#NAME

Crypt::Cipher::DES - Symmetric cipher DES, key size: 64[56] bits

#SYNOPSIS

### example 1
use Crypt::Mode::CBC;

my $key = '...'; # length has to be valid key size for this cipher
my $iv = '...';  # 16 bytes
my $cbc = Crypt::Mode::CBC->new('DES');
my $ciphertext = $cbc->encrypt("secret data", $key, $iv);

### example 2 (slower)
use Crypt::CBC;
use Crypt::Cipher::DES;

my $key = '...'; # length has to be valid key size for this cipher
my $iv = '...';  # 16 bytes
my $cbc = Crypt::CBC->new( -cipher=>'Cipher::DES', -key=>$key, -iv=>$iv );
my $ciphertext = $cbc->encrypt("secret data");

#DESCRIPTION

This module implements the DES cipher. Provided interface is compliant with Crypt::CBC module.

BEWARE: This module implements just elementary "one-block-(en|de)cryption" operation - if you want to encrypt/decrypt generic data you have to use some of the cipher block modes - check for example Crypt::Mode::CBC, Crypt::Mode::CTR or Crypt::CBC (which will be slower).

#METHODS

#new

$c = Crypt::Cipher::DES->new($key);
#or
$c = Crypt::Cipher::DES->new($key, $rounds);

#encrypt

$ciphertext = $c->encrypt($plaintext);

#decrypt

$plaintext = $c->decrypt($ciphertext);

#keysize

$c->keysize;
#or
Crypt::Cipher::DES->keysize;
#or
Crypt::Cipher::DES::keysize;

#blocksize

$c->blocksize;
#or
Crypt::Cipher::DES->blocksize;
#or
Crypt::Cipher::DES::blocksize;

#max_keysize

$c->max_keysize;
#or
Crypt::Cipher::DES->max_keysize;
#or
Crypt::Cipher::DES::max_keysize;

#min_keysize

$c->min_keysize;
#or
Crypt::Cipher::DES->min_keysize;
#or
Crypt::Cipher::DES::min_keysize;

#default_rounds

$c->default_rounds;
#or
Crypt::Cipher::DES->default_rounds;
#or
Crypt::Cipher::DES::default_rounds;

CONTENTS