1NAME 2 Crypt::DES_PP - Perl extension for DES encryption 3 4SYNOPSIS 5 use Crypt::DES_PP; 6 7 $des = Crypt::DES_PP->new ($key); 8 $cipher = $des->encrypt ($plain); 9 $plain = $des->decrypt ($cipher); 10 $blocksize = $des->blocksize; 11 $keysize = $des->keysize; 12 13DESCRIPTION 14 The Data Encryption Standard (DES), also known as Data 15 Encryption Algorithm (DEA) is a semi-strong encryption and 16 decryption algorithm. 17 18 The module is 100 % compatible to Crypt::DES but is implemented 19 entirely in Perl. That means that you do not need a C compiler 20 to build and install this extension. 21 22 The module implements the Crypt::CBC interface. You are 23 encouraged to read the documentation for Crypt::CBC if you 24 intend to use this module for Cipher Block Chaining. 25 26 The minimum (and maximum) key size is 8 bytes. Shorter keys will 27 cause an exception, longer keys will get silently truncated. 28 Data is encrypted and decrypted in blocks of 8 bytes. 29 30 The module implements the Ultra-Fast-Crypt (UFC) algorithm as 31 found for example in the GNU libc. On the Perl side a lot has 32 been done in order to make the module as fast as possible 33 (function inlining, use integer, ...). 34 35 Note: For performance issues the source code for the module is 36 first preprocessed by m4. That means that you need an m4 macro 37 processor in order to hack on the sources. This is of no concern 38 for you if you only want to use the module, the preprocessed 39 output is always included in the distribution. 40 41BUGS 42 Nothing known. The module has not been tested on 64 bit 43 architectures. 44 45AUTHOR 46 This implementation was written by Guido Flohr 47 (guido@imperia.net). It is available under the terms of the 48 Lesser GNU General Public License (LGPL) version 2 or - at your 49 choice - any later version, see the file ``COPYING.LIB''. 50 51 The original C implementation of the Ultra-Fast-Crypt algorithm 52 was written by Michael Glad (glad@daimi.aau.dk) and has been 53 donated to the Free Software Foundation, Inc. It is covered by 54 the GNU library license version 2, see the file ``COPYING.LIB''. 55 56SEE ALSO 57 Crypt::CBC(3), Crypt::DES(3), perl(1), m4(1). 58 59