NAME
DES - Perl interface to DES block cipher
SYNOPSIS
use Crypt::DES;DESCRIPTION
This perl extension is an implementation of the DES block cipher algorithm. The module implements the Crypt::BlockCipher interface, which has the following methods
FUNCTIONS
- blocksize
-
Returns the size (in bytes) of the block cipher.
- keysize
-
Returns the size (in bytes) of the key.
- new
-
my $cipher = new DES $key;This creates a new DES BlockCipher object, using $key, where $key is a key of
keysize()bytes. - encrypt
-
my $cipher = new DES $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 DES $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("H16", "0123456789ABCDEF");
my $cipher = new DES $key;
my $ciphertext = $cipher->encrypt("plaintex"); # NB - 8 bytes
print unpack("H16", $ciphertext), "\n";SEE ALSO
Crypt::IDEA
Bruce Schneier, Applied Cryptography, 1995, Second Edition, published by John Wiley & Sons, Inc.
COPYRIGHT
The implementation of the DES algorithm was developed by, and is copyright of, Eric Young (eay@mincom.oz.au). Other parts of this perl extension are copyright of Systemics Ltd ( http://www.systemics.com/ ).