/*
* Copyright 2012-2014 Brian Campbell
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jose4j.keys;
import org.jose4j.lang.JoseException;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.RSAPrivateCrtKeySpec;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;
/**
*/
public class RsaKeyUtil extends KeyPairUtil
{
public static final String RSA = "RSA";
@Override
String getAlgorithm()
{
return RSA;
}
public RSAPublicKey publicKey(BigInteger modulus, BigInteger publicExponent) throws JoseException
{
RSAPublicKeySpec rsaPublicKeySpec = new RSAPublicKeySpec(modulus, publicExponent);
try
{
PublicKey publicKey = getKeyFactory().generatePublic(rsaPublicKeySpec);
return (RSAPublicKey) publicKey;
}
catch (InvalidKeySpecException e)
{
throw new JoseException("Invalid key spec: " + e, e);
}
}
public RSAPrivateKey privateKey(BigInteger modulus, BigInteger privateExponent) throws JoseException
{
RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(modulus, privateExponent);
return getRsaPrivateKey(keySpec);
}
public RSAPrivateKey privateKey(BigInteger modulus, BigInteger publicExponent, BigInteger privateExponent, BigInteger primeP,
BigInteger primeQ, BigInteger primeExponentP, BigInteger primeExponentQ,
BigInteger crtCoefficient) throws JoseException
{
RSAPrivateCrtKeySpec keySpec = new RSAPrivateCrtKeySpec(modulus,
publicExponent, privateExponent, primeP, primeQ, primeExponentP, primeExponentQ, crtCoefficient);
return getRsaPrivateKey(keySpec);
}
public RSAPrivateKey getRsaPrivateKey(RSAPrivateKeySpec keySpec) throws JoseException
{
try
{
PrivateKey privateKey = getKeyFactory().generatePrivate(keySpec);
return (RSAPrivateKey) privateKey;
}
catch (InvalidKeySpecException e)
{
throw new JoseException("Invalid key spec: " + e, e);
}
}
public KeyPair generateKeyPair(int bits) throws JoseException
{
KeyPairGenerator keyGenerator = getKeyPairGenerator();
keyGenerator.initialize(bits);
return keyGenerator.generateKeyPair();
}
}