paragonie / hpkp-builder

Build HTTP Public-Key-Pinning headers from a JSON file (or build them programmatically)

HTTP Public-Key-Pinning Builder

This library aims to make it easy to build HTTP Public-Key-Pinning headers in your PHP projects. HPKP Builder was was created by Paragon Initiative Enterprises as part of our effort to encourage better application security practices.

Check out our other open source projects too.

PHP Version requirements

• PHP 7.0 or newer

Build a Public-Key-Pinning header from a JSON configuration file

<?php

use \ParagonIE\HPKPBuilder\HPKPBuilder;

$hpkp = HPKPBuilder::fromFile('/path/to/source.json');
$hpkp->sendHPKPHeader();

Example JSON configuration

{
    "hashes": [
        {
            "algo": "sha256",
            "hash": "hwGEkxDWJ2oHtKv6lsvylKvhotXAAZQR1e0nq0eb2Vw="
        },
        {
            "algo": "sha256",
            "hash": "0jum0Eiu4Eg6vjn3zTmyd/RobfN6e4EagFQcz6E5ZKI="
        }
    ],
    "include-subdomains": false,
    "max-age": 5184000,
    "report-only": false,
    "report-uri": null
}

Build a Public-Key-Pinning Header

<?php

use \ParagonIE\HPKPBuilder\HPKPBuilder;

$hpkp = (new HPKPBuilder)
    ->addHash('hwGEkxDWJ2oHtKv6lsvylKvhotXAAZQR1e0nq0eb2Vw=')
    ->addHash('0jum0Eiu4Eg6vjn3zTmyd/RobfN6e4EagFQcz6E5ZKI=')
    ->addHash('JDR7yv7lvdKaM26fnKriSPiyryeYw9qi5sO8Ot7SNUQ=')
    ->includeSubdomains(true)
    ->reportOnly(true)
    ->reportUri('https://report-uri.io')
    ->sendHPKPHeader();