How to use

getAlgorithm

method

in

java.security.interfaces.RSAPrivateKey

/**
 * Sign a message and base64 encode the signature.
 */
public String sign(String msg) {
  try {
    RSAPrivateKey key = getPrivateKey();
    Signature sig = Signature.getInstance(SIGNING_ALGORITHM + "with" + key.getAlgorithm());
    sig.initSign(key);
    sig.update(msg.getBytes("UTF-8"));
    return hudson.remoting.Base64.encode(sig.sign());
  } catch (GeneralSecurityException e) {
    throw new SecurityException(e);
  } catch (UnsupportedEncodingException e) {
    throw new AssertionError(e);    // UTF-8 is mandatory
  }
}

/**
 * Sign a message and base64 encode the signature.
 */
public String sign(String msg) {
  try {
    RSAPrivateKey key = getPrivateKey();
    Signature sig = Signature.getInstance(SIGNING_ALGORITHM + "with" + key.getAlgorithm());
    sig.initSign(key);
    sig.update(msg.getBytes("UTF-8"));
    return hudson.remoting.Base64.encode(sig.sign());
  } catch (GeneralSecurityException e) {
    throw new SecurityException(e);
  } catch (UnsupportedEncodingException e) {
    throw new AssertionError(e);    // UTF-8 is mandatory
  }
}