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  1. public class Main {
  2.  
  3.     public static void main(String[] args) {
  4.         short[] messageByte = { 0x0c, 0x2b, 0x2f, 0xBF, 0xb7, 0x91, 0xa4, 0x72,
  5.                 0xb6, 0x62, 0x19, 0xf6, 0x1e, 0x0f, 0xf8, 0x24 };
  6.         short[] keyByte = { 0x49, 0x3E, 0x96, 0xF8, 0x44, 0xF7, 0x06, 0xE3,
  7.                 0xb8, 0x44, 0xe5, 0x08, 0xac, 0x55, 0xfe, 0x2d };
  8.  
  9.         AES.encrypt(messageByte, keyByte);
  10.     }
  11. }
  12. import java.util.Arrays;
  13.  
  14. public class AES {
  15.     private static int Nb, Nk, Nr;
  16.     private static short[][] w;
  17.  
  18.     private static int[] sbox = { 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F,
  19.             0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, 0xCA, 0x82,
  20.             0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C,
  21.             0xA4, 0x72, 0xC0, 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC,
  22.             0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, 0x04, 0xC7, 0x23,
  23.             0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27,
  24.             0xB2, 0x75, 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52,
  25.             0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, 0x53, 0xD1, 0x00, 0xED,
  26.             0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58,
  27.             0xCF, 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9,
  28.             0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, 0x51, 0xA3, 0x40, 0x8F, 0x92,
  29.             0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
  30.             0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E,
  31.             0x3D, 0x64, 0x5D, 0x19, 0x73, 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A,
  32.             0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, 0xE0,
  33.             0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62,
  34.             0x91, 0x95, 0xE4, 0x79, 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E,
  35.             0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, 0xBA, 0x78,
  36.             0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B,
  37.             0xBD, 0x8B, 0x8A, 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E,
  38.             0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, 0xE1, 0xF8, 0x98,
  39.             0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55,
  40.             0x28, 0xDF, 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41,
  41.             0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16 };
  42.  
  43.     private static int[] Rcon = { 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,
  44.             0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e,
  45.             0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef,
  46.             0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25,
  47.             0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb,
  48.             0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
  49.             0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97,
  50.             0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72,
  51.             0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66,
  52.             0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
  53.             0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,
  54.             0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
  55.             0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61,
  56.             0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
  57.             0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,
  58.             0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc,
  59.             0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,
  60.             0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,
  61.             0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,
  62.             0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c,
  63.             0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
  64.             0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4,
  65.             0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
  66.             0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb };
  67.  
  68.     private static short[] xor_func(short[] a, short[] b) {
  69.         short[] outp = new short[a.length];
  70.         for (int i = 0; i < a.length; i++) {
  71.             outp[i] = (short) (a[i] ^ b[i]);
  72.         }
  73.         return outp;
  74.     }
  75.  
  76.     private static short[][] generateSubkeys(short[] keyshort) {
  77.         short[][] tmp = new short[Nb * (Nr + 1)][4];
  78.         int i = 0;
  79.         while (i < Nk) {
  80.             tmp[i][0] = keyshort[i * 4];
  81.             tmp[i][1] = keyshort[i * 4 + 1];
  82.             tmp[i][2] = keyshort[i * 4 + 2];
  83.             tmp[i][3] = keyshort[i * 4 + 3];
  84.             i++;
  85.         }
  86.         i = Nk;
  87.         while (i < Nb * (Nr + 1)) {
  88.             short[] temp = new short[4];
  89.             for (int k = 0; k < 4; k++)
  90.                 temp[k] = tmp[i - 1][k];
  91.             if (i % Nk == 0) {
  92.                 temp = subWord(rotateWord(temp));
  93.                 temp[0] = (short) (temp[0] ^ (Rcon[i / Nk] & 0xff));
  94.             } else if (Nk > 6 && i % Nk == 4) {
  95.                 temp = subWord(temp);
  96.             }
  97.             short[] tmp2 = { tmp[i - Nk][0], tmp[i - Nk][1], tmp[i - Nk][2],
  98.                     tmp[i - Nk][3] };
  99.             short[] result = new short[4];
  100.             result = xor_func(tmp2, temp);
  101.             tmp[i] = xor_func(tmp2, temp);
  102.             tmp[i][0] = result[0];
  103.             tmp[i][1] = result[1];
  104.             tmp[i][2] = result[2];
  105.             tmp[i][3] = result[3];
  106.             i++;
  107.         }
  108.         return tmp;
  109.     }
  110.  
  111.     private static short[] subWord(short[] inp) {
  112.         short[] tmp = new short[inp.length];
  113.         for (int i = 0; i < tmp.length; i++)
  114.             tmp[i] = (short) (sbox[inp[i] & 0x000000ff] & 0xff);
  115.         return tmp;
  116.     }
  117.  
  118.     private static short[] rotateWord(short[] input) {
  119.         short[] tmp = new short[input.length];
  120.         tmp[0] = input[1];
  121.         tmp[1] = input[2];
  122.         tmp[2] = input[3];
  123.         tmp[3] = input[0];
  124.         return tmp;
  125.     }
  126.  
  127.     private static short[][] addRoundKey(short[][] state, short[][] w, int round) {
  128.         short[][] tmp = new short[4][4];
  129.         for (int c = 0; c < Nb; c++) {
  130.             for (int l = 0; l < 4; l++)
  131.                 tmp[l][c] = (short) ((state[l][c] ^ w[round * Nb + c][l])%255);
  132.         }
  133.         return tmp;
  134.     }
  135.  
  136.     private static short[][] subBytes(short[][] state) {
  137.  
  138.         short[][] tmp = new short[4][4];
  139.         for (int row = 0; row < 4; row++)
  140.             for (int col = 0; col < Nb; col++)
  141.                 tmp[row][col] = (short) (sbox[(state[row][col] & 0x000000ff)] & 0xff);
  142.  
  143.         return tmp;
  144.     }
  145.  
  146.     private static short[][] shiftRows(short[][] state) {
  147.  
  148.         short[] t = new short[4];
  149.         for (int r = 1; r < 4; r++) {
  150.             for (int c = 0; c < Nb; c++)
  151.                 t[c] = state[r][(c + r) % Nb];
  152.             for (int c = 0; c < Nb; c++)
  153.                 state[r][c] = t[c];
  154.         }
  155.  
  156.         return state;
  157.     }
  158.  
  159.     private static short[][] mixColumns(short[][] s) {
  160.         int[] sp = new int[4];
  161.         short b02 = (short) 0x02, b03 = (short) 0x03;
  162.         for (int c = 0; c < 4; c++) {
  163.             sp[0] = fFMul(b02, s[0][c]) ^ fFMul(b03, s[1][c]) ^ s[2][c]
  164.                     ^ s[3][c];
  165.             sp[1] = s[0][c] ^ fFMul(b02, s[1][c]) ^ fFMul(b03, s[2][c])
  166.                     ^ s[3][c];
  167.             sp[2] = s[0][c] ^ s[1][c] ^ fFMul(b02, s[2][c])
  168.                     ^ fFMul(b03, s[3][c]);
  169.             sp[3] = fFMul(b03, s[0][c]) ^ s[1][c] ^ s[2][c]
  170.                     ^ fFMul(b02, s[3][c]);
  171.             for (int i = 0; i < 4; i++) {
  172.                 if(sp[i]>255)
  173.                     sp[i]=sp[i]^0x1b;
  174.                 s[i][c] = (short) (sp[i]);
  175.             }
  176.         }
  177.  
  178.         return s;
  179.     }
  180.  
  181.     public static short fFMul(short a, short b) {
  182.         short aa = a, bb = b, r = 0, t;
  183.         while (aa != 0) {
  184.             if ((aa & 1) != 0)
  185.                 r = (short) (r ^ bb);
  186.             t = (short) (bb & 0x80);
  187.             bb = (short) (bb << 1);
  188.             if (t != 0)
  189.                 bb = (short) (bb ^ 0x1b);
  190.             aa = (short) ((aa & 0xff) >> 1);
  191.         }
  192.         return r;
  193.     }
  194.  
  195.     public static short[][] encryptBloc(short[] inp) {
  196.         short[][] state = new short[4][Nb];
  197.  
  198.         for (int i = 0; i < inp.length; i++)
  199.             state[i / 4][i % 4] = inp[i % 4 * 4 + i / 4];
  200.  
  201.         state = addRoundKey(state, w, 0);
  202.         for (short[] j : state) {
  203.             for (short k : j) {
  204.                 System.out.print(Integer.toHexString(k) + " ");
  205.             }
  206.         }
  207.         System.out.println();
  208.         for (int round = 1; round < Nr; round++) {
  209.             state = subBytes(state);
  210.             state = shiftRows(state);
  211.             state = mixColumns(state);
  212.             state = addRoundKey(state, w, round);
  213.             for (short[] j : state) {
  214.                 for (short k : j) {
  215.                     System.out.print(Integer.toHexString(k) + " ");
  216.                 }
  217.             }
  218.             System.out.println();
  219.         }
  220.         state = subBytes(state);
  221.         state = shiftRows(state);
  222.         state = addRoundKey(state, w, Nr);
  223.         for (short[] j : state) {
  224.             for (short k : j) {
  225.                 System.out.print(Integer.toHexString(k) + " ");
  226.             }
  227.         }
  228.         System.out.println();
  229.         return state;
  230.     }
  231.  
  232.     public static short[][] encrypt(short[] messageByte, short[] keyByte) {
  233.  
  234.         Nb = 4;
  235.         Nk = keyByte.length / 4;
  236.         Nr = Nk + 6;
  237.         short[][] tmp = new short[messageByte.length][messageByte.length];
  238.  
  239.         w = generateSubkeys(keyByte);
  240.         short[][] bloc = encryptBloc(messageByte);
  241.         tmp = Arrays.copyOf(bloc, bloc.length);
  242.         return tmp;
  243.     }
  244.  
  245. }
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