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Example code of brainfoolong/php-ascon

Informations about the package php-ascon

PHP Implementation of Ascon

Tests

This is a PHP implementation of Ascon v1.3, an authenticated cipher and hash function. It allows to encrypt and decrypt any kind of message. Includes the authenticated encryption and hash function variants as specified in NIST SP 800-232 (initial public draft). Heavily inspired by the python implementation of Ascon by https://github.com/meichlseder/pyascon

Notice: This library does contain the version 1.3 of Ascon. v1.2 was a draft version and there are already newer versions of ascon. See https://github.com/ascon/ascon-c . Version 1.2 is not compatible with 1.3

About Ascon

Ascon is a family of authenticated encryption (AEAD) and hashing algorithms designed to be lightweight and easy to implement, even with added countermeasures against side-channel attacks. It was designed by a team of cryptographers from Graz University of Technology, Infineon Technologies, and Radboud University: Christoph Dobraunig, Maria Eichlseder, Florian Mendel, and Martin Schläffer.

Ascon has been selected as the standard for lightweight cryptography in the NIST Lightweight Cryptography competition (2019–2023) and as the primary choice for lightweight authenticated encryption in the final portfolio of the CAESAR competition (2014–2019).

Find more information, including the specification and more implementations here:

https://ascon.iaik.tugraz.at/

About me

I have made library for AES PHP/JS encryption already in the past. Bit juggling is somewhat cool, in a really nerdy way. I like the Ascon implementation and it at the time of writing, a PHP implementation was missing. So i made one. Would be cool if you leave a follow or spend some virtual coffee. s

Javascript/Typescript Implementation

Chances are high that you probably need a Javascript/Typescript (For your frontend) implementation too. I've made one here -> https://github.com/brainfoolong/js-ascon

Installation

# via composer
composer require brainfoolong/php-ascon

Performance

As PHP do not support unsigned integers, there is no chance to directly work with 64bit unsigned integers. This library use 2x 32bit integers for all bit operations, which have performance penalties (almost half as fast as the typescript implementation). Without requiring specials php extensions which can handle 64bit unsigned integers, there is no way to improve the performance for now.

Usage

For more demos see in folder demo.

Development

Change code in src/Ascon.php. Test changes with php tests/tests.php.

Algorithms

This is a simple reference implementation of Ascon as specified in NIST's draft standard, NIST SP 800-232, which includes

Older Algorithm Variants

Older versions implement Ascon v1.2 as submitted to the NIST LWC competition and published in the Journal of Cryptology, as well as additional functionality for message authentication. These versions can be found in at https://github.com/brainfoolong/php-ascon/tree/412dd162b737c212829c95787e7a4801fec7629e, including

All versions of php-ascon with dependencies

PHP Build Version
Package Version
Requires php Version >=8.0.0
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