DES加密的JS文件，如何解密

liu2220

有上有一份DES加密字符串的JS源码。字符串加密成功后想进行解密，就是找不到解密的函数。
希望高手帮忙看下，源码中有没有带解密的函数，要如何调用。
附上JS文件
DES内容.txt (22.71 KB, 下载次数: 10)

2021-8-25 15:38 上传

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DES加密源码

lao3

deString('') 解密

1. function enString(data){
   
2. var key1 = "YHXWWLKJYXGS";
   
3. var key2 = "ZFCHHYXFL10C";
   
4. var key3 = "DES";
   
5. var enchex = strEnc(data,key1,key2,key3);
   
6. return enchex;
   
7. }
   
8. function deString(data){
   
9. var key1 = "YHXWWLKJYXGS";
   
10. var key2 = "ZFCHHYXFL10C";
    
11. var key3 = "DES";
    
12. var enchex = strDec(data,key1,key2,key3);
    
13. return enchex;
    
14. }
    
15. /*
    
16. * encrypt the string to string made up of hex
    
17. * return the encrypted string
    
18. */
    
19. function strEnc(data,firstKey,secondKey,thirdKey){
    
20. 
    
21. var leng = data.length;
    
22. var encData = "";
    
23. var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength;
    
24. if(firstKey != null && firstKey != ""){   
    
25.    firstKeyBt = getKeyBytes(firstKey);
    
26.    firstLength = firstKeyBt.length;
    
27. }
    
28. if(secondKey != null && secondKey != ""){
    
29.    secondKeyBt = getKeyBytes(secondKey);
    
30.    secondLength = secondKeyBt.length;
    
31. }
    
32. if(thirdKey != null && thirdKey != ""){
    
33.    thirdKeyBt = getKeyBytes(thirdKey);
    
34.    thirdLength = thirdKeyBt.length;
    
35. }  
    
36. 
    
37. if(leng > 0){
    
38.    if(leng < 4){
    
39.      var bt = strToBt(data);      
    
40.      var encByte ;
    
41.      if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){
    
42.        var tempBt;
    
43.        var x,y,z;
    
44.        tempBt = bt;        
    
45.        for(x = 0;x < firstLength ;x ++){
    
46.          tempBt = enc(tempBt,firstKeyBt[x]);
    
47.        }
    
48.        for(y = 0;y < secondLength ;y ++){
    
49.          tempBt = enc(tempBt,secondKeyBt[y]);
    
50.        }
    
51.        for(z = 0;z < thirdLength ;z ++){
    
52.          tempBt = enc(tempBt,thirdKeyBt[z]);
    
53.        }        
    
54.        encByte = tempBt;        
    
55.      }else{
    
56.        if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){
    
57.          var tempBt;
    
58.          var x,y;
    
59.          tempBt = bt;
    
60.          for(x = 0;x < firstLength ;x ++){
    
61.            tempBt = enc(tempBt,firstKeyBt[x]);
    
62.          }
    
63.          for(y = 0;y < secondLength ;y ++){
    
64.            tempBt = enc(tempBt,secondKeyBt[y]);
    
65.          }
    
66.          encByte = tempBt;
    
67.        }else{
    
68.          if(firstKey != null && firstKey !=""){            
    
69.            var tempBt;
    
70.            var x = 0;
    
71.            tempBt = bt;            
    
72.            for(x = 0;x < firstLength ;x ++){
    
73.              tempBt = enc(tempBt,firstKeyBt[x]);
    
74.            }
    
75.            encByte = tempBt;
    
76.          }
    
77.        }        
    
78.      }
    
79.      encData = bt64ToHex(encByte);
    
80.    }else{
    
81.      var iterator = parseInt(leng/4);
    
82.      var remainder = leng%4;
    
83.      var i=0;      
    
84.      for(i = 0;i < iterator;i++){
    
85.        var tempData = data.substring(i*4+0,i*4+4);
    
86.        var tempByte = strToBt(tempData);
    
87.        var encByte ;
    
88.        if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){
    
89.          var tempBt;
    
90.          var x,y,z;
    
91.          tempBt = tempByte;
    
92.          for(x = 0;x < firstLength ;x ++){
    
93.            tempBt = enc(tempBt,firstKeyBt[x]);
    
94.          }
    
95.          for(y = 0;y < secondLength ;y ++){
    
96.            tempBt = enc(tempBt,secondKeyBt[y]);
    
97.          }
    
98.          for(z = 0;z < thirdLength ;z ++){
    
99.            tempBt = enc(tempBt,thirdKeyBt[z]);
    
100.          }
     
101.          encByte = tempBt;
     
102.        }else{
     
103.          if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){
     
104.            var tempBt;
     
105.            var x,y;
     
106.            tempBt = tempByte;
     
107.            for(x = 0;x < firstLength ;x ++){
     
108.              tempBt = enc(tempBt,firstKeyBt[x]);
     
109.            }
     
110.            for(y = 0;y < secondLength ;y ++){
     
111.              tempBt = enc(tempBt,secondKeyBt[y]);
     
112.            }
     
113.            encByte = tempBt;
     
114.          }else{
     
115.            if(firstKey != null && firstKey !=""){                     
     
116.              var tempBt;
     
117.              var x;
     
118.              tempBt = tempByte;
     
119.              for(x = 0;x < firstLength ;x ++){               
     
120.                tempBt = enc(tempBt,firstKeyBt[x]);
     
121.              }
     
122.              encByte = tempBt;              
     
123.            }
     
124.          }
     
125.        }
     
126.        encData += bt64ToHex(encByte);
     
127.      }      
     
128.      if(remainder > 0){
     
129.        var remainderData = data.substring(iterator*4+0,leng);
     
130.        var tempByte = strToBt(remainderData);
     
131.        var encByte ;
     
132.        if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){
     
133.          var tempBt;
     
134.          var x,y,z;
     
135.          tempBt = tempByte;
     
136.          for(x = 0;x < firstLength ;x ++){
     
137.            tempBt = enc(tempBt,firstKeyBt[x]);
     
138.          }
     
139.          for(y = 0;y < secondLength ;y ++){
     
140.            tempBt = enc(tempBt,secondKeyBt[y]);
     
141.          }
     
142.          for(z = 0;z < thirdLength ;z ++){
     
143.            tempBt = enc(tempBt,thirdKeyBt[z]);
     
144.          }
     
145.          encByte = tempBt;
     
146.        }else{
     
147.          if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){
     
148.            var tempBt;
     
149.            var x,y;
     
150.            tempBt = tempByte;
     
151.            for(x = 0;x < firstLength ;x ++){
     
152.              tempBt = enc(tempBt,firstKeyBt[x]);
     
153.            }
     
154.            for(y = 0;y < secondLength ;y ++){
     
155.              tempBt = enc(tempBt,secondKeyBt[y]);
     
156.            }
     
157.            encByte = tempBt;
     
158.          }else{
     
159.            if(firstKey != null && firstKey !=""){            
     
160.              var tempBt;
     
161.              var x;
     
162.              tempBt = tempByte;
     
163.              for(x = 0;x < firstLength ;x ++){
     
164.                tempBt = enc(tempBt,firstKeyBt[x]);
     
165.              }
     
166.              encByte = tempBt;
     
167.            }
     
168.          }
     
169.        }
     
170.        encData += bt64ToHex(encByte);
     
171.      }               
     
172.    }
     
173. }
     
174. return encData;
     
175. }
     
176. 
     
177. /*
     
178. * decrypt the encrypted string to the original string
     
179. *
     
180. * return  the original string  
     
181. */
     
182. function strDec(data,firstKey,secondKey,thirdKey){
     
183. var leng = data.length;
     
184. var decStr = "";
     
185. var firstKeyBt,secondKeyBt,thirdKeyBt,firstLength,secondLength,thirdLength;
     
186. if(firstKey != null && firstKey != ""){   
     
187.    firstKeyBt = getKeyBytes(firstKey);
     
188.    firstLength = firstKeyBt.length;
     
189. }
     
190. if(secondKey != null && secondKey != ""){
     
191.    secondKeyBt = getKeyBytes(secondKey);
     
192.    secondLength = secondKeyBt.length;
     
193. }
     
194. if(thirdKey != null && thirdKey != ""){
     
195.    thirdKeyBt = getKeyBytes(thirdKey);
     
196.    thirdLength = thirdKeyBt.length;
     
197. }
     
198. 
     
199. var iterator = parseInt(leng/16);
     
200. var i=0;  
     
201. for(i = 0;i < iterator;i++){
     
202.    var tempData = data.substring(i*16+0,i*16+16);   
     
203.    var strByte = hexToBt64(tempData);   
     
204.    var intByte = new Array(64);
     
205.    var j = 0;
     
206.    for(j = 0;j < 64; j++){
     
207.      intByte[j] = parseInt(strByte.substring(j,j+1));
     
208.    }   
     
209.    var decByte;
     
210.    if(firstKey != null && firstKey !="" && secondKey != null && secondKey != "" && thirdKey != null && thirdKey != ""){
     
211.      var tempBt;
     
212.      var x,y,z;
     
213.      tempBt = intByte;
     
214.      for(x = thirdLength - 1;x >= 0;x --){
     
215.        tempBt = dec(tempBt,thirdKeyBt[x]);
     
216.      }
     
217.      for(y = secondLength - 1;y >= 0;y --){
     
218.        tempBt = dec(tempBt,secondKeyBt[y]);
     
219.      }
     
220.      for(z = firstLength - 1;z >= 0 ;z --){
     
221.        tempBt = dec(tempBt,firstKeyBt[z]);
     
222.      }
     
223.      decByte = tempBt;
     
224.    }else{
     
225.      if(firstKey != null && firstKey !="" && secondKey != null && secondKey != ""){
     
226.        var tempBt;
     
227.        var x,y,z;
     
228.        tempBt = intByte;
     
229.        for(x = secondLength - 1;x >= 0 ;x --){
     
230.          tempBt = dec(tempBt,secondKeyBt[x]);
     
231.        }
     
232.        for(y = firstLength - 1;y >= 0 ;y --){
     
233.          tempBt = dec(tempBt,firstKeyBt[y]);
     
234.        }
     
235.        decByte = tempBt;
     
236.      }else{
     
237.        if(firstKey != null && firstKey !=""){
     
238.          var tempBt;
     
239.          var x,y,z;
     
240.          tempBt = intByte;
     
241.          for(x = firstLength - 1;x >= 0 ;x --){
     
242.            tempBt = dec(tempBt,firstKeyBt[x]);
     
243.          }
     
244.          decByte = tempBt;
     
245.        }
     
246.      }
     
247.    }
     
248.    decStr += byteToString(decByte);
     
249. }      
     
250. return decStr;
     
251. }
     
252. /*
     
253. * chang the string into the bit array
     
254. *
     
255. * return bit array(it's length % 64 = 0)
     
256. */
     
257. function getKeyBytes(key){
     
258. var keyBytes = new Array();
     
259. var leng = key.length;
     
260. var iterator = parseInt(leng/4);
     
261. var remainder = leng%4;
     
262. var i = 0;
     
263. for(i = 0;i < iterator; i ++){
     
264.    keyBytes[i] = strToBt(key.substring(i*4+0,i*4+4));
     
265. }
     
266. if(remainder > 0){
     
267.    keyBytes[i] = strToBt(key.substring(i*4+0,leng));
     
268. }   
     
269. return keyBytes;
     
270. }
     
271. 
     
272. /*
     
273. * chang the string(it's length <= 4) into the bit array
     
274. *
     
275. * return bit array(it's length = 64)
     
276. */
     
277. function strToBt(str){  
     
278. var leng = str.length;
     
279. var bt = new Array(64);
     
280. if(leng < 4){
     
281.    var i=0,j=0,p=0,q=0;
     
282.    for(i = 0;i<leng;i++){
     
283.      var k = str.charCodeAt(i);
     
284.      for(j=0;j<16;j++){      
     
285.        var pow=1,m=0;
     
286.        for(m=15;m>j;m--){
     
287.          pow *= 2;
     
288.        }        
     
289.        bt[16*i+j]=parseInt(k/pow)%2;
     
290.      }
     
291.    }
     
292.    for(p = leng;p<4;p++){
     
293.      var k = 0;
     
294.      for(q=0;q<16;q++){      
     
295.        var pow=1,m=0;
     
296.        for(m=15;m>q;m--){
     
297.          pow *= 2;
     
298.        }        
     
299.        bt[16*p+q]=parseInt(k/pow)%2;
     
300.      }
     
301.    }  
     
302. }else{
     
303.    for(i = 0;i<4;i++){
     
304.      var k = str.charCodeAt(i);
     
305.      for(j=0;j<16;j++){      
     
306.        var pow=1;
     
307.        for(m=15;m>j;m--){
     
308.          pow *= 2;
     
309.        }        
     
310.        bt[16*i+j]=parseInt(k/pow)%2;
     
311.      }
     
312.    }  
     
313. }
     
314. return bt;
     
315. }
     
316. 
     
317. /*
     
318. * chang the bit(it's length = 4) into the hex
     
319. *
     
320. * return hex
     
321. */
     
322. function bt4ToHex(binary) {
     
323. var hex;
     
324. switch (binary) {
     
325.    case "0000" : hex = "0"; break;
     
326.    case "0001" : hex = "1"; break;
     
327.    case "0010" : hex = "2"; break;
     
328.    case "0011" : hex = "3"; break;
     
329.    case "0100" : hex = "4"; break;
     
330.    case "0101" : hex = "5"; break;
     
331.    case "0110" : hex = "6"; break;
     
332.    case "0111" : hex = "7"; break;
     
333.    case "1000" : hex = "8"; break;
     
334.    case "1001" : hex = "9"; break;
     
335.    case "1010" : hex = "A"; break;
     
336.    case "1011" : hex = "B"; break;
     
337.    case "1100" : hex = "C"; break;
     
338.    case "1101" : hex = "D"; break;
     
339.    case "1110" : hex = "E"; break;
     
340.    case "1111" : hex = "F"; break;
     
341. }
     
342. return hex;
     
343. }
     
344. 
     
345. /*
     
346. * chang the hex into the bit(it's length = 4)
     
347. *
     
348. * return the bit(it's length = 4)
     
349. */
     
350. function hexToBt4(hex) {
     
351. var binary;
     
352. switch (hex) {
     
353.    case "0" : binary = "0000"; break;
     
354.    case "1" : binary = "0001"; break;
     
355.    case "2" : binary = "0010"; break;
     
356.    case "3" : binary = "0011"; break;
     
357.    case "4" : binary = "0100"; break;
     
358.    case "5" : binary = "0101"; break;
     
359.    case "6" : binary = "0110"; break;
     
360.    case "7" : binary = "0111"; break;
     
361.    case "8" : binary = "1000"; break;
     
362.    case "9" : binary = "1001"; break;
     
363.    case "A" : binary = "1010"; break;
     
364.    case "B" : binary = "1011"; break;
     
365.    case "C" : binary = "1100"; break;
     
366.    case "D" : binary = "1101"; break;
     
367.    case "E" : binary = "1110"; break;
     
368.    case "F" : binary = "1111"; break;
     
369. }
     
370. return binary;
     
371. }
     
372. 
     
373. /*
     
374. * chang the bit(it's length = 64) into the string
     
375. *
     
376. * return string
     
377. */
     
378. function byteToString(byteData){
     
379. var str="";
     
380. for(i = 0;i<4;i++){
     
381.    var count=0;
     
382.    for(j=0;j<16;j++){        
     
383.      var pow=1;
     
384.      for(m=15;m>j;m--){
     
385.        pow*=2;
     
386.      }              
     
387.      count+=byteData[16*i+j]*pow;
     
388.    }        
     
389.    if(count != 0){
     
390.      str+=String.fromCharCode(count);
     
391.    }
     
392. }
     
393. return str;
     
394. }
     
395. 
     
396. function bt64ToHex(byteData){
     
397. var hex = "";
     
398. for(i = 0;i<16;i++){
     
399.    var bt = "";
     
400.    for(j=0;j<4;j++){   
     
401.      bt += byteData[i*4+j];
     
402.    }   
     
403.    hex+=bt4ToHex(bt);
     
404. }
     
405. return hex;
     
406. }
     
407. 
     
408. function hexToBt64(hex){
     
409. var binary = "";
     
410. for(i = 0;i<16;i++){
     
411.    binary+=hexToBt4(hex.substring(i,i+1));
     
412. }
     
413. return binary;
     
414. }
     
415. 
     
416. /*
     
417. * the 64 bit des core arithmetic
     
418. */
     
419. 
     
420. function enc(dataByte,keyByte){  
     
421. var keys = generateKeys(keyByte);   
     
422. var ipByte   = initPermute(dataByte);  
     
423. var ipLeft   = new Array(32);
     
424. var ipRight  = new Array(32);
     
425. var tempLeft = new Array(32);
     
426. var i = 0,j = 0,k = 0,m = 0, n = 0;
     
427. for(k = 0;k < 32;k ++){
     
428.    ipLeft[k] = ipByte[k];
     
429.    ipRight[k] = ipByte[32+k];
     
430. }   
     
431. for(i = 0;i < 16;i ++){
     
432.    for(j = 0;j < 32;j ++){
     
433.      tempLeft[j] = ipLeft[j];
     
434.      ipLeft[j] = ipRight[j];      
     
435.    }  
     
436.    var key = new Array(48);
     
437.    for(m = 0;m < 48;m ++){
     
438.      key[m] = keys[i][m];
     
439.    }
     
440.    var  tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);      
     
441.    for(n = 0;n < 32;n ++){
     
442.      ipRight[n] = tempRight[n];
     
443.    }  
     
444.    
     
445. }  
     
446. 
     
447. 
     
448. var finalData =new Array(64);
     
449. for(i = 0;i < 32;i ++){
     
450.    finalData[i] = ipRight[i];
     
451.    finalData[32+i] = ipLeft[i];
     
452. }
     
453. return finallyPermute(finalData);  
     
454. }
     
455. 
     
456. function dec(dataByte,keyByte){  
     
457. var keys = generateKeys(keyByte);   
     
458. var ipByte   = initPermute(dataByte);  
     
459. var ipLeft   = new Array(32);
     
460. var ipRight  = new Array(32);
     
461. var tempLeft = new Array(32);
     
462. var i = 0,j = 0,k = 0,m = 0, n = 0;
     
463. for(k = 0;k < 32;k ++){
     
464.    ipLeft[k] = ipByte[k];
     
465.    ipRight[k] = ipByte[32+k];
     
466. }  
     
467. for(i = 15;i >= 0;i --){
     
468.    for(j = 0;j < 32;j ++){
     
469.      tempLeft[j] = ipLeft[j];
     
470.      ipLeft[j] = ipRight[j];      
     
471.    }  
     
472.    var key = new Array(48);
     
473.    for(m = 0;m < 48;m ++){
     
474.      key[m] = keys[i][m];
     
475.    }
     
476.    
     
477.    var  tempRight = xor(pPermute(sBoxPermute(xor(expandPermute(ipRight),key))), tempLeft);      
     
478.    for(n = 0;n < 32;n ++){
     
479.      ipRight[n] = tempRight[n];
     
480.    }  
     
481. }  
     
482. 
     
483. 
     
484. var finalData =new Array(64);
     
485. for(i = 0;i < 32;i ++){
     
486.    finalData[i] = ipRight[i];
     
487.    finalData[32+i] = ipLeft[i];
     
488. }
     
489. return finallyPermute(finalData);  
     
490. }
     
491. 
     
492. function initPermute(originalData){
     
493. var ipByte = new Array(64);
     
494. for (i = 0, m = 1, n = 0; i < 4; i++, m += 2, n += 2) {
     
495.    for (j = 7, k = 0; j >= 0; j--, k++) {
     
496.      ipByte[i * 8 + k] = originalData[j * 8 + m];
     
497.      ipByte[i * 8 + k + 32] = originalData[j * 8 + n];
     
498.    }
     
499. }   
     
500. return ipByte;
     
501. }
     
502. 
     
503. function expandPermute(rightData){  
     
504. var epByte = new Array(48);
     
505. for (i = 0; i < 8; i++) {
     
506.    if (i == 0) {
     
507.      epByte[i * 6 + 0] = rightData[31];
     
508.    } else {
     
509.      epByte[i * 6 + 0] = rightData[i * 4 - 1];
     
510.    }
     
511.    epByte[i * 6 + 1] = rightData[i * 4 + 0];
     
512.    epByte[i * 6 + 2] = rightData[i * 4 + 1];
     
513.    epByte[i * 6 + 3] = rightData[i * 4 + 2];
     
514.    epByte[i * 6 + 4] = rightData[i * 4 + 3];
     
515.    if (i == 7) {
     
516.      epByte[i * 6 + 5] = rightData[0];
     
517.    } else {
     
518.      epByte[i * 6 + 5] = rightData[i * 4 + 4];
     
519.    }
     
520. }      
     
521. return epByte;
     
522. }
     
523. 
     
524. function xor(byteOne,byteTwo){  
     
525. var xorByte = new Array(byteOne.length);
     
526. for(i = 0;i < byteOne.length; i ++){      
     
527.    xorByte[i] = byteOne[i] ^ byteTwo[i];
     
528. }  
     
529. return xorByte;
     
530. }
     
531. 
     
532. function sBoxPermute(expandByte){
     
533. 
     
534.    var sBoxByte = new Array(32);
     
535.    var binary = "";
     
536.    var s1 = [
     
537.        [14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7],
     
538.        [0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8],
     
539.        [4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0],
     
540.        [15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 ]];
     
541. 
     
542.        /* Table - s2 */
     
543.    var s2 = [
     
544.        [15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10],
     
545.        [3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5],
     
546.        [0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15],
     
547.        [13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 ]];
     
548. 
     
549.        /* Table - s3 */
     
550.    var s3= [
     
551.        [10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8],
     
552.        [13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1],
     
553.        [13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7],
     
554.        [1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 ]];
     
555.        /* Table - s4 */
     
556.    var s4 = [
     
557.        [7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15],
     
558.        [13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9],
     
559.        [10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4],
     
560.        [3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 ]];
     
561. 
     
562.        /* Table - s5 */
     
563.    var s5 = [
     
564.        [2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9],
     
565.        [14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6],
     
566.        [4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14],
     
567.        [11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 ]];
     
568. 
     
569.        /* Table - s6 */
     
570.    var s6 = [
     
571.        [12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11],
     
572.        [10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8],
     
573.        [9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6],
     
574.        [4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 ]];
     
575. 
     
576.        /* Table - s7 */
     
577.    var s7 = [
     
578.        [4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1],
     
579.        [13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6],
     
580.        [1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2],
     
581.        [6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12]];
     
582. 
     
583.        /* Table - s8 */
     
584.    var s8 = [
     
585.        [13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7],
     
586.        [1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2],
     
587.        [7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8],
     
588.        [2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11]];
     
589.    
     
590.    for(m=0;m<8;m++){
     
591.    var i=0,j=0;
     
592.    i = expandByte[m*6+0]*2+expandByte[m*6+5];
     
593.    j = expandByte[m * 6 + 1] * 2 * 2 * 2
     
594.      + expandByte[m * 6 + 2] * 2* 2
     
595.      + expandByte[m * 6 + 3] * 2
     
596.      + expandByte[m * 6 + 4];
     
597.    switch (m) {
     
598.      case 0 :
     
599.        binary = getBoxBinary(s1[i][j]);
     
600.        break;
     
601.      case 1 :
     
602.        binary = getBoxBinary(s2[i][j]);
     
603.        break;
     
604.      case 2 :
     
605.        binary = getBoxBinary(s3[i][j]);
     
606.        break;
     
607.      case 3 :
     
608.        binary = getBoxBinary(s4[i][j]);
     
609.        break;
     
610.      case 4 :
     
611.        binary = getBoxBinary(s5[i][j]);
     
612.        break;
     
613.      case 5 :
     
614.        binary = getBoxBinary(s6[i][j]);
     
615.        break;
     
616.      case 6 :
     
617.        binary = getBoxBinary(s7[i][j]);
     
618.        break;
     
619.      case 7 :
     
620.        binary = getBoxBinary(s8[i][j]);
     
621.        break;
     
622.    }      
     
623.    sBoxByte[m*4+0] = parseInt(binary.substring(0,1));
     
624.    sBoxByte[m*4+1] = parseInt(binary.substring(1,2));
     
625.    sBoxByte[m*4+2] = parseInt(binary.substring(2,3));
     
626.    sBoxByte[m*4+3] = parseInt(binary.substring(3,4));
     
627. }
     
628. return sBoxByte;
     
629. }
     
630. 
     
631. function pPermute(sBoxByte){
     
632. var pBoxPermute = new Array(32);
     
633. pBoxPermute[ 0] = sBoxByte[15];
     
634. pBoxPermute[ 1] = sBoxByte[ 6];
     
635. pBoxPermute[ 2] = sBoxByte[19];
     
636. pBoxPermute[ 3] = sBoxByte[20];
     
637. pBoxPermute[ 4] = sBoxByte[28];
     
638. pBoxPermute[ 5] = sBoxByte[11];
     
639. pBoxPermute[ 6] = sBoxByte[27];
     
640. pBoxPermute[ 7] = sBoxByte[16];
     
641. pBoxPermute[ 8] = sBoxByte[ 0];
     
642. pBoxPermute[ 9] = sBoxByte[14];
     
643. pBoxPermute[10] = sBoxByte[22];
     
644. pBoxPermute[11] = sBoxByte[25];
     
645. pBoxPermute[12] = sBoxByte[ 4];
     
646. pBoxPermute[13] = sBoxByte[17];
     
647. pBoxPermute[14] = sBoxByte[30];
     
648. pBoxPermute[15] = sBoxByte[ 9];
     
649. pBoxPermute[16] = sBoxByte[ 1];
     
650. pBoxPermute[17] = sBoxByte[ 7];
     
651. pBoxPermute[18] = sBoxByte[23];
     
652. pBoxPermute[19] = sBoxByte[13];
     
653. pBoxPermute[20] = sBoxByte[31];
     
654. pBoxPermute[21] = sBoxByte[26];
     
655. pBoxPermute[22] = sBoxByte[ 2];
     
656. pBoxPermute[23] = sBoxByte[ 8];
     
657. pBoxPermute[24] = sBoxByte[18];
     
658. pBoxPermute[25] = sBoxByte[12];
     
659. pBoxPermute[26] = sBoxByte[29];
     
660. pBoxPermute[27] = sBoxByte[ 5];
     
661. pBoxPermute[28] = sBoxByte[21];
     
662. pBoxPermute[29] = sBoxByte[10];
     
663. pBoxPermute[30] = sBoxByte[ 3];
     
664. pBoxPermute[31] = sBoxByte[24];   
     
665. return pBoxPermute;
     
666. }
     
667. 
     
668. function finallyPermute(endByte){   
     
669. var fpByte = new Array(64);  
     
670. fpByte[ 0] = endByte[39];
     
671. fpByte[ 1] = endByte[ 7];
     
672. fpByte[ 2] = endByte[47];
     
673. fpByte[ 3] = endByte[15];
     
674. fpByte[ 4] = endByte[55];
     
675. fpByte[ 5] = endByte[23];
     
676. fpByte[ 6] = endByte[63];
     
677. fpByte[ 7] = endByte[31];
     
678. fpByte[ 8] = endByte[38];
     
679. fpByte[ 9] = endByte[ 6];
     
680. fpByte[10] = endByte[46];
     
681. fpByte[11] = endByte[14];
     
682. fpByte[12] = endByte[54];
     
683. fpByte[13] = endByte[22];
     
684. fpByte[14] = endByte[62];
     
685. fpByte[15] = endByte[30];
     
686. fpByte[16] = endByte[37];
     
687. fpByte[17] = endByte[ 5];
     
688. fpByte[18] = endByte[45];
     
689. fpByte[19] = endByte[13];
     
690. fpByte[20] = endByte[53];
     
691. fpByte[21] = endByte[21];
     
692. fpByte[22] = endByte[61];
     
693. fpByte[23] = endByte[29];
     
694. fpByte[24] = endByte[36];
     
695. fpByte[25] = endByte[ 4];
     
696. fpByte[26] = endByte[44];
     
697. fpByte[27] = endByte[12];
     
698. fpByte[28] = endByte[52];
     
699. fpByte[29] = endByte[20];
     
700. fpByte[30] = endByte[60];
     
701. fpByte[31] = endByte[28];
     
702. fpByte[32] = endByte[35];
     
703. fpByte[33] = endByte[ 3];
     
704. fpByte[34] = endByte[43];
     
705. fpByte[35] = endByte[11];
     
706. fpByte[36] = endByte[51];
     
707. fpByte[37] = endByte[19];
     
708. fpByte[38] = endByte[59];
     
709. fpByte[39] = endByte[27];
     
710. fpByte[40] = endByte[34];
     
711. fpByte[41] = endByte[ 2];
     
712. fpByte[42] = endByte[42];
     
713. fpByte[43] = endByte[10];
     
714. fpByte[44] = endByte[50];
     
715. fpByte[45] = endByte[18];
     
716. fpByte[46] = endByte[58];
     
717. fpByte[47] = endByte[26];
     
718. fpByte[48] = endByte[33];
     
719. fpByte[49] = endByte[ 1];
     
720. fpByte[50] = endByte[41];
     
721. fpByte[51] = endByte[ 9];
     
722. fpByte[52] = endByte[49];
     
723. fpByte[53] = endByte[17];
     
724. fpByte[54] = endByte[57];
     
725. fpByte[55] = endByte[25];
     
726. fpByte[56] = endByte[32];
     
727. fpByte[57] = endByte[ 0];
     
728. fpByte[58] = endByte[40];
     
729. fpByte[59] = endByte[ 8];
     
730. fpByte[60] = endByte[48];
     
731. fpByte[61] = endByte[16];
     
732. fpByte[62] = endByte[56];
     
733. fpByte[63] = endByte[24];
     
734. return fpByte;
     
735. }
     
736. 
     
737. function getBoxBinary(i) {
     
738. var binary = "";
     
739. switch (i) {
     
740.    case 0 :binary = "0000";break;
     
741.    case 1 :binary = "0001";break;
     
742.    case 2 :binary = "0010";break;
     
743.    case 3 :binary = "0011";break;
     
744.    case 4 :binary = "0100";break;
     
745.    case 5 :binary = "0101";break;
     
746.    case 6 :binary = "0110";break;
     
747.    case 7 :binary = "0111";break;
     
748.    case 8 :binary = "1000";break;
     
749.    case 9 :binary = "1001";break;
     
750.    case 10 :binary = "1010";break;
     
751.    case 11 :binary = "1011";break;
     
752.    case 12 :binary = "1100";break;
     
753.    case 13 :binary = "1101";break;
     
754.    case 14 :binary = "1110";break;
     
755.    case 15 :binary = "1111";break;
     
756. }
     
757. return binary;
     
758. }
     
759. /*
     
760. * generate 16 keys for xor
     
761. *
     
762. */
     
763. function generateKeys(keyByte){   
     
764. var key   = new Array(56);
     
765. var keys = new Array();  
     
766. 
     
767. keys[ 0] = new Array();
     
768. keys[ 1] = new Array();
     
769. keys[ 2] = new Array();
     
770. keys[ 3] = new Array();
     
771. keys[ 4] = new Array();
     
772. keys[ 5] = new Array();
     
773. keys[ 6] = new Array();
     
774. keys[ 7] = new Array();
     
775. keys[ 8] = new Array();
     
776. keys[ 9] = new Array();
     
777. keys[10] = new Array();
     
778. keys[11] = new Array();
     
779. keys[12] = new Array();
     
780. keys[13] = new Array();
     
781. keys[14] = new Array();
     
782. keys[15] = new Array();  
     
783. var loop = [1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1];
     
784. 
     
785. for(i=0;i<7;i++){
     
786.    for(j=0,k=7;j<8;j++,k--){
     
787.      key[i*8+j]=keyByte[8*k+i];
     
788.    }
     
789. }   
     
790. 
     
791. var i = 0;
     
792. for(i = 0;i < 16;i ++){
     
793.    var tempLeft=0;
     
794.    var tempRight=0;
     
795.    for(j = 0; j < loop[i];j ++){         
     
796.      tempLeft = key[0];
     
797.      tempRight = key[28];
     
798.      for(k = 0;k < 27 ;k ++){
     
799.        key[k] = key[k+1];
     
800.        key[28+k] = key[29+k];
     
801.      }  
     
802.      key[27]=tempLeft;
     
803.      key[55]=tempRight;
     
804.    }
     
805.    var tempKey = new Array(48);
     
806.    tempKey[ 0] = key[13];
     
807.    tempKey[ 1] = key[16];
     
808.    tempKey[ 2] = key[10];
     
809.    tempKey[ 3] = key[23];
     
810.    tempKey[ 4] = key[ 0];
     
811.    tempKey[ 5] = key[ 4];
     
812.    tempKey[ 6] = key[ 2];
     
813.    tempKey[ 7] = key[27];
     
814.    tempKey[ 8] = key[14];
     
815.    tempKey[ 9] = key[ 5];
     
816.    tempKey[10] = key[20];
     
817.    tempKey[11] = key[ 9];
     
818.    tempKey[12] = key[22];
     
819.    tempKey[13] = key[18];
     
820.    tempKey[14] = key[11];
     
821.    tempKey[15] = key[ 3];
     
822.    tempKey[16] = key[25];
     
823.    tempKey[17] = key[ 7];
     
824.    tempKey[18] = key[15];
     
825.    tempKey[19] = key[ 6];
     
826.    tempKey[20] = key[26];
     
827.    tempKey[21] = key[19];
     
828.    tempKey[22] = key[12];
     
829.    tempKey[23] = key[ 1];
     
830.    tempKey[24] = key[40];
     
831.    tempKey[25] = key[51];
     
832.    tempKey[26] = key[30];
     
833.    tempKey[27] = key[36];
     
834.    tempKey[28] = key[46];
     
835.    tempKey[29] = key[54];
     
836.    tempKey[30] = key[29];
     
837.    tempKey[31] = key[39];
     
838.    tempKey[32] = key[50];
     
839.    tempKey[33] = key[44];
     
840.    tempKey[34] = key[32];
     
841.    tempKey[35] = key[47];
     
842.    tempKey[36] = key[43];
     
843.    tempKey[37] = key[48];
     
844.    tempKey[38] = key[38];
     
845.    tempKey[39] = key[55];
     
846.    tempKey[40] = key[33];
     
847.    tempKey[41] = key[52];
     
848.    tempKey[42] = key[45];
     
849.    tempKey[43] = key[41];
     
850.    tempKey[44] = key[49];
     
851.    tempKey[45] = key[35];
     
852.    tempKey[46] = key[28];
     
853.    tempKey[47] = key[31];
     
854.    switch(i){
     
855.      case 0: for(m=0;m < 48 ;m++){ keys[ 0][m] = tempKey[m]; } break;
     
856.      case 1: for(m=0;m < 48 ;m++){ keys[ 1][m] = tempKey[m]; } break;
     
857.      case 2: for(m=0;m < 48 ;m++){ keys[ 2][m] = tempKey[m]; } break;
     
858.      case 3: for(m=0;m < 48 ;m++){ keys[ 3][m] = tempKey[m]; } break;
     
859.      case 4: for(m=0;m < 48 ;m++){ keys[ 4][m] = tempKey[m]; } break;
     
860.      case 5: for(m=0;m < 48 ;m++){ keys[ 5][m] = tempKey[m]; } break;
     
861.      case 6: for(m=0;m < 48 ;m++){ keys[ 6][m] = tempKey[m]; } break;
     
862.      case 7: for(m=0;m < 48 ;m++){ keys[ 7][m] = tempKey[m]; } break;
     
863.      case 8: for(m=0;m < 48 ;m++){ keys[ 8][m] = tempKey[m]; } break;
     
864.      case 9: for(m=0;m < 48 ;m++){ keys[ 9][m] = tempKey[m]; } break;
     
865.      case 10: for(m=0;m < 48 ;m++){ keys[10][m] = tempKey[m]; } break;
     
866.      case 11: for(m=0;m < 48 ;m++){ keys[11][m] = tempKey[m]; } break;
     
867.      case 12: for(m=0;m < 48 ;m++){ keys[12][m] = tempKey[m]; } break;
     
868.      case 13: for(m=0;m < 48 ;m++){ keys[13][m] = tempKey[m]; } break;
     
869.      case 14: for(m=0;m < 48 ;m++){ keys[14][m] = tempKey[m]; } break;
     
870.      case 15: for(m=0;m < 48 ;m++){ keys[15][m] = tempKey[m]; } break;
     
871.    }
     
872. }
     
873. return keys;  
     
874. }

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