IDEA - Perl interface to IDEA block cipher
use Crypt::IDEA;
This perl extension is an implementation of the IDEA block cipher algorithm. The module implements the Crypt::BlockCipher interface, which has the following methods
Returns the size (in bytes) of the block cipher.
Returns the size (in bytes) of the key.
my $cipher = new IDEA $key;
This creates a new IDEA BlockCipher object, using $key, where $key is a key of keysize() bytes.
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.
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.
my $key = pack("H32", "0123456789ABCDEF0123456789ABCDEF");
my $cipher = new IDEA $key;
my $ciphertext = $cipher->encrypt("plaintex"); # NB - 8 bytes
print unpack("H16", $ciphertext), "\n";
Bruce Schneier, Applied Cryptography, 1995, Second Edition, published by John Wiley & Sons, Inc.
This implementation is copyright Systemics Ltd ( http://www.systemics.com/ ).
The IDEA algorithm is patented in Europe and the United States by Ascom-Tech AG.
