FIANET / Certissim SHA1 + HMAC signature

fianet_sha1_hmac.php

#!/usr/bin/php
<?php

// Check http://cl.ly/2o0z0z1G103O for documentation on Certissim's HMAC SHA1

// First parameter = hexadecimal key
$key_hex = $argv[1];

// Second = string to get signature
$payload = $argv[2];

// Convert to binary string
$key_bytes = pack('H*', $key_hex);

// SHA1 with binary string key
$auth = hash_hmac('sha1', $payload, $key_bytes, FALSE);

echo $auth;

?>