NAME

Crypt::Cipher::Serpent - Symmetric cipher Serpent, key size: 128/192/256 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('Serpent');
my $ciphertext = $cbc->encrypt("secret data", $key, $iv);
### example 2 (slower)
use Crypt::CBC;
use Crypt::Cipher::Serpent;
my $key = '...'; # length has to be valid key size for this cipher
my $iv = '...';  # 16 bytes
my $cbc = Crypt::CBC->new( -cipher=>'Cipher::Serpent', -key=>$key, -iv=>$iv );
my $ciphertext = $cbc->encrypt("secret data");

DESCRIPTION

This module implements the Serpent 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

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

encrypt

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

decrypt

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

keysize

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

blocksize

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

max_keysize

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

min_keysize

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

default_rounds

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