Shamir PHP implementation

1.0.0 2021-09-29 16:15 UTC

This package is not auto-updated.

Last update: 2022-01-20 09:10:52 UTC


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PHP Shamir's Secret Sharing implementation. Inspired by hashicorp vault shamir. Compatible with Simple Shamir's Secret Sharing (s4).


  • PHP 7.4 or higher.


The package could be installed with composer:

composer require unitpay/shamir --prefer-dist


Split secret to parts with threshold

$secret = 'Some super secret';
$parts = 5;
$threshold = 3;
$shares = Shamir::split($secret, $parts, $threshold);

Reconstruct shares

$recoveredSecret = Shamir::reconstruct([$parts[1], $parts[0], $parts[3]]);


Unit testing

The package is tested with PHPUnit. To run tests:


Mutation testing

The package tests are checked with Infection mutation framework with Infection Static Analysis Plugin. To run it:


Static analysis

The code is statically analyzed with Psalm. To run static analysis:



It is released under the terms of the MIT License. Please see LICENSE for more information.

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