/**
* @param PrivateKey $private_key
* @param string $message
* @return string
* @throws InvalidKeyLengthAlgorithmException
* @throws InvalidKeyTypeAlgorithmException
*/
public function sign(PrivateKey $private_key, $message)
{
if (!$private_key instanceof RSAPrivateKey) {
throw new InvalidKeyTypeAlgorithmException();
}
if ($this->getMinKeyLen() > $private_key->getBitLength()) {
throw new InvalidKeyLengthAlgorithmException(sprintf('min len %s - cur len %s.', $this->getMinKeyLen(), $private_key->getBitLength()));
}
$res = $this->rsa_impl->loadKey($private_key->getEncoded());
if (!$res) {
throw new InvalidKeyTypeAlgorithmException();
}
$this->rsa_impl->setHash($this->getHashingAlgorithm());
$this->rsa_impl->setMGFHash($this->getHashingAlgorithm());
$this->rsa_impl->setSignatureMode($this->getPaddingMode());
return $this->rsa_impl->sign($message);
}
/**
* @param PrivateKey $private_key
* @return IAsymmetricJWK|null
* @throws InvalidJWKType
*/
public static function fromPrivateKey(PrivateKey $private_key)
{
if (!$private_key instanceof RSAPrivateKey) {
throw new InvalidJWKType();
}
$jwk = new RSAJWK();
$jwk->private_key = $private_key;
$jwk->set[RSAKeysParameters::Exponent] = Base64urlUInt::fromBigInt($private_key->getPublicExponent());
$jwk->set[RSAKeysParameters::Modulus] = Base64urlUInt::fromBigInt($private_key->getModulus());
$jwk->set[RSAKeysParameters::PrivateExponent] = Base64urlUInt::fromBigInt($private_key->getPrivateExponent());
return $jwk;
}
