Kravatte PHP Keccak Farfalle: Encrypt and decrypt data based on Farfalle

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Version License PHP version Categories
kravatte 1.0The PHP License5PHP 5, Cryptography
Description Author

This class can encrypt, decrypt and authenticate data based on Keccak Farfalle modes.

It can take data and computes a hash using a given secret key using Farfalle.

The class can also encrypt and decrypt data with a given key also using Farfalle modes.

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Kravatte is a function that implements a cryptography approach that can be used to encrypt data incrementally as a sequence of blocks of data that can be appended to the encryption output.

This approach is useful when you need to encrypt a stream of data with a length that is unknown initially.

This class implements a pure PHP based solution to encrypt and decrypt data using the Kravatte Farfalle construction.

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Details

Kravatte

PHP-Kravatte Achouffe Cipher Suite: Encryption, Decryption, and Authentication Tools based on the Farfalle modes

Based on this Python implementation with minor changes https://github.com/inmcm/kravatte

Kravatte is a high-speed instance of Farfalle based on Keccak-p[1600] permutations, claimed to resist against classical and quantum adversaries. Modes for authentication, encryption and authenticated encryption are defined accordingly.

https://keccak.team/2017/updated_farfalle_kravatte.html https://eprint.iacr.org/2016/1188.pdf

It pass all tests from https://github.com/inmcm/kravatte/tree/master/tests

2021 @denobispsis

$x=new Kravatte;

MAC

$x->mac('Supersecreto', 'Et in Arcadia ego', 64)

SANE

$x->Kravatte_SANE($nonce,$key);

$cipher = $x->Kravatte_SANE_enc($message, $metadata);

[$cipher, $val]

$x->Kravatte_SANE($nonce,$key);

$plain = $x->Kravatte_SANE_dec(pack("H",$cipher[0]), $meta, pack("H",$cipher[1]));

[$message, $val]

SANSE

$x->Kravatte_SANSE($key);

$cipher = $x->Kravatte_SANSE_enc($message, $metadata);

[$cipher, $val]

$x->Kravatte_SANSE($key);

$plain = $x->Kravatte_SANSE_dec(pack("H",$cipher[0]), $meta, pack("H",$cipher[1]));

[$message, $val]

WBC

$x->Kravatte_WBC(strlen($message), $tweak,$key);

$cipher = $x->Kravatte_WBC_enc($message);
	
$x->Kravatte_WBC(strlen($message), $tweak,$key);

$message = $x->Kravatte_WBC_dec(pack("H*",$cipher));

WBC_AE

$x->Kravatte_WBC_AE(strlen($message), $key);

$cipher = $x->Kravatte_WBC_AE_enc($message,$metadata);

$x->Kravatte_WBC_AE(strlen($message),$key);

$plain = $x->Kravatte_WBC_AE_dec(pack("H*",$cipher),$metadata);

Oracle

$x->KravatteOracle($message, $key);

$x->random($size);

  Files folder image Files  
File Role Description
Plain text file kravatte_final.php Class Class source
Accessible without login Plain text file README.md Doc. Documentation
Accessible without login Plain text file test_kravatte.php Example Example script

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