A script to create an authorization string to connect with the Buckaroo JSON API.

buckaroo-json-api-authorization.php

<?php
$websiteKey = 'website-key';
$secretToken = 'secret-token';
$nonce = 'a-random-alphanumeric-string';
$requestBody = "{json: 'request'}";
$time = (string)time();

$parts =  [
    $websiteKey,
    strtoupper('post or get'),
    strtolower(urlencode('you-website.com/path/to/destination')),
    $time,
    $nonce,
    $requestBody
        ? base64_encode(md5($requestBody, true))
        : ''
];

$authorization = 'hmac ' . $websiteKey;
$authorization .= ':' . base64_encode(hash_hmac('sha256', implode('', $parts), $secretToken, true));
$authorization .= ':' . $nonce;
$authorization .= ':' . $time;