zoukankan      html  css  js  c++  java
  • 【java工具类】AES加密解密

    百度百科一下,AES:
    高级加密标准(英语:Advanced Encryption Standard,缩写:AES),在密码学中又称Rijndael加密法,是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES,已经被多方分析且广为全世界所使用。经过五年的甄选流程,高级加密标准由美国国家标准与技术研究院(NIST)于2001年11月26日发布于FIPS PUB 197,并在2002年5月26日成为有效的标准。2006年,高级加密标准已然成为对称密钥加密中最流行的算法之一。

    AESCipher.java代码:

    import java.security.InvalidAlgorithmParameterException;
    import java.security.InvalidKeyException;
    import java.security.NoSuchAlgorithmException;
    import javax.crypto.BadPaddingException;
    import javax.crypto.Cipher;
    import javax.crypto.IllegalBlockSizeException;
    import javax.crypto.NoSuchPaddingException;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;

    import java.io.UnsupportedEncodingException;
    import org.apache.commons.codec.binary.Base64;

    public class AESCipher {

    private static final String IV_STRING = "A-16-Byte-String";
    private static final String charset = "UTF-8";

    /**
    * 加密
    * @param content
    * @param key
    * @return
    * @throws InvalidKeyException
    * @throws NoSuchAlgorithmException
    * @throws NoSuchPaddingException
    * @throws InvalidAlgorithmParameterException
    * @throws IllegalBlockSizeException
    * @throws BadPaddingException
    * @throws UnsupportedEncodingException
    */
    public static String aesEncryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    byte[] contentBytes = content.getBytes(charset);
    byte[] keyBytes = key.getBytes(charset);
    byte[] encryptedBytes = aesEncryptBytes(contentBytes, keyBytes);
    //Encoder encoder = Base64.getEncoder();
    return Base64.encodeBase64(encryptedBytes).toString();
    }

    /**
    * 解密
    * @param content
    * @param key
    * @return
    * @throws InvalidKeyException
    * @throws NoSuchAlgorithmException
    * @throws NoSuchPaddingException
    * @throws InvalidAlgorithmParameterException
    * @throws IllegalBlockSizeException
    * @throws BadPaddingException
    * @throws UnsupportedEncodingException
    */
    public static String aesDecryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    byte[] encryptedBytes = Base64.decodeBase64(content.getBytes());
    byte[] keyBytes = key.getBytes(charset);
    byte[] decryptedBytes = aesDecryptBytes(encryptedBytes, keyBytes);
    return new String(decryptedBytes, charset);
    }

    public static byte[] aesEncryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    return cipherOperation(contentBytes, keyBytes, Cipher.ENCRYPT_MODE);
    }

    public static byte[] aesDecryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    return cipherOperation(contentBytes, keyBytes, Cipher.DECRYPT_MODE);
    }

    private static byte[] cipherOperation(byte[] contentBytes, byte[] keyBytes, int mode) throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
    SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");

    byte[] initParam = IV_STRING.getBytes(charset);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(initParam);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(mode, secretKey, ivParameterSpec);

    return cipher.doFinal(contentBytes);
    }

    }

    调用,比如解密方法:
    String deCodeStr = AESCipher.aesDecryptString(enCodeStr, secretKey);   //secretKey是加密时候的秘钥,相同才能解密
  • 相关阅读:
    XX需求分析系统每日进度(二)
    XX需求分析系统每日进度(一)
    周总结(二)
    Hyperleder Fabric chaincode生命周期
    【转】六种学术不端的引用行为
    引导学生,让学生不走神。
    MySQL 的常用引擎
    LeetCode283移动零问题java高效解法
    使用android studio进行springboot项目的开发
    android逆向反编译工具包下载
  • 原文地址:https://www.cnblogs.com/tuituji27/p/11304014.html
Copyright © 2011-2022 走看看