IDEA(3) User Contributed Perl Documentation IDEA(3)NAME
IDEA - Perl interface to IDEA block cipher
SYNOPSIS
use Crypt::IDEA;
DESCRIPTION
This perl extension is an implementation of the IDEA block cipher algo-
rithm. The module implements the Crypt::BlockCipher interface, which
has the following methods
blocksize =item keysize =item encrypt =item decrypt
FUNCTIONS
blocksize
Returns the size (in bytes) of the block cipher.
keysize
Returns the size (in bytes) of the key.
new
my $cipher = new IDEA $key;
This creates a new IDEA BlockCipher object, using $key, where $key
is a key of "keysize()" bytes.
encrypt
my $cipher = new IDEA $key;
my $ciphertext = $cipher->encrypt($plaintext);
This function encrypts $plaintext and returns the $ciphertext where
$plaintext and $ciphertext should be of "blocksize()" bytes.
decrypt
my $cipher = new IDEA $key;
my $plaintext = $cipher->decrypt($ciphertext);
This function decrypts $ciphertext and returns the $plaintext where
$plaintext and $ciphertext should be of "blocksize()" bytes.
EXAMPLE
my $key = pack("H32", "0123456789ABCDEF0123456789ABCDEF");
my $cipher = new IDEA $key;
my $ciphertext = $cipher->encrypt("plaintex"); # NB - 8 bytes
print unpack("H16", $ciphertext), "\n";
SEE ALSO
Crypt::CBD, Crypt::DES, Crypt::Blowfish
Bruce Schneier, Applied Cryptography, 1995, Second Edition, published
by John Wiley & Sons, Inc.
COPYRIGHT
This implementation is copyright Systemics Ltd ( http://www.sys-
temics.com/ ).
The IDEA algorithm is patented in Europe and the United States by
Ascom-Tech AG.
Module altered between 1999 and 2005 to allow added functionality with
perl -MCPAN, Changes by Dave Paris (edited lib paths, endian issues,
new tests).
Thank you to contributors for endian patches and new test suite!
perl v5.8.8 2005-12-08 IDEA(3)
