aHR0cCUzQS8vd3d3LmNlYnB1YnNlcnZpY2UuY29tL2N0cHNwX2lpc3Mvc2VhcmNoYnVzaW5lc3N0eXBlYmVmb3JlZG9vcmFjdGlvbi9nZXRTZWFyY2guZG8=
F12打开控制台
发现有3条链接，看一下他们都返回了什么东西。
发现第3条返回了我们想要的数据
看一下他的请求参数
发现是个post请求
有一堆cookie，不知道有没有影响
我们测试一下
把cookie去掉，再请求一次
发现并没有影响
所以不用去关注cookie
我们看下post里面的数据
searchName是我们要搜索的关键字
pageNo是开始的页数
row是一页显示的数据
我们带上时间再请求一次
发现时间段的查询是bulletIssnTimeStart和bulletinIssnTimeStop
再看一下返回的数据都有什么
表格里面的数据右边都会有
其实有一个数据它没有
就是跳到详情页的链接这里没有
我们点击下面这里，是会跳转到详情页的
里面会有详细信息
但是返回的内容里并没有链接呀
我们先点一下箭头，再点一下左边表格的内容
发现我们点击的时候他会调用showDetails方法
我们全局搜索大法搜索一下
明显这个就是函数的定义
我们点进去
可以看到
里面进行了一个post请求，请求成功后生成一个表单，然后提交，再把表单提交，这时才会跳转。
第一次是没有上传数据的，第二次才上传数据。
这里为什么会进行两次请求呢？
在这纠结了好久
后来问了同事才知道
第一次请求是判断你是否是跨域请求
不是才会跳转页面
所以第一次请求对我们来说完全是没有必要的，把它去掉
第二次请求的url是
第二次请求的参数是
第二次请求后跳到的详情页的落地页（第一条链）是没有详细信息的
那他很有可能就是xhr返回json数据后渲染的
我们继续往下找,发现这条链里面有详细的数据
看他的请求参数
发现和我们前面的参数是差不多的。
schemaVersion,businessObjectName在第上一页是有对应的值的
businessKeyWord的值是固定的
我们要找的是tenderProjectCode和businessId.
明显这两个值是加密过的
我们回到这个页面
全局搜索一下tenderProjectCode
明显后面那几个有showDetails，明显就是这几个
点进去看看
可以发现调用了strEnc，而且有两次，说明我们的两个加密都是通过这个方法的。
我们看一下strEnc的参数
稍微找一下就发现了
strEnc函数全局搜索一下也发现了
把代码扣一扣就差不多了
python代码
import requests
import json
import execjs
import time
# 执行本地的js
def getJsCode():
f = open("test.js", 'r', encoding='UTF-8')
line = f.readline()
htmlstr = ''
while line:
htmlstr = htmlstr + line
line = f.readline()
return htmlstr
def crawl(searchName,startTime,endTime):
url = 'http://www.cebpubservice.com/ctpsp_iiss/searchbusinesstypebeforedooraction/getStringMethod.do'
header = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36',
}
pageNo = 1
crawlList = []
while True:
try:
data = {
'searchName': searchName,
'searchArea': '',
'searchIndustry': '',
'centerPlat': '',
'businessType': '招标公告',
'searchTimeStart': '',
'searchTimeStop': '',
'timeTypeParam': '',
'bulletinIssnTime': '',
'bulletinIssnTimeStart':startTime ,
'bulletinIssnTimeStop': endTime,
'pageNo': pageNo,
'row': 15,
}
r = requests.post(url, headers=header, data=data)
if r.text.find("频繁访问") != -1:
break
refer = r.url
r = json.loads(r.text)
if r.get("success") == True:
object = r.get("object")
returnlist = object.get("returnlist")
for returnData in returnlist:
dataDict = {}
businessObjectName = returnData.get("businessObjectName") # 招标项目名称
if businessObjectName is None:
businessObjectName = "--"
industriesType = returnData.get("industriesType")
if industriesType is None:
industriesType = "--"
transactionPlatfName = returnData.get("transactionPlatfName") # 招标平台/单位
if transactionPlatfName is None:
transactionPlatfName = "--"
regionName = returnData.get("regionName") # 所属区域
if regionName is None:
regionName = "--"
receiveTime = returnData.get("receiveTime") # 发布时间
if receiveTime is None:
receiveTime = "--"
bulletinEndTime = returnData.get("bulletinEndTime") # 结束时间
if bulletinEndTime is None:
bulletinEndTime = "--"
tenderProjectCode = returnData.get("tenderProjectCode")
transactionPlatfCode = returnData.get("transactionPlatfCode")
schemaVersion = returnData.get("schemaVersion")
businessId = returnData.get("businessId")
dataDict["businessObjectName"] = businessObjectName
dataDict["industriesType"] = industriesType
if industriesType is None:
dataDict["industriesType"] = "--"
dataDict["regionName"] = regionName
dataDict["transactionPlatfName"] = transactionPlatfName
dataDict["receiveTime"] = receiveTime
dataDict["bulletinEndTime"] = bulletinEndTime
tenderProjectCode = ctx.call('strEnc',tenderProjectCode,ctx.call('CurentTime'),"cebpubservice","iiss")
businessId = ctx.call('strEnc',businessId,ctx.call('CurentTime'),"cebpubservice","iiss")
# 详情页数据
url = "http://www.cebpubservice.com/ctpsp_iiss/SecondaryAction/findDetails.do"
data = {
'schemaVersion': schemaVersion,
'businessKeyWord': 'tenderProject',
'tenderProjectCode': tenderProjectCode,
'businessObjectName': businessObjectName,
'businessId': businessId
}
r = requests.post(url, headers=header, data=data)
dataDict["details"] = r.text
crawlList.append(dataDict)
page = object.get("page")
totalPage = page.get("totalPage")
pageNo = page.get("pageNo")
if pageNo >= totalPage:
break
pageNo = pageNo + 1
else:
print(r.text)
except Exception as e:
print(e)
return crawlList
if __name__=='__main__':
# 读取js文件
js_content = getJsCode()
# 编译js文件
ctx = execjs.compile(js_content)
crawlList = crawl("互联网","2020-05-05","2020-05-10")
for c in crawlList:
print(c)
js文件
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;
}
function CurentTime() {
var now = new Date();
var year = now.getFullYear(); //年
var month = now.getMonth() + 1; //月
var day = now.getDate(); //日
var hh = now.getHours(); //时
var mm = now.getMinutes(); //分
var ss = now.getSeconds();
if(ss > 30){
if(mm == 59){
hh = hh + 1;
mm = 0;
}else{
mm = mm + 1;
}
}
var clock = year + "-";
if(month < 10)
clock += "0";
clock += month + "-";
if(day < 10)
clock += "0";
clock += day + " ";
if(hh < 10)
clock += "0";
clock += hh;
//clock += hh + ":";
//if (mm < 10) clock += '0';
//clock += mm;
return(clock);
}
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;
}
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;
}
运行结果
