perldoc > Crypt::Cipher::DES(3pm)

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📛 NAME

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

🚀 Quick Reference

📌 Use Case	🔧 Command	📝 Description
Create cipher instance	$c = Crypt::Cipher::DES->new($key)	Initialize DES with an 8‑byte key
Encrypt one block	$ciphertext = $c->encrypt($plaintext)	Encrypt a single block of plaintext
Decrypt one block	$plaintext = $c->decrypt($ciphertext)	Decrypt a single block of ciphertext
Get key size	$c->keysize	Returns 8 (bytes)
Get block size	$c->blocksize	Returns 8 (bytes)
Full encryption with CBC	$cbc = Crypt::Mode::CBC->new('DES'); $ct = $cbc->encrypt($data, $key, $iv)	Recommended mode for arbitrary data

📝 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;

👀 SEE ALSO

• 📦 CryptX, Crypt::Cipher
• 🌐 <https://en.wikipedia.org/wiki/Data_Encryption_Standard>

📛 NAME 🚀 Quick Reference 📝 SYNOPSIS 📖 DESCRIPTION 📋 METHODS 👀 SEE ALSO