
|
0
|
708 "*Method of encryption. Must be an element of `crypt-encryption-alist.'
|
|
120
|
709 If you change this after crypt++ is loaded then do \\[crypt-rebuild-tables]."
|
|
|
710 :type 'symbol
|
|
|
711 :group 'crypt)
|
|
0
|
712
|
|
120
|
713 (defcustom crypt-encryption-file-extension nil
|
|
0
|
714 "*Regexp for extension of files encrypted with `crypt-encryption-type.'
|
|
|
715 Should be of the form \"\\\\(\\\\.foo\\\\)$\". nil says use default values in
|
|
|
716 `crypt-encryption-alist.' If you change this after crypt++ is loaded then do
|
|
120
|
717 \\[crypt-rebuild-tables]."
|
|
|
718 :type 'regexp
|
|
|
719 :group 'crypt)
|
|
0
|
720
|
|
120
|
721 (defcustom crypt-never-ever-decrypt nil
|
|
|
722 "*t says never attempt to decrypt a buffer."
|
|
|
723 :type 'boolean
|
|
|
724 :group 'crypt)
|
|
0
|
725
|
|
120
|
726 (defcustom crypt-auto-write-buffer-encrypted nil
|
|
0
|
727 "*t says files with `crypt-encryption-alist' file extension auto-encrypted.
|
|
120
|
728 nil says query. See `crypt-auto-write-buffer.'"
|
|
|
729 :type 'boolean
|
|
|
730 :group 'crypt)
|
|
0
|
731
|
|
120
|
732 (defcustom crypt-confirm-password nil
|
|
|
733 "*t says confirm new passwords and when writing a newly encrypted buffer."
|
|
|
734 :type 'boolean
|
|
|
735 :group 'crypt)
|
|
0
|
736
|
|
120
|
737 (defcustom crypt-encoded-disable-auto-save t
|
|
0
|
738 "*If t, turn off auto-save-mode for buffers which are encoded.
|
|
|
739 If non-nil but not t, then no message is displayed.
|
|
|
740
|
|
|
741 The default is t is because there isn't any way to tell emacs to encode the
|
|
|
742 autosave file, so the autosave would be in a different format from the
|
|
|
743 original. The disadvantage of turning off autosaves is that any work you
|
|
|
744 do in that buffer will be completely lost if the changes are not explicitly
|
|
|
745 saved.
|
|
|
746
|
|
|
747 It is probably best to set this variable to nil and use buffer-local
|
|
|
748 variables in files for which you don't actually care about autosaves.
|
|
120
|
749 Unencoded recovery data is better than none at all."
|
|
|
750 :type '(choice (const :tag "on" t)
|
|
|
751 (const :tag "off" nil)
|
|
|
752 (const :tag "no message" other))
|
|
|
753 :group 'crypt)
|
|
0
|
754
|
|
120
|
755 (defcustom crypt-encrypted-disable-auto-save t
|
|
0
|
756 "*If t, turn off auto-save-mode for buffers which are encrypted.
|
|
|
757 If non-nil but not t, then no message is displayed.
|
|
|
758
|
|
|
759 The default is t is because there isn't any way to tell emacs to encrypt
|
|
|
760 the autosave file, so the autosave would be in cleartext form. The
|
|
|
761 disadvantage of turning off autosaves is that any work you do in that
|
|
|
762 buffer will be completely lost if the changes are not explicitly saved.
|
|
|
763
|
|
|
764 You might consider setting this variable to nil and use buffer-local
|
|
|
765 variables in files for which security is more important than data
|
|
120
|
766 recovery."
|
|
|
767 :type '(choice (const :tag "on" t)
|
|
|
768 (const :tag "off" nil)
|
|
|
769 (const :tag "no message" other))
|
|
|
770 :group 'crypt)
|
|
0
|
771
|
|
|
772 ;;; ENCRYPTION
|
|
|
773
|
|
|
774 ;;; Encrypted files have no magic number, so we have to hack a way of
|
|
|
775 ;;; determining when a buffer should be decrypted. we do this only buffers
|
|
|
776 ;;; that match a MAGIC-REGEXP very close to beginning of buffer and that do
|
|
|
777 ;;; _NOT_ match a MAGIC-REGEXP-INVERSE.
|
|
|
778 ;;;
|
|
|
779 ;;; Currently MAGIC-REGEXP matches non-ASCII characters and
|
|
|
780 ;;; MAGIC-REGEXP-INVERSE will match Sun OS, 4.x BSD, and Ultrix executable
|
|
|
781 ;;; magic numbers, so binaries can still be edited (heh) without headaches.
|
|
|
782
|
|
|
783 (defconst crypt-encryption-magic-regexp "[\000\200-\237]"
|
|
|
784 "Regexp that must be found very close to beginning of encrypted buffer.
|
|
|
785 This is intended to be an internal variable \(not user-visible\). If you
|
|
|
786 change this after crypt++ is loaded then do \\[crypt-rebuild-tables].")
|
|
|
787
|
|
|
788 (defconst crypt-encryption-magic-regexp-inverse
|
|
|
789 "\\`\201\001\\|^\\(..\\)?\\([\007\010\013]\001\\|\001[\007\010\013]\\)"
|
|
|
790 "Regexp that must *not* be found very close to beginning of encrypted buffer.
|
|
|
791 This is intended to be an internal variable \(not user-visible\). If you
|
|
|
792 change this after crypt++ is loaded then do \\[crypt-rebuild-tables].")
|
|
|
793
|
|
|
794 (defconst crypt-magic-search-limit 100
|
|
|
795 "Limit of regular expression search used to recognize encrypted files.
|
|
|
796 Maximum position in file for presence of `crypt-encryption-magic-regexp' and
|
|
|
797 absence of `crypt-encryption-magic-regexp-inverse'.")
|
|
|
798
|
|
|
799 (defun crypt-build-encryption-alist ()
|
|
|
800 ;; Returns the encryption alist
|
|
|
801 (list
|
|
|
802 ;; crypt
|
|
|
803 (list 'crypt
|
|
|
804 crypt-encryption-magic-regexp crypt-encryption-magic-regexp-inverse
|
|
|
805 (or crypt-encryption-file-extension "\\(\\.e\\)$")
|
|
|
806 "crypt" "crypt"
|
|
|
807 nil
|
|
|
808 nil
|
|
|
809 "Crypt"
|
|
|
810 nil
|
|
|
811 t
|
|
|
812 )
|
|
|
813 ;; DES (Cipher Block Chaining - CBC) [DES' default]
|
|
|
814 (list 'des
|
|
|
815 crypt-encryption-magic-regexp crypt-encryption-magic-regexp-inverse
|
|
|
816 (or crypt-encryption-file-extension "\\(\\.des\\)$")
|
|
|
817 "des" "des"
|
|
|
818 '("-e" "-k")
|
|
|
819 '("-d" "-k")
|
|
|
820 "DES-CBC"
|
|
|
821 nil
|
|
|
822 t
|
|
|
823 )
|
|
|
824 ;; DES (Electronic Code Book - ECB)
|
|
|
825 (list 'des-ecb
|
|
|
826 crypt-encryption-magic-regexp crypt-encryption-magic-regexp-inverse
|
|
|
827 (or crypt-encryption-file-extension "\\(\\.des\\)$")
|
|
|
828 "des" "des"
|
|
|
829 '("-e" "-b" "-k")
|
|
|
830 '("-d" "-b" "-k")
|
|
|
831 "DES-ECB"
|
|
|
832 nil
|
|
|
833 t
|
|
|
834 )
|
|
|
835 ;; PGP
|
|
|
836 (list 'pgp
|
|
|
837 crypt-encryption-magic-regexp crypt-encryption-magic-regexp-inverse
|
|
|
838 (or crypt-encryption-file-extension "\\(\\.pgp\\)$")
|
|
|
839 "pgp" "pgp"
|
|
|
840 '("+batchmode" "+verbose=0" "-c" "-f" "-z")
|
|
|
841 '("+batchmode" "+verbose=0" "-f" "-z")
|
|
|
842 "PGP"
|
|
|
843 nil
|
|
|
844 t
|
|
|
845 )
|
|
|
846 ;; Add new elements here ...
|
|
|
847 ))
|
|
|
848
|
|
|
849 (defconst crypt-encryption-alist (crypt-build-encryption-alist)
|
|
|
850 "List of elements describing the encryption methods available.
|
|
|
851 each element looks like
|
|
|
852
|
|
|
853 \(ENCRYPTION-TYPE
|
|
|
854 MAGIC-REGEXP MAGIC-REGEXP-INVERSE
|
|
|
855 FILE-EXTENSION
|
|
|
856 ENCRYPT-PROGRAM DECRYPT-PROGRAM
|
|
|
857 ENCRYPT-ARGS
|
|
|
858 DECRYPT-ARGS
|
|
|
859 MINOR-MODE
|
|
|
860 GARBAGE-REGEXP-OR-LISPEXP
|
|
|
861 FILE-EXTENSION-TRICKS
|
|
|
862 \)
|
|
|
863
|
|
|
864 ENCRYPTION-TYPE is a symbol denoting the encryption type.
|
|
|
865
|
|
|
866 MAGIC-REGEXP regexp that must match very close to the beginning of an
|
|
|
867 encrypted buffer. This may also be some elisp expression to be evaluated at
|
|
|
868 \(point-min\) that will return t for an encrypted buffer. If this is set to
|
|
|
869 nil then crypt++ will never try to decrypt a buffer. Currently set to the
|
|
|
870 internal variable `crypt-encryption-magic-regexp' which will match non-ASCII
|
|
|
871 characters.
|
|
|
872
|
|
|
873 MAGIC-REGEXP-INVERSE regexp that must _NOT_ match very close to the beginning
|
|
|
874 of an encrypted buffer. This may also be some elisp expression to be
|
|
|
875 evaluated at \(point-min\) that will return t for a NON-encrypted buffer.
|
|
|
876 If this is set to t then crypt++ will never try to decrypt a buffer.
|
|
|
877 Currently set to the internal variable `crypt-encryption-magic-regexp-inverse'
|
|
|
878 which will match Sun OS, 4.x BSD, and Ultrix executable magic numbers, so
|
|
|
879 binaries can still be edited (heh) without headaches.
|
|
|
880
|
|
|
881 FILE-EXTENSION regexp denoting the file extension usually appended the
|
|
|
882 filename of files encrypted with ENCRYPT-PROGRAM. The variable
|
|
|
883 `crypt-encryption-file-extension' will over ride the default.
|
|
|
884
|
|
|
885 ENCRYPT-PROGRAM name of executable file to be used for encryption.
|
|
|
886
|
|
|
887 DECRYPT-PROGRAM name of executable file to be used for decryption.
|
|
|
888
|
|
|
889 ENCRYPT-ARGS arguments to be passed to ENCRYPT-PROGRAM may be a string or a
|
|
|
890 list of strings or nil.
|
|
|
891
|
|
|
892 DECRYPT-ARGS arguments to be passed to DECRYPT-PROGRAM may be a string or a
|
|
|
893 list of strings or nil.
|
|
|
894
|
|
|
895 MINOR-MODE string denoting the name for the encrypted minor mode as it will
|
|
|
896 appear in the mode line.
|
|
|
897
|
|
|
898 GARBAGE-REGEXP-OR-LISPEXP dummy variable for compatibility with encoding.
|
|
|
899
|
|
|
900 FILE-EXTENSION-TRICKS is t or nil depending on whether or not tricks
|
|
|
901 converting between different encryption types can be done based on
|
|
|
902 FILE-EXTENSION; typically t.
|
|
|
903 ")
|
|
|
904
|
|
|
905
|
|
|
906 ;;; ENCODING
|
|
|
907
|
|
120
|
908 (defcustom crypt-auto-decode-buffer t
|
|
0
|
909 "*t says buffers visiting encoded files will be decoded automatically.
|
|
120
|
910 nil means to ask before doing the decoding."
|
|
|
911 :type 'boolean
|
|
|
912 :group 'crypt)
|
|
0
|
913
|
|
120
|
914 (defcustom crypt-auto-write-buffer nil
|
|
0
|
915 "*t says save files with `crypt-encoding-alist' file extensions as encoded.
|
|
|
916 nil says to ask before doing this encoding. Similarly, buffers originating
|
|
|
917 from encoded files to be written to files not ending in `crypt-encoding-alist'
|
|
|
918 file extensions will be written in plain format automatically. nil says to
|
|
120
|
919 ask before doing this decoding."
|
|
|
920 :type 'boolean
|
|
|
921 :group 'crypt)
|
|
0
|
922
|
|
|
923 ;; This is an internal variable documented here and not in a DOCSTRING in
|
|
|
924 ;; order to save memory. If this variable's value has been changed from its
|
|
|
925 ;; default, then it contains the answer to the question "Write out buffer
|
|
|
926 ;; foobar using `compression-type'?". This question is asked only if *plain*
|
|
|
927 ;; buffer foobar is being written to disk *and* it has a provocative
|
|
|
928 ;; `compression-type' file-name extension (see DOCSTRING for variable
|
|
|
929 ;; crypt-auto-write-buffer). The variable is local to all buffers with a
|
|
|
930 ;; default value of 'ask so if the situation described above arises, then the
|
|
|
931 ;; question is asked at least once, unless the user-defined variable
|
|
|
932 ;; crypt-auto-write-buffer is non-nil.
|
|
|
933 (defvar crypt-auto-write-answer-local 'ask)
|
|
|
934 (make-variable-buffer-local 'crypt-auto-write-answer-local)
|
|
|
935 (setq-default crypt-auto-write-answer-local 'ask)
|
|
|
936 (put 'crypt-auto-write-answer-local 'permanent-local t) ; for v19 Emacs
|
|
|
937 (put 'crypt-auto-write-answer-local 'preserved t) ; for kill-fix.el
|
|
|
938
|
|
120
|
939 (defcustom crypt-query-if-interactive t
|
|
0
|
940 "*t says ask when saving buffers where `crypt-encoded-mode' was toggled.
|
|
|
941 nil says that even if filename extension is plain (i.e., not listed in
|
|
|
942 `crypt-encoding-alist') buffer will be written in an encoded format without
|
|
|
943 asking.
|
|
|
944
|
|
|
945 This variable is designed for users that edit a plain file (with plain
|
|
|
946 extension) and then toggle `(crypt-encoded-mode)' and do not wish to be
|
|
|
947 queried every time that they save the buffer.
|
|
|
948
|
|
|
949 NOTE: if `(crypt-encoded-mode)' was not called interactively (the usual
|
|
|
950 scenario) then the value of this variable has no effect on how the buffer is
|
|
|
951 written to disk. In such a case `crypt-no-extension-implies-plain' is then
|
|
120
|
952 the relevant variable."
|
|
|
953 :type 'boolean
|
|
|
954 :group 'crypt)
|
|
0
|
955
|
|
120
|
956 (defcustom crypt-no-extension-implies-plain t
|
|
0
|
957 "*t says file extensions not in `crypt-encoding-alist' may be written plain.
|
|
|
958 if `crypt-auto-write-buffer' is also t then any file ending in a plain
|
|
|
959 extension is written in plain format automatically, otherwise query user.
|
|
|
960
|
|
|
961 nil says user works with encoded (compressed) files without file extensions
|
|
|
962 and will not be queried each time they save these files.
|
|
|
963
|
|
|
964 NOTE: (1) this does not effect find-file (C-x C-f) since that works with a
|
|
|
965 magic regexp. (2) there is no way to distinguish between write-file and
|
|
120
|
966 save-buffer so nil will mean that neither will query."
|
|
|
967 :type 'boolean
|
|
|
968 :group 'crypt)
|
|
0
|
969
|
|
120
|
970 (defcustom crypt-freeze-vs-fortran t
|
|
0
|
971 "*t says `.F' file extension denotes a frozen file not a Fortran file.
|
|
|
972 If you change this variable after crypt++ has been loaded then do
|
|
120
|
973 \\[crypt-rebuild-tables]."
|
|
|
974 :type 'boolean
|
|
|
975 :group 'crypt)
|
|
0
|
976
|
|
120
|
977 (defcustom crypt-compact-vs-C++ nil
|
|
0
|
978 "*t says `.C' file extension denotes a compacted file not a C++ file.
|
|
|
979 If you change this variable after crypt++ has been loaded then do
|
|
120
|
980 \\[crypt-rebuild-tables]."
|
|
|
981 :type 'boolean
|
|
|
982 :group 'crypt)
|
|
0
|
983
|
|
120
|
984 (defcustom crypt-ignored-filenames nil
|
|
0
|
985 "*List of regexp filenames for which encoded to plain conversion is not done.
|
|
|
986 A filename with a plain extension, in encoded format, that is matched by one of
|
|
|
987 these elements will be saved in encoded format without a query for conversion to
|
|
|
988 plain format.
|
|
|
989
|
|
|
990 This variable is provided for users that want to compress their incoming mail
|
|
|
991 for RMAIL and VM which look for files `RMAIL' and `INBOX,' respectively, to
|
|
|
992 store incoming mail. For example, the gzip extensions on `RMAIL.gz' and
|
|
|
993 `INBOX.gz' can be removed, this variable set to '\(\"INBOX$\" \"RMAIL$\"\) and
|
|
120
|
994 no query about conversion to plain format will be made."
|
|
|
995 :type '(repeat regexp)
|
|
|
996 :group 'crypt)
|
|
0
|
997
|
|
120
|
998 (defcustom crypt-default-encoding "gzip"
|
|
0
|
999 "*Default encoding type as string used when `crypt-encoded-mode' is toggled.
|
|
120
|
1000 Must match one of the elements of `crypt-encoding-alist'."
|
|
|
1001 :type 'string
|
|
|
1002 :group 'crypt)
|
|
0
|
1003
|
|
120
|
1004 (defcustom crypt-dos-has-ctrl-z nil
|
|
0
|
1005 "t if this buffer had a ctrl-z stripped from end, otherwise, nil.
|
|
120
|
1006 Buffer local and set by `crypt-dos-to-unix-region'"
|
|
|
1007 :type 'boolean
|
|
|
1008 :group 'crypt)
|
|
0
|
1009 (make-variable-buffer-local 'crypt-dos-has-ctrl-z)
|
|
|
1010 (setq-default crypt-dos-has-ctrl-z nil)
|
|
|
1011 (put 'crypt-dos-has-ctrl-z 'permanent-local t) ; for v19 Emacs
|
|
|
1012 (put 'crypt-dos-has-ctrl-z 'preserved t) ; for kill-fix.el
|
|
|
1013
|
|
|
1014 (defun crypt-build-encoding-alist ()
|
|
|
1015 ;; Returns the encoding alist
|
|
|
1016 (list
|
|
|
1017 ;; compress
|
|
|
1018 (list 'compress
|
|
|
1019 "\037\235" nil
|
|
|
1020 "\\(\\.Z\\)$"
|
|
|
1021 "compress" "uncompress"
|
|
|
1022 nil nil
|
|
|
1023 "Compress"
|
|
|
1024 nil
|
|
|
1025 t)
|
|
|
1026 ;; gzip (GNU zip)
|
|
|
1027 (list 'gzip
|
|
|
1028 "\037\213" nil
|
|
|
1029 "\\(\\.g?z\\)$"
|
|
|
1030 "gzip" "gzip"
|
|
|
1031 "--quiet" "--decompress --quiet"
|
|
|
1032 "Zip"
|
|
|
1033 nil
|
|
|
1034 t)
|
|
|
1035 ;; freeze
|
|
|
1036 (list 'freeze
|
|
|
1037 "\037\236\\|\037\237" nil
|
|
|
1038 "\\(\\.F\\)$"
|
|
|
1039 "freeze" "freeze"
|
|
|
1040 "" "-d"
|
|
|
1041 "Freeze"
|
|
|
1042 nil
|
|
|
1043 crypt-freeze-vs-fortran)
|
|
|
1044 ;; compact
|
|
|
1045 (list 'compact
|
|
|
1046 "\377\037" nil
|
|
|
1047 "\\(\\.C\\)$"
|
|
|
1048 "compact" "uncompact"
|
|
|
1049 nil nil
|
|
|
1050 "Compact"
|
|
|
1051 "^Compression *:.*\n"
|
|
|
1052 crypt-compact-vs-C++)
|
|
|
1053 ;; DOS
|
|
|
1054 (list 'dos
|
|
|
1055 "[^\n\r]*\r$" nil
|
|
|
1056 "\\(\\.DOS\\)$"
|
|
|
1057 'crypt-unix-to-dos-region 'crypt-dos-to-unix-region
|
|
|
1058 nil nil
|
|
|
1059 "Dos"
|
|
|
1060 nil
|
|
|
1061 nil)
|
|
|
1062 ;; Add new elements here ...
|
|
|
1063 ))
|
|
|
1064
|
|
|
1065 (defconst crypt-encoding-alist (crypt-build-encoding-alist)
|
|
|
1066 "List of elements describing the encoding methods available.
|
|
|
1067 each element looks like
|
|
|
1068
|
|
|
1069 \(ENCODING-TYPE
|
|
|
1070 MAGIC-REGEXP MAGIC-REGEXP-INVERSE
|
|
|
1071 FILE-EXTENSION
|
|
|
1072 ENCODE-PROGRAM DECODE-PROGRAM
|
|
|
1073 ENCODE-ARGS DECODE-ARGS
|
|
|
1074 MINOR-MODE
|
|
|
1075 GARBAGE-REGEXP-OR-LISPEXP
|
|
|
1076 FILE-EXTENSION-TRICKS
|
|
|
1077 \)
|
|
|
1078
|
|
|
1079 ENCODING-TYPE is a symbol denoting the encoding type. Currently known
|
|
|
1080 encodings are (compress compact freeze gzip).
|
|
|
1081
|
|
|
1082 MAGIC-REGEXP is a regexp that matches the magic number at the
|
|
|
1083 beginning of files encoded with ENCODING-TYPE.
|
|
|
1084
|
|
|
1085 MAGIC-REGEXP-INVERSE dummy variable for compatibility with encryption.
|
|
|
1086
|
|
|
1087 FILE-EXTENSION is a string denoting the file extension usually
|
|
|
1088 appended the filename of files encoded with ENCODING-TYPE.
|
|
|
1089
|
|
|
1090 ENCODE-PROGRAM is a string denoting the name of the executable used to
|
|
|
1091 encode files.
|
|
|
1092
|
|
|
1093 DECODE-PROGRAM is a string denoting the name of the executable used to
|
|
|
1094 decode files.
|
|
|
1095
|
|
|
1096 ENCODE-ARGS arguments to be passed to ENCODE-PROGRAM may be a string or a
|
|
|
1097 list of strings or nil.
|
|
|
1098
|
|
|
1099 DECODE-ARGS arguments to be passed to DECODE-PROGRAM may be a string or a
|
|
|
1100 list of strings or nil.
|
|
|
1101
|
|
|
1102 MINOR-MODE is a string denoting the name for the encoded minor mode as
|
|
|
1103 it will appear in the mode line.
|
|
|
1104
|
|
|
1105 GARBAGE-REGEXP-OR-LISPEXP is (1) a regexp that matches any extraneous text
|
|
|
1106 that is produced by the ENCODE-COMMAND including any newlines and will be
|
|
|
1107 removed from the buffer before saving to disk; (2) a lisp expression that will
|
|
|
1108 clean up extraneous material in the buffer or nil. This is normally not
|
|
|
1109 needed but can be derived for any ENCODE-COMMAND by checking the standard
|
|
|
1110 error that results from `sh -c \"cat foo | ENCODE-COMMAND > bar\"'.
|
|
|
1111
|
|
|
1112 FILE-EXTENSION-TRICKS is t or nil depending on whether or not tricks
|
|
|
1113 converting between different encoding types can be done based on
|
|
|
1114 FILE-EXTENSION; typically t.
|
|
|
1115 ")
|
|
|
1116
|
|
|
1117
|
|
|
1118 ;;; This allows the user to alter contents of the encoding and encryption
|
|
|
1119 ;;; table variables without having to reload all of crypt++.
|
|
|
1120 (defun crypt-rebuild-tables ()
|
|
|
1121 "Rebuilds the encryption and encoding tables and `minor-mode-alist'.
|
|
|
1122 Allows user to alter variables used in building these tables. May be called
|
|
|
1123 interactively or in an initialization file. Part of `after-init-hook'."
|
|
|
1124 (interactive)
|
|
|
1125 (setq crypt-encryption-alist (crypt-build-encryption-alist)
|
|
|
1126 crypt-encoding-alist (crypt-build-encoding-alist))
|
|
|
1127 (crypt-rebuild-minor-modes-alist))
|
|
|
1128
|
|
|
1129
|
|
|
1130 ;;; Buffer locals.
|
|
|
1131
|
|
|
1132 (defvar crypt-buffer-save-encrypted nil
|
|
|
1133 "*non-nil says save buffer encrypted with `crypt-encryption-type.'
|
|
|
1134 local to all buffers.")
|
|
|
1135 (make-variable-buffer-local 'crypt-buffer-save-encrypted)
|
|
|
1136 (put 'crypt-buffer-save-encrypted 'permanent-local t) ; for v19 Emacs
|
|
|
1137 (put 'crypt-buffer-save-encrypted 'preserved t) ; for kill-fix.el
|
|
|
1138
|
|
|
1139 (defvar crypt-buffer-encryption-key nil
|
|
|
1140 "*Key used for encryption of current buffer. Local to all buffers.")
|
|
|
1141 (make-variable-buffer-local 'crypt-buffer-encryption-key)
|
|
|
1142 (put 'crypt-buffer-encryption-key 'permanent-local t) ; for v19 Emacs
|
|
|
1143 (put 'crypt-buffer-encryption-key 'preserved t) ; for kill-fix.el
|
|
|
1144
|
|
|
1145 (defvar crypt-buffer-save-encoded nil
|
|
|
1146 "*non-nil says buffer will be saved encoded. Local to all buffers.")
|
|
|
1147 (make-variable-buffer-local 'crypt-buffer-save-encoded)
|
|
|
1148 (put 'crypt-buffer-save-encoded 'permanent-local t) ; for v19 Emacs
|
|
|
1149 (put 'crypt-buffer-save-encoded 'preserved t) ; for kill-fix.el
|
|
|
1150
|
|
|
1151 (defvar crypt-buffer-encoding-type nil
|
|
|
1152 "*non-nil says buffer is encoded with ENCODING-TYPE. Local to all buffers.")
|
|
|
1153 (make-variable-buffer-local 'crypt-buffer-encoding-type)
|
|
|
1154 (put 'crypt-buffer-encoding-type 'permanent-local t) ; for v19 Emacs
|
|
|
1155 (put 'crypt-buffer-encoding-type 'preserved t) ; for kill-fix.el
|
|
|
1156
|
|
|
1157 (defvar crypt-buffer-interactive-encoded-mode nil
|
|
|
1158 "t says `crypt-encoded-mode' was toggled interactively, almost always nil.
|
|
|
1159 Local to all buffers.")
|
|
|
1160 (make-variable-buffer-local 'crypt-buffer-interactive-encoded-mode)
|
|
|
1161 (put 'crypt-buffer-interactive-encoded-mode 'permanent-local t) ; v19 Emacs
|
|
|
1162 (put 'crypt-buffer-interactive-encoded-mode 'preserved t) ; kill-fix.el
|
|
|
1163
|
|
|
1164
|
|
|
1165 ;;; Functions and macros that search `crypt-encryption-alist' and
|
|
|
1166 ;;; `crypt-encoding-alist'.
|
|
|
1167
|
|
|
1168 (defun crypt-get-alist-member (type n)
|
|
|
1169 ;; Returns TYPE's Nth element
|
|
|
1170 (nth n (or (assoc type crypt-encryption-alist)
|
|
|
1171 (assoc type crypt-encoding-alist))))
|
|
|
1172
|
|
|
1173 (defmacro crypt-get-magic-regexp (type)
|
|
|
1174 ;; Returns regexp found at top of files encoded/encrypted with TYPE.
|
|
|
1175 (list 'crypt-get-alist-member type 1))
|
|
|
1176
|
|
|
1177 (defmacro crypt-get-magic-regexp-inverse (type)
|
|
|
1178 ;; Returns regexp *not* found at top of files encoded/encrypted with TYPE.
|
|
|
1179 (list 'crypt-get-alist-member type 2))
|
|
|
1180
|
|
|
1181 (defmacro crypt-get-file-extension (type)
|
|
|
1182 ;; Returns regexp matching extension of files encoded/encrypted with TYPE.
|
|
|
1183 (list 'crypt-get-alist-member type 3))
|
|
|
1184
|
|
|
1185 (defmacro crypt-get-encoding-program (type)
|
|
|
1186 ;; Returns name of program, as string, used to encode/encrypt with TYPE.
|
|
|
1187 (list 'crypt-get-alist-member type 4))
|
|
|
1188
|
|
|
1189 (defmacro crypt-get-decoding-program (type)
|
|
|
1190 ;; Returns name of program, as string, used to decode/decrypt with TYPE.
|
|
|
1191 (list 'crypt-get-alist-member type 5))
|
|
|
1192
|
|
|
1193 (defmacro crypt-get-encoding-args (type)
|
|
|
1194 ;; Returns arguments passed to program used to encode/encrypt with TYPE.
|
|
|
1195 (list 'crypt-get-alist-member type 6))
|
|
|
1196
|
|
|
1197 (defmacro crypt-get-decoding-args (type)
|
|
|
1198 ;; Returns arguments passed to program used to decode/decrypt with TYPE.
|
|
|
1199 (list 'crypt-get-alist-member type 7))
|
|
|
1200
|
|
|
1201 (defmacro crypt-get-minor-mode-name (type)
|
|
|
1202 ;; Returns minor mode name, as string, for encoding/encrypting with TYPE.
|
|
|
1203 (list 'crypt-get-alist-member type 8))
|
|
|
1204
|
|
|
1205 (defmacro crypt-get-cleanup-regexp (type)
|
|
|
1206 ;; Returns regexp or lisp-exp for cleaning up encoding/encrypting with TYPE.
|
|
|
1207 (list 'crypt-get-alist-member type 9))
|
|
|
1208
|
|
|
1209 (defmacro crypt-get-extension-tricks (type)
|
|
|
1210 ;; Returns t if file extension tricks doable for encoding/encrypting with
|
|
|
1211 ;; TYPE.
|
|
|
1212 (list 'crypt-get-alist-member type 10))
|
|
|
1213
|
|
|
1214 (defun crypt-buffer-save-name (type)
|
|
|
1215 ;; Returns variable `crypt-buffer-save-TYPE', set to t if encoding with TYPE.
|
|
|
1216 ;; local to all buffers.
|
|
|
1217 (intern (concat "crypt-buffer-save-" (symbol-name type))))
|
|
|
1218
|
|
|
1219
|
|
|
1220 ;;; Create a buffer-local variable for each type of encoding.
|
|
|
1221 ;;; These variables are used to trigger the minor mode names.
|
|
|
1222
|
|
|
1223 (defun crypt-build-minor-mode-alist ()
|
|
|
1224 ;; Returns minor mode alist entries for encoded and encrypted buffers.
|
|
|
1225 (append
|
|
|
1226 ;; First the encrypted minor mode -- only one.
|
|
|
1227 (list (list 'crypt-buffer-save-encrypted
|
|
|
1228 (concat " " (crypt-get-minor-mode-name crypt-encryption-type))))
|
|
|
1229 ;; Now the encoding minor modes.
|
|
|
1230 (mapcar
|
|
|
1231 (function
|
|
|
1232 (lambda (element)
|
|
|
1233 (let ((variable (crypt-buffer-save-name (car element))))
|
|
|
1234 (make-variable-buffer-local variable)
|
|
|
1235 (put variable 'permanent-local t) ; for v19 Emacs
|
|
|
1236 (put variable 'preserved t) ; for kill-fix.el
|
|
|
1237 (list variable
|
|
|
1238 (concat " " (crypt-get-minor-mode-name (car element)))))))
|
|
|
1239 crypt-encoding-alist)))
|
|
|
1240
|
|
|
1241 (defconst crypt-minor-mode-alist (crypt-build-minor-mode-alist)
|
|
|
1242 "Alist containing encoded and encrypted minor modes.
|
|
|
1243 Derived from variable `crypt-encoding-alist' and function
|
|
|
1244 `crypt-build-minor-mode-encrypted'")
|
|
|
1245
|
|
|
1246 (defun crypt-rebuild-minor-modes-alist ()
|
|
|
1247 ;; Rebuilds the encryption and encoding minor modes and `minor-mode-alist.'
|
|
|
1248 ;; Allows user to alter variables used in building this alist. Called by
|
|
|
1249 ;; `crypt-rebuild-tables' and so part of `after-init-hook'."
|
|
|
1250
|
|
|
1251 ;; First remove old crypt minor mode entries from `minor-mode-alist'.
|
|
|
1252 (if (memq (car crypt-minor-mode-alist) minor-mode-alist)
|
|
|
1253 (let ((alist crypt-minor-mode-alist) elt)
|
|
|
1254 (while (and alist (setq elt (car alist)))
|
|
|
1255 (setq minor-mode-alist (delq elt minor-mode-alist)
|
|
|
1256 alist (cdr alist)))))
|
|
|
1257
|
|
|
1258 ;; Get new crypt minor mode entries and add to minor-mode-alist.
|
|
|
1259 (setq crypt-minor-mode-alist (crypt-build-minor-mode-alist)
|
|
|
1260 minor-mode-alist (append crypt-minor-mode-alist minor-mode-alist)))
|
|
|
1261
|
|
|
1262
|
|
|
1263 (defmacro crypt-save-point (&rest body)
|
|
|
1264 ;; Save value of point, evaluate FORMS, and restore value of point. If the
|
|
|
1265 ;; saved value of point is no longer valid go to (point-max). This macro
|
|
|
1266 ;; exists because, save-excursion loses track of point during some types of
|
|
|
1267 ;; deletions.
|
|
|
1268 (let ((var (make-symbol "saved-point")))
|
|
|
1269 (list 'let (list (list var '(point)))
|
|
|
1270 (list 'unwind-protect
|
|
|
1271 (cons 'progn body)
|
|
|
1272 (list 'goto-char var)))))
|
|
|
1273
|
|
|
1274
|
|
|
1275 (defun crypt-find-file-hook ()
|
|
|
1276
|
|
|
1277 ;; Hook run for decoding and/or decrypting the contents of a buffer. Meant
|
|
|
1278 ;; to be called as part of `find-file-hooks'
|
|
|
1279
|
|
|
1280 (let ((buffer-file-name buffer-file-name)
|
|
|
1281 (old-buffer-file-name buffer-file-name)
|
|
|
1282 (old-buffer-modified-p (buffer-modified-p))
|
|
|
1283 (case-fold-search nil) ; case-sensitive
|
|
|
1284 encrypted encoded buffer-read-only)
|
|
|
1285
|
|
|
1286 ;; DECODE AND/OR DECRYPT
|
|
|
1287 (crypt-save-point
|
|
|
1288
|
|
|
1289 ;; Do we have to DECODE? If not, then move on.
|
|
|
1290 (if (and (crypt-encoded-p)
|
|
|
1291 (or crypt-auto-decode-buffer
|
|
|
1292 (y-or-n-p (format "Decode %s? " (buffer-name)))))
|
|
|
1293
|
|
|
1294 ;; Decode, uncompress, the buffer.
|
|
|
1295 (progn
|
|
|
1296
|
|
|
1297 (if (and (not (null buffer-file-name))
|
|
|
1298 (string-match "\\.Z$" buffer-file-name))
|
|
|
1299 (set-visited-file-name
|
|
|
1300 (substring buffer-file-name 0 (match-beginning 0)))
|
|
|
1301 (if (and (not (null buffer-file-name))
|
|
|
1302 (string-match "\\.gz$" buffer-file-name))
|
|
|
1303 (set-visited-file-name
|
|
|
1304 (substring buffer-file-name 0 (match-beginning 0)))))
|
|
|
1305 (message "Decoding %s..." (buffer-name))
|
|
|
1306 (crypt-encode-buffer t)
|
|
|
1307
|
|
|
1308 ;; Store the encoding mode.
|
|
|
1309
|
|
|
1310 ;; We can not yet go into the minor modes because the major mode
|
|
|
1311 ;; may change later on and blow away all local variables (and thus
|
|
|
1312 ;; the minor modes). Only needed for vanilla v18. Our
|
|
|
1313 ;; buffer-locals defined 'permanent-local for v19 Emacs and
|
|
|
1314 ;; 'preserved for kill-fix.el.
|
|
|
1315
|
|
|
1316 (setq encoded crypt-buffer-encoding-type)
|
|
|
1317
|
|
|
1318 ;; Strip encoded file's extension so later we can set buffer's
|
|
|
1319 ;; major mode based on its file-name sans encoding extension.
|
|
|
1320 (if (string-match (crypt-get-file-extension
|
|
|
1321 crypt-buffer-encoding-type) buffer-file-name)
|
|
|
1322 (setq buffer-file-name
|
|
|
1323 (substring buffer-file-name 0 (match-beginning 1))))
|
|
|
1324
|
|
|
1325 ;; Decoding ends.
|
|
|
1326 (if (not (input-pending-p))
|
|
|
1327 (message "Decoding %s... done" (buffer-name)))))
|
|
|
1328
|
|
|
1329 ;; Do we have to DECRYPT? If not, then move on.
|
|
|
1330 (if (crypt-encrypted-p)
|
|
|
1331
|
|
|
1332 ;; Decrypt buffer.
|
|
|
1333 (progn
|
|
|
1334
|
|
|
1335 (message "Decrypting %s..." (buffer-name))
|
|
|
1336 (crypt-encrypt-buffer crypt-buffer-encryption-key t)
|
|
|
1337
|
|
|
1338 ;; Save key in case major mode blows all buffer-locals.
|
|
|
1339
|
|
|
1340 ;; Only needed for vanilla v18. Our buffer-locals defined
|
|
|
1341 ;; 'permanent-local for v19 Emacs and 'preserved for
|
|
|
1342 ;; kill-fix.el.
|
|
|
1343
|
|
|
1344 (setq encrypted crypt-buffer-encryption-key)
|
|
|
1345
|
|
|
1346 ;; Strip encrypted file's extension so later we can set buffer's
|
|
|
1347 ;; major mode based on its file-name sans encrypting extension.
|
|
|
1348 (if (and (crypt-get-extension-tricks crypt-encryption-type)
|
|
|
1349 (string-match (crypt-get-file-extension
|
|
|
1350 crypt-encryption-type) buffer-file-name))
|
|
|
1351 (setq buffer-file-name
|
|
|
1352 (substring buffer-file-name 0 (match-beginning 1))))
|
|
|
1353
|
|
|
1354 (if (not (input-pending-p))
|
|
|
1355 (message "Decrypting %s... done" (buffer-name))))))
|
|
|
1356
|
|
|
1357 ;; MAJOR AND MINOR MODES
|
|
|
1358
|
|
|
1359 ;; OK, if any changes have been made to the buffer we need to rerun the
|
|
|
1360 ;; code the does automatic selection of major mode.
|
|
|
1361
|
|
|
1362 (if (or encoded encrypted)
|
|
|
1363
|
|
|
1364 (progn
|
|
|
1365
|
|
|
1366 ;; Set the major mode.
|
|
|
1367 (set-auto-mode)
|
|
|
1368 (hack-local-variables)
|
|
|
1369
|
|
|
1370 ;; Now set our own minor mode(s).
|
|
|
1371 (if encoded
|
|
|
1372 ;; Recover encoding type, may have been smashed by major mode,
|
|
|
1373 ;; and toggle encoded mode.
|
|
|
1374 (progn (setq crypt-buffer-encoding-type encoded)
|
|
|
1375 (crypt-encoded-mode 1)))
|
|
|
1376
|
|
|
1377 (if encrypted
|
|
|
1378 ;; Recover encryption key, may have been smashed by major mode,
|
|
|
1379 ;; and toggle encrypted mode.
|
|
|
1380 (progn (setq crypt-buffer-encryption-key encrypted)
|
|
|
1381 (crypt-encrypted-mode 1)))
|
|
|
1382
|
|
|
1383 ;; Restore buffer file name now, so that lock file entry is removed
|
|
|
1384 ;; properly.
|
|
|
1385 (setq buffer-file-name old-buffer-file-name)
|
|
|
1386
|
|
|
1387 ;; Restore buffer modified flag to its previous value. Will also
|
|
|
1388 ;; remove lock file entry for buffer if previous value was nil.
|
|
|
1389 ;; This is why buffer-file-name had to be restored manually above.
|
|
|
1390 (set-buffer-modified-p old-buffer-modified-p)))))
|
|
|
1391
|
|
|
1392 (defun crypt-encoded-p (&optional buffer)
|
|
|
1393 ;; Returns t if current buffer, or optionally BUFFER, is encoded.
|
|
|
1394 ;; Sets `crypt-buffer-encoding-type' to encoding method.
|
|
|
1395 (save-excursion
|
|
|
1396 (and buffer (set-buffer buffer))
|
|
|
1397 (save-restriction
|
|
|
1398 (widen)
|
|
|
1399 (goto-char (point-min))
|
|
|
1400 (let ((alist crypt-encoding-alist) elt found)
|
|
|
1401 (while (and alist (setq elt (car alist)) (not found))
|
|
|
1402 (if (looking-at (nth 1 elt))
|
|
|
1403 (setq crypt-buffer-encoding-type (nth 0 elt)
|
|
|
1404 found t)
|
|
|
1405 ;; Decrement
|
|
|
1406 (setq alist (cdr alist))))
|
|
|
1407 found))))
|
|
|
1408
|
|
|
1409 (defun crypt-encrypted-p (&optional buffer)
|
|
|
1410 ;; Returns t if current buffer, or optionally BUFFER, is encrypted.
|
|
|
1411 ;; Look for MAGIC-REGEXP and absence of MAGIC-REGEXP-INVERSE. If so, then
|
|
|
1412 ;; assume it is an encrypted buffer.
|
|
|
1413 ;; Sets `crypt-buffer-encryption-key' to password if not set already.
|
|
|
1414
|
|
|
1415 ;; Do not try to decrypt buffer if not wanted.
|
|
|
1416 (if (not crypt-never-ever-decrypt)
|
|
|
1417
|
|
|
1418 (save-excursion
|
|
|
1419 (and buffer (set-buffer buffer))
|
|
|
1420
|
|
|
1421 (save-restriction
|
|
|
1422 (widen)
|
|
|
1423 (goto-char (point-min))
|
|
|
1424
|
|
|
1425 (let ((magic-regexp (crypt-get-magic-regexp crypt-encryption-type))
|
|
|
1426 (magic-regexp-inverse (crypt-get-magic-regexp-inverse
|
|
|
1427 crypt-encryption-type))
|
|
|
1428 (limit (min (point-max) crypt-magic-search-limit)))
|
|
|
1429
|
|
|
1430 ;; Check all encryption conditions. If any fail, then return nil
|
|
|
1431 ;; value of this if-form, else check for password.
|
|
|
1432 (if (and
|
|
|
1433
|
|
|
1434 ;; Check for existence of MAGIC-REGEXP.
|
|
|
1435 (if (stringp magic-regexp)
|
|
|
1436 ;; regular expression
|
|
|
1437 (re-search-forward magic-regexp limit t)
|
|
|
1438 ;; lisp expression
|
|
|
1439 (eval magic-regexp))
|
|
|
1440
|
|
|
1441 (goto-char (point-min))
|
|
|
1442
|
|
|
1443 ;; Check for absence of MAGIC-REGEXP-INVERSE.
|
|
|
1444 (not (if (stringp magic-regexp-inverse)
|
|
|
1445 ;; regular expression
|
|
|
1446 (re-search-forward magic-regexp-inverse limit t)
|
|
|
1447 ;; lisp expression
|
|
|
1448 (eval magic-regexp-inverse))))
|
|
|
1449
|
|
|
1450 (progn
|
|
|
1451
|
|
|
1452 ;; Get key, i.e., the password?
|
|
|
1453 (or crypt-buffer-encryption-key
|
|
|
1454 ;; Do not confirm on reading an encrypted file.
|
|
|
1455 (let ((crypt-confirm-password nil))
|
|
|
1456 (call-interactively 'crypt-set-encryption-key)))
|
|
|
1457
|
|
|
1458 ;; Do not turn on encryption mode if no key: may be a binary
|
|
|
1459 ;; file. Thanks to Paul Dworkin (paul@media-lab.media.mit.edu).
|
|
|
1460 (if (equal crypt-buffer-encryption-key "")
|
|
|
1461 ;; Return nil.
|
|
|
1462 (progn
|
|
|
1463 (message "No key given. Assumed normal.")
|
|
|
1464 nil)
|
|
|
1465 ;; Return t.
|
|
|
1466 t))))))))
|
|
|
1467
|
|
|
1468
|
|
|
1469 ;;;
|
|
|
1470
|
|
|
1471 (defun crypt-check-extension-for-encoding ()
|
|
|
1472
|
|
|
1473 ;; Checks file extensions for possible toggling of encoding modes. Used for
|
|
|
1474 ;; buffers to be written to disk and called by `crypt-write-file-hook'
|
|
|
1475
|
|
|
1476 ;; We try to flag a buffer to be written out in encoded form if the file
|
|
|
1477 ;; ends in one of the file-extensions in `crypt-encoding-alist' even if
|
|
|
1478 ;; `crypt-buffer-save-encoded' is nil. Conversely, we try to write out a
|
|
|
1479 ;; buffer as a plain file if it does _not_ end in one of these
|
|
|
1480 ;; file-extensions even if `crypt-buffer-save-encoded' is non-nil.
|
|
|
1481
|
|
|
1482 (let ((alist crypt-encoding-alist)
|
|
|
1483 (case-fold-search nil)
|
|
|
1484 found elt)
|
|
|
1485
|
|
|
1486 ;; Search through the file name extensions for a match.
|
|
|
1487 (while (and alist (setq elt (car alist)) (not found))
|
|
|
1488 (if (string-match (nth 3 elt) buffer-file-name)
|
|
|
1489 (setq found t)
|
|
|
1490 ;; Decrement.
|
|
|
1491 (setq alist (cdr alist))))
|
|
|
1492
|
|
|
1493 ;; Did we find a match?
|
|
|
1494 (if found
|
|
|
1495
|
|
|
1496 ;; File name ends in a very provocative extension.
|
|
|
1497
|
|
|
1498 ;; Check to see if already an encoded file.
|
|
|
1499 (if crypt-buffer-save-encoded
|
|
|
1500
|
|
|
1501 ;; Already encoded - do the methods of encoding match?
|
|
|
1502 (if (not (eq (nth 0 elt) crypt-buffer-encoding-type))
|
|
|
1503
|
|
|
1504 ;; A new encoding method is desired.
|
|
|
1505
|
|
|
1506 ;; Can we play some filename extension tricks with the
|
|
|
1507 ;; destination extension?
|
|
|
1508 (if (crypt-get-extension-tricks (nth 0 elt))
|
|
|
1509
|
|
|
1510 ;; Can play tricks.
|
|
|
1511 ;; Change the method of encoding?
|
|
|
1512 (if (crypt-y-or-n-p (format "Write %s using %s? "
|
|
|
1513 (buffer-name) (nth 4 elt)))
|
|
|
1514
|
|
|
1515 ;; Case one.
|
|
|
1516 ;; Turn off original encoding and turn on new encoding.
|
|
|
1517 (progn (crypt-encoded-mode -1)
|
|
|
1518 (setq crypt-buffer-encoding-type (nth 0 elt))
|
|
|
1519 (crypt-encoded-mode 1)))
|
|
|
1520
|
|
|
1521 ;; Can not play tricks - maybe wants a plain file?
|
|
|
1522 (if (crypt-y-or-n-p (format "Write %s a plain file? "
|
|
|
1523 (buffer-name)))
|
|
|
1524
|
|
|
1525 ;; Case three.
|
|
|
1526 ;; Turn off the minor mode and _then_ the flags.
|
|
|
1527 (progn
|
|
|
1528 (crypt-encoded-mode -1)
|
|
|
1529 (setq crypt-buffer-save-encoded nil
|
|
|
1530 crypt-buffer-encoding-type nil)))))
|
|
|
1531
|
|
|
1532 ;; Was a plain file.
|
|
|
1533 (if (and
|
|
|
1534 ;; Can we play some filename extension tricks?
|
|
|
1535 ;; If not then we must abort.
|
|
|
1536 (crypt-get-extension-tricks (nth 0 elt))
|
|
|
1537
|
|
|
1538 (crypt-y-or-n-p (format "Write %s using %s? "
|
|
|
1539 (buffer-name) (nth 4 elt))))
|
|
|
1540
|
|
|
1541 ;; Case two.
|
|
|
1542 ;; Turn on encoding flags and _then_ the minor mode.
|
|
|
1543 (progn
|
|
|
1544 (setq crypt-buffer-save-encoded t
|
|
|
1545 crypt-buffer-encoding-type (nth 0 elt))
|
|
|
1546 (crypt-encoded-mode 1))))
|
|
|
1547
|
|
|
1548 ;; No match - a plain-jane file extension - but if the encoded flag is
|
|
|
1549 ;; non-nil then the user may really want it written out in plain
|
|
|
1550 ;; format so we must override this flag.
|
|
|
1551 (if (and crypt-buffer-save-encoded
|
|
|
1552
|
|
|
1553 ;; Search the list of files to be ignored.
|
|
|
1554 ;; If `crypt-ignored-filenames' is nil then this let form
|
|
|
1555 ;; will return t. If a match is found this form will return
|
|
|
1556 ;; nil. Otherwise it will return t.
|
|
|
1557 (let ((tlist crypt-ignored-filenames)
|
|
|
1558 case-fold-search found elt)
|
|
|
1559
|
|
|
1560 ;; Search through the list of filenames for a match.
|
|
|
1561 (while (and tlist (setq elt (car tlist)) (not found))
|
|
|
1562 (if (string-match elt buffer-file-name)
|
|
|
1563 (setq found t)
|
|
|
1564 ;; Decrement.
|
|
|
1565 (setq tlist (cdr tlist))))
|
|
|
1566
|
|
|
1567 ;; Return t if we can _not_ find a match.
|
|
|
1568 (not found))
|
|
|
1569
|
|
|
1570 ;; If `(crypt-encoded-mode)' was called interactively, then
|
|
|
1571 ;; there is a high probability that no matter what the file
|
|
|
1572 ;; name extension the user wishes to write the file out in some
|
|
|
1573 ;; encoded format. Thanks to Kimball Collins
|
|
|
1574 ;; <kpc@ptolemy.arc.nasa.gov> for pointing out the need for
|
|
|
1575 ;; this. Unfortunately, still can not distinguish between
|
|
|
1576 ;; write-file and save-buffer. In the former the user may want
|
|
|
1577 ;; to write in plain format (or indeed some other format).
|
|
|
1578
|
|
|
1579 (if crypt-buffer-interactive-encoded-mode
|
|
|
1580 ;; Interactive
|
|
|
1581 crypt-query-if-interactive
|
|
|
1582 ;; Non-interactive but still may want encoded format.
|
|
|
1583 crypt-no-extension-implies-plain)
|
|
|
1584
|
|
|
1585 (crypt-y-or-n-p (format "Write %s as a plain file? "
|
|
|
1586 (buffer-name))))
|
|
|
1587
|
|
|
1588 ;; Case three.
|
|
|
1589 ;; Turn off the minor mode and _then_ the flags.
|
|
|
1590 (progn
|
|
|
1591 (crypt-encoded-mode -1)
|
|
|
1592 (setq crypt-buffer-save-encoded nil
|
|
|
1593 crypt-buffer-encoding-type nil))))))
|
|
|
1594
|
|
|
1595
|
|
|
1596 (defun crypt-y-or-n-p (prompt)
|
|
|
1597 ;; Queries user based on `crypt-auto-write-buffer' and internal buffer-local
|
|
|
1598 ;; variable `crypt-auto-write-answer-local'. Returns value of
|
|
|
1599 ;; `crypt-auto-write-answer-local', which is t or nil.
|
|
|
1600
|
|
|
1601 ;; Check if we need to ask user. Should be 'ask, nil, or t.
|
|
|
1602 (if (eq crypt-auto-write-answer-local 'ask) ; Default value.
|
|
|
1603 ;; We may need to ask.
|
|
|
1604 (or crypt-auto-write-buffer
|
|
|
1605 ;; Ask and store the answer.
|
|
|
1606 ;; Note: we only store if we asked.
|
|
|
1607 (setq crypt-auto-write-answer-local (y-or-n-p prompt)))
|
|
|
1608 ;; Use previous answer.
|
|
|
1609 crypt-auto-write-answer-local)) ; Will be nil or t.
|
|
|
1610
|
|
|
1611
|
|
|
1612 ;;; This function should be called ONLY as a write-file hook.
|
|
|
1613 ;;; Odd things will happen if it is called elsewhere.
|
|
|
1614
|
|
|
1615 (defun crypt-write-file-hook ()
|
|
|
1616
|
|
|
1617 ;; Hook for possibly writing out file, and backup file, in a non-plain
|
|
|
1618 ;; format. Terminates calls in `write-file-hooks' and should be at end of
|
|
|
1619 ;; list.
|
|
|
1620
|
|
|
1621 ;; Check file-extension for possible toggling of encoding modes.
|
|
|
1622 (crypt-check-extension-for-encoding)
|
|
|
1623
|
|
|
1624 ;; Check extension for encryption.
|
|
|
1625 (if (and
|
|
|
1626
|
|
|
1627 ;; Maybe file ends with provocative extension w.r.t. encryption?
|
|
|
1628 (stringp (crypt-get-file-extension crypt-encryption-type))
|
|
|
1629 (let ((case-fold-search nil)) ; Make case-sensitive.
|
|
|
1630 (string-match (crypt-get-file-extension crypt-encryption-type)
|
|
|
1631 buffer-file-name))
|
|
|
1632
|
|
|
1633 ;; Can we play tricks?
|
|
|
1634 (crypt-get-extension-tricks crypt-encryption-type)
|
|
|
1635
|
|
|
1636 ;; Match of filename extension - is file in plain format?
|
|
|
1637 (not crypt-buffer-save-encrypted)
|
|
|
1638
|
|
|
1639 ;; Query?
|
|
|
1640 (or crypt-auto-write-buffer-encrypted
|
|
|
1641 (y-or-n-p
|
|
|
1642 (format "Write %s as an encrypted file? " (buffer-name)))))
|
|
|
1643
|
|
|
1644 (progn
|
|
|
1645 ;; Set password and toggle `crypt-encrypted-mode'
|
|
|
1646 (call-interactively 'crypt-set-encryption-key)
|
|
|
1647 (crypt-encrypted-mode 1)))
|
|
|
1648
|
|
|
1649 ;; Now decide whether or not we need to continue with this defun. Does the
|
|
|
1650 ;; buffer need to be saved in a non-plain form? If not then writing is not
|
|
|
1651 ;; done here but later in the write-file-hooks - probably at the end.
|
|
|
1652
|
|
|
1653 (if (or crypt-buffer-save-encoded crypt-buffer-save-encrypted)
|
|
|
1654
|
|
|
1655 (save-excursion
|
|
|
1656 (save-restriction
|
|
|
1657
|
|
|
1658 (let
|
|
|
1659
|
|
|
1660 ;; BINDINGS
|
|
|
1661 ((copy-buffer (get-buffer-create " *crypt copy buffer*"))
|
|
|
1662 (selective-display selective-display)
|
|
|
1663 (buffer-read-only))
|
|
|
1664
|
|
|
1665 ;; FORMS
|
|
|
1666 (copy-to-buffer copy-buffer 1 (1+ (buffer-size)))
|
|
|
1667 (narrow-to-region (point) (point))
|
|
|
1668
|
|
|
1669 (unwind-protect
|
|
|
1670
|
|
|
1671 ;; BODYFORM
|
|
|
1672 (let (setmodes)
|
|
|
1673
|
|
|
1674 ;; As of v19, if one of functions of the `write-file-hooks'
|
|
|
1675 ;; returns a non-nil value, then `basic-save-buffer' no
|
|
|
1676 ;; longer creates a backup file. We must do it ourselves.
|
|
|
1677 ;; this should be a no-op in v18.
|
|
|
1678 (or buffer-backed-up
|
|
|
1679 (setq setmodes (backup-buffer)))
|
|
|
1680
|
|
|
1681 (insert-buffer-substring copy-buffer)
|
|
|
1682 (kill-buffer copy-buffer)
|
|
|
1683
|
|
|
1684 ;; "Who would cross the Bridge of Death
|
|
|
1685 ;; Must answer me
|
|
|
1686 ;; These questions three
|
|
|
1687 ;; Ere the other side he see."
|
|
|
1688 ;;
|
|
|
1689 ;; Bridgekeeper from Monty Python and the Holy Grail
|
|
|
1690
|
|
|
1691 ;; [1] selective-display non-nil means we must convert
|
|
|
1692 ;; carriage returns to newlines now, and set the variable
|
|
|
1693 ;; selective-display temporarily to nil.
|
|
|
1694 (if selective-display
|
|
|
1695 (progn
|
|
|
1696 (goto-char (point-min))
|
|
|
1697 (subst-char-in-region (point-min) (point-max) ?\r ?\n)
|
|
|
1698 (setq selective-display nil)))
|
|
|
1699
|
|
|
1700 ;; [2] encryption
|
|
|
1701 (if crypt-buffer-save-encrypted
|
|
|
1702 (progn
|
|
|
1703 ;; check for password
|
|
|
1704 (if (not crypt-buffer-encryption-key)
|
|
|
1705 (call-interactively 'crypt-set-encryption-key))
|
|
|
1706 (if (null crypt-buffer-encryption-key)
|
|
|
1707 (error "No encryption key set for buffer %s"
|
|
|
1708 (buffer-name)))
|
|
|
1709 (if (not (stringp crypt-buffer-encryption-key))
|
|
|
1710 (error "Encryption key is not a string"))
|
|
|
1711 (message "Encrypting %s..." (buffer-name))
|
|
|
1712 (crypt-encrypt-buffer crypt-buffer-encryption-key)))
|
|
|
1713
|
|
|
1714 ;; [3] encoding
|
|
|
1715 (if crypt-buffer-save-encoded
|
|
|
1716 (progn
|
|
|
1717 (message "Encoding %s..." (buffer-name))
|
|
|
1718 (crypt-encode-buffer)))
|
|
|
1719
|
|
|
1720 ;; Now write buffer/region to disk.
|
|
|
1721 (write-region (point-min) (point-max) buffer-file-name nil t)
|
|
|
1722 (delete-region (point-min) (point-max))
|
|
|
1723 (set-buffer-modified-p nil)
|
|
|
1724
|
|
|
1725 ;; Now that the file is written, set its modes.
|
|
|
1726 (if setmodes
|
|
|
1727 (condition-case ()
|
|
|
1728 (set-file-modes buffer-file-name setmodes)
|
|
|
1729 (error nil)))
|
|
|
1730
|
|
|
1731 ;; Return t so that `basic-save-buffer' will know that the
|
|
|
1732 ;; save has already been done.
|
|
|
1733
|
|
|
1734 ;; NOTE: this TERMINATES write-file-hooks so any hooks
|
|
|
1735 ;; following this one will not be executed.
|
|
|
1736
|
|
|
1737 t )
|
|
|
1738
|
|
|
1739 ;; UNWINDFORMS
|
|
|
1740 ;; unwind...sit back...take a load off...have a beer
|
|
|
1741
|
|
|
1742 ;; If the encoded and encrypted stuff has already been removed
|
|
|
1743 ;; then this is a no-op. This form is executed if BODYFORM
|
|
|
1744 ;; completes normally but the value of BODYFORM is returned -
|
|
|
1745 ;; i.e., t is returned.
|
|
|
1746
|
|
|
1747 (delete-region (point-min) (point-max))))))))
|
|
|
1748
|
|
|
1749
|
|
|
1750 ;;;; ENCRYPTION
|
|
|
1751
|
|
|
1752 (defun crypt-encrypt-region (start end key &optional decrypt)
|
|
|
1753 "Encrypt region START to END using KEY and `crypt-encryption-type'. When
|
|
|
1754 called interactively START and END default to point and mark \(START being the
|
|
|
1755 lesser of the two\), and KEY is prompted for. With optional DECRYPT non-nil,
|
|
|
1756 decryption is done."
|
|
|
1757
|
|
|
1758 (interactive
|
|
|
1759 (let (decrypt)
|
|
|
1760 (barf-if-buffer-read-only)
|
|
|
1761 (list (region-beginning)
|
|
|
1762 (region-end)
|
|
|
1763 (crypt-read-string-no-echo
|
|
|
1764 (concat (if (setq decrypt (y-or-n-p "Decrypt region? ")) "De" "En")
|
|
|
1765 "crypt buffer using key: ")
|
|
|
1766 ;; Do not confirm on decrypting region.
|
|
|
1767 (if (not decrypt) crypt-confirm-password))
|
|
|
1768 decrypt)))
|
|
|
1769
|
|
|
1770 (crypt-save-point
|
|
|
1771
|
|
|
1772 ;; We define the PROGRAM as the encryption program or decryption program
|
|
|
1773 ;; listed for `crypt-encryption-type' of `crypt-encryption-alist.' These
|
|
|
1774 ;; should be just the name of the executable and should _not_ contain any
|
|
|
1775 ;; arguments. `(call-process-region)' would be confused if we tried to
|
|
|
1776 ;; pass the arguments as part of the PROGRAM. The arguments are passed
|
|
|
1777 ;; through the encryption args or decryption args listed for
|
|
|
1778 ;; `crypt-encryption-type' of `crypt-encryption-alist.'
|
|
|
1779
|
|
|
1780 ;; Thanks to Joe Ilacqua <spike@world.std.com> and others for pointing out
|
|
|
1781 ;; an error that occurs with some encryption programs (e.g., the crypt from
|
|
|
1782 ;; Sun Microsystems, HPUX-8, and BSD) if `args' is `"".' This will allow
|
|
|
1783 ;; nil values and lists of strings for argument.
|
|
|
1784
|
|
|
1785 (let (prog args)
|
|
|
1786
|
|
|
1787 ;; Get the proper program and arguments.
|
|
|
1788 (if decrypt
|
|
|
1789 (setq prog (crypt-get-decoding-program crypt-encryption-type)
|
|
|
1790 args (crypt-get-decoding-args crypt-encryption-type))
|
|
|
1791 (setq prog (crypt-get-encoding-program crypt-encryption-type)
|
|
|
1792 args (crypt-get-encoding-args crypt-encryption-type)))
|
|
|
1793
|
|
|
1794 ;; Check arguments.
|
|
|
1795 (cond
|
|
|
1796
|
|
|
1797 ;; nil or "" args - don't pass.
|
|
|
1798 ((or (not args) (equal "" args))
|
|
|
1799 (call-process-region start end prog t t nil key))
|
|
|
1800
|
|
|
1801 ;; Check if the args are in the form of a list - must use apply.
|
|
|
1802 ((listp args)
|
|
|
1803 (apply 'call-process-region
|
|
|
1804 (append (list start end prog t t nil) args (list key))))
|
|
|
1805
|
|
|
1806 ;; Default - just a non-null string.
|
|
|
1807 (t
|
|
|
1808 (call-process-region start end prog t t nil args key))))))
|
|
|
1809
|
|
|
1810
|
|
|
1811 (defun crypt-encrypt-buffer (key &optional decrypt buffer)
|
|
|
1812
|
|
|
1813 ;; Use KEY to encrypt current buffer and with optional DECRYPT decrypt.
|
|
|
1814 ;; With optional BUFFER, encrypt or decrypt that buffer. Not meant to be
|
|
|
1815 ;; called interactively, toggle `crypt-encrypted-mode' to encrypt an entire
|
|
|
1816 ;; buffer.
|
|
|
1817
|
|
|
1818 (or buffer (setq buffer (current-buffer)))
|
|
|
1819 (save-excursion (set-buffer buffer)
|
|
|
1820 (crypt-encrypt-region (point-min) (point-max) key decrypt)))
|
|
|
1821
|
|
|
1822
|
|
|
1823 ;;;; ENCODING
|
|
|
1824
|
|
|
1825 (defun crypt-encode-region (start end &optional decode)
|
|
|
1826
|
|
|
1827 "Encode region START to END. When called interactively START and END
|
|
|
1828 default to point and mark \(START being the lesser of the two\). With
|
|
|
1829 optional DECODE non-nil, decoding is done.
|
|
|
1830
|
|
|
1831 If encoding is attempted, then checks for correct magic number at start of
|
|
|
1832 newly-encoded region. If not found, then searches and deletes a user-defined
|
|
|
1833 regexp, or executes a user-defined lisp expression, as defined in
|
|
|
1834 `crypt-encoding-alist,' and checks again for magic number."
|
|
|
1835
|
|
|
1836 (interactive "*r\nP")
|
|
|
1837
|
|
|
1838 ;; If called interactively then we may need to determine the encoding type.
|
|
|
1839 (if (and (interactive-p) (not crypt-buffer-encoding-type))
|
|
|
1840 (crypt-read-encoding-type))
|
|
|
1841
|
|
|
1842 (crypt-save-point
|
|
|
1843
|
|
|
1844 ;; We define the PROGRAM as `shell-file-name' and have it call the encoding
|
|
|
1845 ;; or decoding program with the arguments.
|
|
|
1846
|
|
|
1847 (let (prog args)
|
|
|
1848
|
|
|
1849 ;; Get the proper program and arguments.
|
|
|
1850 (if decode
|
|
|
1851 (setq prog (crypt-get-decoding-program crypt-buffer-encoding-type)
|
|
|
1852 args (crypt-get-decoding-args crypt-buffer-encoding-type))
|
|
|
1853 (setq prog (crypt-get-encoding-program crypt-buffer-encoding-type)
|
|
|
1854 args (crypt-get-encoding-args crypt-buffer-encoding-type)))
|
|
|
1855
|
|
|
1856 (cond
|
|
|
1857
|
|
|
1858 ;; prog is a string?
|
|
|
1859 ((stringp prog)
|
|
|
1860
|
|
|
1861 ;; Check arguments.
|
|
|
1862 (cond
|
|
|
1863
|
|
|
1864 ;; Check if the args are in the form of a list, will catch 'nil.
|
|
|
1865 ((listp args)
|
|
|
1866
|
|
|
1867 ;; Cat all the strings together.
|
|
|
1868 (while args
|
|
|
1869 (setq prog (concat prog " " (car args))
|
|
|
1870 args (cdr args))))
|
|
|
1871
|
|
|
1872 ;; Check if a non-null string.
|
|
|
1873 ((and (not (string= "" args))
|
|
|
1874 (not (eq args t))) ; just in case...
|
|
|
1875 (setq prog (concat prog " " args))))
|
|
|
1876
|
|
|
1877 (call-process-region start end shell-file-name t t nil "-c" prog))
|
|
|
1878
|
|
|
1879 ;; Otherwise try and eval it.
|
|
|
1880 (t
|
|
|
1881 (eval (if args
|
|
|
1882 (list prog start end args)
|
|
|
1883 (list prog start end))))))
|
|
|
1884
|
|
|
1885 ;; Encoding or decoding region?
|
|
|
1886 (if (not decode)
|
|
|
1887
|
|
|
1888 ;; Check if encoded region starts with magic number.
|
|
|
1889 (let ((magic (crypt-get-magic-regexp crypt-buffer-encoding-type))
|
|
|
1890 (clean (crypt-get-cleanup-regexp crypt-buffer-encoding-type))
|
|
|
1891 (case-fold-search nil))
|
|
|
1892
|
|
|
1893 ;; Top of region.
|
|
|
1894 (goto-char start)
|
|
|
1895
|
|
|
1896 ;; Check for magic number.
|
|
|
1897 (if (not (looking-at magic))
|
|
|
1898
|
|
|
1899 ;; Magic number not there.
|
|
|
1900
|
|
|
1901 ;; Some compression programs produce an (inane) standard error
|
|
|
1902 ;; message that gets piped into the buffer. For example, some
|
|
|
1903 ;; versions of compact output "Compression : 35.50%." There may
|
|
|
1904 ;; be some way to clean up buffer and check again.
|
|
|
1905
|
|
|
1906 (cond
|
|
|
1907
|
|
|
1908 ;; No mechanism to clean up - failed.
|
|
|
1909 ((eq clean nil)
|
|
|
1910 (error "Encoding failed!"))
|
|
|
1911
|
|
|
1912 ;; Cleanup a regexp string?
|
|
|
1913 ((stringp clean)
|
|
|
1914
|
|
|
1915 ;; Is regexp there?
|
|
|
1916 (if (looking-at clean)
|
|
|
1917
|
|
|
1918 (progn
|
|
|
1919 ;; Delete the match.
|
|
|
1920 (delete-region (match-beginning 0) (match-end 0))
|
|
|
1921
|
|
|
1922 ;; Check for magic again.
|
|
|
1923 (if (not (looking-at magic))
|
|
|
1924 (error "Encoding failed!")))))
|
|
|
1925
|
|
|
1926 ;; Default: evaluate a lisp expression and check again.
|
|
|
1927 (t (eval clean)
|
|
|
1928 (if (not (looking-at magic))
|
|
|
1929 (error "Encoding failed!")))))))))
|
|
|
1930
|
|
|
1931 (defun crypt-encode-buffer (&optional decode buffer)
|
|
|
1932
|
|
|
1933 ;; Encode current buffer. With optional DECODE non-nil decode and optional
|
|
|
1934 ;; BUFFER, encode or decode that buffer. Not meant to be called
|
|
|
1935 ;; interactively, toggle `crypt-encoded-mode' to encode an entire buffer.
|
|
|
1936
|
|
|
1937 (or buffer (setq buffer (current-buffer)))
|
|
|
1938 (save-excursion (set-buffer buffer)
|
|
|
1939 (crypt-encode-region (point-min) (point-max) decode)))
|
|
|
1940
|
|
|
1941
|
|
|
1942 ;;;; DOS <--> UNIX
|
|
|
1943 (defun crypt-dos-to-unix-region (start end)
|
|
|
1944 "Converts region from START to END, from dos to unix format.
|
|
|
1945 Replaces \"\\r\\n\" with \"\\n\" and, if exists, removes ^Z at end of file.
|
|
|
1946 Sets `crypt-dos-has-ctrl-z'."
|
|
|
1947 (save-excursion
|
|
|
1948 (save-restriction
|
|
|
1949 (let ((remove-ctrl-z (equal end (point-max))))
|
|
|
1950 (narrow-to-region start end)
|
|
|
1951 (goto-char (point-min))
|
|
|
1952 (while (search-forward "\r\n" nil t)
|
|
|
1953 (replace-match "\n" nil t))
|
|
|
1954 (if remove-ctrl-z
|
|
|
1955 (progn
|
|
|
1956 (goto-char (1- (point-max)))
|
|
|
1957 (setq crypt-dos-has-ctrl-z (looking-at "\C-z"))
|
|
|
1958 (if crypt-dos-has-ctrl-z (replace-match ""))))))))
|
|
|
1959
|
|
|
1960 (defun crypt-unix-to-dos-region (start end)
|
|
120
|
1961 "Converts region from START to END, from unix to dos format.
|
|
0
|
1962 Replaces \"\\n\" with \"\\r\\n\" and adds a ^Z at end of file if
|
|
|
1963 `crypt-dos-has-ctrl-z' is non-nil."
|
|
|
1964 (save-excursion
|
|
|
1965 (save-restriction
|
|
|
1966 (let ((add-ctrl-z (and crypt-dos-has-ctrl-z
|
|
|
1967 (equal end (point-max)))))
|
|
|
1968 (narrow-to-region start end)
|
|
|
1969 (goto-char (point-min))
|
|
|
1970 (while (search-forward "\n" nil t)
|
|
|
1971 (replace-match "\r\n" nil t))
|
|
|
1972 (if add-ctrl-z
|
|
|
1973 (progn
|
|
|
1974 (goto-char (point-max))
|
|
|
1975 (insert "\C-z")))))))
|
|
|
1976
|
|
|
1977
|
|
|
1978 ;;;; MODES
|
|
|
1979
|
|
|
1980 (defun crypt-encrypted-mode (&optional arg)
|
|
|
1981
|
|
|
1982 "Toggle encrypted mode. With ARG, turn on iff positive, otherwise turn off.
|
|
|
1983 minor mode in which buffers are automatically encrypted before being written.
|
|
|
1984 if toggled and a key has been set for the current buffer, then the current
|
|
|
1985 buffer is marked modified, since it needs to be rewritten with or without
|
|
|
1986 encryption.
|
|
|
1987
|
|
|
1988 Entering encrypted mode causes auto-saving to be turned off in the current
|
|
|
1989 buffer, as there is no way in Emacs Lisp to force auto save files to be
|
|
|
1990 encrypted."
|
|
|
1991
|
|
|
1992 (interactive "P")
|
|
|
1993 (let ((oldval crypt-buffer-save-encrypted))
|
|
|
1994 (setq crypt-buffer-save-encrypted
|
|
|
1995 (if arg (> arg 0) (not crypt-buffer-save-encrypted)))
|
|
|
1996
|
|
|
1997 (if crypt-buffer-save-encrypted
|
|
|
1998 ;; We are going to save as encrypted, we will turn off auto-saving.
|
|
|
1999 (progn
|
|
|
2000 ;; NEVER do this. Turning off auto-saving is one thing. But if there's
|
|
|
2001 ;; already an autosave for some other reason, what business does this
|
|
|
2002 ;; package have tampering with it?
|
|
|
2003 ; ;; If an auto-save file already exists, then delete it.
|
|
|
2004 ; (if (and (stringp buffer-auto-save-file-name)
|
|
|
2005 ; (file-exists-p buffer-auto-save-file-name))
|
|
|
2006 ; (delete-file buffer-auto-save-file-name))
|
|
|
2007 ;; If the key is not set then ask for it.
|
|
|
2008 (if (not crypt-buffer-encryption-key)
|
|
|
2009 (call-interactively 'crypt-set-encryption-key))
|
|
|
2010 ;; Turn-off auto-saving if crypt-encrypted-disable-auto-save non-nil.
|
|
|
2011 (and crypt-encrypted-disable-auto-save
|
|
|
2012 auto-save-default
|
|
|
2013 (progn
|
|
|
2014 (auto-save-mode 0)
|
|
|
2015 (if (eq crypt-encrypted-disable-auto-save t)
|
|
|
2016 (message "Auto-save off (in this buffer)")))))
|
|
|
2017
|
|
|
2018 ;; We are not going to save as encrypted, we will turn on auto-saving
|
|
|
2019 ;; but only if we are editing a file and the default says we should.
|
|
|
2020 (auto-save-mode (if (and auto-save-default buffer-file-name) 1 0)))
|
|
|
2021
|
|
|
2022 (if crypt-buffer-encryption-key
|
|
|
2023 ;; Set buffer-modified flag to t only if the mode has been changed,
|
|
|
2024 ;; old code set unconditionally to nil if mode was not changed .
|
|
|
2025 ;; Modification suggested by: Gerd Hillebrand <ggh@cs.brown.edu>
|
|
|
2026 (if (not (eq oldval crypt-buffer-save-encrypted))
|
|
|
2027 (set-buffer-modified-p t)))))
|
|
|
2028
|
|
|
2029
|
|
|
2030 ;;; Forgetting encryption keys (by jwz)
|
|
|
2031 ;;; This is really kind of bogus. Good behavior would be:
|
|
|
2032 ;;; - If a crypted buffer has not been "accessed" (edited? selected?
|
|
|
2033 ;;; viewed?) in N minutes, kill the buffer (since the plaintext is valuable.)
|
|
|
2034 ;;; - If a crypted buffer is modified, but "idle", just forget the password
|
|
|
2035 ;;; instead of killing the buffer (though the plaintext is valuable, it's
|
|
|
2036 ;;; also unsaved...)
|
|
|
2037 ;;; - The "idleness" of a modified buffer should be reset with every mod, so
|
|
|
2038 ;;; that an unsaved buffer that you have been constantly typing at for an
|
|
|
2039 ;;; hour doesn't lose its password.
|
|
|
2040 ;;; - But, if a password for a buffer has been discarded, and then an attempt
|
|
|
2041 ;;; is made to save that buffer, then we should confirm that the newly-
|
|
|
2042 ;;; typed password is the same as the password used in the file on disk.
|
|
|
2043 ;;; with PGP, we could check that by attempting to decrypt the file on
|
|
|
2044 ;;; disk into a scratch buffer and seeing if it contains the PGP error
|
|
|
2045 ;;; message.
|
|
|
2046 ;;; - BUG: if a password has been forgotten, and you save, and are prompted,
|
|
|
2047 ;;; the old file has already been renamed to a backup!! so if you ^G, the
|
|
|
2048 ;;; real file name no longer exists on disk - only as a ~ file.
|
|
|
2049
|
|
|
2050 (defun crypt-forget-encryption-key ()
|
|
|
2051 (cond (crypt-buffer-encryption-key
|
|
|
2052 (let ((inhibit-quit t))
|
|
|
2053 (fillarray crypt-buffer-encryption-key 0)
|
|
|
2054 (setq crypt-buffer-encryption-key nil))
|
|
|
2055 t)
|
|
|
2056 (t nil)))
|
|
|
2057
|
|
|
2058 (add-hook 'kill-buffer-hook 'crypt-forget-encryption-key)
|
|
|
2059
|
|
120
|
2060 (defcustom crypt-forget-passwd-timeout (* 60 60)
|
|
0
|
2061 "*Do not retain passwords for encrypted buffers more than this many seconds.
|
|
120
|
2062 If nil, keep them indefinitely."
|
|
|
2063 :type '(choice integer (const :tag "indefinite" nil))
|
|
|
2064 :group 'crypt)
|
|
0
|
2065
|
|
|
2066 (defun crypt-reset-passwd-timer ()
|
|
|
2067 (if (fboundp 'get-itimer) ; XEmacs, or anything with itimer.el loaded.
|
|
|
2068 (let ((name "crypt-forget-passwds"))
|
|
|
2069 (if (get-itimer name)
|
|
|
2070 (delete-itimer name))
|
|
|
2071 (if crypt-forget-passwd-timeout
|
|
|
2072 (start-itimer name
|
|
|
2073 'crypt-reset-passwds-timeout
|
|
|
2074 crypt-forget-passwd-timeout)))))
|
|
|
2075
|
|
|
2076 (defun crypt-reset-passwds-timeout ()
|
|
|
2077 ;; run by the timer code to forget all passwords
|
|
|
2078 (let ((buffers (buffer-list))
|
|
|
2079 (inhibit-quit t)
|
|
|
2080 (keep-going nil))
|
|
|
2081 (while buffers
|
|
|
2082 (save-excursion
|
|
|
2083 (set-buffer (car buffers))
|
|
|
2084 (cond ((and crypt-buffer-encryption-key
|
|
|
2085 (buffer-modified-p))
|
|
|
2086 ;; don't forget the password in modified buffers, but
|
|
|
2087 ;; do check again later (maybe it will be unmodified.)
|
|
|
2088 (setq keep-going t))
|
|
|
2089 (crypt-buffer-encryption-key
|
|
|
2090 ;; forget the password in unmodified buffers.
|
|
|
2091 (crypt-forget-encryption-key)
|
|
|
2092 ;; Mark the buffer read only so that it's not accidentally
|
|
|
2093 ;; edited; the smart thing to do is revert it, type the
|
|
|
2094 ;; encryption key (to make sure they same key is used)
|
|
|
2095 ;; and then edit it.
|
|
|
2096 (setq buffer-read-only t)
|
|
|
2097 (message "Password discarded in buffer %s"
|
|
|
2098 (buffer-name (car buffers))))
|
|
|
2099 ))
|
|
|
2100 (setq buffers (cdr buffers)))
|
|
|
2101 (if keep-going
|
|
|
2102 (crypt-reset-passwd-timer))
|
|
|
2103 nil))
|
|
|
2104
|
|
|
2105
|
|
|
2106 ;;; Originally `tek-symbol-alist-to-table' from tek-highlight.el.
|
|
|
2107 (defun crypt-symbol-alist-to-table (list)
|
|
|
2108 ;; Converts an alist of symbols to a table suitable for `completing-read.'
|
|
|
2109 ;; Called by `crypt-read-encoding-type'
|
|
|
2110 (mapcar (function (lambda (x) (list (symbol-name (car x)))))
|
|
|
2111 list))
|
|
|
2112
|
|
|
2113 (defun crypt-read-encoding-type ()
|
|
|
2114
|
|
|
2115 ;; Function called to query user for `crypt-buffer-encoding-type' uses
|
|
|
2116 ;; contents of `crypt-encoding-alist' and `crypt-default-encoding.'
|
|
|
2117
|
|
|
2118 ;; Use poor man's gmhist (i.e., we could have used gmhist's
|
|
|
2119 ;; `completing-read-with-history-in' instead).
|
|
|
2120 (let (
|
|
|
2121 ;; Find the encoding type desired by user.
|
|
|
2122 (type
|
|
|
2123 (completing-read
|
|
|
2124 (concat "encoding type (? for list): [" crypt-default-encoding "] ")
|
|
|
2125 (crypt-symbol-alist-to-table crypt-encoding-alist))))
|
|
|
2126
|
|
|
2127 ;; Test length of object returned by `completing-read'.
|
|
|
2128 (if (zerop (length type))
|
|
|
2129
|
|
|
2130 ;; Nothing there, i.e., user hit return -- use default.
|
|
|
2131 (setq crypt-buffer-encoding-type (intern crypt-default-encoding))
|
|
|
2132
|
|
|
2133 ;; Use the value from mini-buffer and update the default value.
|
|
|
2134 (setq crypt-buffer-encoding-type (intern type)
|
|
|
2135 crypt-default-encoding type))))
|
|
|
2136
|
|
|
2137 (defun crypt-encoded-mode (&optional arg)
|
|
|
2138
|
|
|
2139 "Toggle encoded mode. With ARG, turn on iff positive, otherwise turn off.
|
|
|
2140 minor mode in which buffers are automatically encoded before being written. if
|
|
|
2141 toggled then current buffer is marked modified, since it needs to be written
|
|
|
2142 with or without encoding.
|
|
|
2143
|
|
|
2144 Entering encoded mode causes auto-saving to be turned off in the current
|
|
|
2145 buffer, as there is no way in Emacs Lisp to force auto save files to be
|
|
|
2146 encoded."
|
|
|
2147
|
|
|
2148 (interactive "P")
|
|
|
2149
|
|
|
2150 ;; Set flag indicating whether or not `(crypt-encoded-mode)' was called
|
|
|
2151 ;; interactively.
|
|
|
2152 (setq crypt-buffer-interactive-encoded-mode (interactive-p))
|
|
|
2153
|
|
|
2154 ;; If called interactively then need to determine encoding type.
|
|
|
2155 (if (and crypt-buffer-interactive-encoded-mode
|
|
|
2156 (not crypt-buffer-encoding-type))
|
|
|
2157 (crypt-read-encoding-type))
|
|
|
2158
|
|
|
2159 ;; Save old value of `crypt-buffer-save-encoded'.
|
|
|
2160 (let ((oldval crypt-buffer-save-encoded))
|
|
|
2161
|
|
|
2162 ;; Set the variable `crypt-buffer-save-encoded' to t if the argument is
|
|
|
2163 ;; positive, otherwise toggle its current value.
|
|
|
2164 (setq crypt-buffer-save-encoded
|
|
|
2165 (if arg (> arg 0) (not crypt-buffer-save-encoded)))
|
|
|
2166
|
|
|
2167 ;; Set the variable generated by `(crypt-buffer-save-name)' to the value
|
|
|
2168 ;; stored in `crypt-buffer-save-encoded.'
|
|
|
2169 (set-variable (crypt-buffer-save-name crypt-buffer-encoding-type)
|
|
|
2170 crypt-buffer-save-encoded)
|
|
|
2171
|
|
|
2172 (if crypt-buffer-save-encoded
|
|
|
2173 ;; We are going to save as encoded, we might turn off auto-saving.
|
|
|
2174 (progn
|
|
|
2175 ;; NEVER do this. Turning off auto-saving is one thing. But if there's
|
|
|
2176 ;; already an autosave for some other reason, what business does this
|
|
|
2177 ;; package have tampering with it?
|
|
|
2178 ; ;; If an auto-save file already exists, then delete it.
|
|
|
2179 ; (if (and (stringp buffer-auto-save-file-name)
|
|
|
2180 ; (file-exists-p buffer-auto-save-file-name))
|
|
|
2181 ; (delete-file buffer-auto-save-file-name))
|
|
|
2182 ;; Turn-off auto-saving if crypt-encoded-disable-auto-save non-nil.
|
|
|
2183 (and crypt-encoded-disable-auto-save
|
|
|
2184 auto-save-default
|
|
|
2185 (progn
|
|
|
2186 (auto-save-mode 0)
|
|
|
2187 (if (eq crypt-encoded-disable-auto-save t)
|
|
|
2188 (message "Auto-save off (in this buffer)")))))
|
|
|
2189
|
|
|
2190 ;; We are not going to save as encoded, we will turn on auto-saving but
|
|
|
2191 ;; only if we are editing a file and the default says we should.
|
|
|
2192 (auto-save-mode (if (and auto-save-default buffer-file-name) 1 0)))
|
|
|
2193
|
|
|
2194 ;; Have we toggled the mode?
|
|
|
2195
|
|
|
2196 ;; If yes, then mark buffer as modified. If not, then leave
|
|
|
2197 ;; buffer-modified flag alone.
|
|
|
2198
|
|
|
2199 ;; The old code previously set the variable `set-buffer-modified-p' to a
|
|
|
2200 ;; value of t if there was a mode change and (unconditionally) to nil
|
|
|
2201 ;; if there was not a mode change.
|
|
|
2202
|
|
|
2203 ;; Modification suggested by: Gerd Hillebrand <ggh@cs.brown.edu>.
|
|
|
2204
|
|
|
2205 (if (not (eq oldval crypt-buffer-save-encoded))
|
|
|
2206 (set-buffer-modified-p t))))
|
|
|
2207
|
|
|
2208
|
|
|
2209 ;;;; Additional encryption functions
|
|
|
2210
|
|
|
2211 ;; For Emacs V18 compatibility
|
|
|
2212 (and (not (fboundp 'buffer-disable-undo))
|
|
|
2213 (fboundp 'buffer-flush-undo)
|
|
|
2214 (fset 'buffer-disable-undo 'buffer-flush-undo))
|
|
|
2215
|
|
|
2216 (fset 'crypt-read-string-no-echo 'read-passwd)
|
|
|
2217
|
|
|
2218 ;(defun crypt-read-string-no-echo (prompt &optional confirm)
|
|
|
2219 ;
|
|
|
2220 ; ;; Read a string from minibuffer, prompting with PROMPT, echoing periods.
|
|
|
2221 ; ;; Optional second argument CONFIRM non-nil means that the user will be
|
|
|
2222 ; ;; asked to type the string a second time for confirmation and if there is a
|
|
|
2223 ; ;; mismatch, the whole process is repeated.
|
|
|
2224 ; ;;
|
|
|
2225 ; ;; Line editing keys are --
|
|
|
2226 ; ;; C-h, DEL rubout
|
|
|
2227 ; ;; C-u, C-x line kill
|
|
|
2228 ; ;; C-q, C-v literal next
|
|
|
2229 ;
|
|
|
2230 ; (catch 'return-value
|
|
|
2231 ; (save-excursion
|
|
|
2232 ;
|
|
|
2233 ; (let ((input-buffer (get-buffer-create (make-temp-name " *password*")))
|
|
|
2234 ; char hold-password help-form kill-ring)
|
|
|
2235 ;
|
|
|
2236 ; (set-buffer input-buffer)
|
|
|
2237 ; ;; Don't add to undo ring.
|
|
|
2238 ; (buffer-disable-undo input-buffer)
|
|
|
2239 ;
|
|
|
2240 ; (let ((cursor-in-echo-area t)
|
|
|
2241 ; (echo-keystrokes 0))
|
|
|
2242 ;
|
|
|
2243 ; (unwind-protect
|
|
|
2244 ;
|
|
|
2245 ; ;; BODYFORM
|
|
|
2246 ; ;; Repeat until we get a `throw'.
|
|
|
2247 ; (while t
|
|
|
2248 ; (erase-buffer)
|
|
|
2249 ; (message prompt)
|
|
|
2250 ;
|
|
|
2251 ; ;; Read string.
|
|
|
2252 ; (while (not (memq (setq char (read-char)) '(?\C-m ?\C-j)))
|
|
|
2253 ; (if (setq help-form
|
|
|
2254 ; (cdr
|
|
|
2255 ; (assq char
|
|
|
2256 ; '((?\C-h . (delete-char -1))
|
|
|
2257 ; (?\C-? . (delete-char -1))
|
|
|
2258 ; (?\C-u . (delete-region 1 (point)))
|
|
|
2259 ; (?\C-x . (delete-region 1 (point)))
|
|
|
2260 ; (?\C-q . (quoted-insert 1))
|
|
|
2261 ; (?\C-v . (quoted-insert 1))))))
|
|
|
2262 ; (condition-case error-data
|
|
|
2263 ; (eval help-form)
|
|
|
2264 ; (error t))
|
|
|
2265 ; ;; Just a plain character - insert into password buffer.
|
|
|
2266 ; (insert char))
|
|
|
2267 ;
|
|
|
2268 ; ;; I think crypt-read-string-no-echo should echo asterisks.
|
|
|
2269 ; ;; -- Jamie. How about periods like in ange-ftp? -- lrd
|
|
|
2270 ; ;;
|
|
|
2271 ; (message "%s%s" prompt (make-string (buffer-size) ?.)))
|
|
|
2272 ;
|
|
|
2273 ; ;; Do we have to confirm password?
|
|
|
2274 ; (cond
|
|
|
2275 ;
|
|
|
2276 ; ;; No confirmation requested - terminate.
|
|
|
2277 ; ((not confirm)
|
|
|
2278 ; (throw 'return-value (buffer-string)))
|
|
|
2279 ;
|
|
|
2280 ; ;; Can we compare (confirm) password values yet?
|
|
|
2281 ; (hold-password
|
|
|
2282 ; (if (string= hold-password (buffer-string))
|
|
|
2283 ; ;; The two passwords match - terminate.
|
|
|
2284 ; (throw 'return-value hold-password)
|
|
|
2285 ;
|
|
|
2286 ; ;; Mismatch - start over.
|
|
|
2287 ; (progn
|
|
|
2288 ; (message (concat prompt "[Mismatch. Start over]"))
|
|
|
2289 ; (beep)
|
|
|
2290 ; (sit-for 2)
|
|
|
2291 ; (fillarray hold-password 0) ; destroy extra copy now
|
|
|
2292 ; (setq hold-password nil))))
|
|
|
2293 ;
|
|
|
2294 ; ;; Store password and read again.
|
|
|
2295 ; (t
|
|
|
2296 ; (setq hold-password (buffer-string))
|
|
|
2297 ; (message (concat prompt "[Retype to confirm]"))
|
|
|
2298 ; (sit-for 2))))
|
|
|
2299 ;
|
|
|
2300 ; ;; UNWINDFORMS
|
|
|
2301 ; ;; Clean up.
|
|
|
2302 ; (set-buffer input-buffer)
|
|
|
2303 ; (set-buffer-modified-p nil)
|
|
|
2304 ; (buffer-disable-undo input-buffer) ; redundant, but why not be safe.
|
|
|
2305 ; (widen)
|
|
|
2306 ; (goto-char (point-min))
|
|
|
2307 ; (while (not (eobp)) (delete-char 1) (insert "*")) ; destroy now
|
|
|
2308 ; (kill-buffer input-buffer)))))))
|
|
|
2309
|
|
|
2310 (defun crypt-set-encryption-key (key &optional buffer)
|
|
|
2311
|
|
|
2312 "Set the encryption KEY, a string, for current buffer or optionally BUFFER.
|
|
|
2313 If buffer is in encrypted mode, then it is also marked as modified, since it
|
|
|
2314 needs to be saved with the new key."
|
|
|
2315
|
|
|
2316 (interactive
|
|
|
2317 (progn
|
|
|
2318 (barf-if-buffer-read-only)
|
|
|
2319 (list (crypt-read-string-no-echo
|
|
|
2320 (format "Encryption key for %s? [RET to ignore]: " (buffer-name))
|
|
|
2321 crypt-confirm-password))))
|
|
|
2322
|
|
|
2323 ;; For security reasons we remove `(crypt-set-encryption-key "password")'
|
|
|
2324 ;; from the `command-history' list if called interactively.
|
|
|
2325 (if (interactive-p)
|
|
|
2326 (setq command-history (cdr command-history)))
|
|
|
2327
|
|
|
2328 (or buffer (setq buffer (current-buffer)))
|
|
|
2329
|
|
|
2330 (save-excursion
|
|
|
2331 (set-buffer buffer)
|
|
|
2332 (if (equal key crypt-buffer-encryption-key)
|
|
|
2333 (message "Key is identical to original, no change.")
|
|
|
2334
|
|
|
2335 (progn
|
|
|
2336 ;; jwz: destroy old string
|
|
|
2337 (if (and crypt-buffer-encryption-key
|
|
|
2338 (not (eq crypt-buffer-encryption-key key)))
|
|
|
2339 (fillarray crypt-buffer-encryption-key 0))
|
|
|
2340 (setq crypt-buffer-encryption-key key)
|
|
|
2341
|
|
|
2342 ;; Don't touch the modify flag unless we're in `(crypt-encrypted-mode)'.
|
|
|
2343 (if crypt-buffer-save-encrypted
|
|
|
2344 (set-buffer-modified-p t))
|
|
|
2345
|
|
|
2346 (crypt-reset-passwd-timer)
|
|
|
2347 ))))
|
|
|
2348
|
|
|
2349
|
|
|
2350 ;;;; Install hooks and mode indicators.
|
|
|
2351
|
|
|
2352 ;;; Check if mode indicators are not already installed and then prepend them.
|
|
|
2353 (and (not (assq 'crypt-buffer-save-encrypted minor-mode-alist))
|
|
|
2354 (setq minor-mode-alist (append crypt-minor-mode-alist minor-mode-alist)))
|
|
|
2355
|
|
|
2356 ;;; Install the hooks.
|
|
|
2357
|
|
|
2358 ;;; If add-hook isn't already defined overwrite it with our own.
|
|
|
2359 ;;; Note the `add-hook' function must take the optional APPEND argument.
|
|
|
2360 (if (not (fboundp 'add-hook))
|
|
|
2361 ;; No add-hook found.
|
|
|
2362 ;; Use `add-hook' from GNU Emacs v19.
|
|
|
2363 (defun add-hook (hook function &optional append)
|
|
|
2364 "Add to the value of HOOK the function FUNCTION.
|
|
|
2365 FUNCTION is not added if already present.
|
|
|
2366 FUNCTION is added (if necessary) at the beginning of the hook list
|
|
|
2367 unless the optional argument APPEND is non-nil, in which case
|
|
|
2368 FUNCTION is added at the end.
|
|
|
2369
|
|
|
2370 HOOK should be a symbol, and FUNCTION may be any valid function. If
|
|
|
2371 HOOK is void, it is first set to nil. If HOOK's value is a single
|
|
|
2372 function, it is changed to a list of functions."
|
|
|
2373 (or (boundp hook) (set hook nil))
|
|
|
2374 ;; If the hook value is a single function, turn it into a list.
|
|
|
2375 (let ((old (symbol-value hook)))
|
|
|
2376 (if (or (not (listp old)) (eq (car old) 'lambda))
|
|
|
2377 (set hook (list old))))
|
|
|
2378 (or (if (consp function)
|
|
|
2379 ;; Clever way to tell whether a given lambda-expression
|
|
|
2380 ;; is equal to anything in the hook.
|
|
|
2381 (let ((tail (assoc (cdr function) (symbol-value hook))))
|
|
|
2382 (equal function tail))
|
|
|
2383 (memq function (symbol-value hook)))
|
|
|
2384 (set hook
|
|
|
2385 (if append
|
|
|
2386 (nconc (symbol-value hook) (list function))
|
|
|
2387 (cons function (symbol-value hook)))))))
|
|
|
2388
|
|
|
2389 ;;; Attach ourselves to the find-file-hooks and find-file-not-found-hooks.
|
|
|
2390 (add-hook 'find-file-hooks 'crypt-find-file-hook)
|
|
|
2391 (add-hook 'find-file-not-found-hooks 'crypt-find-file-hook)
|
|
|
2392
|
|
|
2393 ;; Take care when appending to write-file-hook. User's version of add-hook
|
|
|
2394 ;; may not have APPEND option. If it fails then do it by hand. I wish
|
|
|
2395 ;; everyone would upgrade - lrd 8/31/93.
|
|
|
2396 (condition-case err
|
|
|
2397 (add-hook 'write-file-hooks 'crypt-write-file-hook t) ; *must* append this
|
|
|
2398 (error
|
|
|
2399 ;; Do it by hand. Not as robust as `add-hook'.
|
|
|
2400
|
|
|
2401 ;; Contributed by Ken Laprade <laprade@trantor.harris-atd.com>
|
|
|
2402 ;; Really should use some sort of add-hook - 16 Feb 93 - KCL
|
|
|
2403 (or (and (listp write-file-hooks) (not (eq (car write-file-hooks) 'lambda)))
|
|
|
2404 (setq write-file-hooks (list write-file-hooks)))
|
|
|
2405
|
|
|
2406 (cond
|
|
|
2407 ((not (memq 'crypt-write-file-hook write-file-hooks))
|
|
|
2408 ;; make this hook last on purpose
|
|
|
2409 (setq write-file-hooks (append write-file-hooks
|
|
|
2410 (list 'crypt-write-file-hook)))))))
|
|
|
2411
|
|
|
2412 ;; In order that the tables and key-binding correctly reflect user's
|
|
|
2413 ;; preferences we add ourselves to the `after-init-hook' GNU Emacs v19 and
|
|
|
2414 ;; Lucid Emacs v 19.8 (or later) or `term-setup-hook' in Lucid Emacs v 19.7
|
|
|
2415 ;; (or earlier). These are run *after* ~/.emacs and ../lisp/default.el are
|
|
|
2416 ;; loaded. Unfortunately, v18 does not have `after-init-hook' and
|
|
|
2417 ;; `term-setup-hook' is just a single function. It is a bit of a pain trying
|
|
|
2418 ;; to work our functions in properly without overwriting the user's value.
|
|
|
2419 ;; Therefore, we do nothing and hope they upgrade to v19 soon.
|
|
|
2420
|
|
|
2421 (cond ((boundp 'after-init-hook)
|
|
|
2422 ;; Must be running GNU Emacs v19 :->
|
|
|
2423 (add-hook 'after-init-hook 'crypt-rebuild-tables)
|
|
|
2424 (add-hook 'after-init-hook 'crypt-rebuild-minor-modes-alist)
|
|
|
2425 (add-hook 'after-init-hook 'crypt-bind-insert-file))
|
|
|
2426
|
|
|
2427 ((and (string-match "^19" emacs-version) t)
|
|
|
2428 ;; Probably running Lucid Emacs v19.7 (or earlier) since it,
|
|
|
2429 ;; unfortunately, does not have `after-init-hook'. Use
|
|
|
2430 ;; `term-setup-hook' instead and hope they upgrade to Lucid 19.8 or GNU
|
|
|
2431 ;; Emacs 19.
|
|
|
2432 (add-hook 'term-setup-hook 'crypt-rebuild-tables)
|
|
|
2433 (add-hook 'term-setup-hook 'crypt-rebuild-minor-modes-alist)
|
|
|
2434 (add-hook 'term-setup-hook 'crypt-bind-insert-file)))
|
|
|
2435
|
|
|
2436
|
|
|
2437 ;;; Code for conditionally decoding/decrypting an inserted file
|
|
|
2438
|
|
120
|
2439 (defcustom crypt-bind-insert-file t
|
|
0
|
2440 "*t value means bind `crypt-insert-file' over `insert-file'.
|
|
|
2441 If you wish to change this variable after crypt++ has been loaded then do
|
|
120
|
2442 \\[crypt-bind-insert-file]."
|
|
|
2443 :type 'boolean
|
|
|
2444 :group 'crypt)
|
|
0
|
2445
|
|
120
|
2446 (defcustom crypt-auto-decode-insert nil
|
|
0
|
2447 "*t says decode/decrypt files that are inserted with `crypt-insert-file'.
|
|
120
|
2448 nil says to ask before doing this."
|
|
|
2449 :type 'boolean
|
|
|
2450 :group 'crypt)
|
|
0
|
2451
|
|
|
2452 ;;; Bind `crypt-insert-file' over wherever `insert-file' is bound?
|
|
|
2453 (defun crypt-bind-insert-file ()
|
|
|
2454
|
|
|
2455 "Bind `crypt-insert-file' in place of `insert-file' or reverse based on
|
|
|
2456 `crypt-bind-insert-file'. Part of `after-init-hook'."
|
|
|
2457
|
|
|
2458 (interactive)
|
|
|
2459
|
|
|
2460 (if (interactive-p)
|
|
|
2461 (setq crypt-bind-insert-file
|
|
|
2462 (y-or-n-p "Bind crypt-insert-file over insert-file? ")))
|
|
|
2463
|
|
|
2464 (if crypt-bind-insert-file
|
|
|
2465 (substitute-key-definition
|
|
|
2466 'insert-file 'crypt-insert-file (current-global-map))
|
|
|
2467 (substitute-key-definition
|
|
|
2468 'crypt-insert-file 'insert-file (current-global-map))))
|
|
|
2469
|
|
|
2470 ;;; Now call it.
|
|
|
2471 (crypt-bind-insert-file)
|
|
|
2472
|
|
|
2473 ;;; crypt++ replacement for `insert-file'
|
|
|
2474 (defun crypt-insert-file (filename)
|
|
|
2475 "Insert decoded/decrypted contents of file FILENAME into buffer after point.
|
|
|
2476 Set mark after the inserted text.
|
|
|
2477
|
|
|
2478 This function is meant for the user to run interactively.
|
|
|
2479 Don't call it from programs! Use `insert-file-contents' instead.
|
|
|
2480 \(Its calling sequence is different; see its documentation\).
|
|
|
2481
|
|
|
2482 This version will attempt to decrypt and/or decode file before inserting.
|
|
|
2483 see variable `crypt-auto-decode-insert'."
|
|
|
2484 (interactive "fInsert file: ")
|
|
|
2485 (if (file-directory-p filename)
|
|
|
2486 (signal 'file-error (list "Opening input file" "file is a directory"
|
|
|
2487 filename)))
|
|
|
2488 (let ((tem (crypt-insert-file-contents filename))) ; use crypt++ to insert
|
|
|
2489 (push-mark (+ (point) (car (cdr tem))))))
|
|
|
2490
|
|
|
2491 (defun crypt-insert-file-contents (file)
|
|
|
2492
|
|
|
2493 ;; Similar to `insert-file-contents' except decoding/decrypting of FILE
|
|
|
2494 ;; attempted. See `crypt-insert-file' and `crypt-auto-decode-insert'
|
|
|
2495
|
|
|
2496 (let (temp-buffer
|
|
|
2497 temp-list
|
|
|
2498 (crypt-auto-decode-buffer crypt-auto-decode-insert)
|
|
|
2499 (orig-buffer (current-buffer)))
|
|
|
2500
|
|
|
2501 ;; Create a temporary buffer and decode and decrypt it.
|
|
|
2502 (save-excursion
|
|
|
2503
|
|
|
2504 ;; Temporary buffer, use the same name as the file to be inserted.
|
|
|
2505 (setq temp-buffer (generate-new-buffer (file-name-nondirectory file)))
|
|
|
2506 (set-buffer temp-buffer)
|
|
|
2507
|
|
|
2508 ;; Original insert-file-contents - save list.
|
|
|
2509 (setq temp-list (insert-file-contents file nil))
|
|
|
2510
|
|
|
2511 ;; Make temp-buffer unmodified.
|
|
|
2512 (set-buffer-modified-p nil)
|
|
|
2513
|
|
|
2514 ;; Need to set buffer name to file name for crypt++.
|
|
|
2515 (setq buffer-file-name file)
|
|
|
2516
|
|
|
2517 ;; Decode and decrypt, if necessary.
|
|
|
2518 (crypt-find-file-hook)
|
|
|
2519
|
|
|
2520 ;; Find the length of the file to be inserted. `insert-file-contents'
|
|
|
2521 ;; returns it for the original encoded/encrypted file.
|
|
|
2522 (setcdr temp-list (cons (buffer-size) ()))
|
|
|
2523
|
|
|
2524 ;; Now insert temp-buffer into original buffer.
|
|
|
2525 (set-buffer orig-buffer)
|
|
|
2526 (insert-buffer temp-buffer)
|
|
|
2527
|
|
|
2528 ;; Kill the temporary buffer.
|
|
|
2529 (kill-buffer temp-buffer))
|
|
|
2530
|
|
|
2531 ;; Return modified list from `insert-file-contents'.
|
|
|
2532 temp-list))
|
|
|
2533
|
|
|
2534
|
|
|
2535 ;;;; BUG REPORTS
|
|
|
2536
|
|
|
2537 ;;; This section is provided for reports.
|
|
|
2538 ;;; Using Barry A. Warsaw's reporter.el
|
|
|
2539
|
|
|
2540 (defconst crypt-version "2.82"
|
|
|
2541 "Revision number of crypt++.el -- handles compressed and encrypted files.
|
|
|
2542 Type \\[crypt-submit-report] to send a bug report. Available via anonymous
|
|
|
2543 ftp in
|
|
|
2544
|
|
|
2545 /roebling.poly.edu:/pub/lisp/crypt++.el.gz
|
|
|
2546 /archive.cis.ohio-state.edu:/pub/gnu/emacs/elisp-archive/misc/crypt++.el.Z")
|
|
|
2547
|
|
|
2548 (defconst crypt-help-address
|
|
|
2549 "dodd@roebling.poly.edu"
|
|
|
2550 "Address(es) accepting submission of reports on crypt++.el.")
|
|
|
2551
|
|
|
2552 (defconst crypt-maintainer "Larry"
|
|
|
2553 "First name(s) of people accepting submission of reports on crypt++.el.")
|
|
|
2554
|
|
|
2555 (defconst crypt-file "crypt++.el"
|
|
|
2556 "Name of file containing emacs lisp code.")
|
|
|
2557
|
|
|
2558 (defconst crypt-variable-list
|
|
|
2559 (list 'shell-file-name ; These
|
|
|
2560 'load-path ; are
|
|
|
2561 'exec-path ; useful.
|
|
|
2562 'crypt-encryption-type
|
|
|
2563 'crypt-encryption-file-extension
|
|
|
2564 'crypt-never-ever-decrypt
|
|
|
2565 'crypt-auto-write-buffer-encrypted
|
|
|
2566 'crypt-confirm-password
|
|
|
2567 'crypt-encrypted-disable-auto-save
|
|
|
2568 'crypt-auto-decode-buffer
|
|
|
2569 'crypt-auto-write-buffer
|
|
|
2570 'crypt-query-if-interactive
|
|
|
2571 'crypt-no-extension-implies-plain
|
|
|
2572 'crypt-freeze-vs-fortran
|
|
|
2573 'crypt-compact-vs-C++
|
|
|
2574 'crypt-ignored-filenames
|
|
|
2575 'crypt-default-encoding
|
|
|
2576 'crypt-encoded-disable-auto-save
|
|
|
2577 'crypt-bind-insert-file
|
|
|
2578 'crypt-auto-decode-insert
|
|
|
2579 'crypt-encoding-alist
|
|
|
2580 'crypt-encryption-alist
|
|
|
2581 )
|
|
|
2582 "List of variables to be appended to reports sent by `crypt-submit-report.'")
|
|
|
2583
|
|
|
2584 (defun crypt-submit-report ()
|
|
|
2585 "Submit via reporter.el a bug report on program. Send report on `crypt-file'
|
|
|
2586 version `crypt-version,' to `crypt-maintainer' at address `crypt-help-address'
|
|
|
2587 listing variables `crypt-variable-list' in the message."
|
|
|
2588 (interactive)
|
|
|
2589
|
|
|
2590 ;; In case we can't find reporter...
|
|
|
2591 (condition-case err
|
|
|
2592 (progn
|
|
|
2593 ;; Get it if we can.
|
|
|
2594 (require 'reporter)
|
|
|
2595
|
|
|
2596 (reporter-submit-bug-report
|
|
|
2597 crypt-help-address ; address
|
|
|
2598 (concat crypt-file " " crypt-version) ; pkgname
|
|
|
2599 crypt-variable-list ; varlist
|
|
|
2600 nil nil ; pre-hooks and post-hooks
|
|
|
2601 (concat "Yo! " crypt-maintainer ","))) ; salutation
|
|
|
2602
|
|
|
2603 ;; ...fail gracefully.
|
|
|
2604 (error
|
|
|
2605 (beep)
|
|
|
2606
|
|
|
2607 ;; Do they have ange-ftp?
|
|
|
2608 (if (and (featurep 'ange-ftp)
|
|
|
2609 (y-or-n-p (concat "Sorry, reporter.el not found. "
|
|
|
2610 "Can I ange-ftp it for you? ")))
|
|
|
2611
|
|
|
2612 ;; Yes. Then Ange-ftp a copy from roebling.
|
|
|
2613 (let ((ange-ftp-generate-anonymous-password t))
|
|
|
2614 ;; Might want to use the elisp archive official site? But
|
|
|
2615 ;; then it would have to be uncompressed, etc. Ick!
|
|
|
2616 (find-file-other-window
|
|
|
2617 "/anonymous@roebling.poly.edu:/pub/reporter.el")
|
|
|
2618 (eval-current-buffer)
|
|
|
2619 (message (concat "Save reporter.el somewhere in `load-path' "
|
|
|
2620 "and try again.")))
|
|
|
2621
|
|
|
2622 ;; No ange-ftp.
|
|
|
2623 (message "Sorry, reporter.el not found.")
|
|
|
2624 (sit-for 3)
|
|
|
2625 (message (concat "Get it from archive.cis.ohio-state.edu "
|
|
|
2626 "or roebling.poly.edu"))))))
|
|
|
2627
|
|
|
2628 ;;; Provide this package as crypt++ as well as crypt.
|
|
|
2629 (provide 'crypt++)
|
|
|
2630 (provide 'crypt)
|
|
|
2631
|
|
|
2632 ;;; crypt++.el ends here.
|
