/**
* JBoss, Home of Professional Open Source
* Copyright Red Hat, Inc., and individual contributors.
*
* 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.jboss.aerogear.crypto.password;
import org.jboss.aerogear.crypto.Random;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.Arrays;
import static org.jboss.aerogear.AeroGearCrypto.DERIVED_KEY_LENGTH;
import static org.jboss.aerogear.AeroGearCrypto.ITERATIONS;
import static org.jboss.aerogear.AeroGearCrypto.MINIMUM_ITERATION;
import static org.jboss.aerogear.AeroGearCrypto.MINIMUM_SALT_LENGTH;
import static org.jboss.aerogear.crypto.Util.checkLength;
import static org.jboss.aerogear.crypto.Util.checkSize;
public class DefaultPbkdf2 implements Pbkdf2 {
private byte[] salt;
private SecretKeyFactory secretKeyFactory;
public DefaultPbkdf2(SecretKeyFactory keyFactory) {
this.secretKeyFactory = keyFactory;
}
@Override
public byte[] encrypt(String password, byte[] salt, int iterations) throws InvalidKeySpecException {
this.salt = checkLength(salt, MINIMUM_SALT_LENGTH);
iterations = checkSize(iterations, MINIMUM_ITERATION);
KeySpec spec = new PBEKeySpec(password.toCharArray(), salt, iterations, DERIVED_KEY_LENGTH);
return secretKeyFactory.generateSecret(spec).getEncoded();
}
@Override
public SecretKey generateSecretKey(String password, byte[] salt, int iterations) throws InvalidKeySpecException {
this.salt = checkLength(salt, MINIMUM_SALT_LENGTH);
iterations = checkSize(iterations, MINIMUM_ITERATION);
KeySpec spec = new PBEKeySpec(password.toCharArray(), salt, iterations, DERIVED_KEY_LENGTH);
return secretKeyFactory.generateSecret(spec);
}
@Override
public byte[] encrypt(String password, byte[] salt) throws InvalidKeySpecException {
return encrypt(password, salt, ITERATIONS);
}
@Override
public byte[] encrypt(String password) throws InvalidKeySpecException {
byte[] salt = new Random().randomBytes();
return encrypt(password, salt);
}
@Override
public SecretKey generateSecretKey(String password) throws InvalidKeySpecException {
byte[] salt = new Random().randomBytes();
return generateSecretKey(password, salt, ITERATIONS);
}
@Override
public boolean validate(String password, byte[] encryptedPassword, byte[] salt) throws InvalidKeySpecException {
byte[] attempt = encrypt(password, salt);
return Arrays.equals(encryptedPassword, attempt);
}
public byte[] getSalt() {
return salt;
}
}