perl-Crypt-Rijndael

This module implements the Rijndael cipher, which has just been selected as
the Advanced Encryption Standard.

keysize
Returns the keysize, which is 32 (bytes). The Rijndael cipher actually
supports keylengths of 16, 24 or 32 bytes, but there is no way to
communicate this to 'Crypt::CBC'.

blocksize
The blocksize for Rijndael is 16 bytes (128 bits), although the algorithm
actually supports any blocksize that is any multiple of our bytes. 128
bits, is however, the AES-specified block size, so this is all we
support.

$cipher = Crypt::Rijndael->new( $key [, $mode] )
Create a new 'Crypt::Rijndael' cipher object with the given key (which
must be 128, 192 or 256 bits long). The additional '$mode' argument is
the encryption mode, either 'MODE_ECB' (electronic codebook mode, the
default), 'MODE_CBC' (cipher block chaining, the same that 'Crypt::CBC'
does), 'MODE_CFB' (128-bit cipher feedback), 'MODE_OFB' (128-bit output
feedback), or 'MODE_CTR' (counter mode).
ECB mode is very insecure (read a book on cryptography if you don't know
why!), so you should probably use CBC mode.

$cipher->set_iv($iv)
This allows you to change the initial value vector used by the chaining
modes. It is not relevant for ECB mode.

$cipher->encrypt($data)
Encrypt data. The size of '$data' must be a multiple of 'blocksize' (16
bytes), otherwise this function will croak. Apart from that, it can be of
(almost) any length.

$cipher->decrypt($data)
Decrypts '$data'.



          

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License: LGPL-3.0
URL: http://search.cpan.org/dist/Crypt-Rijndael/