/**
*@author liulang
*@date 09.4.19
*@paramete name_rule word1_word2_word3······
*@function name_rule word1Word2Word3······
*@main calculate cipherkey
**/
import java.io.*;
public class CalculateCipherKey{
private int perm_select_one[] = {
57, 49, 41, 33, 25, 17, 9, 1, 58, 50,
42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
27, 19, 11, 3, 60, 52, 44, 36, 63, 55,
47, 39, 31, 23, 15, 7, 62, 54, 46, 38,
30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
13, 5, 28, 20, 12, 4
};
private int perm_select_two[] = {
14, 17, 11, 24, 1, 5, 3, 28, 15, 6,
21, 10, 23, 19, 12, 4, 26, 8, 16, 7,
27, 20, 13, 2, 41, 52, 31, 37, 47, 55,
30, 40, 51, 45, 33, 48, 44, 49, 39, 56,
34, 53, 46, 42, 50, 36, 29, 32
};
//保存密钥
static String k[] = new String[16];
//暂存左移时的前28bit，即C
private static String str_c = new String();
//暂存左移时的后28bit，即D
private static String str_d = new String();
//初始密钥的二进制形式
private static String str_key = new String();
//输入的初始密钥
private static String key = new String();
//输入密钥并转换成二进制形式
public void inputKey() throws IOException {
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
System.out.print("please enter 16 numbers of the hexadecimal key:");
key=stdin.readLine();
str_key=hexToBinary(key);
System.out.println("cipherkey:"+str_key);
}
//将字符串从十六进制转换成二进制
public String hexToBinary(String s){
String s1=new String();//中间变量
StringBuffer buf=new StringBuffer();
for(int i =0; i<s.length(); i++){
char c= s.charAt(i);
switch(c){
case '0': s1 = "0000"; break;
case '1': s1 = "0001"; break;
case '2': s1 = "0010"; break;
case '3': s1 = "0011"; break;
case '4': s1 = "0100"; break;
case '5': s1 = "0101"; break;
case '6': s1 = "0110"; break;
case '7': s1 = "0111"; break;
case '8': s1 = "1000"; break;
case '9': s1 = "1001"; break;
case 'a': s1 = "1010"; break;
case 'b': s1 = "1011"; break;
case 'c': s1 = "1100"; break;
case 'd': s1 = "1101"; break;
case 'e': s1 = "1110"; break;
case 'f': s1 = "1111"; break;
default: break;
}
buf = buf.append(s1);
}
return buf.toString();//从Stringbuffer 转换成String
}
//循环左移n位
public String rotl(String s, int n){
String s1 = s.substring(0,n);
String s2 = s.substring(n);
return s2+s1;
}
//置换选择1，并将其分成C0和D0
public void permSelectOne(String s){
char c[] = new char[56];
StringBuffer buf = new StringBuffer();
for(int i=0; i<56; i++)
c[i]=s.charAt(perm_select_one[i] - 1);//代表C0
for(int i=0; i<28; i++)
str_c=buf.append(c[i]).toString();//代表D0
buf.delete(0, buf.length());//删除buf里面的值
for(int i = 28; i<56; i++)
str_d = buf.append(c[i]).toString();
System.out.println("cd[0]: "+str_c+str_d);
}
//置换选择2
public char[] permSelectTwo(String s){
char c[]=new char[48];
for(int i=0; i<48; i++)
c[i]=s.charAt(perm_select_two[i] - 1);
return c;
}
//计算k[i]的值
public void calculateKey() throws IOException {
inputKey();
permSelectOne(str_key);
for(int i=1; i<=16; i++){
if(i==1||i==2 ||i==9||i==16){
str_c=rotl(str_c, 1);
str_d=rotl(str_d, 1);
}
else{
str_c=rotl(str_c, 2);
str_d=rotl(str_d, 2);
}
k[i-1] = new String(permSelectTwo(str_c+str_d));
System.out.println("cd["+i+"]: "+str_c+str_d);
System.out.println("k["+i+"]: "+k[i-1]);
}
}
public static void main(String[] args) throws IOException {
CalculateCipherKey ck=new CalculateCipherKey();
ck.calculateKey();
}
}
/**
*@des encryption or decryption
*@extends Calculate cipherkey
**/
import java.io.*;
public class DoDes extends CalculateCipherKey {
//ip initial permutation
private final int[] ip_perm ={
58, 50, 42, 34, 26, 18, 10, 2,
60, 52, 44, 36, 28, 20, 12, 4,
62, 54, 46, 38, 30, 22, 14, 6,
64, 56, 48, 40, 32, 24, 16, 8,
57, 49, 41, 33, 25, 17, 9, 1,
59, 51, 43, 35, 27, 19, 11, 3,
61, 53, 45, 37, 29, 21, 13, 5,
63, 55, 47, 39, 31, 23, 15, 7 };
// ip inverse initial permutation
private final int[] ip_reverse_perm={
40, 8, 48, 16, 56, 24, 64, 32,
39, 7, 47, 15, 55, 23, 63, 31,
38, 6, 46, 14, 54, 22, 62, 30,
37, 5, 45, 13, 53, 21, 61, 29,
36, 4, 44, 12, 52, 20, 60, 28,
35, 3, 43, 11, 51, 19, 59, 27,
34, 2, 42, 10, 50, 18, 58, 26,
33, 1, 41, 9, 49, 17, 57, 25 };
// per-round expansion
private final int[] e_perm={
32, 1, 2, 3, 4, 5,
4, 5, 6, 7, 8, 9,
8, 9, 10, 11, 12, 13,
12, 13, 14, 15, 16, 17,
16, 17, 18, 19, 20, 21,
20, 21, 22, 23, 24, 25,
24, 25, 26, 27, 28, 29,
28, 29, 30, 31, 32, 1 };
// per-round permutation
private final int[] p_perm ={
16, 7, 20, 21, 29, 12, 28, 17,
1, 15, 23, 26, 5, 18, 31, 10,
2, 8, 24, 14, 32, 27, 3, 9,
19, 13, 30, 6, 22, 11, 4, 25};
//s boxs
private final int[][] s={{
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 },
{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 },
{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 },
{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 },
{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 },
{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 },
{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 },
{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 }};
//保存明文或密文
private String text=new String();
//初始文件的二进制形式
private String str_text=new String();
private String[] str_l=new Str
