import java.util.ArrayList;

import java.util.List;

import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

public class SecretUtils {

//根秘钥

final static byte[] keyBytes = Util.hexStringToByteArray("404142434445464748494A4B4C4D4E4F48494A4B4C4D4E4F");

private static final String Algorithm = "DESede"; //3DES算法

private static byte[] ivs = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 };

private static IvParameterSpec iv = new IvParameterSpec(ivs);

/************************************************************

Function: // encryptMode(byte[] src,byte[] key)

Description: // 3DES_ECB_EN

Input: // src-源数据(byte[]) key-加密秘钥(byte[])

Output: // 加密后的数据

Return: // byte[]

*************************************************************/

public static byte[] encryptMode(byte[] src,byte[] key) {

try {

System.out.println("没到8bytes:"+Util.byteArrayToHexString(src));

SecretKey deskey = new SecretKeySpec(key, Algorithm); //生成密钥21

Cipher c1 = Cipher.getInstance("DESede/ECB/NoPadding"); //实例化负责加密/解密的Cipher工具类22

c1.init(Cipher.ENCRYPT_MODE, deskey); //初始化为加密模式23

return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) {

e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) {

e2.printStackTrace(); } catch (java.lang.Exception e3) {

e3.printStackTrace();}

return null; }

/************************************************************

Function: // decryptMode(byte[] src,byte[] key)

Description: // 3DES_ECB_DE

Input: // src-源数据(byte[]) key-解密秘钥(byte[])

Output: // 解密后的数据

Return: // byte[]

*************************************************************/

public static byte[] decryptMode(byte[] src ,byte[] key) {

try {SecretKey deskey = new SecretKeySpec(key, Algorithm);

Cipher c1 = Cipher.getInstance("DESede/ECB/NoPadding");

c1.init(Cipher.DECRYPT_MODE, deskey); //初始化为解密模式44

return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) {

e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) {

e2.printStackTrace(); } catch (java.lang.Exception e3) {

e3.printStackTrace(); } return null; }

/************************************************************

Function: // length_process(String src)

Description: // 计算MAC时用到，字符串长度处理为8byte的倍数

Input: // src-待变长的源数据(String)

Output: // 变长后后的源数据

Return: // String

*************************************************************/

private static String length_process(String src) {

if(src.length()%16==0){

return src;

}else if(src.length()%16==14){

return src+"80";

}else{

src+"80";

while(src.length()%8!=0){

src+="0";

}

return src;

}

}

public static String DES_ECB_EN(String data){

String msg = length_process(data);

byte[] Util.hexStringToByteArray(msg);

byte[] secretStr = SecretUtils.encryptMode(src,keyBytes); //调用加密方法16

System.out.println("【Card Cryptogram DATA明文是】：" + msg);

System.out.println("【Card Cryptogram 全部加密文是】：" + Util.byteArrayToHexString(secretStr));

return Util.byteArrayToHexString(secretStr);

}

public static String DES_ECB_DE(String secretStr){

byte[] myMsg = SecretUtils.decryptMode(Util.hexStringToByteArray(secretStr),keyBytes); //调用解密方法17

System.out.println("【Card Cryptogram DATA解密是】：" + Util.byteArrayToHexString(myMsg));

return Util.byteArrayToHexString(myMsg);

}

}