Twofish(3) User Contributed Perl Documentation Twofish(3)NAMECrypt::Twofish - The Twofish Encryption Algorithm
SYNOPSIS
use Crypt::Twofish;
$cipher = Crypt::Twofish->new($key);
$ciphertext = $cipher->encrypt($plaintext);
$plaintext = $cipher->decrypt($ciphertext);
DESCRIPTION
Twofish is a 128-bit symmetric block cipher with a variable length
(128, 192, or 256-bit) key, developed by Counterpane Labs. It is
unpatented and free for all uses, as described at
<URL:http://www.counterpane.com/twofish.html>.
This module implements Twofish encryption. It supports the Crypt::CBC
interface, with the functions described below. It also provides an
interface that is call-compatible with Crypt::Twofish 1.0, but its use
in new code is strongly discouraged.
Functions
blocksize
Returns the size (in bytes) of the block (16, in this case).
keysize
Returns the size (in bytes) of the key. Although the module
understands 128, 192, and 256-bit keys, it returns 16 for
compatibility with Crypt::CBC.
new($key)
This creates a new Crypt::Twofish object with the specified key
(which should be 16, 24, or 32 bytes long).
encrypt($data)
Encrypts blocksize() bytes of $data and returns the corresponding
ciphertext.
decrypt($data)
Decrypts blocksize() bytes of $data and returns the corresponding
plaintext.
SEE ALSO
Crypt::CBC, Crypt::Blowfish, Crypt::TEA
ACKNOWLEDGEMENTS
Nishant Kakani
For writing Crypt::Twofish 1.0 (this version is a complete
rewrite).
Tony Cook
For making the module work under Activeperl, testing on several
platforms, and suggesting that I probe for features via %Config.
AUTHOR
Abhijit Menon-Sen <ams@toroid.org>
Copyright 2001 Abhijit Menon-Sen.
This module is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.14.1 2010-05-08 Twofish(3)
