/**
* 版本修订记录
* 创建：2013-6-20
* 版本：
*
* 修订1： 说明：
* 修订2： 说明：
*
* 代码参考：
* http://jbgtwang.iteye.com/blog/1499940
*/
package org.howsun.util.zip;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
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.howsun.log.Log;
import org.howsun.log.LogFactory;
/**
* 描述：加密与解密工具
* @author howsun
* @version 3.0
* Building Time 2013-6-20
*
*/
public class Encrypts {
private final static String ENCRYPTKEY="0123456789";
public static final Log log = LogFactory.getLog(Encrypts.class);
/**
*
* @Title: getEncryptKey
* @Description: 检验加密key
* @param encryptKey
* @return
* String
*
*/
private static String getEncryptKey(String encryptKey){
if(null == encryptKey || "".equals(encryptKey)){
return ENCRYPTKEY;
}
return encryptKey;
}
/**
*
* @Title: encrypt
* @Description: 加密:普通java字串加密成16进制字串(String -> Byte -> HexStr)
* @param content 要加密处理的字串
* @param encryptKey 加密密钥
* @return
* String
*
*/
public static String encrypt(String content, String encryptKey){
byte[] encryptResult = encryptStrToByte(content, getEncryptKey(encryptKey));
return parseByte2HexStr(encryptResult);
}
/**
*
* @Title: decrypt
* @Description: 加密:16进制字串解密成普通java字串(HexStr -> Byte ->String)
* @param content 要解密处理的16进制字串
* @param encryptKey 解密密钥
* @return
* String
*
*/
public static String decrypt(String content, String encryptKey){
byte[] decryptFrom = parseHexStr2Byte(content);
byte[] decryptResult = decrypt(decryptFrom,getEncryptKey(encryptKey));
return new String(decryptResult);
}
/**
* 加密:字串 --> 二进制
* @param content 需要加密的内容
* @param password 加密密码
* @return
*/
private static byte[] encryptStrToByte(String content, String password) {
try {
return encrypt(content.getBytes("utf-8"), password);
}
catch (UnsupportedEncodingException e) {
log.info("UnsupportedEncodingException:", e);
}
return null;
/*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) {
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 byte[] encrypt(byte[] contents, String password) {
try {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
/*
* SecureRandom实现完全隨操作系统本身的內部狀態，除非調用方在調用getInstance方法之後又調用了setSeed方法；
* 该实现在 windows上每次生成的key都相同，但是在 solaris或部分linux系统上则不同。
* kgen.init(128, new SecureRandom(password.getBytes()));
* SecretKey secretKey = kgen.generateKey();
*/
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes());
keyGenerator.init(128, secureRandom);
SecretKey secretKey = keyGenerator.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");//创建密码器
cipher.init(Cipher.ENCRYPT_MODE, key);//初始化
byte[] result = cipher.doFinal(contents);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
log.info("NoSuchAlgorithmException:", e);
} catch (NoSuchPaddingException e) {
log.info("NoSuchPaddingException:", e);
} catch (InvalidKeyException e) {
log.info("InvalidKeyException:", e);
} catch (IllegalBlockSizeException e) {
log.info("IllegalBlockSizeException:", e);
} catch (BadPaddingException e) {
log.info("BadPaddingException:", e);
}
return null;
}
/**解密
* @param content 待解密内容
* @param password 解密密钥
* @return
*/
public static byte[] decrypt(byte[] content, String password) {
try {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
/*
* SecureRandom实现完全隨操作系统本身的內部狀態，除非調用方在調用getInstance方法之後又調用了setSeed方法；
* 该实现在 windows上每次生成的key都相同，但是在 solaris或部分linux系统上则不同。
* kgen.init(128, new SecureRandom(password.getBytes()));
* SecretKey secretKey = kgen.generateKey();
*/
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(password.getBytes());
keyGenerator.init(128, secureRandom);
SecretKey secretKey = keyGenerator.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) {
log.info("NoSuchAlgorithmException 错误:", e);
} catch (NoSuchPaddingException e) {
log.info("NoSuchPaddingException 错误:", e);
} catch (InvalidKeyException e) {
log.info("InvalidKeyException 错误:", e);
} catch (IllegalBlockSizeException e) {
log.info("IllegalBlockSizeException 错误:", e);
} catch (BadPaddingException e) {
throw new RuntimeException("密码错误");
//log.info("BadPaddingException 错误:", e);
}
return null;
}
/**将二进制转换成16进制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制转换为二进制
*
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),
16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
}