Java实现3DES加密解密（DESede/ECB/PKCS5Padding使用）

Java实现3DES加密解密（DESede/ECB/PKCS5Padding使用）

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

/**
 * 3DES加密工具类
 * @author qzz
 */
public class ThreeDESUtils {

    /**
     * 加解密统一编码方式
     */
    private final static String ENCODING = "utf-8";

    /**
     * 加解密方式
     */
    private final static String ALGORITHM  = "DESede";

    /**
     *加密模式及填充方式
     */
    private final static String PATTERN = "DESede/ECB/pkcs5padding";

    /**
     * 3DES加密
     *
     * @param plainText 普通文本
     * @param sK 秘钥（24位密码）
     * @return
     * @throws Exception
     */
    public static String encode(String plainText,String sK) throws Exception {
        SecretKey secretKey = new SecretKeySpec(sK.getBytes(ENCODING), ALGORITHM);
        // 3DES加密采用pkcs5padding填充
        Cipher cipher = Cipher.getInstance(PATTERN);
        // 用密匙初始化Cipher对象
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        // 执行加密操作
        byte[] encryptData = cipher.doFinal(plainText.getBytes(ENCODING));
        return Base64.getEncoder().encodeToString(encryptData);
    }

    /**
     * 3DES解密
     *
     * @param encryptText 加密文本
     * @return
     * @throws Exception
     */
    public static String decode(String encryptText, String sK) throws Exception {
        SecretKey secretKey = new SecretKeySpec(sK.getBytes(ENCODING), ALGORITHM);
        // 3DES加密采用pkcs5padding填充
        Cipher cipher = Cipher.getInstance(PATTERN);

        // 用密匙初始化Cipher对象
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        // 正式执行解密操作
        byte[] decryptData = cipher.doFinal(Base64.getDecoder().decode(encryptText));
        return new String(decryptData, ENCODING);
    }

    public static void main(String[] args) throws Exception {
        //加密
        System.out.println(encode("test-111","111036369260679051122113"));
        
        //解密
        System.out.println(decode("BGL351OzferfAc2gm9lMcf2R2ZR6A1KvefEXoTQmybE=","111036369260679051122113"));
    }
}

注意：sK 秘钥:为24位随机数。只有确保加解码sk一致即可。
https://www.iteye.com/blog/jamie-wang-1604596

import java.security.NoSuchAlgorithmException;  
import java.security.Security;  
import java.util.Random;  
  
import javax.crypto.Cipher;  
import javax.crypto.KeyGenerator;  
import javax.crypto.SecretKey;  
import javax.crypto.SecretKeyFactory;  
import javax.crypto.spec.DESedeKeySpec;  
import javax.crypto.spec.IvParameterSpec;  
  
@SuppressWarnings("restriction")  
public class TripleDES {  
    static {  
        Security.addProvider(new com.sun.crypto.provider.SunJCE());  
    }  
  
    private static final String MCRYPT_TRIPLEDES = "DESede";  
    private static final String TRANSFORMATION = "DESede/CBC/PKCS5Padding";  
  
    public static byte[] decrypt(byte[] data, byte[] key, byte[] iv) throws Exception {  
        DESedeKeySpec spec = new DESedeKeySpec(key);  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(MCRYPT_TRIPLEDES);  
        SecretKey sec = keyFactory.generateSecret(spec);  
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);  
        IvParameterSpec IvParameters = new IvParameterSpec(iv);  
        cipher.init(Cipher.DECRYPT_MODE, sec, IvParameters);  
        return cipher.doFinal(data);  
    }  
  
    public static byte[] encrypt(byte[] data, byte[] key, byte[] iv) throws Exception {  
        DESedeKeySpec spec = new DESedeKeySpec(key);  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");  
        SecretKey sec = keyFactory.generateSecret(spec);  
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);  
        IvParameterSpec IvParameters = new IvParameterSpec(iv);  
        cipher.init(Cipher.ENCRYPT_MODE, sec, IvParameters);  
        return cipher.doFinal(data);  
    }  
  
    public static byte[] generateSecretKey() throws NoSuchAlgorithmException {  
        KeyGenerator keygen = KeyGenerator.getInstance(MCRYPT_TRIPLEDES);  
        return keygen.generateKey().getEncoded();  
    }  
  
    public static byte[] randomIVBytes() {  
        Random ran = new Random();  
        byte[] bytes = new byte[8];  
        for (int i = 0; i < bytes.length; ++i) {  
            bytes[i] = (byte) ran.nextInt(Byte.MAX_VALUE + 1);  
        }  
        return bytes;  
    }  
  
    public static void main(String args[]) throws Exception {  
        String plainText = "a12*&1c中文";  
        final byte[] secretBytes = TripleDES.generateSecretKey();  
  
        final byte[] ivbytes = TripleDES.randomIVBytes();  
        System.out.println("plain text: " + plainText);  
        byte[] encrypt = TripleDES.encrypt(plainText.getBytes(), secretBytes, ivbytes);  
        System.out.println("cipher text: " + encrypt);  
        System.out.println("decrypt text: " + new String(TripleDES.decrypt(encrypt, secretBytes, ivbytes), "UTF-8"));  
    }  
  
}