文件列表:

ccrypt-1.9\ccrypt-1.9\ABOUT-NLS (67388, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\aclocal.m4 (254034, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\AUTHORS (362, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\ChangeLog (24812, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\check\boxes-ref.dat (5612, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\ccrypt-check.sh (4620, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\common.sh (1737, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\crypt3-check.c (2224, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\largefile-check.sh (1155, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\length-check.sh (2490, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\Makefile.am (1068, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\Makefile.in (19277, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\check\nulldata (0, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\rijndael-alg-ref.c (10061, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\rijndael-alg-ref.h (2534, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\rijndael-check.c (3033, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata (782, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata.cpt (814, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata.m (782, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata.ucpt (782, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata31 (31, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\check\testdata31.cpt (0, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\config.guess (43332, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\config.h.in (9327, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\config.rpath (14869, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\config.sub (31307, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\configure (930294, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\configure.ac (4618, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\COPYING (18009, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\depcomp (15936, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\doc\ccrypt.1.in (24784, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\doc\cypfaq01.txt (120489, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\doc\Makefile.am (1076, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\doc\Makefile.in (14325, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\doc\man2html.sed (814, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\elisp-comp (2712, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\emacs\elisp-comp (1698, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\emacs\Makefile.am (297, 2009-08-27)
ccrypt-1.9\ccrypt-1.9\emacs\Makefile.in (13923, 2009-08-29)
ccrypt-1.9\ccrypt-1.9\emacs\ps-ccrypt.el (34012, 2009-08-27)
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ccrypt Secure encryption and decryption of files and streams _________________________________________________________________ Updated August 26, 2009 Description ccrypt is a utility for encrypting and decrypting files and streams. It was designed as a replacement for the standard unix crypt utility, which is notorious for using a very weak encryption algorithm. ccrypt is based on the Rijndael cipher, which is the U.S. government's chosen candidate for the Advanced Encryption Standard (AES, see http://www.nist.gov/aes). This cipher is believed to provide very strong security. Unlike unix crypt, the algorithm provided by ccrypt is not symmetric, i.e., one must specify whether to encrypt or decrypt. The most common way to invoke ccrypt is via the commands ccencrypt and ccdecrypt. There is also a ccat command for decrypting a file directly to the terminal, thus reducing the likelihood of leaving temporary plaintext files around. In addition, there is a compatibility mode for decrypting legacy unix crypt files. An emacs mode is also supplied for editing encrypted text files. Encryption and decryption depends on a keyword (or key phrase) supplied by the user. By default, the user is prompted to enter a keyword from the terminal. Keywords can consist of any number of characters, and all characters are significant (although ccrypt internally hashes the key to 256 bits). Longer keywords provide better security than short ones, since they are less likely to be discovered by exhaustive search. For a detailed description of the encryption algorithm used by ccrypt, see the man page. Downloading and Installing from Source The current version of ccrypt can be downloaded as a gzipped tar archive from http://ccrypt.sourceforge.net/. You can unpack the archive with a command such as tar -zxf ccrypt-XXX.tar.gz For compiling and installation, please follow the instructions in the file INSTALL. The basic installation sequence is: ./configure make make check The only non-standard configuration option is --disable-libcrypt. Normally, ccrypt will be linked against the libcrypt library, if available. If this library is not available, or if the --disable-libcrypt option is given to ./configure, then we will use our own replacement for this library. This is useful for creating binary distributions when we don't want to distribute libcrypt.so. Downloading and Installing Precompiled Distributions ccrypt is also available in precompiled formats for a number of popular platforms, including Linux, MacOS X, FreeBSD, Sun Solaris, AIX, and Windows under CygWin. In each case, just install the binaries in one of the places where the operating system usually looks for them, such as /usr/local/bin. You should also create symbolic links to the ccrypt binary named ccencrypt, ccdecrypt, and ccat; when ccrypt is invoked by one of these names, its default behavior changes. To create the appropriate links, change to the directory where you have installed ccrypt, and run the commands ln -s ccrypt ccencrypt ln -s ccrypt ccdecrypt ln -s ccrypt ccat You may also want to install the man page by copying ccrypt.1 to an appropriate directory, such as /usr/local/man/man1. The precompiled distributions are usually prepared without internationalization support. Windows users see the file README-WIN. For users of the Redhat Package Manager, ccrypt is also available as a source RPM or binary RPM. Usage Usage: ccrypt [mode] [options] [file...] ccencrypt [options] [file...] ccdecrypt [options] [file...] ccat [options] file... Modes: -e, --encrypt encrypt -d, --decrypt decrypt -c, --cat cat; decrypt files to stdout -x, --keychange change key -u, --unixcrypt decrypt old unix crypt files Options: -h, --help print this help message and exit -V, --version print version info and exit -L, --license print license info and exit -v, --verbose print progress information to stderr -q, --quiet run quietly; suppress warnings -f, --force overwrite existing files without asking -m, --mismatch allow decryption with non-matching key -E, --envvar var read keyword from environment variable (unsafe) -K, --key key give keyword on command line (unsafe) -k, --keyfile file read keyword(s) as first line(s) from file -P, --prompt prompt use this prompt instead of default -S, --suffix .suf use suffix .suf instead of default .cpt -s, --strictsuffix refuse to encrypt files which already have suffix -F, --envvar2 var as -E for second keyword (for keychange mode) -H, --key2 key as -K for second keyword (for keychange mode) -Q, --prompt2 prompt as -P for second keyword (for keychange mode) -t, --timid prompt twice for encryption keys (default) -b, --brave prompt only once for encryption keys -y, --keyref file encryption key must match this encrypted file -r, --recursive recurse through directories -R, --rec-symlinks follow symbolic links as subdirectories -l, --symlinks dereference symbolic links -T, --tmpfiles use temporary files instead of overwriting (unsafe) -- end of options, filenames follow For detailed usage information, see the man page. Emacs support ccrypt comes with an emacs package for reading and writing encrypted files. The package is called ps-ccrypt, and it is based on the jka-compr package which is part of GNU Emacs. Unlike previous versions of this package, it can be used in addition to, and not instead of, jka-compr, to handle both encrypted and compressed files. (However, files that are both encrypted and compressed are not currently handled correctly). To use the package, simply load ps-ccrypt and edit as usual. When you open a file with the ".cpt" extension, emacs will prompt you for a password for the file. It will remember the password for the buffer, and when you save the file later, it will be automatically encrypted again (provided you save it with a ".cpt" extension). Except for the password prompt, the operation of the package should be transparent to the user. The command M-x ccrypt-set-buffer-password can be used to change the current password of a buffer. The simplest way to use this package is to include the lines (setq load-path (cons "path" load-path)) (require 'ps-ccrypt "ps-ccrypt.el") in your .emacs file, where path is the directory which holds the file ps-ccrypt.el. Support and Reporting Bugs Ccrypt has a project page on SourceForge at http://sourceforge.net/projects/ccrypt/. There you will find facilities for reporting bugs, submitting patches, asking for support, asking for features, or discussing ccrypt in general. You are encouraged to use these facilities. You can also send email to the author. Author Copyright (C) 2000-2009 Peter Selinger License This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. GPG Key Peter Selinger's GPG key fingerprint is: 12A2 4B3C 3790 B688 E484 7A*** A68B CC37 CA31 696A

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