function sign($data, $privateKeyRaw = NULL)
{
if ($privateKeyRaw == null) {
global $thisEntity;
// Load the private key if needed (from a hex string):
if (!isset($thisEntity['PrivateKeyBytes'])) {
// Load it now:
$thisEntity['PrivateKeyBytes'] = hex2bin($thisEntity['PrivateKey']);
}
// Grab the raw private key (bytes):
$privateKeyRaw = $thisEntity['PrivateKeyBytes'];
}
// Get the double hash of the data:
$msg32 = hash('sha256', hash('sha256', $data, true), true);
// Create a context:
$ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN);
// Sign:
$signature;
if (secp256k1_ecdsa_sign($ctx, $msg32, $privateKeyRaw, $signature) != 1) {
// This is a 500 error. Unable to sign.
serverError();
}
// Serialize the signature:
$serialized = '';
secp256k1_ecdsa_signature_serialize_der($ctx, $signature, $serialized);
return $serialized;
}
/**
* @param PrivateKeyInterface $privateKey
* @param Buffer $messageHash
* @param RbgInterface $rbgInterface
* @return Signature
* @throws \Exception
*/
public function sign(Buffer $messageHash, PrivateKeyInterface $privateKey, RbgInterface $rbgInterface = null)
{
$sigStr = '';
$ret = \secp256k1_ecdsa_sign($messageHash->getBinary(), $privateKey->getBuffer()->getBinary(), $sigStr);
if ($ret !== 1) {
throw new \Exception('Secp256k1-php failed to sign data');
}
return SignatureFactory::fromHex(bin2hex($sigStr));
}
/**
* @param BufferInterface $msg32
* @param PrivateKey $privateKey
* @return Signature
*/
private function doSign(BufferInterface $msg32, PrivateKey $privateKey)
{
/** @var resource $sig_t */
$sig_t = '';
if (1 !== secp256k1_ecdsa_sign($this->context, $msg32->getBinary(), $privateKey->getBinary(), $sig_t)) {
throw new \RuntimeException('Secp256k1: failed to sign');
}
$derSig = '';
secp256k1_ecdsa_signature_serialize_der($this->context, $sig_t, $derSig);
$rL = ord($derSig[3]);
$r = (new Buffer(substr($derSig, 4, $rL), $rL, $this->math))->getInt();
$sL = ord($derSig[4 + $rL + 1]);
$s = (new Buffer(substr($derSig, 4 + $rL + 2, $sL), $rL, $this->math))->getInt();
return new Signature($this, $r, $s, $sig_t);
}
/**
* @dataProvider getErroneousTypeVectors
* @expectedException \PHPUnit_Framework_Error_Warning
*/
public function testErroneousTypes($context, $msg32, $private)
{
$sig = '';
\secp256k1_ecdsa_sign($context, $sig, $msg32, $private);
}
