DES单倍长 双倍长加密,POS机行业基本会用到
package com.joker.utils;
import java.io.UnsupportedEncodingException;
public class DESedeTool {
/***************************** 压缩替换S-Box�? **************************************************/
private static final int[][] s1 = {
{ 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 },
{ 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8 },
{ 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0 },
{ 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 } };
private static final int[][] s2 = {
{ 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 },
{ 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5 },
{ 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15 },
{ 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 } };
private static final int[][] s3 = {
{ 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 },
{ 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 },
{ 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 },
{ 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 } };
private static final int[][] s4 = {
{ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 },
{ 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 },// erorr
{ 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 },
{ 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 } };
private static final int[][] s5 = {
{ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },
{ 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 },
{ 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 },
{ 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 } };
private static final int[][] s6 = {
{ 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 },
{ 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 },
{ 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 },
{ 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 } };
private static final int[][] s7 = {
{ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 },
{ 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 },
{ 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 },
{ 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 } };
private static final int[][] s8 = {
{ 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 },
{ 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 },
{ 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 },
{ 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 } };
private static final int[] ip = { 58, 50, 42, 34, 26, 18, 10, 2,
60, 52, 44, 36, 28, 20, 12, 4,
62, 54, 46, 38, 30, 22, 14, 6,
64, 56, 48, 40, 32, 24, 16, 8,
57, 49, 41, 33, 25, 17, 9, 1,
59, 51, 43, 35, 27, 19, 11, 3,
61, 53, 45, 37, 29, 21, 13, 5,
63, 55, 47, 39, 31, 23, 15, 7 };
private static final int[] _ip = { 40, 8, 48, 16, 56, 24, 64, 32,
39, 7, 47, 15, 55, 23, 63, 31,
38, 6, 46, 14, 54, 22, 62, 30,
37, 5, 45, 13, 53, 21, 61, 29,
36, 4, 44, 12, 52, 20, 60, 28,
35, 3, 43, 11, 51, 19, 59, 27,
34, 2, 42, 10, 50, 18, 58, 26,
33, 1, 41, 9, 49, 17, 57, 25 };
// 每次密钥循环左移位数
private static final int[] LS = { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2,
2, 1 };
private static int[][] subKey = new int[16][48];
private static int HEX = 0;
private static int ASC = 1;
/**
*
* 将十六进制A--F转换成对应数�?
*
* @param ch
*
* @return
*
* @throws Exception
*/
public static int getIntByChar(char ch) throws Exception {
char t = Character.toUpperCase(ch);
int i = 0;
switch (t) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
i = Integer.parseInt(Character.toString(t));
break;
case 'A':
i = 10;
break;
case 'B':
i = 11;
break;
case 'C':
i = 12;
break;
case 'D':
i = 13;
break;
case 'E':
i = 14;
break;
case 'F':
i = 15;
break;
default:
throw new Exception("getIntByChar was wrong");
}
return i;
}
/**
*
* 将字符串转换成二进制数组
*
* @param source
* : 16字节
*
* @return
*/
public static int[] string2Binary(String source) {
int len = source.length();
int[] dest = new int[len * 4];
char[] arr = source.toCharArray();
for (int i = 0; i < len; i++) {
int t = 0;
try {
t = getIntByChar(arr[i]);
// System.out.println(arr[i]);
} catch (Exception e) {
e.printStackTrace();
}
String[] str = Integer.toBinaryString(t).split("");
int k = i * 4 + 3;
for (int j = str.length - 1; j > 0; j--) {
dest[k] = Integer.parseInt(str[j]);
k--;
}
}
return dest;
}
/**
*
* 返回x的y次方
*
* @param x
*
* @param y
*
* @return
*/
public static int getXY(int x, int y) {
int temp = x;
if (y == 0)
x = 1;
for (int i = 2; i <= y; i++) {
x *= temp;
}
return x;
}
/**
*
* s�?位长度的二进制字符串
*
* @param s
*
* @return
*/
public static String binary2Hex(String s) {
int len = s.length();
int result = 0;
int k = 0;
if (len > 4)
return null;
for (int i = len; i > 0; i--) {
result += Integer.parseInt(s.substring(i - 1, i)) * getXY(2, k);
k++;
}
switch (result) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
return "" + result;
case 10:
return "A";
case 11:
return "B";
case 12:
return "C";
case 13:
return "D";
case 14:
return "E";
case 15:
return "F";
default:
return null;
}
}
/**
*
* 将int转换成Hex
*
* @param i
*
* @return
*
* @throws Exception
*/
public static String int2Hex(int i) {
switch (i) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
return "" + i;
case 10:
return "A";
case 11:
return "B";
case 12:
return "C";
case 13:
return "D";
case 14:
return "E";
case 15:
return "F";
default:
return null;
}
}
/**
*
* 将二进制字符串转换成十六进制字符�?
*
* @param s
*
* @return
*/
public static String binary2ASC(String s) {
String str = "";
int ii = 0;
int len = s.length();
// 不够4bit左补0
if (len % 4 != 0) {
while (ii < 4 - len % 4) {
s = "0" + s;
}
}
for (int i = 0; i < len / 4; i++) {
str += binary2Hex(s.substring(i * 4, i * 4 + 4));
}
return str;
}
/**
*
* IP初始置换
*
* @param source
*
* @return
*/
public static int[] changeIP(int[] source) {
int[] dest = new int[64];
for (int i = 0; i < 64; i++) {
dest[i] = source[ip[i] - 1];
}
return dest;
}
/**
*
* IP-1逆置�?
*
* @param source
*
* @return
*/
public static int[] changeInverseIP(int[] source) {
int[] dest = new int[64];
for (int i = 0; i < 64; i++) {
dest[i] = source[_ip[i] - 1];
}
return dest;
}
/**
*
* �?2bit扩展�?8bit
*
* @param source
*
* @return
*/
public static int[] expend(int[] source) {
int[] ret = new int[48];
int[] temp = { 32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
8, 9, 10, 11, 12, 13,
12, 13, 14, 15, 16, 17,
16, 17, 18, 19, 20, 21,
20, 21, 22, 23, 24, 25,
24, 25, 26, 27, 28, 29,
28, 29, 30, 31, 32, 1 };
for (int i = 0; i < 48; i++) {
ret[i] = source[temp[i] - 1];
}
return ret;
}
/**
*
* �?8bit压缩�?2bit
*
* @param source
* (48bit)
*
* @return R(32bit)
*
* B=E(R)⊕K，将48 位的B 分成8 个分组，B=B1B2B3B4B5B6B7B8
*/
public static int[] press(int[] source) {
int[] ret = new int[32];
int[][] temp = new int[8][6];
int[][][] s = { s1, s2, s3, s4, s5, s6, s7, s8 };
StringBuffer str = new StringBuffer();
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 6; j++) {
temp[i][j] = source[i * 6 + j];
}
}
for (int i = 0; i < 8; i++) {
// (16)
int x = temp[i][0] * 2 + temp[i][5];
// (2345)
int y = temp[i][1] * 8 + temp[i][2] * 4 + temp[i][3] * 2
+ temp[i][4];
int val = s[i][x][y];
String ch = int2Hex(val);
// System.out.println("x=" + x + ",y=" + y + "-->" + ch);
// String ch = Integer.toBinaryString(val);
str.append(ch);
}
// System.out.println(str.toString());
ret = string2Binary(str.toString());
// printArr(ret);
// 置换P
ret = dataP(ret);
return ret;
}
/**
*
* 置换P(32bit)
*
* @param source
*
* @return
*/
public static int[] dataP(int[] source) {
int[] dest = new int[32];
int[] temp = { 16, 7, 20, 21,
29, 12, 28, 17,
1, 15, 23, 26,
5, 18, 31, 10,
2, 8, 24, 14,
32, 27, 3, 9,
19, 13, 30, 6,
22, 11, 4, 25 };
int len = source.length;
for (int i = 0; i < len; i++) {
dest[i] = source[temp[i] - 1];
}
return dest;
}
/**
*
* @param R
* (�?2bit)
*
* @param K
* (48bit的轮子密�?
*
* @return 32bit
*/
public static int[] f(int[] R, int[] K) {
int[] dest = new int[32];
int[] temp = new int[48];
// 先将输入32bit扩展�?8bit
int[] expendR = expend(R);// 48bit
// 与轮子密钥进行异或运�?
temp = diffOr(expendR, K);
// 压缩�?2bit
dest = press(temp);
// System.out.println("need press data----->");
// printArr(temp);
return dest;
}
/**
*
* 两个等长的数组做异或
*
* @param source1
*
* @param source2
*
* @return
*/
public static int[] diffOr(int[] source1, int[] source2) {
int len = source1.length;
int[] dest = new int[len];
for (int i = 0; i < len; i++) {
dest[i] = source1[i] ^ source2[i];
}
return dest;
}
/**
*
* DES加密--->对称密钥
*
* D = Ln(32bit)+Rn(32bit)
*
* 经过16轮置�?
*
* @param D
* (16byte)明文
*
* @param K
* (16byte)轮子密钥
*
* @return (16byte)密文
*/
public static String encryption(String D, String K) {
String str = "";
int[] temp = new int[64];
int[] data = string2Binary(D);
// printArr(data);
// 第一步初始置�?
data = changeIP(data);
// printArr(data);
int[][] left = new int[17][32];
int[][] right = new int[17][32];
for (int j = 0; j < 32; j++) {
left[0][j] = data[j];
right[0][j] = data[j + 32];
}
// printArr(left[0]);
// printArr(right[0]);
setKey(K);// sub key ok
for (int i = 1; i < 17; i++) {
// 获取(48bit)的轮子密�?
int[] key = subKey[i - 1];
// L1 = R0
left[i] = right[i - 1];
// R1 = L0 ^ f(R0,K1)
int[] fTemp = f(right[i - 1], key);// 32bit
right[i] = diffOr(left[i - 1], fTemp);
}
// �?��组合的时候，左右调换**************************************************
for (int i = 0; i < 32; i++) {
temp[i] = right[16][i];
temp[32 + i] = left[16][i];
}
temp = changeInverseIP(temp);
str = binary2ASC(intArr2Str(temp));
return str;
}
/**
*
* DES解密--->对称密钥
*
* 解密算法与加密算法基本相同，不同之处仅在于轮子密钥的使用顺序逆序，即解密的第1
*
* 轮子密钥为加密的�?6 轮子密钥，解密的�? 轮子密钥为加密的�?5 轮子密钥，�?…，
*
* 解密的第16 轮子密钥为加密的�? 轮子密钥�?
*
* @param source密文
*
* @param key密钥
*
* @return
*/
public static String discryption(String source, String key) {
String str = "";
int[] data = string2Binary(source);// 64bit
// 第一步初始置�?
data = changeIP(data);
int[] left = new int[32];
int[] right = new int[32];
int[] tmp = new int[32];
for (int j = 0; j < 32; j++) {
left[j] = data[j];
right[j] = data[j + 32];
}
setKey(key);// sub key ok
for (int i = 16; i > 0; i--) {
// 获取(48bit)的轮子密�?
/********* 不同之处 **********/
int[] sKey = subKey[i - 1];
tmp = left;
// R1 = L0
left = right;
// L1 = R0 ^ f(L0,K1)
int[] fTemp = f(right, sKey);// 32bit
right = diffOr(tmp, fTemp);
}
// �?��组合的时候，左右调换**************************************************
for (int i = 0; i < 32; i++) {
data[i] = right[i];
data[32 + i] = left[i];
}
data = changeInverseIP(data);
for (int i = 0; i < data.length; i++) {
str += data[i];
}
str = binary2ASC(str);
return str;
}
/**
*
* 单�?长密钥DES(16byte)
*
* @param source
*
* @param key
*
* @param type
* 0:encrypt 1:discrypt
*
* @return
*/
public static String DES_1(String source, String key, int type) {
if (source.length() != 16 || key.length() != 16)
return null;
if (type == 0) {
return encryption(source, key);
}
if (type == 1) {
return discryption(source, key);
}
return null;
}
/**
*
*
*
* @param source
*
* @param key
*
* @param type
* 0:encrypt 1:discrypt
*
* @return
*/
public static String DES_2(String source, String key, int type) {
return null;
}
/**
*
* 三重DES算法(双�?长密�?32byte))
*
* 密钥K1和K2
*
* 1、先用K1加密明文
*
* 2、接�?��K2对上�?��的结果进行解�?
*
* 3、然后用K1对上�?��的结果进行加�?
*
* @param source
*
* @param key
*
* @param type
* 0:encrypt 1:discrypt
*
* @return
*/
public static String DES_3_new(String source, String key, int type) {
String temp = "";
for(int i =0;i<source.length()/16;i++){
String str = source.substring(i*16,(i+1)*16);
temp+=DES_3(str,key,type);
}
return temp;
}
public static String DES_3(String source, String key, int type) {
if (key.length() != 32 || source.length() != 16)
return null;
String temp = null;
String K1 = key.substring(0, key.length() / 2);
String K2 = key.substring(key.length() / 2);
// System.out.println("K1--->" + K1);
//
// System.out.println("K2--->" + K2);
if (type == 0) {
temp = encryption(source, K1);
// System.out.println("step1--->" + temp);
temp = discryption(temp, K2);
// System.out.println("step2--->" + temp);
return encryption(temp, K1);
}
if (type == 1) {
temp = discryption(source, K1);
temp = encryption(temp, K2);
return discryption(temp, K1);
}
return null;
}
/************************************ 48bit的轮子密钥的生成 **********************************************************/
/**
*
* �?4bit的密钥转换成56bit
*
* @param source
*
* @return
*/
public static int[] keyPC_1(int[] source) {
int[] dest = new int[56];
int[] temp = { 57, 49, 41, 33, 25, 17, 9,
1, 58, 50, 42, 34, 26, 18,
10, 2, 59, 51, 43, 35, 27,
19, 11, 3, 60, 52, 44, 36,
63, 55, 47, 39, 31, 23, 15,
7, 62, 54, 46, 38, 30, 22,
14, 6, 61, 53, 45, 37, 29,
21, 13, 5, 28, 20, 12, 4 };
for (int i = 0; i < 56; i++) {
dest[i] = source[temp[i] - 1];
}
return dest;
}
/**
*
* 将密钥循环左移i�?
*
* @param source
* 二进制密钥数�?
*
* @param i
* 循环左移位数
*
* @return
*/
public static int[] keyLeftMove(int[] source, int i) {
int temp = 0;
int len = source.length;
int ls = LS[i];
// System.out.println("len" + len + ",LS[" + i + "]=" + ls);
for (int k = 0; k < ls; k++) {
temp = source[0];
for (int j = 0; j < len - 1; j++) {
source[j] = source[j + 1];
}
source[len - 1] = temp;
}
return source;
}
/**
*
* �?6bit的密钥转换成48bit
*
* @param source
*
* @return
*/
public static int[] keyPC_2(int[] source) {
int[] dest = new int[48];
int[] temp = { 14, 17, 11, 24, 1, 5,
3, 28, 15, 6, 21, 10,
23, 19, 12, 4, 26, 8,
16, 7, 27, 20, 13, 2,
41, 52, 31, 37, 47, 55,
30, 40, 51, 45, 33, 48,
44, 49, 39, 56, 34, 53,
46, 42, 50, 36, 29, 32 };
for (int i = 0; i < 48; i++) {
dest[i] = source[temp[i] - 1];
}
return dest;
}
/**
*
* 获取轮子密钥(48bit)
*
* @param source
*
* @return
*/
public static void setKey(String source) {
if (subKey.length > 0)
subKey = new int[16][48];
// 装换�?4bit
int[] temp = string2Binary(source);
// �?6bit均分成两部分
int[] left = new int[28];
int[] right = new int[28];
// 经过PC-1�?4bit转换�?6bit
int[] temp1 = new int[56];
temp1 = keyPC_1(temp);
// printArr(temp1);
// 将经过转换的temp1均分成两部分
for (int i = 0; i < 28; i++) {
left[i] = temp1[i];
right[i] = temp1[i + 28];
}
// 经过16次循环左移，然后PC-2置换
for (int i = 0; i < 16; i++) {
left = keyLeftMove(left, LS[i]);
right = keyLeftMove(right, LS[i]);
for (int j = 0; j < 28; j++) {
temp1[j] = left[j];
temp1[j + 28] = right[j];
}
// printArr(temp1);
subKey[i] = keyPC_2(temp1);
}
}
public static void printArr(int[] source) {
int len = source.length;
for (int i = 0; i < len; i++) {
System.out.print(source[i]);
}
System.out.println();
}
/**
*
* 将ASC字符串转�?6进制字符�?
*
* @param asc
*
* @return
*/
public static String ASC_2_HEX(String asc) {
StringBuffer hex = new StringBuffer();
try {
byte[] bs = asc.toUpperCase().getBytes("UTF-8");
for (byte b : bs) {
hex.append(Integer.toHexString(new Byte(b).intValue()));
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return hex.toString();
}
/**
*
* �?6进制的字符串转换成ASC的字符串
*
* �?6进制的字符串压缩成BCD�?30313233343536373839414243444546)-->(0123456789ABCDEF)
*
* @param hex
*
* @return
*/
public static String HEX_2_ASC(String hex) {
String asc = null;
int len = hex.length();
byte[] bs = new byte[len / 2];
for (int i = 0; i < len / 2; i++) {
bs[i] = Byte.parseByte(hex.substring(i * 2, i * 2 + 2), 16);
}
try {
asc = new String(bs, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return asc;
}
/**
*
* 计算MAC(hex)
*
* ANSI-X9.9-MAC(16的整数�?不补)
*
* PBOC-DES-MAC(16的整数�?�?000000000000000)
*
* 使用单�?长密钥DES算法
*
* @param key密钥
* (16byte)
*
* @param vector初始向量0000000000000000
*
* @param data数据
*
* @return mac
*/
public static String MAC(String key, String vector, String data, int type) {
if (type == ASC) {
data = ASC_2_HEX(data);
}
int len = data.length();
int arrLen = len / 16 + 1;
String[] D = new String[arrLen];
if (vector == null)
vector = "0000000000000000";
if (len % 16 == 0) {
data += "8000000000000000";
} else {
data += "80";
for (int i = 0; i < 15 - len % 16; i++) {
data += "00";
}
}
for (int i = 0; i < arrLen; i++) {
D[i] = data.substring(i * 16, i * 16 + 16);
System.out.println("D[" + i + "]=" + D[i]);
}
// D0 Xor Vector
String I = xOr(D[0], vector);
String O = null;
for (int i = 1; i < arrLen; i++) {
// System.out.println(i + "**************");
// System.out.println("I=" + I);
O = DES_1(I, key, 0);
// System.out.println("O=" + O);
I = xOr(D[i], O);
// System.out.println("I=" + I);
}
I = DES_1(I, key, 0);
return I;
}
/**
*
* 将s1和s2做异或，然后返回
*
* @param s1
*
* @param s2
*
* @return
*/
public static String xOr(String s1, String s2) {
int[] iArr = diffOr(string2Binary(s1), string2Binary(s2));
return binary2ASC(intArr2Str(iArr));
}
/**
*
* 将int类型数组拼接成字符串
*
* @param arr
*
* @return
*/
public static String intArr2Str(int[] arr) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < arr.length; i++) {
sb.append(arr[i]);
}
return sb.toString();
}
/**
*
* 将data分散
*
* @param data
*
* @param key
*
* @param type
*
* @return
*/
public static String divData(String data, String key, int type) {
String left = null;
String right = null;
if (type == HEX) {
left = key.substring(0, 16);
right = key.substring(16, 32);
}
if (type == ASC) {
left = ASC_2_HEX(key.substring(0, 8));
right = ASC_2_HEX(key.substring(8, 16));
}
// 加密
data = DES_1(data, left, 0);
// 解密
data = DES_1(data, right, 1);
// 加密
data = DES_1(data, left, 0);
return data;
}
/**
*
* 取反(10001)--->(01110)
*
* @param source
*
* @return
*/
public static String reverse(String source) {
int[] data = string2Binary(source);
int j = 0;
for (int i : data) {
data[j++] = 1 - i;
}
return binary2ASC(intArr2Str(data));
}
/**
*
* 主密钥需要经过两次分散获得IC卡中的子密钥
*
* @param issuerFlag发卡方标识符
*
* @param appNo应用序列号即卡号
*
* @param mpk主密钥
*
* @return
*/
public static String getDPK(String issuerFlag, String appNo, String mpk) {
// 第一次分散
StringBuffer issuerMPK = new StringBuffer();
// 获取Issuer MPK左半边
issuerMPK.append(divData(issuerFlag, mpk, 0));
// 获取Issuer MPK右半边
issuerMPK.append(divData(reverse(issuerFlag), mpk, 0));
// 第二次分散
StringBuffer dpk = new StringBuffer();
// 获取DPK左半边
dpk.append(divData(appNo, issuerMPK.toString(), 0));
// 获取DPK右半边
dpk.append(divData(reverse(appNo), issuerMPK.toString(), 0));
return dpk.toString();
}
/**
*
* 三重DES算法(双�?长密�?32byte))
*
* 密钥K1和K2
*
* 1、先用K1加密明文
*
* 2、接�?��K2对上�?��的结果进行解�?
*
* 3、然后用K1对上�?��的结果进行加�?
*
* @param source
*
* @param key
*
* @param type
* 0:encrypt 1:discrypt
*
* @return
*/
public static String DEDES_3(String source, String key, int type) {
if (key.length() != 32 || source.length() != 16)
return null;
String temp = null;
String K1 = key.substring(0, key.length() / 2);
String K2 = key.substring(key.length() / 2);
// System.out.println("K1--->" + K1);
// System.out.println("K2--->" + K2);
if (type == 0) {
temp = encryption(source, K1);
// System.out.println("step1--->" + temp);
temp = discryption(temp, K2);
// System.out.println("step2--->" + temp);
return encryption(temp, K1);
}
if (type == 1) {
temp = discryption(source, K1);
temp = encryption(temp, K2);
return discryption(temp, K1);
}
return null;
}
public static void main(String[] args) throws Exception {
//B2E8F2E11778F601
//7576242348C58915
System.out.println(DES_1("3630ADF459CB24DA", "87077F2FD88BD8B8", 0));
System.out.println(DES_1("3630ADF459CB24DA", "87077F2FD88BD8B87576242348C58915", 1));
}
}