Crypt::...Noekeon(3)

💅 NAME 💅

Bestie, welcome to the Crypt::...Noekeon(3) manual page from the User Contributed Perl Documentation crew. This one is all about Crypt::Cipher::Noekeon — Symmetric cipher Noekeon, key size: 128 bits. Periodt. 💖

✨ SYNOPSIS ✨

Two whole examples, bestie — example 2 is literally marked (slower). Keep the code exactly as it is, especially the comments, because they are doing important work.

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

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

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

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

🦋 DESCRIPTION 🦋

This module implements the Noekeon cipher, and its interface is compatible with Crypt::CBC. Iconic. ✨

Note, bestie: this module only implements single-block encryption and decryption. For general data, use a block mode such as Crypt::Mode::CBC, Crypt::Mode::CTR, or Crypt::CBC (which is slower). No cap.

💅 METHODS 💅

Unless noted otherwise, assume $c is an existing cipher object created via new, like this:

my $c = Crypt::Cipher::Noekeon->new($key);

🌸 new

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

# $key .... [binary string] key of an accepted length (see keysize, min_keysize, max_keysize)
# $rounds . [integer] optional, number of rounds (if supported by the cipher; croaks on invalid value)

$key is a binary string with an accepted length — check keysize, min_keysize, and max_keysize for the receipts. $rounds is optional, an integer, the number of rounds (if supported by the cipher; croaks on invalid value). 🫶

🌟 encrypt

Encrypts exactly one block of plaintext. The length of $plaintext must equal blocksize; croaks otherwise. An empty string is accepted and returned unchanged. Literally one block, bestie.

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

Returns the encrypted block as a binary string (raw bytes). 🔥

🧚 decrypt

Decrypts exactly one block of ciphertext. The length of $ciphertext must equal blocksize; croaks otherwise. An empty string is accepted and returned unchanged. Same block-sized energy.

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

Returns the decrypted block as a binary string (raw bytes). 💜

🌈 keysize

Just an alias for max_keysize.

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

🎀 blocksize

Returns the cipher block size (in bytes).

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

🦋 max_keysize

Returns the maximum key size (in bytes).

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

🌸 min_keysize

Returns the minimum key size (in bytes).

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

⭐ default_rounds

Returns the cipher's default round count.

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

🌈 SEE ALSO 🌈

• CryptX, Crypt::Cipher
• <https://en.wikipedia.org/wiki/NOEKEON>

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That’s the whole page, bestie. Source/version: perl v5.42.0; date: 2026-05-11. Now go be the main character of your block mode 💖👑