bionic (3) Crypt::DES_EDE3.3pm.gz

Provided by: libcrypt-des-ede3-perl_0.01-1.1_all bug

NAME
       Crypt::DES_EDE3 - Triple-DES EDE encryption/decryption


SYNOPSIS
           use Crypt::DES_EDE3;
           my $ede3 = Crypt::DES_EDE3->new($key);
           $ede3->encrypt($block);


DESCRIPTION
       Crypt::DES_EDE3 implements DES-EDE3 encryption. This is triple-DES encryption where an encrypt operation
       is encrypt-decrypt-encrypt, and decrypt is decrypt-encrypt-decrypt. This implementation uses Crypt::DES
       to do its dirty DES work, and simply provides a wrapper around that module: setting up the individual DES
       ciphers, initializing the keys, and performing the encryption/decryption steps.

       DES-EDE3 encryption requires a key size of 24 bytes.

       You're probably best off not using this module directly, as the encrypt and decrypt methods expect
       8-octet blocks. You might want to use the module in conjunction with Crypt::CBC, for example. This would
       be DES-EDE3-CBC, or triple-DES in outer CBC mode.


USAGE
       $ede3 = Crypt::DES_EDE3->new($key)

       Creates a new Crypt::DES_EDE3 object (really, a collection of three DES ciphers), and initializes each
       cipher with part of $key, which should be at least 24 bytes. If it's longer than 24 bytes, the extra
       bytes will be ignored.

       Returns the new object.

       $ede3->encrypt($block)

       Encrypts an 8-byte block of data $block using the three DES ciphers in an encrypt-decrypt-encrypt
       operation.

       Returns the encrypted block.

       $ede3->decrypt($block)

       Decrypts an 8-byte block of data $block using the three DES ciphers in a decrypt-encrypt-decrypt
       operation.

       Returns the decrypted block.

       $ede3->blocksize

       Returns the block size (8).

       $ede3->keysize

       Returns the key size (24).


LICENSE
       Crypt::DES_EDE3 is free software; you may redistribute it and/or modify it under the same terms as Perl
       itself.


AUTHOR & COPYRIGHTS
       Crypt::DES_EDE3 is Copyright 2001 Benjamin Trott, ben@rhumba.pair.com. All rights reserved.