/**
* before_request
* Hook for PHP Requests
*
* @param $url
* @param $headers
* @param $data
*/
public function before_request(&$url, &$headers, &$data)
{
// generate a date string
$date = new \DateTime('NOW', new \DateTimeZone("GMT"));
$headers['Date'] = $date->format("D, d M Y H:i:s \\G\\M\\T");
// build up the data to be signed
$request_data = $headers['Date'] . "\n" . $url . "\n";
if (!empty($data)) {
$request_data .= http_build_query($data);
}
// get a signature for our request
// private key is in hex form, needs to be converted into PrivateKey Object
$generator = EccFactory::getNistCurves()->generator256();
$private_key = new PrivateKey($this->math_adapter, $generator, $this->math_adapter->hexDec($this->private_key));
$hash = $this->math_adapter->hexDec(hash("sha256", $request_data));
$signer = EccFactory::getSigner();
$randomK = RandomGeneratorFactory::getRandomGenerator()->generate($private_key->getPoint()->getOrder());
$signatureObj = $signer->sign($private_key, $hash, $randomK);
$signature = $this->math_adapter->decHex($signatureObj->getR()) . $this->math_adapter->decHex($signatureObj->getS());
// apply the HTTP headers and send the request
$headers['X-Service'] = $this->service_name;
$headers['X-Signature'] = $signature;
if ($this->debug) {
echo "\n\nRequest Data\n\n";
echo "URL:\n";
var_dump($url);
echo "HEADERS:\n";
var_dump($headers);
echo "DATA:\n";
var_dump($data);
}
}
/**
* Pkcs8PrivateKey constructor.
* @param GmpMathInterface $math
* @param DigestParamsInterface $kdfParams
* @param CipherParamsInterface $cipherParams
* @param PrivateKeyInterface $privateKey
*/
public function __construct(GmpMathInterface $math, DigestParamsInterface $kdfParams, CipherParamsInterface $cipherParams, PrivateKeyInterface $privateKey)
{
$this->kdfParams = $kdfParams;
$this->cipherParams = $cipherParams;
parent::__construct($math, $privateKey->getPoint(), $privateKey->getSecret());
}
