/**
* Sign hex data deterministically using deterministic k.
*
* @param string $hexDataToSign
* @param PrivateKeyInterface|string $privateKey
* @return string
*/
public static function sign($hexDataToSign, $privateKey)
{
if (is_string($privateKey)) {
$privateKey = PrivateKeyManipulator::importPrivateKey($privateKey);
}
// Convert hex data to buffer
$data = Buffer::hex($hexDataToSign);
/** @var EcAdapterInterface $ecAdapter */
$ecAdapter = Bitcoin::getEcAdapter();
// Deterministic digital signature generation
$k = new Rfc6979($ecAdapter, $privateKey, $data, 'sha256');
$sig = $ecAdapter->sign($data, $privateKey, $k);
// DEBUG
//echo "hexDataToSign: <br/>";
//var_dump($hexDataToSign);
//echo "sig: <br/>";
//var_dump($sig->getHex());
return $sig->getHex();
}
/**
* @test
*/
public function should_allow_sign_data_with_private_key()
{
$privateKey = PrivateKeyManipulator::importPrivateKey(self::PRIVATE_KEY);
$signature = Signer::sign(self::TO_SIGN, $privateKey);
$this->assertEquals(self::SIGNATURE, $signature);
}
/**
* @test
* @expectedException \InvalidArgumentException
*/
public function should_throw_an_exception_importing_a_private_key_with_invalid_format()
{
PrivateKeyManipulator::importPrivateKey('INVALID PRIVATE KEY');
}
