AES加密算法代码,Java代码库,德仔网

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【Java】 AES加密算法
作者:狙击手 / 发布于2015/1/12/ 477

	package com.sniper.survey.util.coder;
	
	import java.security.InvalidKeyException;
	import java.security.Key;
	import java.security.NoSuchAlgorithmException;
	import java.security.Security;
	
	import javax.crypto.BadPaddingException;
	import javax.crypto.Cipher;
	import javax.crypto.IllegalBlockSizeException;
	import javax.crypto.KeyGenerator;
	import javax.crypto.NoSuchPaddingException;
	import javax.crypto.SecretKey;
	import javax.crypto.spec.SecretKeySpec;
	
	import org.apache.commons.codec.binary.Base64;
	import org.apache.commons.codec.digest.DigestUtils;
	import org.bouncycastle.jce.provider.BouncyCastleProvider;
	/**
	*
	* @author sniper
	*
	*/
	public class AESCoder {
	
	 /**
	 * 迷药算法
	 */
	 private static final String KEY_ALGORITHM = "AES";
	 /**
	 * 加密/揭秘算法 / 工作模式 / 填充方式 java7 支持 PCKCS5OADDING
	 */
	 private static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";
	
	 static {
	 Security.addProvider(new BouncyCastleProvider());
	 }
	
	 /**
	 * 转换密钥
	 *
	 * @param key
	 * 二进制迷药
	 * @return
	 */
	 private static Key toKey(byte[] key) {
	 // 实例化aes 迷药材料
	 SecretKey secretKey = new SecretKeySpec(key, KEY_ALGORITHM);
	 return secretKey;
	 }
	
	 /**
	 * 解密
	 *
	 * @param data
	 * @param key
	 * @return
	 * @throws NoSuchAlgorithmException
	 * @throws NoSuchPaddingException
	 * @throws InvalidKeyException
	 * @throws IllegalBlockSizeException
	 * @throws BadPaddingException
	 */
	 public static byte[] decrypt(byte[] data, byte[] key)
	 throws NoSuchAlgorithmException, NoSuchPaddingException,
	 InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
	 // 还原密钥
	 Key k = toKey(key);
	 /**
	 * 实例化 使用pkcs7padding 填充方式 安如下方式实现 cipher.getInstance(CIPHER_ALGORITHM,
	 * "BC");
	 */
	
	 Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
	 // 初始化,解密模式
	 cipher.init(Cipher.DECRYPT_MODE, k);
	 // 执行操作
	 return cipher.doFinal(data);
	 }
	
	 /**
	 * 加密
	 *
	 * @param data
	 * 代加密的数据
	 * @param key
	 * 密钥
	 * @return
	 * @throws NoSuchAlgorithmException
	 * @throws NoSuchPaddingException
	 * @throws IllegalBlockSizeException
	 * @throws BadPaddingException
	 * @throws InvalidKeyException
	 */
	 public static byte[] encrypt(byte[] data, byte[] key)
	 throws NoSuchAlgorithmException, NoSuchPaddingException,
	 IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
	 Key k = toKey(key);
	 // Security.addProvider(new BouncyCastleProvider());
	 Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
	 cipher.init(Cipher.ENCRYPT_MODE, k);
	 return cipher.doFinal(data);
	 }
	
	 /**
	 * 生成密钥
	 *
	 * @return
	 * @throws NoSuchAlgorithmException
	 */
	 public static byte[] initKey() throws NoSuchAlgorithmException {
	 // 实例化
	 KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
	 // aes要求密钥 长度 128位,192位,或者256
	 kg.init(256);
	 // 生成密钥
	 SecretKey secretKey = kg.generateKey();
	 // 获取密钥的二进制编码形式
	 return secretKey.getEncoded();
	 }
	
	 /**
	 * 初始化密钥,得到密钥的字符串形式
	 *
	 * @return
	 * @throws NoSuchAlgorithmException
	 */
	 public static String initKeyString() throws NoSuchAlgorithmException {
	 return Base64.encodeBase64String(initKey());
	 }
	
	 /**
	 * 返回密钥
	 *
	 * @param key
	 * @return
	 */
	 public static byte[] getKey(String key) {
	 return Base64.decodeBase64(key);
	 }
	
	 /**
	 * 摘要处理
	 *
	 * @param data
	 * @return
	 */
	 public static String shaHex(byte[] data) {
	 return DigestUtils.md5Hex(data);
	 }
	
	 /**
	 * 验证
	 *
	 * @param data
	 * @param messageDigest
	 * @return
	 */
	 public static boolean validate(byte[] data, String messageDigest) {
	 return messageDigest.equals(shaHex(data));
	 }
	
	 public static void main(String[] args) throws NoSuchAlgorithmException,
	 InvalidKeyException, NoSuchPaddingException,
	 IllegalBlockSizeException, BadPaddingException {
	 String inputStr = "AES";
	 byte[] inputData = inputStr.getBytes();
	
	 System.out.println("原文:\t" + inputStr);
	 byte[] key = AESCoder.initKey();
	 System.out.println("密钥:\t" + Base64.encodeBase64String(key));
	 // 加密
	 inputData = AESCoder.encrypt(inputData, key);
	 System.out.println("加密后:\t" + Base64.encodeBase64String(inputData));
	 // 解密
	 byte[] outputData = AESCoder.decrypt(inputData, key);
	 System.out.println("解密后:\t" + new String(outputData));
	 }
	}
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　加密算法　　 AES　
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