java AES对称加密工具 适用于windows与linux

之前在网上搜索的AESUtil都使用了SecureRandom获取随机数，部署到linux上就会出现解密错误的问题

这里提供一个windows和linux都能使用的AESUtil

简书格式不好看。CSDN地址 https://blog.csdn.net/YZX2018/article/details/86552683

引入Base64的依赖包

<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.11</version>
</dependency>

复制下面的代码就能使用了

import org.apache.commons.codec.binary.Base64;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

/**

• @version V1.0

• @desc AES 加密工具类
  */
  public class AESUtil {

  private static final String KEY_ALGORITHM = "AES";
  private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";// 默认的加密算法

  /**

  • AES 加密操作

  • @param content 待加密内容

  • @param key 密钥

  • @return 返回Base64转码后的加密数据

  • @throws NoSuchPaddingException

  • @throws NoSuchAlgorithmException

  • @throws UnsupportedEncodingException

  • @throws InvalidKeyException

  • @throws BadPaddingException

  • @throws IllegalBlockSizeException
    */
    public static String encrypt(String content, String key, String charset) throws NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {

     Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
    
     byte[] byteContent = content.getBytes(charset);
    
     cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(key));// 初始化为加密模式的密码器
    
     byte[] result = cipher.doFinal(byteContent);// 加密
    
     return Base64.encodeBase64String(result);// 通过Base64转码返回
    

  }

  /**

  • AES 解密操作
  • @param content 待解密内容
  • @param key 密钥
  • @param charset
  • @return
  • @throws NoSuchPaddingException
  • @throws NoSuchAlgorithmException
  • @throws InvalidKeyException
  • @throws BadPaddingException
  • @throws IllegalBlockSizeException
  • @throws UnsupportedEncodingException
    */
    public static String decrypt(String content, String key, String charset) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    // 实例化
    Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
    // 使用密钥初始化，设置为解密模式
    cipher.init(Cipher.DECRYPT_MODE, getSecretKey(key));
    // 执行操作
    byte[] result = cipher.doFinal(Base64.decodeBase64(content));
    return new String(result, charset);

  }

  /**

  • 生成加密秘钥

  • @return

  • @throws NoSuchAlgorithmException
    */
    private static SecretKeySpec getSecretKey(final String key) throws NoSuchAlgorithmException{
    // 返回生成指定算法密钥生成器的 KeyGenerator 对象
    KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);

     // AES 要求密钥长度为 128
     SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
     secureRandom.setSeed(key.getBytes());
    
     kg.init(128, secureRandom);
    
     // 生成一个密钥
     SecretKey secretKey = kg.generateKey();
    
     return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥
    

  }
  }