Des加密解密（js+java结果一致）

des加密算法，javascript版本和java版本

目录：

　　1.JavaScript文件（des.js）

　　2.java文件(des.java)

 

1、JavaScript文件（des.js）

/**
* DES加密/解密
* @Copyright Copyright (c) 2006
* @author Guapo
* @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;
}

function hexToBt64(hex){
 var binary = "";
 for(i = 0;i<16;i++){
   binary+=hexToBt4(hex.substring(i,i+1));
 }
 return binary;
}

/*
* the 64 bit des core arithmetic
*/

function enc(dataByte,keyByte){  
 var keys = generateKeys(keyByte);    
 var ipByte   = initPermute(dataByte);  
 var ipLeft   = new Array(32);
 var ipRight  = new Array(32);
 var tempLeft = new Array(32);
 var i = 0,j = 0,k = 0,m = 0, n = 0;
 for(k = 0;k < 32;k ++){
   ipLeft[k] = ipByte[k];
   ipRight[k] = ipByte[32+k];
 }    
 for(i = 0;i < 16;i ++){
   for(j = 0;j < 32;j ++){
     tempLeft[j] = ipLeft[j];
     ipLeft[j] = ipRight[j];      
   }  
   var key = new Array(48);
   for(m = 0;m < 48;m ++){
     key[m] = keys[i][m];
   }
   var  tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);      
   for(n = 0;n < 32;n ++){
     ipRight[n] = tempRight[n];
   }  
   
 }  
 
 
 var finalData =new Array(64);
 for(i = 0;i < 32;i ++){
   finalData[i] = ipRight[i];
   finalData[32+i] = ipLeft[i];
 }
 return finallyPermute(finalData);  
}

function dec(dataByte,keyByte){  
 var keys = generateKeys(keyByte);    
 var ipByte   = initPermute(dataByte);  
 var ipLeft   = new Array(32);
 var ipRight  = new Array(32);
 var tempLeft = new Array(32);
 var i = 0,j = 0,k = 0,m = 0, n = 0;
 for(k = 0;k < 32;k ++){
   ipLeft[k] = ipByte[k];
   ipRight[k] = ipByte[32+k];
 }  
 for(i = 15;i >= 0;i --){
   for(j = 0;j < 32;j ++){
     tempLeft[j] = ipLeft[j];
     ipLeft[j] = ipRight[j];      
   }  
   var key = new Array(48);
   for(m = 0;m < 48;m ++){
     key[m] = keys[i][m];
   }
   
   var  tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);      
   for(n = 0;n < 32;n ++){
     ipRight[n] = tempRight[n];
   }  
 }  
 
 
 var finalData =new Array(64);
 for(i = 0;i < 32;i ++){
   finalData[i] = ipRight[i];
   finalData[32+i] = ipLeft[i];
 }
 return finallyPermute(finalData);  
}

function initPermute(originalData){
 var ipByte = new Array(64);
 for (i = 0, m = 1, n = 0; i < 4; i++, m += 2, n += 2) {
   for (j = 7, k = 0; j >= 0; j--, k++) {
     ipByte[i * 8 + k] = originalData[j * 8 + m];
     ipByte[i * 8 + k + 32] = originalData[j * 8 + n];
   }
 }    
 return ipByte;
}

function expandPermute(rightData){  
 var epByte = new Array(48);
 for (i = 0; i < 8; i++) {
   if (i == 0) {
     epByte[i * 6 + 0] = rightData[31];
   } else {
     epByte[i * 6 + 0] = rightData[i * 4 - 1];
   }
   epByte[i * 6 + 1] = rightData[i * 4 + 0];
   epByte[i * 6 + 2] = rightData[i * 4 + 1];
   epByte[i * 6 + 3] = rightData[i * 4 + 2];
   epByte[i * 6 + 4] = rightData[i * 4 + 3];
   if (i == 7) {
     epByte[i * 6 + 5] = rightData[0];
   } else {
     epByte[i * 6 + 5] = rightData[i * 4 + 4];
   }
 }      
 return epByte;
}

function xor(byteOne,byteTwo){  
 var xorByte = new Array(byteOne.length);
 for(i = 0;i < byteOne.length; i ++){      
   xorByte[i] = byteOne[i] ^ byteTwo[i];
 }  
 return xorByte;
}

function sBoxPermute(expandByte){
 
   var sBoxByte = new Array(32);
   var binary = "";
   var 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 ]];

       /* Table - s2 */
   var 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 ]];

       /* Table - s3 */
   var 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 ]];
       /* Table - s4 */
   var 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],
       [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 ]];

       /* Table - s5 */
   var 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 ]];

       /* Table - s6 */
   var 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 ]];

       /* Table - s7 */
   var 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]];

       /* Table - s8 */
   var 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]];
   
   for(m=0;m<8;m++){
   var i=0,j=0;
   i = expandByte[m*6+0]*2+expandByte[m*6+5];
   j = expandByte[m * 6 + 1] * 2 * 2 * 2 
     + expandByte[m * 6 + 2] * 2* 2 
     + expandByte[m * 6 + 3] * 2 
     + expandByte[m * 6 + 4];
   switch (m) {
     case 0 :
       binary = getBoxBinary(s1[i][j]);
       break;
     case 1 :
       binary = getBoxBinary(s2[i][j]);
       break;
     case 2 :
       binary = getBoxBinary(s3[i][j]);
       break;
     case 3 :
       binary = getBoxBinary(s4[i][j]);
       break;
     case 4 :
       binary = getBoxBinary(s5[i][j]);
       break;
     case 5 :
       binary = getBoxBinary(s6[i][j]);
       break;
     case 6 :
       binary = getBoxBinary(s7[i][j]);
       break;
     case 7 :
       binary = getBoxBinary(s8[i][j]);
       break;
   }      
   sBoxByte[m*4+0] = parseInt(binary.substring(0,1));
   sBoxByte[m*4+1] = parseInt(binary.substring(1,2));
   sBoxByte[m*4+2] = parseInt(binary.substring(2,3));
   sBoxByte[m*4+3] = parseInt(binary.substring(3,4));
 }
 return sBoxByte;
}

function pPermute(sBoxByte){
 var pBoxPermute = new Array(32);
 pBoxPermute[ 0] = sBoxByte[15]; 
 pBoxPermute[ 1] = sBoxByte[ 6]; 
 pBoxPermute[ 2] = sBoxByte[19]; 
 pBoxPermute[ 3] = sBoxByte[20]; 
 pBoxPermute[ 4] = sBoxByte[28]; 
 pBoxPermute[ 5] = sBoxByte[11]; 
 pBoxPermute[ 6] = sBoxByte[27]; 
 pBoxPermute[ 7] = sBoxByte[16]; 
 pBoxPermute[ 8] = sBoxByte[ 0]; 
 pBoxPermute[ 9] = sBoxByte[14]; 
 pBoxPermute[10] = sBoxByte[22]; 
 pBoxPermute[11] = sBoxByte[25]; 
 pBoxPermute[12] = sBoxByte[ 4]; 
 pBoxPermute[13] = sBoxByte[17]; 
 pBoxPermute[14] = sBoxByte[30]; 
 pBoxPermute[15] = sBoxByte[ 9]; 
 pBoxPermute[16] = sBoxByte[ 1]; 
 pBoxPermute[17] = sBoxByte[ 7]; 
 pBoxPermute[18] = sBoxByte[23]; 
 pBoxPermute[19] = sBoxByte[13]; 
 pBoxPermute[20] = sBoxByte[31]; 
 pBoxPermute[21] = sBoxByte[26]; 
 pBoxPermute[22] = sBoxByte[ 2]; 
 pBoxPermute[23] = sBoxByte[ 8]; 
 pBoxPermute[24] = sBoxByte[18]; 
 pBoxPermute[25] = sBoxByte[12]; 
 pBoxPermute[26] = sBoxByte[29]; 
 pBoxPermute[27] = sBoxByte[ 5]; 
 pBoxPermute[28] = sBoxByte[21]; 
 pBoxPermute[29] = sBoxByte[10]; 
 pBoxPermute[30] = sBoxByte[ 3]; 
 pBoxPermute[31] = sBoxByte[24];    
 return pBoxPermute;
}

function finallyPermute(endByte){    
 var fpByte = new Array(64);  
 fpByte[ 0] = endByte[39]; 
 fpByte[ 1] = endByte[ 7]; 
 fpByte[ 2] = endByte[47]; 
 fpByte[ 3] = endByte[15]; 
 fpByte[ 4] = endByte[55]; 
 fpByte[ 5] = endByte[23]; 
 fpByte[ 6] = endByte[63]; 
 fpByte[ 7] = endByte[31]; 
 fpByte[ 8] = endByte[38]; 
 fpByte[ 9] = endByte[ 6]; 
 fpByte[10] = endByte[46]; 
 fpByte[11] = endByte[14]; 
 fpByte[12] = endByte[54]; 
 fpByte[13] = endByte[22]; 
 fpByte[14] = endByte[62]; 
 fpByte[15] = endByte[30]; 
 fpByte[16] = endByte[37]; 
 fpByte[17] = endByte[ 5]; 
 fpByte[18] = endByte[45]; 
 fpByte[19] = endByte[13]; 
 fpByte[20] = endByte[53]; 
 fpByte[21] = endByte[21]; 
 fpByte[22] = endByte[61]; 
 fpByte[23] = endByte[29]; 
 fpByte[24] = endByte[36]; 
 fpByte[25] = endByte[ 4]; 
 fpByte[26] = endByte[44]; 
 fpByte[27] = endByte[12]; 
 fpByte[28] = endByte[52]; 
 fpByte[29] = endByte[20]; 
 fpByte[30] = endByte[60]; 
 fpByte[31] = endByte[28]; 
 fpByte[32] = endByte[35]; 
 fpByte[33] = endByte[ 3]; 
 fpByte[34] = endByte[43]; 
 fpByte[35] = endByte[11]; 
 fpByte[36] = endByte[51]; 
 fpByte[37] = endByte[19]; 
 fpByte[38] = endByte[59]; 
 fpByte[39] = endByte[27]; 
 fpByte[40] = endByte[34]; 
 fpByte[41] = endByte[ 2]; 
 fpByte[42] = endByte[42]; 
 fpByte[43] = endByte[10]; 
 fpByte[44] = endByte[50]; 
 fpByte[45] = endByte[18]; 
 fpByte[46] = endByte[58]; 
 fpByte[47] = endByte[26]; 
 fpByte[48] = endByte[33]; 
 fpByte[49] = endByte[ 1]; 
 fpByte[50] = endByte[41]; 
 fpByte[51] = endByte[ 9]; 
 fpByte[52] = endByte[49]; 
 fpByte[53] = endByte[17]; 
 fpByte[54] = endByte[57]; 
 fpByte[55] = endByte[25]; 
 fpByte[56] = endByte[32]; 
 fpByte[57] = endByte[ 0]; 
 fpByte[58] = endByte[40]; 
 fpByte[59] = endByte[ 8]; 
 fpByte[60] = endByte[48]; 
 fpByte[61] = endByte[16]; 
 fpByte[62] = endByte[56]; 
 fpByte[63] = endByte[24];
 return fpByte;
}

function getBoxBinary(i) {
 var binary = "";
 switch (i) {
   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 10 :binary = "1010";break;
   case 11 :binary = "1011";break;
   case 12 :binary = "1100";break;
   case 13 :binary = "1101";break;
   case 14 :binary = "1110";break;
   case 15 :binary = "1111";break;
 }
 return binary;
}
/*
* generate 16 keys for xor
*
*/
function generateKeys(keyByte){    
 var key   = new Array(56);
 var keys = new Array();  
 
 keys[ 0] = new Array();
 keys[ 1] = new Array();
 keys[ 2] = new Array();
 keys[ 3] = new Array();
 keys[ 4] = new Array();
 keys[ 5] = new Array();
 keys[ 6] = new Array();
 keys[ 7] = new Array();
 keys[ 8] = new Array();
 keys[ 9] = new Array();
 keys[10] = new Array();
 keys[11] = new Array();
 keys[12] = new Array();
 keys[13] = new Array();
 keys[14] = new Array();
 keys[15] = new Array();  
 var loop = [1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1];

 for(i=0;i<7;i++){
   for(j=0,k=7;j<8;j++,k--){
     key[i*8+j]=keyByte[8*k+i];
   }
 }    
 
 var i = 0;
 for(i = 0;i < 16;i ++){
   var tempLeft=0;
   var tempRight=0;
   for(j = 0; j < loop[i];j ++){          
     tempLeft = key[0];
     tempRight = key[28];
     for(k = 0;k < 27 ;k ++){
       key[k] = key[k+1];
       key[28+k] = key[29+k];
     }  
     key[27]=tempLeft;
     key[55]=tempRight;
   }
   var tempKey = new Array(48);
   tempKey[ 0] = key[13];
   tempKey[ 1] = key[16];
   tempKey[ 2] = key[10];
   tempKey[ 3] = key[23];
   tempKey[ 4] = key[ 0];
   tempKey[ 5] = key[ 4];
   tempKey[ 6] = key[ 2];
   tempKey[ 7] = key[27];
   tempKey[ 8] = key[14];
   tempKey[ 9] = key[ 5];
   tempKey[10] = key[20];
   tempKey[11] = key[ 9];
   tempKey[12] = key[22];
   tempKey[13] = key[18];
   tempKey[14] = key[11];
   tempKey[15] = key[ 3];
   tempKey[16] = key[25];
   tempKey[17] = key[ 7];
   tempKey[18] = key[15];
   tempKey[19] = key[ 6];
   tempKey[20] = key[26];
   tempKey[21] = key[19];
   tempKey[22] = key[12];
   tempKey[23] = key[ 1];
   tempKey[24] = key[40];
   tempKey[25] = key[51];
   tempKey[26] = key[30];
   tempKey[27] = key[36];
   tempKey[28] = key[46];
   tempKey[29] = key[54];
   tempKey[30] = key[29];
   tempKey[31] = key[39];
   tempKey[32] = key[50];
   tempKey[33] = key[44];
   tempKey[34] = key[32];
   tempKey[35] = key[47];
   tempKey[36] = key[43];
   tempKey[37] = key[48];
   tempKey[38] = key[38];
   tempKey[39] = key[55];
   tempKey[40] = key[33];
   tempKey[41] = key[52];
   tempKey[42] = key[45];
   tempKey[43] = key[41];
   tempKey[44] = key[49];
   tempKey[45] = key[35];
   tempKey[46] = key[28];
   tempKey[47] = key[31];
   switch(i){
     case 0: for(m=0;m < 48 ;m++){ keys[ 0][m] = tempKey[m]; } break;
     case 1: for(m=0;m < 48 ;m++){ keys[ 1][m] = tempKey[m]; } break;
     case 2: for(m=0;m < 48 ;m++){ keys[ 2][m] = tempKey[m]; } break;
     case 3: for(m=0;m < 48 ;m++){ keys[ 3][m] = tempKey[m]; } break;
     case 4: for(m=0;m < 48 ;m++){ keys[ 4][m] = tempKey[m]; } break;
     case 5: for(m=0;m < 48 ;m++){ keys[ 5][m] = tempKey[m]; } break;
     case 6: for(m=0;m < 48 ;m++){ keys[ 6][m] = tempKey[m]; } break;
     case 7: for(m=0;m < 48 ;m++){ keys[ 7][m] = tempKey[m]; } break;
     case 8: for(m=0;m < 48 ;m++){ keys[ 8][m] = tempKey[m]; } break;
     case 9: for(m=0;m < 48 ;m++){ keys[ 9][m] = tempKey[m]; } break;
     case 10: for(m=0;m < 48 ;m++){ keys[10][m] = tempKey[m]; } break;
     case 11: for(m=0;m < 48 ;m++){ keys[11][m] = tempKey[m]; } break;
     case 12: for(m=0;m < 48 ;m++){ keys[12][m] = tempKey[m]; } break;
     case 13: for(m=0;m < 48 ;m++){ keys[13][m] = tempKey[m]; } break;
     case 14: for(m=0;m < 48 ;m++){ keys[14][m] = tempKey[m]; } break;
     case 15: for(m=0;m < 48 ;m++){ keys[15][m] = tempKey[m]; } break;
   }
 }
 return keys;  
}
//end-------------------------------------------------------------------------------------------------------------
/*
function test() {
 
 var msg = "abcdefgh";
 var bt = strToBt(msg);
 
 var key = "12345678";
 var keyB = strToBt(key);
   
 var encByte = enc(bt,keyB);
     
 var enchex  = bt64ToHex(encByte);  
 endata.value=enchex;
 
 var encStr = hexToBt64(enchex);
 alert("encStr="+encStr);
 var eByte = new Array();
 for(m=0;m<encStr.length;m++){
   eByte[m] = parseInt(encStr.substring(m,m+1));
 }
 var decbyte= dec(eByte,keyB)
 var decmsg= byteToString(decbyte);
 alert("decbyte="+decbyte);
 alert("decmsg="+decmsg);  
}*/

 2、java文件(des.java)

package com.zz.test;

import java.util.ArrayList;
import java.util.List;

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 = "admin";
        String str = desObj.strEnc(data, key1, key2, key3);
        System.out.println(str);
        String dec = desObj.strDec(str, key1, key2, key3);
        System.out.println(dec);
    }

    /**
     * DES加密/解密
     * 
     * @Copyright Copyright (c) 2006
     * @author Guapo
     * @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)
     * 
     * return the bit(it's length = 4)
     */
    public String hexToBt4(String hex) {
        String binary = "";
        if (hex.equalsIgnoreCase("0")) {
            binary = "0000";
        } else if (hex.equalsIgnoreCase("1")) {
            binary = "0001";
        }
        if (hex.equalsIgnoreCase("2")) {
            binary = "0010";
        }
        if (hex.equalsIgnoreCase("3")) {
            binary = "0011";
        }
        if (hex.equalsIgnoreCase("4")) {
            binary = "0100";
        }
        if (hex.equalsIgnoreCase("5")) {
            binary = "0101";
        }
        if (hex.equalsIgnoreCase("6")) {
            binary = "0110";
        }
        if (hex.equalsIgnoreCase("7")) {
            binary = "0111";
        }
        if (hex.equalsIgnoreCase("8")) {
            binary = "1000";
        }
        if (hex.equalsIgnoreCase("9")) {
            binary = "1001";
        }
        if (hex.equalsIgnoreCase("A")) {
            binary = "1010";
        }
        if (hex.equalsIgnoreCase("B")) {
            binary = "1011";
        }
        if (hex.equalsIgnoreCase("C")) {
            binary = "1100";
        }
        if (hex.equalsIgnoreCase("D")) {
            binary = "1101";
        }
        if (hex.equalsIgnoreCase("E")) {
            binary = "1110";
        }
        if (hex.equalsIgnoreCase("F")) {
            binary = "1111";
        }
        return binary;
    }

    /*
     * chang the bit(it's length = 64) into the string
     * 
     * return string
     */
    public String byteToString(int[] byteData) {
        String str = "";
        for (int i = 0; i < 4; i++) {
            int count = 0;
            for (int j = 0; j < 16; j++) {
                int pow = 1;
                for (int m = 15; m > j; m--) {
                    pow *= 2;
                }
                count += byteData[16 * i + j] * pow;
            }
            if (count != 0) {
                str += "" + (char) (count);
            }
        }
        return str;
    }

    public String bt64ToHex(int[] byteData) {
        String hex = "";
        for (int i = 0; i < 16; i++) {
            String bt = "";
            for (int j = 0; j < 4; j++) {
                bt += byteData[i * 4 + j];
            }
            hex += bt4ToHex(bt);
        }
        return hex;
    }

    public String hexToBt64(String hex) {
        String binary = "";
        for (int i = 0; i < 16; i++) {
            binary += hexToBt4(hex.substring(i, i + 1));
        }
        return binary;
    }

    /*
     * the 64 bit des core arithmetic
     */

    public int[] enc(int[] dataByte, int[] keyByte) {
        int[][] keys = generateKeys(keyByte);
        int[] ipByte = initPermute(dataByte);
        int[] ipLeft = new int[32];
        int[] ipRight = new int[32];
        int[] tempLeft = new int[32];
        int i = 0, j = 0, k = 0, m = 0, n = 0;
        for (k = 0; k < 32; k++) {
            ipLeft[k] = ipByte[k];
            ipRight[k] = ipByte[32 + k];
        }
        for (i = 0; i < 16; i++) {
            for (j = 0; j < 32; j++) {
                tempLeft[j] = ipLeft[j];
                ipLeft[j] = ipRight[j];
            }
            int[] key = new int[48];
            for (m = 0; m < 48; m++) {
                key[m] = keys[i][m];
            }
            int[] tempRight = xor(pPermute(sBoxPermute(xor(
                    expandPermute(ipRight), key))), tempLeft);
            for (n = 0; n < 32; n++) {
                ipRight[n] = tempRight[n];
            }

        }

        int[] finalData = new int[64];
        for (i = 0; i < 32; i++) {
            finalData[i] = ipRight[i];
            finalData[32 + i] = ipLeft[i];
        }
        return finallyPermute(finalData);
    }

    public int[] dec(int[] dataByte, int[] keyByte) {
        int[][] keys = generateKeys(keyByte);
        int[] ipByte = initPermute(dataByte);
        int[] ipLeft = new int[32];
        int[] ipRight = new int[32];
        int[] tempLeft = new int[32];
        int i = 0, j = 0, k = 0, m = 0, n = 0;
        for (k = 0; k < 32; k++) {
            ipLeft[k] = ipByte[k];
            ipRight[k] = ipByte[32 + k];
        }
        for (i = 15; i >= 0; i--) {
            for (j = 0; j < 32; j++) {
                tempLeft[j] = ipLeft[j];
                ipLeft[j] = ipRight[j];
            }
            int[] key = new int[48];
            for (m = 0; m < 48; m++) {
                key[m] = keys[i][m];
            }

            int[] tempRight = xor(pPermute(sBoxPermute(xor(
                    expandPermute(ipRight), key))), tempLeft);
            for (n = 0; n < 32; n++) {
                ipRight[n] = tempRight[n];
            }
        }

        int[] finalData = new int[64];
        for (i = 0; i < 32; i++) {
            finalData[i] = ipRight[i];
            finalData[32 + i] = ipLeft[i];
        }
        return finallyPermute(finalData);
    }

    public int[] initPermute(int[] originalData) {
        int[] ipByte = new int[64];
        int i = 0, m = 1, n = 0, j, k;
        for (i = 0, m = 1, n = 0; i < 4; i++, m += 2, n += 2) {
            for (j = 7, k = 0; j >= 0; j--, k++) {
                ipByte[i * 8 + k] = originalData[j * 8 + m];
                ipByte[i * 8 + k + 32] = originalData[j * 8 + n];
            }
        }
        return ipByte;
    }

    public int[] expandPermute(int[] rightData) {
        int[] epByte = new int[48];
        int i, j;
        for (i = 0; i < 8; i++) {
            if (i == 0) {
                epByte[i * 6 + 0] = rightData[31];
            } else {
                epByte[i * 6 + 0] = rightData[i * 4 - 1];
            }
            epByte[i * 6 + 1] = rightData[i * 4 + 0];
            epByte[i * 6 + 2] = rightData[i * 4 + 1];
            epByte[i * 6 + 3] = rightData[i * 4 + 2];
            epByte[i * 6 + 4] = rightData[i * 4 + 3];
            if (i == 7) {
                epByte[i * 6 + 5] = rightData[0];
            } else {
                epByte[i * 6 + 5] = rightData[i * 4 + 4];
            }
        }
        return epByte;
    }

    public int[] xor(int[] byteOne, int[] byteTwo) {
        // var xorByte = new Array(byteOne.length);
        // for(int i = 0;i < byteOne.length; i ++){
        // xorByte[i] = byteOne[i] ^ byteTwo[i];
        // }
        // return xorByte;
        int[] xorByte = new int[byteOne.length];
        for (int i = 0; i < byteOne.length; i++) {
            xorByte[i] = byteOne[i] ^ byteTwo[i];
        }
        return xorByte;
    }

    public int[] sBoxPermute(int[] expandByte) {

        // var sBoxByte = new Array(32);
        int[] sBoxByte = new int[32];
        String binary = "";
        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 } };

        /* Table - s2 */
        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 } };

        /* Table - s3 */
        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 } };
        /* Table - s4 */
        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 },
                { 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 } };

        /* Table - s5 */
        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 } };

        /* Table - s6 */
        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 } };

        /* Table - s7 */
        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 } };

        /* Table - s8 */
        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 } };

        for (int m = 0; m < 8; m++) {
            int i = 0, j = 0;
            i = expandByte[m * 6 + 0] * 2 + expandByte[m * 6 + 5];
            j = expandByte[m * 6 + 1] * 2 * 2 * 2 + expandByte[m * 6 + 2] * 2
                    * 2 + expandByte[m * 6 + 3] * 2 + expandByte[m * 6 + 4];
            switch (m) {
            case 0:
                binary = getBoxBinary(s1[i][j]);
                break;
            case 1:
                binary = getBoxBinary(s2[i][j]);
                break;
            case 2:
                binary = getBoxBinary(s3[i][j]);
                break;
            case 3:
                binary = getBoxBinary(s4[i][j]);
                break;
            case 4:
                binary = getBoxBinary(s5[i][j]);
                break;
            case 5:
                binary = getBoxBinary(s6[i][j]);
                break;
            case 6:
                binary = getBoxBinary(s7[i][j]);
                break;
            case 7:
                binary = getBoxBinary(s8[i][j]);
                break;
            }
            sBoxByte[m * 4 + 0] = Integer.parseInt(binary.substring(0, 1));
            sBoxByte[m * 4 + 1] = Integer.parseInt(binary.substring(1, 2));
            sBoxByte[m * 4 + 2] = Integer.parseInt(binary.substring(2, 3));
            sBoxByte[m * 4 + 3] = Integer.parseInt(binary.substring(3, 4));
        }
        return sBoxByte;
    }

    public int[] pPermute(int[] sBoxByte) {
        int[] pBoxPermute = new int[32];
        pBoxPermute[0] = sBoxByte[15];
        pBoxPermute[1] = sBoxByte[6];
        pBoxPermute[2] = sBoxByte[19];
        pBoxPermute[3] = sBoxByte[20];
        pBoxPermute[4] = sBoxByte[28];
        pBoxPermute[5] = sBoxByte[11];
        pBoxPermute[6] = sBoxByte[27];
        pBoxPermute[7] = sBoxByte[16];
        pBoxPermute[8] = sBoxByte[0];
        pBoxPermute[9] = sBoxByte[14];
        pBoxPermute[10] = sBoxByte[22];
        pBoxPermute[11] = sBoxByte[25];
        pBoxPermute[12] = sBoxByte[4];
        pBoxPermute[13] = sBoxByte[17];
        pBoxPermute[14] = sBoxByte[30];
        pBoxPermute[15] = sBoxByte[9];
        pBoxPermute[16] = sBoxByte[1];
        pBoxPermute[17] = sBoxByte[7];
        pBoxPermute[18] = sBoxByte[23];
        pBoxPermute[19] = sBoxByte[13];
        pBoxPermute[20] = sBoxByte[31];
        pBoxPermute[21] = sBoxByte[26];
        pBoxPermute[22] = sBoxByte[2];
        pBoxPermute[23] = sBoxByte[8];
        pBoxPermute[24] = sBoxByte[18];
        pBoxPermute[25] = sBoxByte[12];
        pBoxPermute[26] = sBoxByte[29];
        pBoxPermute[27] = sBoxByte[5];
        pBoxPermute[28] = sBoxByte[21];
        pBoxPermute[29] = sBoxByte[10];
        pBoxPermute[30] = sBoxByte[3];
        pBoxPermute[31] = sBoxByte[24];
        return pBoxPermute;
    }

    public int[] finallyPermute(int[] endByte) {
        int[] fpByte = new int[64];
        fpByte[0] = endByte[39];
        fpByte[1] = endByte[7];
        fpByte[2] = endByte[47];
        fpByte[3] = endByte[15];
        fpByte[4] = endByte[55];
        fpByte[5] = endByte[23];
        fpByte[6] = endByte[63];
        fpByte[7] = endByte[31];
        fpByte[8] = endByte[38];
        fpByte[9] = endByte[6];
        fpByte[10] = endByte[46];
        fpByte[11] = endByte[14];
        fpByte[12] = endByte[54];
        fpByte[13] = endByte[22];
        fpByte[14] = endByte[62];
        fpByte[15] = endByte[30];
        fpByte[16] = endByte[37];
        fpByte[17] = endByte[5];
        fpByte[18] = endByte[45];
        fpByte[19] = endByte[13];
        fpByte[20] = endByte[53];
        fpByte[21] = endByte[21];
        fpByte[22] = endByte[61];
        fpByte[23] = endByte[29];
        fpByte[24] = endByte[36];
        fpByte[25] = endByte[4];
        fpByte[26] = endByte[44];
        fpByte[27] = endByte[12];
        fpByte[28] = endByte[52];
        fpByte[29] = endByte[20];
        fpByte[30] = endByte[60];
        fpByte[31] = endByte[28];
        fpByte[32] = endByte[35];
        fpByte[33] = endByte[3];
        fpByte[34] = endByte[43];
        fpByte[35] = endByte[11];
        fpByte[36] = endByte[51];
        fpByte[37] = endByte[19];
        fpByte[38] = endByte[59];
        fpByte[39] = endByte[27];
        fpByte[40] = endByte[34];
        fpByte[41] = endByte[2];
        fpByte[42] = endByte[42];
        fpByte[43] = endByte[10];
        fpByte[44] = endByte[50];
        fpByte[45] = endByte[18];
        fpByte[46] = endByte[58];
        fpByte[47] = endByte[26];
        fpByte[48] = endByte[33];
        fpByte[49] = endByte[1];
        fpByte[50] = endByte[41];
        fpByte[51] = endByte[9];
        fpByte[52] = endByte[49];
        fpByte[53] = endByte[17];
        fpByte[54] = endByte[57];
        fpByte[55] = endByte[25];
        fpByte[56] = endByte[32];
        fpByte[57] = endByte[0];
        fpByte[58] = endByte[40];
        fpByte[59] = endByte[8];
        fpByte[60] = endByte[48];
        fpByte[61] = endByte[16];
        fpByte[62] = endByte[56];
        fpByte[63] = endByte[24];
        return fpByte;
    }

    public String getBoxBinary(int i) {
        String binary = "";
        switch (i) {
        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 10:
            binary = "1010";
            break;
        case 11:
            binary = "1011";
            break;
        case 12:
            binary = "1100";
            break;
        case 13:
            binary = "1101";
            break;
        case 14:
            binary = "1110";
            break;
        case 15:
            binary = "1111";
            break;
        }
        return binary;
    }

    /*
     * generate 16 keys for xor
     * 
     */
    public int[][] generateKeys(int[] keyByte) {
        int[] key = new int[56];
        int[][] keys = new int[16][48];

        // keys[ 0] = new Array();
        // keys[ 1] = new Array();
        // keys[ 2] = new Array();
        // keys[ 3] = new Array();
        // keys[ 4] = new Array();
        // keys[ 5] = new Array();
        // keys[ 6] = new Array();
        // keys[ 7] = new Array();
        // keys[ 8] = new Array();
        // keys[ 9] = new Array();
        // keys[10] = new Array();
        // keys[11] = new Array();
        // keys[12] = new Array();
        // keys[13] = new Array();
        // keys[14] = new Array();
        // keys[15] = new Array();
        int[] loop = new int[] { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 };

        for (int i = 0; i < 7; i++) {
            for (int j = 0, k = 7; j < 8; j++, k--) {
                key[i * 8 + j] = keyByte[8 * k + i];
            }
        }

        int i = 0;
        for (i = 0; i < 16; i++) {
            int tempLeft = 0;
            int tempRight = 0;
            for (int j = 0; j < loop[i]; j++) {
                tempLeft = key[0];
                tempRight = key[28];
                for (int k = 0; k < 27; k++) {
                    key[k] = key[k + 1];
                    key[28 + k] = key[29 + k];
                }
                key[27] = tempLeft;
                key[55] = tempRight;
            }
            // var tempKey = new Array(48);
            int[] tempKey = new int[48];
            tempKey[0] = key[13];
            tempKey[1] = key[16];
            tempKey[2] = key[10];
            tempKey[3] = key[23];
            tempKey[4] = key[0];
            tempKey[5] = key[4];
            tempKey[6] = key[2];
            tempKey[7] = key[27];
            tempKey[8] = key[14];
            tempKey[9] = key[5];
            tempKey[10] = key[20];
            tempKey[11] = key[9];
            tempKey[12] = key[22];
            tempKey[13] = key[18];
            tempKey[14] = key[11];
            tempKey[15] = key[3];
            tempKey[16] = key[25];
            tempKey[17] = key[7];
            tempKey[18] = key[15];
            tempKey[19] = key[6];
            tempKey[20] = key[26];
            tempKey[21] = key[19];
            tempKey[22] = key[12];
            tempKey[23] = key[1];
            tempKey[24] = key[40];
            tempKey[25] = key[51];
            tempKey[26] = key[30];
            tempKey[27] = key[36];
            tempKey[28] = key[46];
            tempKey[29] = key[54];
            tempKey[30] = key[29];
            tempKey[31] = key[39];
            tempKey[32] = key[50];
            tempKey[33] = key[44];
            tempKey[34] = key[32];
            tempKey[35] = key[47];
            tempKey[36] = key[43];
            tempKey[37] = key[48];
            tempKey[38] = key[38];
            tempKey[39] = key[55];
            tempKey[40] = key[33];
            tempKey[41] = key[52];
            tempKey[42] = key[45];
            tempKey[43] = key[41];
            tempKey[44] = key[49];
            tempKey[45] = key[35];
            tempKey[46] = key[28];
            tempKey[47] = key[31];
            int m;
            switch (i) {
            case 0:
                for (m = 0; m < 48; m++) {
                    keys[0][m] = tempKey[m];
                }
                break;
            case 1:
                for (m = 0; m < 48; m++) {
                    keys[1][m] = tempKey[m];
                }
                break;
            case 2:
                for (m = 0; m < 48; m++) {
                    keys[2][m] = tempKey[m];
                }
                break;
            case 3:
                for (m = 0; m < 48; m++) {
                    keys[3][m] = tempKey[m];
                }
                break;
            case 4:
                for (m = 0; m < 48; m++) {
                    keys[4][m] = tempKey[m];
                }
                break;
            case 5:
                for (m = 0; m < 48; m++) {
                    keys[5][m] = tempKey[m];
                }
                break;
            case 6:
                for (m = 0; m < 48; m++) {
                    keys[6][m] = tempKey[m];
                }
                break;
            case 7:
                for (m = 0; m < 48; m++) {
                    keys[7][m] = tempKey[m];
                }
                break;
            case 8:
                for (m = 0; m < 48; m++) {
                    keys[8][m] = tempKey[m];
                }
                break;
            case 9:
                for (m = 0; m < 48; m++) {
                    keys[9][m] = tempKey[m];
                }
                break;
            case 10:
                for (m = 0; m < 48; m++) {
                    keys[10][m] = tempKey[m];
                }
                break;
            case 11:
                for (m = 0; m < 48; m++) {
                    keys[11][m] = tempKey[m];
                }
                break;
            case 12:
                for (m = 0; m < 48; m++) {
                    keys[12][m] = tempKey[m];
                }
                break;
            case 13:
                for (m = 0; m < 48; m++) {
                    keys[13][m] = tempKey[m];
                }
                break;
            case 14:
                for (m = 0; m < 48; m++) {
                    keys[14][m] = tempKey[m];
                }
                break;
            case 15:
                for (m = 0; m < 48; m++) {
                    keys[15][m] = tempKey[m];
                }
                break;
            }
        }
        return keys;
    }
}