Rijndael_PP(3) User Contributed Perl Documentation Rijndael_PP(3)NAME
Crypt::Rijndael_PP - Perl implementation of Rijndael
DISCLAIMER
This is a pure perl implementation of the new AES Rijndael. You want
to use "Crypt::Rijndael" where available. This implementation is really
slow, but I am working on it.
SYNOPSIS
# Functional style
use Crypt::Rijndael_PP ':all';
$key = '1234567890ABCDEF' x 4; # 256bit hex number
# keysize = 256bit, blocksize = 128bit
$c_txt = rijndael_encrypt($key, MODE_CBC, $data, 256, 128);
$p_txt = rijndael_decrypt($key, MODE_CBC, $c_txt, 256, 128);
# OO style
# same interface as Crypt::Rijndael
use Crypt::Rijndael_PP;
$cipher = Crypt::Rijndael_PP->new( pack('H*', $key), MODE_CBC );
$c_txt = $cipher->encrypt($data);
$p_txt = $cipher->decrypt($c_txt);
DESCRIPTION
This modules shares the OO style interface with "Crypt::Rijndael" from
Rafael R. Sevilla.
· Supported modes: Electronic CodeBook (MODE_ECB) and Cipher Block
Chaining (MODE_CBC). Please use "Crypt::CBC" for CBC-Mode, as my
CBC is not compatible with neither "Crypt::CBC" nor
"Crypt::Rijndael" and it is subject to change in the near future.
When using "Crypt::CBC" this module is 100% compatible to
"Crypt::Rijndael" and you can decrypt and encrypt your data with
both modules!
· Supported keysizes: 128, 192 and 256 (default)
· Supported blocksizes: 128 (default), 192 and 256
If the size of the key does not match the given keysize then the key is
padded with "0" (hex) or truncated to the right size.
The last data block is padded with "\0" if it does not match a multiple
of the blocksize.
Warnings a raised in both cases.
EXAMPLES
Using "Crypt::CBC"
use Crypt::CBC;
my $key = 'my secret key';
my $input = 'The answer is 42.';
my $cipher = new Crypt::CBC($key,'Rijndael_PP');
my $ciphertext = $cipher->encrypt($input);
my $plaintext = $cipher->decrypt($ciphertext);
# - or -
#!/usr/local/bin/perl -w
#
# Usage: r.pl e "my secret key" < in > out
#
use strict;
use Crypt::CBC;
die "Usage: $0 mode([ed]) key\n" unless @ARGV == 2;
my $cipher = new Crypt::CBC($ARGV[1],'Rijndael_PP');
$cipher->start($ARGV[0]);
my $buffer;
while( read(STDIN, $buffer, 1024) ) {
print $cipher->crypt($buffer);
}
print $cipher->finish;
LIMITATIONS
This implementation is really slow. I'm trying to tweak the performance
in coming releases.
CBC-Mode is not yet compatible to "Crypt::Rijndael". But you are
advised to use "Crypt::CBC" for this mode anyway.
SEE ALSO
Crypt::Rijndael
Crypt::CBC
<http://csrc.nist.gov/encryption/aes/>
COPYRIGHT
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
Copyright 2001 Christian Lackas
Copyright 2000 Vincent Rijmen and Joan Daemen
AUTHORS
The original algorithm was developed by Vincent Rijmen and Joan Daemen.
This release was made by Christian Lackas <delta@lackas.net>.
http://www.lackas.net/. It is based on the reference implementation for
the AES contest. At present I am working on a faster version.
perl v5.14.2 2010-09-22 Rijndael_PP(3)
