All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.dromara.hutool.crypto.asymmetric.RSA Maven / Gradle / Ivy

There is a newer version: 6.0.0.M3
Show newest version
/*
 * Copyright (c) 2013-2024 Hutool Team and hutool.cn
 *
 * 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.dromara.hutool.crypto.asymmetric;

import org.dromara.hutool.crypto.CryptoException;
import org.dromara.hutool.crypto.provider.GlobalProviderFactory;
import org.dromara.hutool.crypto.KeyUtil;

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.interfaces.RSAKey;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;

/**
 * 

* RSA公钥/私钥/签名加密解密 *

*

* 罗纳德·李维斯特(Ron [R]ivest)、阿迪·萨莫尔(Adi [S]hamir)和伦纳德·阿德曼(Leonard [A]dleman) *

*

* 由于非对称加密速度极其缓慢,一般文件不使用它来加密而是使用对称加密,
* 非对称加密算法可以用来对对称加密的密钥加密,这样保证密钥的安全也就保证了数据的安全 *

* * @author Looly * */ public class RSA extends AsymmetricCrypto { private static final long serialVersionUID = 1L; /** 默认的RSA算法 */ private static final AsymmetricAlgorithm ALGORITHM_RSA = AsymmetricAlgorithm.RSA_ECB_PKCS1; // ------------------------------------------------------------------ Static method start /** * 生成RSA私钥 * * @param modulus N特征值 * @param privateExponent d特征值 * @return {@link PrivateKey} */ public static PrivateKey generatePrivateKey(final BigInteger modulus, final BigInteger privateExponent) { return KeyUtil.generatePrivateKey(ALGORITHM_RSA.getValue(), new RSAPrivateKeySpec(modulus, privateExponent)); } /** * 生成RSA公钥 * * @param modulus N特征值 * @param publicExponent e特征值 * @return {@link PublicKey} */ public static PublicKey generatePublicKey(final BigInteger modulus, final BigInteger publicExponent) { return KeyUtil.generatePublicKey(ALGORITHM_RSA.getValue(), new RSAPublicKeySpec(modulus, publicExponent)); } // ------------------------------------------------------------------ Static method end // ------------------------------------------------------------------ Constructor start /** * 构造,生成新的私钥公钥对 */ public RSA() { super(ALGORITHM_RSA); } /** * 构造,生成新的私钥公钥对 * * @param rsaAlgorithm 自定义RSA算法,例如RSA/ECB/PKCS1Padding */ public RSA(final String rsaAlgorithm) { super(rsaAlgorithm); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param privateKeyStr 私钥Hex或Base64表示 * @param publicKeyStr 公钥Hex或Base64表示 */ public RSA(final String privateKeyStr, final String publicKeyStr) { super(ALGORITHM_RSA, privateKeyStr, publicKeyStr); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param rsaAlgorithm 自定义RSA算法,例如RSA/ECB/PKCS1Padding * @param privateKeyStr 私钥Hex或Base64表示 * @param publicKeyStr 公钥Hex或Base64表示 * @since 4.5.8 */ public RSA(final String rsaAlgorithm, final String privateKeyStr, final String publicKeyStr) { super(rsaAlgorithm, privateKeyStr, publicKeyStr); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param privateKey 私钥 * @param publicKey 公钥 */ public RSA(final byte[] privateKey, final byte[] publicKey) { super(ALGORITHM_RSA, privateKey, publicKey); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param modulus N特征值 * @param privateExponent d特征值 * @param publicExponent e特征值 * @since 3.1.1 */ public RSA(final BigInteger modulus, final BigInteger privateExponent, final BigInteger publicExponent) { this(generatePrivateKey(modulus, privateExponent), generatePublicKey(modulus, publicExponent)); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param privateKey 私钥 * @param publicKey 公钥 * @since 3.1.1 */ public RSA(final PrivateKey privateKey, final PublicKey publicKey) { super(ALGORITHM_RSA, privateKey, publicKey); } /** * 构造
* 私钥和公钥同时为空时生成一对新的私钥和公钥
* 私钥和公钥可以单独传入一个,如此则只能使用此钥匙来做加密或者解密 * * @param rsaAlgorithm 自定义RSA算法,例如RSA/ECB/PKCS1Padding * @param keyPair 密钥对,{@code null}表示随机生成 */ public RSA(final String rsaAlgorithm, final KeyPair keyPair) { super(rsaAlgorithm, keyPair); } // ------------------------------------------------------------------ Constructor end @Override public byte[] encrypt(final byte[] data, final KeyType keyType) { // 在非使用BC库情况下,blockSize使用默认的算法 if (this.encryptBlockSize < 0 && null == GlobalProviderFactory.getProvider()) { // 加密数据长度 <= 模长-11 this.encryptBlockSize = ((RSAKey) getKeyByType(keyType)).getModulus().bitLength() / 8 - 11; } return super.encrypt(data, keyType); } @Override public byte[] decrypt(final byte[] bytes, final KeyType keyType) { // 在非使用BC库情况下,blockSize使用默认的算法 if (this.decryptBlockSize < 0 && null == GlobalProviderFactory.getProvider()) { // 加密数据长度 <= 模长-11 this.decryptBlockSize = ((RSAKey) getKeyByType(keyType)).getModulus().bitLength() / 8; } return super.decrypt(bytes, keyType); } @Override protected void initCipher() { try { super.initCipher(); } catch (final CryptoException e) { final Throwable cause = e.getCause(); if(cause instanceof NoSuchAlgorithmException) { // 在Linux下,未引入BC库可能会导致RSA/ECB/PKCS1Padding算法无法找到,此时使用默认算法 this.algorithm = AsymmetricAlgorithm.RSA.getValue(); super.initCipher(); } throw e; } } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy