com.github.flysium.io.yew.common.crypto.impl.PBKDF2WithHmacSHA1 Maven / Gradle / Ivy
/*
* Copyright 2018-2025 the original author or authors.
*
* 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 com.github.flysium.io.yew.common.crypto.impl;
import com.github.flysium.io.yew.common.crypto.AbstractPBESpec;
import com.github.flysium.io.yew.common.crypto.SecretSpi;
import com.github.flysium.io.yew.common.crypto.support.CryptoUtil;
import java.security.Provider;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
/**
* PBKDF2
*
*
* Constructs secret keys using the Password-Based Key Derivation Function function found in PKCS #5
* v2.0.
*
* @author Sven Augustus
* @version 1.0
* @since JDK 1.7
*/
public class PBKDF2WithHmacSHA1 extends AbstractPBESpec implements SecretSpi {
/**
* default algorithm
*/
private static final String DEFAULT_ALGORITHM = "PBKDF2WithHmacSHA1";
private int keyLength = 128;
public PBKDF2WithHmacSHA1() {
super(DEFAULT_ALGORITHM, null);
}
public PBKDF2WithHmacSHA1(Provider provider) {
super(DEFAULT_ALGORITHM, provider);
}
public PBKDF2WithHmacSHA1(int keyLength) {
this();
this.keyLength = keyLength;
}
@Override
public byte[] encrypt(char[] plainText) {
AlgorithmParameterSpec parameterSpec = this.getAlgorithmParameterSpec();
if (!(parameterSpec instanceof PBEParameterSpec)) {
fail(new Exception("Invalid AlgorithmParameterSpec!"));
return new byte[0];
}
PBEParameterSpec pbeParameterSpec = (PBEParameterSpec) parameterSpec;
byte[] salt = pbeParameterSpec.getSalt();
int iterationCount = pbeParameterSpec.getIterationCount();
SecretKeyFactory factory = CryptoUtil.getSecretKeyFactory(algorithm, provider);
try {
if (factory != null) {
KeySpec spec = new PBEKeySpec(plainText, salt, iterationCount, this.keyLength);
return factory.generateSecret(spec).getEncoded();
}
} catch (InvalidKeySpecException e) {
fail(e);
}
return new byte[0];
}
}