NAME

       Crypt::DES - Perl DES encryption module

SYNOPSIS

           use Crypt::DES;

DESCRIPTION

       The module implements the Crypt::CBC interface, which has the following methods

       blocksize =item keysize =item encrypt =item decrypt

FUNCTIONS

       blocksize
           Returns the size (in bytes) of the block cipher.

       keysize
           Returns the size (in bytes) of the key. Optimal size is 8 bytes.

       new
                   my $cipher = new Crypt::DES $key;

           This creates a new Crypt::DES BlockCipher object, using $key, where $key is a key of keysize() bytes.

       encrypt
                   my $cipher = new Crypt::DES $key;
                   my $ciphertext = $cipher->encrypt($plaintext);

           This function encrypts $plaintext and returns the $ciphertext where $plaintext and $ciphertext should
           be of blocksize() bytes.

       decrypt
                   my $cipher = new Crypt::DES $key;
                   my $plaintext = $cipher->decrypt($ciphertext);

           This function decrypts $ciphertext and returns the $plaintext where $plaintext and $ciphertext should
           be of blocksize() bytes.

EXAMPLE

               my $key = pack("H16", "0123456789ABCDEF");
               my $cipher = new Crypt::DES $key;
               my $ciphertext = $cipher->encrypt("plaintex");  # NB - 8 bytes
               print unpack("H16", $ciphertext), "\n";

NOTES

       Do  note  that  DES  only  uses 8 byte keys and only works on 8 byte data blocks.  If you're intending to
       encrypt larger blocks or entire files, please use Crypt::CBC in conjunction with this  module.   See  the
       Crypt::CBC documentation for proper syntax and use.

       Also  note  that  the  DES algorithm is, by today's standard, weak encryption.  Crypt::Blowfish is highly
       recommended if you're interested in using strong encryption and a faster algorithm.

SEE ALSO

       Crypt::Blowfish Crypt::IDEA

       Bruce Schneier, Applied Cryptography, 1995, Second Edition, published by John Wiley & Sons, Inc.

COPYRIGHT

       The  implementation  of  the  DES  algorithm  was  developed  by,  and  is  copyright  of,   Eric   Young
       (eay@mincom.oz.au).   Other  parts  of  the  perl  extension  and module are copyright of Systemics Ltd (
       http://www.systemics.com/ ).  Cross-platform work and packaging  for  single  algorithm  distribution  is
       copyright of W3Works, LLC.

MAINTAINER

       This single-algorithm package and cross-platform code is maintained by Dave Paris <amused@pobox.com>.

perl v5.38.2                                       2024-04-01                                           DES(3pm)