/*
Create by Jonathan H. and fullarray
*/
import java.util.Base64;
/*import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;*/
import java.io.*;
import java.util.*;
import java.nio.*;
public class DESImplementation {
/* Initial Permutation */
static final int[] IP = {
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
};
/* Inverse Initial Permutation */
static final int[] IIP = {
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
};
/* Expansion Permutation */
static final int[] E = {
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
};
/* Permutation Function */
static final int[] P = {
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-Boxes*/
static final 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
};
static final 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
};
static final 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
};
static final 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
};
static final 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
};
static final 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
};
static final 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
};
static final 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
};
/* Permuted Choice One */
static final int[] PC1 = {
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
};
/* Permuted Choice Two */
static final int[] PC2 = {
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
};
/* Schedule of Left Shifts */
static final int[] SHIFTS = {
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
public DESImplementation() {
}
private byte[] performXOR(byte[] one, byte[] two) {
byte[] result = new byte[one.length];
for (int i = 0 ; i < one.length ; i++) {
result[i] = (byte) (one[i] ^ two[i]);
}
return result;
}
private byte[] permute(byte[] input, int[] mapping) {
int byteCount = 1 + (mapping.length - 1) / 8;
byte[] output = new byte[byteCount];
int pos;
for (int i = 0 ; i < mapping.length ; i++) {
pos = mapping[i] - 1;
int value = getBitFromArray(input, pos);
setBitInArray(output, i, value);
}
return output;
}
private int getBitFromArray(byte[] array, int pos) {
int value;
int bytePos = pos / 8;
int bitPos = pos % 8;
value = (array[bytePos] >> (8 - (bitPos + 1))) & 0x0001;
/* eg: right shift selected byte 5 times to get 3rd bit
* (bitPos = 2) at rightmost position and
* then AND with 0x0001*/
return value;
}
private void setBitInArray(byte[] input, int pos, int value) {
int bytePos = pos / 8;
int bitPos = pos % 8;
byte old = input[bytePos];
old = (byte) (((0xFF7F >> bitPos) & old) & 0x00FF);
byte newByte = (byte) ((value << (8 - (bitPos + 1))) | old);
input[bytePos] = newByte;
}
private byte[] hexStringToByteArray(String string) {
int length = string.length();
int n = (int)Math.ceil((length + 1) / 2);
byte[] result = new byte[n];
for (int i = length - 1; i >= 0 ; i -= 2) {
if (i == 0) {
result[i / 2] = (byte) ((Character.digit('0', 16) << 4)
+ Character.digit(string.charAt(i), 16));
} else {
result[i / 2] = (byte) ((Character.digit(string.charAt(i - 1), 16) << 4)
+ Character.digit(string.charAt(i), 16));
}
}
return result;
}
private void printBytes(byte[] input) {
String str ="";
//byte[] bytes = input.getBytes();
//String s = new String(bytes);
for (int i = 0 ; i < input.length; i++) {
//System.out.print(byteToBits(input[i]) + " ");
str = byteToBits(input[i]);
System.out.print(binaryToInt(str) + " ");
}
System.out.println();
}
public static String bytesToAlphabeticString(byte[] bytes) {
CharBuffer cb = ByteBuffer.wrap(bytes).asCharBuffer();
return cb.toString();
}
public static int binaryToInt(String binary)
{
return Integer.parseInt(binary,2);
}
public static String bytesToHex(byte[] in) {
final StringBuilder builder = new StringBuilder();
for(byte b : in) {
builder.append(String.format("%02x", b));
}
return builder.toString();
}
public String experiment(String message){
//String text = "This is an example é";
//String originalString ="";
/*try {
byte[] byteText = text.getBytes("UTF-8");
originalString = new String(byteText , "UTF-8");
}catch (UnsupportedEncodingException e){
e.printStackTrace();
}
return originalString;
try{
byte[] dec = Base64.getEncoder().encode(text.getBytes());
byte[] decs = Base64.getDecoder().decode(dec);
String some = new String(decs, "ASCII");
originalString = some;
}catch(UnsupportedEncodingException e){
e.printStackTrace();
}
// Decode using utf-8
return originalString;*/
//String s = "0110100001100101011011000110110001101111";
//String str = "";
//Check to make sure that the message is all 1s and 0s.
for(int i = 0; i < message.length(); i++) {
if(message.charAt(i) != '1' && message.charAt(i) != '0') {
return null;
}
}
//If the message does not have a length that is a multiple of 8, we can't decrypt it
if(message.length() % 8 != 0) {
return null;
}
//Splits the string into 8 bit segments with spaces in between
String returnString = "";
String decrypt = "";
for(int i = 0; i < message.length() - 7; i += 8) {
decrypt += message.substring(i, i + 8) + " ";
}
//Creates a string array with bytes that represent each of the characters in the message
String[] bytes = decrypt.split(" ");
for(int i = 0; i < bytes.length; i++) {
//Decrypts each character and adds it to the string to get the original message
returnString += (char)Integer.parseInt(bytes[i], 2);
}
return returnString;
}
public static String int2str( String t ) {
/*
String input = t;
String output = "";
for(int i = 0; i <= input.length() - 8; i+=8)
{
int k = Integer.parseInt(input.substring(i, i+8), 2);
output += (char) k;
}
return output;*/
StringBuilder sb = new StringBuilder();
StringBuilder temp = new StringBuilder();
//49204c6f7665204a617661 split into two characters 49, 20, 4c...
for( int i=0; i