org.mitre.jose.jwk.RSAKeyMaker Maven / Gradle / Ivy

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/**
 * 
 */
package org.mitre.jose.jwk;

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;

import com.nimbusds.jose.Algorithm;
import com.nimbusds.jose.jwk.KeyUse;
import com.nimbusds.jose.jwk.RSAKey;

/**
 * @author jricher
 *
 */
public class RSAKeyMaker {

	/**
	 * @param keySize
	 * @param keyUse
	 * @param keyAlg
	 * @param kid
	 * @return
	 */
    public static RSAKey make(Integer keySize, KeyUse keyUse, Algorithm keyAlg, String kid) {
    	
    	try {
	        KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
	        generator.initialize(keySize);
	        KeyPair kp = generator.generateKeyPair();
	        
	        RSAPublicKey pub = (RSAPublicKey) kp.getPublic();
	        RSAPrivateKey priv = (RSAPrivateKey) kp.getPrivate();

			RSAKey rsaKey = new RSAKey.Builder(pub)
						.privateKey(priv)
						.keyUse(keyUse)
						.algorithm(keyAlg)
						.keyID(kid)
						.build();

			return rsaKey;
        } catch (NoSuchAlgorithmException e) {
	        // TODO Auto-generated catch block
	        e.printStackTrace();
	        return null;
        }
    }
}