/**
* {@inheritDoc}
* @see \Mdanter\Ecc\Serializer\PrivateKeySerializerInterface::serialize()
*/
public function serialize(PrivateKeyInterface $key)
{
$privateKeyInfo = $this->derSerializer->serialize($key);
$content = '-----BEGIN EC PRIVATE KEY-----' . PHP_EOL;
$content .= trim(chunk_split(base64_encode($privateKeyInfo), 64, PHP_EOL)) . PHP_EOL;
$content .= '-----END EC PRIVATE KEY-----';
return $content;
}
/**
* @param EncryptedPrivateKey $key
* @param string $password
* @return string
*/
public function serialize(EncryptedPrivateKey $key, $password)
{
$privateKey = $key->getKey();
$iv = $key->getIv();
$method = $key->getMethod();
$plaintext = $this->derSerializer->serialize($privateKey);
$key = md5($password . substr($iv, 0, 8), true);
$ciphertext = openssl_encrypt($plaintext, $method, $key, OPENSSL_RAW_DATA, $iv);
if (false === $ciphertext) {
throw new \RuntimeException('Failed to encrypt key');
}
return "-----BEGIN EC PRIVATE KEY-----" . "\n" . "Proc-Type: 4,ENCRYPTED" . "\n" . "DEK-Info: " . strtoupper($method) . "," . strtoupper(unpack("H*", $iv)[1]) . "\n\n" . implode("\n", str_split(base64_encode($ciphertext), 64)) . "\n" . "-----END EC PRIVATE KEY-----";
}
/**
* @return Binary
*/
public function generateKey()
{
$generator = EccFactory::getNistCurves()->generator256();
$key = $generator->createPrivateKey();
$serializer = new DerPrivateKeySerializer();
$serialized = $serializer->serialize($key);
return new Binary($serialized);
}
/**
* {@inheritDoc}
* @see \Mdanter\Ecc\Serializer\PrivateKeySerializerInterface::serialize()
*/
public function getPrivateKeyInfo(PrivateKeyInterface $key)
{
$keyData = $this->serializer->serialize($key);
$privateKeyInfo = new Sequence(new Integer(self::VERSION), new Sequence(new ObjectIdentifier(DerPublicKeySerializer::X509_ECDSA_OID), CurveOidMapper::getCurveOid($key->getPoint()->getCurve())), new OctetString(bin2hex($keyData)));
return $privateKeyInfo;
}
