AES 算法加密和解密

package com.util.aes;

 

import java.io.UnsupportedEncodingException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import java.security.SecureRandom;

import java.text.SimpleDateFormat;

import java.util.Date;

 

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.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.util.Base64Utils;

/**

 * 使用AES对字符串进行加密

 * @author dell

 *

 */

public class Aes {

static Logger logAes = LoggerFactory.getLogger(Aes.class);

/**

* 加密

*

* @paramcontent需要加密的内容

* @parampassword加密密码

* @return

*/

public static byte[] encrypt(String content, String password) {

try {

KeyGenerator kgen = KeyGenerator.getInstance("AES");

kgen.init(128, new SecureRandom(password.getBytes()));

 

SecretKey secretKey = kgen.generateKey();

byte[] enCodeFormat = secretKey.getEncoded();

 

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

Cipher cipher = Cipher.getInstance("AES");// 创建密码器

byte[] byteContent = content.getBytes("utf-8");

 

cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化

byte[] result = cipher.doFinal(byteContent);

return result;// 加密

 

} catch (NoSuchAlgorithmException e) {

logAes.error("NoSuchAlgorithmException="+e.getMessage());

} catch (NoSuchPaddingException e) {

logAes.error("NoSuchPaddingException="+e.getMessage());

 

} catch (InvalidKeyException e) {

logAes.error("InvalidKeyException", e);

} catch (UnsupportedEncodingException e) {

logAes.error("加密异常", e);

} catch (IllegalBlockSizeException e) {

logAes.error("加密异常", e);

} catch (BadPaddingException e) {

logAes.error("加密异常", e);

}

return null;

}

 

/**

* 解密

* 

* @paramcontent待解密内容

* @parampassword解密密钥

* @return

*/

public static byte[] decrypt(byte[] content, String password) {

try {

KeyGenerator kgen = KeyGenerator.getInstance("AES");

kgen.init(128, new SecureRandom(password.getBytes()));

 

SecretKey secretKey = kgen.generateKey();

byte[] enCodeFormat = secretKey.getEncoded();

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

Cipher cipher = Cipher.getInstance("AES");// 创建密码器

cipher.init(Cipher.DECRYPT_MODE, key);// 初始化

byte[] result = cipher.doFinal(content);

return result;// 加密

 

} catch (NoSuchAlgorithmException e) {

logAes.error("解密异常", e);

 

} catch (NoSuchPaddingException e) {

logAes.error("解密异常", e);

 

} catch (InvalidKeyException e) {

logAes.error("解密异常", e);

 

} catch (IllegalBlockSizeException e) {

logAes.error("解密异常", e);

 

} catch (BadPaddingException e) {

logAes.error("解密异常", e);

}

 

return null;

}

 

 

 

/**

* 加密

*

* @paramcontent需要加密的内容

* @parampassword加密密码

* @return

*/

public static byte[] encrypt2(String content, String password) {

try {

SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");

Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");

byte[] byteContent = content.getBytes("utf-8");//编码格式

 

cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化

byte[] result = cipher.doFinal(byteContent);

return result;// 加密

 

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

} catch (NoSuchPaddingException e) {

e.printStackTrace();

} catch (InvalidKeyException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

} catch (BadPaddingException e) {

e.printStackTrace();

}

return null;

}

 

 

public static void main(String[] args) {

//待加密内容

String content = "bocetest123";

//秘钥

String password = "12345678";

// 加密

System.out.println("加密前：" + content);

byte[] encryptResult = encrypt(content, password);

String tt4 = Base64Utils.encodeToString(encryptResult);

System.out.println(new String(tt4));

 

// 解密

byte[] decryptResult = decrypt(encryptResult, password);

System.out.println("解密后：" + new String(decryptResult));

 

}

}