3DES加解密工具类

package com.jiyang.common.utils;

import com.jiyang.common.exception.ServiceException;
import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.nio.charset.StandardCharsets;
import java.security.Key;

/**
 * 3DES加解密工具类
 *
 */
public class Des3Utils {

    /**
     * 加密算法
     */
    private static final String KEY_ALGORITHM = "DESede";
    private static final String CIPHER_ALGORITHM = "DESede/CBC/PKCS5Padding";

    private static final String KEY = "PWNIOONCPPERMGEKYQQEOUEK";
    private static final String IV = "12345678";

    /**
     * 3DES 加密
     *
     * @param key  秘钥（24位）
     * @param iv   偏移量
     * @param data 需要加密的字符串
     * @return 返回加密的字符串
     */
    public static String encrypt(String key, String iv, String data) {
        try {
            DESedeKeySpec spec = new DESedeKeySpec(key.getBytes(StandardCharsets.UTF_8));
            SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
            Key dusky = secretKeyFactory.generateSecret(spec);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            IvParameterSpec ips = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8));
            cipher.init(Cipher.ENCRYPT_MODE, dusky, ips);
            byte[] bOut = cipher.doFinal(data.getBytes(StandardCharsets.UTF_8));
            return Base64.encodeBase64String(bOut);
        } catch (Exception e) {
            throw new RuntimeException("3DES 解密错误, " + e.getMessage());
        }
    }

    /**
     * 3DES 解密
     *
     * @param key  秘钥（24位）
     * @param iv   偏移量
     * @param data 需要解密的密文
     * @return 返回加密的字符串
     */
    public static String decrypt(String key, String iv, String data) {
        try {
            DESedeKeySpec spec = new DESedeKeySpec(key.getBytes(StandardCharsets.UTF_8));
            SecretKeyFactory factory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
            Key desk = factory.generateSecret(spec);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            IvParameterSpec ips = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8));
            cipher.init(Cipher.DECRYPT_MODE, desk, ips);
            byte[] bOut = cipher.doFinal(Base64.decodeBase64(data.getBytes(StandardCharsets.UTF_8)));
            return new String(bOut, StandardCharsets.UTF_8);
        } catch (Exception e) {
            throw new ServiceException("3DES 解密错误, " + e.getMessage());
        }
    }

    /**
     * 数据加密
     *
     * @param data 明文
     * @return 加密字符串
     */
    public static String encrypt(String data) {
        return encrypt(KEY, IV, data);
    }

    /**
     * 数据解密
     *
     * @param data 加密字符串
     * @return 明文
     */
    public static String decrypt(String data) {
        return decrypt(KEY, IV, data);
    }

    public static void main(String[] args) {
        String data = "123";
        System.out.println("需要加密的字符串内容为：" + data);
        String des3EncodeCBC = encrypt(data);
        System.out.println("加密后的字符串内容为：" + des3EncodeCBC);
        System.out.println("密文长度:" + des3EncodeCBC.length());
        String des3DecodeCBC = decrypt(des3EncodeCBC + 123123);
        System.out.println("解密后的字符串内容为：" + des3DecodeCBC);
    }

}