Java实现的AES256加密解密功能示例

Java实现的实现的AES256加密解密功能示例加密解密功能示例

主要介绍了Java实现的AES256加密解密功能,结合完整实例形式分析了Java实现AES256加密解密功能的步骤与

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本文实例讲述了Java实现的AES256加密解密功能。分享给大家供大家参考，具体如下：

一.代码

package com.handler;

import java.io.UnsupportedEncodingException;

import java.security.Key;

public static final String KEY_ALGORITHM="AES";

public static final String CIPHER_ALGORITHM="AES/ECB/PKCS7Padding";

public static byte[] initkey() throws Exception{

//实例化密钥生成器

Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

KeyGenerator kg=KeyGenerator.getInstance(KEY_ALGORITHM, "BC");

kg.init(256);

kg.init(128);

SecretKey secretKey=kg.generateKey();

return secretKey.getEncoded();

}

public static Key toKey(byte[] key) throws Exception{

SecretKey secretKey=new SecretKeySpec(key,KEY_ALGORITHM);

return secretKey;

}

public static byte[] encrypt(byte[] data,byte[] key) throws Exception{

Key k=toKey(key);

Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

Cipher cipher=Cipher.getInstance(CIPHER_ALGORITHM, "BC");

cipher.init(Cipher.ENCRYPT_MODE, k);

cipher.init(Cipher.DECRYPT_MODE, k);

return cipher.doFinal(data);

}

public static void main(String[] args) throws UnsupportedEncodingException{

String str="芸sweet";

//打印原文

System.out.println("原文："+str);

//密钥

byte[] key;

try {

}

System.out.print("n");

//加密

byte[] data=AES256Encryption.encrypt(str.getBytes(), key);

//打印密文

System.out.print("加密后：");

for(int i = 0;i

System.out.printf("%x", data[i]);

}

System.out.print("n");