Java实现与JS相同的Des加解密算法完整实例

本文实例讲述了Java实现与JS相同的Des加解密算法。分享给大家供大家参考，具体如下：

这里演示java与js实现相同的des加解密算法，不多说，不废话，直接上代码

一、java实现

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package com.lyz.base.des;

import java.util.ArrayList;

import java.util.List;

/**

* DES加密/解密

*

* @author liuyazhuang

* @see DESCore

*/

public class Des {

public Des() {

}

public static void main(String[] args) {

Des desObj = new Des();

String key1 = "1";

String key2 = "2";

String key3 = "3";

String data = "jb51.net";

String str = desObj.strEnc(data, key1, key2, key3);

System.out.println("快网idc测试结果：");

System.out.println(str);

String dec = desObj.strDec(str, key1, key2, key3);

System.out.println(dec);

}

/**

* DES加密/解密

*

* @author liuyazhuang

* @see DESCore

*/

/*

* encrypt the string to string made up of hex return the encrypted string

*/

public String strEnc(String data, String firstKey, String secondKey,

String thirdKey) {

int leng = data.length();

String encData = "";

List firstKeyBt = null, secondKeyBt = null, thirdKeyBt = null;

int firstLength = 0, secondLength = 0, thirdLength = 0;

if (firstKey != null && firstKey != "") {

firstKeyBt = getKeyBytes(firstKey);

firstLength = firstKeyBt.size();

}

if (secondKey != null && secondKey != "") {

secondKeyBt = getKeyBytes(secondKey);

secondLength = secondKeyBt.size();

}

if (thirdKey != null && thirdKey != "") {

thirdKeyBt = getKeyBytes(thirdKey);

thirdLength = thirdKeyBt.size();

}

if (leng > 0) {

if (leng < 4) {

int[] bt = strToBt(data);

int[] encByte = null;

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "" && thirdKey != null

&& thirdKey != "") {

int[] tempBt;

int x, y, z;

tempBt = bt;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

for (z = 0; z < thirdLength; z++) {

tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "") {

int[] tempBt;

int x, y;

tempBt = bt;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != "") {

int[] tempBt;

int x = 0;

tempBt = bt;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

encByte = tempBt;

}

encData = bt64ToHex(encByte);

} else {

int iterator = (leng / 4);

int remainder = leng % 4;

int i = 0;

for (i = 0; i < iterator; i++) {

String tempData = data.substring(i * 4 + 0, i * 4 + 4);

int[] tempByte = strToBt(tempData);

int[] encByte = null;

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "" && thirdKey != null

&& thirdKey != "") {

int[] tempBt;

int x, y, z;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

for (z = 0; z < thirdLength; z++) {

tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != ""

&& secondKey != null && secondKey != "") {

int[] tempBt;

int x, y;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != "") {

int[] tempBt;

int x;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt

.get(x));

}

encByte = tempBt;

}

encData += bt64ToHex(encByte);

}

if (remainder > 0) {

String remainderData = data.substring(iterator * 4 + 0,

leng);

int[] tempByte = strToBt(remainderData);

int[] encByte = null;

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "" && thirdKey != null

&& thirdKey != "") {

int[] tempBt;

int x, y, z;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

for (z = 0; z < thirdLength; z++) {

tempBt = enc(tempBt, (int[]) thirdKeyBt.get(z));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != ""

&& secondKey != null && secondKey != "") {

int[] tempBt;

int x, y;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt.get(x));

}

for (y = 0; y < secondLength; y++) {

tempBt = enc(tempBt, (int[]) secondKeyBt.get(y));

}

encByte = tempBt;

} else {

if (firstKey != null && firstKey != "") {

int[] tempBt;

int x;

tempBt = tempByte;

for (x = 0; x < firstLength; x++) {

tempBt = enc(tempBt, (int[]) firstKeyBt

.get(x));

}

encByte = tempBt;

}

encData += bt64ToHex(encByte);

}

return encData;

}

/*

* decrypt the encrypted string to the original string

* return the original string

*/

public String strDec(String data, String firstKey, String secondKey,

String thirdKey) {

int leng = data.length();

String decStr = "";

List firstKeyBt = null, secondKeyBt = null, thirdKeyBt = null;

int firstLength = 0, secondLength = 0, thirdLength = 0;

if (firstKey != null && firstKey != "") {

firstKeyBt = getKeyBytes(firstKey);

firstLength = firstKeyBt.size();

}

if (secondKey != null && secondKey != "") {

secondKeyBt = getKeyBytes(secondKey);

secondLength = secondKeyBt.size();

}

if (thirdKey != null && thirdKey != "") {

thirdKeyBt = getKeyBytes(thirdKey);

thirdLength = thirdKeyBt.size();

}

int iterator = leng / 16;

int i = 0;

for (i = 0; i < iterator; i++) {

String tempData = data.substring(i * 16 + 0, i * 16 + 16);

String strByte = hexToBt64(tempData);

int[] intByte = new int[64];

int j = 0;

for (j = 0; j < 64; j++) {

intByte[j] = Integer.parseInt(strByte.substring(j, j + 1));

}

int[] decByte = null;

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "" && thirdKey != null && thirdKey != "") {

int[] tempBt;

int x, y, z;

tempBt = intByte;

for (x = thirdLength - 1; x >= 0; x--) {

tempBt = dec(tempBt, (int[]) thirdKeyBt.get(x));

}

for (y = secondLength - 1; y >= 0; y--) {

tempBt = dec(tempBt, (int[]) secondKeyBt.get(y));

}

for (z = firstLength - 1; z >= 0; z--) {

tempBt = dec(tempBt, (int[]) firstKeyBt.get(z));

}

decByte = tempBt;

} else {

if (firstKey != null && firstKey != "" && secondKey != null

&& secondKey != "") {

int[] tempBt;

int x, y, z;

tempBt = intByte;

for (x = secondLength - 1; x >= 0; x--) {

tempBt = dec(tempBt, (int[]) secondKeyBt.get(x));

}

for (y = firstLength - 1; y >= 0; y--) {

tempBt = dec(tempBt, (int[]) firstKeyBt.get(y));

}

decByte = tempBt;

} else {

if (firstKey != null && firstKey != "") {

int[] tempBt;

int x, y, z;

tempBt = intByte;

for (x = firstLength - 1; x >= 0; x--) {

tempBt = dec(tempBt, (int[]) firstKeyBt.get(x));

}

decByte = tempBt;

}

decStr += byteToString(decByte);

}

return decStr;

}

/*

* chang the string into the bit array

*

* return bit array(it's length % 64 = 0)

*/

public List getKeyBytes(String key) {

List keyBytes = new ArrayList();

int leng = key.length();

int iterator = (leng / 4);

int remainder = leng % 4;

int i = 0;

for (i = 0; i < iterator; i++) {

keyBytes.add(i, strToBt(key.substring(i * 4 + 0, i * 4 + 4)));

}

if (remainder > 0) {

// keyBytes[i] = strToBt(key.substring(i*4+0,leng));

keyBytes.add(i, strToBt(key.substring(i * 4 + 0, leng)));

}

return keyBytes;

}

/*

* chang the string(it's length <= 4) into the bit array

*

* return bit array(it's length = 64)

*/

public int[] strToBt(String str) {

int leng = str.length();

int[] bt = new int[64];

if (leng < 4) {

int i = 0, j = 0, p = 0, q = 0;

for (i = 0; i < leng; i++) {

int k = str.charAt(i);

for (j = 0; j < 16; j++) {

int pow = 1, m = 0;

for (m = 15; m > j; m--) {

pow *= 2;

}

// bt.set(16*i+j,""+(k/pow)%2));

bt[16 * i + j] = (k / pow) % 2;

}

for (p = leng; p < 4; p++) {

int k = 0;

for (q = 0; q < 16; q++) {

int pow = 1, m = 0;

for (m = 15; m > q; m--) {

pow *= 2;

}

// bt[16*p+q]=parseInt(k/pow)%2;

// bt.add(16*p+q,""+((k/pow)%2));

bt[16 * p + q] = (k / pow) % 2;

}

} else {

for (int i = 0; i < 4; i++) {

int k = str.charAt(i);

for (int j = 0; j < 16; j++) {

int pow = 1;

for (int m = 15; m > j; m--) {

pow *= 2;

}

// bt[16*i+j]=parseInt(k/pow)%2;

// bt.add(16*i+j,""+((k/pow)%2));

bt[16 * i + j] = (k / pow) % 2;

}

return bt;

}

/*

* chang the bit(it's length = 4) into the hex

*

* return hex

*/

public String bt4ToHex(String binary) {

String hex = "";

if (binary.equalsIgnoreCase("0000")) {

hex = "0";

} else if (binary.equalsIgnoreCase("0001")) {

hex = "1";

} else if (binary.equalsIgnoreCase("0010")) {

hex = "2";

} else if (binary.equalsIgnoreCase("0011")) {

hex = "3";

} else if (binary.equalsIgnoreCase("0100")) {

hex = "4";

} else if (binary.equalsIgnoreCase("0101")) {

hex = "5";

} else if (binary.equalsIgnoreCase("0110")) {

hex = "6";

} else if (binary.equalsIgnoreCase("0111")) {

hex = "7";

} else if (binary.equalsIgnoreCase("1000")) {

hex = "8";

} else if (binary.equalsIgnoreCase("1001")) {

hex = "9";

} else if (binary.equalsIgnoreCase("1010")) {

hex = "A";

} else if (binary.equalsIgnoreCase("1011")) {

hex = "B";

} else if (binary.equalsIgnoreCase("1100")) {

hex = "C";

} else if (binary.equalsIgnoreCase("1101")) {

hex = "D";

} else if (binary.equalsIgnoreCase("1110")) {

hex = "E";

} else if (binary.equalsIgnoreCase("1111")) {

hex = "F";

}

return hex;

}

/*

* chang the hex into the bit(it's length = 4)

运行结果：

Java实现与JS相同的Des加解密算法完整实例

二、JS实现

1、des.js文件

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/**

* DES加密/解密

* @author liuyazhuang

* @see DESCore

*/

/*

* encrypt the string to string made up of hex

* return the encrypted string

*/

function strEnc(data,firstKey,secondKey,thirdKey){

var leng = data.length;

var encData = "";

var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength;

if(firstKey != null && firstKey != ""){

firstKeyBt = getKeyBytes(firstKey);

firstLength = firstKeyBt.length;

}

if(secondKey != null && secondKey != ""){

secondKeyBt = getKeyBytes(secondKey);

secondLength = secondKeyBt.length;

}

if(thirdKey != null && thirdKey != ""){

thirdKeyBt = getKeyBytes(thirdKey);

thirdLength = thirdKeyBt.length;

}

if(leng > 0){

if(leng < 4){

var bt = strToBt(data);

var encByte ;

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){

var tempBt;

var x,y,z;

tempBt = bt;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

for(z = 0;z < thirdLength ;z ++){

tempBt = enc(tempBt,thirdKeyBt[z]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){

var tempBt;

var x,y;

tempBt = bt;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !=""){

var tempBt;

var x = 0;

tempBt = bt;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

encByte = tempBt;

}

encData = bt64ToHex(encByte);

}else{

var iterator = parseInt(leng/4);

var remainder = leng%4;

var i=0;

for(i = 0;i < iterator;i++){

var tempData = data.substring(i*4+0,i*4+4);

var tempByte = strToBt(tempData);

var encByte ;

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){

var tempBt;

var x,y,z;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

for(z = 0;z < thirdLength ;z ++){

tempBt = enc(tempBt,thirdKeyBt[z]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){

var tempBt;

var x,y;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !=""){

var tempBt;

var x;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

encByte = tempBt;

}

encData += bt64ToHex(encByte);

}

if(remainder > 0){

var remainderData = data.substring(iterator*4+0,leng);

var tempByte = strToBt(remainderData);

var encByte ;

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){

var tempBt;

var x,y,z;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

for(z = 0;z < thirdLength ;z ++){

tempBt = enc(tempBt,thirdKeyBt[z]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){

var tempBt;

var x,y;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

for(y = 0;y < secondLength ;y ++){

tempBt = enc(tempBt,secondKeyBt[y]);

}

encByte = tempBt;

}else{

if(firstKey != null && firstKey !=""){

var tempBt;

var x;

tempBt = tempByte;

for(x = 0;x < firstLength ;x ++){

tempBt = enc(tempBt,firstKeyBt[x]);

}

encByte = tempBt;

}

encData += bt64ToHex(encByte);

}

return encData;

}

/*

* decrypt the encrypted string to the original string

*

* return the original string

*/

function strDec(data,firstKey,secondKey,thirdKey){

var leng = data.length;

var decStr = "";

var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength;

if(firstKey != null && firstKey != ""){

firstKeyBt = getKeyBytes(firstKey);

firstLength = firstKeyBt.length;

}

if(secondKey != null && secondKey != ""){

secondKeyBt = getKeyBytes(secondKey);

secondLength = secondKeyBt.length;

}

if(thirdKey != null && thirdKey != ""){

thirdKeyBt = getKeyBytes(thirdKey);

thirdLength = thirdKeyBt.length;

}

var iterator = parseInt(leng/16);

var i=0;

for(i = 0;i < iterator;i++){

var tempData = data.substring(i*16+0,i*16+16);

var strByte = hexToBt64(tempData);

var intByte = new Array(64);

var j = 0;

for(j = 0;j < 64; j++){

intByte[j] = parseInt(strByte.substring(j,j+1));

}

var decByte;

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){

var tempBt;

var x,y,z;

tempBt = intByte;

for(x = thirdLength - 1;x >= 0;x --){

tempBt = dec(tempBt,thirdKeyBt[x]);

}

for(y = secondLength - 1;y >= 0;y --){

tempBt = dec(tempBt,secondKeyBt[y]);

}

for(z = firstLength - 1;z >= 0 ;z --){

tempBt = dec(tempBt,firstKeyBt[z]);

}

decByte = tempBt;

}else{

if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){

var tempBt;

var x,y,z;

tempBt = intByte;

for(x = secondLength - 1;x >= 0 ;x --){

tempBt = dec(tempBt,secondKeyBt[x]);

}

for(y = firstLength - 1;y >= 0 ;y --){

tempBt = dec(tempBt,firstKeyBt[y]);

}

decByte = tempBt;

}else{

if(firstKey != null && firstKey !=""){

var tempBt;

var x,y,z;

tempBt = intByte;

for(x = firstLength - 1;x >= 0 ;x --){

tempBt = dec(tempBt,firstKeyBt[x]);

}

decByte = tempBt;

}

decStr += byteToString(decByte);

}

return decStr;

}

/*

* chang the string into the bit array

*

* return bit array(it's length % 64 = 0)

*/

function getKeyBytes(key){

var keyBytes = new Array();

var leng = key.length;

var iterator = parseInt(leng/4);

var remainder = leng%4;

var i = 0;

for(i = 0;i < iterator; i ++){

keyBytes[i] = strToBt(key.substring(i*4+0,i*4+4));

}

if(remainder > 0){

keyBytes[i] = strToBt(key.substring(i*4+0,leng));

}

return keyBytes;

}

/*

* chang the string(it's length <= 4) into the bit array

*

* return bit array(it's length = 64)

*/

function strToBt(str){

var leng = str.length;

var bt = new Array(64);

if(leng < 4){

var i=0,j=0,p=0,q=0;

for(i = 0;i<leng;i++){

var k = str.charCodeAt(i);

for(j=0;j<16;j++){

var pow=1,m=0;

for(m=15;m>j;m--){

pow *= 2;

}

bt[16*i+j]=parseInt(k/pow)%2;

}

for(p = leng;p<4;p++){

var k = 0;

for(q=0;q<16;q++){

var pow=1,m=0;

for(m=15;m>q;m--){

pow *= 2;

}

bt[16*p+q]=parseInt(k/pow)%2;

}

}else{

for(i = 0;i<4;i++){

var k = str.charCodeAt(i);

for(j=0;j<16;j++){

var pow=1;

for(m=15;m>j;m--){

pow *= 2;

}

bt[16*i+j]=parseInt(k/pow)%2;

}

return bt;

}

/*

* chang the bit(it's length = 4) into the hex

*

* return hex

*/

function bt4ToHex(binary) {

var hex;

switch (binary) {

case "0000" : hex = "0"; break;

case "0001" : hex = "1"; break;

case "0010" : hex = "2"; break;

case "0011" : hex = "3"; break;

case "0100" : hex = "4"; break;

case "0101" : hex = "5"; break;

case "0110" : hex = "6"; break;

case "0111" : hex = "7"; break;

case "1000" : hex = "8"; break;

case "1001" : hex = "9"; break;

case "1010" : hex = "A"; break;

case "1011" : hex = "B"; break;

case "1100" : hex = "C"; break;

case "1101" : hex = "D"; break;

case "1110" : hex = "E"; break;

case "1111" : hex = "F"; break;

}

return hex;

}

/*

* chang the hex into the bit(it's length = 4)

*

* return the bit(it's length = 4)

*/

function hexToBt4(hex) {

var binary;

switch (hex) {

case "0" : binary = "0000"; break;

case "1" : binary = "0001"; break;

case "2" : binary = "0010"; break;

case "3" : binary = "0011"; break;

case "4" : binary = "0100"; break;

case "5" : binary = "0101"; break;

case "6" : binary = "0110"; break;

case "7" : binary = "0111"; break;

case "8" : binary = "1000"; break;

case "9" : binary = "1001"; break;

case "A" : binary = "1010"; break;

case "B" : binary = "1011"; break;

case "C" : binary = "1100"; break;

case "D" : binary = "1101"; break;

case "E" : binary = "1110"; break;

case "F" : binary = "1111"; break;

}

return binary;

}

/*

* chang the bit(it's length = 64) into the string

*

* return string

*/

function byteToString(byteData){

var str="";

for(i = 0;i<4;i++){

var count=0;

for(j=0;j<16;j++){

var pow=1;

for(m=15;m>j;m--){

pow*=2;

}

count+=byteData[16*i+j]*pow;

}

if(count != 0){

str+=String.fromCharCode(count);

}

return str;

}

function bt64ToHex(byteData){

var hex = "";

for(i = 0;i<16;i++){

var bt = "";

for(j=0;j<4;j++){

bt += byteData[i*4+j];

}

hex+=bt4ToHex(bt);

}

return hex;

2、des.html文件

Java实现与JS相同的Des加解密算法完整实例

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