Viewing file:  signatureValidation.php (984 B) -rw-r--r--
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<?php
namespace Plivo\Util;
/**
* Class signatureValidation
* @package Plivo\Util
*/
class signatureValidation
{
/**
* Return an array without keys with null values
*
* @param array $array
* @return array
*/
public static function validateSignature($uri, $nonce, $signature, $auth_token='')
{
$nonce = utf8_encode($nonce);
$signature = utf8_encode($signature);
$auth_token = utf8_encode($auth_token);
$uri = utf8_encode($uri);
$port = '';
$parsed_uri = parse_url($uri);
$base_url = $parsed_uri['scheme'].'://'.$parsed_uri['host'];
if (isset($parsed_uri['port'])) {
$base_url .= ':'.$parsed_uri['port'];
}
if (isset($parsed_uri['path'])) {
$base_url .= $parsed_uri['path'];
}
$hmac = hash_hmac('SHA256', $base_url.$nonce, $auth_token, true);
$authentication_string = base64_encode($hmac);
return $authentication_string == $signature;
}
}
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