import java.security.Key;
import java.security.Security;
import java.util.Date;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import com.hurong.core.util.DateUtil;
public class DesUtils {
private static String strDefaultKey = "";//字符串默认键值
private Cipher encryptCipher = null;//加密工具
private Cipher decryptCipher = null;//解密工具
/**
* 将byte数组转换为表示16进制值的字符串, 如:byte[]{8,18}转换为:0813, 和public static byte[]
* hexStr2ByteArr(String strIn) 互为可逆的转换过程
* @param arrB 需要转换的byte数组
* @return 转换后的字符串
*
*/
public static String byteArr2HexStr(byte[] arrB){
int iLen = arrB.length;
StringBuffer sb = new StringBuffer(iLen * 2);// 每个byte用两个字符才能表示,所以字符串的长度是数组长度的两倍
for (int i = 0; i < iLen; i++) {
int intTmp = arrB[i];
while (intTmp < 0) {// 把负数转换为正数
intTmp = intTmp + 256;
}
if (intTmp < 16) {// 小于0F的数需要在前面补0
sb.append("0");
}
sb.append(Integer.toString(intTmp, 16));
}
return sb.toString();
}
/**
* 将表示16进制值的字符串转换为byte数组, 和public static String byteArr2HexStr(byte[] arrB)
* 互为可逆的转换过程
*
* @param strIn 需要转换的字符串
* @return 转换后的byte数组
*/
public static byte[] hexStr2ByteArr(String strIn){
byte[] arrB = strIn.getBytes();
int iLen = arrB.length;
byte[] arrOut = new byte[iLen / 2];// 两个字符表示一个字节,所以字节数组长度是字符串长度除以2
for (int i = 0; i < iLen; i = i + 2) {
String strTmp = new String(arrB, i, 2);
arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
}
return arrOut;
}
/**
* 默认构造方法,使用默认密钥
*
* @throws Exception
*/
public DesUtils() throws Exception {
this(strDefaultKey);
}
/**
* DES字符串加密
* 指定密钥构造方法
* @param strKey 指定的密钥
* @throws Exception
*/
public DesUtils(String strKey){
Security.addProvider(new com.sun.crypto.provider.SunJCE());
try {
Key key = getKey(strKey.getBytes());
encryptCipher = Cipher.getInstance("DES");
encryptCipher.init(Cipher.ENCRYPT_MODE, key);
decryptCipher = Cipher.getInstance("DES");
decryptCipher.init(Cipher.DECRYPT_MODE, key);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 加密字节数组
*
* @param arrB 需加密的字节数组
* @return 加密后的字节数组
* @throws Exception
*/
public byte[] encrypt(byte[] arrB){
byte[] encrypt=null;
try {
encrypt=encryptCipher.doFinal(arrB);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return encrypt;
}
/**
* 加密字符串
*
* @param strIn 需加密的字符串
* @return 加密后的字符串
* @throws Exception
*/
public String encrypt(String strIn){
return byteArr2HexStr(encrypt(strIn.getBytes()));
}
/**
* 解密字节数组
*
* @param arrB 需解密的字节数组
* @return 解密后的字节数组
* @throws Exception
*/
public byte[] decrypt(byte[] arrB) throws BadPaddingException{
byte[] decrypt=null;
try {
decrypt= decryptCipher.doFinal(arrB);
} catch (Exception e) {
//e.printStackTrace();
return null;
}
return decrypt;
}
/**
* 解密字符串
*
* @param strIn 需解密的字符串
* @return 解密后的字符串
* @throws Exception
*/
public String decrypt(String strIn) throws BadPaddingException{
if(null==decrypt(hexStr2ByteArr(strIn))){
return "";
}
return new String(decrypt(hexStr2ByteArr(strIn)));
}
/**
* 从指定字符串生成密钥,密钥所需的字节数组长度为8位 不足8位时后面补0,超出8位只取前8位
*
* @param arrBTmp 构成该字符串的字节数组
* @return 生成的密钥
* @throws java.lang.Exception
*/
private Key getKey(byte[] arrBTmp) throws Exception {
byte[] arrB = new byte[8];// 创建一个空的8位字节数组(默认值为0)
for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {// 将原始字节数组转换为8位
arrB[i] = arrBTmp[i];
}
Key key = new javax.crypto.spec.SecretKeySpec(arrB, "DES");// 生成密钥
return key;
}
public static boolean getAuthorization(String password,String key){
try{
boolean flag=false;
DesUtils des = new DesUtils(password);//自定义密钥
String code=des.decrypt(key);
String mac=GetMACUtil.getMacStr();//机器码
if(mac.equals(code)){
flag=true;
}
return flag;
}
catch (Exception e) {
e.printStackTrace();
return false;
}
}
public String getEncod(String mahCode,String password,String endDate,DesUtils des)
{
try
{
String str="";
String dstr=mahCode+","+endDate;
str=des.encrypt(dstr);
return str;
}
catch (Exception e) {
e.printStackTrace();
return "";
}
}
public static void main(String[] args) {
DesUtils du=new DesUtils("creditsoftware");
String code=du.getEncod("70-1A-04-71-09-0E", "creditsoftware", "2012-12-31", du);
System.out.println(code);
}
}