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- import java.util.Arrays;
- public class AES {
- private static int Nb, Nk, Nr;
- private static short[][] w;
- private static int[] 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 short[] xor_func(short[] a, short[] b) {
- short[] outp = new short[a.length];
- for (int i = 0; i < a.length; i++) {
- outp[i] = (short) (a[i] ^ b[i]);
- }
- return outp;
- }
- private static short[][] generateSubkeys(short[] keyshort) {
- short[][] tmp = new short[Nb * (Nr + 1)][4];
- int i = 0;
- while (i < Nk) {
- tmp[i][0] = keyshort[i * 4];
- tmp[i][1] = keyshort[i * 4 + 1];
- tmp[i][2] = keyshort[i * 4 + 2];
- tmp[i][3] = keyshort[i * 4 + 3];
- i++;
- }
- i = Nk;
- while (i < Nb * (Nr + 1)) {
- short[] temp = new short[4];
- for (int k = 0; k < 4; k++)
- temp[k] = tmp[i - 1][k];
- if (i % Nk == 0) {
- temp = subWord(rotateWord(temp));
- temp[0] = (short) (temp[0] ^ (Rcon[i / Nk] & 0xff));
- } else if (Nk > 6 && i % Nk == 4) {
- temp = subWord(temp);
- }
- short[] tmp2 = { tmp[i - Nk][0], tmp[i - Nk][1], tmp[i - Nk][2],
- tmp[i - Nk][3] };
- short[] result = new short[4];
- result = xor_func(tmp2, temp);
- tmp[i] = xor_func(tmp2, temp);
- tmp[i][0] = result[0];
- tmp[i][1] = result[1];
- tmp[i][2] = result[2];
- tmp[i][3] = result[3];
- i++;
- }
- return tmp;
- }
- private static short[] subWord(short[] inp) {
- short[] tmp = new short[inp.length];
- for (int i = 0; i < tmp.length; i++)
- tmp[i] = (short) (sbox[inp[i] & 0x000000ff] & 0xff);
- return tmp;
- }
- private static short[] rotateWord(short[] input) {
- short[] tmp = new short[input.length];
- tmp[0] = input[1];
- tmp[1] = input[2];
- tmp[2] = input[3];
- tmp[3] = input[0];
- return tmp;
- }
- private static short[][] addRoundKey(short[][] state, short[][] w, int round) {
- short[][] tmp = new short[4][4];
- for (int c = 0; c < Nb; c++) {
- for (int l = 0; l < 4; l++)
- tmp[l][c] = (short) ((state[l][c] ^ w[round * Nb + c][l])%255);
- }
- return tmp;
- }
- private static short[][] subBytes(short[][] state) {
- short[][] tmp = new short[4][4];
- for (int row = 0; row < 4; row++)
- for (int col = 0; col < Nb; col++)
- tmp[row][col] = (short) (sbox[(state[row][col] & 0x000000ff)] & 0xff);
- return tmp;
- }
- private static short[][] shiftRows(short[][] state) {
- short[] t = new short[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 short[][] mixColumns(short[][] s) {
- int[] sp = new int[4];
- short b02 = (short) 0x02, b03 = (short) 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++) {
- if(sp[i]>255)
- sp[i]=sp[i]^0x1b;
- s[i][c] = (short) (sp[i]);
- }
- }
- return s;
- }
- public static short fFMul(short a, short b) {
- short aa = a, bb = b, r = 0, t;
- while (aa != 0) {
- if ((aa & 1) != 0)
- r = (short) (r ^ bb);
- t = (short) (bb & 0x80);
- bb = (short) (bb << 1);
- if (t != 0)
- bb = (short) (bb ^ 0x1b);
- aa = (short) ((aa & 0xff) >> 1);
- }
- return r;
- }
- public static short[][] encryptBloc(short[] inp) {
- short[][] state = new short[4][Nb];
- for (int i = 0; i < inp.length; i++)
- state[i / 4][i % 4] = inp[i % 4 * 4 + i / 4];
- state = addRoundKey(state, w, 0);
- for (short[] j : state) {
- for (short k : j) {
- System.out.print(Integer.toHexString(k) + " ");
- }
- }
- System.out.println();
- for (int round = 1; round < Nr; round++) {
- state = subBytes(state);
- state = shiftRows(state);
- state = mixColumns(state);
- state = addRoundKey(state, w, round);
- for (short[] j : state) {
- for (short k : j) {
- System.out.print(Integer.toHexString(k) + " ");
- }
- }
- System.out.println();
- }
- state = subBytes(state);
- state = shiftRows(state);
- state = addRoundKey(state, w, Nr);
- for (short[] j : state) {
- for (short k : j) {
- System.out.print(Integer.toHexString(k) + " ");
- }
- }
- System.out.println();
- return state;
- }
- public static short[][] encrypt(short[] messageByte, short[] keyByte) {
- Nb = 4;
- Nk = keyByte.length / 4;
- Nr = Nk + 6;
- short[][] tmp = new short[messageByte.length][messageByte.length];
- w = generateSubkeys(keyByte);
- short[][] bloc = encryptBloc(messageByte);
- tmp = Arrays.copyOf(bloc, bloc.length);
- return tmp;
- }
- }
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