基于hutool造一个加解密轮子

前提

• 搭建springboot项目
• 引入hutool依赖
• 建议引入lombok依赖

相关代码

1. 依赖

xml

<!-- 注意修改版本信息 -->
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>${最新版本}</version>
</dependency>

2. 生成密钥代码

java
/**
 * 生成对称密钥
 *
 * @return {@link String}
 */
public static String genKey() {
    // 对称加密，随机生成128位加密密钥，
    // 注，密钥长度必须是二进制的128位/192位或256位，jdk默认是128位，如果要使用更高位加密，
    // 请先下载并安装 Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files
    byte[] keyBytes = SecureUtil.generateKey("AES").getEncoded();
    return HexUtil.encodeHexStr(keyBytes);
}

/**
 * 生成非对称密钥对
 *
 * @return {@link Map}<{@link String}, {@link String}>
 */
public static Map<String, String> genKeyPair() {
    Map<String, String> result = Maps.newHashMap();
    KeyPair keyPair = SecureUtil.generateKeyPair("RSA", 2048);
    result.put("pub_key", Base64.encode(keyPair.getPublic().getEncoded()));
    result.put("pri_key", Base64.encode(keyPair.getPrivate().getEncoded()));
    return result;
}

3. 完整工具类

java
package com.code.generator.util;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.HexUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.crypto.SecureUtil;
import cn.hutool.crypto.asymmetric.KeyType;
import cn.hutool.crypto.asymmetric.RSA;
import cn.hutool.crypto.symmetric.AES;
import com.google.common.collect.Maps;
import lombok.extern.slf4j.Slf4j;

import java.nio.charset.StandardCharsets;
import java.security.KeyPair;
import java.util.Map;

/**
 * SEC Util
 * 加密相关工具
 *
 * @author JACK WEI
 * @date 2024/01/14
 */
@Slf4j
public class SecUtil {

    // 该值由于生成密钥代码产生，建议放在配置文件中
    private final static String KEY = "61D4B243CB93511D5238BC1BABA17C61";

    private final static AES aes = new AES(KEY.getBytes(StandardCharsets.UTF_8));

    private final static String PRI_KEY = "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";
    private final static String PUB_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxPL//LBQa//m/1DDRBGVNxkKjyFBtzJT/3g3WWy5TzMyy+Jj4LX/1CdD8GOX2SMB2Bq9ek1UhcLNtzwKuNl24Yr/Run+nse9F4SC+rBO4muj/ZWzka7fbD8cn5pZFFcwGJC2tMBwNyEJbl2oAWgKAVe/xd4qlz5bxj1unPWsvNuk0535TiS/9euK/rmxZE8UV+nSDeUo6JgZ9QmcswhXrNiJA9SX1lN9isYfwfKM4sfUfpBKlKUpRMyMR6svsKV71RqJbIiwGY1zoOIf/nAo8iLKPPqIrPMDj24LeFcb234prU04KWnOdnELU8PAmDdA2T+Jqzn6k6iDXLiTZIC5BQIDAQAB";

    private final static RSA rsa = new RSA(PRI_KEY, PUB_KEY);


    /**
     * 生成对称密钥
     *
     * @return {@link String}
     */
    public static String genKey() {
        // 对称加密，随机生成128位加密密钥，
        // 注，密钥长度必须是二进制的128位/192位或256位，jdk默认是128位，如果要使用更高位加密，
        // 请先下载并安装 Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files
        byte[] keyBytes = SecureUtil.generateKey("AES").getEncoded();
        return HexUtil.encodeHexStr(keyBytes);
    }

    /**
     * 生成非对称密钥对
     *
     * @return {@link Map}<{@link String}, {@link String}>
     */
    public static Map<String, String> genKeyPair() {
        Map<String, String> result = Maps.newHashMap();
        KeyPair keyPair = SecureUtil.generateKeyPair("RSA", 2048);
        result.put("pub_key", Base64.encode(keyPair.getPublic().getEncoded()));
        result.put("pri_key", Base64.encode(keyPair.getPrivate().getEncoded()));
        return result;
    }

    /**
     * aes加密
     *
     * @param str 需要加密的字符串
     * @return {@link String }
     * @author JACK
     * @date 2023/05/05
     */
    public static String encAes(String str) {
        return aes.encryptBase64(str);
    }

    /**
     * rsa加密
     *
     * @param str 需要加密的字符串
     * @return {@link String }
     * @author JACK
     * @date 2023/05/05
     */
    public static String encRsa(String str) {
        return rsa.encryptBase64(str, KeyType.PublicKey);
    }

    /**
     * aes解密
     *
     * @param str 需要解密的字符串
     * @return {@link String }
     * @author JACK
     * @date 2023/05/05
     */
    public static String decAes(String str) {
        String decrypted = StrUtil.EMPTY;
        try {
            decrypted = aes.decryptStr(str);
        } catch (Exception e) {
            log.error("解密失败", e);
        }
        return decrypted;
    }

    /**
     * rsa解密
     *
     * @param str 需要解密的字符串
     * @return {@link String }
     * @author JACK
     * @date 2023/05/05
     */
    public static String decRsa(String str) {
        return rsa.decryptStr(str, KeyType.PrivateKey);
    }

}