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FileReader_2.java
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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
import java.nio.charset.StandardCharsets;
public class FileReader_2 {
public static void main(String[] args) throws IOException {
File file = new File("/4th Year Sem 1/Thesis 2/Test/RPRK(Plaintext)_inp_128_hex.txt");
File file2 = new File("/4th Year Sem 1/Thesis 2/Test/RPRK(Key)_inp_128_bin.txt");
String result;
Scanner sc = new Scanner(file);
Scanner sc2 = new Scanner(file2);
int PlainTextBlockSize = 7813;
int TotalSample = 1000;
int AlgoKeySize = 128;
int AlgoPlainTextSize = 128;
// String result = "nabil akhmal";
String textInput = sc.nextLine();
String keyInput = sc2.nextLine();
// System.out.println(textInput.substring(i*AlgoKeySize, (i*AlgoKeySize)+128));
for(int j=0; j<TotalSample; j++) {
result = "";
String samplekey = keyInput.substring( j * AlgoKeySize, ( j * AlgoKeySize )+ AlgoKeySize );
int textformula = ( j * AlgoPlainTextSize / 4 ) * PlainTextBlockSize;
String sampletext = hexToBin(textInput.substring( textformula, textformula + (AlgoPlainTextSize * PlainTextBlockSize / 4)).toUpperCase());
for(int k=0; k<PlainTextBlockSize; k++) {
String inputkey = samplekey;
String inputtext = sampletext.substring( k * AlgoPlainTextSize, ( k * AlgoPlainTextSize ) + AlgoPlainTextSize);
byte[] enc = encrypt(inputtext.getBytes(), inputkey.getBytes());
//String s = new String(enc, StandardCharsets.UTF_8);
String x = hex(enc);
String binary = hextobinary(x.substring(0,32));
result += binary;
// ===== DEBUG PROCESS =====
// System.out.println("\nInput key : " + inputkey + "Length : " + "\n" + inputkey.length());
// System.out.println("\nInput text : " + inputtext + "Length : " + "\n" + inputtext.length());
// System.out.println("\nCiphertext (hex) : " + result);
// System.out.println("\nCiphertext (binary) : " + hextobinary(result));
// System.out.println("\nCiphertext length: " + hextobinary(result).length());
System.out.println("Sample : " + j + " Block : " + k);
}
FileWriter writer = new FileWriter("/4th Year Sem 1/Thesis 2/output_RPRK_"+ j +".txt");
writer.write(result);
writer.close();
}
}
public static String hextobinary(String input) {
String[]hex={"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
String[]binary={"0000","0001","0010","0011","0100","0101","0110","0111","1000","1001","1010","1011","1100","1101","1110","1111"};
String result = "";
for(int i=0;i<input.length();i++)
{
char temp=input.charAt(i);
String temp2=""+temp+"";
for(int j=0;j<hex.length;j++)
{
if(temp2.equalsIgnoreCase(hex[j]))
{
result=result+binary[j];
}
}
}
return result;
}
public static String hexToBin(String hex){
hex = hex.replaceAll("0", "0000");
hex = hex.replaceAll("1", "0001");
hex = hex.replaceAll("2", "0010");
hex = hex.replaceAll("3", "0011");
hex = hex.replaceAll("4", "0100");
hex = hex.replaceAll("5", "0101");
hex = hex.replaceAll("6", "0110");
hex = hex.replaceAll("7", "0111");
hex = hex.replaceAll("8", "1000");
hex = hex.replaceAll("9", "1001");
hex = hex.replaceAll("A", "1010");
hex = hex.replaceAll("B", "1011");
hex = hex.replaceAll("C", "1100");
hex = hex.replaceAll("D", "1101");
hex = hex.replaceAll("E", "1110");
hex = hex.replaceAll("F", "1111");
return hex;
}
public static String hex(byte[] bytes) {
StringBuilder result = new StringBuilder();
for (byte aByte : bytes) {
int decimal = (int) aByte & 0xff; // bytes widen to int, need mask, prevent sign extension
// get last 8 bits
String hex = Integer.toHexString(decimal);
if (hex.length() % 2 == 1) { // if half hex, pad with zero, e.g \t
hex = "0" + hex;
}
result.append(hex);
}
return result.toString();
}
public static String convertStringToBinary(String input) {
StringBuilder result = new StringBuilder();
char[] chars = input.toCharArray();
for (char aChar : chars) {
result.append(
String.format("%8s", Integer.toBinaryString(aChar)) // char -> int, auto-cast
.replaceAll(" ", "0") // zero pads
);
}
return result.toString();
}
private static int Nb, Nk, Nr; //Nb = number of words(byte) ; Nk = Number of keys; Nr = number of rounds
private static byte[][] w;
private static int[] sbox = { 0x71, 0xA4, 0x5A, 0x81, 0xF2, 0x8A, 0x17,
0xA1, 0xB6, 0x3E, 0x1D, 0x11, 0xD3, 0xE1, 0x0D, 0xFE, 0x9B, 0x90,
0xC2, 0xB0, 0x6E, 0xF5, 0xFB, 0xFA, 0xA5, 0x72, 0xB2, 0x50, 0x42,
0x3F, 0xF3, 0xAD, 0x68, 0x82, 0x1E, 0xAA, 0x0E, 0x2C, 0xEE, 0x05,
0xF9, 0x79, 0x95, 0xED, 0xE9, 0x2F, 0xFC, 0x21, 0xF1, 0x47, 0x4F,
0x7E, 0xA3, 0xC7, 0x8F, 0xAF, 0xC3, 0x43, 0xDC, 0xA0, 0xDD, 0xDA,
0xE2, 0xAB, 0xEF, 0x66, 0xA6, 0x0F, 0x39, 0x13, 0x36, 0x65, 0x53,
0x33, 0xBB, 0x07, 0x4C, 0x38, 0x9E, 0xEA, 0x9F, 0x09, 0xDF, 0x54,
0xA9, 0x7D, 0xE8, 0x70, 0x34, 0x8E, 0x85, 0xBA, 0x74, 0x6A, 0xFF,
0xA7, 0xEB, 0x28, 0x61, 0x20, 0x30, 0x35, 0xCF, 0x96, 0x57, 0x19,
0xBD, 0x9C, 0x08, 0x98, 0x92, 0x3D, 0x1B, 0x40, 0xDE, 0x8B, 0x5E,
0x22, 0x69, 0x55, 0x32, 0x27, 0x18, 0x73, 0x8C, 0x7F, 0xE6, 0xCD,
0xB8, 0x00, 0xD2, 0xBE, 0x1f, 0xa8, 0x78, 0xae, 0x5c, 0x84, 0x75,
0x10, 0x45, 0x64, 0x89, 0xD4, 0xD1, 0xE0, 0xD6, 0x02, 0x62, 0x16,
0xD0, 0x5F, 0x2D, 0x59, 0x58, 0x51, 0x41, 0x0C, 0x31, 0xAC, 0xCC,
0x76, 0xBF, 0x4D, 0xD9, 0x5D, 0xC8, 0x14, 0x2E, 0x6B, 0x44, 0x99,
0x15, 0x24, 0x2A, 0xC4, 0x67, 0xF7, 0x91, 0x01, 0x26, 0xB1, 0xF8,
0x97, 0x4E, 0x3B, 0xD7, 0x25, 0xB5, 0x6F, 0xF4, 0x6D, 0x86, 0x77,
0xB4, 0xCB, 0x83, 0x87, 0x88, 0x04, 0x23, 0x4B, 0x37, 0x1A, 0x3C,
0xB7, 0xE3, 0x4A, 0x89, 0x9A, 0x94, 0x0B, 0xD5, 0x3A, 0x63, 0x52,
0xC6, 0x06, 0x5B, 0x49, 0xBC, 0xE4, 0x6C, 0xF6, 0xF0, 0x7A, 0x03,
0x80, 0xC5, 0xC0, 0x46, 0x1C, 0xCE, 0xC9, 0x12, 0x8D, 0xC1, 0x93,
0xA2, 0xE7, 0x7C, 0x48, 0xFD, 0xD8, 0x60, 0x56, 0x0A, 0x2B, 0x7B,
0xEC, 0xCA, 0x9D, 0xB3, 0xE5, 0xDB, 0x29};
//rubic-cube s-box
private static int[] inv_sbox = { 0x81, 0xB3, 0x93, 0xE2, 0xC7, 0x27,
0xD9, 0x4B, 0x6C, 0x51, 0xF6, 0xD3, 0x9D, 0x0E, 0x24, 0x43, 0x8B,
0x0B, 0xEA, 0x45, 0xA7, 0xAC, 0x95, 0x06, 0x7A, 0x69, 0xCB, 0x70,
0xE7, 0x0A, 0x22, 0x84, 0x63, 0x2f, 0x75, 0xC8, 0xAD, 0xBB, 0xB4,
0x79, 0x61, 0xFF, 0xAE, 0xF7, 0x25, 0x98, 0xA8, 0x2D, 0x64, 0x9E,
0x78, 0x49, 0x58, 0x65, 0x46, 0xCA, 0x4D, 0x44, 0xD5, 0xB9, 0xCC,
0x6F, 0x09, 0x1D, 0x71, 0x9C, 0x1C, 0x39, 0xAA, 0x8C, 0xE6, 0x31,
0xF1, 0xDB, 0xCF, 0xC9, 0x4C, 0xA3, 0xB8, 0x32, 0x1B, 0x9B, 0xD7,
0x48, 0x53, 0x77, 0xF5, 0x68, 0x9A, 0x99, 0x02, 0xDA, 0x88, 0xA5,
0x74, 0x97, 0xF4, 0x62, 0x94, 0xD6, 0x8D, 0x47, 0x41, 0xB0, 0x20,
0x76, 0x5D, 0xA9, 0xDE, 0xBF, 0x14, 0xBD, 0x57, 0x00, 0x19, 0x7B,
0x5C, 0x8A, 0xA1, 0xC1, 0x86, 0x29, 0xE1, 0xF8, 0xF0, 0x55, 0x33,
0x7D, 0xE3, 0x03, 0x21, 0xC4, 0x89, 0x5A, 0xC0, 0xC5, 0xC6, 0x8E,
0x05, 0x73, 0x7C, 0xEB, 0x59, 0x36, 0x11, 0xB2, 0x6E, 0xED, 0xD2,
0x2A, 0x67, 0xB7, 0x6D, 0xAB, 0xD1, 0x10, 0x6B, 0xFB, 0x4E, 0x50,
0x3B, 0x07, 0xEE, 0x34, 0x01, 0x18, 0x42, 0x5F, 0x85, 0x54, 0x23,
0x3F, 0x9F, 0x1F, 0x87, 0x37, 0x13, 0xb5, 0x1a, 0xfc, 0xc2, 0xbc,
0x08, 0xCD, 0x80, 0xD0, 0x5B, 0x4A, 0xDC, 0x6A, 0x83, 0xA2, 0xE5,
0xEC, 0x12, 0x38, 0xAF, 0xE4, 0xD8, 0x35, 0xA6, 0xE9, 0xFA, 0xC3,
0xA0, 0x7F, 0xE8, 0x66, 0x96, 0x90, 0x82, 0x0C, 0x8F, 0xD4, 0x92,
0xBA, 0xF3, 0xA4, 0x3D, 0xFE, 0x3A, 0x3C, 0x72, 0x52, 0x91, 0x0D,
0x3E, 0xCE, 0xDD, 0xFD, 0x7E, 0xEF, 0x56, 0x2C, 0x4F, 0x60, 0xF9,
0x2B, 0x26, 0x40, 0xE0, 0x30, 0x04, 0x1E, 0xBE, 0x15, 0xDF, 0xB1,
0xB6, 0x28, 0x17, 0x16, 0x2E, 0xF2, 0x0F, 0x5E};
// private static int[] sbox = { 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5,
// 0x38, 0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3,
// 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4,
// 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D,
// 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1,
// 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B,
// 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4,
// 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50,
// 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D,
// 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4,
// 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA,
// 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,
// 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF,
// 0xCE, 0xF0, 0xB4, 0xE6, 0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD,
// 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, 0x47,
// 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E,
// 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79,
// 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD,
// 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27,
// 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D,
// 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B,
// 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53,
// 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1,
// 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D };
// private static int[] inv_sbox = { 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F,
// 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, 0xCA, 0x82,
// 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C,
// 0xA4, 0x72, 0xC0, 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC,
// 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, 0x04, 0xC7, 0x23,
// 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27,
// 0xB2, 0x75, 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52,
// 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, 0x53, 0xD1, 0x00, 0xED,
// 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58,
// 0xCF, 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9,
// 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, 0x51, 0xA3, 0x40, 0x8F, 0x92,
// 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
// 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E,
// 0x3D, 0x64, 0x5D, 0x19, 0x73, 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A,
// 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, 0xE0,
// 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62,
// 0x91, 0x95, 0xE4, 0x79, 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E,
// 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, 0xBA, 0x78,
// 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B,
// 0xBD, 0x8B, 0x8A, 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E,
// 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, 0xE1, 0xF8, 0x98,
// 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55,
// 0x28, 0xDF, 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41,
// 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16 };
private static int Rcon[] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39,
0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,
0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef,
0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b,
0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94,
0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,
0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f,
0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63,
0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd,
0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb };
private static byte[] xor_func(byte[] a, byte[] b) {
byte[] out = new byte[a.length];
for (int i = 0; i < a.length; i++) {
out[i] = (byte) (a[i] ^ b[i]);
}
return out;
}
private static byte[][] generateSubkeys(byte[] key) {
byte[][] tmp = new byte[Nb * (Nr + 1)][4];
int i = 0;
while (i < Nk) {
tmp[i][0] = key[i * 4];
tmp[i][1] = key[i * 4 + 1];
tmp[i][2] = key[i * 4 + 2];
tmp[i][3] = key[i * 4 + 3];
i++;
}
i = Nk;
while (i < Nb * (Nr + 1)) {
byte[] temp = new byte[4];
for(int k = 0;k<4;k++)
temp[k] = tmp[i-1][k];
if (i % Nk == 0) {
temp = SubWord(rotateWord(temp));
temp[0] = (byte) (temp[0] ^ (Rcon[i / Nk] & 0xff));
} else if (Nk > 6 && i % Nk == 4) {
temp = SubWord(temp);
}
tmp[i] = xor_func(tmp[i - Nk], temp);
i++;
}
return tmp;
}
private static byte[] SubWord(byte[] in) {
byte[] tmp = new byte[in.length];
for (int i = 0; i < tmp.length; i++)
tmp[i] = (byte) (sbox[in[i] & 0x000000ff] & 0xff);
return tmp;
}
private static byte[] rotateWord(byte[] input) {
byte[] tmp = new byte[input.length];
tmp[0] = input[1];
tmp[1] = input[2];
tmp[2] = input[3];
tmp[3] = input[0];
return tmp;
}
private static byte[][] AddRoundKey(byte[][] state, byte[][] w, int round) {
byte[][] tmp = new byte[state.length][state[0].length];
for (int c = 0; c < Nb; c++) {
for (int l = 0; l < 4; l++)
tmp[l][c] = (byte) (state[l][c] ^ w[round * Nb + c][l]);
}
return tmp;
}
private static byte[][] SubBytes(byte[][] state) {
byte[][] tmp = new byte[state.length][state[0].length];
for (int row = 0; row < 4; row++)
for (int col = 0; col < Nb; col++)
tmp[row][col] = (byte) (sbox[(state[row][col] & 0x000000ff)] & 0xff);
return tmp;
}
private static byte[][] InvSubBytes(byte[][] state) {
for (int row = 0; row < 4; row++)
for (int col = 0; col < Nb; col++)
state[row][col] = (byte)(inv_sbox[(state[row][col] & 0x000000ff)]&0xff);
return state;
}
private static byte[][] ShiftRows(byte[][] state) {
byte[] t = new byte[4];
for (int r = 1; r < 4; r++) {
for (int c = 0; c < Nb; c++)
t[c] = state[r][(c + r) % Nb];
for (int c = 0; c < Nb; c++)
state[r][c] = t[c];
}
return state;
}
private static byte[][] InvShiftRows(byte[][] state) {
byte[] t = new byte[4];
for (int r = 1; r < 4; r++) {
for (int c = 0; c < Nb; c++)
t[(c + r)%Nb] = state[r][c];
for (int c = 0; c < Nb; c++)
state[r][c] = t[c];
}
return state;
}
private static byte[][] InvMixColumns(byte[][] s){
int[] sp = new int[4];
byte b02 = (byte)0x0e, b03 = (byte)0x0b, b04 = (byte)0x0d, b05 = (byte)0x09;
for (int c = 0; c < 4; c++) {
sp[0] = FFMul(b02, s[0][c]) ^ FFMul(b03, s[1][c]) ^ FFMul(b04,s[2][c]) ^ FFMul(b05,s[3][c]);
sp[1] = FFMul(b05, s[0][c]) ^ FFMul(b02, s[1][c]) ^ FFMul(b03,s[2][c]) ^ FFMul(b04,s[3][c]);
sp[2] = FFMul(b04, s[0][c]) ^ FFMul(b05, s[1][c]) ^ FFMul(b02,s[2][c]) ^ FFMul(b03,s[3][c]);
sp[3] = FFMul(b03, s[0][c]) ^ FFMul(b04, s[1][c]) ^ FFMul(b05,s[2][c]) ^ FFMul(b02,s[3][c]);
for (int i = 0; i < 4; i++) s[i][c] = (byte)(sp[i]);
}
return s;
}
private static byte[][] MixColumns(byte[][] s){
int[] sp = new int[4];
byte b02 = (byte)0x02, b03 = (byte)0x03;
for (int c = 0; c < 4; c++) {
sp[0] = FFMul(b02, s[0][c]) ^ FFMul(b03, s[1][c]) ^ s[2][c] ^ s[3][c];
sp[1] = s[0][c] ^ FFMul(b02, s[1][c]) ^ FFMul(b03, s[2][c]) ^ s[3][c];
sp[2] = s[0][c] ^ s[1][c] ^ FFMul(b02, s[2][c]) ^ FFMul(b03, s[3][c]);
sp[3] = FFMul(b03, s[0][c]) ^ s[1][c] ^ s[2][c] ^ FFMul(b02, s[3][c]);
for (int i = 0; i < 4; i++) s[i][c] = (byte)(sp[i]);
}
return s;
}
public static byte FFMul(byte a, byte b) {
byte aa = a, bb = b, r = 0, t;
while (aa != 0) {
if ((aa & 1) != 0)
r = (byte) (r ^ bb);
t = (byte) (bb & 0x80);
bb = (byte) (bb << 1);
if (t != 0)
bb = (byte) (bb ^ 0x1b);
aa = (byte) ((aa & 0xff) >> 1);
}
return r;
}
public static byte[] encryptBloc(byte[] in) {
byte[] tmp = new byte[in.length];
byte[][] state = new byte[4][Nb];
for (int i = 0; i < in.length; i++)
state[i / 4][i % 4] = in[i%4*4+i/4];
state = AddRoundKey(state, w, 0);
for (int round = 1; round < Nr; round++) {
state = SubBytes(state);
state = ShiftRows(state);
state = MixColumns(state);
state = AddRoundKey(state, w, round);
}
state = SubBytes(state);
state = ShiftRows(state);
state = AddRoundKey(state, w, Nr);
for (int i = 0; i < tmp.length; i++)
tmp[i%4*4+i/4] = state[i / 4][i%4];
return tmp;
}
public static byte[] decryptBloc(byte[] in) {
byte[] tmp = new byte[in.length];
byte[][] state = new byte[4][Nb];
for (int i = 0; i < in.length; i++)
state[i / 4][i % 4] = in[i%4*4+i/4];
state = AddRoundKey(state, w, Nr);
for (int round = Nr-1; round >=1; round--) {
state = InvSubBytes(state);
state = InvShiftRows(state);
state = AddRoundKey(state, w, round);
state = InvMixColumns(state);
}
state = InvSubBytes(state);
state = InvShiftRows(state);
state = AddRoundKey(state, w, 0);
for (int i = 0; i < tmp.length; i++)
tmp[i%4*4+i/4] = state[i / 4][i%4];
return tmp;
}
public static byte[] encrypt(byte[] in,byte[] key){
Nb = 4;
Nk = key.length/4;
Nr = Nk + 6;
int lenght=0;
byte[] padding = new byte[1];
int i;
lenght = 16 - in.length % 16;
padding = new byte[lenght];
padding[0] = (byte) 0x80;
for (i = 1; i < lenght; i++)
padding[i] = 0;
byte[] tmp = new byte[in.length + lenght];
byte[] bloc = new byte[16];
w = generateSubkeys(key);
int count = 0;
for (i = 0; i < in.length + lenght; i++) {
if (i > 0 && i % 16 == 0) {
bloc = encryptBloc(bloc);
System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
}
if (i < in.length)
bloc[i % 16] = in[i];
else{
bloc[i % 16] = padding[count % 16];
count++;
}
}
if(bloc.length == 16){
bloc = encryptBloc(bloc);
System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
}
return tmp;
}
public static byte[] decrypt(byte[] in,byte[] key){
int i;
byte[] tmp = new byte[in.length];
byte[] bloc = new byte[16];
Nb = 4;
Nk = key.length/4;
Nr = Nk + 6;
w = generateSubkeys(key);
for (i = 0; i < in.length; i++) {
if (i > 0 && i % 16 == 0) {
bloc = decryptBloc(bloc);
System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
}
if (i < in.length)
bloc[i % 16] = in[i];
}
bloc = decryptBloc(bloc);
System.arraycopy(bloc, 0, tmp, i - 16, bloc.length);
tmp = deletePadding(tmp);
return tmp;
}
private static byte[] deletePadding(byte[] input) {
int count = 0;
int i = input.length - 1;
while (input[i] == 0) {
count++;
i--;
}
byte[] tmp = new byte[input.length - count - 1];
System.arraycopy(input, 0, tmp, 0, tmp.length);
return tmp;
}
}