Crypt::ARIA - Perl extension for ARIA encryption/decryption algorithm.
version 0.005
use Crypt::ARIA;
# create an object
my $aria = Crypt::ARIA->new();
# or,
my $key = pack 'H*', '00112233445566778899aabbccddeeff';
my $aria = Crypt::ARIA->new( $key );
# set master key
$aria->set_key( pack 'H*', '00112233445566778899aabbccddeeff' );
# or
# (whitespace allowed)
$aria->set_key_hexstring( '00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff' );
# one block encryption/decryption
# $plaintext and $ciphertext should be of "blocksize()" bytes.
my $cipher = $aria->encrypt( $plain );
my $plain = $aria->decrypt( $cipher );
# multi block encryption/decryption
# simple ECB mode
my $cipher = $aria->encrypt_ecb( $plain );
my $decrypted = $aria->decrypt_ecb( $cipher );
# note that $decrypt may not be same as $plain, because it is appended
# null bytes to.
# CBC mode
use Crypt::CBC;
my $cbc = Crypt::CBC->new(
-cipher => Crypt::ARIA->new()->set_key( $key ),
-iv => $initial_vector,
-header => 'none';
-padding => 'none';
);
my $cipher = $cbc->encrypt( $plain );
my $plain = $cbc->decrypt( $cipher );
Crypt::ARIA provides an interface between Perl and ARIA implementation in C.
ARIA is a block cipher algorithm designed in South Korea. For more information about ARIA, visit links in "SEE ALSO" section.
The C portion of this module is made by researchers of ARIA and is available from the ARIA website. I had asked them and they've made sure that the code is free to use.
-
new
new()
method creates an object.my $aria = Crypt::ARIA->new();
You can give a master key as argument. The master key in ARIA should be of 16, 24, or 32 bytes.
my $key = pack 'H*', '00112233445566778899aabbccddeeff'; my $aria = Crypt::ARIA->new( $key );
-
set_key
set_key()
sets a master key. This method returns the object itself.$aria->set_key( pack 'H*', '00112233445566778899aabbccddeeff' );
-
set_key_hexstring
set_key_hexstring()
sets a master key. You can give a hexstring as argument. The hexstring can include whitespaces. This method returns the object itself.$aria->set_key_hexstring( '00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff' );
-
unset_key
This method removes the master key from object and return the object itsetf.
$aria->unset_key();
-
has_key
This method returns true if a master key is set, false otherwise.
-
encrypt
encrypt()
encrypts a block of plaintext.my $cipher = $aria->encrypt( $plain );
$plain should be of exactly 16 bytes. It returns a ciphertext of 16 bytes. If you want to encrypt a text of different length, you have to choose the operation mode and the padding method. You may implement them by yourself or use another module for them.
Crypt::ARIA
is designed to be compatible with Crypt::CBC. Therefore, you can useCrypt::CBC
to use CBC mode with several padding methods.use Crypt::CBC; my $cbc = Crypt::CBC->new( -cipher => Crypt::ARIA->new()->set_key( $key ), -iv => $initial_vector, -header => 'none'; -padding => 'none'; ); my $cipher = $cbc->encrypt( $plain ); my $plain = $cbc->decrypt( $cipher );
-
decrypt
decrypt()
decrypts a block of ciphertext.my $plain = $aria->decrypt( $cipher );
$cipher should be of exactly 16 bytes. Again, you have to use another module to decrypt multi-block message.
-
encrypt_ecb
This method encrypts a plaintext of arbitrary length.
my $cipher = $aria->encrypt_ecb( $plain );
It returns the ciphertext whose length is multiple of 16 bytes.
NOTE: If the length of $plain is not n-times of 16 exactly,
encrypt_ecb()
appends null bytes to fill it. If the length is n-times of 16 exactly, $plain would be untouched. This means you should have to deliver the original length of $plain to the receiver. You had better use other module like Crypt::CBC that provides advanced operation mode and padding method. This method is just for test purpose. -
decrypt_ecb
This method decrypts a multi-block ciphertext.
my $decrypted = $aria->decrypt_ecb( $cipher );
As described in "encrypt_ecb", $decrypted may contain a sequence of null bytes in its end. You should remove them yourself.
http://en.wikipedia.org/wiki/ARIA_%28cipher%29
http://210.104.33.10/ARIA/index-e.html
IETF RFC 5794 : A Description of the ARIA Encryption Algorithm http://tools.ietf.org/html/rfc5794
Geunyoung Park [email protected]
This software is copyright (c) 2013 by Geunyoung Park.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.