Crypt::DES_PP(3) User Contributed Perl Documentation Crypt::DES_PP(3)NAMECrypt::DES_PP - Perl extension for DES encryption
SYNOPSIS
use Crypt::DES_PP;
$des = Crypt::DES_PP->new ($key);
$cipher = $des->encrypt ($plain);
$plain = $des->decrypt ($cipher);
$blocksize = $des->blocksize;
$keysize = $des->keysize;
DESCRIPTION
The Data Encryption Standard (DES), also known as Data Encryption Algo-
rithm (DEA) is a semi-strong encryption and decryption algorithm.
The module is 100 % compatible to Crypt::DES but is implemented
entirely in Perl. That means that you do not need a C compiler to
build and install this extension.
The module implements the Crypt::CBC interface. You are encouraged to
read the documentation for Crypt::CBC if you intend to use this module
for Cipher Block Chaining.
The minimum (and maximum) key size is 8 bytes. Shorter keys will cause
an exception, longer keys will get silently truncated. Data is
encrypted and decrypted in blocks of 8 bytes.
The module implements the Ultra-Fast-Crypt (UFC) algorithm as found for
example in the GNU libc. On the Perl side a lot has been done in order
to make the module as fast as possible (function inlining, use integer,
...).
Note: For performance issues the source code for the module is first
preprocessed by m4. That means that you need an m4 macro processor in
order to hack on the sources. This is of no concern for you if you
only want to use the module, the preprocessed output is always included
in the distribution.
BUGS
Nothing known. The module has not been tested on 64 bit architectures.
AUTHOR
This implementation was written by Guido Flohr (guido@imperia.net). It
is available under the terms of the Lesser GNU General Public License
(LGPL) version 2 or - at your choice - any later version, see the file
``COPYING.LIB''.
The original C implementation of the Ultra-Fast-Crypt algorithm was
written by Michael Glad (glad@daimi.aau.dk) and has been donated to the
Free Software Foundation, Inc. It is covered by the GNU library
license version 2, see the file ``COPYING.LIB''.
SEE ALSOCrypt::CBC(3), Crypt::DES(3), perl(1), m4(1).
perl v5.8.8 2000-10-27 Crypt::DES_PP(3)
