NAME
Crypt::RS14_PP - A pure Perl implementation of RS14, aka "Spritz", encryption algorithm.
Version
0.03
SYNOPSIS
use Crypt::RS14_PP;
my $key = '16 to 64 bytes of key';
my $rs14 = Crypt::RS14_PP->new($key);
my $ctext = $rs14->encrypt('This is my plain text.');
$rs14->set_key($key);
my $ptext = $rs14->encrypt($ctext); # or decrypt as both do the same
print "$ptext\n"; # prints 'This is my plain text.'DESCRIPTION
RS14, aka "Spritz", is an encryption algorithm, proposed by Ron Rivist and Jacob Schuldt, as a replacement for RC4, created by Ron Rivist. RS14, like RC4, is a stream algorithm. It takes the basic concepts behind RC4, enhancing and updating them for greater security.
Being pure Perl, this module is really just a testing tool. An XS or Inline::C implementation will provide far better performance.
Note: While this module's API is a superset of the Crypt:: API, the RS14 algorithm is not intended for use with Crypt::CBC or similar. By its nature, it already operates in OFB (Output Feedback) mode.
Note: Only the encrypt/decrypt capabilities of RS14 are implmented.
Note: In this module, encrypt/decrypt use bitwise exclusive-or (^) to encipher/decipher the input, as this is commonly used in stream ciphers. As a consequence, encrypt and decrypt are the same. Other operations are possible. This not specified in the algorithm specification.
Note: To encrypt "wide characters", such as Unicode, the character stream must be encoded into a byte stream before encrypting. (For Unicode, use UTF-8 encoding.) Whatever encoding is used, security is enhanced by excluding any byte order marks.
Class Methods
Function new
Creates a RS14 object and optionally sets the cryptographic key.
Parameter scalar $key
Key (optional - used for compatability with other Crypt:: modules)
Instance Methods
Function set_key
Sets the cryptographic key.
Parameter scalar $key
Key - 16 to N/4 bytes of key
Function encrypt
Encrypt (or decrypt) the given data bytes. (This function is identical to decrypt.)
Note: Because this is a stream cipher, encrypt("ab") eq encrypt("a") . encrypt("b"). To encrypt (or decrypt) 2 messages with same key, you must set_key($key) before each message. Also, to encrypt and decrypt with same key, you must set_key($key) between encrypting and decrypting (or use 2 objects).
Parameter scalar $string
Byte string to encrypt or decrypt
Function decrypt
Decrypt (or encrypt) the given data bytes. (This function is identical to encrypt.)
See "encrypt".
REFERENCES
Spritz - a spongy RC4-like stream cipher and hash function, 2014, Ronald L. Rivest, MIT and Jacob C. N. Schuldt, AIST (Japan) http://people.csail.mit.edu/rivest/pubs/RS14.pdf
AUTHOR
RonW, <ronw at cpan.org>
BUGS
Please report any bugs or feature requests to bug-crypt-rs14_pp at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Crypt-RS14_PP. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
SUPPORT
You can find documentation for this module with the perldoc command.
perldoc Crypt::RS14_PPLICENSE AND COPYRIGHT
Copyright 2015 RonW, ronw at cpan.org
This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:
http://www.perlfoundation.org/artistic_license_2_0
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