Crypt::DES_EDE3 - Triple-DES EDE encryption/decryption
use Crypt::DES_EDE3;
my $ede3 = Crypt::DES_EDE3->new($key);
$ede3->encrypt($block);
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.
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.
Encrypts an 8-byte block of data
$block using the three DES
ciphers in an encrypt-decrypt-encrypt operation.
Returns the encrypted block.
Decrypts an 8-byte block of data
$block using the three DES
ciphers in a decrypt-encrypt-decrypt operation.
Returns the decrypted block.
Returns the block size (8).
Returns the key size (24).
Crypt::DES_EDE3 is free software; you may redistribute it and/or modify it under
the same terms as Perl itself.
Crypt::DES_EDE3 is Copyright 2001 Benjamin Trott,
[email protected]. All
rights reserved.