Blowfish_PP(3) User Contributed Perl Documentation Blowfish_PP(3)NAMECrypt::Blowfish_PP - Blowfish encryption algorithm implemented purely
in Perl
SYNOPSIS
"use Crypt::Blowfish_PP";
$blowfish=new Crypt::Blowfish_PP($key);
$ciphertextBlock=$blowfish->encrypt($plaintextBlock);
$plaintextBlock=$blowfish->decrypt($ciphertextBlock);
DESCRIPTION
The Crypt::Blowfish_PP module provides for users to use the Blowfish
encryption algorithm in perl. The implementation is entirely Object
Oriented, as there is quite a lot of context inherent in making blow-
fish as fast as it is. The key is anywhere between 64 and 448 bits (8
and 56 bytes), and should be passed as a packed string. The transforma-
tion itself is a 16-round Feistel Network, and operates on a 64 bit
block.
Object methods for the Crypt::Blowfish_PP module:
new(key)
The new() method initialises a blowfish object with the key that is
passed. This is the slow part of doing a blowfish encryption or
decryption, as it initialises the 18 p-boxes and the 1024 s-boxes that
are used for the algorithm. It will return undef if the key is not of
a valid length.
encrypt(block)
The encrypt() method uses the initialised blowfish object to encrypt 8
bytes of data of the string passed to it. It returns the encrypted
block.
decrypt(block)
The decrypt() method uses the initialised blowfish object to decrypt 8
bytes of data of the string passed to it. It returns the decrypted
block.
COMMENTS
This is probably crap software, but hey, its for general use. I'm happy
to patch it with other people's code... :)
If you want speed, then see the Crypt::Blowfish module.
AUTHOR
Matthew Byng-Maddick <"mbm@colondot.net">
SEE ALSO
http://www.counterpane.com/,Crypt::CBC
perl v5.8.8 2001-01-02 Blowfish_PP(3)
