package com.hxqc.basic.dependency.util; import org.apache.commons.lang.StringUtils;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder; import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.SecureRandom;
/**
* 编码工具类
* 1.将byte[]转为各种进制的字符串
* 2.base 64 encode
* 3.base 64 decode
* 4.获取byte[]的md5值
* 5.获取字符串md5值
* 6.结合base64实现md5加密
* 7.AES加密
* 8.AES加密为base 64 code
* 9.AES解密
* 10.将base 64 code AES解密
* @author uikoo9
* @version 0.0.7.20140601
*/
public class AESUtil { public static void main(String[] args) throws Exception {
String content = "noauthoritynoauthority";
System.out.println("加密前：" + content); String key = "nc_report@#$";
System.out.println("加密密钥和解密密钥：" + key); String encrypt = aesEncrypt(content, key);
System.out.println("加密后：" + encrypt); String decrypt = aesDecrypt(encrypt, key);
System.out.println("解密后：" + decrypt);
} /**
* 将byte[]转为各种进制的字符串
* @param bytes byte[]
* @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制
* @return 转换后的字符串
*/
public static String binary(byte[] bytes, int radix){
return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数
} /**
* base 64 encode
* @param bytes 待编码的byte[]
* @return 编码后的base 64 code
*/
public static String base64Encode(byte[] bytes){
return new BASE64Encoder().encode(bytes);
} /**
* base 64 decode
* @param base64Code 待解码的base 64 code
* @return 解码后的byte[]
* @throws Exception
*/
public static byte[] base64Decode(String base64Code) throws Exception{
return StringUtils.isBlank(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
} /**
* 获取byte[]的md5值
* @param bytes byte[]
* @return md5
* @throws Exception
*/
public static byte[] md5(byte[] bytes) throws Exception {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(bytes); return md.digest();
} /**
* 获取字符串md5值
* @param msg
* @return md5
* @throws Exception
*/
public static byte[] md5(String msg) throws Exception {
return StringUtils.isBlank(msg) ? null : md5(msg.getBytes());
} /**
* 结合base64实现md5加密
* @param msg 待加密字符串
* @return 获取md5后转为base64
* @throws Exception
*/
public static String md5Encrypt(String msg) throws Exception{
return StringUtils.isBlank(msg) ? null : base64Encode(md5(msg));
} /**
* AES加密
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的byte[]
* @throws Exception
*/
public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES"); /* linux 要加这三行代码*/
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(encryptKey.getBytes());
kgen.init(128, secureRandom); //kgen.init(128, new SecureRandom(decryptKey.getBytes())); Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES")); return cipher.doFinal(content.getBytes("utf-8"));
} /**
* AES加密为base 64 code
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, encryptKey));
} /**
* AES解密
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密钥
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES"); /* linux 要加这三行代码*/
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(decryptKey.getBytes());
kgen.init(128, secureRandom); //kgen.init(128, new SecureRandom(decryptKey.getBytes())); Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
byte[] decryptBytes = cipher.doFinal(encryptBytes); return new String(decryptBytes);
} /**
* 将base 64 code AES解密
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密钥
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isBlank(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
} }